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Calibration Procedures Teledyne API - Model 200EH/EM Operation Manual
164
7.4. MANUAL CALIBRATION WITH ZERO/SPAN VALVES
Zero and Span calibrations using the Zero/Span Valve option are similar to that described in Section 7.2, except
that:
Zero air and span gas is supplied to the analyzer through the zero gas and span gas inlets rather than
through the sample inlet.
The zero and cal operations are initiated directly and independently with dedicated keys (
CALZ &
CALS
)
If both available iDAS parameters for a specific gas type are being reported via the instruments analog outputs
e.g. NXCNC1 and NXCNC2, separate calibrations should be carried out for each parameter.
Use the LOW button when calibrating for NXCNC1
Use the HIGH button when calibrating for NXCNC2.
See Section 6.13.3 & 6.13.4 for more information on analog output reporting ranges
STEP ONE
: Connect the sources of zero air and span gas to the respective ports on the rear panel (Figure 3-1)
as shown below.
VENT here if input
is pressurized
Source of
SAMPLE Gas
PUMP
MODEL
200EH/EM
Sample
Exhaust
Span Point
Zero Air
Calibrated NO
at HIGH Span
Concentration
Filter
External Zero
Air Scrubbe
r
VENT
MODEL 700
Gas Dilution
Calibrator
MODEL 701
Zero Gas
Generator
Figure7-4: Pneumatic Connections–With Zero/Span Valve Option (50)
04521C (DCN5731)