
Model 400E Instruction Manual
APPENDIX A-2: Setup Variables For Serial I/O, Revision C.3
APPENDIX A-2: Setup Variables For Serial I/O, Revision C.3
Table A-1: M400E Setup Variables, Revision C.3
SETUP VARIABLE
NUMERIC
UNITS
DEFAULT
VALUE
VALUE RANGE
DESCRIPTION
DAS_HOLD_OFF
Minutes
15
0.5–20
Duration of DAS hold-off period.
PHOTO_LAMP
ºC Warnings:
57–67
0–100
Photometer lamp temperature set point
and warning limits.
O3_GEN_LAMP
ºC Warnings:
43–53
0–100 O
3
generator lamp temperature set point
and warning limits.
O3_GEN_LOW1
PPB 100 0–1500
O
3
generator low set point for range #1.
O3_GEN_LOW2
PPB 100 0–1500
O
3
generator low set point for range #2.
O3_SCRUB_SET
ºC 110
Warnings:
100–120
0–200 O
3
scrubber temperature set point and
warning limits.
CLOCK_ADJ
Sec./Day
0
-60–60
Time-of-day clock speed adjustment.
LANGUAGE_SELECT
— ENGL
0
ENGL, SECD, EXTN Selects the language to use for the user
interface.
MAINT_TIMEOUT
Hours
2
0.1–100
Time until automatically switching out of
software-controlled maintenance mode.
CONV_TIME
— 1
SEC
0
33 MS, 66 MS,
133 MS, 266 MS,
533 MS, 1 SEC,
2 SEC
Conversion time for photometer detector
channel.
AD_MAX_DELTA
4
mV
1000
1–10000
Maximum reading-to-reading change on
any A/D channel to avoid spike
suppression.
O3_DWELL
Seconds
2
0.1–30
Dwell time after switching
measure/reference valve.
O3_SAMPLE
Samples
1
1–30
Number of detector readings to sample.
O3_STEP_THRESH
%
0.1
0–100
Changes in reference or measure
readings exceeding this threshold are
regarded as step changes.
DARK_OFFSET
mV
0
-1000–1000
Photometer dark offset for measure and
reference readings.
FILT_SIZE
Samples 32
1–100 O
3
concentration filter size.
FILT_ASIZE
Samples
6
1–100
Moving average filter size in adaptive
mode.
FILT_DELTA
PPB
20
1–1000
Absolute concentration difference to
trigger adaptive filter.
FILT_PCT
Percent
5
1–100
Percent concentration difference to
trigger adaptive filter.
FILT_DELAY
Seconds
60
0–60
Delay before leaving adaptive filter
mode.
FILT_ADAPT
—
ON
OFF, ON
ON enables adaptive filter.
OFF disables it.
USER_UNITS
— PPB
0
PPB,
PPM,
UGM,
MGM
Concentration units for user interface.
DIL_FACTOR
—
1
0.1–1000
Dilution factor. Used only if is dilution
enabled with
FACTORY_OPT
variable.
SLOPE_CONST
—
1
0.1–10
Slope constant factor to keep visible
slope near 1.
TPC_ENABLE
—
ON
OFF, ON
ON enables temperature/ pressure
compensation; OFF disables it.
O3_GEN_MODE
— CNST
0
CNST,
REF
O
3
generator control mode.
O3_GEN_SET1
PPB 400 0–1500
O
3
generator high set point for range #1.
0
4402
Rev C.3
9