Fluke 287 Application Note page 2

Recommended procedure for use
First and foremost, read the instruction manual and follow
all safety precautions and use safe work practices.
Using MIN-MAX-AVG
function for signal
monitoring
1. Select the appropriate meter
function for the measurement
to be monitored
2. Attach the test probes to the
test points using suitable
alligator clips or other connec-
tion devices that will allow for
a solid connection while the
monitoring process is in
progress.
3. Once the leads are attached to
the signal to be monitored,
push the MIN MAX pushbutton
once.
4. This starts the recording
process. The Min Max symbol
will appear.
2 Fluke Corporation Min/Max/Avg – An under-utilized function on your DMM
The monitoring process is now
underway and the meter is ready
to capture and display any
changes to the signal which may
occur during the Min-Max
recording process.
Displayed readings
As you can see from the image
because the 287/289 has a large
easy to read dot matrix display all
critical information is easily seen
in the meter's display, the current
date and time, the maximum,
average and minimum values
along with the elapsed time of
each and the actual start time of
the process.
Min-Max in progress
Once the monitoring process is
complete, but before disconnect-
ing the test leads from the circuit,
press the F4 Stop pushbutton.
This retains the recorded values
for viewing and saving. If the
user doesn't press the F4 Stop
pushbutton before disconnection
of the leads the Minimum value
would be lost and the Average
value would be compromised.
In summary, the Min Max
record mode contained within
the Fluke 287 and Fluke 289
multimeters offer the users
another very powerful trouble-
shooting tool by allowing the
user to do unattended monitoring
while looking for unusual signal
events.
Fluke. Keeping your world
up and running.
Fluke Corporation
P.O. Box 9090
Everett, WA USA 98206
Web: www.fluke.com
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
Web: www.fluke.eu
For more information call:
In the U.S.A. (800) 443-5853
or Fax (425) 446 -5116
In Europe/M-East/Africa +31 (0)40 2 675 200
or Fax +31 (0)40 2 675 222
In Canada (905) 890-7600
or Fax (905) 890-6866
From other countries +1 (425) 446 -5500
or Fax +1 (425) 446 -5116
Fluke (UK) Ltd.
52 Hurricane Way
Norwich
Norfolk
NR6 6JB
United Kingdom
Tel: (020) 7942 0700
Fax: (020) 7942 0701
E-mail: industrial@uk.fluke.nl
Web: www.fluke.co.uk
© Copyright 2007 Fluke Corporation. All rights reserved.
Printed in the Netherlands 08/2007 Data subject to alteration
without notice.
Pub id: 11279-eng
®