Aero
Electronics
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AEO KV/RPM Meter Instruction Manual
062314
Specifications:
Working Temperature Range: -20℃ to 50℃
Weight: 21g
Dimension: 33x 69x 11mm
Working Voltage Range: 8-25V
Product Application:
1, Measure the rpm and kv for brushless motors at
no-load or loaded, and display the voltage for the battery
at the same time.
2, Using one of the additional accessories (Hall Rate
Sensor Module), the rpm and kv of brushed motors can
also be measured.
Advertising High Light：
[1], Electromotive force applied. More exact, easier to use, ultra portable and multifunctional.
[2], The Hall Rate Sensor Module. It allows measurement of rpm to be made on mechanically
rotated devices.
[3]. High performance CMOS chip. KV displayed instantly.
[4], Easy to use. just need to clip one of the three motor wires for measuring, no additional
power supply required.
[5]. RPM and kv can be also measured and displayed when motors running at 1S 3.7V lipo,
or even less.
How to use：
1．Introduce：
There are 5 pins on Kv meter:"+","-","signal","+","-".The kv
meter comes with a connecting cable,at one end is servo
plug,the other end is a alligator clip, and a dual T-plug with
male and female connectors.
Input voltage of K1 is 9-25V.
(1) Connect the servo plug to the 3 pins of the K1.
(2) Connect the T-plug between battery and ESC.(A
battery with voltage ≥9V is required.)
(3) Connect the alligator clip to any one of the 3 wires between the ESC and motor.
(4)Set the “number of magnet poles” of the motor, using B button. Note that the magnet poles
number showed as “pairs”, For example, 14 poles motor will be correctly entered as P:07,which is 7
pairs.
(5) Run the motor at WOT(wide-open/full throttle). Voltage, rpm, magnet poles number and KV will
be displayed.(this should be recorded, since the display is not retained and disappear once the
test-run is over).
*Any one of those parameters can be selected to display as “main display” by cycling through,
using A button.
Copyright 2005-2009 Aero Electronics Operations(AEO Tech) , All Rights Reserved
http://www.aeoRC.cn
Aero
Electronics
Operations
http://www.aeorc.com
2．Measuring when the voltage is below 9V:：
An additional power supply (≥9v) should be used to connect with the remaining “+” “-“ pins if
the motor system works with the voltage below 9V.
Picture 1,A red JST plug connects a ≥9 power source to the “+” “-“ pins of the K1.
Picture 2,kv meter displays"3965mV" ,that means the battery voltage is 3.965V.Then connect
the yellow alligator clip to one of the three cables of ESC or motor, when the motor runs, the
measuring is beginning.
Picture 3 shows the connector leads (Y-plug to micro JST) used when testing rpm/kv on 1S
battery. <9v
（picture 1）
（picture 2）
（picture 3）
3. Display details:
When the power is on, there are 4 parameters displayed on the screen: voltage, rpm, kv, number of
magnet poles. *Any one of those parameters can be selected to display as “main display” by cycling
through, using A button:
A. Voltage-11123mV-indicates the voltage of the battery or power
supply as 11.1V
B. Kv-000000kv-computed from the voltage and the no-load rpm.
C. RPM-0000000rpm-the no-load or on-load rpm at this voltage.
D. Number of the pairs of magnet poles-P:06 indicates a 12-pole
motor.
4. Buttons on the Kv meter:
2 buttons on the Kv meter:
Button A is used to choose the parameter displayed on the screen as main display.
Button B, used to set the correct number of pairs of magnet poles.
5. Attention:
(1) Testing voltage range: 1V-25V
(2) Due to the nature of LCD, it's quite normal for refresh rate for the display to be slow.
(3) Make sure the power off after the measuring.
(4) This Meter is suited only to measurements of RPM/Kv for brushless motors, unless the
“additional accessory” Hall Rate Sensor is used.
(5) Calculation of Kv requires that the motor be run, no-load, at WOT (Wide-Open/Full Throttle).
(6) Measurements may be less accurate for certain micro-motors, if they have very weak
magnets.
(7) For high Kv motors, in particular, no-load test runs need to be short
Copyright 2005-2009 Aero Electronics Operations(AEO Tech) , All Rights Reserved
http://www.aeoRC.cn