Ametek C Manuel utilisateur

Service Manual

Temperature Calibrators

JOFRA CTC-140/320/650 A/B, CTC-1200 A

JF INSTRUMENTS MTC-140/320/650 A

2 26-03-2004

123200 03 26-03-2004 3

List of contents

1.0 General ......................................................................................4

1.1 Introduction ................................................................................... 4

1.2 Safety instructions ........................................................................ 6

2.0 Maintenance..............................................................................7

2.1 Adjusting and calibrating the instrument....................................... 7

2.2 Caring for the instrument after use ............................................. 15

3.0 Repairs ....................................................................................17

3.1 Trouble shooting ......................................................................... 17

3.2 Replacement of spare parts ....................................................... 25

3.3 Adjusting and testing PCBs ........................................................ 33

3.3.1 CONTROLLER PCB......................................................... 33

3.3.2 POWER PCB CTC-140 A, MTC-140 A ............................ 34

3.3.3 POWER PCB CTC-320/650 A/B, CTC-1200 A, MTC-

320/650 A ......................................................................... 35

3.3.4 Testing the CONTROLLER PCB and keyboard............... 36

4.0 Spare parts and drawings .....................................................37

4.1 Spare parts - generel .................................................................. 37

4.2 List of spare parts – CTC-140 A/-RS, MTC- 140 A .................... 38

4.3 List of spare parts – CTC-320 A/-RS, MTC- 320 A .................... 40

4.4 List of spare parts – CTC-650 A/-RS, MTC- 650 A .................... 42

4.5 List of spare parts – CTC-320 B/-RS.......................................... 44

4.6 List of spare parts – CTC-650 B/-RS.......................................... 46

4.7 List of spare parts – CTC-1200 A-RS......................................... 48

4.8 Wiring diagram – CTC-140 A/-RS, MTC-140 A.......................... 50

4.9 Wiring diagram – CTC-320/650 A/-RS, MTC- 320/650 A........... 51

4.10 Wiring diagram – CTC-320 B/-RS .............................................. 52

4.11 Wiring diagram – CTC-650 B/-RS .............................................. 53

4.12 Wiring diagram – CTC-1200 A-RS ............................................. 54

4 26-03-2004 123200 03

1.0 General

1.1 Introduction

This service manual applies to the following instruments:

• Jofra CTC-140 A (with or without RS232)

• Jofra CTC-320 A (with or without RS232)

• Jofra CTC-320 B (with or without RS232)

• Jofra CTC-650 A (with or without RS232)

• Jofra CTC-650 B (with or without RS232)

• Jofra CTC-1200 A (with RS232)

• JF Instruments MTC-140 A (without RS232)

• JF Instruments MTC-320 A (without RS232)

• JF Instruments MTC-650 A (without RS232)

All calibrators are produced from quality components by skilled staff.

Each calibrator passes several tests during assembly and undergoes

a final inspection and test following a special calibration procedure

laid down by our technical staff.

Caution…

If you decide to check and/or re-calibrate the calibrator, you

must always use certified test equipment only and ensure

proper contact between the test probe and the well of the

calibrator.

Operating guidelines and technical specifications are outlined in the

reference manual order no. 123198 for CTC instruments and in the

user manual order no. 105337 for MTC instruments. Please note that

these are only available in English.

123200 03 26-03-2004 5

Technical assistance

The following information regarding testing and repair was

correct at the time of issue. Do not hesitate to contact our service

department or your local distributor, however, if you have further

queries.

Note…

Please note that we would be very interested in hearing

from you if you have any ideas or suggestions for changes

to our products.

AMETEK DENMARK A/S

Gydevang 32- 34

DK-3450 Allerød

Phone: +45 48 16 80 00

Fax: +45 48 16 80 80

6 26-03-2004 123200 03

1.2 Safety instructions

Read this manual carefully before doing

any maintenance on the instruments!

Please follow the instructions and procedures described in

this manual in order to maintain the instruments correctly

and to avoid any personal injuries and/or damage to the

instruments.

Warning

• The calibrator is designed for interior use only and

should not be used in risk-prone areas, where

vapour or gas leaks, etc. may constitute an explosives

hazard.

• Never use heat transfer fluids such as silicone, oil,

paste, etc. These fluids may penetrate the calibrator

and cause damage or create poisonous fumes.

Caution – Hot surface

This symbol is engraved in the grid plate.

• Do not touch the grid plate, the well or the insertion

tube as the calibrator is heating up – they may be very

hot.

• Do not touch the handle of the calibrator during use – it

may be very hot.

Note…

• The product liability only applies if the instrument is

subject to a manufacturing defect. This liability

becomes void if the service personnel fails to follow the

maintenance instructions set out in this manual or uses

unauthorised spare parts.

• The instrument must not be exposed to draughts.

123200 03 26-03-2004 7

2.0 Maintenance

2.1 Adjusting and calibrating the instrument

You are advised to return the calibrator to Ametek Denmark A/S or an

accredited laboratory at least once a year for calibration and

adjustment.

Alternatively, you can calibrate/adjust the calibrator yourself.

You will need a calibrated, traceable sensor and thermometer with an

accuracy better than ±0.1°C / ±0.18°F (all MTC and CTC instruments

except CTC-1200 A), ±1.4°C / ±2.5°F (CTC-1200 A only) . Ensure

that the ambient temperature is 23°C±3°C / 73.4°F±5.4°F.

To calibrate/adjust the instrument five different temperatures are

needed. These are all preset in the various types of instruments.

The calibration temperatures are:

CTC-140 A / 1. -15°C / 5°F

MTC-140 A 2. 20°C / 68°F

3. 60°C / 140°F

4. 100°C / 212°F

5. 140°C / 284°F

CTC-320 A/B / 1. 50°C / 122°F

MTC-320 A 2. 120°C / 248°F

3. 180°C / 356°F

4. 250°C / 482°F

5. 320°C / 608°F

CTC-650 A/B / 1. 50°C / 122°F

MTC-650 A 2. 200°C / 392°F

3. 350°C / 662°F

4. 500°C / 932°F

5. 650°C / 1202°F

8 26-03-2004 123200 03

CTC-1200 A 1. 50°C / 122°F

2. 300°C / 572°F

3. 600°C / 1112°F

4. 900°C / 1652°F

5. 1200°C / 2192°F

Prepare to adjust/calibrate the instrument by doing the following (see

Fig. 1):

Caution…

• The well and the insertion tube must be clean before

use.

• The insertion tube must never be forced into the well.

The well could be damaged as a result, and the

insertion tube may get stuck.

• Do not touch the tip of the sensor when it is removed

from the insertion tube/well – it may be very hot.

Insulate the part of the sensor which is above the heating

well (use insulation tube part no. 65-F100 to 65-F107 and

insulation 30x30 mm part no. 105173).

Protect the sensor head from heat radiation from the well

by use of thermal protection shield (part no. 104216) or

similar.

123200 03 26-03-2004 9

Fig. 1

cTo enter service mode, switch on the instrument while

pressing the button.

dPress or until Calib. Proc. is reached:

Thermal protection shield

CALIBRA

ONI

NSTRUME

NTS

Insertion tube

Reference sensor

Reference thermometer

Jofra DTI-1000

Insulation 30x30 mm

Insulation tube

10 26-03-2004 123200 03

ePress to accept.

The instrument will now heat up/cool down to reach the first

of the 5 calibration temperatures:

°C

fOnce the calibrator is stable, press or to enter the

true temperature found using the reference thermometer

(the calibration temperature is suggested as a reference

point):

°C

gPress to accept the temperature.

Repeat this procedure for TEMP.2, TEMP.3, TEMP.4 and TEMP.5.

All five calibration temperatures and associated true temperatures

have now been entered.

The instrument will now check whether the true temperatures which

have been entered are within the permitted tolerances.

Permitted tolerances:

• CTC-140 A, CTC-320 A / B, MTC-140 A, MTC-320 A : ±0.15°C /

0.27°F

• CTC-650 A, MTC-650 A : ±0.25°C / 0.45°F

• CTC-650 B : ±0.35°C / 0.63°F

Ce manuel convient aux modèles suivants

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