Omega Vehicle Security 450 manual

Page 28

e.Move the DVM HI lead to the “3.7V” testpoint and record the voltage (disregard polrity).

f.The voltage measured at the “3.7V” test- point should be 3.007 times larger than the voltage measured at the “-1.23V” test- point. Adjust Rc (which varies the +3.7V line to attain the proper ratio.

g.Adjust Rb for an indicator display of 32.2°F.

h.Adjust Ra for an indicator display of +196.0°C.

i.Reassemble the indicator.

Perform the zero calibration

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Contents Series Servicing North America Servicing Europe Operation DescriptionCalibration Section Description General DescriptionPhysical Description UnpackingSpecifications Cmrr±.45F±0.1% rdg Range Table Section Operation Principles of OperationReplacing the battery Recesses or each corner of the case bottom Page Page Operation Features Maintenance Section Calibration CalibrationPage For T/C type Verify calibration once finished Ra Full Scale Adj Rb Zero Adj Rc +Full Scale Adj Calibration- Thermocouple Type K, J Page Page Calibration- Thermistor Type Page Calibration- Platinum RTD Page Zero Calibration Calibration is completeWARRANTY/DISCLAIMER Temperature Data Acquisition