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P/N 06160D DCN6409 Teledyne API Model 465M O
3
Monitor Instruction Manual - Page 40
7.2.5. SETUP-VARS Menu
The VARS menu allows viewing and editing of various global setup variables that effect
how the M465M operates. These variables are stored in the instrument’s non-volatile
memory. Table 7-6 lists these variables and their function.
Table 7-6: VARS List
VAR Meaning
Default
Value
Range
ALARM MODE
Controls the latching behavior of
the concentration alarms. See
Section 7.1.3 for additional
details.
LATCHING
LATCHING,
NON-
LATCHING
ALARM DELAY
Number of readings above alarm
limit required to trigger alarms
5 1 - 20
BC FILT SIZE
Boxcar filter length for
concentration filter. Higher
values will smooth out the
concentration readings but will
also increase the response time.
30 1 - 30
FLOW SWITCH
ENABLE
Enables/disables operation of
optional flow switch
OFF ON, OFF
COMM ADDRESS
MODBUS address for COM
ports.
1 1 - 247
UNIT
Concentration unit-of-measure
setting.
PPM
PPM, WT%,
g/Nm
3
SCROLL DELAY
Adjustment for display scroll
delay. Higher values result in
slower scrolling speed.
20 6 - 100
AZERO ENABLE
Enables/Disables auto-zero
calibration
ON ON/OFF
AZERO INTERVAL
Time interval for performing the
auto-zero calibration (minutes)
6 3 - 1440
GAS CARRIER
WEIGHT
Molecular weight of carrier gas
(ie. feed gas for ozone
generator.) This value is only
used for the calculation of wt%
concentration units. It is not
used for PPM or g/Nm3
calculations.
32 20.0 – 40.0
ANALOG RANGE
Full-scale concentration range.
Used to scale the analog output.
5000
5 – 50 g/Nm3
1000 – 9999 PPM
0.5 – 5.0 wt%