Teledyne 3020T Recognizing Difference Between LCD, Equipment Interface, Displays, Analog Outputs

Trace Oxygen Analyzer Introduction 1

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).

1.6Recognizing 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.

1.7Equipment 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.
Teledyne Analytical Instruments		1-5