Varian ProStar 340, Operation Manual

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Setting Voltage
Make sure the power cord is disconnected from the rear panel of the detector.
Refer to the figure above. Check the voltage selector block
located next to the power cord connector on the rear panel. The
plastic tab indicates the voltage for which instrument has been
set (100, 120, 220, or 240V; 50/60Hz). If the voltage is set
incorrectly, reset it to the proper value before proceeding further.
Insert the blade of a small screwdriver into the slot next to the
connector and pry open the fuse block. Pull the fuse block
straight out. Using a pair of longnose pliers, pull the voltage
selector card straight out. Orient the plastic indicator for your
voltage) then press the selector card back into place. Ensure
that the fuse block is properly oriented for the selected voltage
by rotating the block along its longitudinal axis until:
•
The long single fuse faces outward for 100 and 120V (1 Amp
slow-blow).
•
The two short fuses face outwards for 200 and 220V (0.5
Amp slow-blow).
Snap the fuse block cover back into place.
Setting Recorder Full-scale Voltage
The detector provides a single strip chart recorder channel. The
full scale voltage for this channel may be set at 10 mV, 100 mV,
or 1.0V using a bank of switches located on the Rear Panel (see
Figure 7). The instrument is factory configured to 10mV full
scale. To change the full scale voltage:
1. Press the bottom half of switch #3 so that it rocks downward
to OFF.
2. For 100 mV full scale, press the top part of switch #2 so that
it rocks to ON.
3. For 1.0V full scale, press the top half of switch #1 so that it
rocks to ON.
WARNING:
SHOCK HAZARD