Manual

Part I: 1-3
Oxygen Analyzer Part I: Control Unit
Teledyne Analytical Instruments
• Enter Moves VFD display on to the next screen in a series.
If none remains, returns to the Analyze screen.
• Escape Moves VFD display back to the previous screen in a
series. If none remains, returns to the Analyze screen.
Digital Meter Display: The meter display is a LED device that
produces large, bright, 7-segment numbers that are legible in any lighting.
It is accurate across all analysis ranges from 0-1 % through 0-100 %
Alphanumeric Interface Screen: The backlit 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 red I/O button switches the instrument
power between I (ON) and O (a Keep-Alive state). In the O state, the
instrument’s circuitry is operating, but there are no displays or outputs.
CAUTION: The power cable must be unplugged to fully
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 .
Access Door: For access to 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 circuit board
and other electronics requires unfastening the rear panel screws and sliding
the unit out of the case.
1.3 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.
1.4 Control Unit Rear Panel
The Control Unit rear panel, shown in Figure 1-2, contains the
electrical connectors for external inputs and outputs. The input/output
functions are described briefly here and in detail in the Installation chapter
of this manual.