2548H INSTRUCTION MANUAL
56-101-00420 Rev. C
Ch. 2
Nov
/
07
/
14
Page 9 of 33
CHAPTER 2: CAPABILITIES AND SPECIFICATIONS
1. CAPABILITIES
When the 2548H Fuel Quantity T/S is connected through the appropriate adapter cables,
the following functions may be performed:
Measure capacitance of individual or interconnected tank sensor probes or probe
simulators
Measure the insulation resistance of system wiring, probes, or other discrete test points.
Test the performance of indicators and signal conditioners or bridge amplifiers.
Simulate capacitances representative of empty or full probes or systems, or the added
capacitance effect of the fuel between empty and full.
Substitute the test set meter for DC meter-movement type gauges, and provides
adjustable metered current to test these gauges.
2. SPECIFICATIONS
INSULATION
Range:
0 to Infinity (
∞
) in two scales:
5 to 5000 M
Ω
50
k
Ω
to 50 M
Ω
Accuracy:
±5% of reading nominal, but not in excess of ±2% of scale length all
through range
Applied Voltage:
10 VDC nominal
Current
50 nA maximum
INDICATOR
Range:
0-1100 µA in 10 µA increments
Accuracy:
±1% of full scale
CAPACITANCE BRIDGE
Range:
0 to 999.9 pF in 0.1 pF increments
Accuracy:
± (0.1% of r 0.1 pF)
Signal:
400 Hz at 5.7 V RMS nominal
