Insulation Resistance (Hipot) Test (7751 And 7753 Only) - Keithley 2790 User Manual

Model 2790 SourceMeter

Insulation resistance (HIPOT) test (7751 and 7753 only)

WARNING
The leakage resistance (R
verified. As shown in
between the bridgewire and the housing. The resultant test circuit current is applied to an
I/V amplifier, where it is converted to a voltage. This voltage is then measured by the
DMM of the Model 2790.
NOTE
Figure 1-4
HIPOT testing (7751/7753)
Keithley 2790 SourceMeter Switch System
®
Switch System User's Manual
The Models 7751 and 7753 are provided with outputs that are poten-
tially hazardous if not connected properly. It is the responsibility of the
customer to operate instruments in a safe manner. Be sure to read and
follow all installation and operating instructions before attempting to
use the 7751/7753 HIPOT function.
HIPOT
Figure
If not using a 7751/7753 module in your test system, resistance up to 120MΩ
can be measured using the Ω2 function of the Model 2790.
Keithley 7751/7753 Module
R
HIPOT
+
V
SOURCE
(500V)
) between each of the initiators and the housing must be
1-4, this is performed by applying a voltage, typically 500V,
–
+
I/V Amplifier
(7751/7753)
V
SOUR
R = –
HIPOT
V
MEAS
500V
= –
V
MEAS
R
F
v
2790
DMM
R = 200kΩ (7751)
x R F
F
R = 20kΩ (7753)
F
x R
F
1-9