Charge Power Dissipation Limit; Setting Up A Charge Cycle - Competition Electronics Turbo35-GFX User Manual

The main display for the charge mode will show you the currently selected setup, the
pack voltage, the charge rate, the mAHrs delivered to the battery, the elapsed seconds
since the start of the charge cycle, the number of peaks set, the charge current setpoint,
and the status of the Long Lockout and TurboFlex features.

Charge Power Dissipation Limit

The T35-GFX will limit the maximum power dissipated within the charge output power
MOSFETs to 185 watts.
As the charge cycle progresses, the output voltage will rise in order to maintain the
setpoint current, because the pack voltage naturally rises. If the T35-GFX sees that the
charge power MOSFETs have begun to dissipate power in excess of 185 watts, the T35-
GFX will lower the voltage to bring power dissipation within safe limits. That means that
the output voltage will be limited to the maximum safe value, and the charge current will
drop below the setpoint.
When power limiting is in effect, the display will indicate this by displaying the message
"POWER*LIMIT*ACTIVE".
The power limit feature cannot be defeated, but in some cases you may be able to bring
the T35-GFX out of power limit mode by reducing the power supply input voltage. Do
not lower the input voltage below 12 volts.

Setting up a charge cycle

As mentioned earlier on this manual, there are 10 stored setups in the T35-GFX. You
may find that one of these setups is ideal. You may also find that one of the stored setups
is a good starting point. You can load one of the setups as detailed in "Storing and Saving
Setups," below. Otherwise, you can check and set each parameter.
To navigate to the charge screen, press the MODE button until "chg mode" appears in the
upper right hand corner of the display.
If you want accurate numbers from your charge cycle, you must use the smaller voltage
sensing leads. However, if you just want to charge, use of the sense leads for the charge
cycle is unnecessary. The peak dropback voltage will still be accurate; it will just be
offset by the voltage drop of the pack connections.
Charge Rate
Charge rate is the current delivered to the pack during the charge cycle. Units are in
amps. This is how you get power into the pack. To set the charge rate, use the PAGE
button to advance to the page "peak 1". The page appears with the CURSOR positioned
to the first parameter, which is the "Chg Amps". Rotate the ROTARY DIAL SWITCH
clockwise to increase the charge current; counterclockwise to decrease the charge current.
The values will cease to change when you reach the built in limits for the parameter.
Make sure that your power supply is capable of supplying the current you select plus a bit
more; the T35-GFX cannot make power out of nothing! Your DC supply must have
sufficient power for the demand.
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