Measurement Considerations - Fluke i200 Instruction Sheet

Using the Current Clamp
To use the Current Clamp, follow these instructions:
1. Connect the i200/i200s Current Clamp to the desired input on
the measuring instrument.
i200: See Figure 2.
i200s: See Figure 3. When you are using a multimeter, use the
Dual Banana to BNC Adapter (PM9081) to connect the Current
Clamp to the input.
2. i200s: On the Current Clamp, select the least sensitive range
(10 mV/A).
3. i200s: Select the appropriate clamp sensitivity on your
ScopeMeter test tool or oscilloscope.
4. Position the Current Clamp perpendicular to and centered
around the conductor.
5. Make sure that the arrow marked on the clamp jaw points
toward the load for phase measurements or away from the
load (toward the source) for neutral measurements. (See
Figure 4.)
6. Observe the current value and waveform on the instrument's
display.
7. i200s: If desired, select a lower range on the Current Clamp
and set the corresponding sensitivity (mV/A setting) on the
ScopeMeter test tool or oscilloscope.
Example with multimeters for i200:
Current Clamp sensitivity = 1 mA/A. Multimeter displays 168 mA.
=
Actual current
display value 168 mA
= =
168A
sensitivit y Current Clamp 1 mA/A
Example with multimeters for i200s:
Current Clamp set to 10 mV/A. Multimeter displays 1.85V.
=
Actual current
display value 1.85V 1850 mV
= = = 185A
sensitivit y Current Clamp 10 mV/A 10 mV/A
Range
selector
Figure 2. Measurement Setup for i200
Ω
V
V
COM
ST8591_190
Figure 3. Measurement Setup for i200s
Warning
If the sensitivity setting (mV/A) of the ScopeMeter test
tool or oscilloscope does not correspond with the
setting of the Current Clamp, the ScopeMeter test tool
or oscilloscope may display a much lower current
than the actual value. This may result in a false and
misleading reading and, as a consequence, incorrect
measures to be taken.
Measurement at
a phase
conductor
Measurement at
a neutral
conductor
Figure 4. Orientation of the Current Clamp

Measurement Considerations

Observe the following guidelines for positioning the Current Clamp
Jaws:
•
Center the conductor inside the clamp jaws.
•
Make sure the clamp is perpendicular to the conductor.
•
Make sure that the arrow marked on the jaw of the Current
Clamp points toward the correct direction.
Observe the following guidelines when making measurements:
• Avoid taking measurements close to other current-carrying
conductors.
• On the i200s Current Clamp, select the most appropriate range
for the current being measured to get the best accuracy.
Maintenance
Before each use, inspect the clamp. Look for cracks or missing
portions of the clamp housing and output cable insulating cover and
for loose or weakened components. Pay particular attention to the
insulation surrounding the clamp jaws. Do not use a damaged
clamp. If a clamp is damaged, tape it shut to prevent unintended
operation. A damaged clamp under warranty will be promptly
repaired or replaced (at Fluke's discretion) and returned at no
charge.
Cleaning and Storage
Periodically wipe the case with a damp cloth and detergent; do not
use abrasives or solvents. Open the jaws and wipe the magnetic
pole pieces with a lightly oiled cloth. Do not allow rust or corrosion
to form on the magnetic core ends.
If your Current Clamp does not work
If the Current Clamp does not perform properly, use the following
steps to help isolate the problem:
•
Inspect the jaw mating surface for cleanliness. If any foreign
material is present, the jaws will not close properly and errors
will result.
• Verify that the function selection and range on the Multimeter,
ScopeMeter test tool or oscilloscope are correct and adjusted
to the sensitivity of the Current Clamp.
LIMITED WARRANTY & 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 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,
send your defective product to the nearest Fluke Authorized 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.
Fluke Corporation Fluke Industrial B.V.
P.O. Box 9090 P.O. Box 90
Everett WA 7600 AB Almelo
98206-9090, USA The Netherlands
SERVICE CENTERS
To locate an authorized service center,
visit us on the World Wide Web:
http://www.fluke.com
or call Fluke using any of the phone numbers listed below:
+1-888-993-5853 in U.S.A. and Canada
+31-40-267-5200 in Europe
+1-425-446-5500 from other countries