Omega Vehicle Security 450 manual Calibration- Thermistor Type

Page 25

Calibration- Thermistor Type

Equipment List

∙4 ½ digit voltmeter

∙Precision decade box:

Resolution, 0.01 ohm ; accuracy ±0.02%

∙Ice Bath, 0.00 °C ± 0.05°C

∙Electro Scientific Industries DB-62 or equivalent

a.Turn the indicator ON by pressing the °C key.

b.Remove the bottom case of the indicator.

c.Connect a precision resistance box to the terminals on the phone input jack; set the resistance box to 7,280 ohms.

d.Connect the DVM LO lead to “GND”, on the indicator printed circuit board.

e.Using HI lead of DVM, measure voltage

22

Image 25

Contents Series Servicing North America Servicing Europe Operation DescriptionCalibration General Description Section DescriptionUnpacking Physical DescriptionCmrr Specifications±.45F±0.1% rdg Range Table Principles of Operation Section OperationReplacing the battery Recesses or each corner of the case bottom Page Page Operation Features Maintenance Calibration Section 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 Calibration is complete Zero CalibrationWARRANTY/DISCLAIMER Temperature Data Acquisition