3000SGT系列 Photohelic三合一差壓變送器/開(kāi)關(guān)/表-德威爾Dwyer
3000SGT系列 Photohelic®三合一差壓變送器/開(kāi)關(guān)/表組合了關(guān)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(cè)量技術(shù)，能夠測(cè)量空氣或其它兼容氣體的正壓，負(fù)壓或差壓，精度為2%。差壓表是獨(dú)立顯示，面板4英寸，即使掉電，不會(huì)影響差壓表的現(xiàn)場(chǎng)指示。
另外，兩個(gè)雙刀雙擲的開(kāi)關(guān)可用于高低限位控制，額定值為10 A @ 28 VDC or 120/240 VAC，設(shè)定點(diǎn)的回差大約一個(gè)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(gè)開(kāi)關(guān)變成一個(gè)可以自由調(diào)整回差的單個(gè)開(kāi)關(guān)，*適用于潔凈室，建筑物壓力控制，暖通空調(diào)系統(tǒng)，空氣過(guò)濾器，液位等等控制系統(tǒng)。可采用前面板上的旋鈕和紅色的設(shè)定點(diǎn)指針，在在量程的滿范圍內(nèi)調(diào)整設(shè)定點(diǎn)。
*后,3000SGT系列 Photohelic®包括有單獨(dú)的4-20mA兩線制輸出變送器，采用10-35VDC供電，在后部帶有零點(diǎn)和量程調(diào)節(jié)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*適合用于在變風(fēng)量調(diào)節(jié)系統(tǒng)中來(lái)控制風(fēng)機(jī)，或調(diào)整風(fēng)門。將所有的控制和顯示功能合為一體，除了明顯的節(jié)約造價(jià)，減少安裝空間的好處外，它還將取壓管線由過(guò)去的三組或四組減少到一組，大大地節(jié)約了安裝材料和安裝時(shí)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 on catalog page.
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.
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