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2.4 Power Supply
The Model 8220 is powered by six 1.5V AA (LR6) alkaline batteries (standard or
rechargeable). See § 6 for information on changing and recharging the batteries.
Battery life is dependent on type of battery:
Type of power supply
AA batteries
NiMH 1800mAh accumulators
NiCd 900mAh accumulators
Low Battery Indication Level:
Level 1 - The
weak, but the instrument can still be used.
Level 2 - The
(and repeated 7 times for a whole minute) a beeping sound is emit-
ted together with the message "batt" displayed on the screen. After one
minute, the instrument turns itself off.
2.5 Optically Coupled USB Interface
The optically coupled interface (Figure 2-1, item 8) provides an isolated, two-way
connection between the Model 8220 and a PC for transmission of the information
in memory (photographs, motor starts, records) and all instantaneous measure-
ments and photographs displayed on the screen of the Model 8220.
The transfer rate is determined automatically by the Model 8220 according to the
software used; the maximum rate is 115.2 kbps.
2.6 Button Functions
2.6.1
Photograph Button
This button photographs all the measurement pages displayed in the following
rotary switch positions:
When the
button is pressed, all the pages in the voltage, current, power,
voltage harmonics and current harmonics modes are photographed and the next
screen is displayed.
Power Quality Analyzer Model 8220
symbol will flash once per second when the battery voltage is
symbol flashes once per second. In addition, every 10 seconds
,
,
Back-lighting
Without
> 40 hours
> 30 hours
> 15 hours
.
With
> 20 hours
> 16 hours
> 8 hours
13
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