FT-112(D) Panel Weighing Indicator, Technical Manual, Rev.1.0.0, May 2019
Page
72
of
170
6.5.3 eCal Electronic Calibration
IMPORTANT NOTE: The eCal electronic calibration is based on the zero adjustment by entering the dead
load value or automatic zero adjustment and span adjustment by entering the load cell data.
WARNING :
If the primary unit is not kg, the selected unit should be saved by exit from set-up and then
perform e-Cal.
1. Full calibration cancels the eCal performed before.
2. Span adjustment is cancels the eCal performed before.
3. Gravity adjustment cannot be done after eCal.
4.
“Span adjustment under load “ cannot be done after eCal.
5. Shift adjustment cancelled the eCal performed before.
This parameter lets you to perform calibration without using any test weights. A/D coefficients of the
indicator are adjusted in production for increasing eCal accuracy. The calibration coefficients are
calculated by scale capacity, total load cell capacity, load cell full scale output and estimated dead
load. If the conditions are convenient for zero calibration, you may perform automatic zero adjustment
instead of entering estimated preload.
[TOTAL LC CAPACIT
] [XXXXXX]
Enter total load cell capacity via numerical keys and press
key to go to the next step.
Example: If the weighing system has 4 pcs 1000 kg load cell, enter 4000.
[AVARAGE LC OUT ]
[XXXXXX]
Enter load cell output in mV/V via numerical keys. If the weighing system has more than one load cell,
calculate the mean value of load cells outputs mV/V indicated on the certificates of the load cells.
Press
key to go to the next step.
Example: If load cell outputs are LC1: 2.0010, LC2: 1.9998, LC3:1.9986 and LC4:2.0002, the mean
value will be;
Mean of LC outputs = ( 2.0010 + 1.9998 + 1.9986 + 2.0002 ) ÷ 4 = 1.9999 mV/V.
[ZERO ADJUST ]
If the scale is empty and you want to make automatic zero adjustment instead of entering estimated
dead load (see next step), press
key and [ UNLOAD THE PAN ] appears. Then press
key to
start zero calibration after unloading the scale. The display will show [ WAIT
] message during zero
adjustment. The scale must be unloaded and stable. Approximately 10 seconds later electronic
calibration will be performed.
If the scale is not empty or you prefer to enter estimated preload value, press the
key before
pressing the
key.
[ESTIM DEAD LOAD]
[XXXXXX]
Enter the dead load value of the weighing system in current unit by using numerical keys.
Press the
key to go to the next step.
Notes
:
Dead load correction: You may change the dead load value after testing the scale and adding the
displayed gross weight value of unloaded scale to the dead load value. Do not press
key after
switch on the instrument after calibration, and the power on zero and automatic zero tracking should
be disabled to determine the dead load error.
Dead load value is cancelled after automatic zero adjustment.
