Omega Vehicle Security OMP-MODL manual 11-97

11... APPENDIX A: MASTER ICON REFERENCE

CJC - a Cold Junction Compensation sensor is mounted near the terminal strip header on the inside of the MLAD-1.. The temperature it measures at the terminal strip is used during thermocouple millivolt to temperature conversions (MLIM-1). This CJC Recalibration Period specifies how frequently the CJC temperature is checked and updated in the thermocouple calculation equation. Any temperature error in the measurement at the terminal strip will result in a nearly equal error in the thermocouple reading.

TIP: If a short duration test is being performed where maximum speed of thermocouple readings is required, sufficient accuracy may be achieved by setting the Recalibration Period fairly long. In this way, a CJC recalibration will be done before the first pass through the Program Net, then the high speed readings will be taken, then another CJC recalbration. During the test, the terminal strip thermal mass will keep the CJC temperature fairly constant.

Battery - the internal power supply voltage is checked periodically based on the User specified Recalibration Period. This Battery voltage is used by the Warning icon for detection of a Power Low condition and for update of the OMP-MODL front panel LCD System Supply Voltage display. For most applications of OMP-MODLs this period can be set fairly long (eg 3600 seconds) as battery voltage droops slowly. If additional loads are being powered such as modems, outputs, etc shorten this value accordingly.

If the Warning icon is not being used and battery voltage will not be checked via the LCD or through a serial communication Status Query, this Recalibration Period can be set very long.

Auto-answer after __ ring: If a OMP-MODL is equipped with a modem, the number of rings to wait before answering the call can be User defined. Enter the number in the provided text box.

USING THE OMP-MODL 11-97