Teledyne 2010A - Split architecture thermal conductivity analyzer - Manual (Page 39)

Thermal Conductivity Analyzer Part I: Control Unit
Part I 4-5 Teledyne Analytical Instruments
4.3.1 Setting the Display
Contrast Function is DISABLED
If you cannot read anything on the VFD after first powering up:
1. Observe LED readout.
a. If LED meter reads 8.8.8.8.8., go to step 3.
b. If LED meter displays anything else, go to step 2.
2. Press I/O button twice to turn Analyzer OFF and ON again. LED
meter should now read 8.8.8.8.8.. Go to step 3.
4.3.2 Setting up an AUTO-CAL
When proper automatic valving is connected (see chapter 3, installation),
the Analyzer can cycle itself through a sequence of steps that automatically zero
and span the instrument.
Note: Before setting up an AUTO-CAL, be sure you understand the
Zero and Span functions as described in section 4.4, and
follow the precautions given there.
Note: If you require highly accurate AUTO-CAL timing, use external
AUTO-CAL control where possible. The internal clock in the
Model 2010A is accurate to 2-3 %. Accordingly, internally
scheduled calibrations can vary 2-3 % per day.
Note: If all your ranges are for the same gas application, then AUTO-
CAL will calibrate whichever range you are in at the scheduled
time for automatic calibration.
Note: If your ranges are configured for different applications, then
AUTO-CAL will calibrate all of the ranges simultaneously (by
calibrating the Cal Range).
To setup an Auto–Cal cycle:
Choose System from the Function buttons. TheVFD will display five
subfunctions.
CONTRAST AUTO—CAL
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Contrast Function is DISABLED
(Refer to Section 1.6)
(Refer to Section 1.6)