Operating the Calibrator Teledyne API T703/T703U Calibrator Operation Manual
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4.10. SETUP MORE VARS: INTERNAL VARIABLES (VARS)
The T703/T703U 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.
The following table lists all variables that are available within the 818 password
protected level. See Appendix A for a detailed listing of all of the variables that are
accessible through the remote interface.
Table 4-11: Variable Names (VARS)
NO. VARIABLE DESCRIPTION
ALLOWED
VALUES
DEFAULT
VALUES
0
PHOTO_LAMP
1,2
Sets the photometer lamp temperature set
point and warning limits.
0ºC and 100ºC
58ºC
Warning limits
56ºC - 61ºC
1
O3_GEN LAMP
1,2
Sets the O
3
generator lamp temperature set
point and warning limits.
0ºC and 100ºC
48ºC
Warning limits
43ºC - 53ºC
2
O3_CONC_RANGE
Set the upper span point of the O
3
concentration range for TEST CHANNEL
analog signal O3_PHOTO_CONC.
0.1–20000 ppb 500 ppb
3
O3_PHOTO_BENCH_ONLY
2
O
3
bench control flag.
ON turns on the photometer pump and
switches measure/reference valve only
when the O
3
mode is set for BNCH (See
Section 3.4.5).
ON/OFF
OFF
4
ZA_PUMP_ENAB
2
Internal zero air pump control.
ON turns on internal zero air pump when
generating ozone.
ON/OFF
ON
5
STD_TEMP
1
Sets the standard Temperature used in
calculating O
3
flow rates and concentrations.
0ºC and 100ºC 25ºC
6
STD PRESS
1
Sets the standard pressure used in
calculating O
3
flow rates and concentrations.
29.92 in-Hg-A
15.00 – 50 .00
in-Hg-A
7
CLOCK_ADJ
Adjusts the speed of the instrument’s clock.
Choose the + sign if the clock is too slow,
choose the - sign if the clock is too fast (See
Section 4.7.2).
-60 to +60 s/da
y
Default=0
0
8
SERVICE_CLEAR
Restarts interval timer since instrument’s last
service, by setting the value to ON. (The
system then resets it to default OFF).
ON/OFF OFF
9
TIME_SINCE_SVC
Time since last service (in hours).
0-500000 0
10
SVC_INTERVAL
Sets the interval between service reminders
(in hours).
0–100000 0
1
DO NOT ADJUST OR CHANGE these values unless instructed to by Teledyne API’s Technical Support personnel.
2
Only available in calibrators with O
3
photometer and generator options installed.
NOTE:
There is a 2-second latency period between when a VARS value is changed and the new value is stored
into the instrument’s memory. DO NOT turn the instrument off during this period or the new setting will
be lost.
