Baker D30R, Руководство пользователя

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Troubleshooting
12/3/2009 | 71-022 V6
D30R 75
The instrument has an earth ground safety detect circuit. In certain situations, such as about
ship, the detector may think there is no safety ground present. The detector can be disabled
internally by removing the jumper wire present at J8-motherboard connector. To remove the
jumper, remove the I/O, A/D and Controller boards from the center front panel of the tester.
Look inside the card cage for the J8 jumper, clip it out with a small diagonal cuter, replace the
cards in the order taken out.
5)
How to test using the Baker Instrument with a generator to supply AC power at a
remote site.
The instrument will require a driven or earth ground to operate at a remote site, and will
need to have the safety ground detector disabled (#4 above).
6)
Test lead clips need replacement.
Slide the rubber test lead boots back, remove the old clip and replace the clips with the new
ones.
7)
How and why to test from the motor’s star point.
When testing very large, high capacity motors, it may be impossible to reach the desired test
voltage. Delta wound machines usually have an externally connected star point. It is often
possible to apply 25-50% more voltage to a single phase of a winding, if it is disconnected at
the star point, and tested end to end. The downside is the fact that the connection needs to
be broken, and re-taped after the test, which can take several hours. The upside is a smaller,
lighter, less expensive tester can be performed on a larger selection of equipment.
8)
Cleaning a dirty display.
Use a standard household cleaner such as Windex with a soft clean cloth, since the screen is
plastic. Steel wool or sandpaper will destroy the monitor screen.
9)
Doing high voltage testing with a printer attached to the printer port.
The surge pattern seen may show distortion from the interference. Additionally, it is possible
to damage the printer port. Quite high levels of RFI/EMI may be generated when the D40R is
doing a surge test. Print the results after testing is done, it will prolong the service life of the
Baker Instrument and any peripheral devices such as printers or laptop personal computers.
10)
Why the printer port is not specified for operation with cables longer than 10 meters.
The printer port on the D40R is a IEEE 1284 compliant parallel port. Electrical standards for
parallel ports do not specify correct operation with cable lengths over 10 meters. Data can
become scrambled and cause printer or computer problems. Baker Instrument Company, an
SKF Group Company suggests the use of a 2 meter cable.
11)
The screen shows a wavy appearance when the unit is at or near maximum output
surge test voltage.
The AC power source needs to supply at least 200 watts with minimal sag. If the AC supply
is extremely weak, the CRT may show some wavy appearing lines. Use a power supply rated
at least to 500 watts for reliable, trouble-free performance.