Extech Instruments 45170, User Manual

45170 –EU-EN-V1.2-5/11 

3 

Operation 

Turn Power ON 

Press the power button to turn power on. The meter will perform a short self-test. 

A. Air 

Velocity 

Measurements 

1. Press 

the 

Function

 button to select the Anemometer mode. In Air Flow mode, the 

display will show Air Velocity and Temperature. 

2. Press 

Unit/Zero

 button to select desired unit of measure (FPM, MPH, KNOT, KM/H, or 

M/S) and face the Air Flow Sensor towards the source of wind.  

3.  Allow time for the reading to stabilize and note value. From a practical point of view the 

velocity may fluctuate slightly.  

B.  Humidity and Ambient Air Temperature  Measurements 

1. Press 

the 

Function

 button to select RH mode.. In RH mode, the display will show %RH 

and Temperature. 

2.  Press the °

C/°F

 button to select the desired temperature unit of measure. 

C.  Temperature Measurements Using Type K Thermocouple 

1. Press 

the 

Function

 button to select the Temperature mode. In Temperature mode, the 

display will show only temperature. 

2.  Plug the thermocouple into the meter's thermocouple input jack. If no thermocouple is 

connected, or if the thermocouple is defective, the meter will display    “

-----

“. (Primary 

display temperature will only work if a thermocouple is connected). 

D.  Light Measurements  

1. Press 

the 

Function

 button to select the Light Meter mode . The light values are 

displayed and orientated 180° from the other functions for easy use. 

2.  Press  the 

Lux/Ft-cd 

to select Lux or Footcandle units of measure. 

3.  Before making  measurements “Zero” the meter out by blocking the light sensor to 

simulate a no light condition and pressing the 

Unit/Zero 

button.The reading should go 

to Zero.  

4.  Hold the sensor toward the light source and note reading.  

MIN, MAX, Data Recording Function 

1. Press 

the 

Max/Min

 button once. The RECORD symbol will appear on the display.This starts 

the Min/Max Data Recording Mode

.

2. Press 

the 

Max/Min

 again and the 

MAX

 symbol along with the maximum value will appear on 

the display.  

3. Press 

the 

Max/Min

 once more and the 

MIN

 symbol along with the minimum value will 

appear on the display.  

4. To 

Clear

 the recorded Max/Min values press the 

HOLD

 button once. Press and Hold the 

Max/Min 

button for 3 seconds  to exit Min/Max Data Record Mode and return to normal 

measurement mode. Record and Max/Min will disappear from the display once this is done.