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SSM 6000
CONT
The process of calibrating the SSM 6000 consists of the following steps:
Rinsing the gas ducts and pipes with ambient air in order to record the sensor zero points
-
Determining the sensor sensitivity values using biogas / calibration gas
-
Rinsing the system using filtered ambient air.
-
The calibration gas is applied through the biogas inlet. The hose must be disconnected from the inlet of the analyzer for this purpose.
In order to prevent biogas from escaping, the biogas outlet of the plant should be closed.
Before starting the calibration / span gas check a span gas cylinder with pressure reducer has to be ready and adjusted to a
maximum outlet pressure of 0.2bar. The pressure has to be readjusted during calibration in order to keep the floating body of the
flow metre "flow1" within the mark (50...65l/h). Ensure to have a little positive pressure (10...100mbar) at the back pressure gauge of
the span gas cylinder when feeding the span gas.
7.3
Recording the actual condition
In order to be able to assess the precision of the last biogas measurements, the actual condition of the device should be recorded
prior to calibration. At least one calibration gas measurement must be performed for this purpose.
Proceed as follows for a single measurement using calibration gas.
Disconnect the biogas hose from the measuring-gas inlet.
-
Close the biogas outlet of the plant.
-
Connect calibration gas with a maximum admission pressure of 0.2 bar to the calibration-gas inlet.
-
Start a single measuring process.
-
SETUP MODE:
_ MEASUREMENT
_ CALIBRIATION
_ SYSTEM
Check and, if necessary, readjust flow rates.
-
The single measurement is now performed automatically.
Since calibration of the analyzer only makes sense if the sensors are working properly, the digitized sensor signals should be
checked using calibration gas and ambient air after a single measurement. The results should then be checked for plausibility as
described in the "Sensor data" section.
SENSOR:
30.0 C
1: 600 4: 400 7:
0
2: 400 5: 434 8:
0
3: 780 6:1010 9:
0
Larger deviations, such as a zero value of 1023, indicate a defect of the respective gas channel. Calibration of the gas type in
question does not help in such a case. Please contact the manufacturer in cases like this.
800C-07.07.EN
MEAS. OPTIONS:
_ MEAS. INTERVAL
_ ALERT VALUES
_ SINGLE MEAS
For this purpose, select the
Device options
setup mode. Connect the calibration gas to the measuring input, read the values displayed after
around 2 minutes, and record these values in the calibration report.
Thereafter, disconnect the calibration gas hose, so that ambient air is drawn in through the inlet.
After around 2 minutes, read the values and record these too in the calibration report.
SSM 6000C User Manual
SINGLE MEASUREMENT:
_ MEASUREPOINT 1
_ START
Data output
Sensor data
CALIBRATION
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Actual
51
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