PT113
Instruction Manual
21
Force Mode
:
Bipolar or unipolar force measurement data in calibrated force unit is
transmitted.
Select scale operation mode and polarity. Click the
Write to Digitizer
button to save your mode
selection. This should be performed before any other parameter settings.
Default calibration of PT113 instruments is Count Mode and 10 mV unipolar input signal range.
If you select the count mode, there is no scale build and instrument calibration. Each PT113 instrument
is adjusted in production to increase the calibration accuracy. The PT113 input signal ranges and their
external resolutions are seen in Table 4 .4. below.
Input signal range
Input Signal level
Polarity
External resolution
0 to 5 mV
5 mV
Unipolar
1.000.000 count
-5 to 5 mV
Bipolar
2.000.000 count
0 to 10 mV
10 mV
Unipolar
1.000.000 count
-10 to 10 mV
Bipolar
2.000.000 count
0 to 15 mV
15 mV
Unipolar
1.000.000 count
-15 to 15 mV
Bipolar
2.000.000 count
0 to 18 mV
18 mV
Unipolar
1.000.000 count
-18 to 18 mV
Bipolar
2.000.000 count
Table 4.4 - Count mode input signal ranges and external resolutions
Select the input signal level and polarity for high external resolution. Write your mode selection to the
instrument by clicking the
Write to Digitizer
button. Jump to 6.4PRE-COMMISSIONING TESTING
6.3.3.2 Scale Build
The scale capacity, increment and unit must be set in the PT113 before performing calibration for
Weighing and Force measurement.
Capacity
:
To select a new value for the scale capacity, click in the text box. Use
the keyboard to enter a new value, or use drop-down menu.
Increment
: Use the drop-down menu to select the increment.
Unit
: Select the unit
6.3.3.3 Scale Calibration
Scale calibration can be performed by using test weights or by electronic calibration.
6.3.3.3.1 Calibration with test weights
This calibration method performs zero and span calibrations using test weights. Test weight value
should not be less than 1/10 of the scale capacity for accurate calibration and for best accuracy is
recommended to be 60% to 90%or more of capacity.
Figure 4.2 - Calibration with test weights
Note: Scale build values should be entered before starting calibration.
Note: The Full Calibration method must be selected to first enter scale build data.
Select
Full Calibration
for performing scale calibration.
•
Click the
Start
button.
•
Unload the scale to perform zero calibration and click the
Yes
button. The virtual display will
show a [WAIT] message during zero calibration. During zero calibration the scale must be
stable.
•
Approximately 5 seconds later, the span calibration window is displayed. Load the scale with
the calibration weight and enter the loaded test weight value, then click the
OK
button. The
