Despatch P1400+ Temperature Controller - Manual (Page 100)

94
Note:
Defaults to °F for USA units. Defaults to °C for no n-USA units.
The Configuration Mode parameters, Scale Range Upper Limit and Scale Range Lower Limit,
can be used to restrict range.
Thermocouple Performance
Calibration: Complies with BS4937, NBS125 and IEC584.
Measurement
Accuracy: ±
0.1% of full range span
±
1LSD.
NOTE: Reduced performance for B Thermocouple from 100 to 600°C.
NOTE: PtRh 20% vs PtRh 40% Thermocouple accuracy is 0.25% and has
reduced performance below 800°C.
Linearisation
Accuracy: Better than
±
0.2
°
C any point, for 0.1° resolution ranges (
±
0.05
°
C typical).
Better than
±
0.5
°
C any point, for 1° resolution ranges.
Cold Junction
Compensation: Better than
±
0.7
°
C under reference conditions.
Better than
±
1
°
C under operating conditions.
Temperature
Stability: 0.01% of span/
°
C change in ambient temperature.
Supply Voltage
Influence: Negligible.
Relative Humidity
Influence: Negligible.
Sensor Resistance
Influence: Thermocouple 100 Ω : <0.1% of span error.
Thermocouple 1000 Ω : <0.5% of span error.
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 is
over-range.
Resistance Temperature Detector (RTD)
RTD Ranges Available
Range Min
in
°°°°
C
Range Max
in
°°°°
C
Range Min
in
°°°°
F
Range Max
in
°°°°
F
Resolution
-128.8 537.7 -199.9 999.9 0.1°
-199 800 -328 1472 1° (default)
Note:
Scale Range Upper Limit and Scale Range Lower Limit Configuration Mode parameters can
be used to restrict range.