Operating Procedure / Sample Calculation - Omega CALIBRE 1666 Technical Manual

OMEGA SA
Specifi c Information for calibre 1666
Operating procedure
1. Measure the rate with an integration time of
960 seconds (sixteen minutes).
The rate is measured with the stem pulled out to
position 2.
Test mode « magnetic » (rate measure of step motor).
2. Perform steps 1 to 5 of chapter 1.1 (operation to
enter into CS test mode).
3. Press the crown once, the LCD displays «TEST 1».
4. Release the crown, the LCD displays C and the
current correction value.
5. Perform corrections C+ or C- according to the
formula below (see the two examples).
6. Press P1, P2, P3 or P4 to adjust the new value.
7. The LCD displays the new correction value.
8. If the value displayed does not conform, perform
corrections on C+ or C- then press P1, P2, P3 or P4 to
adjust and display the new value.
9. Press the crown twelve times, the LCD displays «F».
10. Wait for four seconds; the watch returns to time mode.
Formula:
Measured error
Comment:
When there is a positive number of pulses use C+
When there is a negative number of pulses use C-
Sample calculation :
Current correction value
Measured rate error
Calculation to be
made
There must be 9 connections between C+ and the battery's +
pole
New correction value to be stored in the movement 089+9 = 098
Sample calculation :
Current correction value
Measured rate error
Calculation to be
made
There must be 18 connections between C- and the battery's +
pole
New correction value to be stored in the movement
175 -18 = 157
WORLD SERVICE ORGANIZATION
Number of pulses
089
+0.1s/day
0.1 x 1000
= 9
10.986
175
-0.2s/day
-0.2 x 1000
= 18
10.986
GT-19-C-069-E - A - 1666
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