31
Select “READ OFFSET”. QStar UFM automatically
calculates the T2 to T1 offset. On completion of this
calculation, the differential temperature T1 to T2 should
amount to approximately zero degrees. Use the “Reset
Offset” command to reset the calculated differential
temperature to zero.
Absolute thermal output measurements
(absolute measurement)
The device supports the alignment of the displayed
temperature with a reference thermometer for each tem-
perature sensor used. This functionality can be useful,
for example, for heat measurements.
i
Example: The resistance thermometer installed in
the pipe displays 348
°
F. However, the
tempera-
ture sensors of your QStar UFM displays only 343°
F. QStar UFM also supports manual adjustment of
the offset. In this case, specify a setpoint of 348
°
F.
The setpoint is an absolute value and not an offset.
Proceed as follows:
In the primary measuring window “Flow 1”:
Select
“SETUP” -> “CMPL SETUP” -> CALIBRATION SETUP
-> “PT100 T1”
Enter the absolute setpoint for T1. Caution: The setpoint
is an absolute value and not an offset in terms of the tem-
perature displayed. You can select “RESET” to delete the
setpoint for the PT100 T1. In this case the temperature
sensor will indicate the actual temperature.
Same procedure is applicable for second temperature
sensor. In this case please choose PT100 T2 in calibra-
tion menu.
MEASURING WINDOWS
THE MAIN DISPLAY “FLOW 1”
The “Flow 1” menu is the main menu that shows the
current measured values like flow and thermal output.
Opening the central measuring window “Flow 1”
After power on:
Wait approximately five seconds for the
display of the start screen. The QStar UFM automatically
opens the central measuring window “Flow 1”.
Starting in the main menu:
Select “ESC” > “MEAS.”
The “Flow 1” measuring window provides concise infor
-
mation that is important for flow and heat.
DATA IN MAIN MENU “FLOW 1”
PARAMETER DESIGNATION
Displays the current flowrate
Totalizer = flowrate counter. Dis
-
plays the actual flowrate value.
Displays the actual thermal output
Displays the actual heat quantity
Returns the sonic speed of the
fluid