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Dwyer Digihelic®DH3 微差压控制器

产品时间:2019-06-20

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Dwyer Digihelic®DH3 微差压控制器
DH3系列 Digihelic®微差压控制器是一款三合一的组合仪表,它将数显表,控制开关和变送器组合成一体。这样组合不仅仅节约了仓储空间,还节省了安装费用和时间。

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Dwyer Digihelic®DH3 微差压控制器

DH3系列 Digihelic®微差压控制器是一款三合一的组合仪表,它将数显表,控制开关和变送器组合成一体。这样组合不仅仅节约了仓储空间,还节省了安装费用和时间。Digihelic®微差压控制器最适用于测量差压,风速或风量的应用场合。量程低至0.25到2.5英寸水柱的范围时精度为1%,量程大于或等于5英寸水柱时的精度为0.5%,还可以有正负组合量程。

Digihelic®微差压控制器可选各种通用的压力,风速,风量工程单位,它带有2个单刀双掷的开关,可调回差,并且还输出可对应量程的4-20mA输出信号。

采用面板上的按键编程配置非常容易:安全设置,工作方式选择(压力,风速或风量),工程单位选择,K系数选择,圆管方管选择,报警设定点设置,手动自动复位选择,报警延迟,峰谷值记录,数字阻尼,4-20mA对应量程等等。

DH3系列

Digihelic®微差压控制器

和Photohelic®尺寸一样的数显微差压控制器,有用于流量测量的开方输出

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory.

Housing Material: Die cast aluminum case and bezel.

Accuracy: ±1.5% for 0.25" and ±0.25" w.c. ranges. Ranges 0.5" to 5" w.c. and corresponding bi-directional (except ±2.5" w.c.) ±1%; All other ranges: ±0.5% @ 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).

Stability: < ±1% per year.

Pressure Limits: Ranges ≤ 2.5 in w.c.: 25 psi; ±2.5", 5 in w.c.: 5 psi; 10 in w.c.: 5 psi; 25 in w.c.: 5 psi; 50 in w.c.: 5 psi; 100 in w.c.: 9 psi.

Temperature Limits: 32 to 140°F (0 to 60°C).

Compensated Temperature Limits: 32 to 140°F (0 to 60°C).

Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C). For 0.25" and ±0.25" w.c. ranges: ±0.03%/°F (±0.054%/°C).

Power Requirements: 12 to 28 VDC, 12 to 28 VAC 50 to 400 Hz.

Power Consumption: 3 VA max.

Output Signal: 4 to 20 mA DC into 900 Ω max.

Zero & Span Adjustments: Accessible via menus.

Response Time: 250 ms (damping set to 1).

Display: Backlit 4 digit LCD 0.4" height LED indicators for set point and alarm status.

Electrical Connections: 15 pin male high density D-sub connection. 18" (46 cm) cable with 10 conductors included.

Process Connections: 1/8" female NPT. Side or back connections.

Mounting Orientation: Mount unit in vertical plane.

Size: 5" (127 mm) OD x 3-1/8" (79.38 mm).

Weight: 1.75 lb (794 g).

Agency Approvals: CE.

 

SWITCH SPECIFICATIONS

Switch Type: 2 SPDT relays.

Electrical Rating: 1 A @ 30 VAC/VDC.

Set Point Adjustment: Adjustable via keypad on face.

Dwyer Digihelic®DH3 微差压控制器

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