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Chromalox 8040 User Manual

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100
Thermocouple Ranges Available
Sensor
Type
Range Min
in °C
Range Max
in °C
Range Min
in °F
Range Max
in °F
Resolution
J (default) -200 1200 -328 2192
J -128.8 537.7 -199.9 999.9 0.1°
T -240 400 -400 752
T -128.8 400.0 -199.9 752.0 0.1°
K -240 1373 -400 2503
K -128.8 537.7 -199.9 999.9 0.1°
E -100 1000 -148 1832
E -100.0 999.9 -148.0 999.9 0.1°
N 0 1399 32 2551
B 100 1824 211 3315
R 0 1759 32 3198
S 0 1762 32 3204
C 0 2320 32 4208
PtRh20%:
PtRh40%
0 1850 32 3362
Note: Defaults to °F for USA units. Defaults to °C for non-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.
Linearization 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 100Ω: <0.1% of span error. Thermocouple 1000Ω: <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

Table of Contents

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Chromalox 8040 Specifications

General IconGeneral
DisplayLED
Output VoltageSame as input voltage
Maximum CurrentDepends on configuration
PhaseSingle or Three Phase
DimensionsDepends on model
WeightDepends on model

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