TMT84 Technical data
Endress+Hauser 49
Conversion in: 0.01385/ 0.385 K = 0.04 K (0.054°F)
Example 2:
Input temperature drift = 10K (18°F), thermocouple type K
Measuring range 0 to 600°C (32 to 1112°F)
Maximum process value: 600°C (1112°F)
Measured thermoelectric voltage: 24905 V (s. IEC584)
Typical temperature drift in V: (0.001% of 24905 V) * 10 = 2.5 V
Conversion in K: 2.5 V / 43 V/K = 0.06 K (0.11°F)
Total measurement uncertainty of the measuring point
The measurement uncertainty can be calculated as follows according to GUM (Guide to the Expres-
sion of Uncertainty in Measurement):
Example for calculating the total measurement uncertainty of a thermometer:
Ambient temperature drift = 10K (18°F), Pt100 class A, measuring range 0 to 100°C (32 to
212°F), maximum process temperature: 100°C (212°F), k = 2
• Basis maximum measured error: 0.1 K (0.18°F)
• Maximum measured error through drift in ambient temperature: 0.04 K (0.072°F)
• Maximum measured error of the sensor: 0.15 K (0.27°F)+ 0.002 * 100°C (212°F) = 0.35 K
(0.63°F)
Influence of reference junction
(cold junction)
Pt100 DIN EN 60751 cl. A, accuracy ± 1 K (± 1.8°F), internal reference junction for thermocouples
TC
10.0.5 Environment
Ambient temperature range -40 to +85°C (-40 to +185°F), see Ex documentation (XA, CD) for hazardous area and chapter ’Ap-
provals’
Storage temperature -40 to +100°C (-40 to 212°F)
Altitude Up to 4000m (4374.5 yards) above sea level in accordance with IEC 61010-1, CSA 1010.1-92
Climate class As per IEC 60654-1, class C
Humidity • Condensation permitted as per IEC 60 068-2-33
• Max. rel. humidity: 95% as per IEC 60068-2-30
Degree of protection IP 00, in the installed state, depends on the terminal head or field housing used
Shock and vibration resistance 10 to 2000 Hz at 5g as per IEC 60 068-2-6
To Next Page
Loading...
