HP 5065A Operating And Service Manual page 19

Model 5065A
Circuit Diagrams, Theory, and Maintenance
Figure 3-2. Turn-On Procedure
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1. Set rear 115/230 Vac switch to correspond with
line voltage used.
2. Check that function switch is set at OPER and
OSC FREQ FINE is set at 250. It should remain
in this position during normal operation.
3. Connect ac power cord (supplied) between rear
ac jack and ac line power.
4. On units equipped with Option 002, Standby
Power Supply, press BATTERY switch to RESET;
then switch to FAST CHARGE. Note that
BATTERY lamp comes on. If ac line power fails,
the BATTERY lamp will pulse.
5. Allow 1-hour warmup and then press START/
AUTO to START momentarily. In units equipped
with Option 001, a mechanical lock prevents
placing this switch at AUTO START.
6. Press LOGIC RESET. CONTINUOUS OPER­
ATION lamp should come on to indicate that
frequency-stabilizing feedback loop is locked.
If not, refer to Section V. Use 50 il load on
outputs.
7. Rotate CIRCUIT CHECK (all positions) and
check for meter readings (Table 3-1). If readings
do not check out, refer to troubleshooting infor­
mation in Section V. Note: After a 1-hour
warmup, the 5065A is within approximately 1
part in 10'° of the UTC Time Scale and within
approximately 5 parts in 10" after 4 hours.
NOTE
If CONTINUOUS OPERATION lamp goes off
after instrument has warmed up, the CIRCUIT
CHECK meter switch should be set to the LAMP
OVEN and CELL OVEN positions. If either
meter indication is full scale, the instrument
should be turned off immediately. If not the
RVFR assembly could be damaged.
8. Let the 5065A battery continue to fast charge for
a total of 16 hours. At the end of this time, set
BATTERY switch to FLOAT for a continuous
trickle charge.
9. After 24 hours running time, thermal equi­
librium is established and meter readings are
stabilized. Rotate CIRCUIT CHECK switch
through all positions and record readings on the
door chart.
10. See Paragraph 5-7 for periodic adjustments.
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