Description
Testo 417 Vane Probe Anemometer
Also available with a case. See the kit here!
The high quality bearings in the testo 417 yield nearly "friction-free" rotation for direct measurement of air velocity with an NTC sensor used to determine air temperature. The vanes cover all the measured area - no airflow is lost between the vane and outer ring.
The 4" head averages true flow over its entire area, not just responding to local stray eddies. Just input the duct cross-sectional OPEN area (from 0.2 sq. in. to over 107 sq. ft. (15,498 sq. in.)) to see accurate, real-time CFM calculations. Simply toggle between velocity, CFM, and temperature readings on the clear, back lit display. Simply tap the ON/OFF key when the unit it is ON to toggle the back-light.
Flow direction is indicated by an arrow in the display. timed or multi-point averages are easily accomplished with all parameters and calculations. Min-Max values can also be displayed. The "Hold" function freezes current readings in the display making data recording easy.
The primary advantages of vane anemometers are speed, accuracy, and ease of use. Vane anemometers do not require air density compensation due to air temperature, humidity, or atmospheric pressure. The large vane is ideal for verifying proper velocities from supply and return registers and performing proportional balancing of HVAC systems. This tool should be on every technician's truck.
Features:
- True velocity measurement - no air density correction required
- Simple one hand operation
- Easy to carry and operate
- Adjustable A(K) factor (open area of grille)
- Required for proper systems commissioning
- Long battery life
- Built-in 3.93 in. vane
Specs
- Temperature Measurement Range: 32 to +122°F
- Accuracy: ±0.9 °F
- Resolution: 0.1 °F
- Air Velocity Measurement Range: 59.1 to +3937 fpm
- Accuracy: ±(19.7 fpm +1.5% of measured value)
- Resolution: 1.97 fpm
- Volume Flow
- Measurement Range: 0 to +58,857 CFM
- Measurement Range: 0 to +259 CFM when used with the funnel set 0563 4170
- Measurement Range: 01 to +118 CFM when used with the funnel set 0563 4170 & flow straightener 0554 4172
- Resolution: 0.1 CFM (0 to 58.8 CFM) 1 CFM (59 to 58,857 CFM)
The CFM displayed across the area being measured depends on the internal calculation:
CFM = Velocity (in FPM) x Area (in Sq. Feet)
Where the user enters the Area data in square inches and the 417 converts to square feet.
For example:
The CFM measuring range across the area of the 4" diameter head is basically 5 to 350 CFM
Head area = 0.087 sq ft
Velocity range = 50 to 38040 FPM
CFM range across 4" head = 50 x 0.087 to 3940 x 0.087 = 4.35 CFM to 343 CFM
- Storage Temperature: -40 to +158 °F
- Operating Temperature: 32 to +122 °F
- Battery Type: 9V battery
- Battery Life: 50 hr.
- Weight: 8 oz.
- Dimensions: 11 x 4 x 2 in.
Includes
- testo 417 rotating vane anemometer with built-in 4 inch vane
- battery
- calibration certificate
Videos
Resources
1) DETERMINE the OPEN AREA as follows: On
FOR EXAMPLE: We have a supply grille that is 6x10 inches with 65% open area. The open area is 6 x 10 x 0.65 = 39 sq inches open area
2) ENTER the OPEN AREA into the 417.Turn ON the 417, after a few seconds the display comes up. PRESS AND HOLD the
3) EXIT to measuring mode by pressing the RETURN ARROW (Hold/Max/Min Key) 5 times
4) MEASURE: Place the 4" vane into the air stream in front of the grille position it at one corner of the grille, parallel to the grille surface. A) Press the MEAN key TWICE to enter the timed average mode. B) Press the RETURNkey (Hold/Max/Min Key) when you want to start collecting data. C) Keep the 417's measuring head about 1" away from the face of the grille. Move the 417 head across the grille at a rate of about 1 foot (12") over 4 seconds. (note the timer on the 417's screen) D) Be sure to "paint" the entire grille face with head of the 417 to account for total flow through the grille.DO NOT paint any area more than once! E) When you are done covering the entire grille area, press the RETURN key (Hold/Max/Min Key) again to pause the reading on the display.
OPTIONAL: You can measure again (re-paint the entire area) to improve the reading. Just start at step 4B.
5) DISPLAY the average values by pressing the MEAN key. The Timed MEAN icon will flash and the average Feet Per Minute (FPM) will be displayed. Tap the VOL key once to see the Average CFM for this test. Tap the VOL key again to see the Average Temperature for this test. Tapping the VOL key continues rotating thru these three results.
NOTE: BE SURE to record the data, as there is NO memory storage in the 417. Once you tap the
6) CLEAR the data and prepare for another measurement by tapping the MEAN key
** One manufacturer's data books give open area factors of from 71% to 75% for one type of floor diffuser (depending on size), 66% to 75% for another model and 65% to 75% for another model. While a heavy duty, dual shutter floor grille from the same manufacturer has a range of 48% to 52% open area factor. Generally speaking, the larger the grille dimension, the small the open area factor.