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Summary of Contents for Extech Instruments SDL350-NIST
- Page 1 USER MANUAL Hot Wire Thermo-Anemometer with Datalogger Model SDL350 Hot Wire...
- Page 2 This instrument is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit the Extech Instruments website (www.extech.com) to check for the latest version of this User Guide. Extech Instruments is an ISO-9001 certified company.
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Page 3: Operation
Operation Power ON-OFF Power the meter ON or OFF by pressing and holding the power key for at least 1.5 seconds. Meter Functions This meter has three modes of operation: Air velocity (with temperature), thermocouple temperature, and Air Volume (CFM/CMM). Press and hold the FUNCTION key for at least 1.5 seconds to switch from one mode to the other. - Page 4 Air Flow (Volume CFM/CMM) First measure and note the area of the duct or other passageway under test in square feet or square meters. For rectangular ducts, area is calculated using Length * Width; for circular ducts use 3.14 * R Enter the area value in the SETUP mode (refer to SETUP mode section for details).
- Page 5 System Reset If the meter’s keys become inoperable or if the display freezes, the Reset button can be used to reset the instrument. Use a paper clip or similar item to momentarily press the reset button located on the lower right side of the instrument under the snap-off compartment cover.
- Page 6 Automatic Datalogging In automatic datalogging mode the meter takes and stores a reading at a user-specified sampling rate onto SD card. The meter defaults to a sampling rate of one second. To change the sampling rate, refer to the Setup Mode section (the sampling rate cannot be ‘0’ for automatic datalogging): To begin an automatic Datalog session press and hold the LOG key for at least 1.5 seconds.
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Page 7: Setup Mode
RS-232/USB PC Interface For streaming of data to a PC via the RS232 Output jack, the optional 407001-USB kit (RS232 to USB cable and driver CD) along with the 407001 software (available free at www.extech.com/sdl350) are required. Setup Mode Basic settings at a glance To view the current configuration of the meter with regard to time, date, thermocouple type and datalogging sampling rate, press the SET/CLOCK ICON key momentarily. - Page 8 Setting the Datalogger Sampling Time (Rate) Access the SP-t parameter. Use the arrow keys to select the desired sampling rate. The available settings are: 0, 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, and 3600 seconds. Press the ENTER key to confirm the entry. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).
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Page 9: Battery Replacement And Disposal
Set the Temperature Units of Measure (°C or °F) Access the t-CF parameter. Use the arrow keys to select °C or °F. Press ENTER to confirm setting. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode). -
Page 10: Specifications
Specifications General Specifications Display Backlit LCD; LCD size: 52 x 38mm (2 x 1.5”) Sensor types Hot-wire thermistor for air velocity and air flow measurements Thermistor for temperature sensor built into hot wire probe Thermocouple for remote temperature measurements Measurement Units Air velocity: m/S (meters per second) Km/h (kilometers per hour) Ft/min (FPM;... - Page 11 Electrical Specifications (Ambient Temperature 23°C ± 5°C) Air velocity Measurement Range Resolution Accuracy 0.2 - 5.0 m/s 0.01 m/s (meters/second) 5.1 – 25.0 m/s 0.7 - 18.00 km/h 0.01 Km/h (kilometers/hour) ± (5%rdg + x) 18.0 – 72.0 km/h ± (1%FS + x) 0.5 –...
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