Teledyne 3020T - Manual (Page 11)

1-5
Trace Oxygen Analyzer Introduction 1
Teledyne Analytical Instruments
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 0-10,000 ppm and then switches to a
continuous percent readout from 1-25%. It is accurate across all analysis
ranges without the discontinuity inherent in analog range switching.
Alphanumeric Interface Screen: The 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 0.2 to
2.4 standard liters per minute (SLPM).
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.
Access: To access the electrical connector panel, or the sensor block,
the control panel doubles as a door that can be unbolted and swung open.
Electrical Connections: The electrical connections on the electrical
connector panel are described briefly here, and in more detail in chapter 3
Installation.
• Power Connection 115 or 230 V dc, 50 or 60 Hz.
• Analog Outputs 0-1 V dc concentration plus 0-1 V dc
range ID, and isolated 4-20 mA dc plus
4-20 mA dc range ID.