AFH2型 風(fēng)量罩用于監(jiān)測(cè)進(jìn)排風(fēng)口，通風(fēng)裝置等的風(fēng)量。它平均測(cè)量值可以以各種工程單位顯示風(fēng)量，還能手動(dòng)記錄在一定時(shí)間段的測(cè)量值。它采用數(shù)字顯示，測(cè)量精度高，可設(shè)置為每隔一定的時(shí)間自動(dòng)較零。風(fēng)罩都配備有磁性安裝件，拆卸和組裝都非常方便。另外還帶有電池低電量報(bào)警，以避免測(cè)量不準(zhǔn)確。它重量輕，可靠耐用，全部都可裝在可攜帶的旅行箱內(nèi)。
采用高精度數(shù)顯差壓計(jì)來(lái)測(cè)量風(fēng)量
Service: Air.
Volume Flow Rate Units: CFM, L/S, M3/Hr.
Volume Flow Ranges:
Supply: CFM: 41 To 1176; L/S: 19 To 555; M3/Hr: 69 To 2000;
Exhaust: CFM: 45 To 1176; L/S: 21 To 555; M3/Hr: 76 To 2000.
Volume Flow Ranges With Low Flow Kit:
Supply: CFM: 25 To 1176; L/S: 12 To 555; M3/Hr: 43 To 2000;
Exhaust: CFM: 29 To 1176; L/S: 14 To 555; M3/Hr: 49 To 2000.
Accuracy @ 20°C (68°F):
Supply: ±3% Of Reading ±9 CFM (±4 L/S, 14 M3/Hr);
Exhaust: ±3% Of Reading ±9 CFM (±4 L/S, 14 M3/Hr).
Span Stability V. Temperature: Better Than 0.1% Of Range In Use Per 2°F (1°C).
Zero System Accuracy: ±1 Count (±0.05 Pascal Typical; ±0.0002 In W.C.).
Temperature Limits:
Operating: 32 To 122°F (0 To 50°C);
Storage: 23 To 122°F (-5 To 50°C).
Thermal Effect: ±0.1% Of Range In Use Per 2°F (1°C).
Zero Drift: Negligible Due To Auto Zero System. When Auto Zero Set At 30 Second Intervals (2 Minute Warm Up).
Orientation Effect: Any 45 Degree Change 0.0004 In W.C. (0.1 Pascal) Typical.
System Air Leak: 0.366 In3/Hr (0.1 Ml/Min) @ 20 In W.C. (5 KPa) Typical.
Maximum Differential Pressure: 60 In W.C. (15 KPa).
Auto Ranging Display: 0.375" High Digits.
Resolution: 1 CFM, 1 L/S, 1 M3/Hr.
Output: RS-232 Serial Interface (Baud Rate 9600).
Memory Capability: 2500 Readings In Any Engineering Unit.
Power Requirements: 8.4 V NiMH Battery, Installed Functional, User Replaceable (Optional 9 V Alkaline Battery May Be Used In Place Of Rechargeable).
Dimensions: 30" X 24" X 24" (965 X 610 X 610 Mm). Hood Only: 2' X 2' (600 Mm X 600 Mm).
Weight: 8.8 Lb (4 Kg).
Agency Approval: CE.
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