14 Mm Probes - GE Bently Nevada 7200 Series Installation Manual

14 MM PROBES

The 7200 14 mm probe is available in many case styles, with or without armored probe cable,
and with or without a connector. The following specifications apply at 72° F (22° C) with AISI
E4140 steel target and when test equipment is used with accuracy as specified by BNC
Specification 150980.
A. Calibration Range
B. Interchangeability Error
1. Average Scale Factor Change (over
calibration range)
Typical (90%)
Maximum (99.7%)
2. Voltage Change at Same Physical
Gap (Maximum)
At midrange gap, 100 mils (2.54
mm)
Near beginning of range, 20 mils
(0.51 mm)
C. DC Resistance (Typical)
Probe Coil
Lead Center Conductor
Lead Shield
D. Insulation Resistance
160 mils (4.06 mm) beginning at
-2.0 Vdc -- approximately 20 to
180 mils (0.51 to 4.57 mm)
Less than 4 mV/mil (157 mV/mm)
Less than 8 mV/mil (315 mV/mm)
2.2 Vdc
1. 8 Vdc
3.5 ohms
0.354 ohms/ft (1.16 ohms/metre)
0.017 ohms/ft (0.06 ohms/metre)
Capable of withstanding a minimum of 500
Vac rms at 60 Hz between probe case and
electrical circuit with less than 1 mA current
flow.
APPENDIX B
25