Teledyne 9700 - Flue gas analysis system - Manual (Page 29)

4-1
Flue Gas Analysis System Operation 4
TELEDYNE BROWN ENGINEERING
Analytical Instruments
Operation
4.1 Startup of Oxygen Analyzer
4.1.1 Preliminary
Before applying power to the instrument, TBE/AI suggests that the
electrical wiring installation be checked against the interconnection dia-
gram (see Figure 6), especially if the installation has been made by person-
nel other than those responsible for startup and operation. In many in-
stances, proper attention to this preliminary check will prevent severe
damage due to accidental wiring transpositions.
4.1.2 Meter Zeroing
Before turning power to the analyzer on, (RANGE switch in any
position but OFF), the mechanical zero of the meter should be checked and
adjusted, if necessary. The meter indicating pointer should be in precise
coincidence with the scale zero mark. Use the mirror to eliminate parallax;
adjust the screw on the face of the meter to zero the pointer. Zeroing of the
meter is important to achieve maximum accuracy of the meter, and even
more important if remote indicating and/or recording equipment are in-
volved in the system. An offset zero on the meter will result in a tracking
error between the two devices which would be significant if the meter is
used to calibrate the analyzer (normal procedure).
CAUTION: Never attempt to make this adjustment with the power on.