West Control Solutions 8700+ - Manual (Page 167)

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Page 162
Specifications 59305, Issue 7 – March 2014
RTD Performance
Type: Three-wire Pt100.
Calibration: Complies with BS1904 and DIN43760 (0.00385 Ω/Ω/°C).
Measurement
Accuracy: 
0.1% of span

1LSD.
Linearisation
Accuracy: Better than

0.2°C any point, any 0.1°C range (

0.05°C typical). Better
than

0.5°C any point, any 1

C range.

Temperature
Stability: 0.01% of span/°C change in ambient temperature.
Supply Voltage
Influence: Negligible.
Relative Humidity
Influence: Negligible.
Sensor Resistance
Influence: Pt100 50Ω/lead: <0.5% of span error.
Lead Compensation: Automatic scheme.
RTD Sensor Current:
150

A (approximately).
Sensor Break
Protection: Break detected within two seconds. Process Control outputs turn OFF
(0% power); Valve Control “Close” outputs turn on; Limit outputs turn off
(goes into Exceed condition); Alarms operate as if the process variable
has gone over-range.
DC Linear
DC Linear Ranges Available
0 to 20mA 0 to 50mV 0 to 5V
4 to 20mA (default) 10 to 50mV 1 to 5V
0 to 10V
2 to 10V
DC Linear Performance
Scale Range Upper Limit: –1999 to 9999. Decimal point as required.
Scale Range Lower Limit: –1999 to 9999. Decimal point as for Scale Range Upper Limit.
Minimum Span: 1 display LSD.
Measurement Accuracy: 
0.1% of span

1LSD.
Temperature stability: 0.01% of span/°C change in ambient temperature.
Supply Voltage Influence: Negligible.
Relative Humidity
Influence: Negligible.
Input Protection: Up to 10 times maximum span of selected input connection.
Sensor Break Protection: Applicable for 4 to 20mA, 1 to 5V and 2 to 10V ranges only.
Process Control outputs turn OFF (0% power); Valve Control
“Close” outputs turn on; Limit outputs turn off (goes into Exceed
condition); Alarms operate as if process variable is under-range.