Great Planes GPMM3220 User Manual

™

Power Meter with Balancing

INSTRUCTION MANUAL

INSTRUCTIONS

The PowerMatch meter is a perfect device for matching electronic
components to optimize electric fl ight performance and satisfaction.
An easy-to-read 216 LCD, easy menus, and high quality input/
output connections make it simple to measure cell voltages, pack
voltages, current, power, remaining battery capacity, and more!
Match propellers to motors for optimum performance. Match battery
packs to motors. Determine system loads. It even includes a built-in
balancer which is perfect for conditioning up to 7S LiPo or LiFe
packs! The PowerMatch meter is an extremely handy and useful
tool for the workbench or fl ight line.

It is strongly recommended to completely read
this manual before use! Damage resulting from
misuse or modifi cation will void your warranty.

GPMM3220 v2Entire Contents © 2015 Hobbico,® Inc. All rights reserved.

SPECIFICATIONS

Battery Types

LiPo, LiFe, Li-Ion, NiCd,
NiMH with auto-detection

Voltage Measurement Range

4– 8 NiCd, NiMH cells
2–7 LiPo, LiFe, Li-Ion cells

4.0 – 30.0V absolute maximum range

Lithium Balancing Accuracy

Lithium Balancing Connection

10mV per cell

ElectriFly compatible,
FlightPower

Lithium Max. Node Current

Maximum Rated Current

Maximum Capacity Displayed

Auto-Off

Protection Systems

180mA max.

80A instantaneous

65,000mAh (65.0Ah)

After 30 seconds of inactivity

Reverse polarity protection,
Low LiPo voltage alert
with auto-shut down

Case Size

Weight

10 0 × 65 × 25mm (3.9 × 2.6 × 1.0")

127.8g (4.5 oz.)

SPECIAL FEATURES and FUNCTIONS

®

adapters included

Battery Checker Mode recognizes the number of cells

in a pack and measures cell and pack voltages

Cell Balancer Mode balances up to 7S lithium battery

packs

Power Checker Mode can display measured power,

current, battery voltage, and used capacity while under
loads up to 80 amps instantaneous

Star Plug® male on input, Star Plug female on the

output, with built-in radio battery jack and balancing
connection

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IMPORTANT WARNINGS

Disconnect the battery from the meter immediately
if the meter or battery become hot!! Allow the meter
and battery to cool down before reconnecting.

NEVER allow water, moisture or foreign objects into the meter.

NEVER block the air intake holes or fan as this could cause the

meter to overheat.

NEVER attempt to use batteries with more cells or total voltage than
listed in the specifi cations.

NEVER attempt to pass more current/power through the meter than
listed in the specifi cations.

ALWAYS disconnect the battery from the meter when not in use.

ALWAYS keep out of reach of children.

GLOSSARY OF TERMS

Amps (A): The unit of measure for charge or discharge current.

Milli-amps (mA): A unit of measure for current, being amps (A)

multiplied by 1000 and listed as “mA”. So 2.5A is the same as 2500 mA
(2.5  1000). Or, to convert mA to amps, divide the mA number by

1000. So 25mA is the same as 0.025A (25 divided by 1000).

Capacity, milli-amp hours (mAh), and amp-hours (Ah): Charge
energy stored by a battery is called capacity, which is defi ned as
how much current a battery can supply in one hour of time. Most
hobby batteries are rated for capacity in “mAh” or milli-amp
hours. A 650mAh battery can deliver 650mA of current for one hour
(650 mA  1hr = 650 mAh). A 3200mAh battery can deliver 3200mA
(3.2A) of current for one hour (3200mA  1hr = 3200mAh), etc. Very
large batteries, such as lead-acid fi eld batteries, are usually rated in
“Ah” or amp-hours. A “12V 7A” fi eld battery can deliver 7 amps of
current for one hour (7A  1hr = 7Ah).

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INPUT POWER – CONNECTION, PROTECTIONS & LIMITATIONS

The meter draws input power
from the battery that is
connected for measurement.
The meter will automatically
enter a sleep mode if no
commands are given within
30 seconds, but note that
power will still remain active
in the meter during this time.
Simply press ENTER to re­activate the meter.

The BATTERY lead on the
left side of the meter is used
for connecting large power
batteries. Lithium packs up to
7S can be used, including LiPo
batteries rated at 25.9V, LiFe
packs up to 23.1V, and Li-Ion
packs up to 25.2V.

The RX/TX battery jack
can accept NiCd and NiMH
batteries having a nominal rating of up to 9.6V, with a universal or
Futaba® J type connector.

The PowerMatch meter can handle up to 80 amps of current
instantaneously, and measure capacity up to 65Ah (65,000mAh).
Passing more than 50 amps through the meter continuously for
over 2 minutes will cause heat to generate and cause readings to
become less accurate. Do not exceed the maximum rated current or
voltage handling capabilities of the meter.

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OUTPUT and BALANCING CONNECTIONS

The OUT connection is located on the right side of the meter, and
includes a Star Plug female connector.

A balancing connection is
located on the right side of
the meter, capable of han­dling 2S-7S lithium batter­ies. Terminal spacings are
compatible with ElectriFly
style balancing plugs. An
adapter is included for con­nection of FlightPower® and
Thunder Power™ battery
balancing plugs.

MENU STRUCTURE

The PowerMatch meter has four different operational modes:

MODE OPERATION

BATTERY CHECKER

Shows the present status of the battery.

Determines how well cells in a lithium battery

CELL BALANCER

are balanced, and balancing can be initiated
through this mode.

POWER CHECKER

USER SETTING

For measuring and storing various types of
data measured under loaded conditions.

For setting low voltage detection level
for lithium batteries.

BATTERY CHECKER MODE – LiPo, LiFe, Li-Ion BATTERIES

This mode is used to measure the present status of a lithium
battery, showing the number of cells in the battery, static battery
voltage, capacity remaining, highest cell voltage, lowest cell
voltage, gap in voltage between the highest and lowest cell, and
individual cell voltages.

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