Lamar Technologies CA 1550 - Manual (Page 20)

4. OPERATING GUIDE - DISCHARGING
4.4 DISCHARGE TIME
4.4.1 TIMER UNIT SETTING
The CA-1550 has a built in timer, allowing discharge time settings from 1 to 999
minutes.
4.4.2 DISCHARGE TIME SETTING
The discharge time is usually set to 60 minutes, after which a pass/reject signal is
given based on whether the battery reached the cutoff voltage or not.
To determine the full capacity of the battery a longer time can be set (several
hours). The CA-1550 will then continue the discharge test only until the cutoff
voltage has been reached. The timer, cutoff voltage and discharge current displays
will freeze at this point. The capacity can be calculated as the product of the
discharge current and the time passed until the voltage cutoff was reached.
Refer to your battery manufacturer’s maintenance manual for the
recommended discharge times.
D. SET TIMER
Set the timer by pushing the up/down buttons
to the required discharge time (usually 60
minutes)
CAUTION. For lead-acid batteries the
time and voltage cutoff should be set with
caution. If discharge continues too far
beyond the point of exhaustion it may be
harmful to the battery, unless the battery is
soon to be recharged.
4.5 CUTOFF VOLTAGE
The CA-1550 will automatically stop the discharge test when the cutoff voltage has
been reached. The cutoff voltage is set so that if the battery voltage is higher than
the cutoff voltage when the discharge time has expired, the battery has passed the
capacity test.
CA-1550 CHARGER / ANALYZER - OPERATING MANUAL V1.2 Page 18