Recognizing Difference Between Lcd & Vfd; Rear Panel (Equipment Interface) - Teledyne 2000A-EU Operating Instructions Manual

Thermal Conductivity Analyzer
•
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 trace readout from 0-9999 ppm or a continuous
percent readout from 1-100 %. It is accurate across all analysis ranges.
Alphanumeric Interface Screen: The VFD screen is an easy-to-use
interface between operator and analyzer. It displays values, options, and
messages that give the operator immediate feedback.
Standby Button: The
but circuitry is still operating.
CAUTION: The power cable must be unplugged to fully
Access Door: For access to the thermal conductivity sensor or the
front panel electronics, the front panel swings open when the latch in the
upper right corner of the panel is pressed all the way in with a narrow
gauge tool. Accessing the main electronics circuit board requires unfasten-
ing rear panel screws and sliding the electronics drawer out of the case.
(See chapter 5.)
CAUTION: The Access door must be closed and latched for
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
All electrical inputs and outputs to the 2000A are made through rear-
panel connectors. The connectors are described briefly here and in detail in
chapter 3, Installation.
Escape Moves VFD back to the previous screen in a series. If
none remains, returns to the Analyze screen.
disconnect power from the instrument. When
chassis is exposed or when access door is open
and power cable is connected, use extra care to
avoid contact with live electrical circuits.
CE mark compliance to be in effect.

Rear Panel (Equipment Interface)

Teledyne Analytical Instruments
Introduction 1
turns off the display and outputs,
1-5