Instruction manual

20
5.6.5. To find out the total running-time since the heat-pulse was fired (loc. 99)
enter *6 99 A
enter *0 to continue
5.6.6. To change the duration of the heat pulse (alter Inst-44)
enter *1 44 A A A x A *0 where x is duration in s
default value is 2.0 s (this is also the maximum time)
5.6.7. To change the delay between firing a heat pulse and testing for a 'cross-over'. This
may be necessary for really fast flows (alter Inst-49)
enter *1 49 A A A x A *0 where x is delay in multiples of 0.1s
default value is 15 s, i.e. x=150
5.6.8. To change the maximum time for a
t
z
calculation (alter Inst-14)
enter *1 14 A A A x A where x is max time in multiples of 0.1s
default value if 500 s, i.e. x=500, but 300s might be OK
5.7. Listing of the logger program - C10-HP3.CSI
This section gives a listing of the CAPTURE program designed to measure the outputs
generated by the HPV unit, and to calculate and store the
t
z
’s associated with each set of
the probes. The program is rather basic (in keeping with our philosophy). It is located in
the subdirectory A:\LOGGER on the installation disk provided. This programme was
compiled using the latest version of EDLOG. As a result, the program may not install and
run properly if the old version of EDLOG and GT is used. However, if any problems do
occur then it is a simple matter to enter the following program by hand, via the keypad,
and subsequently retrieve it back using the GT (or TERM) program.
Note: For the program to run, the USER needs to enter the *A mode and reset the
number of final output locations to 100.
;{CR10}
*Table 1 Program
01: 0.2500 Execution Interval (seconds)
1: If time is (P92)
Flag 1
is used to activate automatic sampling
1: 0 Minutes (Seconds --) into a once every 30 mins.
2:
30 Interval (same units as above)
Change as required
3: 11 Set Flag 1 High
2: If Flag/Port (P91)
Flag 5
is set when
t
z
is calculated
1: 15 Do if Flag 5 is High
2: 30 Then Do
3: Timer (P26) store current time in loc (99)