Vanguard EZCT-S2 - Manual (Page 56)

EZCT S2 USER’S MANUAL REV 3
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5.3 Verifying the EZCT S2’s I
x
Sense Circuit Using an External Meter
You can verify the excitation current (I
x
) sensed by the EZCT S2 by using an external RMS
ampere meter. Follow the steps below to verify the EZCT S2’s I
x
sense circuit:
a. Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure
14.
b. Select the EZCT S2’s Diagnostics mode (see section 5.1).
c. Press the [PAPER ∧ Contrast] key to raise the V
x
voltage.
d. Verify the I
x
voltage displayed on the EZCT S2’s LCD screen against the value displayed
on the external RMS ampere meter.
e. Press the
[STOP]
key to end the test.
Figure 14. EZCT S2 I
x
Verification Test Connections