Martel Electronics IVC-222HPII - Manual (Page 8)

Figure 3
IVC-222HPII indicating current using an
external power supply
4. This instrument is equipped with an
automatic low battery indicator. When the
LCD “BAT” indicator appears, the battery
should be replaced immediately so that the
calibrator’s output accuracy is maintained.
4. Accuracy
The IVC-222HPII is checked against an NIST
traceable reference before shipment to verify
that each range falls within the .015%, ±2
counts of accuracy specification. Long term
accuracy, beyond one year, should remain
within .030%, ±2 counts of FSR. All of these
ratings are based on a 18°C to 28°C ambient
temperature.
From 18°C to 0°C and from 28°C to 50°C, there
is an accuracy change of .005% of full scale per
°C. Therefore, allowances must be made for
error caused by wide temperature variations.
6
+ − + −
mA Volts
Unit
Under
Test
Power
Supply
(+)
(+)
4 to 20mA
30 Volts
Max.