Omega 24 Manuale Utente

24

NOTE: For calibrators with the older, single-jumper configura-
tion, refer to calibration procedure beginning on page 39.

1

4. Install calibration cover in place of bottom-cover.

1

5. Re-install battery.

1

6. Hook up test-equipment, calibration cables, and U.U.T. per Figure 10.

1

7. Turn on DMM and TC simulator for warmup. Allow at least 30 minutes.

1

8. Set the DMM to 200mV DC range.

1

9. Set the TC simulator to its COPPER output mode, with a reference tem-

perature 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 com-
pensation 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 sen-

sor 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.