15
Control
To tare the instrument:
unit_id
V
duration
duration
is the time in milliseconds, to collect values for calculating the tare offset. The value
is a positive integer from 1–32767.
Example:
aV 1000
(tares instrument A, with the offset calculated over 1 second)
Autotare
If autotare is enabled (controllers only), the instrument will automatically zero its measurement
after being at a 0 setpoint for 2 seconds.
To read the current autotare configuration
:
unit_id
ZCA
To enable autotare
:
unit_id
ZCA 1
To disable autotare
:
unit_id
ZCA 0
Active Gas
BASIS 2 instruments are calibrated to measure any of 9 gases:
#
Short Name
Long Name
0
Air
Air (Clean Dry)
1
Ar
Argon
2
CO
2
Carbon Dioxide
3
N
2
Nitrogen
4
O
2
Oxygen
5
N
2
O
Nitrous Oxide
6
H
2
Hydrogen
7
He
Helium
8
CH
4
Methane
To read the active gas
:
unit_id
GS
To set the active gas
:
unit_id
GS
gas_number
gas_number
is an integer from the table above.
Example:
aGS 8
(flow methane on instrument A)
When reading or setting the active gas, the data reported will be:
unit _ id gas _ number gas _ name
Totalizer Reset
The instrument totalizer can measure the total flow that has passed through the instrument
since it was powered on or since it was last reset. The totalizer value is returned as part of
the data frame (see
). Totalizer counts are reset if power to the instrument is lost.
To reset the total volume
:
unit_id
T
Totalizer Batch
Batch dispensing flows a set volume of gas, after which the valve will close and the flow will
stop (controllers only).
To read the remaining batch volume
:
unit_id
DV 64
To set the totalizer batch
:
unit_id
TB
batch_volume
batch_volume
is a floating-point value, in instrument volume units.
To disable the batch function
:
unit_id
TB 0
