Rear Panel Description - Teledyne 3350 Operating Instructions Manual

Alarm Oxygen Monitor
Data Entry Keys: Two pushbutton membrane switches are used to
manually change the span measurement parameters of the instrument as they are
displayed on the LED meter readout:
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Digital LED Readout: The digital display is a LED device that
produces large, bright, 7-segment numbers that are legible in any lighting
environment. It has three functions:
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1.4
The rear panel contains the electrical input and output connectors. Sepa-
rate rear panel illustrations are shown in figure 1-2 for the AC and DC battery
backup versions of the instrument. The connectors are described briefly here
and in detail in the Installation chapter of this manual.
Up Arrow Increment values of parameters upwards as they
are displayed on the LED readout.
Down Arrow Increment values of parameters downwards as
they are displayed on the LED readout.
Meter Readout: As the meter readout, it displays the oxygen
concentration currently being measured.
Measurement Parameters Readout: It displays the span
calibration point when it is being checked or changed.
Alarm Condition: It displays intermittently, "CAUt" and the gas
readings when a CAUTION Alarm has been initiated and "dAng"
for DANGER Alarm.

Rear Panel Description

Figure 1-2 Rear Panel, Control Unit - AC
(viewed from inside front door)
Teledyne Analytical Instruments
Introduction 1
1-3