MultiExact Gas Analyser
2 – Specification
TCD transducer calibration gases
High Calibration setpoint
90 – 110% of range**
Low Calibration setpoint
-10 – 10% of range**
Minimum Calibration difference
between low and span
85% of range**
Low Calibration tolerance level *
± 10%
High Calibration tolerance level *
± 10%
* Range and background gas as per analyser specification.
N
2
O, CO, CO
2
and CH
4
trace transducer calibration gases
High calibration setpoint
40 to 120% of full scale (80 to 110% pref)
Low calibration setpoint
0% (zero grade nitrogen recommended)
Minimum calibration difference
between low and span
8% of full scale
Low calibration tolerance level *
± 10% of full scale
High calibration tolerance level *
± 20% of full scale
O
2
trace transducer calibration gases
High calibration setpoint
18 to 25% O
2
Low calibration setpoint
#
0.01 ppm to 5000 ppm O
2
Minimum calibration difference
between low and span
17.5% O
2
Low calibration tolerance level *
± 10% O
2
High calibration tolerance level *
± 10% O
2
#
The low calibration gas must be a high quality certified mixture (usually nitrogen N6.0)
containing trace Oxygen. Mixtures between 1000 ppm to 4000 ppm are preferred.
* If, during a calibration or validation routine, the measurement is outside the specified range,
a status message is displayed to indicate that there may be a problem (for example, the
wrong calibration gas has been introduced, or the transducer has drifted excessively). The
status can be over-ridden but the history will still remain.
**
Range and background gas as per analyser specification
. For optimal performance use
either low or high calibration point to be a single component gas.
05410001A / Revision 6
9
