Fluke 368 User manual

November 2015 Rev. 1, 6/19
©2015-2019 Fluke Corporation. All rights reserved.
Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
368/368 FC
369/369 FC
AC Leakage Current Clamp
Users Manual
Users Manu
a

LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for one year from
the date of purchase. This warranty does not cover fuses, disposable batteries, or damage
from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation
or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf. To
obtain service during the warranty period, contact your nearest Fluke authorized service
center to obtain return authorization information, then send the product to that Service Center
with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS
FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS
NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or
countries do not allow the exclusion or limitation of an implied warranty or of incidental or
consequential damages, this limitation of liability may not apply to you.
11/99
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
ООО «Флюк СИАЙЭС»
125167, г. Москва, Ленинградский
проспект дом 37,
корпус 9, подъезд 4, 1 этаж

i
Title Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
How to Contact Fluke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
The Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Manual-Range Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Clean the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
AC Current Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Safety Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Wireless Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Operational Error for Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Product Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table of Contents

368/368 FC/369/369 FC
Users Manual
ii

1
Introduction
The 368/368 FC and 369/369 FC AC Leakage Current Clamp (the Product) is a handheld tool for
measurement of ac leakage current.
Principle of Leakage Current Measurement
Based on the electromagnetic induction principle, the Product has a ring-shape current transformer
comprised of a metal core and coil winding. The current transformer senses the magnetic field produced
by the current or by the vector sum of the currents flowing in the conductor under test. The current
transformer then produces a current proportional to the current flowing in the conductor.
See the Product Functions section near the end of this manual.

368/368 FC/369/369 FC
Users Manual
2
How to Contact Fluke
To contact Fluke, call one of the following telephone numbers:
• Technical Support USA: 1-800-44-FLUKE (1-800-443-5853)
• Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)
• Canada: 1-800-36-FLUKE (1-800-363-5853)
• Europe: [phone]
• Japan: [phone]
• Singapore: [phone]
• China: [phone]
• Brazil: [phone]
• Anywhere in the world: [phone]
Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To view, print, or download the latest manual supplement, visit http://us.fluke.com/usen/support/manuals.
Safety Information
General Safety Information is in the printed Safety Information document that ships with the Product and
at www.fluke.com. More specific safety information is listed where applicable.

AC Leakage Current Clamp
Product Overview
3
Product Overview
Table 1 and Figure 1 explain the Product features.
Table 1. Features
Item Definition
Keep fingers below the Tactile Barrier.
Push  to retain the measured data on the display. When pushed,  shows on
the display. When pushed again, data hold is canceled and  disappears.
The display shows the measured value (digital reading), unit, function, and low battery
symbol.
Push  to choose the range of ac current (either mA or A). Push and hold  for
2 seconds to turn on the filter.
368 FC/369 FC: Log data and clear memory, see Product Functions.
368 FC/369 FC: Turn on/turn off the Fluke Connect™ wireless connectivity to a
smartphone, see Product Functions.

368/368 FC/369/369 FC
Users Manual
4
Push  to show the minimum, maximum, and average reading. When pushed,
 shows on the display.
Push  to turn on the display backlight. Push and hold  for 2 seconds to turn on the
spotlight. See Spotlight.
Push  to turn on or turns off the Product.
Jaw trigger
Push the jaw lock button and the trigger together to unlock the jaw.
Spotlight. See Spotlight.
Jaw
Battery Housing holds the batteries. See Batteries.
Table 1. Features (cont.)
Item Definition

AC Leakage Current Clamp
Product Overview
5
Figure 1. Product Features
1
13
12
9
3 23
4
7
8
9
10
11
14
3
4
3
5
6

368/368 FC/369/369 FC
Users Manual
6
The Display
Table 2 and Figure 2 explain the Product display.
Table 2. Display
Item Definition
Battery Symbol
Main display
The Product is searching for ranges.
Fluke Connect on (368 FC and 369 FC)
Min, Max, or Avg reading is showing.
MinMax mode is active.
Hold mode is active.
Filter is active and filters signals from 40 Hz – 70 Hz.
mA AC or A AC
Remaining memory (368 FC and 369 FC)
Product identification number when used with Fluke Connect (368 FC and 369 FC).