Burkert Type 8630 - Manual (Page 86)

84 - 8630
O
PERATION AND CONTROLLER FUNCTIONS
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CAL P1, CAL P2, CAL TEMP
Calibrating the transmitter inputs at the flow rate controller (4 ... 20 mA)
Apply 4 mA to the input to be calibrated (p1/p2/temperature) and confirm the value by pressing the MANU-
AL/AUTOMATIC key.
Apply 20 mA to the input to be calibrated (p1/p2/temperature) and confirm the value by pressing the
MANUAL/AUTOMATIC key.
At the inputs p1/p2, 4 mA corresponds to a pressure of 0.0 bar (rel).
20 mA corresponds to a pressure of 10.0 bar (rel) or the end value set under CAL PLIM.
At the temperature input, 4 mA correspond to a temperature of 0°C.
20 mA correspond to a temperature of 150°C or the end value set under CAL TLIM.
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CAL PLIM, CAL TLIM
Setting up the sensor measurement range
First, enter the lower pressure/temperature value that corresponds to the 4 mA transmitter signal. Then
enter the upper pressure/temperature value that corresponds to the 20 mA transmitter signal.
PMIN must be within the range -1.01 ... 15.0 bar (rel), PMAX in the range 0.0 ... 16.0 bar (rel).
TMIN and TMAX must be within the 0 ... 150 °C range.
CAL P1P2
Balancing the pressure transmitters
The pressure transmitters p1 and p2 can be balanced in order to increase the measurement accuracy at
small pressure differences. To do this, the feed line behind process valve must be closed, and a constant
pressure must be applied to the controller unit.
With a pressure < 10 % of the sensor measurement range, the zero-point can be balanced,
with a pressure > 55 % of the sensor measurement range, the upper calibration value.
Change the display between p1 and p2 using the arrow keys.
If you press the MANUAL/AUTOMATIC key, the displayed value will be confirmed and the other value will
be matched to ist.
The process will be cancelled with the message P1P2 ERR if the pressure lies between 10 %
and 55 % of the des sensor measurement range or if the difference between p1 and p2 > 1.5 %.
CAL FACT
Reset the settings under CAL.USER to the factory settings
Hold down the MANUAL/AUTOMATIC key until the countdown has expired.