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Descriptions:
Our servo tester kit can be synchronized output control 4 servos and used to compare the performance steering gear control of the steering servo output signal can be accurate to 2us (1 milliseconds = 1000 microseconds).
You can test the steering gear is able to respond to subtle changes with PPM signal test function in the display: The input PPM signal changes while the input the PPM signal synchronization output to the servo. Energized automatically enter manual mode (Manual) 20us 50H analog servo signal cycle, frequency 50Hz, rotary potentiometers to decrease or increase the width of the output pulse.
Button the Select (Note: the key switch function, circulation patterns)
1. S-1 manual mode (Manual)
2. S-2-bit mode (Neutral)
3. S-3 automatic mode (Automatic)
Keys pulse width:
1. 50H analog servo signal cycle 20us frequency 50Hz
2. 125H digital the steering gear a signal cycle 8us frequency 125HZ
3. 250H Digital Servo signal cycle 4us frequency 250Hz
Specifications:
Brand: HJ
Item name: Servo Tester for RC Airplane
Material: Plastic
Color: Blue + black
Input voltage: DC 5~6V
Output signal width: 800~2200us
Package size: 14 * 10 * 3cm / 5.5 * 3.9 * 1.2in
Package weight: 39g / 1.4oz
Warning:
Digital or analog signal button to select the corresponding servos and then plug in the steering servo, to avoid damage to the steering servo.
Package list:
1 * HJ Digital Servo Tester / ESC Consistency Tester
Ryan Fleming
2025-08-27 12:05:19
Worked great to center and test sg90 servos for a droid build
Jay Isaacs
2025-08-13 16:37:51
Love this little guy, Just what's with the pin diagam?
Stephen M.
2025-08-10 17:49:59
This unit works well, however I rate it a 4 because of the lack of instructions. Also there was no indication in the ad as to how to power it, I had to search on YouTube for guidance. Amazon sells a 4xAA battery holder with the correct connector to power it.Once powered it is a simple matter to plug in a servo to test.
Corey Pratt
2025-04-08 19:37:25
Product came in great shape and early
Blimey556
2025-03-11 14:35:43
I tested this on an oscilloscope because I wanted to see how close it was to a real system. I was pretty impressed with how accurate this tool is. The PWM signals were about as accurate as you could hope for without a better trim pot (adjustment knob). So I would have to give this little unit big thumbs-up. It's small and cheap enough to keep in your tool box. Never had the need for one before, but this is well worth it.
Dave
2025-03-04 11:38:38
Not the best tester, but works
Aaron w.
2025-03-01 10:03:38
This has been the BEST style of these testers I’ve had to so far. ((Yes your eyes aren’t deceiving you, I have stuck a RC Brushless motor (Surpass Hobby Rocket 4268) into a Makita Blower (XBU05) and a 130A FlyColor ESC with the FlyColor WiFi chip)) Don’t waist you time and money with those blue wrapped ones with the board exposed trying to save a buck. Those other ones have let their smoke out on first test well within their voltage specs. Some of the others have quit simply by adjusting the pot, others have shorted out my equipment.I’ll update my review should anything change , but so far this is the best I’ve ever used ( for reference my usage of this device will be multiple times a day 5-7 days a week for the foreseeable future)
Epillon
2025-01-26 20:55:57
The media could not be loaded.
Neil
2025-01-24 16:08:34
This is a convenient little unit, but it's limited to only 800-2200 μs pulse width, so it only uses about 120°of SG90 servos (which have a range of 500-2500 μs).The "sweep" setting is supposed to be variable speed but its speed is constant, regardless of the dial setting.It doesn't come with any useful instructions (the packaging has very limited info) so I had to look up how to use it on YouTube, and the labeling on the device is unclear. The "S+I" label is actually "Signal, Positive, Negative" and refers to order of the first column of 3 pins (Signal at top). The remaining 4 columns of pins are for servo motors, with the same pin order (Signal, Positive, Negative) as the input pins.Using an external PWM signal overrides all functions of the device (external PWM cannot be toggled from the device), effectively turning 1 servo connection into a 1-channel, 4-port connection.The device will sometimes (erratically) switch between signaling frequencies (50/125/250 Hz) when switching between modes, causing motors to buzz & jitter until the frequency setting is switched back to 50Hz.FYI: the device does NOT show the pulse width of an external signal.
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