Fluke 150X Series - Discharge Circuit Test; Insulation Function Testing

150X Series
Calibration Manual
14
Discharge Circuit Test
The subsequent Discharge Circuit Test is a safety related test that verifies input jack wiring to
the PCA, the RSOB contacts, RSOB PCA pads, and other active discharge components on the
PCA.
1. Place a shorting bar across the DUT
COM and INSULATION input terminals.
2. Set the DUT rotary switch to 1000 V, and press T.
3. Release T and remove the short from the DUT input terminals.
WCaution
To avoid damage to the DMM, DO NOT press the DUT T key when you do the
next steps.
4. Connect the test DMM to the DUT
INSULATION and COM terminals.
5. Set the test DMM to Ω function.
6. Make sure that the test DMM reads between 2000 Ω and 3000 Ω.
Test the Insulation Function
XWWarning
To prevent possible electrical shock or personal injury, avoid contact with the
DUT when you test the insulation function. When the Tester is in the Insulation
function, if you press the T key, it produces a potentially dangerous voltage
at the DUT insulation output terminals.
WCaution
To prevent damage to the calibrator, do not attempt to use the 5500A, 5520A, or
other standard calibrator for the insulation tests.
WCaution
To prevent damage to the Fluke 5320A, make sure to select the High Ohms
function before you push the T on the DUT.