Wayne Kerr AP10030, User & Service Manual

Page: 39 / 70

Wayne Kerr AP 1kW Power Supplies • Issue 2 39
80A
±
0.08A at 13V
±
0.05V for AP30-80
Reduce mains to 198V a.c.
e) Adjust P1 (power limit) for unit to just go into the unregulated state as indicated by
‘UNREG’ in the status window.
8.2.5 Sense Balance
a) Connect as in 7.2.3.b). Disconnect link from T1 (11) and (10), and connect T1 (10)
to the junction of the load and ammeter.
b) Switch mains ‘ON’ and enable ‘OFF’. Adjust the voltage control to 20V and current
limit to:
31A for AP100-30
51A for AP60-50 and AP30-80
c) Switch enable ‘ON’ and adjust load to obtain:
30A
±
0.05A for AP100-30
50A
±
0.05A for AP60-50 and AP30-80
d) Adjust P4 (I sense balance) on control board until front panel meter reads:
30.0A
±
0.1A for AP100-30
50.0A
±
0.1A for AP60-50 and AP30-80
e) Switch unit ‘OFF’, and observing precautions as output capacitors may remain
charged for some minutes, disconnect T1 (10) from the junction of the load and
ammeter. Reconnect link between T1 (11) and (10).
f) Switch unit ‘ON’ and adjust the load, if necessary, to obtain:
30A
±
0.05A for AP100-30
50A
±
0.05A for AP60-50 and AP30-80
Check front panel meter reads
30.0A
±
0.5%
±
1 digit
50.0A
±
0.5%
±
1 digit
g) Repeat a) to f) if required.
8.2.6 Switch Unit Off
Observe precautions in case output capacitors have remained charged, disconnect load.