Fluke 45 - Manual (Page 35)

45
Users Manual
3-8
AUTO
Press to Enter Manual Range and Up Range
Press to Enter Manual Range and Down Range
Press to Toggle In and Out of Manual Ranging.
"AUTO" Annunciator Turns off when Manual Range Selected.
CAL
ENABLE
V 10A
100
mA
600V CAT I
1000V CAT I
FUSE F1
500 mA
F 250V
POWER
AUTO
2ND
MN MX RATE
dB REL
REF# LOCAL
THRESH ADDR BAUD
HOLD
LO HI COMP
A
A V FREQ
DUAL DISPLAY MULTIMETER 45
V
!
REF
FUSED
COM
aam14f.eps
Figure 3-6. Range Selection Buttons
Manual Ranging
Press
E to toggle in and out of manual ranging. The range you are in when you enter
the manual range mode becomes the selected range.
In manual range, the meter remains in the selected range regardless of input. Press
E to
toggle back to autoranging. Manual ranging can only be performed on readings shown on
the primary display; the secondary display always autoranges.
Press
U to up range. If the U is pressed when the meter is still in autorange, manual
ranging is selected, the AUTO annunciator turns off, and the next higher range is selected
(if there is one).
Press
T to down range. If the T is pressed when the meter is still in autorange,
manual ranging is selected, the AUTO annunciator turns off, and the next lower range is
selected (if there is one).
Measuring Frequency
(
F)
Frequency Ranging
Frequency measurements from 5 Hz to > 1 MHz are automatically ranged so that a
frequency measurement is always displayed with maximum resolution.
If the frequency function (FREQ) is selected in the primary display, press the
Uor T
to manually select a range. (Manual ranging is not allowed in the secondary display.) If
you select a frequency range manually, frequency measurements that exceed the full
scale value of that range cause "OL" (overload) to be displayed. Refer to Table 3-5 for
frequency ranges and full scale values.