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Connect:
DVM to current shunt (if used).
Adjust:
VR15 for 40.00 Amps actual current.
Note that this method requires that the terminal voltage be exactly correct. Otherwise,
measure the actual terminal voltage, compute the required current (at 20A/V) and set
for that figure.
8 V mode setting calibration
Select:
Enable = out, Slow Start = out, Slew Range = mid.
Mode = 8 Volts, Level Control = Level B.
Set:
Power supply Current Limit = 6.5 Amps
Connect:
DVM to front panel input terminals.
Select:
Meters = Volts & Amps, Enable = in.
Check:
Current is zero.
Set:
Increase power supply output voltage setting until it enters current limit (at about 8
volts), then a little more (to avoid operating near the cross-over).
Check:
On scope (at Current Monitor output) that the system is stable. If not, try using a
different source.
Adjust:
VR32 for 8.000 V on DVM
High Voltage Modes
Set:
Enable = out.
Connect:
Connect high voltage supply, if necessary, to rear panel load input terminals.
DVM to front panel Load Input terminals.
400 Ohm mode setting calibration
Set:
Supply voltage to 80 Volts.
Enable = out, Mode = 400 Ω, Control = Level A.
Select:
Meters = Level A & Level B, set Level A to 200.0 Ω.
Enable = in. Meters = Watts & Ohms.
Check:
Current is about 400 mA.
Check on scope that the system is stable.
Adjust:
VR17 for Ohms (RH) meter to read 200.0 (this reading may jitter by ± 2 Ohm).
80 Volts mode setting calibration
Set:
Set supply to 70 Volts output and set its current limit to 830 mA.
Select:
Mode = 80 V, Control = Level B, Slew Range = Mid.
Meters = Level A & Level B, set Level B above 72.0.
Enable = in.
Switch on supply output.
Check:
Current is zero.
Select:
Meters = Level A & Level B.
Check:
Supply is in current limit at 830 mA
Slowly reduce Level B setting until RH display reads 60.00
Check on scope that the combination of load and supply is stable. If not, try using
supply (with current limit set higher) in series with 10Ω 10 Watt non-inductive resistor.
Adjust:
VR36 for DVM to read 60.00 Volts
30
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