14 Mm Extension Cables - GE Bently Nevada 7200 Series Installation Manual

14 MM EXTENSION CABLES

A. Electrical Characteristics
The following specifications apply at 72° F (22° C) with AISI E4140 steel target and when test
equipment with accuracy as specified by Bently Nevada Corporation specification 150980 is
used. Typical is defined as 90% (2 sigma) of extension cables built, and worst case is defined
as 99.7% (3 sigma) of extension cables built.
1. Calibration Range
2. Interchangeability Error with 14 mm System
a. Average Scale Factor Change
i Typical
ii Worst case
b. Voltage Change at Same Gap (Max)
i At midrange 120 mils 3.0
mm)
ii Near beginning of range, 20
mils (0.51 mm)
3. DC Resistance, Nominal
a. Center conductor
b. Shield
4. Capacitance
5. Characteristic impedance
160 mils (4.06 mm) beginning at -2.0 Vdc,
approximately 20 to 180 mils
(0.51 mm to 4.57 mm)
Less than 1.3 mV/mil (51 mV/mm)
Less than 2.4 mV/mil (94 mV/mm)
0.7 Vdc
0.4 Vdc
0.354 ohms/ft (1.16 ohms/metre)
0.017 ohms/ft (0.06 ohms/metre)
15.4 pF/ft (50.5 pF/metre)
95 ohms
APPENDIX B
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