Teledyne T101, Operation Manual, Page: 81 / 375

Teledyne ML – T101 Operation Manual Operating Instructions
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4.5. SETUP – VARS: USING THE INTERNAL VARIABLES
The T101 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 Table 4-7 lists variables that
are available within the 818 password protected level.
Table 4-7. Variable Names (VARS)
NO. VARIABLE DESCRIPTION
ALLOWED
VALUES
0 MEASURE_MODE
Selects the gas measurement mode in which the instrument
is to operate. SO
2
only, H
2
S only or dual gas measurement
of SO
2
and H
2
S simultaneously. Dual gas mode requires
that a special switching option be installed (see Sections
4.5.1 and 10.3.2).
SO
2
;
SO
2
– H
2
S;
H
2
S
1 CAL_GAS
Used to select the calibration gas (SO
2
or H
2
S) or to select
default behavior (DEF) where valve position and slope-
offset are same.
DEF, SO2 , H2S
2 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.
3 TPC_ENABLE
Enables or disables the temperature and pressure
compensation (TPC) feature.
ON/OFF
4 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
. (Section 10.1.2).
Do not adjust this setting unless under the direction of
Teledyne ML’s Technical Support personnel.
30º C - 70º C
Default= 50º C
5 IZS_SET
Sets the IZS option temperature. Increasing or decreasing
this temperature will increase or decrease the permeation
rate of the IZS source.
30º C - 70º C
Default= 50º C
6 DYN_ZERO
Dynamic zero automatically adjusts offset and slope of the
H
2
S response when performing a zero point calibration
during an AutoCal (Section 6).
ON/OFF
7 DYN_SPAN
Dynamic span automatically adjusts slope and slope of the
H
2
S response when performing a zero point calibration
during an AutoCal (Section 6).
Note that the DYN_ZERO and DYN_SPAN features are not
allowed for applications requiring EPA equivalency.
ON/OFF
8 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
9 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
10 SERVICE_CLEAR Resets the service interval timer. OFF/ON