Vanguard EZCT-S2A - Manual (Page 85)

REV 1 EZCT S2A USER’S MANUAL
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5.3 Verifying the EZCT S2A’s I
x
Sense Circuit Using an External Meter
You can verify the excitation current (I
x
) sensed by the EZCT S2A by using an external RMS
ampere meter. Follow the steps below to verify the EZCT S2A’s I
x
sense circuit:
a. Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure
16.
b. Select the EZCT S2A’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 S2A’s LCD screen against the value displayed
on the external RMS ampere meter.
e. Press the
[STOP]
key to end the test.
Figure 16. EZCT S2A I
x
Verification Test Connections