Fluke 902 Application Note
Application Note
F r o m t h e F l u k e D i g i t a l L i b r a r y @ w w w . f l u k e . c o m / l i b r a r y
Tester: Eric Sundby is a service
foreman, MacDonald-Miller Facility
Solutions
Tools: Fluke 902 True-rms HVAC
Clamp Meter
Tests: Voltage and current tests,
phase imbalances in both voltage
and current, and surface temperature
Testing
Functions
Case
Study
Standardizing on clamp
meters for HVAC service
MacDonald-Miller Facility
Solutions is a leading construc-
tion, engineering, control sys-
tems and building services firm
headquartered in Seattle, WA.
The company’s Building Services
group is the largest commercial
HVAC service company in the
Northwest, with offices located
throughout Western Washington
and into Oregon. They provide
maintenance, repair, overhaul,
and installation of everything
from centrifugal and reciprocat-
ing refrigeration systems to elec-
tronic building control systems.
They also perform air balancing,
chemical treatment of water
systems, plumbing, and electri-
cal services and have extensive
experience with specialized
applications such as clean rooms,
computer rooms, research labs,
and medical and testing facilities.
Eric Sundby is a service fore-
man in the Everett, WA office;
he supervises ten field techni-
cians who work on all aspects
of HVAC, doing heating, cooling
and associated measurements,
electrical test on motors pumps,
compressors, electric boilers, fur-
naces and flame signals and the
list goes on.
The facilities cover “pretty
much everything commercial,”
says Sundby, from retail strip
malls to light commercial struc-
tures to high-rises to biotech
facilities, including hospitals,
medical facilities and clean
rooms used in research and
development. They also work
on cell sites, cell towers, switch
stations and telecommunication
hubs.
MacDonald-Miller has stan-
dardized on the Fluke 902 Clamp
Meter for daily maintenance
work, using 80 of the instru-
ments for the day-in, day-out
voltage, current and temperature
readings. “For the day-to-day
stuff the Fluke 902 is pretty much
our workhorse,” says Sundby.
In addition to a 902, each
technician carries his or her
choice of personal instruments;
Sundby carries Fluke Model 77
and 23 Digital Multimeters, and a
52 temperature probe “for doing
other things, when I need to get
a little more technical.” Several
technicians also have calibra-
tors that make it possible to test
4 mA to 20 mA and low voltage
0 V to 10 V dc, 2 V dc to 10 V dc
signals. The company also has
some Fluke 789 meters in ser-
vice for control work and trouble
shooting.
Checking temperature differences
across the exchanger, very verify
chiller barrel performance.
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