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After the last point is entered, PCCU32 will automatically calibrate the RTD.
If electing to use bias as a calibration method, the RTD temperature will always be biased by this
value. The bias does not affect the fixed temperature that is specified on the Setup tab.
Place the flow computer in Hold mode by selecting Calibration on the tool bar.
Select the measurement tube in the navigation tree.
On the Calibration tab, select Tf from the Calibration drop-down menu.
Click in the Bias field to open the Enter RTD Bias window and enter a new value.
IMPORTANT NOTE: To enter a negative value in the Bias field, use a minus sign (-) before
the value.
Click OK.
On the Setup tab, select RTD Installed for the RTD temperature and bias value to be
used.
IMPORTANT NOTE: The current temperature value (Tf) will increase or decrease to reflect
the effect of the bias. The bias value will not affect the Fixed Temperature, which is specified
on the Setup tab.
Click Close to exit Calibration and exit Hold mode.
Click OK.
The calibration for analog input (AI) can be a 3-point or 5-point calibration
Table 11-3: AI calibration points
Type of
Points
calibration
3-point
Low, 50%, and 100%
5-point
Low, 25%, 50%, 75% and 100%
Typical external devices include 4-20 mA or 1-5 V transmitters. Use the values in
calibration points for these types of devices.
Table 11-4: Typical calibration point values
Available calibration
points
Low
25%
50%
75%
100%
IMPORTANT NOTE: To properly calibrate the AI, you must determine the measurement
range and signal type of the external device.
1 3 0 | XSE RIE S G5 | 2 10 60 2 6MNAA
Current (in mA)
for 4-20 mA range
4
8
12
16
20
Voltage (in volts) for 1-5 V range
1
2
3
4
5
(Table
11-3).
Table 11-4
for the
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