Dwyer Digihelic® DH系列差壓控制器

DH系列 Digihelic®差壓控制器是將數顯差壓表，差壓開關和差壓變送器組合在一起的三合一產品，將多個功能合為一體，可減少庫存，節約安裝的時間和成本。Digihelic®差壓控制器適用于監控風壓，風速和風量的應用場合，精度為0.5%，量程范圍從0.25到100英寸水柱。

Digihelic®差壓控制器可現場選擇各種壓力，風速和風量等工程單位。兩個單刀雙擲的開關，可調回差，可對應4-20mA進行量程遷移，在風速或風量測量時采用線性的開方輸出。DH系列在電源的使用上靈活性,供電電源可使用120/220VAC,也可使用控制室常用的24VDC電源。

使用菜單按鍵可編程配置各種功能：安全級別選擇；風壓風速風量選擇；工程單位選擇；皮托管K系數選擇；矩形或圓形管選擇；設定點和報警選??；高，低或高/低報警設定；自動或手動復位；報警延時；查看峰谷值；數字阻尼調整；量程遷移；Modbus®通訊和現場校準等。

它將所有功能匯聚到一個產品，能用于所有差壓監控應用場合，這就是為什么DH系列是你的選擇的原因。

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory.

Housing Material: ABS plastic, UL approved 94 V-0.

Accuracy: ±0.5% at 77°F (25°C) including hysteresis and repeatability.

Stability: < ±1% per year.

Pressure Limits: Ranges ≤ 2.5 in w.c. = 2 psi; 5": 5 psi; 10": 5 psi; 25": 5 psi; 50": 5 psi, 100": 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).

Power Requirements: High voltage power = 100 to 240 VAC, 50 to 400 Hz or 132 to 240 VDC. Low voltage power = 24 VDC ±20%.

Power Consumption: Low voltage power = 24 VDC - 130 mA max;
High voltage power = 100 to 240 VAC, 132 to 240 VDC - 7VA max.

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

Zero & Span Adjustments: Accessible via menus.

Response Time: 250 ms.

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

Electrical Connections: Screw terminals.

Process Connections: Compression fitting for use with 1/8" ID X 1/4" OD tubing (3.175 mm ID x 6.35 mm OD). Optional barbed fitting for 3/16" ID tubing.

Enclosure Rating: Face designed to meet NEMA 4X (IP66).

Mounting Orientation: Mount unit in horizontal plane.

Size: 1/8 DIN.

Panel Cutout: 1.772 x 3.620 in (45 x 92 mm).

Weight: 14.4 oz (408 g).

Serial Communications: Modbus® RTU, RS485, 9600 Baud.

Agency Approvals: CE, UL.

SWITCH SPECIFICATIONS

Switch Type: 2 SPDT relays.

Electrical Rating: 8 amps at 240 VAC resistive.

Set Point Adjustment: Adjustable via keypad on face.Dwyer Digihelic® DH系列差壓控制器