Frequently Asked Questions & Glossary; Faq's - Teledyne 100E Instruction Manual

Model 100E Instruction Manual
4. FREQUENTLY ASKED QUESTIONS & GLOSSARY

4.1. FAQ's

The following list contains some of the most commonly asked questions relating to the
Model 100E SO Analyzer.
2
Q: Why is the ZERO or SPAN key not displayed during calibration?
A: The M100E disables certain keys whenever the chosen value is out of range for that
particular parameter. In this case, the expected span or zero value is too different
from the actually measured value and the instrument does not allow to span or zero
to that point. Chapter 11 describes this in detail.
Q: Why does the ENTR key sometimes disappear on the front panel display?
A: Sometimes the ENTR key will disappear if you select a setting that is invalid or out of
the allowable range for that parameter, such as trying to set the 24-hour clock to
25:00:00 or a range to more than 20 000 ppb. Once you adjust the setting to an
allowable value, the ENTR key will re-appear.
Q: Can I automate the calibration of my analyzer?
A: Any analyzer with zero/span valve or IZS option can be automatically calibrated using
the instrument's AutoCal feature.
However, the accuracy of the IZS option's permeation tube is ±5%. While this may be
acceptable for basic calibration checks, the IZS option is not permitted as a calibration
source in applications following US EPA protocols.
To achieve highest accuracy, it is recommended to use cylinders of calibrated span
gases in combination with a zero air source. T-API offers a zero air generator Model
701 and a gas dilution calibrator Model 700 for this purpose.
Q: What do I do if the concentration on the instrument's front panel display does not
match the value recorded or displayed on my data logger even if both instrument's
are properly calibrated?
A: This most commonly occurs for one or both of the following reasons: (1) a difference
in circuit ground between the analyzer the data logger, or (2) a scale problem with
the input to the data logger. The analog outputs of the analyzer can be manually
calibrated to compensate for either or both of these effects, see Section 6.7.4.
Q: How do I measure the sample flow?
A: Sample flow is measured by attaching a calibrated flow meter to the sample inlet port
when the instrument is operating. The sample flow should be 500 cm³/min ±10%.
Chapter 11 includes detailed instructions on performing a check of the sample gas
flow.
Q: How often do I need to change the particulate filter?
A: Once per week. Table 9-1 contains a maintenance schedule listing the most
important, regular maintenance tasks.
045150102 Rev XB1
Frequently Asked Questions & Glossary
45