Teledyne T100, Instruction Manual, Page: 99 / 404

Teledyne ML - T100 UV Fluorescence SO2 Analyzer Operating Instructions
99
The analyzer multiplies the measured gas concentrations with this dilution factor and
displays the result.
IMPORTANT
Once the above settings have been entered, the instrument needs to be recalibrated
using one of the methods discussed in Section 6.
4.7. SETUP
– VARS: USING THE INTERNAL VARIABLES
The T100 has several-user adjustable software variables, which define certain
operational parameters. Usually, these variables are automatically set by the
instrument’s firmware, but can be manually re-defined using the VARS menu. Table 4-7
lists all variables that are available within the 818 password protected level.
Table 4-7: Variable Names (VARS) Revision G.3
NO.
VARIABLE DESCRIPTION ALLOWED VALUES
0
DAS_HOLD_OFF
Changes the internal data acquisition system (DAS) hold-off time,
which is the duration when data are not stored in the DAS because
the software considers the data to be questionable. That is the
case during warm-up or just after the instrument returns from one
of its calibration modes to SAMPLE mode. DAS_HOLD_OFF can
be disabled entirely in each DAS channel.
Can be between 0.5
and 20 minutes
Default=15 min.
1 TPC_ENABLE
Enables or disables the temperature and pressure compensation
(TPC) feature (refer to Section 9.7.3).
ON/OFF
2 RCELL_SET
Sets the sample chamber temperature. Increasing or decreasing
this temperature will increase or decrease the rate at which SO
2
*
decays into SO
2
(refer to Section 9.1.1).
Do not adjust this setting unless under the direction of Teledyne
ML customer service personnel.
30º C - 70º C
Default= 50º C
3
IZS_SET
Sets the IZS option temperature. Increasing or decreasing this
temperature will increase or decrease the permeation rate of the
IZS source (refer to Sections 3.5.4, 6.5, 6.6).
30º C - 70º C
Default= 50º C
4 DYN_ZERO
Dynamic zero automatically adjusts offset and slope of the SO
2
response when performing a zero point calibration during an
AutoCal (refer to Section 6). ON/OFF
5
DYN_SPAN
Dynamic span automatically adjusts slope and slope of the SO
2
response when performing a zero point calibration during an
AutoCal (refer to Section 6).
Note that the DYN_ZERO and DYN_SPAN features are not
allowed for applications requiring EPA equivalency.
ON/OFF
6
CONC_PRECISION
Allows the user to set the number of significant digits to the right of
the decimal point display of concentration and stability values. AUTO, 1, 2, 3, 4
Default=AUTO
7 CLOCK_ADJ
Adjusts
the speed of the analyzer’s clock. Choose the + sign if the
clock is too slow, choose the - sign if the clock is too fast.
-60 to +60 s/day