PT PT200MI - 6 Calibration; Notes During Span Setting; Setting Steps

PT200MI instruction manual 17
6. CALIBRATION
Note: Zero tracking can not be performed during calibration.
The weighing data can be accepted only when motion is not detected during calibration, the motion
annunciator must be unlit.
When an error occurs, the error message will output from the RS232/RS485 port if fitted.
Note that INPUT1 must be connected to COM to enter the calibration setting mode unless this
setting is altered in the function setting section. The factory setting for INPUT1 is FUNC.
6.1 NOTES DURING SPAN SETTING
1. Span setting when step width and multiplier are not set to 1.
When entering the value of the known calibration load it is necessary to enter this value with the
same increments as set for the PT200MI display of weight. For accurate calibration the known
weight should then be able to be divided by the indicator step without any remainder. This includes
steps of 10, 20 and 50.
2. When the multiplier is set to × 10, no right most digit can be set.
3. When the multiplier, maximum capacity or step width is changed or check sum error occurs, the CAL
mode can not be exited by pressing the MODE key (calibration data must be reset).
4. The PT200MI will not accept a calibration setting with the motion annunciator lit as the weight value is
uncertain. If calibration is required in unstable conditions the motion detection function settings (F3)
and filtering (F11) should be made larger until the motion annunciator is no longer lit. These
function settings can be changed back to another preferred value after calibration without having to
re-calibrate.
5. After span calibration it may be necessary to turn the PT200MI off and then back on again for the indicator
to return to weighing mode.
6.2 SETTING STEPS
6.2.1 CALIBRATION 1 (by using a known weight)
Entering the calibration mode:
• Press and hold the MODE key, then press the TARE key, 2 seconds later, “CAL 1” displays.
• Press the ZERO key, the ZERO annunciator flashes and the zero calibration stage has been
entered.
1. ZERO CALIBRATION
If the current zero setting is acceptable it is not necessary to re-calibrate the zero offset, press the G/N
key to skip the zero calibration procedure, and enter the span calibration stage. Nothing will show on
the display, the G/N or MODE key should be pressed to continue.
If a new zero offset is to be calibrated press the MODE key to accept the current load as the new 0.
2. SPAN CALIBRATION
Once zero calibration is complete the span calibration stage is reached and the GROSS annunciator
flashes throughout the span calibration stage.
After performing zero calibration without error, the indicator will display “ . ” or “00000.0”. The
GROSS annunciator will be flashing.
Press the MODE key to return to the normal weighing condition if only zero adjustment is required.
If a new span calibration is to be set put the known calibration weight on to the weighing platform, use
the ZERO key to move the decimal point to the digit to be set and the TARE key to set the digit so
that the reading of the indicator is the same as the value of the standard weight, press the MODE
key to perform the calibration.
Take care to note the position of the decimal point and the division prior to entering calibration mode
as the value entered during span calibration should be in the same format as that set for display
during function setup. i.e. if the scale has been set to show “100.00” at maximum capacity and the
division is 5 then a known calibration load of 76.05 would be entered as 7605. The decimal point
does not show as it is used to indicate the digit being set.
Note: The minimum calibration load required is 100 times the step width.