KYOWA MRS-100 Series, Инструкция по эксплуатации

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17
●Conditions for a successful sensor check
Sensor checking uses the tip parallel resistance method, as shown in the following bridge schematic diagram. The
transmitter incorporates a parallel resistance value (Rs) and switch. Turning on the switch increases strain output.
When this increase is within the range indicated in the last line of the following table, the sensor check is
successful.
Description Remarks
Rg bridge resistance
Rg
≒
Rg1
≒
Rg2
≒
Rg3
≒
Rg4
The bridge being used must be entered in
the Setting Software.
Rs Parallel resistance value Rs = 361 kohm (in the transmitter)
k Gage Factor k = 2.00
St
Generating strain value
based on tip parallel
resistance method
SW Switch for sensor check
On when a sensor check is performed
(Switch is in the transmitter)
St0
sensor check
Strain output when off
When sensor check is off
(Strain output for normal measurement)
St1
sensor check
Strain output when on
When sensor check is on
(Switch is on [shorted])
St1–St0
Increased strain output
value
Additional strain output when a sensor
check is performed
Conditions for a successful sensor check: 0.7 × St < St1 − St0 < 1.3 × St
• When Rg = 350 ohm: Based on St = 484.3 × 10
-6
strain,
339.0 × 10
-6
< St1 − St0 < 629.6 × 10
-6
strain
• When Rg = 120 ohm: Based on St = 166.1 × 10
-6
strain,
116.3 × 10
-6
< St1 − St0 < 216.0 × 10
-6
strain
●Analog output from a successful sensor check
• If S
t0
in the preceding MEMO has not been changed
after Balance adjustment, the value will return from
2.5 V to 0 V as shown in the figure at right.
• If S
t0
has been changed after Balance adjustment, the
value will not return from 2.5 V to 0 V as shown in
the figure at right.
NOTE
For five
seconds
Amount
of change
For five
seconds
0 V (after Balance adjustment)
+2.5 V (when the sensor
check is successful)
+2.5 V (when the sensor
check is successful)
0 V (after Balance adjustment)
 
･
≒





 


 
Rs
Rg
Rs k
Rg
Rs Rg
St 1
1
k
Rg
Rg1
Rg4
Rg3
Rg2
D(+IN)
B(-IN)
A(+BV)
C(-BV)
Rs
SW
St0
MEMO