wtw TresCon NOx-N, Operating Manual

Page: 23 / 112

NOx-N Operation
2 - 3 ba43110e05 01/2011
2.1 Measuring
The outlet of the measuring procedure can be continuous or
discontinuous. The setting is performed in the Interval Program menu.
If you define a measuring interval in the
Interval program menu,
measurement is performed non continuously. If you select Cont. ,
measurement will be continuous.
Note
The type of measuring and the intervals are specified in the Interval
Program menu (See “D
ISPLAYING
/
CHANGING THE INTERVAL PROGRAM
PARAMETERS
” on page 2-20.).
Continuous
measurement
The measuring procedure consists of a sequence of several steps that
are listed in the following overview. Subsequently, the TresCon NOx-N
remains in the "measuring" mode. The measured value is continuously
updated.
*This display only appears on the screen during measuring after
calibration or after the "Stop" mode. Otherwise, only the measured
value is displayed.
Duration Approx. 1 ½ minutes
Discontinuous
measurement
The measuring procedure consists of a sequence of several steps that
are listed in the following overview. Subsequently, the TresCon waits
for the start of the next measuring procedure. During this time the last
measured value is displayed.
Step Instrument status/action Display*
1 Rinse sample Rinse sample
2 Feeding sample Rinse sample
4 Measuring the sample Measurement
5 Continuous measurement Continuously
updated measured
value
Program operating
sequence
Step Instrument status/action Display
1 Rinse sample Old measured value
2 Feeding sample Old measured value
3 Measuring the sample
Calculating the mean value from the
last 10 individual measurements Old measured value
4 Display of the mean value Measured value, new
Program operating
sequence