Lucent Technologies 415B Battery Plant for 4ESS
7 - 68 Retrofit of 415A Battery Plant
Issue 6 September 1999
2. Verify that the polarity of the current reading on both the
sensor and the clamp-on probe are the same.
3. Adjust the multi-turn offset control on the EGCM so that
the display and the current probe read the same current.
The offset control potentiometer is located on the front of
the control unit.
4. If the offset cannot be adjusted properly, refer to the
calibration and/or repair procedure in the product manual
that is shipped with the EGCM.
Checking High
and Low Alarm
Set Points
Alarm set points can be checked by pressing the POSITIVE and
NEGATIVE alarm test buttons located on the display unit.
Holding the test button down will change the current reading at
a fast rate. Tapping the button will change the value slowly.
1. Hold the POSITIVE test button down until the current
increases.
2. Eventually the high alarm set point is exceeded.
3. Verify that when the set point is exceeded, the red alarm is
lit and an alarm is issued.
4. Verify the integrity of the alarm to the 4ESS
scan point.
5. Hold the NEGATIVE test button down until the reading is
below the low alarm set point.
6. Verify that when the set point is exceeded, the red alarm is
lit and an alarm is issued.
7. After the test button is released, the display current will
gradually return to the actual current reading.
Life Test
Note: This test will take at least 16 hours.
1. Be sure to follow the safety practices recommended in this
document.
2. Upon completion of all of the above tests, connect a test
load set to 0 amperes to the plant.
