SECTION 3
Page 67
Specifications
1. 955/955M Combination Fault Locator
A. Measurements
Function Range Resolution Accuracy
AC Voltage: 0 to 75 VAC 0.1V 0.7V
75 to 250 VAC 1.0V 3%
DC Voltage: 0 to 100 VDC 0.1V 0.5V
100 to 350 VDC 1.0V 3%
DC Current: 0 to 100 mA DC 0.1 mA 0.3 mA
(Zin = 430 ohms)
Resistance
1
: 0 to 100 Mohms 100 ohms 1%
@ 50 kohms @ 50 kohms
Opens
1
:(normal mode)
0 to 9.99 kft 10 ft @ 10 kft +
1%
10 k ft to 100 kft 100 ft +1/–10%
0 to 30000 m 3 m @ 500 m 1.5 m ±1%
@ 500 m
Tolerance to Leakage,
Normal Mode: >15 kohm to ground / 190 kohm to battery
Opens
1
:(special mode)
0 to 999 ft 1 ft +
1%
1 kft to 10 kft 100 ft @ 10 kft +1/–10%
0 to 30000 m 3 m @ 500 m 6m ±1%
@ 500 m
Tolerance to Leakage,
Special Mode: >1200 ohms to ground / 18 kohms to battery
Note:
1
Perform a self-calibration before taking the readings.
B. Resistance Fault Locate
Note: Accuracy is dependent on power influence noise; the resistance
fault specifications are for low noise situations.
Function Range ResolutionAccuracy
1,2
Fault Range: Up to 30 Mohms
Resistance to Fault:
2
0 to 9 ohms 0.01 Ohm +0.1% RTS
(@ 70° F no noise) +
0.01 Ohm
10 to 99 ohms 0.01 Ohm +
0.1% RTS
+
0.01 Ohm
100 to 999 ohms 0.1 Ohm +
0.2% RTS
1k to 7 kohms 1.0 Ohm +
1.0% RTS
Resistance to Distance Conversion
Resolution:
3
1 ft to 1,000 ft 0.1 ft
1k ft to 10k ft 1.0 ft
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