YOKOGAWA DL850E - Page 170

6-35
IM DL850E-03EN
Specifications
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2
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6
App
Index
Item Specifications
Precautions • Highly sensitive measurements are made in the µV level in strain measurements.
Therefore, take measures against noise at the strain sensor perimeter, bridge head, and
cable wiring.
• Depending on the noise environment, an error may result in the balance. Check the
influence before making measurements.
• The bridge head specified by YOKOGAWA has high noise resistance.
• When executing shunt calibration, be sure to calculate the shunt resistance in advance,
and execute it in a range so that the measured values do not exceed the range even
when the shunt resistance is ON.
• Some of the strain gauge sensors and bridge heads made by other manufacturers
do not have sensing wires connected. (No such problems with bridge heads made by
YOKOGAWA.) If such products are used, an error may result in the bridge voltage leading
to measurement errors, because sensing does not work effectively. Perform sensing as
close to the bridge head as possible. (There is no conversion cable for sensing on D-Sub
connector types.)
• The connector shell is connected to the case potential.
• When a bridge head (701957 or 701958) is used, the connector shell, cable shield, and
the bridge head case are all connected to the case potential of the DL850E/DL850EV.
• When a bridge head (701957 or 701958) is used, the floating GND is connected to the
bridge head case inside the bridge head.
• Be sure to execute balancing again when you change the range or the bridge voltage.
1 Value measured under standard operating conditions.
2 The typical value is a representative or standard value. It is not strictly warranted.
Module front View
1: Floating common
2: Sense- (positive bridge voltage sensing)
3: Shuntcal- (negative shunt signal)
4: Shuntcal+ (positive shunt signal)
5: Sense+ (positive bridge voltage sensing)
6: Bridge- (negative bridge voltage)
7: Input- (negative measurement signal)
8: Input+ (positive measurement signal)
9: Bridge+ (positive bridge voltage)
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6.13 Module Specifications