FINE INSTRUMENTS CORPORATION FINEST 135, User Manual

 Meter shuts OFF after 10 minutes if no pushbutton is

pressed, even if it is making a measurement. To disable the
auto power off, press the ON OFF pushbutton 
is displayed), when if 

 press the ON OFF pushbutton

again, the Meter 

 OFF.

When you want   use this Meter in manual range, press the

RANGE pushbutton, then this Meter is in manual range.
Press RANGE pushbutton for 2 seconds   return   Au-

toranging mode.

This 

 auto power off feature is disabled when you

are using the RECORD mode.

5.4 Measuring AC 

Amperes

When this 

 has been powered up, it defaults in the AC

amperes mode with 

 measurement 

 (AC 

played) and autoranging mode (AUTO displayed), 
automatically selects the proper range for both the bar scale
and the digital display. Press the RANGE pushbutton 
select a fixed scale instead of autoranging. 

 that 

press alternates between the 40A and 400A 

 and

AUTO is no longer displayed. When the reading   beyond
the limits of the digital display, for example, 40A on a 40A
scale, OFL appears 

 the digital display.

Press the RANGE pushbutton for 2 seconds and then release
in 

   return   autoranging mode. This Meter 

ledges wrth a beep 

 and displays AUTO.

5.5 Measuring DC Amperes

Press the AC DC pushbutton 

 select the DC amperes

measurement 

 (AC disappeard on the LCD), but the

 is still in the autoranging mode (AUTO displayed),

unless you press the RANGE pushbutton to enter into the
manual 

 mode.

When the 

 amperes measurement 

   entered, the

display reads 

a 

non-Zero DC amperes (positive or negative)

value due   the presence of the Earth’s Magnetism. This
value is variable according 

 the 

 measuring DC

amperes.

Zero Adjustment 

 the Microprocessor

To initiate the Zero 

 procedure, press the HOLD

pushbutton for 2 

 Then, the 

 beeps and the

display reads Zero just 

 the microprocessor memorized

the right preceding display value 

   used for calculating

the 

 amperes measurement value when measuring

the DC amperes of a 

 conductor.

When measuring the DC amperes of a 
conductor, the DC amperes value 

 a positive or negative

polarity according   the 

 of 

value is 

 when the 

 flows through the 

in the 

 of a right-hand threaded

 And it is negative when the 

 flows through the

conductor in the 

 of 

a 

right-hand

threaded 

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