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4. Set calibrator 1 to 350 V and set calibrator 2 to -350 V.
5. Set both of the calibrators to OPER and verify that the DUT reads within the display
limits for 700 V.
6. During operation:
a. Use the rotary knob on calibrator 1 to gradually increase the voltage to 725 V.
b. Use the rotary knob on calibrator 2 to gradually decrease voltage to -725 V.
c. Verify that the DUT reads within the display limits for 1450 V.
d. Place both calibrators in STBY.
e. ONLY AFTER BOTH CALIBRATORS ARE IN STBY, disconnect all test leads
between the DUT and the calibrators.
For negative dc voltage measurements:
7. Set calibrator 1 to -350 V and set calibrator 2 to 350 V.
When you apply a negative DC Voltage, the Product beeps and the backlight
lights for 20 seconds. This is normal and you can continue with the measurement.
8. Set both of the calibrators to Operate and verify that the DUT reads within the display
limits for -700 V.
9. During operation:
a. Use the rotary knob on calibrator 1 to gradually decrease the voltage to -725 V.
b. Use the rotary knob on calibrator 2 to gradually increase voltage to 725 V.
c. Verify that the DUT reads within the display limits for -1450 V.
d. Place both calibrators in STBY.
e. ONLY AFTER BOTH CALIBRATORS ARE IN STBY, disconnect all test leads
between the DUT and the calibrators.
High Voltage DC Power Supply Method
To verify dc high voltage with a high voltage power supply:
1. Configure the high voltage dc power source to enable high voltage output:
a. Short circuit the pin 1 and pin 2 of the safety interlock on rear panel of DC power
source 2290-5.
b. Connect the red test lead of 2290-5-SHV cable to the V Ω input jack on the
bottom.
c. Connect the black test lead of 2290-5-SHV cable to the COM input jack on the
bottom.
d. Set DC power source to 700 V.
CAT III 1500V TRMS Clamp Meter
Note
Performance Tests
5
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