上海茂培供应 Dwyer德威尔 677B-11 677B-12/13/14/15 微差压变送器

SERIES 677B Differential Pressure Transmitters are designed to measure pressures

as low as 0.1 in w.c. with ±0.4% accuracy. Use Series 677B for building energy

management systems, environmental pollution control, oven pressurization, lab and

fume hood control, HVAC and VAV applications. The transmitter features 15 psid

overpressure, reverse polarity protection and EMI/RFI protection. Internal regulation

permits use with unregulated DC power supplies. The NEMA 4 housing allows for

versatile mounting locations and integral mounting tabs simplify installation.

FEATURES/BENEFITS

? NEMA 4 housing enables a range of use outdoor or indoor where water is present

? High accuracy at low pressure ranges provides exceptional measurement for

insuring tight-control and minimizing costly out of specification conditions

? Use with unregulated DC power permits easy access to electrical supply reducing

costly power conditioning and wiring

上海茂培供应 Dwyer德威尔 677B-11 677B-12/13/14/15 微差压变送器

Service: Air and non-conductive, non-corrosive gases.

Wetted Materials: Consult factory.

Accuracy: ±0.5% or ±0.25% FS.

Stability: ±0.5% FS/yr.

Temperature Limits: -20 to 160°F (-29 to 71°C), 10 to 95% RH.

Pressure Limits: 10 psig (0.69 bar).

Compensated Temperature Range: 35 to 135°F (2 to 57°C).

Thermal Effects: ±0.015% F.S./°F (zero and span).

Power Requirements: 12 to 36 VDC.

Output Signal: 4 to 20 mA DC, 2-wire.

Zero and Span Adjustments: Externally accessible potentiometers, non-interactive, ±10% F.S. adjustment.

Response Time: 250 msec max.

Loop Resistance: 0 to 1045 ohms Vmin=12V+[(.22A)(RL)].

Current Consumption: 3.6 mA (min).

Electrical Connections: Screw terminals.

Process Connections: Barbed stainless steel for 3/16" I.D. tubing.

Housing: 300 Series stainless steel (NEMA 2).

Weight: 1.04 lb (472 g).

Agency Approvals: CE.

上海茂培供应 Dwyer德威尔 677B-11 677B-12/13/14/15 微差压变送器

Service: Air and non-conductive, non-corrosive gases.

Wetted Materials: Consult factory.

Accuracy: ±0.5% or ±0.25% FS.

Stability: ±0.5% FS/yr.

Temperature Limits: -20 to 160°F (-29 to 71°C), 10 to 95% RH.

Pressure Limits: 10 psig (0.69 bar).

Compensated Temperature Range: 35 to 135°F (2 to 57°C).

Thermal Effects: ±0.015% F.S./°F (zero and span).

Power Requirements: 12 to 36 VDC.

Output Signal: 4 to 20 mA DC, 2-wire.

Zero and Span Adjustments: Externally accessible potentiometers, non-interactive, ±10% F.S. adjustment.

Response Time: 250 msec max.

Loop Resistance: 0 to 1045 ohms Vmin=12V+[(.22A)(RL)].

Current Consumption: 3.6 mA (min).

Electrical Connections: Screw terminals.

Process Connections: Barbed stainless steel for 3/16" I.D. tubing.

Housing: 300 Series stainless steel (NEMA 2).

Weight: 1.04 lb (472 g).

Agency Approvals: CE.