SENSTAR OmniTrax - Insulation Resistance Test

Cable tests
OmniTrax Product Guide Page 149
Insulation resistance test
The insulation resistance test ensures that the center conductor is isolated from the outer cable
conductor.
1. Select a sensor cable pair to test. Disconnect both connectors, allowing the connectors to
hang in mid-air during this test.
2. Set a digital multimeter to measure resistance, and attach it to the connector’s center
conductor and shell.
• For cable pairs with network decouplers the resistance should be > 20 M

• For cable pairs with standalone decouplers the resistance should be 130 k 5%
If the resistance is different, there could be a problem with the connector installation or the
decoupler.
3. Reverse the leads and repeat the measurement.
Figure 133: Insulation resistance test
PEAK
HOLD
ON OFF
DC
AC
TEMP C
2000 mA
200 mA
20 mA
2 mA
200 mV
200¦
2
20
200
1000 DC
750 AC
20M
2000k
200k
20k
2k
200 nS
mA
V
*C
S
¦
mA *C
V ¦
S
R
X
A
R
X
B
multimeter
measure connector shell
(shield) to center pin