Rev. 1
Attach.
16
ATTACHMENT N -
CALIBRATION
Before servicing, switch off the equipment and unplug the power
supply cable from the mains socket
WARNING
This procedure must be performed by skilled technicians and using the ref
connector. Otherwise MOCOM Ltd won’t be responsible for the wrong
servicing.
Data memory locked
1. Remove the covers (see card Gr7-1 );
2. Unplug jumper X21 of the CPU board;
3. Maintaining pushed the three left-side keys, switch-on the unit;
4. LCD will clear any data; then switch-off the unit;
5. Remove the wirings of any PTn probe, and plug-in the ref connector provided
with the pin for checking the value 000,0;
6. Switch-on the unit, enter the SETUP mode, SERVICE menu, type the access
code “++--++--“, move to the option PT1 CORRECTION, and check that the
PT1 value matches 1500 Ω;
7. Exit SETUP mode, switch-off the unit, then switch-on again maintaining
pressed the Start key; LCD will show the message “SETUP” and then the
PT1 value;
8. Press the first left-side key; the value will decrease at 000,0;
9. Should the value to be different, use key + and – to change the value up to
000,0; wait a few seconds to check its stability;
10. Press the Start key and repeat the check for any PTn as above, adjusting the
value in case of mismatch from 000,0;
11. Press again the Start key to continue the PT calibration with the tests at
130.4; remove the ref connector, and plug-in it again in reverse direction;
12. Push the first left-side key; the value will increase to the new reference value;
13. Press again the first left-side key to approach the reading value; should the
value to be different, use key + and – to increase or decrease the value up to
the reference one; wait a few seconds to check its stability;
14. Press the key Start and repeat the check for any PTn as above, adjusting
the value in case of mismatch;
15. Continue with the MPx calibration at ambient pressure; use the left-side
key to approach the value to the reference one, and the key + to set the
value at 0,00; wait a few seconds to check its stability;
16. Press again the key Start for the MPx calibration at 2,10 bar; connect the
pressure transducer to an external air compressor, set the pressure at 2,10
bar; pushing the first left-side key the read value will approach to the
reference one; use key + and – to increase or decrease the value up to
match the reference one; wait a few seconds to check its stability;
17. Press again the key Start for the MPx calibration at -.90 bar; remove the air
compressor, and connect the pressure transducer to an external vacuum
pump; set the value at -.90 bar; pushing the first left-side key the read value
will approach to the reference one; use key + and – to increase or decrease
the value up to match the reference one; wait a few seconds to check its
stability;
18. Press again the key Start; the display will now show “SETUP COMPLETE”;
press the key Start to confirm, and wait the end of the self-test;
19. Switch-off the unit; remove the sample connector; restore the PTn wirings
and jumper X21;
20. Switch-on the unit, enter the SETUP mode, SERVICE menu, enter the code
“++--++--“, go to PT1 CORRECTION option;
21. Use key + and – to increase or decrease the value up to match the value
written on the label attached on the right rail;
22. Press the key Start to confirm the operation; exit the SETUP mode and
switch-off the unit;
23. Switch-on the unit and perform a sterilization cycle.
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