CEM Instruments DT-90 Bluetooth Thermo-Anemometer User Manual
- June 5, 2024
- CEM Instruments
Table of Contents
Thermo-Anemometer
User Manual
Introduction
The Thermo-Anemometer measures Air velocity and temperature. Careful use of this meter will provide years of reliable service.
Meter Description
- -LCD Display
- -Body of meter
- -Fan
- -HOLD/ button
- -MAX/MIN button
- -Power on/off button
- -UNITS button
- -Bluetooth button
Button Description
Power on/off, Auto-power off:
Power on: Short press button “ **** ” to power on, system default auto
power off. Long press to power on and disable the auto power-off function.
Long press the button again to enable the auto power-off function
Power off: Short press the button “ ****” to power off.
Auto-power off: Auto-power off signal ” ” displays in the left corner of the LCD and the instrument will auto-power off in 10minutes of no button operations.
If I press the power on/off button for over 1 minute, it will be recognized as faulty operation and the instrument will auto power off.
UNITS button: Short press to switch air velocity unit; Long press to switch temperature unit.
button: Long press to active or deactivate Bluetooth.
HOLD/ r button: Short press to hold the current data; Long press to activate or deactivate the backlight.
MAX/MIN button: Short press to record Maximum, Minimum, and Average readings of temperature and air velocity.
Note: MAX/MIN button is deactivated when hold the current readings.
Display Layout
: Bluetooth symbol
: Low battery indicator
: Timing power-off symbol
MAX: Maximum reading of temperature/air velocity
MIN: Minimum reading of temperature/air velocity
AVG: Average reading of temperature/air velocity
HOLD: Hold the displayed temperature/air velocity readings.
°C/°F: Temperature measurement unit
m/s, ft/min, km/h, MPH, knots: Air velocity measurement unit. Larger
LCD digits at bottom of the display are Air Velocity readings Smaller LCD
digits at the top, and right of the display is Temperature readings
- Data Hold
Short press the hold button to freeze the temperature and velocity readings, meanwhile, the hold symbol is displayed on the LCD when measured. Press the hold button again to return to normal measurement.
- Temperature and Air velocity measurement
- -Turn on the instrument by pressing the power on/off button.
- -Press the UNITS button to select a unit of measurement. Note: After power is on, the meter will display the preset unit before the last power off.
- -Put the instrument environment that is to be measured.
- -Observe readings on the LCD display, The larger digits displayed on the main LCD is Air Velocity reading. The smaller digits displayed on the upper right LCD are the temperature reading.
- MAX/MIN/AVG reading
- -Press MAX/MIN button for the first time, the instrument will enter Max tracking mode, and the tracked max reading will display on the LCD.
- -Press MAX/MIN button for the second time, the instrument will enter Min tracking mode, and the tracked min reading will display on the LCD.
- -Press MAX/MIN button for the third time, and the instrument will enter Avg tracking mode, the tracked average reading will display on the LCD.
- -Press MAX/MIN button for the fourth time, and the current reading will display on the LCD.
Note: Avg mode will automatically stop in 2hours and the instrument will auto power off
- Bluetooth communication
Long press the Bluetooth button to activate the Bluetooth function, it communicates after connecting with the software. The instrument can transmit measured data and instrument status to software and the software can control the instrument.
The instrument will automatically turn off in order to lengthen the battery working life. When the symbol appears on the LCD, please replace the old battery with a new one.
- -Open the battery compartment with a suitable screwdriver.
- -Replace the 9V battery.
- -Mount the battery compartment again.
Specifications
| Air velocity | Range | Resolution | Accuracy |
|---|---|---|---|
| m/s | 1.10∼25.00m/s | 0.01m/s | ± (3%+0.30m/s) |
| km/h | 4.0∼90.0km/h | 0.1km/h | ± (3%+ 1.0km/h) |
| ft/min | 220∼4920ft/min | 1ft/min | ± (3%+40ft/m) |
| MPH | 2.5∼56.0MPH | 0.1MPH | ±(3%+0.4MPH) |
| knots | 2.2∼48.0knots | 0.1 knots | ± (3%+0.4knots) |
| Air temperature | -10∼60°C(14-140°F) | 0.1°C/°F | 2.0°C(4.0°F) |
| Display | Dual-line, 4-digit LCD | ||
| --- | --- | ||
| Display Update | 2 times/sec | ||
| Sensors | Air velocity sensor; NTC-type precision thermistor | ||
| Automatic Power-off | Auto shut off in 10 minutes without operation to |
preserve battery life
Operating Temperature| 0 to 50°C(32 to 122°F)
Storage Temperature| -10 to 60°C(14 to 140°F)
Operating Humidity| <80%RH
Storage Humidity| <80%RH
Operating Altitude| 2000 meters(7000ft)maximum
Battery| One 9 volt battery
Low battery indication| The low battery signal “ flashes when battery
voltage drops below 7.2V; The backlight and low battery signal “ ” flash twice
when battery voltage drops below 6.5V, then auto power off.
Weight| 172g
Dimensions| 2135436mm
Unit of Measure Conversion Table
| m/s| ft/min| knots| km/h| MPH
---|---|---|---|---|---
1 m/s| 1| 196.87| 1.944| 3.6| 2.24
1ft/min| 0.00508| 1| 0.00987| 0.01829| 0.01138
1knot| 0.5144| 101.27| 1| 1.8519| 1.1523
1km/h| 0.2778| 54.69| 0.54| 1| 0.6222
1MPH| 0.4464| 87.89| 0.8679| 1.6071| 1
°F=°C*9/5 +32
Rev. 160908