Selecting the range, Understanding the display, Primary display – Fluke 189 User Manual
Model 187 & 189
Selecting the Range
to select either a fixed range or the
You cannot use
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
to enter MANUAL
ranging in the present range. You can then select the next
manual range each time you press
. Return to
autoranging by pressing
Understanding the Display
Display features are shown in Figure 2-4 and described in
Table 2-3. Major display features are described in the
You can show all display segments (as shown in
Figure 2-4) by pressing
while turning the
meter on. Release
to turn off the full
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.