AD-4430B
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7.4.
Verifying The Load Cell Connections ( DIAGNOS )
7.4.1.
Guideline To Verify The Load Cell Connections
The faulty wiring or disconnection of the load cell can be checked using the AD-4430B.
This verification is useful for new setting, pre-measurement inspection and periodical inspection.
No.
Check Item
Target
Judgment Criteria (Generally)
1 Load cell input voltage
Between SEN+ SEN- 3 V or more
2 SEN
+
voltage
Between SEN+ AGND 4 V or more
3 SEN
-
voltage
Between SEN-
AGND 1 V or less
4 Load cell output voltage
Between SIG+
SIG- Within
±
35 mV
5 Load cell output rate
Between SIG+
SIG- Within
±
7 mV/V
6 SIG
+
voltage
Between SIG+
AGND 1 V to 4 V
7 SIG
-
voltage
Between SIG-
AGND 1 V to 4 V
8 Internal temperature
-
20 °C to
+
60 °C
AGND
:
Internal analog circuit ground
SIG
-
:
Load cell output (
-
)
SIG
+
:
Load cell output (
+
)
EXC
-
:
Load cell input (
-
)
SEN
-
:
Sensing input (
-
)
SEN
+
:
Sensing input (
+
)
EXC
+
:
Load cell input (
+
)
7.4.2.
The Operation With The BCD Input
When inputting "ON" level to the "DIAGNOS" terminal of the BCD input terminal for 1 second
or more, the self-check mode is started and each results are displayed and outputted. The
scan condition of the self-check mode can be specified by the following BCD input.
BCD Input
No.
DIAGNOS
GRS/NET
HOLD
TARE
ZERO
Scan
ON
OFF
OFF
OFF
OFF
1
ON
OFF
OFF
OFF
ON
2
ON
OFF
OFF
ON
OFF
3
ON
OFF
OFF
ON
ON
4
ON
OFF
ON
OFF
OFF
5
ON
OFF
ON
OFF
ON
6
ON
OFF
ON
ON
OFF
7
ON
OFF
ON
ON
ON
8
ON
ON
OFF
OFF
OFF
Illustration 11 Wire Name of Load Cell
AD-4430B
Load cell
