Teledyne 3020M - Explosion proof paramagnetic oxygen analyzer - Manual (Page 11)

1-5
Percent Paramagnetic Oxygen Analyzer Introduction 1
Teledyne Analytical Instruments
With a Value Selected: Enters the value into the
analyzer as data. Advances VFD to next operation.
(See Chapter 4 for details.)
1.5.3 Displays
Digital Meter Display: The meter display is a LED device that
produces large, bright, 7-segment numbers that are legible in any lighting. It
produces a continuous readout from 0-100 %. It is accurate across all
analysis ranges without the discontinuity inherent in analog range switching.
Alphanumeric Interface Screen: The backlit VFD screen is an easy-
to-use interface from operator to analyzer. It displays values, options, and
messages that give the operator immediate feedback.
Flowmeter: Monitors the flow of gas past the sensor. Readout is 100 to
1000 standard cc per minute (cc/min x 100) valid for air or nitrogen.
1.6 Recognizing Difference Between LCD &
VFD
LCD has GREEN background with BLACK characters. VFD has
DARK background with GREEN characters. In the case of VFD - NO
CONTRAST ADJUSTMENT IS NEEDED.
1.7 Equipment Interface
1.7.1 Electrical Connector Panel
The electrical connector panel, shown in Figure 1-2, contains the
electrical connections for external inlets and outlets. The connectors are
described briefly here and in detail in the Installation chapter of this manual.
CAUTION: The power cable must be disconnected to fully
remove power from the instrument.
CAUTION: VOLTAGE MAY BE PRESENT ON ALARM CON-
TACTS WHEN LINE POWER IS DISCONNECTED.