Taco 629 DPS629 Differential Pressure Transmitter Installation & Operating Instructions

Below you will find brief information for Differential Pressure Transmitter 629 DPS629. The Series 629 Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. The Series 629 Differential Pressure Transmitter is designed to meet NEMA-4X (IP66) construction. It employs dual pressure sensors converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Small internal volume and minimum moving parts result in exceptional response and reliability. Terminal block, zero and span adjustments are easily accessed under the top cover. The Series 629 Differential Pressure Transmitter is designed to meet NEMA-4X (IP66) construction.

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Differential Pressure Transmitter 629 DPS629 - Installation & Operating Instructions | Manualzz

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Key features

  • NEMA-4X (IP66) Construction
  • 0.5% accuracy
  • Dual pressure sensors
  • 4-20 mA output signal
  • Easy access to adjustments
  • Optional LED display
  • Small internal volume
  • Minimum moving parts

Frequently asked questions

The maximum working pressure for the DPS629 depends on the range. You can find the working pressure limits in the chart on page 1.

The DPS629 is compatible with air, compatible gases, and liquids. It is important to ensure that the fluid is compatible with the wetted materials of the transmitter, which are Types 316, 316L SS.

The DPS629 can be connected to a receiver using a two-wire circuit. The electrical connections are made to the terminal block inside the housing. See Figures C, D, E, F, and G in the manual for detailed wiring diagrams.

The maximum length of wire is a function of the wire size and receiver resistance. You should aim for a wire length that contributes to no more than 10% of the receiver resistance. For extremely long runs (over 1000ft), choose receivers with higher resistance to minimize the size and cost of connecting leads.

Zero and span adjustments can be easily accessed under the top cover of the DPS629. Refer to the manual for detailed instructions on how to perform these adjustments.

The optional 3-way valve is recommended for applications where higher line pressures may be encountered at installation or when it is necessary to remove the transmitter for maintenance without interrupting the process.
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