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P
NEUMATIC
This section presents the pneumatic input and output connections; Section 2.4.3 presents
the pneumatic flow diagrams.
Note
About Diluent Gas (Zero Air)
Zero Air is similar in chemical composition to the Earth's atmosphere but scrubbed of all
components that might affect the calibrator's readings.
•
Diluent Air should be dry (approximately -20ºC of Dew Point).
Diluent Air should be supplied at a gas pressure of between 25 PSI and 35 PSI with a
•
flow greater than the flow rate for the calibrator. For the standard unit this means
greater than 10 SLPM.
For calibrators with the 20 SLPM diluent flow option the diluent air should be supplied
•
at a gas pressure of between 30 PSI and 35 PSI.
T750 calibrators with optional O
•
supply gas flowing at a continuous rate of at least 100 cm
If the calibrator is also equipped with an internal photometer, the zero air source
•
supply gas must be capable of a continuous rate of flow of at least 1.1 SLPM.
Zero Air can be purchased in pressurized canisters or created using a Teledyne API's
Model 701 Zero Air Generator.
About Calibration Gas
Calibration gas is a gas specifically mixed to match the chemical composition of the type
of gas being measured at near full scale of the desired measurement range. Usually it is a
single gas type mixed with N
gases are also available (e.g. H
Calibration gas should be supplied at a pressure of between 25 PSI and 35 PSI with
•
a flow greater than the flow rate for the calibrator.
NIST T
RACEABLE
All calibration gases should be verified against standards of the National Institute for
Standards and Technology (NIST). To ensure NIST traceability, we recommend acquiring
34
C
ONNECTIONS
Each time the pneumatic configuration is changed for any
purpose, a backpressure compensation calibration must be
performed (Section 6.2.3).
CAUTION – RISK OF INHALATION AND ASPHYXIATION
When this calibrator is used to generate ozone (O
properly vented outside the room or enclosure. Follow connection
illustrations and instructions carefully.
CAUTION – Avoid Damage to the Instrument
Do not operate this instrument without first removing dust plugs
from inlet and outlet/exhaust ports!
generators installed require that the zero air source
3
although bottles containing multiple mixtures of compatible
2
S, O
and CO mixed with N
2
2
C
G
S
ALIBRATION
AS
3
/min.
).
2
TANDARDS
), it must be
3
083730750B DCN8606
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Troubleshooting
