Gate MERF 3.2 User manual

Last update on DECEMBER 22, 2016 www.gatee.eu
USER GUIDE

Notice
Safety Summary
DANGER!
FOR YOUR SAFETY
Information contained in this document is subject to updating without notice.
You should program your MERF 3.2 before the first use.
FOR YOUR OWN SAFETY, PLEASE READ THIS USER MANUAL
CAREFULLY BEFORE INSTALLING THE DEVICE
THE DEVICE COVER MUST NOT BE REMOVED BY THE USER
Caution must be exercised to prevent short circuiting the battery as the
consequences can be very dangerous.
We recommend that this product should be installed by an experienced airsoft
service.
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Please be careful, there are some fake MERF 3.2 being sold on the Internet.
They are manufactured from cheap and low quality components. Using the
fake MERF 3.2 is dangerous and may damage your gun and battery.
HOW TO RECOGNIZE A FAKE MERF 3.2?
- green soldermask
- no original box

CERTIFICATE OF CONFORMITY
The symbol shown here means that the product is classed as Electrical or Electronic Equipment
and should not be disposed with other household and commercial waste at the end of its
working life. The Waste of Electrical and Electronic Equipment (WEEE Directive 2012/19/UE)
has been put in place to recycle products using best available recovery and recycling
techniques to minimize the impact on the environment. Purchasers shall take any old electrical
equipment to waste recycling public centers or points of sale.
PRODUCT DISPOSAL INSTRUCTIONS
GATE Menet, Wojtak Sp. J. hereby declares under our sole responsibility that the product
GATE MERF 3.2 is in conformity with the essential requirements of the following Directives:
EC DIRECTIVE 2011/55/EU
This product has been certified as RoHS Compliant.
WARNING:
WARNING:
WARNING:
NOTE:
Before starting installation process, please ensure that your AEG is
empty and there are no BBs inside.
Always use a fuse between the battery and the AEG controller.
Incorrectly connecting positive and negative battery terminals will
cause immediate damage to the unit and it can lead to fire.
Please check if you have downloaded the latest manual from the Technical Support
section of our website: www.gatee.eu. The Product Warranty Form is also
available there.
In case you have any difficulties while installing or using this product, we
recommend to email us at [email protected].
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GATE Menet, Wojtak Sp. J. does not take any responsibility for damages, injuries
and accidents resulting in the use of this product or the use of Air Electric Gun
with the product installed.

Table of Contents:
Safety Summary ........................................................................................................2
Table of Contents .......................................................................................................4
01. Overview ..............................................................................................................5
• Key Functions .........................................................................................................6
• Package Contents ...................................................................................................9
02. Installation ..........................................................................................................10
• Simple ...................................................................................................................10
• Enhanced ..............................................................................................................10
03. Set up your MERF 3.2 ....................................................................................12
04. Menus ................................................................................................................14
• Sub-Menus ...........................................................................................................15
• Factory Settings ....................................................................................................17
05. Burst Time setting .............................................................................................17
06. GATE Limited Warranty Policy ..........................................................................20
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01. Overview
Multifunctional programmable 3rd generation MOSFET. The AEG controller has 11
functions. Its latest feature is the 3-rd Burst Mode, which allows for limiting the
number of shots. MERF 3.2 allows for lossless rate of fire adjustment. It protects
Li-Ion batteries: LiPoly and LiFePO4. It has a built-in active brake and it protects
contacts against damage. The Smart Trigger function enables achieving faster
trigger response. Thanks to two operating modes, the system works with both the
original and the modified AEG installation. The system is designed for all replicas
and especially for the upgraded ones. It has been adapted to work even with the
most powerful springs, including M170.
Main Functions Features
• MOSFET
• Active Brake
• Electronic Fuse
• Battery Protection
• Over temperature protection
• Debouncing
rd
• 3 Gen MOSFET
• ROF Control
• Smart Trigger
• 3-rd Burst
• Plug&Play
•
range of voltages 3.2 - 15V
• Compatibility with the strongest AEG
replicas
• Simple installation
• Protections
• Very low current consumption in
stand-by (0.15mA)
• Very low resistance ~2,4mΩ
• Compatible with all types of GearBox
• 4 LED Display
• DEANS-T Connectors
The system works correctly in a wide
Operating Limits Absolute Maximum Ratings
Battery Voltage
Battery Type
Spring
7.2 - 12.8V
NiCd, NiMH, Li-ion,
Li-Poly, LiFePO4
M170, M210
Supply Voltage
Maximum continuous current
Maximum current (3 min)
Resistance
3.2 - 15V
35A
50A
2.4mΩ
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Key Functions
Do you want to achieve higher rate of fire and faster trigger response?
Are you planning power upgrade of your rifle? In that case, you need
a MOSFET.
It targets the energy from the battery directly to the motor, bypassing
the mechanical trigger contacts. As a result, you gain a higher rate
of fire of the rifle and faster trigger response, and the contacts
are protected against burn out.
MOSFET
Do you care about realism? Would you like to increase the life of the
gearbox? Does your rifle have such high rate of fire that you are not
able to make a single shot? Active brake sorts things out.
In SEMI Mode, the brake does not allow for compressing a piston after
a shot. The piston will stop in front position which eliminates
unnecessary stresses, increasing the service life of gearbox and
its parts. It is very important, especially with an AEG power upgrade.
After releasing the trigger, the rifle immediately stops firing. Thus, you
gain more realism and, additionally, you do not waste your precious
ammunition.
Active Brake
We know how important reliability is on the battlefield. That’s why our
new MOSFET has thermal protection. In tandem with a time-lag fuse,
it fully protects your AEG installation.
Electronic Fuse
Modern LiPoly batteries are very sensitive to over-discharge. If you do
not want to damage the battery and you care about its service life, this
protection is indispensable. The microprocessor constantly monitors
the battery voltage. When it drops down to a critical level, it will not
permit firing.
Protection against Over-Discharge of Battery (UVP Protection)
This provides full compatibility with the micro-switches. It is fully
resistant to contact bounce. You gain a bigger ROF, a faster trigger
response and your MOSFET is less prone to heating.
Debouncing (Digital Interface)
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It enables lossless reduction of rifle’s rate of fire, so you can use
stronger LiPo batteries, and still have ROF just like in a real gun.
Rate Of Fire Control
We know how vital the fast trigger response is during combat. Victory
is often a matter of fractions of seconds. This is why we have
developed the Smart Trigger function. This function enables you
to achieve faster trigger response.
It works with the ROF Control system. During the first shot, the
microprocessor sets ROF Control to 100%. After the first shot, it is
switched to the previously programmed value, e.g. 30%. As
a consequence, the first shot is fired with full rate of fire,
and subsequent ones with a reduced ROF. The best results can be
achieved by using a battery with higher voltage than a standard one.
For example, if we use a 7.4V battery, we can change it to 11.1V. In this
way, we will achieve faster trigger response with the same rate of fire
as with a standard battery.
Smart Trigger
Burst mode enables you to make 3-shot series. In this way you can
save ammunition and increase the realism. You can change AUTO
mode to BURST mode or SEMI* mode to BURST mode.
If in SAFE/SEMI/BURST mode you release the trigger earlier, you can
make one or two shots. The burst time is set in the menu with accuracy
to 4ms. The processor actively compensates for the change in burst
time with a decrease in the rate of fire due to battery discharging.
*SEMI to BURST in enhanced mode only
3-rd burst mode
The usage of modern transistors and microcontroller has enabled us
to create the smallest and most reliable AEG Controller in the market.
3rd Generation MOSFET
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You can connect the system to a rifle in two ways. Depending on the
selected method, you should set a proper operating mode: Plug&Play
or Enhanced
Plug&Play: All you need to do is connect the system between
the battery and the rifle.
Enhanced Mode: It requires modification of AEG installation.
Connect trigger contacts to MERF 3.2. You can do it using the
signal wire attached to the kit.
Operating Modes
The function gives you the option to program your fire selector.
There are five modes:
- STOCK WIRING SEMI/AUTO
- STOCK WIRING SEMI/BURST
- MODIFIED WIRING SEMI/AUTO
- MODIFIED WIRING SEMI/BURST
- MODIFIED WIRING BURST/AUTO
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Included in the kit:
MERF 3.2
Additional kit of Deans-T Connectors
Double signal wire for trigger contacts
Single signal wire for trigger contacts
Programming button
01
02 03
04
05
01
02
03
04
05
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02. Installation
Thanks to two operating modes, MERF 3.2 works with both standard and
modified installation.
1. Simple installation (no modification to your AEG is required):
Connect MERF 3.2 between the battery and the AEG. You can make configuration
using programming button from the kit.
2. Enhanced installation:
To adapt the standard AEG installation to work with MERF 3.2 you have to get to
the trigger contacts. In case of GB v2 contacts are located inside a gearbox. With a
version 3 gearbox, installation is easier because the contacts are on the outside of
the gearbox. Please consult a local airsoft technician if you have never
disassembled a gearbox before or if you have any installation concerns.
a) Installation of MERF 3.2 without replacement of wires .
Using this method, the original wiring is kept, and the connections are modified.
Referencing Figure 2, de-solder A wire from the one of the trigger contacts and then
solder it to the B wire. It does not matter which wire you disconnect from the trigger
Fig 1. Standard AEG installation
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BATTERY
7.2 - 12.8V
AEG Motor
A B
CONTACTS
FUSE