A&D AD-4408C Bedienerhandbuch PDF herunterladen (Seite 17)

Page 15 AD-4408C Weighing Indicator

Type Advantages Disadvantages Description

6-wire connection

(recommended)

The error is small

even when the load

cell cable is

extended, a thin load

cell cable is used, or

multiple load cells

are used.

Complicated wiring

Use a 6-wire

shielded cable

when a summing

box is used.

4-wire connection Simple wiring

The influence of

the load cell cable

resistance worsens

the temperature

coefficient.

Prone to the

influence of the

contact resistance

of the connector

The error

increases when

the load cell cable

is extended or

multiple load cells

are used.

Precautions on performing the 4-wire connection

Be sure to connect terminals 1 and 2 (EXC+ and SEN+) and terminals 3 and 4

(SEN- and EXC-).

If the cable needs extending, use a cable with as large a cross-sectional area as

possible or keep the cable as short as possible.

5.5. Checking the Load Cell Connection

When the load cell connection is complete, follow the procedure below to check the

connection.

Step 1 Perform a visual check to ensure that the wiring is correct.

Step 2 Turn the AD-4408C ON.

All the digits may be OFF before calibration. Even under such a condition, the

check mode can be used.

Step 3 Enter the check mode and check the load cell output value.

Refer to “10.2.1. Entering the check mode” to enter the A/D check mode.

Step 4 Confirm that the displayed load cell output value matches the specified value.

Normally the displayed value will be the load cell rated output value or less.

Step 5 If an error occurs, refer to “10.4. Checking the Load Cell Connection Using the

Digital Multimeter” to check the connection.

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