Dwyer 数字差压表DM-1208
可以现场编程选择测量压力、风速或流量
DM-1000系列数字差压表/风速表是替换模拟机械式差压表及风速表的的数字式仪表。同模拟表相比，数字表具有更强大灵活的功能，诸如可以现场编程选择测量压力、风速或流量。此外DM-1000系列数字式差压表还具备一个特性，因其具有报警设定点，特别适用于有过滤器的应用场合，当过滤器脏了后，DM-1000将会闪烁报警，提醒客户需要进行维护等操作。
对DM-1000系列进行编程，仅仅需要通过菜单键进入4个醒目的子菜单，通过它们可以设定安全等级、选择工程单位、更改K系数（当使用不同的皮托管或流量传感器时）、设定圆形或方形管道尺寸（测量体积流量时）、更改过滤器设定点、查看/峰值数据、设定数字阻尼值用来平滑读数（用于读数波动较多的过程应用）、高级显示模式（用以节省电池），现场校准零点及量程。
DM-1000系列数字式差压表/风速表，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具有多种供电方式，可以使用9-24VDC电源模块供电，也可以使用9V电池供电。而当使用电源模块供电且仪表具有9V电池时，电池将起到备份的作用，即当停电时9V电池将自动启动，使仪表继续正常运行。
型号
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.
