Despatch P1400+ Temperature Controller User Manual
Page 101

95
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 50
Ω
/lead: <0.5% of span error.
Lead Compensation:
Automatic scheme.
RTD Sensor Current:
150
µ
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.