DWYER USA Differential Pressure Indicating Transmitter

Differential Pressure Indicating Transmitter

Series 621 Differential Pressure Indicating Transmitter

1/8 DIN Housing, 0.5% Full Scale Accuracy

Series 621 Pressure Indicator is a 1/8 DIN measuring and con trol ling instrument designed for positive, negative or differential pres sures of air and compatible gases. Pres sure readings are dis played on a large 3-1/2 digit LCD dis play while unit simultaneously pro duc es a standard 4-20 mA output signal. Over a dozen stocked rang es are available from 0-3 in. w.c. to 0-100 psid or choose metric units in rang es from 0-0.75 kPa to 0-690 kPa. Circuit design enables use in 2-wire current loops.

Specification:

• Service : Air and non-combustible, compatible gases.
• Thermal Effect : 0.025% F.S./°F (0.045% F.S./°C).
• Zero and Span Adjustments : Accessible potentiometers.
• Electrical Connections : Terminal block.
• Process Connections : Barbed for 1/8" (3.18 mm) I.D. tubing.
• Enclosure Rating : Face designed to meet NEMA 4 (IP66).
• Mounting Orientation : Not position sensitive.

Installation:

• Location: Select a location where the temperature of the unit will be between 20°F and 120°F. Distance from the receiver is limited only by total loop resistance. See Electrical Connections. The tubing feeding pressure to the instrument can be run practically any length required but long lengths will increase response time slightly. Mount the instrument in a location that will not be subject to excessive temperature, shock or vibration. All models are designed for mounting in an enclosed panel.
• Select the mounting position for the instrument on the panel. Prepare the panel by cutting and debarring the required opening. Refer to Figure A.
• From the front panel, slide the instrument through the cutout. The housing gasket should be against the housing flange before installing. From the rear of the panel slide the mounting collar over the housing. Hold the housing with one hand and using the other hand, push the collar evenly against the panel until the springs are com-pressed. The ratchets will hold the mounting collar and housing in place.

Other Details:

ModelRangeMax. Press.

• 621-30-3 in w.c. 5 psig
• 621-60-6 in w.c.        5 psig
• 621-100-10 in w.c.5 psig
• 621-200-20 in w.c.11 psig
• 621-400-40 in w.c.11 psig
• 621-1000-100 in w.c.29 psig
• 621-2000-200 in w.c.29 psig
• 621-1000 0-1000 in w.c.150 psig
• 621P-100-10 psid         58 psig
• 621P-200-20 psid         58 psig
• 621P-300-30 psid         58 psig
• 621P-500-50 psid       150 psig
• 621P-100 0-100 psid150 psig

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