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Operating Instructions
Model 400E Ozone Analyzer
Instruction Manual
66
P/N 04316 Rev: B
6.3.6.
Communications Menu (COMM)
The M400E comes with 2 serial communications ports located on the rear panel.
The serial communication ports can be configured to use several different
communications protocols. By default the COM1 port is setup to use RS-232 and
COM2 port is configured to be a half-duplex, RS-485 port.
See Section 6.9 for more information on setting up the analyzer’s COM Ports.
6.3.7.
M400E Internal Variables
The M400E has several user adjustable software variables that can be used to
manually set certain operational parameters normally automatically set by the
instruments firmware. These are:
Table 6-4: Variable Names (VARS)
Variable
Description
Legal Values
DAS_HOLD_OFF
Changes the Internal Data Acquisition System (iDAS)
Holdoff timer:
No data is stored in the iDAS channels during
situations when the software considers the data to be
questionable such as during warm up of just after the
instrument returns from one of its Calibration mode to
SAMPLE Mode.
May be set for
intervals between 0.5
– 20 min
Default=15 min.
PHOTO_LAMP
Allows adjustment of the temperature set point for the
Photometer UV Lamp in the Optical Bench.
DO NOT
change this set point unless specifically
instructed to by T-API Customer Service Personnel.
0
°
C - 100
°
C
Default= 58
°
C
O3_GEN_LAMP
(1)
Allows adjustment of the temperature set point for the
UV Lamp in the O
3
Generator Option.
(1)
DO NOT
change this set point unless specifically
instructed to by T-API Customer Service Personnel.
0
°
C - 100
°
C
Default= 58
°
C
O3_GEN_LOW1
(1)
Allows adjustment of the O
3
Generator Option for the
Low (Mid) Span Calibration point on
RANGE1
(2)
during
3-Point Calibration Checks.
(1)
See Section 7.5 for more information.
0 ppb – 1500 ppb
Default = 100 ppb
O3_GEN_LOW2
(1)
Allows adjustment of the O
3
Generator Option for the
Low (Mid) Span Calibration point on
RANGE2
(3)
during
3-Point Calibration Checks.
(1)
See Section 7.5 for more information.
0 ppb – 1500 ppb
Default = 100 ppb
O3_SCRUB_SET
(1)
Includes:
O3_SCRUB_SET(LO)
&
O3_SCRUB_SET(HI)
Allows adjustment of the temperature set point for the
heater attached to the Metal Wool Scrubber option
along with set points for both the High and Low alarm
limits for the heater.
(1)
DO NOT
change this set point unless specifically
instructed to by T-API Customer Service Personnel
0
°
C - 200
°
C
Default= 110
°
C