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3) Adjustment procedures
- Connect an external resistor VR
2
between the "I ext. cont." R1
terminal and "I ext. cont." R2 terminal on the rear panel.
- Set the VR
2
to 10 kΩ.
- Press the OUTPUT key to turn on power.
- Rotate the I FS control on the front panel with the attached
adjustment screwdriver to adjust the output current to the rated
current.
NOTES:
- The potential at the terminals of the external resistor (VR
2
) should
be floated from the (+) and (-) output and GND potentials.
- As VR
2
, use a variable resistor which is free from aged deterioration
and noises and has a temperature coefficient of approximately
100 ppm/°C and capacity of 1/2 W or more.
- Connect VR
2
with a two-core shielded cable or stranded (+) and
(-) twist pair wires.
CAUTION
- If VR
2
is opened, over-current is output and the PA-B series may
be damaged.
- When changing the resistance using a switch or the like, it should
be a short circuit type switch that does not make the circuit open.
- Do not set the I ext. R switch to the ON position in the condition
where the output is on. Otherwise, current exceeding the
maximum rating is output, resulting in breakage of the load.
Front panel
I FS
