FLUKE-789 Fluke Electronics, FLUKE-789 Datasheet - Page 30
FLUKE-789
Manufacturer Part Number
FLUKE-789
Description
PROCESSMETER DMM W/4-20MA SOURCE
Manufacturer
Fluke Electronics
Series
ProcessMeter™r
Type
Digital (DMM)r
Specifications of FLUKE-789
Includes
Battery, Clips, Test Leads
Style
Handheld
Display Digits
4.5
Display Type
LCD, Dual
Display Count
20000
Function
Voltage, Current, Resistance, Frequency
Functions, Extra
Continuity, Diode Test
Features
Auto Off, Backlight, Hold, Min/Max/Ave
Ranging
Auto/Manual
Response
True RMS
Lead Free Status / RoHS Status
Lead free / RoHS compliant by exemption
Other names
1633984
614-1075
789
614-1075
789
789
Users Manual
Simulate Mode
Simulate mode is so named because the meter simulates
a current loop transmitter. Use simulate mode when an
external dc voltage of 15 to 48 V is in series with the
current loop under test.
Simulate mode is selected automatically by inserting the
test leads into the SIMULATE
Figure 8. Simulate mode conserves battery life, so use it
instead of source mode whenever possible.
The display looks the same in source and simulate
modes. The way to tell which mode is in use is to see
which pair of output jacks is in use.
22
Set the rotary function switch to one of the
mA output settings BEFORE connecting the
test leads to a current loop. Otherwise, a low
impedance from the other rotary function
switch positions could be presented to the
loop, causing up to 35 mA to flow in the loop.
WCaution
and
jacks as shown in
Changing the Current Span
The meter’s current output span has two settings (with
overrange to 24 mA):
To find out which span is selected, short the OUTPUT
SOURCE
OUTPUT [ mA, and observe the 0 % output level.
To toggle and save the current output span in nonvolatile
memory (retained when the power is turned off):
1.
2.
3.
4 mA = 0 %, 20 mA = 100 % (factory default)
0 mA = 0 %, 20 mA = 100 %
Turn off the meter.
Hold down
Wait at least 2 seconds, then release
and
R
jacks, turn the rotary function switch to
while turning the meter on.
R
.