PT610, PT620, PT630
Instruction Manual
78
6.5.2.2 [522 RANGE] – Single/Multi range
+
SING = Single Range
2MR = 2 x Multi Range
3MR = 3 x Multi Range
2MI = 2 x Multi Interval
3MI = 3 x Multi Interval
6.5.2.3 [523 MAX] – Capacity/Division
MAX1/d1= single range
MAX2/d2 and MAX3/d3 = multi-range/interval
Enter scale capacity, press
<ENTER>
and enter or select division.
Values for MAX2/d2 and MAX3/d3 will show depending on selection above
6.5.2.4 [524 OVER] – Over range
NO = Over indication after Max
1d = 1 division more than Max
+
9d = 9 divisions more than Max
2% = 2% more than Max
5% = 5% more than Max
When the weight is more than the above amount the scale will stop showing the weight and show over
range.
6.6 [6--] – CALIBRATE/ADJUST
The calibration of the scale is performed here.
Note:
Occasionally an error may occur during calibration and the settings to this point will be lost. To
avoid losing the previous parameter settings press the
<BACK>
key until the prompt shows
[SAVE]
and press the
<ENTER>
key. Re-enter the parameter settings to continue with calibration.
6.6.1 [61_] – Calibration
These parameters require the settings DIP switch to be ON. The scale is calibrated to show the correct
weight. Calibration can be performed with a known calibration load, linearisation can be performed by
calibrating with more than one weight through the range or calibration can be performed electronically.
Note:
Electronic calibration can be very convenient when calibration with a test weight is not practical
but the accuracy is not as good as using a calibration weight. Electronic calibration is also not suitable if
the load cell signal is altered by a summing or cornering box.
6.6.1.1 [611 TEST WEIGHT] – With weight
Calibration with weight involves emptying the scale then placing a known calibration weight on an
empty scale and allowing the indicator to capture values for zero and span. Here calibration weight
could mean a force or pressure of known value. The scale reading must be stable for zero or span
calibration to succeed. If there is vibration or noise, adjust the filter or motion detection to obtain a
stable reading and adjust back to previous values after calibration.
1. Press the
<ENTER>
key at the
[611 TEST WEIGHT]
prompt to start the calibration.
2. At the
[UNLOAD THE PAN]
prompt, remove any weight on the platform or scale, then press the
<ENTER>
key.
3. The indicator automatically starts to capture zero and the
[WAIT]
message is displayed indicating
the operation is in progress.
4. After the
[LOAD THE SCALE]
prompt, the test weight value that will be used for the calibration is
seen on the display as
[XXXXXX]
. If the value of the test weights that will be used is different from the
value shown on the display, enter the new value via the keys. A minimum of 20% of scale capacity is
necessary for calibration; PT recommends 50 to 100%. A calibration error is produced if insufficient
weight is used.
5. Place the test weights or another convenient weight of known value on the scale.
6. Press the
<ENTER>
key to start span calibration. The
[WAIT]
message will be shown on the
display for approximately 10 seconds while span calibration is being performed.
Note:
A minimum of 20% of scale capacity is necessary for calibration.
Note:
The accuracy of the calibration cannot be any greater than the accuracy of the calibration weight.
6.6.1.2 [612 LINEARIZATIO] – Linearisation
There may be some non linearity due to the load cell or mechanical scale hardware which could affect
the scale performance. Three step scale calibration in this parameter improves scale performance.
1. Press the
<ENTER>
key at the
[612 LINEARIZATIO]
prompt to start the calibration.
2. At the
[UNLOAD THE PAN]
prompt, remove any weight on the platform or scale, then press the
<ENTER>
key.
3. The indicator automatically starts to capture zero and the
[WAIT]
message indicating the operation
is in progress is displayed.
4. At the
[LOAD 1]
prompt, the test weight value that will be used for the first step of calibration is
seen on the display as
[XXXXXX]
. If the value of the test weights that will be used is different from the