Fluke 189 - Manual (Page 24)

Model 187 & 189
Users Manual
2-10
Selecting the Range
Press R to select either a fixed range or the
autorange feature.
Note
You cannot use R in conductance, diode
test, and temperature functions or with the REL,
MIN MAX, and FAST MN MX features. These
selections all use a specific fixed range.
Autoranging (AUTO lighted in the display) always comes
on initially when you select a new function. In autorange,
the meter selects the lowest input range possible,
ensuring that the reading appears with the highest
available precision (resolution).
If AUTO is already on, press R to enter MANUAL
ranging in the present range. You can then select the next
manual range each time you press
R
. Return to
autoranging by pressing
O N
(CANCEL).
Understanding the Display
Display features are shown in Figure 2-4 and described in
Table 2-3. Major display features are described in the
following paragraphs.
Note
You can show all display segments (as shown in
Figure 2-4) by pressing
Q while turning the
meter on. Release
Q
to turn off the full
display.
Primary Display
The primary display usually shows the present reading for
the rotary switch function. For most of these functions, the
primary display can be set to show 4 or 5 digits. See
Chapter 5 for more information about display digits.
Other uses for this display are:
•
AutoHOLD: most recent held reading.
•
MIN MAX: maximum, minimum, or average value.