CHAPTER 5
Extension Configuration
Checking Ground Resistance at the Extension Shelf Power Input
FNC-7500-0061-200
Issue 1, May 2009
FLASHWAVE 7500 Release 6.1
Equipment Installation
5-46
Fujitsu and Fujitsu Customer Use Only
5.12 Checking Ground Resistance at the Extension
Shelf Power Input
Ideally, frame ground and battery return at the shelf power input connectors are common to
each other. Essentially a resistance of 0 ohms should be present between them and little or no
voltage potential across frame ground and battery return.
The test equipment required is a DMM or a voltmeter and ohmmeter that can accurately
detect low resistance levels. See Figure 5-21 [p. 5-46].
1 Use the DMM set to the voltmeter function or a voltmeter to measure the voltage between
frame ground and each of the battery return points. The reading should be very close to 0 V
DC.
2 Does the voltage exceed 1 V DC?
If YES:
Do not continue with Step 3 [p. 5-47] until the voltage source has been eliminated. For
technical assistance, call 1-800-USE-FTAC (800-873-3822).
If NO:
Continue with Step 3 [p. 5-47].
Figure 5-21: Ground Voltage Check Example
To Next Page
Loading...