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midi LOGGER
SERVICE MANUAL
820GL820-UM-251
GL820-UM-251-02-9370
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GL820-UM-251-9370 i
HISTORY OF REVISIONSNo. Date issued Description of revision Page Edition1 10.02.18 First Printing All 012 10.04.06 The size of screws were corrected. 3-5, 3-8 02345
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GL820-UM-251-9370 ii
TO ENSURE SAFETYThis Service Manual has been compiled for the purpose of facilitating repair and maintenance of the GL820 midi LOGGER by Graphtec service personnel and other persons who have undergone equivalent technical training.Maintenance or repair by unauthorized service personnel is to be strictly avoided. Because the GL820 contains numerous internal components with a high electric potential, such work by unauthorized service personnel could cause human injury or serious damage to the GL820 midi LOGGER.
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GL820-UM-251-9370 iii
CONTENTS1. CONFIGURATION ................................................................................. 1-1
1.1 Model Configuration .....................................................................................................1-11.2 Accessories and Options .............................................................................................1-1
2. UPGRADING THE FIRMWARE ............................................................ 2-12.1 Note for the firmware upgrading ..................................................................................2-12.2 How to Upgrade the GL820 Flash ROM from the USB memory device ...................2-1
3. DISASSEMBLY AND REASSEMBLY ................................................... 3-13.1 Notes on Disassembly and Reassembly ....................................................................3-13.2 Removing the Input Terminal Unit ...............................................................................3-23.3 Removing the Side Pads ...............................................................................................3-33.4 Disassembling the Top Cover and the Bottom Case Assembly .............................. 3-43.5 Replacing the Main Control Board ..............................................................................3-53.6 Replacing the Control Panel Board ............................................................................ 3-63.7 Replacing the LCD and the Top cover .........................................................................3-73.8 Replacing the AMP Board ........................................................................................... 3-8
4. SETUP PROCEDURES ......................................................................... 4-14.1 Entering the System Setup Menu ................................................................................4-14.2 AC Line cycle Setting ................................................................................................... 4-34.3 Performing Setup1 (Voltage Input) ............................................................................. 4-44.4 Performing Setup2 (Room Temperature Compensation) ......................................... 4-84.5 Performing Setup3 (RTD)............................................................................................4-12
5. INSPECTION AND CHECK PROCEDURES ........................................ 5-15.1 Preparations for inspections .......................................................................................5-1
5.1.1 AC Line Setting .....................................................................................................................5-15.1.2 Sampling setting ....................................................................................................................5-15.1.3 Copy the condition settings file .............................................................................................5-15.1.4 How to load the condition settings file to the GL820 from a USB memory device ...............5-2
5.2 Voltage Measurement Accuracy ................................................................................. 5-65.3 Temperature Accuracy ................................................................................................. 5-95.4 RTD Accuracy ..............................................................................................................5-11
6. PARTS LISTS ........................................................................................ 6-16.1 Recommended Parts List .............................................................................................6-16.2 Parts Lists ......................................................................................................................6-2
6.2.1 Outer Casing .........................................................................................................................6-26.2.2 Bottom Parts .........................................................................................................................6-36.2.3 Top Parts .............................................................................................................................. 6-46.2.4 Bottom Case ........................................................................................................................ 6-66.2.5 Terminal Unit ........................................................................................................................ 6-66.2.6 Standard Accessories ...........................................................................................................6-7
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7. Block Diagram ...................................................................................... 7-17.1 Main Unit Power Block & Main Control ....................................................................... 7-17.2 Main Control Block ........................................................................................................7-27.3 AMP Block ......................................................................................................................7-37.3 Details of the AMP .........................................................................................................7-4
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GL820-UM-251-9370 1-1
1. CONFIGURATION
1. CONFIGURATION
1.1 Model ConfigurationGL820 : 20-channel model with color monitor and internal memory
1.2 Accessories and OptionsUnit name Model
nameDescription
Logic / Alarm cable B-513DC Drive Cable B-514 Same as GL200/450/500Battery Pack B-517 Same as GL200/450/500Humidity Sensor B-530 Same as GL200/450/500Extended Terminal Base Unit B-537 Option20 Ch Extended Terminal Unit B-538 OptionRod-shaped K-type thermocouple RIC-410K-type thermocouple for static surfaces RIC-420L-shaped K-type thermocouple for static surfaces RIC-430
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GL820-UM-251-9370 1-2
1. CONFIGURATION
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GL820-UM-251-9370 2-1
2. UPGRADING THE FIRMWAREThe version of your GL820’s firmware can be upgraded by rewriting the flash ROM on the pertinent circuit boards. You can upgrade the firmware by loading the update program to a USB memory device.
2.1 Note for the firmware upgrading• Save the measuring condition to the internal memory or the USB memory before the firmware upgrade.• Don't turn off the power during upgrading the firmware.
2.2 How to Upgrade the GL820 Flash ROM from the USB memory device
Preparations for the upgradeFirmware :MainVerxxxRevxxxxAxx.GL820 ← Main Program file for GL820 :PatternVerxxxRevxxxxAxx.GL820← Font file for GL820
(1) Connect the AC adapter for the GL820.(2) Turn on the GL820.(3) Copy the two files to a USB memory device from the computer. (Copy the two main program files to root directory of a USB memory. Do not copy them to any folder.)
How to upgrade(1) Insert the USB memory device containing the main upgrade program into the GL800's USB port.
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GL820-UM-251-9370 2-2
2. UPGRADING THE FIRMWARE
(2) Turn on the GL820 to display the menu below. And then select the upgrade program file by using the [UP Arrow] direction key or the [Down Arrow]
direction key.
(3) Press [ENTER] key to execute the upgrade.(4) Wait until the display shown below appears or until the beeper sound stops. Note: Don't turn off the GL820 until this process is finished.
The following message will appear on the GL820 display in yellow characters when the upgrade is complete. Also the beeper will sound for 5 seconds.“Please Turn Off the Power. I have locked up.”
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GL820-UM-251-9370 2-3
(5) Turn off the power to the GL820 when the above message is displayed or when the beeper sound stops.
(6) Delete the two program files from a USB memory device.This is to avoid upgrading the firmware by mistake.
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GL820-UM-251-9370 3-1
3. DISASSEMBLY AND REASSEMBLY
3. DISASSEMBLY AND REASSEMBLY3.1 Notes on Disassembly and Reassembly
• During disassembly, disconnect the cables from the specified connectors as necessary.• During reassembly, double-check to ensure that the proper cables have been correctly re-connected to
the pertinent connectors.• Some areas of the control panel unit possess a high electrical potential, so exercise caution to avoid an
electrical shock.
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GL820-UM-251-9370 3-2
3. DISASSEMBLY AND REASSEMBLY
3.2 Removing the Input Terminal Unit
Disassembly(1) Remove the input terminal unit as shown in the picture below. Pull the terminal unit out towards the direction indicated by the arrow while pressing the two locks at the
bottom of the unit.(1) Press the two locks in the direction indicated by arrows.
(2) Pull the unit out towards the direction indicated by the arrow.
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GL820-UM-251-9370 3-3
3. DISASSEMBLY AND REASSEMBLY
3.3 Removing the Side Pads
Disassembly(1) Peel off the left and right side pads from the main unit.
Right side pad
Left side pad
Main unit
Re-assembly(1) Push the left and right side pads against the main unit and then install them on the main unit.
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GL820-UM-251-9370 3-4
3. DISASSEMBLY AND REASSEMBLY
3.4 Disassembling the Top Cover and the Bottom Case Assembly
Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.3).(2) Remove the side pads from the main unit (See Section 3.4).(3) Remove the four M2L8 self-tapping screws from the bottom cover.(4) Disconnect the connector between the main control board and the AMP board and then remove the top
cover assembly.
M2L8 self-tapping screw
Top cover assembly
Bottom case assembly
Re-assembly(1) Re-assemble the top cover assembly and the bottom case assembly in the reverse order in which they
were disassembled.
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GL820-UM-251-9370 3-5
3. DISASSEMBLY AND REASSEMBLY
3.5 Replacing the Main Control Board
Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(4) Disconnect the LCD flexible cable from the main control board.(5) Remove the two M2L6 self-tapping screws holding the main control board from the top cover assembly.(6) Disconnect the connector between the main control board and the control panel board and then remove
the top cover assembly.
M2L6 self-tapping screw
LED flexible cable
Main control board
Top cover assembly
Core
Fixing tape
Re-assembly(1) Re-assemble the main control board in the reverse order in which it was disassembled.
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GL820-UM-251-9370 3-6
3. DISASSEMBLY AND REASSEMBLY
3.6 Replacing the Control Panel Board
Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(3) Remove the main control board (See Section 3.5).(4) Remove the two M2L6 self-tapping screws holding the LCD bracket, and then detach the LCD bracket.(5) Remove the four M2L6 self-tapping screws holding the control panel board.(6) Remove the control panel board from the top cover assembly.
M2L6 self-tapping screw
Top cover assembly
Control panel board
M2L6 self-tapping screw
LCD bracket
Re-assembly(1) Re-assemble the control panel board in the reverse order in which it was disassembled.
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GL820-UM-251-9370 3-7
3. DISASSEMBLY AND REASSEMBLY
3.7 Replacing the LCD and the Top coverThe LCD is supplied together with the top cover assembly.This is avoiding to get the dust between the LCD and the top cover panel.
Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(3) Remove the main control board (See Section 3.5).(4) Remove the key pad from the top cover assembly.
Key pad
LCD bracket
Top cover assembly with LCD
Control panel board
Re-assembly(1) Re-assemble the LCD and the top cover assembly in the reverse order in which it was disassembled.
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GL820-UM-251-9370 3-8
3. DISASSEMBLY AND REASSEMBLY
3.8 Replacing the AMP Board
Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(4) Remove the four M2L6 self-tapping screws holding the AMP board from the bottom case assembly.(5) Detach the AMP board from the bottom case assembly.(6) Remove the two M2.6L6 binding head screws holding the terminal unit connector cover.(7) Detach the terminal unit connector cover from the AMP board.
M2L6 self-tapping screw
Bottom case assembly
AMP board
Terminal unit connector cover
M2.6L6 binding head screw
Re-assembly(1) Re-assemble the AMP board in the reverse order in which it was disassembled.(2) Perform the Setup operations for the GL820 when you replace the AMP board.
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GL820-UM-251-9370 4-1
4. SETUP PROCEDURES
4. SETUP PROCEDURES
4.1 Entering the System Setup Menu(1) Press the [MENU] key until the “OTHR” menu shown below appears.
(2) Press the [LEFT DOUBLE ARROW Direction] key 10 times in order to display the “Setup” menu shown below.
(3) Move the cursor to the “Mode” position using the [Direction] keys.(4) Press the [ENTER] key to display the menu from which you can execute the various Setup operations.
Setup modeSetup1 (Basic)Setup2 (Room temp.)Setup3 (RTD temp.)
(5) Select the Setup mode using the [Direction] keys, and then press the [ENTER] key.
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GL820-UM-251-9370 4-2
4. SETUP PROCEDURES
(6) Move the cursor to the “Execute Setup” position as shown below.
(7) Press the [ENTER] key to start the selected Setup operation.
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GL820-UM-251-9370 4-3
4. SETUP PROCEDURES
4.2 AC Line cycle SettingYou must set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line before you perform the Setup operations.
How to set the AC line cycle(1) Press the [MENU] key until the "OTHR" menu shown below appears.
(2) Move the cursor to the "AC Line cycle" position using the [Direction] keys.(3) Press the [ENTER] key to display the "AC Line cycle" selection menu shown below.
(4) Select the appropriate cycle for your AC line.
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GL820-UM-251-9370 4-4
4. SETUP PROCEDURES
4.3 Performing Setup1 (Voltage Input)This procedure is required when any part of the AMP board is replaced.
Preparation• Have a voltage generator on hand that can output voltage up to 50 VDC (four-digit output).• Mutually connect the ground terminals of the voltage generator and the GL820.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.
Wiring connection
0.00000 V
Voltage generator
FG
GND
AC adapterConnect to CH1
Input cable
Connect both ends to GND
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GL820-UM-251-9370 4-5
4. SETUP PROCEDURES
Setup procedure(1) As shown in the figure above, connect the output of the voltage generator to the GL820’s CH1 input
terminal.(2) Leave the GL820 turned on for at least 30 minutes. And leave the GL820 turned on for at least 10
minutes after wiring.(3) After entering the System Setup mode, open the Setup menu as shown below.
Specify the AMP Setup conditions as shown below.Mode :Setup1 (Basic)CH :CH 1
(4) Move the cursor to the “Execute Setup” position as shown below.
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GL820-UM-251-9370 4-6
4. SETUP PROCEDURES
(5) Press the [ENTER] key to start the Setup1 (Basic) operation.
Message
(6) The “GND : [START]” message is displayed at the location shown above.(7) Input “0.000mV” to the input terminals of channel 1.(8) Press the [START] key and then wait until the "20 mV : [START]" message appears.
Specify the voltage generator's output voltage setting to correspond to one of the displayed voltage ranges in the following table, and then input that voltage to the GL820.
Message Input VoltageGND 0.000 mV
20 mV 20.000 mV50 mV 50.000 mV100 mV 100.000 mV200 mV 200.000 mV500 mV 500.000 mV
1 V 1.000 V2 V 2.000 V5 V 5.000 V10 V 10.000 V20 V 20.000 V50 V 50.000 V
(9) Repeat step (8) by sequentially setting the Measure parameter to 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V, 20 V and 50 V, and then inputting the corresponding voltage.
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GL820-UM-251-9370 4-7
4. SETUP PROCEDURES
(10) When you have finished the Setup operation for 50 V, the "EEPROM : [ENTER]" message appears.Press the [ENTER] key to begin writing the new Setup data to the EEPROM.
Message
(11) After the setup parameters have been registered to the EEPROM, the display closes and returns to normal mode.
(12) Turn off the GL820.This completes the voltage amp setup.
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GL820-UM-251-9370 4-8
4. SETUP PROCEDURES
4.4 Performing Setup2 (Room Temperature Compensation)This procedure is required when any part of the relay board is replaced.Setup the Setup 1 when the amp board was replaced before performing this procedure.
Preparation• As shown below, use (T: ø0.32 mm, K: ø0.65 mm) temperature compensation leads to connect the input
terminals to the 0˚C reference temperature device (Zero controller).• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.
Wiring connection
(T) compensation lead
(K) compensation lead
(T) input side
(T) output side
0˚C referencetemperature device(Zero Controller)
(K) input side
(K) output side
Input 0 V for the output side or short the + and - terminals
AC adapter
Connect the GND terminals.
Connect (T) compensation lead to the CH1, CH6, CH11 and CH16 input terminals.Connect (K) compensation lead to the CH3, CH8, CH13 and CH17 input terminals.
CAUTIONConnect each compensation copper lead to a single terminal as shown in the above diagram (parallel wiring is not permitted).
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GL820-UM-251-9370 4-9
4. SETUP PROCEDURES
Setup procedure(1) As shown in the figure above, connect the inputs of the zero controller to the GL820’s input terminals.(2) Leave the GL820 turned on for at least 30 minutes. And leave the GL820 turned on for at least 10
minutes after wiring.(3) After entering the System Setup mode, open the Setup menu as shown below.
Specify the AMP Setup conditions as shown below.Mode :Setup2 (Room temp.)Sensor :Sensor1Area :Area1CH :CH 1
(4) Move the cursor to the “Execute Setup” position as shown below.
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GL820-UM-251-9370 4-10
4. SETUP PROCEDURES
(5) Press the [ENTER] key to start the Setup2 (Room temp.) operation.
Message
(6) The “rTemp : [START]” message is displayed at the location shown above.(7) Press the [START] key and then wait until the "EEPROM : [ENTER]" message appears.
Message
(8) Press the [ENTER] key to begin writing the new Setup data to the EEPROM.(9) After the setup parameters have been registered to the EEPROM, the display closes and returns to
normal mode.
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GL820-UM-251-9370 4-11
4. SETUP PROCEDURES
(10) Re-open the Setup menu as shown below.Specify the AMP Setup conditions as shown below.Mode :Setup2 (Room temp.)Sensor :Sensor1Area :Area2CH :CH 1
(11) Repeat steps (4) to (8) for all the areas up to Area 4.(12) Turn off the GL820.This completes the Room temp. setup.
Setup flow for the Room temp.Procedure Selected area
1 Area 12 Area 23 Area 34 Area 4
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GL820-UM-251-9370 4-12
4. SETUP PROCEDURES
4.5 Performing Setup3 (RTD)
Preparation• Have reference resistors to setup RTD. Reference resistors: 0 Ω (Short), 350 Ω ±0.01%, 2500 Ω ±0.01%• As shown below, use reference resistors to connect the CH20.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.
Wiring connection
(+) (-) (b)
Reference resistors:(1) 0 Ω (Short)(2) 350 Ω ±0.01%(3) 2500 Ω ±0.01%
AC adapterConnect to the CH20 input terminals.
Connect to the GND
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GL820-UM-251-9370 4-13
4. SETUP PROCEDURES
Setup procedure(1) As shown in the figure above, connect the reference resistor to the GL820’s input terminals.(2) Leave the GL820 turned on for at least 30 minutes. And leave the GL820 turned on for at least 10
minutes after wiring.(3) After entering the System Setup mode, open the Setup menu as shown below.
Specify the AMP Setup conditions as shown below.Mode :Setup3 (RTD temp.)CH :CH 20
(4) Move the cursor to the “Execute Setup” position as shown below.
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GL820-UM-251-9370 4-14
4. SETUP PROCEDURES
(5) Press the [ENTER] key to start the Setup3 (RTD temp.) operation.
Message
(6) The "0 ohm : [START]" message is displayed at the location shown above.(7) Connect the reference 0 Ω resistor to the input terminals of channel 20.(8) Press the [START] key and then wait until the "350 ohm : [START]" message appears.
Replace the reference resistor to correspond to one of the displayed resistors in the following table and then press the [START] key.
Message Reference resistor0 ohm 0 Ω
350 ohm 350 Ω2500 ohm 2500 Ω
(9) Repeat step (8) by sequentially to 350 Ω and 2500 Ω.(10) The "EEPROM : [ENTER]" message appears when the 2500 ohm setup was completed.
Message
(11) Press the [ENTER] key to begin writing the new Setup data to the EEPROM.(12) After the setup parameters have been registered to the EEPROM, the display closes and returns to
normal mode.
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GL820-UM-251-9370 4-15
4. SETUP PROCEDURES
(13) Turn off the GL820.This completes the RTD temp. setup.
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GL820-UM-251-9370 5-1
5. INSPECTION AND CHECK PROCEDURES
5. INSPECTION AND CHECK PROCEDURES
5.1 Preparations for inspections
5.1.1 AC Line Setting(1) Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line (See Section 4.2).
5.1.2 Sampling setting(1) Set the Sampling setting of the GL820 to at least 1 sec or longer.
5.1.3 Copy the condition settings fileCondition settings files :GL820ConditionVolt.CND ← Condition settings for Voltage accuracy :GL820ConditionTC.CND ← Condition settings for T and K range accuracy :GL820ConditionPT.CND ← Condition settings for PT range accuracy
(1) Copy the condition settings file to a USB memory device from the computer.
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GL820-UM-251-9370 5-2
5. INSPECTION AND CHECK PROCEDURES
5.1.4 How to load the condition settings file to the GL820 from a USB memory device(1) Connect the USB memory device to the GL820.
(2) Press the [FILE] key to display the menu below.
(3) Move the cursor to the “Load” position using the [Direction] keys.
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GL820-UM-251-9370 5-3
5. INSPECTION AND CHECK PROCEDURES
(4) Press the [ENTER] key to display the menu below.
(5) Move the cursor to the “File Name” position using the [Direction] keys.(6) Press the [ENTER] key to display the menu shown below.
(7) Move the cursor to the “USB1” position using the [Direction] keys.
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GL820-UM-251-9370 5-4
5. INSPECTION AND CHECK PROCEDURES
(8) Press the [Left Arrow Direction] key to display files as shown below.
(9) Specify the condition settings file to execute the various inspection operations by using the [DOWN Arrow Direction] key or the [UP Arrow Direction] key.
(10) Press the [ENTER] key to display the menu shown below.
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GL820-UM-251-9370 5-5
5. INSPECTION AND CHECK PROCEDURES
(11) Move the cursor to the “OK” position using the [Direction] keys.
(12) Press the [ENTER] key to display the menu below.
(13) Move the cursor to the “OK” position using the [Direction] keys.
(14) Press the [ENTER] key to load the condition settings file.
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GL820-UM-251-9370 5-6
5. INSPECTION AND CHECK PROCEDURES
5.2 Voltage Measurement AccuracySupply the reference voltage or frequency determined for each measurement range, and then check the voltage accuracy.
Preparation• Have a voltage generator on hand that can output voltage up to 50 VDC (using four-digit output).• Mutually connect the ground terminals of the voltage generator and the GL820 prior to initiating
measurement.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.• Set the Sampling setting of the GL820 to at least 1 sec or longer.
Wiring connectionSame wiring connection as Setup1. (See Setup1 procedure)
Setting procedure(1) Load the condition settings file "GL820ConditionVolt.CND" from the USB memory device.
Measurement procedure(1) Press the [MENU] key to display the menu shown below.
(2) Move the cursor to the Range position of channel 1.(3) Press the [ENTER] key to display the menu shown below, and then select the reference voltage range.
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GL820-UM-251-9370 5-7
5. INSPECTION AND CHECK PROCEDURES
(4) Press the [DISPLAY] key until the menu shown below appears.
(5) Press the [Left DOUBLE Arrow] key to display the menu shown below.
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GL820-UM-251-9370 5-8
5. INSPECTION AND CHECK PROCEDURES
(6) Input the reference voltage for each range according to the table below, and then check that the level of measurement is within the rating.
Voltage precision ratingsRange Input voltage Factory Rating (±0.08%) Product Rating (±0.1%)20 mV +20.000 mV +19.984 mV to +20.016 mV +19.98 mV to +20.02 mV50 mV +50.000 mV +49.96 mV to +50.04 mV +49.95 mV to +50.05 mV100 mV +100.00 mV +99.92 mV to +100.08 mV +99.9 mV to +100.1 mV200 mV +200.00 mV +199.84 mV to +200.16 mV +199.8 mV to +200.2 mV500 mV +500.00 mV +499.6 mV to +500.4 mV +499.5 mV to +500.5 mV
1 V +1.0000 V +0.9992 V to +1.0008 V +0.999 V to +1.001 V2 V +2.0000 V +1.9984 V to +2.0016 V +1.998 V to +2.002 V5 V +5.0000 V +4.996 V to +5.004 V +4.995 V to +5.005 V
10 V +10.0000 V +9.992 V to +10.008 V +9.99 V to +10.01 V20 V +20.0000V +19.984 V to +20.016 V +19.98 V to +20.02 V50 V +50.000 V +49.96 V to +50.04 V +49.95 V to +50.05 V
This value will change when the reference voltage is input from the voltage generator.
(7) Press the [START/STOP] key when the input voltage stabilizes.(8) Wait until the "Finished" message is displayed, and then display the values as shown below.
Message
Confirm that this value is within the above ratings after data has been captured.
(9) Repeat steps (1) to (8), and then confirm that each value is within the above ratings.
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GL820-UM-251-9370 5-9
5. INSPECTION AND CHECK PROCEDURES
5.3 Temperature Accuracy
Preparation• Use (T) and (K) temperature compensation leads to connect a 0˚C reference temperature device (zero
controller) to the GL820 input terminals.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.• Set the Sampling setting of the GL820 to at least 1 sec or longer.
Wiring connectionSame wiring connection as Setup2. (See Setup2 procedure)
Setting procedure(1) Load the condition settings file GL820ConditionTC.CND from the USB memory device.
Measurement procedure (temperature accuracy)(1) Short the input reference voltage signal for the 0˚C reference temperature device (zero controller)
according to the table below, then check that the level of measurement is within the rating.Input voltage precision ratings (Type T)
Temperature Input voltage Factory Rating Product Rating 0 ˚C 0.000 mV -0.8 ˚C to +0.8 ˚C -1.0 ˚C to +1.0 ˚C
Input voltage precision ratings (Type K)Temperature Input voltage Factory Rating Product Rating
0 ˚C 0.000 mV -1.0 ˚C to +1.0 ˚C -1.5 ˚C to +1.5 ˚C(2) Press the [DISPLAY] key until the menu shown below appears.
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GL820-UM-251-9370 5-10
5. INSPECTION AND CHECK PROCEDURES
(3) Press the [Left DOUBLE Arrow] key to display the menu shown below.
(4) Press the [START/STOP] key to measure the temperature.(5) Wait until the "Finished" message is displayed, and then display the values as shown below.
Message
Confirm that this value is within the above ratings after data has been captured.
(6) Check that the level of measurement is within the above rating from the CH1 to the CH10.(7) Press the [CH GROUP] key to display from the CH11 to the CH20.
Confirm that this value is within the above ratings after data has been captured.
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GL820-UM-251-9370 5-11
5. INSPECTION AND CHECK PROCEDURES
5.4 RTD AccuracyPreparation• Have reference resistors to setup RTD. Reference resistors: 350 Ω ±0.01%, 2500 Ω ±0.01%• As shown below, use reference resistors to connect the CH20.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.
Wiring connectionSame wiring connection as Setup3. (See Setup3 procedure)
Setting procedure(1) Load the condition settings file GL820ConditionPT.CND from the USB memory device.
Measurement procedure (RTD accuracy)
(1) Connect the reference resistor to the input terminals of channel 20.
(2) Press the [DISPLAY] key until the menu shown below appears.
(3) Press the [Left DOUBLE Arrow] key to display the menu shown below.
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GL820-UM-251-9370 5-12
5. INSPECTION AND CHECK PROCEDURES
(4) Press the [CH GROUP] key to display from the CH11 to the CH20.
(5) Press the [START/STOP] key to measure.
(6) Wait until the "Finished" message is displayed, and then display the values as shown below.Message
Confirm that this value is within the below ratings after data has been captured.
(7) Check that the level of measurement is within below rating.RTD precision ratings
Range Input resistorReference
TemperatureFactory Rating Product Rating
Pt100 350 Ω 715.3 ˚C +714.5 ˚C to +716.1 ˚C +714.3 ˚C to +716.3 ˚CPt1000 2500 Ω 408.8 ˚C +407.8 ˚C to +409.2 ˚C +408.0 ˚C to +409.6 ˚C
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GL820-UM-251-9370 6-1
6. PARTS LISTS
6. PARTS LISTS
6.1 Recommended Parts ListNo. Part No. Part Name Description Q'ty Remarks1 795820700 Main Control Board with SD card, GL820 12 795820701 AMP Board, GL820 13 795800702 Control Panel Board 1 Same as GL8004 795800710 AC Adapter JP, with AC cable KSAH2400200T1M2 1 Japan5 795800711 AC Adapter UL, with AC cable KSAH2400200T1M2 1 UL6 795800712 AC Adapter CEE, with AC cable KSAH2400200T1M2 1 CEE7 795800713 AC Adapter BS, with AC cable KSAH2400200T1M2 1 BS8 795800714 AC Adapter CCC, with AC cable KSAH2400200T1M2 1 China
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GL820-UM-251-9370 6-2
6. PARTS LISTS
6.2 Parts Lists
6.2.1 Outer CasingNo. Part No. Part Name Description Q'ty Remarks Rank1 795820703 Top Cover with LCD 1 A2 795820704 Bottom Case 1 C3 604810510 Left Side Pad 1 C4 604810520 Right Side Pad 1 C
Outer Casing
1
3
2
4
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GL820-UM-251-9370 6-3
6. PARTS LISTS
6.2.2 Bottom PartsNo. Part No. Part Name Description Q'ty Remarks Rank1 795820701 AMP Board 1 A2 604810051 Cover, Connector 1 C
Bottom Parts
1
2
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GL820-UM-251-9370 6-4
6. PARTS LISTS
6.2.3 Top PartsNo. Part No. Part Name Description Q'ty Remarks Rank1 795820700 Main Control Board, with SD card 1 A2 795800702 Control Panel Board 1 A3 795820703 Top Cover, with LCD 1 A4 604820020 Bracket, LCD 1 C5 604810033 Key Pad 1 C6 562500097 Core, LCD Flexible Cable E04FG270712 1 C7 690482010 Flexible Cable, LCD FC,RN8112-01 1 C
Top Parts
3
4
2
1
5
6
Fixing tape for core
7
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GL820-UM-251-9370 6-5
6. PARTS LISTS
Replaceable parts for the main control boardNo. Part No. Part Name Description Q'ty Remarks Rank1 561630005 Switch, AJ76231BF SW1: Power Switch 1 A2 561550037 Connector, HEC0470-01-640 JP14: DC Input 1 A3 561500112 USB Type A Connector, XM7A-0442 J7: USB Connector 1 A4 561500082 USB Type B Connector, XM7B-0442 J8: USB Connector 1 A5 561550041 LAN Connector, TM11R-5M2-88-LP J9: LAN Connector 1 A6 562070001 Backup Battery, ML2130-TT BAT1: Backup Battery 1 A
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GL820-UM-251-9370 6-6
6. PARTS LISTS
6.2.4 Bottom CaseNo. Part No. Part Name Description Q'ty Remarks Rank1 604220030 Cover, Battery 1 C2 795820704 Bottom Case 1 C
Bottom Case
2
1
6.2.5 Terminal UnitNo. Part No. Part Name Description Q'ty Remarks Rank1 795800707 Terminal Unit 1 A2 795800705 Terminal Base 1 A3 795800706 Terminal Base Plate Including 4 screws 1 A4 795800708 Terminal Base Extension Cable 1 A
21 4
3
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GL820-UM-251-9370 6-7
6. PARTS LISTS
6.2.6 Standard AccessoriesNo. Part No. Part Name Description Q'ty Remarks Rank1 GL820-CDM01M CD Manual, Software 1 B
2 604829040 GL820-UM-851 Quick Start Manual 1 English B604829030 GL820-UM-801 Quick Start Manual 1 Japanese B
3 795800710 AC Adapter JP, with AC cable KSAH2400200T1M2 1 Japan A4 795800711 AC Adapter UL, with AC cable KSAH2400200T1M2 1 UL A5 795800712 AC Adapter CEE, with AC cable KSAH2400200T1M2 1 CEE A6 795800713 AC Adapter BS, with AC cable KSAH2400200T1M2 1 BS A7 795800714 AC Adapter CCC, with AC cable KSAH2400200T1M2 1 China A
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GL820-UM-251-9370 7-1
7. BLOCK DIAGRAM
7. Block Diagram7.1 Main Unit Power Block & Main Control
AC
Ada
pter
AC
IN
KSA
H24
0020
0T1M
2
1. 2.
NO
TE
Seco
ndar
y ci
rcui
t
Prim
ary
circ
uit
With
exp
ande
d te
rmia
l opt
ion
Stan
dard
ISO
LATI
ON
ISO
LATI
ON
Prim
ary
circ
uit
Sign
alin
put
circ
uit
Seco
ndar
yci
rcui
t
POW
ERSW
Mai
n U
nit P
ower
Blo
ck &
Mai
n C
ontro
l
Mai
n C
ontro
lB
oard
(RN
8113
-01*
)
J203
J13
SW
J14
: Con
nect
or to
Con
nect
or
To H
umid
ity S
enso
r
J15
To B
atte
ry1
AM
P B
oard
(RN
8113
-02*
)
J301J6
KEY
Boa
rd(R
N60
62-0
3*)
J501
J401
J502
J402
YALE
Rdrao
B*)40-2606
N(R
TER
MIN
AL
Boa
rd(R
N60
62-0
5*)
304JJ201
J16
To B
atte
ry2
J205
POW
ERSW
Mai
n C
ontro
lB
oard
(RN
8113
-01*
)
J203J13
SW
J14
J15
AM
P B
oard
(RN
8113
-02*
)
J301J6
KEY
Boa
rd(R
N60
62-0
3*)
J501 J4
01
J502
J402
REL
AY
Boa
rd(R
N60
62-0
4*)
J403
J202
J16
J205
To H
umid
ity S
enso
r
To B
atte
ry1
To B
atte
ry2
TER
MIN
AL
Boa
rd(R
N60
62-0
5*)
TER
MIN
AL
BA
SEB
oard
(RN
6062
-06*
)
J501 J4
01
J502
J402
REL
AY
Boa
rd(R
N60
62-0
4*)
J403
TER
MIN
AL
Boa
rd(R
N60
62-0
5*)
TER
MIN
AL
BA
SEB
oard
(RN
6062
-06*
)
CA
,RN
6062
-02*
J603
J604
J601
J603
J604
J601
Up
to 1
0 te
rmin
al B
ase
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GL820-UM-251-9370 7-2
7. BLOCK DIAGRAM
7.2 Main Control Block
BA
T1
Seco
ndar
y ci
rcui
t
Mai
n C
ontro
l Blo
ck
Mai
n C
ontro
l Boa
rdR
N81
13-0
1*
J3
J4
LCD
1
FLA
SH W
RIT
E
J5
LCD
FFC
BL
J7USB
(to F
LASH
MEM
OR
Y)
J8J9
USB
LAN
(to P
C)
J203
J13
AM
P B
oard
RN
8113
-02*
J204
Logi
c &
Ala
rm &
Pul
se &
Ext
-Trig
J2
FPG
A W
RIT
E
![Page 59: midi LOGGER - User Equip: New & Used Test Equipmentuserequip.com/files/specs/5622/GL820UM25102_SERVICE MANUAL.pdf · midi LOGGER by Graphtec service personnel and other ... 20 Ch](https://reader031.vdocuments.mx/reader031/viewer/2022030508/5ab78df47f8b9ad3038bbbc9/html5/thumbnails/59.jpg)
GL820-UM-251-9370 7-3
7. BLOCK DIAGRAM
7.3 AMP BlockA
MP
Blo
ck
J504
J501
(RN
6062
-05*
)Te
rmin
al B
oard
Sign
al In
put C
ircui
t
(RN
6062
-04*
)Te
rmin
al B
oard
Sign
al In
put C
ircui
tTo
Mai
n C
ontro
l
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
tSe
cond
ary
Circ
uit
Am
p B
oard
(RN
8113
-02*
)Si
gnal
Inpu
t Circ
uit
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
t
Sign
al In
put C
ircui
t
- 1ch
- 2ch
- 19c
h
- 20c
h
J504
+ 1c
h
+ 2c
h
+ 19
ch
+ 20
ch
J505
J502
J402
J403
J201
J401
J203J13
(RN
8113
-01*
)
b 1c
h
b 2c
h
b 19
ch
b 20
ch
![Page 60: midi LOGGER - User Equip: New & Used Test Equipmentuserequip.com/files/specs/5622/GL820UM25102_SERVICE MANUAL.pdf · midi LOGGER by Graphtec service personnel and other ... 20 Ch](https://reader031.vdocuments.mx/reader031/viewer/2022030508/5ab78df47f8b9ad3038bbbc9/html5/thumbnails/60.jpg)
GL820-UM-251-9370 7-4
7. BLOCK DIAGRAM
7.3 Details of the AMP
Det
ails
of A
MP
Sign
al In
put C
ircui
t
Sign
al In
put
Tem
pera
ture
Sen
sor
Phot
o M
OS
Rel
ay
Con
stan
t Cur
rent
1m
A
Atte
nuat
orSe
lect
or
Sele
ctor
AMP
AMP
AMP
AMP
AMP
AMP
A/D
TLP1
13
DC
±5V
DC
+5V
DC
+24V
AMP
DC/D
CAI
C166
0CS
DC/
DC
DCP
0105
05BP
-U
Isol
atin
g
Isol
atin
g
Dec
oder
+ - b + - b
Term
inal
Boa
rd(R
N60
62-0
6*)
(RN
6062
-04*
)
(RN
8113
-02*
)
Rel
ay B
oard
AM
P B
oard
Seco
ndar
y C
ircui
t
Mai
n C
ontro
l Boa
rd(R
N81
13-0
1*)
AC
Ada
ptor
Phot
ocou
pler