24 TTH300 HEAD-MOUNT TEMPERATURE TRANSMITTER | OI/TTH300-EN REV. E
… 8 Electrical connections
Electrical data for inputs and outputs
Input - resistance thermometer / resistances
Resistance thermometer
• Pt100 in accordance with IEC 60751, JIS C1604, MIL-T-24388
• Ni in accordance with DIN 43760
• Cu in accordance with recommendation OIML R 84
Resistance measurement
• 0 to 500 Ω
• 0 to 5000 Ω
Sensor connection type
Two-, three-, four-wire circuit
Connection lead
• Maximum sensor line resistance
per line 50 Ω in accordance with NE 89
• Three-wire circuit:
Symmetrical sensor line resistances
• Two-wire circuit:
Compensation up to 100 Ω total lead resistance
Measurement current
< 300 μA
Sensor short circuit
< 5 Ω (for resistance thermometer)
Sensor wire break
• Measuring range: 0 to 500 Ω > 0.6 to 10 kΩ
• Measuring range: 0 to 5 Ω > 5.3 to 10 kΩ
Corrosion detection in accordance with NE 89
• Three-wire resistance measurement > 50 Ω
• Four-wire resistance measurement > 50 Ω
Sensor error signaling
• Resistance thermometer:
Sensor short circuit and sensor wire break
• Linear resistance measurement:
Sensor wire break
Input - thermocouples / voltages
Types
• B, E, J, K, N, R, S, T in accordance with IEC 60584
• U, L in accordance with DIN 43710
• C, D in accordance with ASTM E-988
Voltages
• −125 to 125 mV
• −125 to 1100 mV
Connection lead
• Maximum sensor line resistance:
per line 1.5 kΩ, total 3 kΩ
Sensor wire break monitoring in accordance with NE 89
• Pulsed with 1 µA outside measurement interval
• Thermocouple measurement 5.3 to 10 kΩ
• Voltage measurement 5.3 to 10 kΩ
Input resistance
> 10 MΩ
Internal reference junction Pt1000, IEC 60751 Cl. B
(no additional jumpers necessary)
Sensor error signaling
• Thermocouple:
Sensor wire break
• Linear voltage measurement:
Sensor wire break
Functionality input
Freestyle characteristic / 32-points-sampling point table
• Resistance measurement up to a maximum of 5 kΩ
• Voltages up to maximum 1.1 V
Sensor error adjustment
• Through Callendar-Van Dusen coefficients
• Through value table, 32 support points
• Through single-point adjustment (offset adjustment)
• Through two-point adjustment
Input functionality
• 1 Sensor
• 2 Sensors:
mean measurement,
differential measurement,
sensor redundancy,
Sensor drift monitoring
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