Manual Zero/Span Check Or Calibration Through The Sample Port; Table 7-2: Manual Zero - Teledyne 6400A Instruction Manual

TAI Model 6400A SO
7.1 Manual Zero/Span Check or Calibration through the
Sample Port
The zero and span calibration of the instrument can be checked or adjusted using gases supplied
through the normal sample port. This method is often used when the calibration gas is supplied
from an external calibrator system.
This mode provides a calibration mechanism if the instrument is purchased without IZS or
Zero/Span Valve options.
Since the zero gas concentration is defined as 0 ppb, it is not necessary to enter the expected zero
value. Table 7-2 details the zero calibrate procedure with zero gas coming in through the sample
port.
Table 7-2: Manual Zero Calibration Procedure - Zero Gas Through Sample Port
Step Number
1.
2.
3.
4.
5.
Analyzer Operator Manual, 02164, Rev. G
2
Action Comment
Press CAL The 6400A enters the calibrate mode from sample mode. The
zero gas must come in through the sample port.
Wait 10 min Wait for reading to stabilize at zero value
Press ZERO If you change your mind after pressing ZERO, you can still
press EXIT here without zeroing the instrument.
Press ENTR Pressing ENTR actually changes the calculation equations.
Press EXIT The 6400A returns to sampling. Immediately after calibration,
data is not added to the DAS averages.
7-4