10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • [email protected]
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SERVICE INFORMATION
Preparation for Calibration:
1. Remove battery from unit under test (U.U.T.). Refer to Battery Installation/Replacement
section in the manual.
2. Remove bottom-cover from U.U.T. Refer to Disassembly Instructions.
3. Remove calibration-jumpers J1 and J2 from printed-circuit board.
NOTE: Removal of J1, J2 causes partial loss of previously stored
calibration data. Do not remove these jumpers unless recalibration
is intended.
4. Install calibration cover in place of bottom-cover.
5. Re-install battery.
6. Hook up test-equipment, calibration cables, and U.U.T. per Figure 11.
7. Turn on DMM and TC simulator for warmup. Allow at least 30 minutes.
8. Set the DMM to 200mV DC range.
9. Set the TC simulator to its COPPER output mode, with a reference temperature of 32.0°F.
10. Turn on U.U.T. and verify that "RTD" and "Ω," annunciators are flashing on the display. This
verifies removal of J1 and J2 respectively.
NOTE: Flashing "RTD" indicates that zero-offset corrections can be stored in
EEPROM. It also indicates that cold-junction compensation is disabled.
Flashing 'Ω’ indicates that error corrections for the cold-junction sensors
can be stored or recalled from EEPROM.
11. Clear the EEPROM locations used to store E1 (meter cold-junction sensor error) and E2
(calibrator cold-junction sensor error) as follows:
a. Set U.U.T to CALIB, OPR, K, °F mode.
b. Key in: CHANGE/0.0/ENTER/STO/1/OPR (E1 is set to 0.0°F)
c. Key in: CHANGE/0.0/ENTER/STO/2/OPR (E2 is set to 0.0°F)
NOTE: Both 1 & 2 memory annunciators should be turned on, but the "RTD"
annunciator will have turned off.
d. Perform RECALL 1 and RECALL 2 to verify storage of 0.0°F in both locations.
NOTE: At the completion of calibration, E1 and E2 will be saved in EEPROM.
Memory locations 1 and 2 will be free for normal use.
e. Set U.U.T. to METER, OPR, K, °F.
f. Turn U.U.T. OFF, then ON to re-enable 'RTD' and 'Ω,' annunciators.