Dwyer 數字差壓表DM-1208
可以現(xiàn)場編程選擇測量壓力、風速或流量
DM-1000系列數字差壓表/風速表是替換模擬機械式差壓表及風速表的的數字式儀表。同模擬表相比，數字表具有更強大靈活的功能，諸如可以現(xiàn)場編程選擇測量壓力、風速或流量。此外DM-1000系列數字式差壓表還具備一個特性，因其具有報警設定點，特別適用于有過濾器的應用場合，當過濾器臟了后，DM-1000將會閃爍報警，提醒客戶需要進行維護等操作。
對DM-1000系列進行編程，僅僅需要通過菜單鍵進入4個醒目的子菜單，通過它們可以設定安全等級、選擇工程單位、更改K系數（當使用不同的皮托管或流量傳感器時）、設定圓形或方形管道尺寸（測量體積流量時）、更改過濾器設定點、查看/峰值數據、設定數字阻尼值用來平滑讀數（用于讀數波動較多的過程應用）、高級顯示模式（用以節(jié)省電池），現(xiàn)場校準零點及量程。
DM-1000系列數字式差壓表/風速表，具有1%FS的精度（量程大于2 W.C）及2%精度（量程0.25?W.C到1W.C）。DM-1000具有多種供電方式，可以使用9-24VDC電源模塊供電，也可以使用9V電池供電。而當使用電源模塊供電且儀表具有9V電池時，電池將起到備份的作用，即當停電時9V電池將自動啟動，使儀表繼續(xù)正常運行。
型號
DM-1102 range 0-0.25" w.c.
DM-1103 range 0-0.5" w.c.
DM-1104 range 0-1" w.c.
DM-1105 range 0-2" w.c.
DM-1107 range 0-5" w.c.
DM-1108 range 0-10" w.c.
DM-1109 range 0-15" w.c.
DM-1110 range 0-25" w.c.
DM-1111 range 0-50" w.c.
DM-1112 range 0-100" w.c.
DM-1122 range 0.25-0-0.25" w.c.
DM-1123 range 0.5-0-0.5" w.c.
DM-1124 range 1-0-1" w.c.
DM-1125 range 2-0-2" w.c.
DM-1127 range 5-0-5" w.c.
DM-1128 range 10-0-10" w.c.
Service:Air and non-combustible, compatible gases. Wetted Materials:Consult factory. Housing Materials:Glass filled plastic. Accuracy:±1% FS including linearity, hysteresis and repeatability; ±2% FS for ranges 1" w.c. and below. Temperature Limits:0 to 140°F (-18 to 60°C). Compensated Temperature Limits:32 to 122°F (0 to 50°C). Long Term Stability:±1% FS per year. Thermal Effect:±0.05% FS/°F typ.; ±0.10% FS/°F typ. for ranges 1" w.c. and below. Display:4-digit LCD (Digits: 0.60"H x 0.33"W). Display Update:Selectable for 1 second, 10 minutes or update only from button push. Pressure Limits:Normal and bi-directional ranges 5 in w.c. and lower = 2 psi (13.7 kPa); Normal and bi-directional ranges 10 in w.c. and higher = 11 psi (75 kPa). Selectable Engineering Units:in w.c., psi, kPa, Pa, mm w.c., mBar, in Hg, mm Hg, FS (0-99% FS). Power Requirements:9V battery, included, user replaceable or external power supply 9-24 VDC. Battery Service Life:Battery life depending on the Display Update setting: 150 hours (typical) if Display Update = 1 second; 9 months (typical) if Display Update = 10 minutes; 1.5 years (typical) if Display Update is disabled. Battery may last up to four times longer when using lithium-based battery ULTRALIFE U9VL-J. Current Consumption:5 mA maximum. Electrical Connections:Removable terminal block for 16 to 26 AWG. Electrical Entry:Cable glａnd for 0.114 to 0.250" (2.9 to 6.4 mm) diameter cable. Process Connections:1/8" (3 mm) ID tubing. Enclosure Rating:NEMA 4X (IP66). Weight:1.18 lb (535 g). Size:5" (127 mm) OD front face. Agency Approvals:CE.
