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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › RX battery load tester
07-15-2002 04:11 PM  16 years agoPost 1
Mujenpwr

rrApprentice

Mickleton, NJ

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What do you guys like for field load testing 5 Cell and 4 Cell RX batteries?

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07-15-2002 04:42 PM  16 years agoPost 2
BladeRunner

rrElite Veteran

Ontario Canada. Member of "some sort" s

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Field testing?
I'm using a Hobbico digital voltmeter/checker. It has a switchable load feature that places a 300ma load on 4.8V / 9.6V to check RX & TX packs. Not sure about the 5cell. It might work for that.....I haven't tried it........

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07-15-2002 05:52 PM  16 years agoPost 3
Mujenpwr

rrApprentice

Mickleton, NJ

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Thanks, I will take a look at the Mk3 version that is out.

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07-15-2002 09:58 PM  16 years agoPost 4
Hughes500Pilot

rrKey Veteran

Anaheim, CA

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Field Testing RX Batttery Packs
I use my Futaba 9Z radio to check the voltage of my flight packs. The 9Z lets you check the idle voltage. It also test them under 250ma or 500ma loads. It displays the digital voltage readout on the LCD screen. -Steve

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07-15-2002 11:35 PM  16 years agoPost 5
BladeRunner

rrElite Veteran

Ontario Canada. Member of "some sort" s

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Tester?
Cool, I bet your 9Z costs a couple of bucks more than my Hobbico!!!...........

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07-17-2002 08:53 PM  16 years agoPost 6
rcdon

rrNovice

Newark, DE

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I went to Radio Shack and got a little project box, some banana plugs and receptacles, some wire, a momentary pushbutton switch, and a potentiometer rated for 0-50 ohms and 5 watts (IIRC), plus a knob for the potentiometer. It was easy to drill a few holes in the box and solder up the circuit.
I plug a charging cable into the unit, which itself plugs into a cheap voltmeter. When I push the switch, the load is applied across the Rx battery. Otherwise, I'm reading the open circuit voltage. I calibrated the unit by measuring the resistance with an ohmeter, and I made little marks for (nominal) 250 mA and 500 mA settings for 4.8 and 6.0 volt packs. Total cost was about 5 bucks, minus the charging jack.
Make sure the potentiometer is rated for the power it will dissipate, otherwise you might smoke it if you keep the button pushed for a while.

HHH,

Rod

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07-18-2002 01:24 AM  16 years agoPost 7
ncostes

rrVeteran

Va, US

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I paid $0.55 for a connector from servocity.com and soldered the appropriate value power resistor inline ($0.50), and a banana plug on the other end. This now plugs into my DMM and I'm good to go

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