Part I: 1-3
Percent Paramagnetic Oxygen Analyzer Part I: Control Unit
Teledyne Analytical Instruments
Data Entry Keys: Six touch-sensitive membrane switches are used to
input data to the instrument via the alphanumeric VFD display:
•Left & Right Arrows Select between functions currently
displayed on the VFD screen.
•Up & Down Arrows Increment or decrement values of
functions currently displayed.
•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. The –MB model produce continuous
readout 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.
I/OI/O
I/OI/O
I/O Power 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 must be disconnected 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 electronics and interface panel, 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.