Fluke PM6685R User Manual
Output Subsystem
The analog output is turned off as a de-
fault. You turn it on/off and set the scal-
ing factor under ANALOG OUT in the
aux menu.
Scaling Factor
The scaling factor has two functions:
–
–
Its exponent selects which digits to output
on the analog output.
–
Its value sets what reading should represent
full scale.
As default, the scaling factor is 1 (1E0).
This means that the full scale value is
0.999 and the analog output converts the
fraction (digits to the right of the decimal
point) to a voltage.
The scaling factor should be:
Scaling factor
The scaling factor should be:
Scaling factor
full scale value
=
1
where full scale value is the value for
which you want the analog output to out-
put its maximum voltage (5 V).
Example:
–
Example:
–
Take a measurement result, for instance:
12.34567890 E+6 Hz
–
Represent this result without exponent:
12345678.90 Hz
–
Multiply this value with the scaling factor,
for instance 0.001.
12345.67890
–
Take the fractional part of the result:
.67890
Using the Subsystems
Output Subsystem 6-11
5 0 Ω/ 1 M Ω
5 0 Ω/ 1 M Ω
1 2 V r m s - 5 0 Ω
3 5 0 V p - 1 M Ω
5 0 Ω
# 8
5 V r a n g e
. 6 7 8 9 0 o n t h e d i s p l a y
g i v e s 3 . 3 8 V w i t h
s c a l i n g f a c t o r 1
A N A L O G O U T
c o n n e c t o r
A n a l o g O u t = O N , s e t s c a l i n g f a c t o r a n d e x p o n e n t
s c a l i n g f a c t o r 1
s c a l i n g f a c t o r 4
S c a l i n g f a c t o r s e l e c t s
f u l l s c a l e v a l u e
S c a l i n g e x p o n e n t m o v e s
i n s e r t i o n p o i n t
Figure 6-3
The analog output func-
tion.