Range Menu - Teledyne 6400A Instruction Manual

Sulfur dioxide analyzer
Table of Contents

Advertisement

TAI Model 6400A SO
<PRM and PRM> will appear. These buttons are used to scroll through the parameters located
in each record.
The function of each of the default Data Channels is described below:
CONC:
Samples SO
hour with a time and date stamp. Readings during calibration and calibration
hold off are not included in the data. The last 800 hourly averages are stored.
PNUMTC:
Collects sample flow and sample pressure data at five minute intervals and
stores an average once a day with a time and date stamp. This data is useful for
monitoring the condition of the pump and critical flow orifice (sample flow)
and the sample filter (clogging indicated by a drop in sample pressure) over
time to predict when maintenance will be required. The last 360 daily averages
(about 1 year) are stored.
Logs new slope and offset every time a zero or span calibration is performed.
CALDAT:
This Data Channel also records the instrument reading just prior to performing
a calibration. Note: this Data Channel collects data based on an event (a
calibration) rather than a timer. This Data Channel will store data from the last
200 calibrations. This does not represent any specific length of time since it is
dependent on how often calibrations are performed. As with all Data Channels,
a time and date stamp is recorded for every data point logged.

5.3.4 Range Menu

The instrument operates on any full scale range from 50 to 20,000 ppb. The range is the
concentration value that equals the maximum voltage output on the rear panel of the instrument.
If the range you select is between 50 and 2000 ppb the front panel will read the concentration
anywhere from 0 to 2000 ppb regardless of the range selected. If the range selected is from 2001
to 20,000 ppb the front panel will read from 0 to 20,000 ppb. The apparently wider range of front
panel readouts is because the 6400A has 2 internal hardware gain settings, namely 0-2000ppb
(gain of 10) and 0-20,000ppb (gain of 1). If the physical gain changes, then the test measurement
readings such as PMT, DARK PMT, and OFFSET will be adjusted accordingly. The analog
output is scaled for the range selected, however the front panel reading can display correct
concentrations over the entire physical range. If the instrument will be used on more than one
range such as AUTO RANGE or DUAL RANGE, it should be calibrated separately on each
applicable range (see Section 7.9 for calibration procedure).
Analyzer Operator Manual, 02164, Rev. G
2
concentration at one minute intervals and stores an average every
2
5-13

Advertisement

Table of Contents
loading

Table of Contents