tcmb 02 conditioning module

User Instructions

Copyright © 2019 Innovative Measurement Technology Ltd. | All Rights Reserved of 28

TCMB 02 Conditioning Module

Contents

SECTION ONE

Page(s)User Instructions 3Preliminary notes 4Main electrical specifications 5Dimensions 6Types of connections 7Installation and power supply 8Electrical connections (conditioner and transducer) 9 - 12Transducer Extension cables 13 - 14Check of pre-calibration 15 - 16

SECTION TWO Pages(s)

Setup instructions 17 PCB layout 18Conditioner setup 19 - 21Conditioner calibration - Zero 22 - 23Conditioner calibration - Gain 23Conditioner calibration - Zero Offset 23Setup examples 24 - 27

Specifications in this document may be changed without notice


Section one

User Instructions


Preliminary notes

The TCMB 02 Series conditioning module are compact and flexible signal conditioner based on a standard TCM conditioner and boxed into plastic housing with options for different types of input connections, output signals and supply voltages.

The TCMB 02 conditioners are assembled and wired for use with Half Bridge inductive transducers and can also be supplied on request pre-adjusted (*) for use with specific types of 3TLX Series gauging transducers.

(*) Please note that a fine adjustment to be carried out by the customer may be required at the time of installation (see detalis on the following pages).

Environmental protection

The TCMB 02 conditioners (all versions) must be used in a dry environment and are not suitable for use in harsh environments with presence of high humidity / moisture. They must also be protected against contact with liquids and dust, especially if conductive or corrosive.

Temperature range from 0 °C to +50 °C (operating and storage).

Warm up

The TCMB 02 conditioners are precision modules and need approximately 15 minute warm up time to ensure stable measurement.


Main electrical specifications

Power Supply Min Typical Max Units

Optional power supplies

A) 5 5.2 5.5 B) 11.8 12 12.5

23.8 24.2 24.7 ± 14.5 ± 15 ± 18

Volt @ 120 mA Volt @ 65 mA Volt @ 25 mA Volt @ ± 25 mA

Selectable Options

kHz ±10%

2.2 V rms - Typical all frequencies 5.0 V rms - Typical all frequencies

C) D)

Transducer

Primary

Frequency

Amplitude (1) Amplitude (2)

Conditioning Min Typical Max Units

-11 +11 V dc Span

Zero Offset -100% 0 +100%


2 3 5 10 13

6

Dimensions in mm (drawings not to scale)

106

4,0

13

45

45

23

DIN rail mount option

Top view

Side view

66

45

Front view

Side view

3


7

Available types of electrical connections (drawings not to scale)

Transducer input socket on front side end Supply and Output - 1 m cable

-TCMB 02-1S - no DIN rail mount

TCMB 02-1A - DIN rail mount option

Supply and Output - 1 m cable

Supply and Output - 1 m cable

Transducer input Panel mount socket - with max. 10 m cable

Transducer input Flying socket - with max. 10 m cable

TCMB 02-2S - no DIN rail mount


TCMB 02-3S - no DIN rail mount



8

Installation and power supply

Make sure that the TCMB 02 is disconnected from any supply voltage during installation. Apply power only after all electrical connections are made between :

- TCMB 02 module and transducer- output from TCMB 02 and instrument or digital display.

For the supply of the TCMB 02 modules a regulated linear power supply is required (do not use switching-mode units).

Max. ripple 10 mV p.p. - @ 24 V output.

For a correct operation of the TCMB 02 module use a dedicated power supply that does not supply any other electronic equipment. When supplying the TCMB 02 make sure the correct value of output voltage from the power supply and the correct polarity of connection.

All TCMB 02 modules (all versions and styles) :

• are reverse polarity protected (power supply)• are not overvoltage protected (power supply)• are not short circuit protected (output signal)


9

Electrical connections - Power supply and Output signal

Colour code of Supply and Output cable

Description Cable colours

GND +VE0 V

= power supply return = power supply = output signal return

V OUT = output signal

0 V+24 V or +12 V or +5 V0 V±5 V or ±10 V or 0-10 V f.s.

blue red

green yellow

Supply and Output cable - 1 metre long (longer cables on request)

DBH2

L 2

L 1

DC

-DC

CO

NVE

RTE

R

xx15

S

0 / V

+VE

V OUT

S2

GND

TP3

FVout

0 V

+24 V

0 V

±5 V ( ±10 V) or 0-10 V f.s.

Power supply

Output signal


10

Power supply

The current versions of TCMB 02 conditioners differ from earlier versions they now have both Power supply return (GND) and Output return (0/V) electrically connected together through a solder bridge on link L2 on PCB.

If this link causes any operational defect to the equipment connected to the TCMB 02, please remove the bridge across the two pads.


11

Electrical connections - Transducer connection

2

3

4

1

2

3

4

1

5

DBH4

P

3w3w f1

v2f2f3

4w 4w

4w

3w

DBH3

TP1TP2

10k2k P

P

Energization

Output

Energization

Screen

PCB - unpopulated side

1

3

5

PCB - populated side

Not connected

IC 1 AD698AP

DBH1

Half Bridge


12

Electrical connections - Transducer plug connections and colour code

Grey

Black

( 3 )

( 5 )

Screen ( 2 )( 1 )

Red

3TLX10…3TLX50 Standard PUR cable

Screen ( 2 ) ( 1 )

Green

( 3 ) White

( 5 ) Brown

3TLX10…3TLX50 Halogen free cable

Cable screen of 3TLX10…3TLX50 Series transducers is connected to the transducer body and to pin 2 of plug.

1 5

3 4 2

5 pin round plug - solder side view

Blue

( 3 ) Yellow

( 5 )

Screen ( * )( 1 )

Red

3TLX100 - Standard PUR cable

(*) Cable screen of 3TLX100 transducers is connected to the transducer body and to case of plug.


13

Electrical connections - Transducer extension cables

Conditioners TCMB 02-1S and TCMB 02-1A can be supplied on request with one of the T100/7xx extension screened cables for remote connection of transducers (max. length 10 metres). The electrical connections of the T100/7xx extension screened cables are available only for the 3TLX10…3TLX50 Series transducers

Extension cables are wired for INCREASING output signal.

T100/781 T100/782 T100/787 T100/790

= length 1 metre = length 2.5 metres = length 7.5 metres = length 10 metres

max. 10 m

Transducer side connection 5 pin flying

socket

Extension cable - T100/7xx

TCMB 02 side connection 5 pin flying

plug


14

Recommendation for the extension of the transducer cable

In general, the distance between a 3TLX Series transducer and its conditioning unit shouldn’t exceed the standard 2 metre length of its cable. If an extension of the transducer cable is required, the overall length cannot exceed 12 metres : 2 metres for the transducer cable + max 10 metres for the extension cable. This extension must be made with an original cable, available on request in different lengths up to 10 metres, The use of the original manufacturer’s extension cable cannot guarantee the best performance and is essential to reduce as much as possible to the actual required length necessary. Avoid running cable parallel to power lines. Position the cable away from electrical machines or noise sources that may interfere with the 12 kHz transducer signal transmitted along the transducer cable. Do not place the transducer cable inside pipes or sleeves containing other electrical conductors. As the transducer performance may be affected by an to excessive length of its cable it is essential to test the application for a correct evaluation.


15

Check of correct calibration of conditioners delivered with an associated transducer (full measuring system)

Although each TCMB 02 conditioner may be delivered on request configured and pre-adjusted for use with a specific transducer of the 3TLX Series models, it is recommended to check its calibration (accuracy of measurement) after installation. If an “on site” adjustment is required, this can be carried out by the customer referring to the setup procedure described in the setup instructions (section two of this manual). Each conditioner is pre-adjusted in association with a specific transducer (model and serial number), but if a fine adjustment is required, this will compensate any error that might have been introduced by placement of the transducer at the time of its installation and/or to compensate any possibile variation in the system calibration due to operating conditions that could not be simulated in our laboratory during the pre-adjustment operations :

for instance :

- environmental conditions (temperature, etc.)- presence of electrical or electromagnetic noise or interferences- conditioner supply (if not correctly regulated and filtered )- interaction with equipments connected to the conditioner output


16

TCMB 02 conditioner delivered as a spare part (without transducer)

In this case the conditioner will be delivered on request configured and pre-adjusted in association with a sample 3TLX Series transducer from stock. The sample transducer used for the conditioner setup will be of the same model of that which will be used by the customer. Also in this case it is recommended to check the correct calibration of the conditioner after its installation.

Replacement of a 3TLX Series transducer

In most cases the replacement of a faulty 3TLX Series transducer with a new one of the same type does not require recalibration of its conditioner. This is because during factory calibration, the sensitivity of each transducer of the same type is attenuated to a specific value, within tight tolerance, in order to standardise the output of all transducers and reduce the measurement error introduced by the replacement of the transducer. This error is generally accepted by industry, and unless the application requires very accurate measurements, fine recalibration of the conditioner is not necessary. It is recommended to check the correct calibration of the conditioner after replacement of the faulty transducer.

As a general rule, if after replacement of a faulty transducer fine recalibration of the conditioner is required, this is to compensate any possible measurement error introduced by :

- non-accurate positioning of the new transducer during installation onits fixture

- possible non-simmetry between positive and negative stroke of thenew transducer

- different sensitivity between faulty transducer and replacementtransducer


17 Copyright © 2019 Innovative Measurement Technology Ltd. | All Rights Reserved of 28

Section two

TCM - Setup Instructions

18

PCB - Printed circuit board layout (drawings not to scale)

DBH4

DBH1 DBH3

GAIN

P 2

OFFSET

P 1

DBH2

DC

-DC

CO

NVE

RTE

R

xx15

S

L 2

L 1

IC 1 AD698AP

P

TP1TP2

10k2k P

P

0 / V

+VE

V OUT

S2

GND

TP3

FVout

4w 4w

2

3

4

1

4w

3wP

+

4w 4w 3w 3w f1 f2 f3 v2

Coarse Gain (span) Fine Gain (span)

_

Half Bridge Load, 2k or 10k TP1 available for shorting the LVDT output to determine TCM zero TP2 available for shorting the Half Bridge to determine TCM zero Note : Always position link in park position P (as shown) after setting TCM zero

3 kHz frequency 5 kHz frequency (used mainly for LVDT) 10 kHz frequency (used mainly for Half Bridge) With link in park position P (as shown) default is 13 kHz Primary 5 V rms energising

Coarse Zero Offset Fine Zero Offset

Handbag position for 3 wire Half Bridge transducers


19

Conditioner Setup

Before calibration, the TCM conditioner must be configured in accordance to the type of transducer to be connected (Half Bridge or LVDT) and the requested output signal.

This is carried out using the following 4 handbag links :

Handbag link DBH1 - Coarse Gain selection

Handbag link DBH2 - Coarse Offset selection

Handbag link DBH3 Link to simulate transducer at its centre stroke (yellow handbag link) Demodulator load selection (green handbag link)

Handbag link DBH4 Transducer type selection : Half Bridge or LVDT (2 black handbag links) Transducer energizing voltage and frequency selection (1 or 2 blue handbag links)


20

Conditioner Setup

Make sure the TCM is disconnected from any supply voltage. Following the manufacturer’s transducer information, wire the transducer according to the type of device, by either soldering to the appropriate pads or plug in to the optional in-line socket.

1. Transducer type, Energizing frequency and Enerigizing voltage

Position the handbag links on DBH4 to suit the type of transducer being used (Half Bridge or LVDT ), making sure the correct frequency and supply voltage are selected. The supply frequency of 5 kHz is mainly used for LVDT transducers. The supply frequencies of 10 or 13 kHz are mainly used for Half Bridge transducers. Select also the appropriate supply voltage of the transducer (2.2 V or 5 V).

DBH4

4w 4w3w 3w f1 f2

P

HALF BRIDGE transducers - position handbag links on 3w

LVDT transducers - position handbag links on 4w

f3 v2

3 kHz frequency - position handbag link on f1 5 kHz frequency - position handbag link on f2 10 kHz frequency - position handbag link on f3 13 kHz frequency - position handbag link on park position P

2 kHz frequency - position handbag links on f1 + f2

2.2 V voltage - position handbag link on park position P 5 V voltage - position handbag link on v2


21

2. Calibration load

Select the correct calibration load, as shown below (DBH3 handbag link). 2 kOhm or 10 kOhm is mainly used for Half Bridge transducers (check the correct value of calibration load in the transducer data sheet). For LVDT transducers position the green handbag link in park position P and check that the transducer linearity is not affected.

DBH3

Half Bridge transducers - select 2k or 10 kOhm Load (gree n handbag link)

LVDT transducers - Green handbag link in park position P ( this may affect the LVDT, resulting in non-linear output)

TP1TP2

2k10k

P

TP1TP2

2k10k

P

TP1TP2

2k10k

P

PPP

2 kOhm 10 kOhm LVDT


22

3. Conditioner calibration

For a correct calibration of the conditioner, the TCM must be first set for electrical zero. Fit the Coarse Offset handbag link DBH2 to the centre (park) position P.

Short the output from the transducer fitting the yellow handbag link of DBH3 to TP2 position for Half Bridge transducers (3w), or to TP1 position for LVDT transducers (4w). This simulates the transducer at electrical zero positions.

DBH2

Coarse Zero

PHan dbag link in park position P

LVDT transducer - handbag link in TP1 position Half Bridge transducer - handbag link in TP2 position

DBH3

4w - LVDT3w - 1/2 Ponte

TP1TP2

P

P

Half Bridge

TP1TP2

P4w - LVDT3w - 1/2 Ponte

P

LVDT

TP1TP2

P

P

Pos. P


23

Connect the DC supply voltage and measuring instrument, checking the correct polarity, and adjust the Fine Zero (Offset) control P1 to achieve zero DC volts. Remove the TP yellow handbag link and place in a park (P) position.

Gain (Span)

Set the transducer to its mechanical (electrical) zero position, then with the core adjusted to its required stroke, fit the Coarse Gain handbag link DBH1 to a position that produces the nearest required result e.g. 10.00 V then adjust the Fine Gain control P2 for final setting.

Zero Offset (if needed)

With the transducer at its desired stroke (i.e. -5 mm) for zero volts, fit the Coarse Offset handbag link DBH2 to a position closest to zero volts adjusting the Fine Offset control P1 for final setting. Position the transducer to the other end of its stroke (i.e. +5 mm) and adjust Gain controls for required voltage e.g. +10.00 V on the measuring instrument. Due to the possibility of slight interaction, please repeat the above procedure.

DBH1

Coarse gain

increase decrease + _


24

SAMPLES

1) Sample Setup for Half Bridge using no Offset and a ±10 V Increasing Output

DBH4

DBH1 DBH3

GAIN

P 2

OFFSET

P 1

DBH2

DC

-DC

CO

NVE

RTE

R

xx15

S

L 2

L 1

IC 1 AD698AP

P

3w3w f1

v2f2f3

TP1TP2

10k2k P

P

0 / V

+VE

V OUT

S2

GND

TP3

FVout

4w 4w

2

3

4

1

54w

3wP

Higher Lower

To increase or decrease the Gain (span), move this handbag left or right for coarse adjustment before final adjustment of the Gain pre-set

-10 V 0 V +10 V


25

SAMPLES

2) Sample Setup for Half Bridge using 100% Offset and a 0-10 V Increasing Output

DBH4

DBH1 DBH3

GAIN

P 2

OFFSET

P 1

DBH2

DC

-DC

CO

NVE

RTE

R

xx15

S

L 2

L 1

IC 1 AD698AP

P

3w3w f1

v2f2f3

TP1TP2

10k2k P

P

0 / V

+VE

V OUT

S2

GND

TP3

FVout

4w 4w

2

3

4

1

54w

3wP

Higher Lower


0 V +10 V


26

SAMPLES

3) Sample Setup for LVDT using no Offset and a ±10 V Increasing Output

DBH4

DBH1 DBH3

GAIN

P 2

OFFSET

P 1

DBH2

DC

-DC

CO

NVE

RTE

R

xx15

S

L 2

L 1

IC 1 AD698AP

P

4w4w f1

v2f2f3

TP1TP2

10k2k P

P

0 / V

+VE

V OUT

S2

GND

TP3

FVout

4w 4w

2

3

4

1

54w

3wP

Higher Lower


-10 V 0 V +10 V


27

SAMPLES

4) Sample Setup for LVDT using 100% Offset and a 0-10 V Increasing Output

DBH4

DBH1 DBH3

GAIN

P 2

OFFSET

P 1

DBH2

DC

-DC

CO

NVE

RTE

R

xx15

S

L 2

L 1

IC 1 AD698AP

P

4w4w f1

v2f2f3

TP1TP2

10k2k P

P

0 / V

+VE

V OUT

S2

GND

TP3

FVout

4w 4w

2

3

4

1

54w

3wP

Higher Lower


0 V +10 V



Innovative Measurement Technology Ltd

A Unit 3e Vinnetrow Business park, Vinnetrow Road, Chichester, West Sussex, PO20 1QH T +44 (0) 1243 942010E [email protected] www.innovative-measurement-technology.co.uk

tcmb 02 conditioning module

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