AS4LC
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-1601 Rev.7 P. 4 / 6
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SENSOR ADJUSTMENTS USING AN ACTUAL LOAD
1) Program Mode
Set ITEM 01 – DATA 2 to turn the unit into Program
Mode.
2) Excitation Voltage
Choose ITEM 05. Press DATA UP or DOWN key until
the Data display shows the desired excitation voltage.
When the value calculated by [Excitation / Resistance]
exceeds 30 mA, set a voltage value to fit with 30 mA limit.
[Example] Max. excitation voltage
10 V
Strain gauge resistance 120 Ω
If you choose 10 V as the excitation:
10 V / 120 Ω = 83.3 mA --> out of allowable range
Then you will choose 3.6 V or less as calculated by the
equation: 30 mA × 120 Ω = 3.6 V
3) 0% Input Voltage
Choose ITEM 07. With no load applied to the sensor,
press DATA DOWN key until the display value is stabi-
lized (while the computation circuit of the unit conducts
averaging process).
DATA display shows the approximate offset voltage.
Display Value = Sensor Voltage × Internal Coefficient*
4) 100% Input Voltage
Choose ITEM 08. With an actual known load, press
DATA DOWN key until the display value is stabilized
(while the computation circuit of the unit conducts aver-
aging process).
DATA display shows the sensor’s sensitivity span.
5) Monitor Mode
Set ITEM 01 – DATA 1 to turn the unit into Monitor
Mode.
6) PV Indication
Press ITEM UP or DOWN key until ITEM display indi-
cates “P”.
If necessary, go to Display Range Scaling, Moving Average,
and other adjustments.
Set the unit to Monitor Mode with ITEM P displayed other
than for programming.
* If 100% load is not available, use the load ratio setting.
With 10% load, set ITEM 09 – DATA 10.0 before adjustments.
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SENSOR ADJUSTMENTS BY ENTERING VALUES
1) Turn the unit into Program Mode.
2) Excitation Voltage
Choose ITEM 05. Press DATA UP or DOWN key until
the DATA display shows the desired excitation voltage.
When the value calculated by [Excitation / Resistance]
exceeds 30 mA, set a voltage value to fit with 30 mA limit.
[Example] Max. excitation voltage
10 V
Strain gauge resistance 120 Ω
If you choose 10 V as the excitation:
10 V / 120 Ω = 83.3 mA --> out of allowable range
Then you will choose 3.6 V or less as calculated by the
equation below:
30 mA × 120 Ω = 3.6 V
3) 0% Input Voltage
Choose ITEM 07. With no load applied to the sensor,
press DATA DOWN key until the display value is stabi-
lized (while the computation circuit of the unit conducts
averaging process).
DATA display shows the approximate offset voltage.
Display Value = Sensor Voltage ≈ Internal Coefficient
4) Sensor’s Sensitivity
Choose ITEM 06. Press DATA UP or DOWN key until
the display shows desired value as specified in the sen-
sor’s specification sheet.
5) Turn the unit into Monitor Mode.
6) Set to ITEM P.
If necessary, go to Display Range Scaling, Moving Average,
and other adjustments.
Set the unit to Monitor Mode with ITEM P displayed other
than for programming.
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DISPLAY RANGE SCALING
[Example]
PV display range 0.0 to 100.0 modified to show -100 to 100
1) Turn the unit into Program Mode.
2) Decimal Point Position
Choose ITEM 16 – DATA 0.
3) 0% Scaling Value
Choose ITEM 14 – DATA -100.
(Negative [–] range is identified with the PL1 turned on.)
4) 100% Scaling Value
Choose ITEM 15 – DATA 100.
5) Turn the unit into Monitor Mode.
6) Set to ITEM P.
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TARE ADJUSTMENT
1) Turn the unit into Program Mode.
2) Contact Input Function
Choose ITEM 18 – DATA 0.
3) Turn the unit into Monitor Mode.
(ITEM 18 is set to DATA 0 as default. No need of con-
ducting 1 through 3.)
4) Set to ITEM P.
5) Close across the contact input terminals (Di).
By the above mentioned procedure, the tare value is stored
in ITEM 10, the PV display shows the value set by 0% Scal-
ing Value, and the transmitter outputs the value set by 0%
Output.
The above mentioned procedure is applicable to modifica-
tions from default setting.
