Ad Weighing Indicator AD-4329 Manual de usuario descargar pdf (Pagina 8)

3.1.3. Adjustment of the Load Ceil Output

Caution a Use a inetaf film resistor in the range of 50kQ to 500kQ with a good

temperature coefficient when adding a resistor to adjust a load cell

output. Use as a large resistance value as possible in the range in which

zero adjustment is possible. Solder this resistor at a point near the load

cell or the indicator.

In Case of Reducing the Output Voltage

When the zero output is too large, add a resistor

between EXC+and SIG-.

in Case of Adding an Offset Voltage to the Output

When the zero output is too small, add a resistor

between EXC+ and S1G+.

3.1.4. Verifying Load Ceil Output and Input Sensitivity

The input sensitivity of the indicator is 0.2pV/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 equivalent to a one division

change of the display. Select as large an Input voltage sensitivity voltage

as possible so that the weighing interval becomes stable,

a Consider the leverage If a lever is used.

Weighing instrument

using one load ceil.

E^tB^D

0.2 £

------------

, Weighing Instrument

using multi-load cell

E^Bh^D

0.2^——~

A^N

A: Rated capacity of load cell [kg]

B: Rated output [mVA/]

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]

6000*3*0.05 , ^

„ -j ^ 0.2. Therefore,

Rated output

8=3 [mVA/I

750

Excitation voltage

E=5000 [mV] regard the instrument as a good design.

Weighing interval

D=0.05 [kg]

Weighing capacity

300 [kg]

3. Insteilatìon and Precaution

Page 6

AD-4329 Weighing Indicator

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 55 56

Comentarios a estos manuales

Sin comentarios

Ad Weighing Indicator AD-4329 Manual de usuario Pagina 8

Comentarios a estos manuales