PJX balances offer a choice of three calibration methods: Internal Calibration (for InCal models
only), Span calibration and Linearity Calibration.
Attention: Do not disturb the balance during any calibration.
Note: ExCal models only have Span Calibration and Linearity Calibration.
Internal Calibration (not applicable to ExCal models) :
Calibration is accomplished with the internal calibration mass. Internal Calibration can be performed
at any time, provided the balance has warmed up to operating temperature and is level.
With the Balance turned ON and no load on the pan, press the Tare / Menu-Cal button and select
InCal to initiate the internal calibration.
The screen shows the status, and then returns to the current application after calibration.
Automatic Calibration (not applicable to ExCal models) :
Use this calibration method to fine tune the effect of the Internal Calibration.
Calibration Adjust may be used to adjust the result of the Internal Calibration by +100 divisions.
Note: Before making a calibration adjustment, perform an Internal Calibration. To verify whether an
adjustment is needed, place a test mass equal to the span calibration value on the pan and note the
difference (in divisions) between the nominal mass value and the actual balance reading. If the
difference is within +/- division, calibration adjustment is not required. If the difference exceeds +/-1
division, calibration adjustment is recommended.
Example:
Expected weight reading: 200.000g (Test mass value)
Actual weight reading: 200.014g
Difference in grams: – 0.014g
Difference in divisions: – 14 (InCal Adjust value)
To perform a Calibration Adjustment, select InCal Adjustment from the list of Calibration Menu;
enter the value (positive or negative divisions) to match the difference noted earlier in the
procedure.
Recalibrate using Internal Calibration. After calibration, place the test mass on the pan and verify
that the mass value now matches the displayed value. If not, repeat the procedure until Internal
Calibration reading agrees with the test mass.
SPAN CALIBRATION :
Span calibration uses two calibration points, one at zero load and the other at specified full load
(span). For detailed calibration mass information please see the specification tables 4-1.
With the balance turned On and no load on the pan, Span Calibration can be performed. The best
accuracy is achieved using the mass closest to the full span value.
- Steps for span calibration
-
1. Press and hold the Tare / Menu-Cal button, and the
Calibration Menu will display
- 2. Press Yes to enter the Calibration Menu
-
3. To change the calibration mode, press No until SpaN
(span calibration) is displayed
-
4. The Calibration mass value will be shown in the screen.
After the display shows 200.0000 g, place weight(s) of
200 g on the pan for calibration. To change to the
calibration point of half full capacity (e.g. 100 g), press
the Function / Mode button. After the screen shows
"Place weights" and "100.000 g", place weight(s) of 100
g on the pan for calibration.
-
5. Once the span calibration is completed successfully,
CAL.Done will display.
1.1
Press any button to return to the previous
screen
-
6. Remove the weight(s), and the reading will be set to
zero
LINEARITY CALIBRATION :
Linearity calibration uses three calibration points, one at zero load and the others at specified loads.
With no load on the scale, press Linearity Calibration to begin the process.
The balance captures the zero point, and then prompts for the next weight.
Continue to follow the instructions on the display until the calibration is completed
- Steps for linearity calibration
-
1. Long press the Tare / Menu-Cal button, and the
Calibration Menu will display
- 2. Press Yes to enter the Calibration Menu
-
3. To change the calibration mode, press No until LineRr
(linearity calibration) is displayed
-
4. The calibration mass value will be shown in the display.
After the display shows 100.0000 g, place weight(s) of
100 g on the pan for calibration
-
5. Remove the weight(s) of 100 g from the pan. After a
while, 200.0000 g will be displayed on the screen. Place
weight(s) of 200 g on the pan
-
6. Once the linearity calibration is completed successfully,
CAL.done will display.
-
7. Remove the weight(s), and the reading will be set to
zero
