The Tough Just Got Tougher
Introducing the new Fluke 70/20 Series III.
Designed to meet the new international
safety standards for digital multimeters.
Cat I
Electronic
Cat I
• Electronic
Equipment
• Low Energy
Equipment
with transient
limiting
protection
TRUE RMS MULTIMETER
79
Cat II
Appliances,
PCs, TVs
Cat II
• Outlets and
long branch
circuits
• All outlets at
more than
10m (30 ft.)
from Category
III source
• All outlets
at more than
20m (60 ft.)
from Category
IV source
Cat II
MC Panels, etc.
Service
Entrance
Service
Entrance
Service
Entrance
Cat III
• Feeders and short
branch circuits
• Distribution
panel devices
• Heavy appliance
outlets with “short”
connections to
service entrance
Cat IV
Meter
Meter
Underground Service
Underground Service
Outbuilding
OutbuildingTransformer
Cat IV
• Outside and service
entrance
• Service drop from
pole to building
• Run between meter
and panel
• Overhead line to
detached building
• Underground line to
well pump
RANGE HOLD
40 CAL
Hz 20kHz
V 1kHz
OFF
Demarcation between Installation Categories III and IV is arbitrarily taken to be at
V
mV
Hz
V
40
V
mA
CAT
600V
1000V
FUSED
10A
the meter or at the mains disconnect (ANSI/NPPA 70-1990 [2], Article 230-70) for
low-voltage service, or at the secondary of the service transformer if the service
is provided to the user at a higher voltage.
40
For more information, see ISA-8582.01-1994, Annex J Source: ANSI/IEEE C6241-1991
A
Call 1-800-44-FLUKE for The ABCs of Multimeter
Safety application note, B0317UEN Rev A or you can
CAT
COM
call 1-800-526-4 731 to order The ABCs of Multimeter
Safety Video P/N 609104.
Fluke Series II to Series III
Meter Conversion Guide
This handy guide is designed to help you transition
from the Fluke Series II digital multimeters to the
new Fluke Series III digital multimeters.
About your new Series III meter:
This meter has been designed to comply
with a new standard established by the
International Electrotechnical Commission (IEC). The IEC-1010-1 standard
categorizes electrical environments
based on possible overvoltage spikes.
The components and case of this meter
have been designed with adequate
spacing and clearance to withstand
these overvoltage spikes and protect the
user from electric shock and possible arc
blasts.
70/20 Series II/Series III Conversion Table
70/20 70/20
Series II Series III
IEC-348
Class II CAT I CAT II CAT III
70-II 70-III (600V) 70-III (600V) 23-III (600V)
73-II 73-III (600V) 73-III (600V) 23-III (600V)
23-II 23-III (1000V) 23-III (1000V) 23-III (600V)
21-II 21-III (600V) 21-III (600V) 21-III (600V)
75-II 75-III (600V) 75-III (600V) 23-III (600V)
77-II 77-III (1000V) 77-III (1000V) 77-III (600V)
29-II 26-III (1000V) 26-III (1000V) 26-III (600V)
76-II 26-III (1000V) 26-III (1000V) 26-III (600V)
79-II 79-III (1000V) 79-III (1000V) 79-III (600V)
77-III (1000V) 77-III (1000V) 77-III (600V)
77-III (1000V) 77-III (1000V) 77-III (600V)
23-III (1000V) 23-III (1000V) 23-III (600V)
77-III (1000V) 77-III (1000V) 75-III (600V)
IEC-1010-1
77-III (600V)
77-III (600V)
23-III (600V)
Selecting a new Series III meter:
To select the new 70 or 20 Series III
meter that is best suited to the intended
environment, first use the category
diagram on the reverse to determine the
appropriate category. On the conversion
table below, find the row which lists the
70 or 20 Series II meter to be upgraded
and read across the table to the previously-selected IEC 1010-1 category. The
meter(s) listed in this section of the table
are the recommended Series III replacements. The voltage rating for the meter in
each category is shown in parentheses.
For example, if the intended environment
is CAT II, and you wish to upgrade a
77-II, the proper selection is the 77-III,
rated up to 1000V.
Fluke. Keeping your world
up and running.
Fluke Corporation
PO Box 9090,
Everett, WA USA 98206
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
U.S.A. (800) 443-5853 or
Fax (425) 356-5116
Europe/M-East (31 40) 2 678 200 or
Fax (31 40) 2 678 222
Canada (905) 890-7600 or
Fax (905) 890-6866
Other countries (425) 356-5500 or
Fax (425) 356-5116
Web access: http://www.fluke.com
©1997 Fluke Corporation. All rights reserved.
Printed in U.S.A. 9/97 J0872UEN Rev A
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