Lamar Technologies BETA D-50 - Manual (Page 10)

2. IF TEST FAILED
The Fail lamp illuminates if the discharge has
been discontinued because the cutoff voltage has been reached before
the completion of the set discharge time. The red LED goes out. The
time is frozen at the elapsed time at which the test failed. The battery is
in need of reconditioning or must be rejected for
aircraft service. Refer to the battery manufacturer's maintenance
manual on how to proceed.
K.
SWITCH AC POWER OFF
Switch the AC on-off/reset switch off before removing he battery.
NOTE: If in emergency it is required to stop the test, switch the unit to
off/reset. When the test is restarted the timer is reset to zero. It may be
necessary to recharge the battery before resuming the test.
Page 8 BETA D-50 TESTER / ANALYZER - OPERATING MANUAL V2.2