EMC INDUSTRIAL GROUP LTD Inputs
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8. Press EDIT and enter the value of the test weight followed by the ENTER key and wait while
the display shows ‘Calibrating, please wait…’.
If possible, remove and apply the test weights several times checking the weight reading
each time. Make sure the weight reading is within acceptable error limits. If not there may be
a mechanical fault which should be fixed before proceeding with the calibration. Repeat the
calibration process if necessary. (To return to the ‘AI1 zero’ step, press the UP key).
9. Press and hold the BACK key to return to normal operation.
Direct loadcell calibration
Q22331 loadcell capacity (sum of the capacity of all loadcells)
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8122 100.0 kg,t,g
Set to be equal to the total capacity of all the loadcells in the weighing system. If there are two 50 kg
loadcells, this setting should be 100 kg.
This setting can be adjusted even if the transmitter has been calibrated with test weights, and it will not
alter the calibration. If set correctly, the ‘system sensitivity’ and ‘deadload’ settings will then show how
the instrument has been calibrated.
Q22332 system sensitivity (average sensitivity of all loadcells) 8124 2.00000 mV/V
Shows the loadcell sensitivity (if the ‘loadcell capacity’ has been set correctly first).
If calibrating without test weights, set this value to the loadcell sensitivity. If there is more than one
loadcell and if each loadcell has a slightly different sensitivity, use the average value. For example, if
there are two loadcells with sensitivities 2.003 and 2.007 mV/V, set the ‘system sensitivity’ to 2.005
mV/V.
Q22333 deadload (dead weight on loadcells) 8126 0.0 kg,t,g
Shows the approximate dead weight on the loadcell(s), provided the ‘loadcell capacity’ has been set
correctly first.
If calibrating without test weights, then set this value to the weighing system’s weight when there is no
material load.
Calibrate Using Loadcell Specifications
The loadcell can be calibrated using the loadcell(s) capacity and sensitivity supplied by the manufac-
turer. Using this method avoids the need to load and unload test weights onto the weighing system. If
the system has already been calibrated using test weights, the actual dead load and loadcell sensitivity
are displayed. These settings should not then be adjusted.
1. Press the Q key to access the setup menu.
2. Key in the quick key code 22331 to select the ‘loadcell capacity’ step.
3. Press the EDIT key. (If editing is locked, key in the password 111 and press ENTER).
4. Key in the total loadcell capacity followed by ENTER. This is normally the sum of all of the
loadcell capacities (e.g. 4 x 100kg loadcells = 400kg total capacity).
5. Press BACK then 2 (or press the DOWN key) to move to the ‘system sensitivity’ step
(QK 22332).
6. Key in the loadcell sensitivity followed by ENTER. This is normally the average of all of the
loadcell sensitivities.
7. Press BACK then 3 (or press the DOWN key) to move to the ‘deadload’ step (QK 22333).
8. If you know or can estimate the deadload, key this in followed by ENTER. This value is the
total weight of the mechanical components applied to the loadcell but excluding any material
weight.
9. Press and hold the BACK key to return to normal operation.
If the deadload is unknown (as is usually the case), a loadcell zero should be performed.
1. Press the Q key to access the setup menu.
2. Key in the quick key code 22321 to select the ‘AI1 zero’ step.
3. Make sure all material and test weights are removed from the weighing system.
4. Press the EDIT key. (If editing is locked, key in the password 111 and press ENTER).
5. Press the 0 key followed by ENTER to initiate a zero calibration.
6. Press and hold the BACK key to return to normal operation.
Loadcell signals
These settings are used for diagnostics and fault detection on the loadcell input.
Q22351 AI1 signal 8700 mV/V
Displays the loadcell signal in mV/V.
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WARNING: Altering loadcell capacity will NOT change the loadcell calibration, but will re-scale the system sensitivity and deadload
values. Altering the system sensitivity or deadload values WILL change the loadcell calibration
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