Rosemount 644 Temperature Transmitter
Rosemount 644 Temperature TransmitterFeature :1. Attach the thermowell to the pipe or process container wall. Install and tighten thermowells before applying process pressure.2. Attach necessary extension nipples and adapters to the thermowell.Seal the nipple and adapter threads with silicone tape.3. Screw the sensor into the thermowell. Install drain seals if required for severe environments or to satisfy code requirements.4. Pull the sensor wiring leads through the universal head and transmitter. Mount the transmitter in the universal head by threading the transmitter mounting screws into the universal head mounting holes.5. Mount the transmitter-sensor assembly into the thermowell. Seal adapter threads with silicone tape.6. Install a cable gland or conduit for field wiring to the conduit entry ofthe universal head. Seal threads with silicone tape.7. Pull the field wiring leads through the conduit into the universal head.Attach the sensor and power leads to the transmitter. Avoid contactwith other terminals.8. Install and tighten the universal head cover. Enclosure covers mustbe fully engaged to meet explosion-proof requirements. Specifications : LCD Display Installation The LCD display provides local indication of the transmitter output andabbreviated diagnostic messages governing transmitter operation.Transmitters ordered with the LCD display are shipped with the meterinstalled. After-market installation requires the meter kit (part number,Website:, which includes:• LCD display assembly (includes LCD display, meter spacer,and 2 screws)• Meter cover with O-ring in placeThe transmitters will accept inputs from a variety of RTD and thermocouple types. Refer to Figure 4-1 when making sensor connections. Refer to Figure 4-2 for Profibus installations.Use the following steps to wire the power and sensor to the transmitter:1. Connect the positive power lead to the .+. terminal. Connect the negative power lead to the .-. terminal.2. Tighten the terminal screws. When tightening the sensor and power wires, the max torque is 6-in.-lbs (0.7 N-m).3. Apply power. Teachnical parameters : Products show : Why chose us :
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