A&D AD-4408C, Instruction Manual

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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.