Revolectrix GT500 User manual

GT500
Multi Chemistry Charger
MANUAL
© Copyright 2015
Rev2.2

Contents
About GT500......................................................................................................................... 3
Specifications....................................................................................................................... 5
Precautions .......................................................................................................................... 6
Smart Power Management .................................................................................................. 7
Regenerative Discharge...................................................................................................... 8
Power supplies..................................................................................................................... 9
Firmware Update................................................................................................................ 10
Connecting Packs.............................................................................................................. 11
General info................................................................................................................................................... 11
Single Pack Balanced LiPo Charge/Discharge.......................................................................................... 12
Single Pack Unbalanced Charge/Discharge .............................................................................................. 12
Parallel Charge.............................................................................................................................................. 13
Example 1: Configuring Smart Power Management....................................................... 14
Example 2: Charging a LiPo pack .................................................................................... 16
Example 3: Saving and Loading a User Preset ............................................................... 19
Charging tips...................................................................................................................... 21
General information...................................................................................................................................... 21
Charging packs............................................................................................................................................. 21
Internal Resistance....................................................................................................................................... 22
Menu Options..................................................................................................................... 23
Basic Settings –Charge............................................................................................................................... 23
Basic Settings –Discharge.......................................................................................................................... 23
Basic Settings - Store................................................................................................................................... 23
Basic Settings - Cycle .................................................................................................................................. 23
Basic Settings - Monitor............................................................................................................................... 23
Advanced Settings –Cycle Settings........................................................................................................... 24
Advanced Settings –Charge Termination ................................................................................................. 24
Advanced Settings –Discharge Termination ............................................................................................ 24
Advanced Settings –Discharge Profile...................................................................................................... 24
Advanced Settings –Charge Balance ........................................................................................................ 24
Advanced Settings –Discharge Balance ................................................................................................... 24
Advanced Settings –Charge Timeout........................................................................................................ 25
Advanced Settings –Discharge Timeout................................................................................................... 25
Advanced Settings –Trickle Settings......................................................................................................... 25
Advanced Settings –Float Settings............................................................................................................ 25
Advanced Settings –Unbalanced Charge.................................................................................................. 25
Advanced Settings –Unbalanced Discharge............................................................................................. 25
Settings - Supply Settings ........................................................................................................................... 25
Settings - Audio Settings ............................................................................................................................. 26
Settings - Visual Settings............................................................................................................................. 26
Settings - Reset Settings.............................................................................................................................. 27
Troubleshooting................................................................................................................. 28
Support options ................................................................................................................. 30
REVOLECTRIX limited warranty....................................................................................... 31
Limits and Exclusions.................................................................................................................................. 31

About GT500
Description:
Model GT500 for use with LiPo, LiIon, LiPoHV, LiFePO4 (or A123), NiCd, NiMH, and Pb
(Lead Acid) battery packs
Features
Selectable charge rates range from 25mA to 20A
Continuous maximum output power rating, 500W @ +24VDC input voltage, 250W @
+12VDC input voltage
Native support of JST XH balance connectors allows direct connection of 1s-8s LiPo/LiHV
Batteries without requiring any adapters. Also supports Revolectrix SPA and MPA Safe
Parallel Adapters; the industry's safest methods for parallel charging multiple, same-cell-
count packs. These items are peripheral products, available separately or as part of Combo
packages, not included as a part of the basic GT500 unit
Smart Power Management allows customer to select between programmable input power
sources. Available settings include power supply input current limit, input low voltage limit,
regenerative discharge rate and voltage limit. GT500 stores 1 set-up for Power Supply and
1 set-up for Battery and can be programmed to ask for verification one time on start-up
GT500 supports charging through the main discharge wires only for certain scenarios (see
features tab for full details). For balanced charging, the unit requires balance wires in
combination with the discharge wires (charge rate support up to 20A max)
Initiate charge, discharge, store, monitor, and multiple cycles at the GT500
The unit comes equipped with basic presets for all battery chemistries currently available as
well as 28 EMPTY user preset positions. During the course of operation, any changes that
are made at the charger may be named and saved ("SAVE AS") or saved over ("SAVE") to
the user presets bank. The process is analogous to opening a document in a PC
application, making changes, and then using the "Save" or "Save As" menu options from
the PC application to store the unique setup parameters chosen during the course of using
the charger for its intended purpose; charging and managing your batteries. Best of all,
everything happens at the charger, which makes it ideal for taking it on the road
0.1mohm resolution allows accurate four point internal resistance measurement of each cell
Environmentally friendly, regenerative discharge capability of up to 500W. Unlike traditional
methods of discharge, which deplete the output battery's energy in the form of heat across a
transistor, regenerative discharge takes most of that energy and puts it back into the input
battery. In other words, when you discharge your LiPo for storage, you will be re-charging
your Lead Acid input battery. The total amount of power that you can achieve is limited only
by the amount of current that your input battery can accept, or 500W, whichever is lower
GT500 is also equipped with a traditional, 50W internal discharge capability which is non-
regenerative
Large cooling fan
Massive over-sized internal heat sink
12AWG silicon input power cable terminating in an EC-5 female pin connector. A plier clip
assembly with EC-5 on one end and red/black plier clips on the other is available as an
accessory item

Massive sendust core toroid capable of 25A continuous input current requirement for
maximum output specifications
Other Features
2.6", 128 x 64 pixels graphic LCD with white LED backlight
Embedded PC USB support and free PC Software
Intuitive Navigation Wheel with inclusive push button SELECT/ENTER, plus a BACK button
makes Navigating menus and making selections a joy!
Sleek and attractive high-impact ABS enclosure for maximum airflow efficiency
Sturdy Aluminum top panel
Quick "preset over-ride access" to common charging parameters like setting charge and
discharge current and operational modes of charge / discharge / monitor / cycle(s)
Additional advanced options menu for adjusting in-depth charging parameters and global
options at the unit
Free and reliable firmware updates for the life of the product using the free, downloadable,
Windows-based Firmware Update Utility (Application)
Programmable options allow speaker ON/OFF or volume, selectable completion notification,
information scrolling, Logo display duration at power up and Navigation Wheel direction
control
Multiple product cases can be interlocked
Please note: all specifications and features listed above subject to change without notice

Specifications
For Battery types: Lithium Polymer HV (1s to 8s balanced, 1s to 2s unbalanced), Lithium
Polymer (1s to 8s balanced, 1s to 2s unbalanced) Lithium Ion (1s to 8s balanced, 1s to 2s
unbalanced), Lithium Manganese (1s to 8s balanced, 1s to 2s unbalanced), A123 (LiFePO4)
(1s to 8s balanced, 1s to 8s unbalanced), NiCd (1s to 21s), NiMH (1s to 21s), Lead Acid
batteries (1s-12s Flooded, Gel, AGM, SLA)
Pack capacity: 50 mAh to 360Ah
Input voltage: 10-32VDC, reverse polarity protected
Input current: 1A to 25A, software limited
Power conversion: Synchronous DC/DC converter, 85% to 93% efficiency depending on
output current
Output battery charge current: Adjustable range 25mA to 20A, limited by 25A input current*
Output battery discharge current: Internal discharge 25mA to 8A, 50W max Regenerative
discharge 25mA to 20A, 500W max
Continuous max output power: 250W @ +12VDC input, 500W @ +24VDC
Cell balancing: 1s-8s Li or A123 (LiFePO4) balanced charging
Voltage calibration: Cell voltage measurements are factory calibrated to a standard traceable
to NIST; calibration is to +/- 6 mV
Current calibration: Charge current is factory calibrated on a 4A standard; calibration is to +/-
1mA
Measurement accuracy:
Voltage resolution: 78uV (16 bit)
Voltage tolerance: +/- 6mV
Charge current: +/- 1%
Capacity added to pack: +/- 1%
Percent capacity (“Fuel”): +/- 5% (with accurate fuel table defined for battery being charged)
Interface: USB 2.0 Full Speed (12Mb/s)
Cooling fans: Single, 13 CFM, 50mm diameter
Heat sink: Internal 120W aluminum, thin finned
Output battery connector: Modified JST XH series, 9 position max; accepts 1s-8s balance
plugs on batteries
LCD: 2.6", 128 x 64 pixels graphic LCD with white LED backlight
Size: 5.70" x 5.57" x 3.40"
Footnotes:
* Please note, for safety reasons, available charger current may be limited for certain battery
types and/or charging modes, e.g., non-balanced charge of Li

Precautions
Follow all instructions in this manual to ensure safe operation.
IMPORTANT: Do not disconnect or connect packs while the charger is charging.
Always watch LiPo packs while they are charging. Never leave LiPo packs unsupervised
during charging
See additional warning sheets provided with your battery packs.
Follow all guidelines for charging, discharging, handling and storing LiPo cells.
Minor arcing may occur when discharge wires are connected to the charger before
charging. This is normal.

Smart Power Management
Because the GT500 is capable of high power output, it is strongly recommended that you
configure Smart Power Management before you use the GT500 for the first time, and select the
power source in use any time it is changed.
The GT500 stores six Smart Power Management profiles: three for DC power supplies (PSU1,
PSU2, PSU3) and three for Lead Acid batteries (Batt1, Batt2, Batt3). When you first apply
power to the GT500, the first thing you do is select the profile that matches the power source
you are using. This makes it easy to change the Smart Power Management profile from a DC
power supply at home to a Lead Acid battery at the field.
If you don’t configure Smart Power Management to match your power source(s), these are the
default settings:
PSU1
PSU2
PSU3
Batt1
Batt2
Batt3
Voltage lower limit
10.0V
15.0V
10.0V
11.0V
22.0V
11.5V
Current upper limit
25A
25A
5A
25A
25A
25A
Regenerative discharge
Not
Available
Not
Available
Not
Available
Enabled
Enabled
Enabled
Regenerative voltage upper
limit into Lead Acid battery
Not
Available
Not
Available
Not
Available
14.4V
28.8V
14.4V
Regenerative current upper
limit into Lead Acid battery
Not
Available
Not
Available
Not
Available
10A
10A
10A
IMPORTANT: To prevent damage to the power source, you must
specify the power source’s operating characteristics before charging
for the first time with a DC power supply, and before charging for the
first time from a battery. The GT500 allows you to store up to 6
different power supply profiles (3x DC power supply profiles and 3x
Lead Acid battery profiles). After that, load the power supply profile
using the Power Source option any time you change to a different DC
power supply or battery. See Example 1: Configuring Smart Power
Management on how to configure Smart Power Management for both
a DC power supply and a Lead Acid battery.

Regenerative Discharge
Regenerative discharge routes most of the energy from the pack being discharged back
into the Lead Acid battery powering the GT500. This feature is only available when the
GT500 is powered from a Lead Acid battery. Regenerative discharge supports up to
20A, 500W maximum.
Regenerative discharge
Enable/disable regenerative discharge at the GT500 via Smart Power Management
for the supply battery.
GT500 automatically determines whether it is connected to a Lead Acid battery or a DC
power supply. If it detects a power supply, it switches to internal discharge (10mA to 8A,
50W maximum).

Power supplies
GT500 is one of the highest power RC battery maintenance devices available. Running
full power, it can deliver 500W to batteries during charge. To achieve this, even on an 8
cell Lithium battery, it must boost the input voltage. This means the GT500 may draw up
to 600W from the input power supply.
To take advantage of GT500’s full power capability, the power source should be 24V DC
(higher voltage does not improve output power), and capable of delivering a minimum of
25A to GT500’s input.
If you don’t need GT500’s full output power, it can operate from much lower power
sources. Use the steps outlined in Example 1: Configuring Smart Power Management to
configure GT500 to never exceed the maximum capabilities of your input source(s),
whether DC power supply or Lead Acid battery.
Important: Unstable power supplies can damage the charger. To help
reduce risk to the charger observe the following:
1) When powering more than one Charger/Battery Workstation from the
same supply, ensure that all connected chargers are idle (not charging)
when connecting the second or third charger. Alternatively, connect all
chargers to the supply before the supply is powered up.
2) When powering the Charger/Battery Workstation from an automotive
battery (Lead Acid) installed in a vehicle, do not start or stop the vehicle’s
engine unless the charger is idle, or disconnected from the automotive
battery (Lead Acid).
3) When powering any Revolectrix Charger or BatteryWorkstation using
the E-Fuel 1200W/50A power supply:
i) first connect the Power Supply to AC power BEFORE connecting the
charger to the Power Supply.
ii) set the voltage on the Power Supply so it is within the operating range
of the Charger or Battery Workstation you will be powering.
iii) wait at least 15 seconds.
iv) then connect the Charger or Battery Workstation to the Power
Supply.
v) conversely, disconnect the Charger or Battery Workstation from the
Power Supply BEFORE disconnecting the Power Supply from AC
power.

Firmware Update
The free GT500 PC software gives you the ability to update to the latest firmware via a USB
cable. You can download the GT500 PC software at
http://www.revolectrix.com/downloads.htm
Refer to the GT500 PC software for firmware update instructions.

Connecting Packs
General info
When balance charging, both a balance connector and the main discharge wires must be
connected.
When performing a non-balance charge on a LiPo, LiFePO4 (or A123), NiCd, NiMH, or
Lead Acid pack, connect only the pack’s main discharge wires to the two outer banana
jacks of the charger.
Pack discharge wires are usually not terminated in banana plugs (e.g., they might be
terminated in a Deans connector). For convenience in connecting to the charger, prepare
an adapter cable with banana plugs on the charger end and a connector that mates with the
pack’s discharge connector on the other end.
The GT500 balance port accepts direct connection of a universal JST-XH balance
connector up to 9-pins, supporting packs up to 8s. To connect a pack lower than 8s, align
the connector to the right as shown. The negative pin of the battery pack balance connector
(usually identified by a black wire) must be connected to the ground of the charger balance
port (identified by an arrow or “GND”) in all cases.
The GT500 does not support balance-wire-only charging.
Note: After a charge is initiated, never alter the connections between
the charger and the battery packs. Always end the current charge
session before making any connection changes. See page 25 for
more information about STARTING and STOPPING charge sessions.
WARNING: Failure to comply with the above could result in fire and/or
damage not covered by warranty!
CAUTION: When using the banana plug adapter cables described
above, ALWAYS insert the banana plugs into the charger BEFORE
connecting the adapter cable to the pack. Reverse the sequence
when disconnecting the pack. This will prevent the live banana plugs
from touching each other, which would create a dangerous condition
and could seriously damage the pack.

Single Pack Balanced LiPo Charge/Discharge
Single Pack Unbalanced Charge/Discharge
Note: Best practice is to connect balance connector first, then connect
discharge wires.

Parallel Charge

Example 1: Configuring Smart Power Management
1. This example will show you how to configure a 12V DC power supply and a
12V Lead Acid battery for GT500 for the first time. Although we use a 12V DC
power supply in this example, any input source may also be used.
2. Connect GT500 to a 12V DC power supply. The Revolectrix logo screen will
be displayed with the firmware version number displayed at the bottom right.
3. If the Logo Display option in CHEMISTRY/SETTINGS -> SETTINGS ->
VISUAL SETTINGS is ON (default), the Revolectrix logo will remain displayed
until you press any button or scroll the navigation wheel. Press any button to
go to the next step.
4. If the Pwr On Default option in CHEMISTRY/SETTINGS -> SETTINGS ->
SUPPLY SETTINGS is SELECT (default), the SELECT POWER SUPPLY
menu appears.
5. Since Smart Power Management is not set up yet, scroll the navigation wheel
to PSU1 12v 25 Amps and press ENTER.
6. The CHEMISTRY/SETTINGS menu should appear next. If this is not the first
time you are using the GT500, you may not get the CHEMISTRY/SETTINGS
menu to appear. In this case, press BACK repeatedly until you reach the
CHEMISTRY/SETTINGS menu. Then scroll to Settings and press ENTER.
7. In SETTINGS menu, scroll to Supply Settings and press ENTER.
8. In the SUPPLY SETTINGS menu, under the Power Source option, you will
see the setting is at PSU1 which is the source you have selected in step 5
above. This shows that PSU1 settings are used by GT500 for power
management.
9. The other options in this screen show the settings for PSU1. Refer to Menu
Options - Supply Settings on how to set each of the options. If you wish to
change them, scroll the navigation wheel to highlight the option you wish to
change and press ENTER. The highlight will change from the option to the
setting and you can use the navigation wheel again to scroll through the
settings available. To save the new setting, press ENTER or to discard your
changes, press BACK.
10. Once you are satisfied with PSU1 settings, scroll to the Power Source option
and press ENTER to change the power source.
11. Scroll to Batt1 and press ENTER. The screen will now update to show the
settings for Batt1.
12. Once the Batt1 settings have been set, you can redo step 10 and 11 again to
configure the other power source settings for all the input sources that you
Tip: Once you have configured Smart Power Management, you may
wish to rename the input source names. To do this, use the Edit
Supply Name option in the SELECT POWER SUPPLY menu. Refer
to Example 3: Saving and Loading a User Preset on how to edit
names.
Tip: Use the Menu Dir Inv option in CHEMISTRY/SETTINGS ->
SETTINGS -> VISUAL SETTINGS to change the direction of the
highlight movement when you use the navigation wheel. This option
only applies to menu navigation.

have. After you have configured all the power source settings, you only need
to change the Power Source option to select the right input source each time
you power up with a different input source. The GT500 will then load the correct
settings for Smart Power management.
13. Scroll to the Power Source option and change the source back to PSU1.
14. Press and hold the BACK button to return to the CHEMISTRY/SETTINGS
menu.
Note: After you have changed the settings in any of the six input
source profiles, remember to use the Power Source option to load the
Smart Power Management settings for the input source you are
currently using.
Tip: If you change input source frequently, you may want to leave the
Pwr On Default option to Select so that each time GT500 is powered
up, you will be prompted with the SELECT POWER SUPPLY menu to
select a power source. Alternatively, if you use one input source most
of the time, you can change the Pwr On Default option to point to the
correct input source. GT500 then defaults to the input source you have
chosen without showing the SELECT POWER SUPPLY menu. If you
chose this method, you can still change the input source via the
CHEMISTRY/SETTINGS -> SETTINGS -> SUPPLY SETTINGS menu.

Example 2: Charging a LiPo pack
1. Connect GT500 to a 10–32V DC power supply or 12–28.8V battery. When
powered on, the Revolectrix logo screen will display briefly or remain on
indefinitely depending on the Logo Display option setting defined in
CHEMISTRY/SETTINGS -> SETTINGS -> VISUAL SETTINGS. If the logo has
not been set to On, skip to step 3.
2. Press any button or turn the navigation wheel to exit the Revolectrix logo
screen.
3. If the Pwr On Default option has not been set to Select, skip to step 4.
Otherwise, the SELECT POWER SUPPLY menu will appear. Then:
a. Turn the navigation wheel to select one of the power source that matches
the power supply you’re using.
b. Press ENTER.
4. If you are using GT500 for the first time, the CHEMISTRY/SETTINGS menu
will appear next.
5. Connect the LiPo pack to GT500:
a. Connect the balance connector of the LiPo pack to GT500. (See
Connecting Packs for details.)
b. Connect the banana jack cable between the pack/battery and the GT500.
6. In the CHEMISTRY/SETTINGS menu:
a. Use the navigation wheel to scroll to the Lithium-Po/FePO4 option if it’s
not already highlighted. This option in general applies to all Lithium
battery chemistries available.
b. Press ENTER.
7. In the next screen, the header displays LITHIUM-PO/FEPO4 to indicate you
have selected this chemistry. Use the navigation wheel to scroll to Charge
mode if it’s not already highlighted and press ENTER.
8. In the next screen, the header displays LI-PO/FEPO4-CHARGE to indicate the
battery chemistry and the operating mode you have selected above. The next
few lines display the basic settings/options applicable to the LiPo charge
operation.
Tip: The following detailed instructions for charging a LiPo pack will
help you learn how to navigate through the charging process. Once
you become familiar with GT500 operations, you shouldn’t need
instructions at all.
IMPORTANT: To prevent damage to the power source, you must
specify the power source’s operating characteristics before charging
for the first time with a DC power supply, and before charging for the
first time from a battery. The GT500 allows you to store up to 6
different power supply profiles (3x DC power supply profiles and 3x
Lead Acid battery profiles). After that, load the power supply profile
using the Power Source option any time you change to a different DC
power supply or battery.

a. The Cell Type option allows you to switch between LiPo and LiFePO4
(or A123).
b. The Charge Amps option allows you to adjust the current for charging
the LiPo pack. The allowable range is 25mA to 20A.
c. The Chg V/cell option sets the cell end voltage of the LiPo pack.
d. Selecting Advanced Settings brings up another set of menus that
allows you to adjust more detailed settings applicable for the battery
chemistry or operating mode.
e. The Save or Save As option allows you to save the settings you have
changed to one of 28 available User Presets that you may load at any
time. See Example 2: Saving and Loading a User Preset on how to save
or load a user preset.
f. Start will allow you to start the charge operation.
9. Scroll to Advanced Settings and press ENTER. The screen now shows a few
group of advanced settings available for LiPo Charge.
10. Scroll to Charge Termination and Press ENTER. You now see all the options
applicable for LiPo charge termination.
11. Scroll to the CV Timeout option and adjust the setting at 1hr. Press ENTER to
save the setting.
12. If you would like to change an advanced setting from another advanced
settings group, press BACK to see the list and select another group. Otherwise
scroll to Continue and press ENTER. This brings you back to the LI-
PO/FEPO4-CHARGE menu with Start highlighted. Press ENTER to start the
charge operation.
13. GT500 checks the battery and cell voltages and displays the number of cell
count and battery chemistry. If the display matches the pack’s chemistry and
cell count, press ENTER to start charging. If the display does not match the
pack’s chemistry and cell count, press BACK or do nothing –if you do nothing,
the screen will time out with a series of error beeps and go back to the previous
screen.
14. During the charge operation, use the navigation wheel to scroll through and
view the status information. Throughout the charge operation, the battery
chemistry, cell count and current setting will be displayed at the top together
Tip: The Cell Type is one of several options where its setting could be
adjusted by the user. Option settings are always displayed to the right
of the option and pressing ENTER changes the highlight from the
option to the setting. Once the setting is highlighted, use the navigation
wheel to scroll through the available settings and press ENTER again
to save the setting. The highlight will go back to the option and the
setting will display what you have just selected. While scrolling through
a setting, if you decide to discard your changes and leave the setting in
its original value, press the BACK button. Once a setting has been
changed, it is saved to memory. When the charger is disconnected
from the power source and then powered up again, the last saved
settings will be displayed.
Tip: There are a total of 8 cell types (LiPo or LiIon, LiFEPO4 or A123,
LiHV427, LiHV435, NiCd, NiMH, PbSLA and PbAGM) supported in
GT500. Each of the cell types have their own settings saved in GT500.
Changing the Cell Type option will call up its settings and the display
will be updated to show the saved settings applicable to that cell type.

with the time status information.
15. To change the current setting, press ENTER. The current setting you have
previously set in the CHARGE AMPS option will be highlighted and you can
adjust the setting if desired. Press ENTER again to set a new charging current
or press BACK to discard any changes.
16. To stop the operation, press and hold BACK. The charger stops charging and
STOP is displayed at the top right of the screen. Press any button to return to
the LI-PO/FEPO4-CHARGE screen.
17. If you allow the operation to complete, GT500 will beep several times and the
display will show DONE at the top right of the screen. Use the navigation wheel
to scroll through and review the status information. Press any button to return
to the LI-PO/FEPO4-CHARGE screen.
18. Disconnect the LiPo pack from GT500.
Tip: You can use the Info Scroll Time option in
CHEMISTRY/SETTINGS -> SETTINGS -> VISUAL SETTINGS to
auto-scroll through the status information.
Note: NiMH, NiCd and Lead Acid user presets may switch to trickle
charge (depending on how the preset is configured) when charging is
complete.
Note: The operation is now complete, but the “session” remains open
so you can review the status information. Once you press any button,
the status information will be discarded. If you disconnect the pack
before ending the session, GT500 will display a “Pack Removed”
message. This is a non-critical message, and you can ignore it in this
situation.
Note: After a Charge/Discharge/Regenerative Discharge operation is
complete, the fan will continue operating for another few minutes to
allow the internal temperature to cool down faster.

Example 3: Saving and Loading a User Preset
1. After changing settings, you can save them to 1 of 28 available User Presets
so that you may recall or load them at another time when you want to use those
settings. This example shows you how to save your settings to a blank preset.
To save your settings, you must be at a menu that has the SAVE and SAVE
AS options at the bottom of the screen. Follow step 1 to 8 in Example 1:
Charging a LiPo Pack to get to a menu with the SAVE and SAVE AS options.
2. After you have changed your settings, including any advanced settings, scroll
to SAVE AS and press ENTER.
3. The SAVE AS USER PRESET menu appears for you to select 1 out of 28 user
presets. Scroll to the first preset or any blank preset you wish to save to and
press ENTER.
4. The SAVE AS USER PRESET menu is replaced by an editing screen. On the
second line below the SAVE AS USER PRESET header is a blank line where
your user preset name will appear as you type. The first character in the user
preset name is highlighted to show that it is ready to be changed. Below the
user preset name is a series of character and symbols that you can use for the
user preset name. Scroll through the available characters and symbols and
press ENTER to select that character/symbol. The next character in the user
preset name becomes highlighted for you to change.
5. If you wish to discard the name you have just typed, press and hold BACK.
Otherwise, if you have finished typing in the user preset name, press and hold
ENTER to save the name.
6. After saving the user preset, the menu in step 2 above appears. In order to see
the name you have just typed, press BACK to go to the LOAD USER PRESET
menu. Alternatively, the LOAD USER PRESET menu is accessible via
CHEMISTRY/SETTINGS -> LOAD USER PRESET.
Tip: The difference between Save and Save As lies in the editing of
the user preset name. Save recalls the name of the user preset you
have selected to write to and you can change none or any characters
of the old name if you wish. Save As starts with a blank line for you to
type in a new name.
Tip: Instead of pressing ENTER, pressing BACK when editing a name
highlights the previous character to change. Pressing ENTER when
the last character in the name is highlighted moves the highlight back
to the first character. These shortcuts will help you to edit names
faster.
Note: In GT500, Supply names and User Preset names supports up to
16 characters maximum.

7. At any time, you can load one of your user presets by accessing the
CHEMISTRY/SETTINGS -> LOAD USER PRESET menu.
Note: Notice in step 6 above that pressing BACK brings you to the
LOAD USER PRESET menu instead of the menu where you are
presented with one of the operating modes (ie. Charge, Discharge,
Store, Cycle or Monitor). This is a characteristic of Revolectrix
chargers where the powerful and intuitive features of a User Preset
based menu interface may be experienced. In GT500, after loading or
saving a preset, the LOAD USER PRESET menu becomes the main
menu instead of the CHEMISTRY/SETTINGS menu. However, you
can still access the CHEMISTRY/SETTINGS menu by press BACK at
the LOAD USER PRESET menu. The CHEMISTRY/SETTINGS menu
then becomes the main menu again.