A&D Weighing AD-4406 - Manual (Page 9)

AD-4406 Weighing Indicator Page 7
3.5. Verifying Load Cell Output and Input Sensitivity
The input sensitivity of the indicator is 0.2 µV/division or more. Adapt to the following
inequality, when you design a weighing instrument using the indicator and load cell(s).
Caution A change in input voltage sensitivity is required to cause a one division
change in the display. Select as large an input sensitivity voltage as
possible so that the weighing interval becomes stable.
Consider the leverage if a lever is used.
Weighing instrument
using one load cell.
A
D B E
2 . 0
* *
£
Weighing instrument
using multi-load cell
N A
D B E
2 . 0
*
* *
£
A: Rated capacity of load cell [kg]
B: Rated output [mV/V]
D:Weighing interval [kg]
E: Excitation voltage [mV]
N:Number of load cells
Verification Example
Design:
Load cell
N=1
Rated capacity A=750 [kg]
Rated output B=3 [mV/V]
Excitation voltage E=5000 [mV]
Weighing interval D=0.05 [kg]
Weighing capacity 300 [kg]
2 . 0 1
750
05 . 0 3 5000
³ =
* *
. Therefore,
regard the instrument as a good design.
3.6. Installing an Option Board
Caution Do not remove any screws without the following step.
This is the procedure for the data output board (OP-03, OP-04, OP-05, OP-07 and
OP-08).
Step 1 Remove the power cord and other cables from the indicator.
Step 2 Remove two screws from the rear blank panel.
Step 3 Remove the rear blank panel.
Step 4 Insert the option board into both board guides and insert the board. Then the
connector between the main board and the option board is connected. If the option
board panel will not close completely, retry step 4 to insert the option board correctly.
Step 5 Secure the option board panel using two screws.
3.7. Attaching the Display Stand (OP-11)
Caution Do not remove any screws without the following step.
Step 1 Remove the power cord and other cables from the indicator.
Step 2 Secure the stand to both slide-rails with the bolts provided.
3. Installation and Precautions