Spektrum SR215 Manual page 6

EN
Requirements
Inadequate power systems that are unable to provide the necessary minimum
voltage to the receiver during operation have become the number one cause of
control failures. Some of the power system components that affect the ability to
properly deliver adequate power include:
• Receiver battery pack (number of cells, capacity, cell type, state of charge)
• The ESC's capability to deliver current to the receiver in electric vehicles
• The switch harness, battery leads, servo leads, regulators etc.
The SR215, SR315, and SR515 have a minimum operational voltage of 3.5V; it
is highly recommended the power system be tested per the guidelines below.
Recommended Power System Test Guidelines
If a questionable power system is being used (e.g. small or old battery,
ESC that may not have a BEC that will support high-current draw, etc.), it is
recommended that a voltmeter be used to perform the following tests.
®
The Hangar 9 Digital Servo & Rx Current Meter (HAN172) is the perfect tool to
perform the test below.
Plug the voltmeter into an open channel port in the receiver and with the
system on, or simply monitor the voltage on a telemetry capable transmitter,
gently apply pressure to the wheels to put a steering load on the servo, while
monitoring the voltage at the receiver. The voltage should remain above 3.5V
even when all servos are heavily loaded.
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