Lamar Technologies BETA D-50 User Manual

Page 22

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5. CALIBRATION AND MAINTENANCE

F.

SET TIMER

Set the timer by pushing the buttons up or down to a time that will allow
calibration to be completed before the time runs out (for example 60 minutes).

G.

VIEW AND SET CUTOFF VOLTAGE

a. Press and hold the View Voltage Cutoff
button. The set cutoff voltage is shown on the voltmeter display.

b. Use a 1/16 inch (2 mm) slot blade precision type screw driver to adjust the
cutoff voltage. Set it to a value that will allow calibration to be completed before
the cutoff voltage is reached. For example 18 volts for a 24 volt battery or 9 volts
for a 12 volt battery.

H.

PUSH START BUTTON

The audible alarm stops. The voltmeter displays the battery voltage, the
ammeter reads 0 and the timer starts. “OP” on the timer illuminates and the red
LED flashes.

I.

COMPARE VOLT READINGS

Compare the Beta D-50 digital voltmeter reading with the external calibrated
voltmeter.

a. If readings differ less than ± 0.2 volts, the voltmeter is accurately calibrated.
Turn AC power off and disconnect battery.

b. If readings differ more than ± 0.2 volts, continue with steps J through L.















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BETA D-50 TESTER / ANALYZER - OPERATING MANUAL V2.2

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