3000SGT系列 Photohelic®三合一差壓變送器/開關/表組合了關鍵的控制功能于一體,便于安裝。它采用了Dwyer多年積攢的可靠耐用的低壓測量技術，能夠測量空氣或其它兼容氣體的正壓，負壓或差壓，精度為2%。差壓表是獨立顯示，面板4英寸，即使掉電，不會影響差壓表的現場指示。
另外，兩個雙刀雙擲的開關可用于高低限位控制，額定值為10 A @ 28 VDC or 120/240 VAC，設定點的回差大約一個指針寬度-小于滿刻度的1%。正好保證方便控制，避免震蕩。自帶的保持線圈可以讓用戶把兩個開關變成一個可以自由調整回差的單個開關，zui適用于潔凈室，建筑物壓力控制，暖通空調系統，空氣過濾器，液位等等控制系統?？刹捎们懊姘迳系男o和紅色的設定點指針，在在量程的滿范圍內調整設定點。
zui后,3000SGT系列 Photohelic®包括有單獨的4-20mA兩線制輸出變送器，采用10-35VDC供電，在后部帶有零點和量程調節功能。可選擇A-700電源板直接連接100-240V交流電，輸出24-28V。此變送器用于在變風量調節系統中來控制風機，或調整風門。將所有的控制和顯示功能合為一體，除了明顯的節約造價，減少安裝空間的好處外，它還將取壓管線由過去的三組或四組減少到一組，大大地節約了安裝材料和安裝時間。
GAGE SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Accuracy: See model chart on catalog page. Pressure Limits: See model chart on catalog page. Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Process Connections: 1/8" female NPT. Size: 4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm). Weight: 3 lb. 14.5 oz (1.77 kg).SWITCH SPECIFICATIONS Switch Type: Each set point has 2 Form C relays (DPDT). Repeatability: ±1% of full scale. Electrical Rating: 10A @ 24 VDC or 120 VAC, 6A @ 240 VAC. Electrical Connections: Screw terminals. Power Requirements: 120 VAC, ±10%. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. Set Point Adjustment: Adjustable knobs on face.TRANSMITTER SPECIFICATIONS Accuracy: See model chart below. Temperature Limits: 20 to 120°F. (-6.67 to 48.9°C). Pressure Limits: See model chart on catalog page. Thermal Effects: ±0.025% F.S./°F (0.045% F.S./°C). Power Requirements: 10.0 to 35 VDC (2-wire). Output Signal: 4-20 mA DC. Zero & Span Adjustments: Multi-turn potentiometers, internally accessible. Response Time: 250 mSec. Loop Resistance: 0 - 1250 ohms. Current Consumption: 38 mA DC, maximum. Electrical Connections: Terminal block. Warm-up Time: 10 minutes. |
