Ecotech Serinus 51 - 4.3 H2 S Efficiency; 4.4 Multipoint Calibration

Calibration Serinus 51 User manual 1.0
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7. Enter the quick menu and select “Span Calibration”
8. A box will appear with editable numbers, select the concentration being
delivered to the instrument
9. Instrument will perform Span calibration, when finished the instrument will
return to normal activities
Sample port
1. Ensure suitable span gas (SO2) source is connected to the “Sample Port” on
the back panel of analyzer (see section 2.3.1)
2. Enter Main Menu  Measurement Settings menu  Gas to Measure and set
this field to SO
2
3. Set the span source to a known concentration
4. Let the instrument stabilize (15 minutes)
5. Enter the quick menu and select “Span Calibration”
6. A box will appear with editable numbers, select the concentration being
delivered to the instrument.
7. Instrument will perform Span calibration, when finished the instrument will
return to normal activities
4.3 H
2
S Efficiency
After a span calibration has been performed follow this procedure to accurately
determine the H
2
S (converter and scrubber) efficiency.
1. Ensure the H
2
S efficiency is set to 100%
2. Connect a source of H
2
S span gas to the calibration port
3. Enter Main Menu  Measurement Settings menu  Gas to Measure and set
this field to H
2
S
4. Allow H
2
S readings to stabilize (30 minutes) and record the concentration
displayed on the main screen.
5. Set the span source to a known concentration (80% full scale recommended)
6. Calculate the H
2
S efficiency by dividing the recorded concentration with the
expected concentration i.e. expected = 100ppb, recorded = 80 ppb
80/100 = 80% H
2
S efficiency
7. Update the H
2
S efficiency in the following menu: Main menu  Calibration
menu  H
2
S Efficiency
8. Return the instrument setting for normal measurement i.e. Gas to measure
field
4.4 Multipoint Calibration
The multipoint involves supplying the instrument with span gas at multiple known
concentrations and recording the output of the instrument. Multipoint calibrations are
used to determine the linearity of concentration curve; the instrument gain should not
be adjusted to each individual point.
1. Ensure a suitable span source is connected to instrument from a gas calibrator
(Ecotech recommends the GasCal 1100) through the sample port
2. Record analyzer instrument gains before performing calibration (section 3.5.1)