B3FV
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-7513 Rev.8 P. 4 / 5
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SELECTING DIP SW (coarse adjustment)
INPUT TYPE
Choose Current or Voltage according to Table 2.
INPUT RANGE
Choose the desired range matching the maximum value
and the span according to Table 3.
•
For a current input, convert the range to a voltage with
the following equation:
Table 2
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= ON
INPUT TYPE
SW1
1
Current
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Voltage
Voltage = (100% Current – 0% Current)
×
250 Ω
•
When the 0% and 100% values have the same polarity, select the absolute greater value as Span.
•
When the 0% and 100% values have opposite polarity, select the absolute difference of the two values (100% – 0%) as Span.
•
If the Span value is available in two range selections, select the smaller range. (e.g. Set to the 1 V range for 0 – 1 V, though
the maximum value 1 V can be selectable both in 2 V and 1 V range.)
•
The minimum span and offset requirements in the table must be met when choosing the desired range.
Table 3
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= ON
MAX. VALUE OF
USABLE RANGE
SPAN
OFFSET
SW1
SW2
2
3
4
5
6
7
8
7
8
100 V
20 V ≤ Span ≤ 100 V
-100 to +80%
of the selected range
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20 V
4 V ≤ Span ≤ 20 V
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10 V
2 V ≤ Span ≤ 10 V
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2 V
400 mV ≤ Span ≤ 2 V
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1 V
200 mV ≤ Span ≤ 1 V
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200 mV
40 mV ≤ Span ≤ 200 mV
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100 mV
20 mV ≤ Span ≤ 100 mV
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20 mV
4 mV ≤ Span ≤ 20 mV
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OFFSET
See Table 4.
The offset is defined by the following equation:
Offset =
[0% Input]
× 100 (%)
[Max. value of usable range: Table 3]
Table 4
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= ON
OFFSET
SW2
1
2
3
4
+60% < Offset ≤ +80%
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+30% < Offset ≤ +60%
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+10% < Offset ≤ +30%
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-10% ≤ Offset ≤ +10%
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-30% ≤ Offset < -10%
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-60% ≤ Offset < -30%
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-100% ≤ Offset < -60%
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GAIN
See Table 5.
The gain is defined by the following equation:
Gain =
[Max. value of usable range: Table 3]
× 100 (%)
[100% Input – 0% Input]
Table 5
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= ON
GAIN
SW2
5
6
270% < Gain ≤ 500%
150% < Gain ≤ 270%
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100% ≤ Gain ≤ 150%
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EXAMPLE
Calibrated input range: 1 – 5 V DC
1) Input type: According to Table 2, choose ‘Voltage.’
➠
Set SW1-1 to OFF.
2) Input range:
5 V > 1 V
➠
5 V is used as the maximum value.
According to Table 3, choose ‘10 V.’
➠
Set SW1-4 to ON.
3) Offset
1 V
×
100 = 10 (%)
10 V
➠
According to Table 4, SW2-2 and SW2-3 to ON.
4) Gain
10 V
×
100 = 250 (%)
5 V – 1 V
➠
According to Table 5, set SW2-6 to ON.
ON
1
SW2
2 3 4 5 6 7 8
ON
1
SW1
2 3 4 5 6 7 8
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ZERO & SPAN ADJUSTMENTS (fine adjustments)
Referring to ‘ADJUSTMENT PROCEDURE,’ apply 0% and
100% input signals and adjust the Zero to have 4 mA output
and Span to have 20 mA output respectively.
