User Manual

Initial Power Up – continued
SC4812ET BTS Optimization/ATP — CDMA LMF
Jan 2002
2-6
Figure 2-3: Meter Alarm Panel
OFF
VOLT
VOLT
–
+
TEST POINTS
AMPS
–
+
TEST POINTS
AMP
PWR
ON
FRONT VIEW
FW00245
Figure 2-4: Temperature Compensation Panel
OFF
V ADJ
SENSOR
25 c
SENSE
–
+
COM
ON
ON
FRONT VIEW
1/2 A 250V
12
TEMPERATURE COMPENSATION PANEL
FW00246
Power Cabinet Power Up
Tests
Table 2-5 lists the step–by–step instructions for Power Up Tests.
Table 2-5: Power Cabinet Power Up Tests
Step Action
1 Probe the output voltage test point on the Meter Alarm Panel while pressing the 25° C set button on
the TCP (see Figure 2-4). The voltage should read 27.4 +
0.2 Vdc. Adjust Master Voltage on Meter
Alarm Panel if necessary. Release the TCP 25° C set button.
2 Depending on the ambient temperature, the voltage reading may now change by up to + 1.5 V
compared to the reading just measured. If it is cooler than 25C, the voltage will be higher, and if it is
warmer than 25C, the voltage will be lower.
3 Ensure the RF cabinet 400A main DC breaker is OFF.
4 Close the three (3) Main DC breakers on the Power Cabinet ONLY. Close by holding in the reset
button on the front of the PDA, and engaging one breaker at a time.
5 Measure the voltage between the + and – terminals at the rear of the Power Cabinet and the RF
Cabinet, observing that the polarity is correct. The voltage should be the same as the measurement in
step 2.
6 Place the probes across the black and red battery buss bars in each battery compartment. Place the
probe at the bottom of the buss bars where the cables are connected. The DC voltage should measure
the same as the previous step.
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