Related Manuals for Extech Instruments HD350
Summary of Contents for Extech Instruments HD350
- Page 1 User Guide Extech HD350 Pitot Tube Anemometer Differential Manometer Heavy Duty Pitot Tube Anemometer and Differential Pressure Manometer Model HD350 netzerotools.com...
- Page 2 Introduction Congratulations on your purchase of the Extech HD350. This handheld meter measures and displays air velocity (speed), air flow (volume), ambient air temperature, and gauge/differential pressure. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
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Page 3: Meter Description
KEYPAD NOTE: In Setup mode several buttons have special uses not detailed above but are described in subsequent sections of the manual. NOTE: Battery Compartment, Tilt Stand, and Tripod Mount are located on the reverse side of the meter. HD350-EU-EN V3.1 07/13 netzerotools.com... -
Page 4: Display Description
14. Reading (sample) number 15. Memory indicator 16. REC, MAX, MIN and AVG indicators 17. Temperature units for the primary display 18. Units of measure for air flow 19. Temperature units for the secondary display 20. Secondary display (Temperature) HD350-EU-EN V3.1 07/13 netzerotools.com... -
Page 5: Setup Mode
3. Use the arrow keys to scroll to the desired setting. 4. Press the AVG REC button to store the new setting in memory. Note: The Setup mode is disabled when the meter is in the MIN-MAX-AVG mode. HD350-EU-EN V3.1 07/13 netzerotools.com... - Page 6 15. Edit the Height value in the same manner as the Width value. 16. Press the AVG REC button to store the Height value. 17. Press and hold the SETUP button for two (2) seconds to exit the Setup mode. The ‘SETUP’ display icon will switch off. HD350-EU-EN V3.1 07/13 netzerotools.com...
- Page 7 4. Use the arrow keys to change from ‘OFF’ to ‘ON’ or ‘ON’ to ‘OFF’. 5. Press the AVG REC button to save the setting. 6. Press and hold the SETUP button for two (2) seconds to exit the Setup mode. The ‘SETUP’ display icon will switch off. HD350-EU-EN V3.1 07/13 netzerotools.com...
- Page 8 6. Press the AVG REC button to clear the selected reading types. The meter will beep indicating that that the delete process was successful. 7. Press and hold the SETUP button for two (2) seconds to exit the Setup mode. The ‘SETUP’ display icon will switch off. HD350-EU-EN V3.1 07/13 netzerotools.com...
- Page 9 With the Pitot tube open to ambient conditions press and hold the HOLD ZERO button for 2 seconds to zero the display. Put the mouth of the Pitot tube in the direction of the oncoming air mass under test and read the Air Velocity measurement value on the LCD. HD350-EU-EN V3.1 07/13 netzerotools.com...
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Page 10: Additional Functions
1. Press the HOLD ZERO button to freeze the presently displayed reading on the display. The display will show the HOLD icon while in the Data Hold mode. 2. Press the HOLD ZERO button again to exit the Data Hold mode and return the meter’s display to real time operation. HD350-EU-EN V3.1 07/13 netzerotools.com... - Page 11 Storing, Recalling, and Averaging Readings The HD350 can store up to 99 readings in its internal memory for each of the three measurement modes (Air Velocity, Air Flow, and Pressure) for a total of 297 readings. Momentarily press the SAVE CLEAR button to store a reading. When the internal memory is full (99 readings) the meter will display ‘FU’...
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Page 12: Battery Replacement
USB PC Interface and Software The HD350 is equipped with a USB communication jack on its upper left side. The supplied communications cable connects to this jack and to a USB port on a PC. The supplied software allows the user to view and save readings to the PC. -
Page 13: Specifications
(10 to 30 C) 75% RH (30 to 40 C) 45% RH (40 to 50 C) without condensation Dimensions / Weight Main instrument: 210 x 75 x 50mm (8.2 x 2.9 x1.9") Weight 280g (9.8 oz.) HD350-EU-EN V3.1 07/13 netzerotools.com... - Page 14 Range Indicator Over range: Err.1; Under range: Err.2 Units Range Resolution 0.7252 0.0001 mbar 50.00 0.01 inH2O 20.07 0.01 mmH2O 509.8 5000 Temperature Specifications Temperature Range Resolution Accuracy 0 to 50.0 ±1.5 32.0 to 122.0 ±3.0 HD350-EU-EN V3.1 07/13 netzerotools.com...
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Page 15: Useful Equations
Cubic equations CFM (ft /min) = Air Velocity (ft/min) x Area (ft CMM (m /min) = Air Velocity (m/sec) x Area (m ) x 60 NOTE: Measurements made in inches must be converted to feet or meters. HD350-EU-EN V3.1 07/13 netzerotools.com...
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