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•
The table below assumes the use of 5mm ID Tygon pipe.
Pipe length
100mm
200mm
300mm
400mm
500mm
600mm
•
Minimum gas concentration is 2 ppm. Demand flow regulators must be used to supply
gas to the Calibration Dock. They must be able to supply 0.3 liters per minute (300
ml/min). The Dock draws as much gas as it needs from the regulator (around 200
ml/min).
2. On the
Cubs
page, click this button for the Cub being calibrated:
•
The calibration procedure is then initiated. The Calibration Dock then pumps Zero gas
and then Span gas to the sensor. If the calibration is successful, a date/time stamp will
appear in the Calibration column. Readings will appear in green.
•
If calibration fails, readings will appear in red and a message will be displayed giving the
reason for the failure:
o Invalid: when the Cub is initially connected to the Docking Station this message will
appear to advise the user that the Cub does not have a valid calibration.
This error also appears if a communication error occurs during calibration.
o Span too low: the span gas concentration is not sufficient.
o Zero too high the zero reading is too high, such as when drawing in dirty air.
o Lamp fail: the lamp failed to strike.
•
If a calibration is invalid, the Cub will revert to the previous calibration.
Remote Calibration
The following equipment is required.
•
A clean ambient air supply or a bottle of compressed synthetic air fitted with a 0.3 liter per
minute flow regulator (1).
•
A bottle of compressed Span gas fitted with a 0.3 liter per minute flow regulator (1).
•
Remote calibration adaptor (3).
•
Suitable pipe (Tygon) to connect gases to the remote calibration adaptor (2).
Unrivaled Gas
Detection.
Zero Time (sec)
10
12
14
16
18
20
Page 33 of 49
Cub Instrument User Manual V2.5
Span Time (sec)
22
24
26
28
30
32
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