Application Note

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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

The new Fluke 233

wireless digital multimeter

The removable display option allows you to connect the multimeter

body in hard-to-reach locations and then conduct tests remotely

while monitoring readings on the detachable meter screen.

A sensible solution to an age-old

problem—where to place your

meter display

What if, as an electrical professional, you could

take a clamp-on ammeter reading using your

digital multimeter (DMM) with the disconnect

door or MCC cubicle door closed?

What if a DMM voltage reading could be

taken outside of both the flash protection

boundary and the limited approach boundary?

Imagine observing a specific PLC input on the

input card while standing thirty feet from the

PLC to operate a push button at the equipment

control station?

How many times have you said, “If I only

had a third hand.” If that were true, how much

easier would it be to read your DMM? And, how

much safer?

Using wireless technology

d a detachable display, the

new Fluke 233 True-rms DMM

allows the user to observe and

record data up to thirty feet from

the location of the test probes

and meter body. Moreover, the

strongly magnetized strap option

for the meter and the separate

magnet in the removable display

allow for convenient location of

meter components.

For example, you could attach

the meter to the inside of an

open control-cabinet door while

the meter display, being consid-

erably smaller than the meter

body, was attached at a safe

location inside the panel under

test. If you do much trouble-

shooting or equipment startups,

you’ll immediately recognize the

convenience and time savings

of not having to adjust your

eyesight to a different location in

order to focus on a reading each

time you move the test leads.

Thanks to particular technol-

ogy used in this meter, many of

the earlier concerns about using

a wireless meter—especially

interference issues—go away.

There is no problem with radio

frequency interference with

equipment such as PLCs, VFDs

and electronic control devices.

Sufficient shielding on the meter

and the removable display

prevents electronic interference

with meter readings from sur-

rounding equipment. In fact, the

Fluke 233 has been tested under

severe RF conditions with no ill

effects.

Even so, observing the digital

readout remotely does require

some forethought. Pay atten-

tion to meter body and remote

display location. If the signal

between the two components

becomes weak, the wireless

symbol in the remote display

will begin flashing to alert

the operator. The transmission

Summary of content (2 pages)

PAGE 1
The new Fluke 233 wireless digital multimeter Application Note A sensible solution to an age-old problem—where to place your meter display What if, as an electrical professional, you could take a clamp-on ammeter reading using your digital multimeter (DMM) with the disconnect door or MCC cubicle door closed? What if a DMM voltage reading could be taken outside of both the flash protection boundary and the limited approach boundary? Imagine observing a specific PLC input on the input card while standing thi
PAGE 2
distance is designed for thirty feet. However, in the field, successful readings have been taken at greater distances. Outside the hazard zone Safety when performing work involving electrical hazards is of course paramount. The NFPA 70E, Standard for Electrical Safety in the Workplace, general requirements for safety related work practices, requires test instruments, equipment, and accessories to be “designed for the environment to which they will be exposed, and for the manner in which they will be used.