Panametrics XMO2 - 3.4 Analog output calibration options; 3.5 Factory calibration procedures

3.4 Analog output calibration
options
The XMO2 4-20 mA analog output has been calibrated at
the factory for the oxygen range indicated on the XMO2
Calibration Sheet shipped with the unit. (Figure 9 on page 15
shows a typical calibration sheet.) Upon initial startup, field
verification and/or calibration of the 4-20 mA analog output
is required. To perform this task, either of the following
procedures may be used:
• Pushbutton calibration (offset gas method)
• IDM digital communication calibration (zero/span gas
method)
This section provides information on calibrating the XMO2
in the field using either a one-gas (offset gas) method or
a two-gas (zero gas and span gas) method. The following
specific topics are discussed:
• Factory calibration procedures
• Updating the factory calibration
• Required calibration materials
• Getting the XMO2 ready and locating the calibration
switches
• How to perform a one-gas (Offset Gas) or two-gas (Zero
and Span Gas) Pushbutton calibration
• How to perform an IDM digital communication
calibration
After the XMO2 is in operation, field calibration is
recommended at intervals of about 1-3 months, depending
on the application.
3.5 Factory calibration procedures
Prior to shipment, your XMO2 was calibrated at the factory
for the %O2 range specified at the time of purchase. The
following standard %O2 ranges are available:
• 0 to 1% • 0 to 5% • 0 to 21% • 0 to 50%* • 80 to 100%*
• 0 to 2% • 0 to 10% • 0 to 25% • 0 to 100%* • 90 to 100%*
* Pressure compensation is required
In addition, your XMO2 was calibrated at the factory for the
compensation signal specified at the time of purchase. The
following standard compensation signals are provided:
• Background Gas Compensation - the standard factory
calibration uses N
2
and CO

as the background gases.
• Pressure Compensation - the standard factory
calibration is for atmospheric pressure (700-800 mm of
Hg).
Note: Compensation signals are available for special
background gases and/or special pressure ranges.
For availability, pricing, and delivery, please contact
Panametrics.
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