Monroe Electronics Charge Plate - Analyzer - model 268A - Manual (Page 5)

Section 2
GENERAL INFORMATION
The Charged Plate Analyzer Model 268A separates into two components
connected by a ten-foot cable. The top part with the plate attached contains the
fieldmeter portion of the instrument and may be placed at the measurement site.
The bottom part with the controls and indicators may be placed in a convenient
operating location remote from the detector. To separate the two components,
release the two over-center latches near the rear of the unit and lift up at the rear
of the top section.
A ¼-20-threaded receptacle is provided inside of the top section for convenient
tripod mounting.
Two foldout legs are provided underneath the bottom of the control unit to
elevate the front of the cabinet to permit easy viewing of the meters.
Switches on the front panel are alternate action push-push type with the
exception of the three used for “plate control”. These are mechanically
interlocked so that only one function can be selected at a time.
Controls are grouped by function.
The three pushbutton switches directly beneath the “PLATE VOLTAGE” meter
relate to meter range and function.
The three switches at the lower center of the panel labeled “PLATE CONTROL”
affect the charge/discharge condition of the plate.
The “HV” control knobs, the “HV ON” indicator and the “POLARITY” pushbutton
switch relate to the polarity and magnitude of the initial charge voltage on the
plate.
The “TIMER LIMIT” switch sets the start/stop voltage limits for the timer.
The “OUTPUT” BNC connector (on the back panel) allows an oscilloscope or
recorder to be connected to the output of the fieldmeter. The signal here is
1/1000th of the actual voltage on the plate—regardless of the settings of the
meter range and function switches.
Two small holes are provided in the plate for the attachment of standard or
miniature banana plugs, useful for measuring induced charge or decay rate on
personnel.