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172-082010_400 I Series Software Page 21 of 35
hexadecimal digits. Each hexadecimal pair is the hexadecimal ascii code for a
character to transmit as part of the “end of transmission” message.
item 68:serial number: Comply-3
read S68(cr) or *[aa]S68(cr)
Sample reply: 1024500001(cr)>
This is the serial number of this particular instrument. This value must match the
serial number printed on the label on the side of the instrument. Do Not Change This.
item 69:A/D#0 offset:
read S69(cr) or *[aa]S69(cr)
Sample reply: V0.1000(cr)>
write S69=5(cr) or *[aa]S69=0.005(cr)
This item stores the offset value that is used to calibrate the analog input to the
desired zero flow value. This value is adjusted to make set-point analog/digital
converter read correctly when a minimum scale input signal is being applied.
item 70: A/D#1 offset:
Reserved for future use
Item 112: Enable verbose replies
read S112(cr) or *[aa]S112(cr)
Sample reply: 0(cr)>
write S112=1(cr) or *[aa]S112=1(cr)
This item does not show in the sensor list. But setting S112 equal to 1 will cause all of
the responses from the instrument to include some explanatory text before each data
item in the various lists and when data is requested individually. This is useful when
using a text terminal program to communicate with the instrument and an explanation
of the various list item numbers is desired.
2.4. Gas List
There are provisions for 10 different sets of gas/calibration records in these flow instruments.
At least one of them will be filled out and ready for use (record 0). Other records may be also
filled out with alternative calibrations for use with other gases or flow units if multiple
calibrations were requested on the original order. The sensor list command S6 (active gas inst)
controls which record is accessed when the gas commands are employed.
G d [=n] Set/read gas/calibration data items by item code d. The blank spaces are not
necessary and are ignored. The commands may be received in upper case or lower case. In
RS485 mode the “G” command must be preceded by an asterisk* and the address (macid).
G [d](cr) or *[aa]G [d](cr)
GL List all gas record data items, values and units
GL(cr) or *[aa]GL(cr)
Gas item number list
item 1: gas instance:
item 2: FS flow:
item 3: gas z factor:
item 4: gas symbol:
item 5: time factor: