Trek 156A - Rear Panel Features

Rear Panel Features
Figure 3-3: Rear Panel Features
1. OFFSET ADJUST: This adjustment minimizes plate voltage drift. The calibration is
2. CHARGER/SUPPLY Receptacle: This receptacle is for connection of the battery
3.
4. OUTPUT MONITOR Connector: This BNC provides a buffered, low-voltage replica
of the voltage on the ion collecting plate. The voltage at this output is 1/200th of the
voltage on the ion collecting plate.
Warning: Exercise extreme caution while connecting a BNC connector cable to the
OUTPUT MONITOR BNC receptacle. Do not confuse the OUTPUT MONITOR
BNC cable connector for the ION PLATE BNC cable connector. Inserting the
OUTPUT MONITOR connector into the ION PLATE connector could deliver a
voltage of 1100 volts to the BNC shell.
5. ION COLLECTING PLATE Receptacle: This BNC receptacle is for connection of
Warning: The Model 156A is battery operated and high-voltage may be present at
the ion collecting plate or ion plate connector whether or not the battery
charger/eliminator is connected to the rear panel when the POWER switch is ON.
III - 3
Operation
OFFSET
ADJUST
200 TO 1
PLATE
12VDC / 1A
GROUND
MONITOR
COLLECTING
CHARGER/SUPPLY
OUTPUT
ION
5
43
1
2
factory set and should not need adjustment.
eliminator/charger.
G
ROUND Jack: This banana jack is for connection to a ground reference point.
the ion collecting plate.