E Instruments BTU900 Manual page 59

•
Apply the gas to the instrument and regulate the cylinder output pressure so that the flow meter shows a
minimum flow (0,5 l/m) this ensures that the instrument is getting exactly the gas needed by its internal pump.
•
The instrument measures the concentration of the applied gas; w ait at least 3 minutes for the measure to
stabilize. The reading is shown in the ' M easured' row.
CO CALIBRATION
Action calibrate
►Applied 1000.0
Measured Measured Measured Measured 990.5 990.5 990.5 990.5
Is 82.22 uA
Ia 10.17 uA
Status original
•
Whenever the reading is not satisfactory, proceed with the recalibration; Select the concentration of the applied
gas (cylinder concentration) in the ' A pplied' row.
CO CALIBRATION
Action calibrate
►Applied Applied Applied Applied 1022.0 1022.0 1022.0 1022.0
Measured 990.5
Is 82.22 uA
Ia 10.17 uA
Status original
•
Select 'Calibrate' in ' A ction' row.
CO CALIBRATION
►Action Action Action Action calibrate calibrate calibrate calibrate
Applied 1022.0
Measured 990.5
Is 82.22 uA
Ia 10.17 uA
Status original
•
Depress the ' ' key to save the new calibration.
CO CALIBRATION
►Action calibrate
Applied 1022.0
Measured 990.5
Is 82.22 uA
Ia 10.17 uA
Status Status Status Status cal ok cal ok cal ok cal ok
It is always possible to bring back the original calibration w ith the action 'set original' and bring back the
last on-site calibration with 'set-user'.
K8000 000 00EJ 02 065 0A0 17 051 2
P
P P P P
P P P P
With
P
row.
P
P
The recalibration result will be shown in the 'Status' row:
'CAL OK':
'CAL ERROR': sensor not recalibrated due to:
P
P
keys set the cylinder concentration in the 'Applied'
sensor recalibrated successfully
- The gas was not correctly delivered to the
instrument.
- The applied gas concentration was not correctly
set in the 'Applied' row.
- The 3 minutes stabilization time was not
observed.
- The sensor might be damaged or exhausted and
needs to be replaced.
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