Omega Vehicle Security 450 - Manual (Page 27)

24
Calibration- Platinum RTD
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 RTD input jack and set the
resistance box to 100.04 ohms.
d. Using HI lead of DVM, measure voltage
at the “-1.23V” testpoint: disregarding
polarity indication, record the voltage.