Rice Lake PR5230 Fieldbus Transmitter - Manual (Page 109)

PR 5230 Instrument Manual Commissioning
Sartorius EN-109
5.4 Calibration of the Internal Weighing Point
Calibration using weights, mV/V or load cell data can be done using the VNC program. During calibration, the
instrument must be set to gross weight display (reset tare, if necessary).
For a ’legal-for-trade’ application, set the mode under -[Calibration]-[Param] to [W &M] before starting
calibration; see Chapter 5.4.13.1.
Select [New] to go to the maximum capacity [Max] (see Chapter 5.4.3); select the scale interval and determine
the dead load.
Now calibrate the maximum capacity by applying a calibration weight, in mV/V or with load cell data.
After determining the test value, the menu can be closed as described in Chapter 5.4.12, in order to save the
new settings.
Calibration data can be protected by the CAL switch (see Chapter 5.1.1), which must be sealed in the closed
(write-protected) position for ‘legal-for-trade’ applications.
5.4.1 Displaying Calibration Data
When the CAL switch is closed, the following message is displayed, only data
display possible with [Param]:
With [View], the calibration data can be displayed, but not changed.
WP A/ View Calibration
Max 3000 d 3000 kg Number of scale intervals and max. capacity
Scale interval 3000 d 1 kg Scale interval
Deadload at 0.00 kg 0.000000 Dead load in weight and mV/V
Max at 3000.00 kg 1.000000 Weight and mV/V for maximum capacity
Calibrated at 3000.00 kg 1.000000 Test load* and corresponding mV/V
Sensitivity 833.33 4.000000 Number of internal counts and voltage
per scale interval
Param
The calibration data and parameters (press [Param]) are displayed in the format entered/determined during
calibration.
* After input with mV/V, the maximum capacity and the mV/V value entered are displayed.
5.4.1.1 Increased Resolution (10-Fold)
In the -[Calibration] menu, the weight is displayed with 10-fold resolution (also with the CAL switch
closed) when you press the key , and marked as an invalid weight with above the weight unit. The
display on the instrument remains unchanged. After 5 s, the VNC display returns to normal resolution or you
can press the key to return to normal display immediately.