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Frequently Asked Questions
8. How do I make the intrument's display and my datalogger agree?
This most commonly occurs when an independent metering device is used
besides the datalogger/recorded to determine gas concentration levels while
calibrating the analyzer. These disagreements result from the analyzer, the
metering device and the datalogger having slightly different ground levels.
It is possible to enter a DC offset in the analog outputs to compensate. This
procedure is located in Section 6.7.3.2 of this manual.
Alternately, use the datalogger itself as the metering device during calibration
procedures.
9. When should I change the Particulate Filter and how do I change it?
The Particulate filter should be changed weekly. See Section 9.3.1 for
instructions on performing this replacement.
10.When should I change the Sintered Filter and how do I change it?
The Sintered Filter does not require regular replacement.
Should its replacement be required as part of a troubleshooting or repair
exercise, see Section 11.6.1 for instructions.
11.When should I change the Critical Flow Orifice and how do I change it?
The Critical Flow Orifice does not require regular replacement.
Should its replacement be required as part of a troubleshooting or repair
exercise, see Section 11.6.1 for instructions.
12.How do I set up and use the Contact Closures (Control Inputs) on the Rear Panel
of the analyzer?
See Section 6.8.2.
13.Can I automatically calibrate or check the calibration of my analyzer?
Any analyzer into which a Zero/Span Valve Option can be automatically
calibrated using the instrument's AutoCal Feature.
Be aware that while the AutoCal feature can be used with the IZS Option to
perform Calibration Checks, The IZS should never be used to perform
Calibrations.
See Section 7.6 for instructions on setting up and activating the AutoCal feature.
44
Model 400E Ozone Analyzer
Instruction Manual
P/N 04316 Rev: B
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