Lamar Technologies BETA D-50 - Manual (Page 21)

5. CALIBRATION AND MAINTENANCE
BETA D-50
BATTERY
VOLMETER
TEST
V PORTS
EXTERNAL CALIBRATED
VOLTMETER
Figure 5-1 - Circuit diagram for voltmeter calibration
A.
SWITCH OFF MAINS POWER
Turn off the AC on-off/reset power switch.
B.
TURN DOWN DISCHARGE CURRENT
Repeatedly turn the Current Adjust knob fully counter-clockwise to set discharge
current to zero.
C.
CONNECT BATTERY
Connect the battery DC cable to the fully charged battery and ensure the
connector is plugged in completely.
D.
PLUG IN VOLTMETER
Plug in the external digital voltmeter into the voltmeter calibration ports. Set it to a
DC voltage range appropriate for the connected battery.
E.
SWITCH ON MAINS POWER
Turn on the AC on-off/reset power switch. An audible alarm sounds, and the Accept
lamp illuminates. Meters read all 6's or 8's.
BETA D-50 TESTER / ANALYZER - OPERATING MANUAL V2.2 Page 19