E Instruments BTU900 - Page 59

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K800000000EJ 020650A0 170512
• 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; wait at least 3 minutes for the measure to
stabilize. The reading is shown in the 'Measured' row.
• Whenever the reading is not satisfactory, proceed with the recalibration; Select the concentration of the applied
gas (cylinder concentration) in the 'Applied' row.
• Select 'Calibrate' in 'Action' row.
• Depress the ' ' key to save the new calibration.
Action calibrate
►Applied 1000.0 P
Measured 990.5
Measured 990.5 Measured 990.5
Measured 990.5 P
PP
P
Is 82.22 uA
Ia 10.17 uA
Status original
CO CALIBRATION
Action calibrate
►Applied 1022.0
Applied 1022.0 Applied 1022.0
Applied 1022.0 P
PP
P
Measured 990.5 P
Is 82.22 uA
Ia 10.17 uA
Status original
CO CALIBRATION
With keys set the cylinder concentration in the 'Applied'
row.
►Action calibrate
Action calibrateAction calibrate
Action calibrate
Applied 1022.0 P
Measured 990.5 P
Is 82.22 uA
Ia 10.17 uA
Status original
CO CALIBRATION
The recalibration result will be shown in the 'Status' row:
'CAL OK': sensor recalibrated successfully
'CAL ERROR': sensor not recalibrated due to:
- 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.
►Action calibrate
Applied 1022.0 P
Measured 990.5 P
Is 82.22 uA
Ia 10.17 uA
Status cal ok
Status cal okStatus cal ok
Status cal ok
CO CALIBRATION
It is always possible to bring back the original calibration with the action 'set original' and bring back the
last on-site calibration with 'set-user'.
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