The transmitter can be mounted at the field location in a standard DIN form B head or on a DIN rail inside a local box. Because amplification and conversion of the input signal is performed within a few feet of the sensor, electrical interference in noisy environments is eliminated. Temperature measurement can be done with one of several RTD’s: 100 Ω, 1000 Ω platinum, 100 Ω Nickel and 1000 Ω Nickel. Drawing power directly from the signal line, only 2 wires are needed for power and signal. This industry-standard 4-20mA signal travels thousands of feet over a pair of wires, ignoring electrical interference and bringing the temperature, accurately, into your computer or controller. Description Designed for use in room air applications, model TT115/TT155/TT165 is a 2-wire temperature transmitter for RTD (Resistance Temperature Detector) thermometers.This transmitter amplifies a signal from a RTD or linear resistance, and it turns the signal into a current which increases from 4 to 20 milliamperes as the temperature or input signal increases.The TemptranTM converts the RTD's signal into a 4 to 20 mA DC current. The current changes according to the range in which the Temptran is calibrated: 4 mA at the lowest temperature of the range, rising to 20 mA at the top of the range. Learn more about Minco’s approach to design innovation and consider joining the team. The leads that supply power also carry the current signal. TT409, TT829, TT839 Temptran 4-20 mA Current Transmitter Read More. Output: Calibration Accuracy: Transmitter Linearity: Physical: Operating Environment: Storage Environment: Ambient Temperature Effects: Warm-up Drift: Supply Voltage: Input Voltage Effect: Maximum Load Resistance: Note: Transmitter circuit board only, Room Air housing and RTD sold separately. System Integration: Zero and Span Adjustment: Maximum Output Current: Power Connections: Sensor Connections:ġ00 ohm platinum RTD, 0.00392 ohm/ohm/☌ TCR, 100 ohm platinum RTD, 0.00391 ohm/ohm/☌ TCR, 100 ohm platinum RTD, 0.00385 ohm/ohm/☌ TCR, 1000 ohm platinum RTD, 0.00385 ohm/ohm/☌ TCR 1000 ohm platinum RTD, 0.00375 ohm/ohm/☌ TCR 4 to 20 mA DC over specified range, limited to 30mA maximum. Printed circuit board designed to mount inside the S470 series thermostat housing with RTD 32° to 122☏ (0° to 50☌), non-condensing. ± 0.001% of span per volt from 8.5 to 35 VDC. The maximum allowable resistance of the signal-carrying loop, including extension wires and load resistance, is given by this formula: Rloop max = (Vsupply-8.5)/.02 amps. For example, if the supply voltage is 24 VDC, the loop resistance must be less than 775 Ω. Output “High” (22-28mA) with sensor open. Output “Low” (3.3-3.7mA) with sensor shorted. Screw terminals, non-polar (connect either way). Installation Locate the Temptran near the RTD, in an area where the ambient temperature stays between the temperature range of the output. Connect the Temptran as shown in the wiring diagram below. The transmitter’s power and RTD connections are designed for non-polar hook-up, so polarity is not important. The maximum DC supply should not exceed 35 VDC. For the RTD, good connections are a must, a few ohms of resistance in the connection could cause an error of several degrees. The Temptran has been factory-calibrated to its marked temperature range or to a specific RTD, do not change its Zero or Span adjustments. Power Supply DC power supply requirements are determined by the transmitter’s minimum voltage requirement and voltage drop across the load resistor and installation lead wires. Example: The transmitter requires 8.5 Volts minimum. A typical 250 ohm load resistor drops 5.0 Volts 20 mA. Allowing a margin of 0.5 Volts for the supply permits 25 ohms of lead wire resistance for remote installation. Totaling these, we get a minimum power supply requirement of 14 VDC.
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