FLUKE-789 Fluke Electronics, FLUKE-789 Datasheet - Page 37
![PROCESSMETER DMM W/4-20MA SOURCE](/photos/27/4/270434/fluke-_789_sml.jpg)
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
Loop Power Supply Mode
The Loop Power Supply Mode can be used for powering
up a process instrument (transmitter). While in Loop
Power Mode, the meter acts like a battery. The process
instrument regulates the current. At the same time, the
meter measures the current that the process instrument
is drawing.
The meter supplies loop power at a nominal 24 V dc. An
internal series resistance of 250
communication with HART and other smart devices by
pressing J(Blue). Pressing J(Blue) again switches out
this internal resistance.
When loop power is enabled, the meter is configured to
measure mA and > 24 V dc is sourced between the mA
and A jacks. The mA jack is the common and the A jack
is at > 24 V dc. Connect the meter in series with the
instrument current loop as Figure 10 shows.
can be switched in for
32
30
28
26
24
22
20
Figure 9. Loop Power Voltage vs. Current
0
Loop voltage w/ 250
4
8
Current (mA)
Loop Power Supply Mode
12
Loop voltage w/o 250
16
ProcessMeter
20
24
anw020f.eps
29