Section 4
TM9211B-A-00
6 November 2013
4-7
(b)
Connect the Bridge Rx terminals to the UUT Common and Potential Terminals on the left side (4
to 2 wire connection).
(c)
Set the two range plugs to the 300 A terminals.
(d)
Output the first current (starting with lowest current first) for the 300 A and after proper bridge
measurement cycle (refer to user manuals for bridge), record the UUT value under MEASURED
VALUE on the worksheet.
(e)
Unit value should be between the minimum and maximum values. If not, unit will require repair.
(f)
Repeat for all currents listed for each 300 A test point. Always start with lowest current (minimum
heat dissapation) and work to highest current.
Note: Measurement Tips.
Consider the following when setting up the measurement
Verify that the max voltage or current applied in the measurement will not exceed the specs for the UUT or
the STD.
For the 100 A and 300A range, permit a stbilization time of 30 minutes for the lower currents and minimum
1h for test currents 100A and higher!
Verify the reversal rate is appropriated for the measurement and the uncertainty desired.
Ensure that you know whether the measurement you are reading on the bridge is either a ratio or actual
ohms value.
If using a PC, verify that the number of samples and logging delay are appropriate.
If using a PC set the environmental parameters in BridgeWorks .
Verify guard and ground connections (see 6622A Manual).
If using a scanner, ensure that the proper channels for Rx and Rs are selected.
Summary of Contents for 9211B Series
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