Megger MTO106, User Manual

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MTO106 ZP-BN01E BN034794AE
6 TROuBLESHOOTING AND cALIBRATION
6
T
roubleshooting and
Calibration
6.1 Troubleshooting
Resistance
value Voltage
value
Current value Probable cause Action
“----“ is
displayed
u < 0.06
mV
close to set value
1. Too low test current
2. Sense leads switched
3. Sense leads not connected
4. current leads shorted
1. Increase test
current
2. check sense leads
3. check sense leads
4. check current
leads
u < 0.06
mV
0.0 A
No current loop, current leads
not properly connected
check current leads
u > 20 V
Typical less than 50%
of set current value
Too high test current Lower test current
“< 0.010 mΩ”
is displayed Resistance below measurement
range
“< 0.10 mΩ”
“< 1.0 mΩ”
“< 0.010 Ω”
or
“< 0.10 Ω”
Too low test current Increase test current