Wayne Kerr AP10030, Руководство пользователя и обслуживания

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38 Wayne Kerr AP 1kW Power Supplies • Issue 2
d) Disconnect DVM leads and adjust resistance box to 4k7
Ω ±
0.02%. Adjust the load
to maximum resistance and set the front panel voltage control to obtain 10V output.
Switch the unit on and using the DVM to measure the current through the load,
adjust the load and P3 (I sense gain) to obtain 30A
±
0.1A for model AP100-30, 50A
±
0.1A for model AP60-50 and 80A
±
0.1A for model AP30-80 through the load
whilst in current limit.
e) Check the front panel ammeter reads 30A
±
0.1A for model AP100-30, 50A
±
0.1A
for model AP60-50 and 80A
±
0.2A for model AP30-80.
f) Reduce the resistance box to 470
Ω
to obtain 0.500V
±
0.003V between T1 (3) and
(9) and adjust P7 to obtain 3A
±
20mA for model AP100-30, 5A
±
20mA for model
AP60-50 and 8A
±
20mA for model AP30-80.
g) Check the front panel ammeter reads 3A for model AP100-30, 5A for model AP60-
50 and 8A for model AP30-80.
h) Repeat d) to f) until adjustments are not required.
i) With output enable off, adjust the front panel voltage control to obtain 97.5V for
AP100-30, 58.5V for AP60-50 and 29.25 for AP30-80 on the front panel meter.
Adjust P5 on the front panel board until the last segment of the voltage bargraph just
lights.
Absolute Current Limit
j) With conditions as d) and output enable ‘ON’, adjust resistance box to 5.85k
Ω
and
adjust the load to obtain:
32
±
0.1A for AP100-30
54
±
0.1A for AP60-50
82
±
0.1A for AP30-80
k) Adjust P2 (absolute current limit) until unit just goes into current limit (shown by he
UNREG indicator).
l) Disconnect resistance box and replace links T1 (3), (4) and (5).
8.2.4 Power Limit
a) Connect unit to an adjustable supply capable of delivering at least 2kVA.
b) Connect a resistive load in series with a reference ammeter across the output
terminals. Connect a DVM (4 digits) to output terminals.
c) Switch mains ‘ON’ and enable ‘OFF’. Adjust the front panel controls to the
following settings:
35V 31A for AP100-30
21V 51A for AP60-50
13V 81A for AP30-80
d) Switch enable ‘ON’ and adjust the load to obtain in constant voltage mode:
30A
±
0.05A at 35V
±
0.05V for AP100-30
50A
±
0.05A at 21V
±
0.05V for AP60-50