Lamar Technologies BETA D-50 - Manual (Page 20)

5. CALIBRATION AND MAINTENANCE
5. CALIBRATION AND MAINTENANCE
5.1 OVERVIEW OF CALIBRATION
The Beta D-50 has been calibrated before shipment from the manufacturer. A
certificate of calibration has been issued and is enclosed in the back of this manual.
To ensure error-free operation over time the unit should be re-calibrated every 12 months
depending on usage and changes in surrounding environment.
5.1.1 DIGITAL PANEL METERS
There are two main indicators that can be periodically calibrated: 1) the voltmeter; and
2) the ammeter (see figure 1-1 in section 1). The Beta D-50 is equipped with two sets of test
jacks for easy calibration of these digital display meters. In addition the internal shunt, even
though calibrated and certified by the shunt manufacturer, could be verified.
5.1.2 TIMER
The timer is a very accurate crystal-controlled device, not prone to error. It cannot be
recalibrated, but unless an extremely accurate time reading is required, an accurate
analog or digital stop watch is adequate to validate its accuracy.
5.1.3 OPERATING RANGE
The Beta D-50 discharge current operating range can be modified if either 1) the lower
limit is off zero; or 2) a maximum limit different than factory-preset 50 amperes
discharge current is desired.
WARNING: Calibration should only be performed by
trained personnel. If performed incorrectly it could result in
electrical shock leading to injury or death.
5.2 VOLTMETER CALIBRATION
To calibrate the Beta D-50 voltmeter, an external calibrated digital voltmeter is required as
well as a fully charged battery. The circuit diagram for the calibration can be seen in figure
5-1. The calibration steps are outlined below.
Page 18 BETA D-50 TESTER / ANALYZER - OPERATING MANUAL V2.2