Ametek JOFRA ATC-125 User manual

Service Manual
Temperature Calibrator
JOFRA ATC-125/140/155/156/157/250/320/650 A/B
Copyright 2007 AMETEK Denmark A/S

2 18-09-2007 122770 06

122770 06 18-09-2007 3
List of contents
1.0 General ..................................................................................... 5
1.1 Introduction ................................................................................... 5
1.2 Safety Instructions ........................................................................ 7
1.3 Adjusting and Calibrating the Instrument...................................... 8
2.0 Repairs ..................................................................................... 9
2.1 Service Menu ................................................................................ 9
2.1.1 Service Main Menu........................................................... 10
2.1.1.1 Service Power Menu............................................ 11
2.1.1.2 Service Input Menu.............................................. 12
2.1.1.3 Service Output Menu ........................................... 15
2.1.1.4 Service Keyboard Menu ...................................... 16
2.1.1.5 Service Display Menu .......................................... 16
2.2 Trouble Shooting......................................................................... 17
2.2.1 Supplies ............................................................................ 35
2.2.2. Oil Problems ..................................................................... 35
2.3 Replacement of Spare Parts....................................................... 37
2.3.1 DIP-Switch Settings.......................................................... 59
2.3.2 Configuring the Power PCB for ATC-320 A/B (version 1) 60
2.3.3 Configuring the Power PCB for ATC-320 A/B (version 2) 61
2.3.4 Configuring the Power PCB for ATC-650 A/B (version 1) 61
2.4 Adjusting and Testing PCB’s ...................................................... 61
2.4.1 Current limiter for ATC-140/155/156/157 A/B .................. 61
2.4.2 MVI Circuit for ATC-250/320/650 A/B .............................. 62
3.0 Spare Parts and Drawings.................................................... 64
3.1 Spare Parts ................................................................................. 64
3.2 Exploded View – ATC-125 A/B................................................... 73
3.3 Exploded View – ATC-140 A/B................................................... 74
3.4 Exploded View – ATC-155 A/B................................................... 75
3.5 Exploded View – ATC-156 A/B................................................... 76
3.6 Exploded View – ATC-157 A/B................................................... 77
3.7 Exploded View – ATC-250 A/B................................................... 78
3.8 Exploded View – ATC-320/650 A/B............................................ 79
3.9 Wiring Diagram – ATC-125 A ..................................................... 80

4 18-09-2007 122770 06
3.10 Wiring Diagram – ATC-125 B ..................................................... 81
3.11 Wiring Diagram – ATC-155 A ..................................................... 82
3.12 Wiring Diagram – ATC-155 B ..................................................... 83
3.13 Wiring Diagram – ATC-140/156 A .............................................. 84
3.14 Wiring Diagram – ATC-140/156 B .............................................. 85
3.15 Wiring Diagram – ATC-157 A ..................................................... 86
3.16 Wiring Diagram – ATC-157 B ..................................................... 87
3.17 Wiring Diagram – ATC-250/320/650 A ....................................... 88
3.18 Wiring Diagram – ATC-250/320/650 B ....................................... 89

122770 06 18-09-2007 5
1.0 General
1.1 Introduction
This service manual applies to the following instruments:
• JOFRA ATC-125 A/B
• JOFRA ATC-140 A/B
• JOFRA ATC-155 A/B
• JOFRA ATC-156 A/B
• JOFRA ATC-157 A/B
• JOFRA ATC-250 A/B
• JOFRA ATC-320 A/B
• JOFRA ATC-650 A/B
All calibrators are produced from quality components by skilled staff.
Each calibrator passes several tests during assembly. It undergoes a
final inspection and test, followed by 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
reference manual order no. 105446. Please note that this is only
available in English.

6 18-09-2007 122770 06
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, 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
3450 Allerød
Denmark
Phone: [phone]
Fax: [phone]

122770 06 18-09-2007 7
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.
For a more detailed description of the safety instructions
we refer to the reference manual 105446 or the user
manual 105447.
Safety Symbols
This manual contains a number of safety symbols designed to draw
your attention to instructions that must be followed when using the
instrument, as well as any risks involved.
Warning
Events that may compromise the safe use of the instrument
and result in considerable personal or material damage.
Caution…
Events that may compromise the safe use of the instrument
and result in slight personal or material damage.
Note…
Special situations which demand the user’s attention.

8 18-09-2007 122770 06
1.3 Adjusting and Calibrating the Instrument
For adjusting and calibrating the instrument we refer to the reference
manual 105446, section 7.2.
Please follow the guidelines in chapter 5.0 “Storing and transporting
the calibrator” in the reference manual in order to care properly for the
instrument after use.

122770 06 18-09-2007 9
2.0 Repairs
Warning
The calibrator must be switched off before any attempt is
made to service the instrument.
Note…
If the software detects an error during operation, the error
will be shown in the display.
Make a note of the error message and contact your
distributor or AMETEK Denmark’s Service Department.
AMETEK Denmark’s liability ceases if:
• parts are replaced/repaired using spare parts, which are
not identical to those recommended by the manufacturer.
• non-original parts are used in any way when repairing
the instrument.
AMETEK Denmark’s liability is restricted to errors that
originated from the factory.
2.1 Service Menu
In the Service Menu it is possible to check a number of conditions in
the equipment. To reach the Service Menu, follow the procedure
described on the following pages:

10 18-09-2007 122770 06
)
T
urn the equipment on while pressing the and button.
T
he start sequence stops and the following menu appears:
The instrument can now be monitored while still functioning normally,
however, there is no access to the functions Switch Test and Auto
Step. Likewise, Work Orders cannot be executed.
2.1.1 Service Main Menu
)Press and the Service Menu will appear
Following information can be seen
• Mains freq shows mains frequency, which is measured by the
ATC itself. This has to comply with the actual mains frequency
(50Hz or 60 Hz)
• Tick is a counter with 1ms increment that starts when the
instrument is turned on.