2020.07.24
•
REV. 2
• MASS FLOW METER OPERATING MANUAL
33
You can change the unit ID of a polling device by typing:
Change the unit ID:
[current unit ID]
@=
[desired unit ID]
Example:
a@=b
(changes unit A to unit B)
You can also do this via the menu:
MENU
→
ADV SETUP
→
COMM SETUP
→
UNIT ID
(
). Valid unit IDs are letters A
–
Z, and up to 26 devices
may be connected at any one time, as long as each unit ID is unique.
Taring
Before collecting flow data, be sure to tare your flow meter. This can occur
serially through two separate commands. Taring flow sets the zero flow
reading and must be done when no flow is passing through the flow meter:
Tare flow:
[unit ID]
v
Example:
av
(sets flow reading to zero)
For devices equipped with a barometer, the second tare aligns the internal
absolute pressure sensor with the current barometer reading and must
be done with the flow meter open to atmosphere:
Tare absolute pressure:
[unit ID]
pc
Example:
apc
(aligns internal pressure to barometer)
Addressing All Units
Using an asterisk (
*
) will address all units on an RS-232 line, but be aware
that all units will reply back, leading to a garbled response.
Taring all devices:
*v
Do not to use this to assign an ID, as all of devices would have the same
ID. Instead, each should be individually attached to the RS-232 line, given
an ID, and taken off. After each unit has been given a unique ID, they can
all be put back on the same line and polled individually.
Collecting Flow Data
Collect live flow data by typing the
[unit ID]
command or by setting
your flow meter to streaming. Each line of data for live flow measurements
appears in the format below, but Unit ID is not present in streaming mode.
A +13.5424 +24.5782 +16.6670 +15.4443 N2
Unit ID
Temperature
Absolute
Pressure
Standard
(Mass) Flow
Volumetric
Flow
Gas
Содержание MASS FLOW METER
Страница 1: ...MASS FLOW METER OPERATING MANUAL ...
