16
Choosing Engineering Units from Main Mode
Press the button above or below any of the four
flow parameters twice to enter its unit selection
menu. You can change units in two ways:
Button engineering units alter the display only,
not the RS-232 / RS-485 data frame:
• Select Set button eng units and press SELECT to
change the engineering unit on the display only.
Use the UP and DOWN keys to move the > cursor
to the desired unit, and then press SET. This does
not alter the data frame.
Device engineering units
alter both the display
and the data frame:
• Select Set device eng units and then choose
the engineering unit as above. An additional
confirmation screen asks you to confirm the
RS-232 / RS-485 change.
• If the button engineering unit is different than
the device engineering unit, Set device eng units
will not appear. First select Show device eng units
to return the button unit to the existing device
unit, and then enter the unit selection menu
again to change the device engineering unit.
Examples of changing device engineering units:
SET
CANCEL
PRESSING SET WILL
AFFECT DISPLAY
AND SERIAL VALUES.
VERIFY CONNECTED
SERIAL DEVICES
EXPECT THE CHANGE.
SELECT
CANCEL
Show baro pressure
DOWN
UP
Set button eng units
Set device eng units
Show gauge pressure
Show abs pressure
>
SELECT
CANCEL
DOWN
UP
Set device eng units
Set button eng units
>
SELECT
CANCEL
DOWN
UP
Show device eng units
Set button eng units
>
#C
Air
Flow Temp
+24.38
SETPT
#C
+24.38
BARO
+704.0
#F
air
Flow Temp
+75.88
Instant
SETPT
#F
+75.88
BARO
+704.0
Changing device units:
°C is the existing device
engineering unit, so the unit
selection menu displays
Set device eng units.
Changing device units:
°F is not the existing device
engineering unit, so the unit
selection menu displays
Show device eng units.
Enter the unit selection menu
again to change the device
engineering units.
Flashing Error Message: An error message (
MOV
= mass overrange,
VOV
= volumetric overrange,
POV
= pressure overrange,
TOV
= temperature
overrange) flashes when a measured parameter exceeds the range of the
sensor. When any item flashes, neither the flashing parameter nor the
mass flow measurement is accurate. Reducing the value of the flashing parameter
to within specified limits will return the unit to normal operation and accuracy.
If the unit does not return to normal operation contact Alicat.
