SEC POWERMETER

[ SHAFT HORSEPOWER METER]

FLVISHED PLAN I

SHIP BUILDER Shin Kurushima Dockyard Co.,Ltd. Ohnishi Works

HULL NUMBER 5138 I SHAFT DIAMETER I 460 mm¢

M/E OUTPUT 9, 480 kW (12,890 PS) X 127 min-I at lvI.C.R.

NAME OF SHIP

• SHOYO ENGINEERING CO.,LTD

1-10-1, Ohgami, Ayase City Kanagawa 252-1104 Japan

June 7, 2002 Phone:+81-467-70-3601 Fax: +81-467-70-3605

e-mail: office@shoyo-e.co.jp

SPECIFICATION OF SEC POWERMETER (TORS ION METER)

[I] Principle of MeasuremenL

1. 1 Torsion Sensor, SEIU

The sensor lIsed for the "SEC" POWEI<METER detects microscopic torsion of the shaf1 through the change in v i bra t i on frequency of amorphous alloy sensor s tri p.

The hasic principle of torsion sensor is that the change in vibration frequency of a sLc8tched elastic suip depends Oil tension in the strip. In practice, an amorphous alloy strip is stretched between 2 supporting blocks and two sets of electrCllllagnets are located closely to the strip. One of these electromagnets is all exc i l er and anothe r is a pick-up. When the sensor stri pis caused to osc i 11 ate by electromagnet, it vibrates at iLs natural frequency, which is dependent on tension in the strips as the formula mentioned helow.

If a displacemenl IS induced in the Lorsion detector rings on which the sensor is mounted, the distance between two supporting blocks will be changed. Accordingly,

tension ill the strip and its vibration frequency also wi 1 1 be changed. Thus, the change in vibration frequency of the sensor is a measure of the strain or stress appl ied to the sensor. Actually, the vibration frequency (Hz) is proportional to square root of tension "'1''', the square of vibration frequency (IIz2) is proportional to the displacement.

The calibration constant, the relationship displacement and the change in square of vibration frequency of every sensor is individually determined in unit of cm/ liz" before de 1 i very. For i JJstafJce, call bra ti on cons tan ( of a sensor is given as O. 587 >< 10-1 cm/ IIz2.

Anlorphous Alloy Strip Vibration Formula (III mJl.II'J:IIIIIY IIIII1

Wher·e:

f

T

fJ

m, n a , b

=

'" -

=

=

Vibration Frequency(Hz)

Tension in Strip Density of Strip Integer Constants

Strip Length and WidLh

'AII.III:,TIIII CPllllllf

* SHOYO ENGINEERING CO.. LID.

- 2-

1.2 Torsion Detector Ring

The torsion detector ring convrises of two sets of split rings and data transmission system. The split rings are clamped on the shaft independently at a distance of 70mm and two torsion sensors are mounted across the fitting blocks of both rings.

When a torsional moment is applied to a shaft, the positional change between two rings causes to change the tension of sensor strip. Hence the amount of torque applied is obtainable through the change in sensor frequency and some constant values such as calibration constant of sensor, diameter and modulus of elasticity of the shaft and so fortb.

The amorphous alloy strip used in the sensor has a negative temperature characteristic, -0.3Hz/oC and the centrifugal force increases vibrating frequency. In order to eliminate these errors, two sensors are provided in the same posi t ion but in opposi te frequency response - frequency of sensor 1 increases and sensor 2 decreases against forwarding torque.

Since the variance of temperature and centrifugal force give the same amount of positive and negative error to sensor" 1" and "2" respectively, the error included will be cancell ed by averaging the frequency changes of two sensors.

The sensor signals are modulated by transmitter units and transferred to receiving antenna wi thout contact by transmi t ter uni ts. For the power supply to transmi tter uni ts, a contactless power supply unit is provided facing to the torsion detector ring. The electromotive power generated between this primary coil unit and secondary coil wound inside torsion detector ring is boosted and rectified to D.C. 8 volt.

The shaft speed is calculated by counting the pulse signals, which is generated by proximity switch located on power supply unit. And one detecting plate mounted on the ring.

OUTLINE OF TORSION DETECTOI~

SHAFT SPEED / DETECTOII

CONTACTLESS / POWER SUPPLY UNIT

(PIUMARRY COIL)

* SHOYO ENGINEERING CO._ LID.

- 3 -

-------_.-------------------------------------------------------------------------------, 1. 3 Digital Computing Uni!LSE102E

The computat ion is performed by an 8-b i t micro processor unit. The squares of two sensor signals (Hz~), shaft speed signal, K value and zero point are substituted to the formula mentioned below to calculate shaft horsepower, shaft speed and torque. K value is a constant to be set in advance using keyboard and zero point is determined by auto zero poin L scanning func ti OIl.

Since sensor signals and shaft speed signal are integrated for 5 seconds, then applied to calculation formul~ measured values are updated every 5 seconds. For indication, a 4-digit dual L.E.D. display unit with dimmer and selector switch is provided. lipper display unit indicates shaft horsepower constantly and the lower is for selective indications of shaft speed, torque and average shaft horsepower.

Shaft Horsepower Averaging Function Th i s function stores shaft horsepower data obtained every 5 seconds for a speci fied time and calculates running average. The time for averaging is programmable between 1 and 240 minutes at the increment of 1 minute to a preset switch.

Auto Zero Point Scanning Function lbis function automatically determines actual zero point (neutral point of torque) by mean sensor data (JizZ) while slow turning the shaft ahead and astern each (lne rotation in order to cancel static torque caused by friction at stern tube seal and inLermediate bearings.

[2J formula for_Shaft Horsepower

SlIP (kW) = JJCIIl - ZJ.21JZ2 - Ol2) } x K x RPM x O. '7355

where: CIll Zl

CII2 Z2

Zero

= { (CHl- C1I2) + (Z2 - Z1) »dV2 x HPM x O. 735f)

={ (ClI1-CII2)+ZElW}xK/2xRPMxO. 7355

::; Data of senor 1 under load (Hz2)

iJata of senor under no load (Hz2) Data of senor 2 under load (HZl)

Data of senor 2 under no load (Hz2)

::; Zero point ::; (ZZ-Zl)

K ::; Calculation constant O. 7355 ::; PS-+kW conversion constant

G x Ip Cons Lant K = x Cm

R x S x 7H:i20

where: I p Polar momen t of inert ia of the shaft, 1, f)1/32

G ::; Shear modulus of elasticity of shaft R Distance between sensor strip and shaft center S Measuring span of detector ring

ern Mean ctdibration constant of torsion sensors 71620 ::; Torque -7 horsepower conversion constant

SUPPLY SCOPE OF "SEC" POWERMETER. STATIONARY MODEL

Ship builder Hull Number Name of Ship Main Engine Engine Output Shaft Diameter

Shin Kurushima Dockyard Co., Ltd 5138

6S50MC-C 9,480 kW x 127 min-1 460 mm ¢

1. Torsion Detector Ring. Type SE140 1 Set Including 2 Torsion Sensors for working & Signal Transmission System Measuring Span "S" 70 mm Applicable Shaft Diameter 460 mm ¢

Sensor Signal Carrier Frequency Channel 1 = 2.000 KHz Channel 2 = 2.457 KHz

Output Power Carrier Perforations on Transmission Antenna Net Weight Quantity

2. Contact-less Power Supply Unit 1 Set Including Receiving Antenna & Shaft Speed Pick-Up Net Weight Quantity

3. Digital Computing Unit. Type SE 102E

30mW 60 46 kg 1 set

11 kg 1 set

Flush Mounting on Control Console, with built-in Dimmer Control Indication of Dual L.E.D. Display Unit

1. Shaft Horsepower 0- kW 2. Shaft Speed, 0- min -1 3. Shaft Torque, 0- kNm 4. Shaft Horsepower Average, kW (Running Average)

( Items 2 - 4 are selective indications) Signal Output by DC.4-20mA

Horsepower Horsepower auto average Net Weight Quantity

4.Standard Spare years For Computing Unit, Type SE102 1. Glass Tube Fuse, 2 Ampere

5.Power Supply Voltage : AC 100V ±10% Frequency : 60Hz ±15%

6.Power Consumption Contact-less power supply Unit Data Processing Unit SE102

7.Gurantee Total

750VA 60VA

810VA

0-10,500 kW 1 - 240 minutes

3.2 kg 1 set

5 pcs

The manufacture shall guarantee the equipment against damage and failure due to defect in design, materials and workmanship for one year after the ship's delivery to the owner. If such damage or failure should occur within that period, manufacturer sholud repair or replace defective parts free of charge.

-5-

SHIP No. SPARE PARTS LIST FOR U S E SETS PER VESSEL

r-------

Ship Performance Monitor Shaft Horsepower Meter one set

--QUANTITY REMARKS

ITEM NAME OF o U T L I f\l E WORKING No. PART PER PER SPARE .

Weigh t( kg)\ SET VESS

,;0-20 "I Glass Tube Fuse 2Ampere JJ 1 -1 5 For Computing Unit

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PRIMARY COIL

RECEIVING ANTENNA,

SHAr-T SPEED DETECTOR

SECONDARY COIL

SENSOR I

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DIGITAL COMPUTING UN!T,SE102E ____ -.1.-__ _

~ ~ TRANSMISSION U - ANTENNA

COMPUTER UNIT

8bit

MEMORY UNIT

SHP SHP A~G.

DUAl RPM LED DISPLAY TORQUE

D-A

--v CONVERTER (4-20 mA)

I DATA LOGGER I

TiTLE POWERMETER SYSTEM BLOCK DIAGRAM

DATE Oct.1,2001 I DRAWING No. I

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5138BLK102E .... SHOYO ENGINEERING CO., L TO . ..,

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TITLE

DATE ... ..,

Cable Gland 15c Cable Gland 20b Cable Gland 20c

CONT ACTLESS POWER SUPPLY UNIT

6 5 4 3 2

TERMINAL CONNECTION

POWERMETER SYSTEM WIRING DIAGRAM

Oct.22,2001 I DRAWING No. 15138Wrg102E

SHOYO ENGINEERING CO., LID .

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AC100V

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TORSION DETECTOR RIr\lG

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DESCRIPTION

CD SENSOR SIGNAL(RG-12/U)

Q) SHAFT SPEED SIGNAL(TPYCS-1.25)

G) A.C. POWER SUPPLY

@ A.C. POWER SUPPLY

® SIGNAL I~PUT OF DATA LOGER

® A.C. POWER INPUT 5m.

(]) SHAFT SPEED SIGNAL INPUT 5m.

® SENSOR SIGNAL INPUT 5m.

® ANALOG SIGNAL OUTPUT 5m.

SUPPLIER

DOCKYARD

DOCKYARD

DOCKYARD

DOCKYARD

DOCKYARD

SHOYO

SHOYO

SHOYO

SHOYO

~---------------- 138 -----------------1

o o SEC POWERMETER

ISHP INST. I

ISHAFT REV.I -[ ,-, ~ .~ Imin' I ITORQUE I ~. f I fIt II I I ISHP AVRG.j L t' If L G J! Ii kNm . . J!~ '-C f,.,~f j x10kWI

, / 168

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o I PAINTING COLOR I Munsell N8/

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TITLE SEC POWERMETER SYSTEM COMPUTING UNIT,SE102E

D A T A SEPT. 1999 I DRAWING No.1 SE102E

• SHOVO ENGINEERING CO.t L Tn.

SERVICE SPACE

70 I I

1

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TITLE POWERMETER SYSTEM TOSION DETECTOR RING

DATA SEPT. 1999 I DRAWING No.1 MME43110

...... SHOVe> ENGINEERING CO' 5 L ro. W"

TANK TOP ~

m~~less~~~~Ylliit~ __________ ~~====~_~_~~~ @ Shaft Speed Pick-Up "'.

(] Transmi tter Uni t "'",

@ Power Supply Uni t ~

~ ~) Torsion Sensors (2 pes) n

@ Secondary Coil

OJ Transmi tter Antenna

C§:) Receiving Antenna

\

I SHAFT DIAMETER ! 460 mm¢ I

o n (j)

1----------0 760

----,-------~ ------------------------------------------------------------------,----------------~

(370)

120

Photo I I

(-~

Offset 6 mm both side, adjust to the position of transmitter antenna by replacing screws "

Luminous (Diode

(Neon Lamp

Core of Primary Coil

/

I Weight 111.1 kgl

(177)

(130)

Receiving Antenna

I PAINTING = Munsell 1083/5 I

TI TLE SEC POWERMETER SYSTEM POWER SUPPLY UNIT

(225)

0

215

DATE I OCT.22.2001 DRAWING No. 5138DENJ1R

~------------171------------~ * SHOYO ENGINEERING CO.~ LTD.

Terminal Box i/'

Cable Glands

15c x 1 20b x 1 20c x 1

0

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N

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/ L-I \1 \

I SHAFT DIAMETER I 460 mm¢

±3 550

320 ±3

45

I/~\ ----Imf------,\ I \ ~ ) II

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190x180x9

190 / 75x75x9

j

Port or starboard, an y side of the shaft

I T (I be arranged by dockyard I 118

MOUNTING BRACKET FOR TITLE CONTACTLESS POWER SUPPLY UNIT

DATA SEPT. 1999 DRAWING No. MME8004-N

.., SHOYO ENGINEERING CO., L TO. I t----180-~

~----------------,-------------------------------------,----,---------------------------------,

/

SEC POWERMETER

PERFORMANCE MON I·TOR

INSTRUCTION MANUAL

* SHOYO ENGINEERING CO., LTD

l-lO-l,Ohgami,Ayase City Kanagawa 252-1104 japan

Phone (0467) 70 - 3601

Fax: (0467) 70 - 3605

I

INSTRUCTION MANUAL OF POWERMETER, STATIONARY MODEL

I N D E X

Operational Manual of Computing Unit, Model SEI02E

[1J Normal Measurement Position

[2J Setting of Calculation Factors

[3J Indication of Calculation Factor

[4] Calculation of "Kif Value K Value Calculation Sheet Calibration Certificates

[5J Indication of Torsion Sensor Signal

[6J Auto Zero Point Scanning

[7] Shaft Horsepower Averaging Function

[8J Trouble Shooting - Self Check Mode

Appendix 1 Zero Determination of SEC Powermeter

I SHOYO ENGINEERING CO.,L TO.

1

2

2

3 4 5

3

6

7

8

9

I

I

OPERATIONAL MANUAL OF CUWlITING UNIT, TYPE SE102E

The computation of digi tal computing uni t, SE102E is performed by an 8-bit microcomputer. The "K" value and zero point in memory, squares of 2 sensor Signal and shaft speed signal are transferred to microcomputer to calculate Shaft horsepower, torque and shaft speed. For the indication, a dual L.E.D. display unit is provided. The upper indicates shaft horse power constantly, and the lower is selective indicator for shaft speed, shaft torque and average shaft horsepower.

[lJ Normal Measuring Position When power on, measurement is automatically commenced and the indication is updated every 5 seconds. The ini tial posi tion of lower display uni t is shaft speed, change it if necessary by pressing display control key CD. The indication is switched one by one by pressing display control.key to Torque, to average shaft horsepower, then return to first position shaft Speed. At each positions, necessary lighting index are illuminated.

The average shaft horsepower is [running average] of preset time between 1 and 240 minutes. The indicator lamp of average reset key GD is turned on when average reaches to the time preset. Refer to page 7 for details.

It is necessary to preset three factors for calculation, K/2 value, zero point and average time. Refer to following sections for the details how to set or how to control.

Example of Normal Measuring Position Shaft horsepower 3906 X lOkWand shaft speed 100. 0 rpm are displayed. Press display control key CD to select the indication at lower display. The lamps on control swi tches, • means lighting on and 0 lighting off. Adjust the brightness of indicators by dimmer controller ~.

--~--------------~--------~-~-.-(I (I ----.-.------~---------.

r

SEC POWERh.1ETE.F

.-----------~--.---------.---~.

,l--, [xl0kW] _ .. i ' __ .'

- - --~J Illilil~ 1 LI LI. L_I [xlOkWf

----~----------------.--.------

'Fr!]'OD "1m' C<Rl Q)

DOG

(J SHore) E:.~IC;II·IE:ERli,C; CO .. L TlI ('J

I I-I I-I I-IIIDLJ I Li L.I.(~I

1. _____________ . ____ .

01] r~-'iL--=:J---_--=~/::: ~~--E-I -~-'-Ok;

irfOROUE:=] L~I -;

~'N5T I ~/-;~~!=/ /~I ~ , ... '" _/ - - - ~

I • SHOYO ENGINEERING CO.,L TO. I 1

I

[2J Setting of Calculation Factors This uni t stores 4 kinds of factor which is necessary for measurement to memory. The factors stored in memory are maintained even after power off unless otherwise wri tten over. In order to set factors, hold down control key CD and press factor key @ so that upper display indicates K value with a figure 01 at lower display. At this condition, the top of upper figure flickers to show it is setting mode now.

Use figure keys to input K value, for instance to input 3956, press keys as 3 9 5 6 so that flickering returns to the top. Confirm the figure and if any errot, repeat the same steps to write it over. If no error, press factor key GD only to input next one zero point.

At zero point setting, figure 02 is indicted at the lower display. Change it if necessary, but zero point is determined and memorized by auto zero scanning mode. Changing zero point is required only for functional check, press factor key GD only to pass this item. Next setting is average time with 03 at the lower. Set the time to average shaft horsepower between 1 and 240 minutes at the increments of 1 minute. In addition, press factor key GD, indicated the time zero scanning wi th 04 at the lower. Set the time for one rotation by turning gear with second.

After all inputs, hold control Key CD down and press factor key GD to store The figures to memory. The display unit is turned to normal position.

[3J Indication of Calculation Factors To indicate the factors in memory, press factor key only so that upper display indicates K value wi th 01 at the lower. The indication is changed one by one by pressing factor key GD to Zero Point (02) - Average Time (03) - Time Zero Scanning (04)then returns to K value (01) again. To return to measuring posi tion, press figure key 0 (zero). This indication is for observation only, changing any factor is impossible. Refer to section 2 above to change the factor. Example of Setting Factors

Hold control key CD down and press factor key GD for setting, so that the top digi t flickers wi th an item number at the lower. Press only factor key to select next item, or hold control key down and press factor key to finish. To observe them without setting, press factor key only at normal position (press figure key zero[OJ to finish).

-------~~.~--

Ll 0 SEC POWERME1ER

--~---I -~---~-~

, ------------------

'B'O 'mr eme

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(') SHOYO EfIGlfIEERlf'-IG CO ,LTD C) ~ ----=::::.....-~---------------"-.----.-~--~--

I * SHOYO ENGINEERING CO.,L TO. I 2

[4J Calculation of "K" Value Next two pages are K value calculation sheet and calibration certificates of torsion sensor and detector ring equipped. The half of K value is set by us during installation. The K/2 is a constant value, not to be changed unless otherwise torsion sensor or detector ring is replaced, or for test purpose. If torsion sensor is replaced, set half of K value shown on new calculation sheet in the method shown in section 2, page 2 of this manual.

EXAMPLE Constant K = O. 12345 X 10-2 =* K/2 = O. 061725 X 10-2

Set as ~ ~ ~ ~ at K Value (01)

[5] Indication of Torsion Sensor Signal For initial tension setting of torsion sensors for functional checking, this unit indicates sensor signal frequency in Hz and square of frequency (Hz2)

At normal position, push sensor key CD so that squares of 2 torsion sensor signals (x 102) are displayed and updated every 5 seconds. The indication at upper display is sensor No.1 and the lower is sensor No.2.

To indicate signal frequency(Hz), press sensor key again then indication is turned to frequency(Hz) and updated everyone second. Select Hz20r Hz by pressing sensor key CD in turn. To finish signal indication and return to normal position, press figure key zero[OJ.

Example of Sensor Signal Indication Sensor signal 552 Hz and 498 Hz are indicated. Select Hz2 or Hz by Pressing sensor key CD. The upper indication is sensor No.1 and the Lower is sensor No.2. Press figure key zero[OJ to return to normal Position.

SE POWERIv1ETER

~--------------~, 'I'

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~ CJ ._~HOYO EHGlf·JEERING CO.~L TO. ()

I~ORMAL POSITIOI~

""'''' I J 0,

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_______ ~_J

01l DIJ Hz -,. __ ._-------

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* SHOYO ENGINEERING CO.,L TO. 3

"K" VALUE CALCULATION SHEET

No. K20570

S HIP Y A R D Shin Kurushima Dockyard Co., Ltd.

NAME OF SHIP Hull No. 5138

ENGINE OUTPUT 9, 480kWX 127min-J

SHAFT DIAMETER 460 mm ¢

5~r MEASURING EQUIPMENTS

I. Torsion Detector Ring Type SE-150 Serial No. 20894

2. Torsion Sensor Type SE18(B6) Serial No. 5289 & No. 5935

CONSTANT K -GXlp

------- XCm R X S X 71620

where:

= 0.2272026 X 10~2 -. K/2= 0.1136013 X 10-"

I set 1 1 3 6 I

G = Shear Modulus of Elasticity of the Shaft = 8.37 X 10 5 kg/cm2

n (Do4- D j") lp = Polar Moment of inertia = = 439,573. 22 cm~

32 (Do: Shaft Outer Diameter = 46.00 cm)

(D i : Shaft Inner Diameter = 0.00 crn)

R = Distance of Sensing Strip from Shaft Center = 28.2 crn

S = Distance of Detector Rings (Measuring Span) = 7.00 crn

Crn = Mean Cal ibration Constant of Sensors - 0.8715 X 1O~7crn/Hz2

71620 = Torque ---. Horsepower Conversion Constant

CALIBRATION CONSTANTS OF TORSION SENSORS

1. Channell: No. 5289 = 0.871 X 107cm/Hz2

2. Channel 2: No. 5935 = 0.872 X 1O~7cm/Hz"

Jun. 07, 2002 • S HOY 0 ENG I NEE R I N G CO .• LTD. 4

SEC POWERMETER

CALIBRATION CERTIFICATE No. K20570

Date .Iun.Ol,2002

Custmer: Shin Kurushima Dockyard Co.,Ltd.

Hull No. 5138

Instrument: Description:

"R" = Distance of Sensing Strip from Shaft Center

"s" = Distance between Detector F<ing (Measuring Span)

Torsion Detector RiflE "0" = Inside Diameter

Type Serial No. Calibration Constant / Date·

SE-150 20894 [For Torsion] "R" = 28. 15 cm

"s" - 7.00cm liD" - 46. 00 cm

Chacked by,: >;; r.;r it, • SHOYO ENGINEERING CO., LTD. 5

I

[6J Auto Zero Point Scanning One of the most important factor in measurement of shaft horsepower is to determine actual zero point of shaft under no load. Owing to friction at intermediate bearings and stern tube seals, it should not be assumed that torque in the shaft is zero when main engine is standing still but rather twisted or loaded. This function determines zero point by measuring mean sensor signals (HZ2) during slow turning the shaft ahead and astern each 1 rotation.

1. Start turning gear ahead and more than 20 seconds later, push zero scan keyCD. The indicator lamp of keyCD is turned on and display unit starts flickering [OOOOJ to show zero scanning is commenced.

2. When the shaft completes one turning ahead, indicator lamp of zero scan key CD starts flickering and buzzer sounds.

3. Switch turning gear to astern and more than 20 seconds later, push zero scan key CD. The buzzer stops and astern sampling is started(Do not push key CD before changing turning direction to astern). The indication 0000 on L. E.D. display unit starts flickering again.

4. When the shaft completes one turning astern, buzzer sounds and the lamp of zero scan key flickers again. New zero point is indicated on upper display unit with a lighting index ZERO. Press zero scan key CD to store new zero point to memory. When zero scan key CD is pressed, display is returned to normal position. Stop turning gear if necessary to finish zero scanning.

Example of Zero Scanning After turning astern one rotation, indicator lamp of zero scan key is flushing and new zero point [562J is indicated on display unit with a lighting index [ZEROJ. Press zero scan key CD to store new zero point. During data sampling ahead and astern, a figure 0000 flickers.

-[~:;~~----~-.~-i-----=-~=-. ¢= r-=--=~~-·~:,;--:=:--

I ---------------

Important! I. When the turning switch is started, transient starting torque is applied

to the shaft. In order to avoid this starting torque, it is advisable to wait more than 20 seconds to press zero scan key after starting turning gear ahead or astern(Paragraphs I and 3 above).

2. Zero scanning mode is cancelled when the shaft speed is over 5.0 rpm.

I * SHOYO ENGINEERING CO.,L TO. I 6

[7J Shaft Horsepower Averaging Function

J

This unit stores shaft horsepower data sampled every 5 seconds to memory for the specified time and calculates running average. The average time is programmable between 1 through 240 minutes at the intervals of one minute.

1.Set required time for average in accordance with the procedure shown on section 2 "Setting of calculation Factors "page 2 of this manual.

2. Shaft horsepower data sampled every 5 seconds are stored to the memory sequentially and all the data are averaged and output at every sampling.

3. The next data immediately after the time preset is stored at the top of memory and the first datum is abandoned, then this data and all the fo­llowing data are averaged for next output. After the time set, therefore, running averaged covering particular time is continuously updated every sampling time.

4. When time count reaches the time preset, indicator lamp on average data reset key CD is turned on. If this indicator lamp is off, indicated data should be the average since last reset, not running average data.

5. In order to clear the memory and start new samplings, hold down control key GD and press average reset key CD .

6. When average time is changed, memory data are cleared and new sampling is commenced automatically.

Example of Average Indication Average shaft horsepower 3825 XIO kW is indicated. Because the indicator lamp of reset key CD is lighting, indicated data should be running average covering particular time. If the indicator lamp CD is off, the data should be average since last reset.

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Important ! I. After sailing out for the time preset, average value includes zero data

during mooring. In order to reset those lower data, press average reset key CD after out sailing out soonest possible.

2. The measure/check key ~ works as a reset switch, all the data in memory are lost when the lamp is turned off.

l .., SHOYO ENGINEERING CO.,L TO. 1 7

[8J Trouble Shooting - Self Check Mode

I

In the event of abnormal function, please use self check mode of computing Unit, SEl02E in the following steps.

l.At first, check the functions of computing unit itself by using standard signals generated by crystal unit instead of torsioIl sensor signals from detector ring Change calculation factors as below(Please make a memo of current factors) in the procedure shown on page 2.

01 K value 1000 02 Zero Point 0000 03 Average Torque 0001

2. Hold down control key CD and press measure/check selector key GD to start simulatory calculation. If functions of computing unit .is normal, the following data should be indicated when indicator lamp of measure/check key GD is turned on. If the indications are different or random, contact the maker for technical service.

Shaft Horsepower Shaft Speed Shaft Torque Average Horsepower

1033 100 986

1033

XlOkW rpm kN·m XlOkW

3. If above values are confirmed to show the computing unit, SE102E has no trouble, check the sensor signals. To return to normal measurement mode, hold down control key CD and press measure/check selector key GD to turn off indicator lamp.

4. If shaft horsepower and torque are abnormal, check the signal frequency of both torsion sensors(see page 3 of this manual). If sensor signal is more than 800 Hz or random value, sensor itself, or demodulator circuit inside computing unit is defective.

5.If both sensor signals are zero, contactless power supply unit or power supply unit on detector ring is abnormal. Check the lighting on of red indicator lamp at contactless power supply unit, and check the terminal connections of coaxial cable(Wiring diagram, cable No. CD).

6. If one of sensor is zero, a transmitter unit on detector ring or demodulator circuit in computing unit is defective.

7. If shaft speed is abnormal, check the position of shaft speed pick-up, i.e. light beam(invisible) is passing through the holes on antenna disc or not.

8. When ordering our technical service, please advise the results of above Checking, especially the sensor signals Frequency(Hz).

[l] 00 []] m 0 lCJl 8][]]m ~ ClRl c6 OJlIllIl ~ ~ ~ [§] 2 IUD~

I SHOYO ENGINEERING CO.,L TO. I 8

J

APPENDIX 1 Zero Determination of "SEC" Powermeter

The zero point shift of Powermeter is mainly caused by the following reason.

1. Structural deformation of torsion detector ring, applied during installation work. 2. Change of shaft alignment caused by change of main engine temperature. 3. Change of shaft alignment caused by change of draft.

The structural deformation of torsion detector ring is a transient phenomenon, which is relaxed wi thin a few weeks of voyage. After the stabilization, zero detennination should be carried out at intervals of approx. 2 to 3 months for confirmation. However, if torque indication of computing unit is exceeding over 6 ton.m when the shaft is standing still, there must be shift of zero over 10 points and actual zero point have to be determined.

The change of main engine temperature may slightly change the shaft alignment but it can be avoided if zero determination is carried out after main engine heat-up. The best opportunity to carry out zero detennination is upon entry into port.

l • SHOYO ENGINEERING CO .. L TO. I 9

Page:

POWERMETER ZERO POINT DATA SEET

No. DATE PORT ZERO VALUE SHIP CONDITION

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

20

2 1

22

23

24

2 5

26

27

28

29

30

I .., SHOYO ENGINEERING CO., L TO. J

Page:

POWERMETER ZERO POINT DATA SEET

No. DATE PORT ZERO VALUE SHIP CONDITION

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

20

2 1

22

23

24

2 5

26

27

28

29

30

I I • SHOYO ENGINEERING CO .. L TO. I

SEC POWERMETER

PERFORMANCE MONITOR

Tel: (0467) 70 - 3601

Fax: (0467) 70 - 3605

- 1 -

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No. K20570

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