THE FULLY AUTOMATIC BURNTESTER AND GENERAL GUIDELINES FOR HDV BATTERY BURNTESTING
Fully automatic Burntester 1.5ohm/24Volt - 16Amp (Halcyon Part#75.001.000, FTP $300.00):
The burn tester is composed of:
Once activated, elapsed time or voltage will be displayed by pressing the red button. When the battery reaches 20 volts the burn tester automatically disconnects the battery from the resistance and memorizes the burn time in minutes.
Burntest a new or fully charged battery (Nimh batteries take about 5 complete charge/discharge cycles to get the full capacity)
Make note of the burntest time as a reference for the next burntest.
A burntest every three months in order to verify the battery capacity is suggested. A 35-40% drop on burntest time indicates the battery has to be replaced.
Keeping a burntest log is recommended to compare performance and capacity over time
Excessive burntesting will reduce the battery life.The burntest is a significant stress test for the battery and every burntest should be counted against the battery lifecycle. The burntest gives an indication of the actual battery capacity and only an estimation of the real duration in the underwater use. The real duration on a dive is highly affected by the diver's equipment, current, diver's position, etc. The current draw of the burntester (16 amps @ 24 volts) is MOST appropriate for the higher capacity (18ah+) NiMh and SLA batteries.
The burntester can be used on the Halcyon HDVT16 battery packs BUT the current draw from the burntester will be greater than what the motor will draw under normal in-water use. The burn time using the burntester will be roughly 25% less than what the actual burn time will be under normal in-water use.
For the smaller capacity Halcyon HDVR14 battery packs, the burntester can be used BUT the burntime will be less than the HDVT16.
It is recommended that burntesting smaller battery packs (HDVT16, HDVR14) be done only as needed and on a limited basis because of the stress placed on these smaller capacity battery packs by the 16 amp burntester. In fact, it is recommended that measuring in water burn time from actual dives is the best way to determine capacity of the smaller battery packs without the stress of a deep discharge using the burntester.
Deep discharge to 20volts is not always necessary. This is the cutoff voltage for the burntester but actual battery capacity can easily be determined at 22-23 volts when compared to previous burntest data.
BURNTESTER DATA IS ONLY AN ESTIMATE OF BATTERY CAPACITY. PLEASE REVIEW YOUR PRODUCT MANUAL FOR MORE INFORMATION ABOUT BATTERY LIFE AND MAINTENANCE TO GET THE MOST OUT OF YOUR DIVE VEHICLE BATTERY.