Vanguard EZCT-2000B - Manual (Page 104)

EZCT-2000B USER’S MANUAL REV 1
100
5.3 Verifying the EZCT-2000B’s I
x
Sense Circuit Using an External Meter
You can verify the excitation current (I
x
) sensed by the EZCT-2000B by using an external RMS
ampere meter. Follow the steps below to verify the EZCT-2000B’s I
x
sense circuit:
a. Connect the X cables to a power resistor and an RMS ampere meter as shown in Figure
22.
b. Select the EZCT-2000B’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-2000B’s LCD screen against the value
displayed on the external RMS ampere meter.
e. Press the
[STOP]
key to end the test.
Figure 22. EZCT-2000B I
x
Verification Test Connections