Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 41)

NDIR Gas Analyzer Operation
Teledyne Analytical Instruments 25
Operation
4.1 Preparation for operation
Tube and wiring check
• Double-check if tubes of the gas sampling and exhaust ports are
correctly connected.
• Double-check for proper wiring.
4.2 Warm-up Operation and Normal Operation
(1) Operation Procedure
1. Turn ON the power switch on the left side when facing the front
panel of the analyzer unit. The measurement screen will appear
on the front display panel in a few seconds.
2. The instrument warm-up time is about 4 hours after which the
instrument will produce an accurate measurement.
Note: During the warm-up stage, the concentration reading may
be above the upper range limit. When this occurs, the
indication will display as a series of four dashes. However,
this is not an error.
3. During the warm up period, you can set the various instrument
parameters as described in Section 6: Setting and Calibration.
4. After the warm-up period, perform the zero/span calibration as
described in Section 6.8 Calibration.
5. After calibrating the analyzer, introduce sample gas into the
analyzer and allow the lines to purge before accepting the
measurement value.