VENOM Smart Temp Fail Safe Instructions

Venom Smart Temp / Fail Safe Instructions

Venom Smart Temp / Fail Safe Instructions

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Thank you for purchasing the Venom Smart Temp (VST). These instructions will help you navigate through the many
features of this advanced on-board monitoring system. Please take a minute and read through these instructions to
familiarize yourself with the Venom Smart Temp before installing and using it. A few minutes up front will make the installation
and programming easier to understand.

1. Getting to know your Venom Smart Temp / Fail Safe

Features:

• Current Engine Temp with Peak Temp Recall

• Overheat Fail Safe with Programmable Throttle Limiter

• Digital Volt Meter with Low Voltage Fail Safe

• Radio Fail Safe with Automatic Braking.

The smart temp is designed for 4.8 to 6.0 volt radio systems and
temperatures ranging between 122º-392ºF (50º-200ºC). Using
higher voltages and temperatures may damage the module and
void the manufacturer’s warranty.

MAX/UP

Press to see maximum temperature recorded
when in the main screen or to increase a value
during setup modes.

DOWN/ ºC/ ºF

Press to decrease a value during setup modes
or use to select between Celsius and Fahrenheit
temperature readings when in the main screen

.

SET

Press to scroll through setup screens and
sub menus.

Temperature Probe Loop

Engine Head

Note: For best results,
make sure the probe
loop is as close to the
bottom of the head as
possible and the red
portion is 90º-180º
away from the exhaust
port.

Probe Loop End

Crankcase

Red

From Throttle Servo

Negative (-)

Positive (+)

Signal (s)

To Receiver

021 c6.5v 070 f

2. Main Screen

The Main Screen switches every 5 seconds between Voltage and Temp Readings. To switch the Temp Reading from Celsius to
Fahrenheit and back, press the Down/ ºC/ ºF once when the Temp screen is displayed.

Note: When using the Venom Smart Temp, always turn the
transmitter on first, then the receiver.

5 seconds DOWN/ ºC / ºF

3. Overheat Fail Safe (First Menu Screen)

The Venom Overheat Fail Safe is the best way to protect your nitro engine from serious damage that can occur when a nitro
engine overheats. Once the overheat temp is set, the VST will constantly monitor your engine temperature. In the event
the temperature exceeds the set temp, the VST will engage the Overheat Fail Safe and limit the percentage of throttle
available until the engine temperature drops 5º C (9º F) or more below the set point. After the temp drops below the set point,
the Overheat Fail Safe Mode will automatically disengage and return the model to its full operating potential.

Racers Note: The VST is a great tuning aid for monitoring peak temperatures during race prep and track testing but
the feature can be turned off for racing if desired (See Step 5).

• To access the Temperature Fail Safe Screen, press the SET button once.

• The Fail Safe temperature can be set in 5º C increments from 50-200 ºC or 9º F increments

SET

392 f

SET SET

from 122-392º F.

NOTE! REFER TO YOUR ENGINE MANUAL FOR RECOMMENDED SAFE OPERATING
TEMPERATURES FOR YOUR SPECIFIC ENGINE.

• To adjust the Overheat set temp, press the

• Please see Step 5 to set the Throttle Servo Limiter.

UP or DOWN button (Fig a).

c or f = Max Temp Fail Safe Setup Screen

(Fig a)

4. Voltage Fail Safe (Second Menu Screen)

The Voltage Fail Safe uses the same safety features as the Overheat Fail Safe but instead of monitoring engine temp,
it monitors the voltage of the receiver battery pack. The receiver battery pack supplies power to all of the on-board electronics
on your model, including the servos. If the voltage of the receiver pack drops too low, the system will not have enough power
to signal the servos and they will “stick” in the position of the last signal received. If the last signal was wide open throttle, the
car will become an out of control safety hazard. After you set the minimum safe voltage using the instructions below, the VST
will constantly monitor the receiver battery pack voltage. If the system records two consecutive voltage readings below the
minimum safe voltage, the Voltage Fail Safe will be activated. When the VST records the first voltage reading above the
minimum safe voltage, it will disengage the voltage fail safe function and return the model to it’s full operating potential.

• To access the Voltage Fail Safe Screen, press the SET button twice.

SET

4.2 v

SET

• The Voltage Fail Safe can be set in 0.1 volt increments from 3.0 to 5.4 volts.

NOTE! Venom recommends a setting of no less than 4.2 volts.

• To adjust the low voltage set value, press the

• Please see Step 5 to set the Throttle Servo Limiter.

NOTE! The VST Voltage Fail Safe will not engage if there is a total battery failure
(ex. battery falls out of the model during a crash).

UP or DOWN button.

v = Voltage Fail Safe Setup Screen

5. Throttle Servo Limiter for Temperature / Voltage Fail Safe (Third Menu Screen)

In the Throttle Servo Limiter screen, the VST can be programmed to reduce the amount of throttle available during a Low
Voltage or Overheat situation. When either the Voltage Fail Safe or Overheat Fail Safe is engaged, the VST will
reduce the maximum throttle available to your choice of 20%, 40%, 60%, 80%, or 99% of normal throttle limit.

Racers Note: If you wish to effectively disengage the voltage and temperature fail safe options, set the throttle throw
percentage to 99%.

• To access the Throttle Servo Limiter menu,
press the SET button three times.

SET

60 P

SET

• To adjust the throttle percentage value,
press the up or down button.

• The number refers to the percentage of full
servo travel that will be available when
the fail safe is activated (See Fig b).

• The value can be set to 20%, 40%, 60%,
80%, or 99%.

p = Throttle Servo Limiter Setup Screen

Fig b

40%

20%

Idle

0%

Brakes

60%

80%

99%

Full Throttle

100%

Note:
Drawing is for reference
only. Your Servos and
their functioning may
vary.

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