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_LAMP1,2 Sets the photometer lamp temperature set
point and warning limits. 0ºC and 100ºC
58ºC
Warning limits
56ºC - 61ºC
1 O3_GEN LAMP1,2 Sets the O3 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 O3
concentration range for TEST CHANNEL
analog signal O3_PHOTO_CONC.
0.1–20000 ppb 500 ppb
3 O3_PHOTO_BENCH_ONLY2
O3 bench control flag.
ON turns on the photometer pump and
switches measure/reference valve only
when the O3 mode is set for BNCH (See
Section 3.4.5).
ON/OFF
OFF
4 ZA_PUMP_ENAB2 Internal zero air pump control.
ON turns on internal zero air pump when
generating ozone.
ON/OFF
ON
5 STD_TEMP1 Sets the standard Temperature used in
calculating O3 flow rates and concentrations. 0ºC and 100ºC 25ºC
6 STD PRESS1 Sets the standard pressure used in
calculating O3 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/day
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 O3 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.
07223C DCN6572