Extech Instruments 45170 User manual

User's Guide
4-in-1 Humidity, Temperature Airflow
and Light Meter
Model 45170

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Introduction
Congratulations on your purchase of Extech’s Model 45170 4-in-1 Humidity, Temperature, Airflow
and Light Meter. With careful use, this meter will provide years of reliable service.
Meter Description
1. Vane Airflow Sensor
2. Type K Thermocouple Input Jack
3. Display
4. Power Button
5. Unit /Zero Button
6. C°/F° /Lux/Ft-cd Button
7. Light Sensor
8. RH and Air Temperature Sensors
9. Hold Button
10. Max/Min Button
11. Function Button
1
2
3
4
5
6
7
8
9
10
11

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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.

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Data Hold
Press the HOLD button to freeze the reading in the display. The 'HOLD' icon will appear on the
upper right-hand side of the display. Press the HOLD button again to return to normal operation (the
'HOLD' hold icon will disappear).
Auto Power OFF
The meter will automatically turn off after 10 minutes if no keys are pressed during this period. Auto
power off is disabled in the max/min recording mode.
Turning Power OFF
Press the power button to turn power off.
You, as the end user, are legally bound (EU Battery ordinance) to return all used
batteries, disposal in the household garbage is prohibited! You can hand over your
used batteries / accumulators at collection points in your community or wherever batteries
/ accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
Useful Equations
Area equations
Cubic equations
CFM (ft3/min) = Air Velocity (ft/min) x Area (ft2)
CMM (m3/min) = Air Velocity (m/sec) x Area (m2) x 60
A = pi x R 2
R
A = W x H
W
H

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Specifications
Range Specifications
Measurement Range Resolution Accuracy
MPH (Miles per hour) 0.9 to 67.0MPH 0.1MPH
km/hr (kilometers per hour) 1.4 to 108.0 km/h 0.1km/h
Knots (nautical miles per hour)
0.8 to 58.3 knots 0.1knots
m/sec (meters per second) 0.4 to 30.0 m/s 0.1 m/s
ft/min (feet per minute) 80 to 5910 ft/min 1ft/min
≤ 3937 ft/min: ±3% F.S.
> 3937 ft/min: ±4% F.S
Temperature/Thermistor 32 to 122oF (-0 to 50oC) 0.1oF/C ± 2.5oF (± 1.2oC)
Temperature /Thermocouple -148 to 2372°F
-100 to 1300°C
0.1°F
0.1°C
± (1% + 2°F)
± (1% + 1°C)
Relative Humidity 10.0 to 95.0% 0.1% ±4% RH (from 10% to 70%RH)
±4%rdg +1.2% RH (> 70% RH)
0 to 2,200 Lux 1 Lux
1,800 to 20,000 Lux 10 Lux
0 to 204.0 Fc 0.1 Fc
Light (Auto Ranging )
170 to 1,860 Fc 1 Fc
±5% rdg +8 digits
General Specifications
Display 4 digit (9999 count) Dual Display LCD
Sensors Thin film capacitance humidity sensor
Min/Max Min/Max recalls the highest/lowest reading
Data Hold Data Hold freezes the display
Operating conditions 0 to 50oC (32 to 122oF) / < 80% RH
Power supply 9 Volt Battery
Dimensions / Weight Instrument: 156 x 60 x 33mm( 6.14 x 2.36 x 1.29”)
Vane: 24mm ( 1”) diameter / 160 g (5.7 oz)
Copyright ©2011 Extech Instruments Corporation (a FLIR company)
All rights reserved including the right of reproduction in whole or in part in any form.
www.extech.com