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Initial Start-Up
NOTE
Current Adjustment
The analyzer requires that constant current be supplied to the coils.
• Turn Knob 1 to the SET position. Adjust the CURRENT ADJUST
knob until the digital readout displays 120.0 ±0.1. See Figure 3-1.
NOTE
Low Battery Warning
All three decimal points appear on the digital display to indicate a "low
battery" voltage. The analyzer can be used with this low-battery indica-
tor displayed, but when the battery voltage reaches the point at which it
is impossible to adjust the readout to the 120.0 ± 0.1 position, you must
replace the battery. Follow the procedure in Chapter 1 "Replacing the Bat-
tery."
NOTE
OPErATION
The 120HD analyzer has a backlit digital display. When Knob 1 is turned
to the SET position or to the second TEST position there is an icon of a
light bulb
that indicates that the display screen will be backlit when
using these functions. Use the backlit TEST function to perform tests
when the lighting is dim and the display is difficult to view.
This adjustment should be made before each reading.
The Low Battery indicator appears when the battery voltage reaches
4.25V or approximately 150 hours of use. It will maintain 120 mA
current without adjustment until the voltage reaches 4.025V or ap-
proximately 159 hours.
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Operation
3-1
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