Minebea DSA-631, Инструкция по эксплуатации

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7. Maintenance
7-1. Items to be Checked.
We ship our products after conducting quality control, which covers from design to manufacturing.
It is, however, possible that failures may occur in the products due to natural degradation,
components defects, or wire disconnection.
If a failure occurs, it is necessary to find the cause. In such case, check the following items and
referto page 24. If the cause cannot be found, contact our sales agency. Before returning, be sure to
inform us of problematic points.
●
Check the power supply voltage range.
Power supply voltage range : 85 VAC to 132 VAC / 180 VAC to 264 VAC
12 VDC (10 VDC to 30 VDC)
●
Check input strain range.
Input voltage range : 200
x
10
-6
strain
~
200 000
x
10
-6
strain
●
Check common mode voltage
Withstand voltage between input and output : 1.5 kVAC for one minute.
First check the power supply voltage
- Power Supply Voltage Range
DC Power Supply Voltage : 10 V
~
30 V
AC Power Supply Voltage : 85 V
~
132 V, 50 Hz or 60 Hz
Simptom 1. The bridge is out of balance.
Set the range to OFF using measuring range selection knob(8). (Measuring range
LED (11) comes on at OFF). is brirdge voltage 2V ?
Does the green LED of level meter (2) come on ?
No : Adjustment for internal components of the amplifier unit is needed.
Yes
After adding the dummy resistor to the bridge box, set the measurement range
selection knob (8) to OFF. After that, turn to the direction of 200 to perform bridge
balancing for each range sequentially.
Was the bridge balanced ?
Yes : Make adjustment for a strain gage, transducer, and input cable.
No.
Check the bridge voltage and bridge circuit.
Isn’t A or C terminal connected to the E terminal (common) ?
Yes : Modify the connection
.No : Isn’t the output from the bridge, the B or D terminals, short circulated to
the E terminal (common).
Fig. 7-1 Check I item Chart (1)
WARNING