4.5
Calibration
This sections contains more information on how to calibrate the Newton weighing
system.
4.5.1
Requirements
Calibration requires the following equipment:
Calibration weights
Multimeter
4.5.2
Procedure
Complete the steps below to calibrate the Newton weighing system:
Check the wiring.
Connect the control cabinet to the 230-V power supply.
Set Jumper J1 (on the ST30 board) to 1.
Set DIP-switch 1 (on the ST30 board) to ON.
Set DIP-switches 2 and 3 to OFF.
Set the range of the multimeter to mA.
Connect the multimeter to the ST30 circuit board as follows:
Multimeter
ST30
-
Terminal 7
+
Terminal 8
Is the gutter unloaded (empty) and hanging freely? Use the zero potentiometer
to set the output signal of the multimeter to 0.0 mA.
Place the calibration weight.
Use the gain potentiometer to set the output signal of the multimeter to the
corresponding value (see table below and on the next page).
Newton 100-S
Calibration weight
Formula
Output signal
40 kg
(40/100) * 20 mA
8 mA
45 kg
(45/100) * 20 mA
9 mA
50 kg
(50/100) * 20 mA
10 mA
55 kg
(55/100) * 20 mA
11 mA
60 kg
(60/100) * 20 mA
12 mA
65 kg
(65/100) * 20 mA
13 mA
70 kg
(70/100) * 20 mA
14 mA
75 kg
(75/100) * 20 mA
15 mA
Newton weighing system
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