Yokogawa 415 Steam and Gas User Manual
Page 13
4-20mA Inputs
Inputs:
Flow (2), pressure & temperature.
Input Impedance:
250 ohms.
Measurement Ranges:
Pressure: 0kPa (abs) (0 psia) to 100,000 kPa
(10,000 psia).
Temp:-273°C (-459.4°F) to 1200°C (2192°F).
Accuracy:
0.05%
Circuit:
The 250 ohm resistors are connected to a
common signal ground (current sinking).
Span (Flow):
999,999.
RTD Input (Model 415R)
Temperature
Measurement Range:
-100°C (-148°F) to 200°C (392°F),
Note: a wider temperature range can be
handled via a 4-20mA input.
Accuracy:
0.1°C
RTD Type:
Platinum PT100.
Linearity:
The non-linearity of the RTD is internally
compensated for.
Pressure Input
Type:
Absolute or Gauge.
Span:
The absolute or gauge pressure at both 4mA
and 20mA is programmable.
Atmospheric:
If a gauge pressure sensor is used the
atmospheric pressure can be programmed.
4-20mA Output
Function:
The flowrate selected as the Default display
is output on the 4-20mA output.
Resolution:
10 bits.
Accuracy:
Better than 0.1%.
Maximum Load:
500 ohms internally powered.
950 ohms from 24 VDC.
Isolation:
Output is isolated.
Specification 11