Teledyne T360, Operation Manual, Page: 243 / 358

Teledyne API Model T360/T360M Operation Manual Troubleshooting and Service
241
8.3. CALIBRATION PROBLEMS
8.3.1. Miscalibrated
There are several symptoms that can be caused by the analyzer being miss-
calibrated. This condition is indicated by out of range Slopes and Offsets as
displayed through the test functions and is frequently caused by the following:

BAD SPAN GAS. This can cause a large error in the slope and a small error
in the offset. Delivered from the factory, the T360’s slope is within ±15% of
nominal. Bad span gas will cause the analyzer to be calibrated to the wrong
value. If in doubt have the span gas checked by and independent lab.

CONTAMINATED ZERO GAS. Excess H
2
O can cause a positive or
negative offset and will indirectly affect the slope.

Dilution calibrator not set up correctly or is malfunctioning. This will also
cause the slope, but not the zero, to be incorrect. Again the analyzer is
being calibrated to the wrong value.

Too many analyzers on the manifold. This can cause either a slope or offset
error because ambient gas with its pollutants will dilute the zero or span gas.
07272B DCN6552