Maintenance
XW Warning
To avoid possible electric shock or personal
injury:
• Before each use, inspect the Current 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 Current 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 extra charge.
If the Current Clamp does not work or perform properly, use
the following steps to help isolate the problem:
1. Inspect the jaw mating surface for cleanliness. If any
foreign material is present, the jaw will not close properly
and measurement errors will result.
2. Verify that the function selection and range on the
Multimeter are correct and adjusted to the sensitivity of
the Current Clamp.
Cleaning
Periodically wipe the case with a damp cloth and mild
detergent. W Caution
To avoid damaging the Current Clamp, do not use
abrasives or solvents to clean the clamp.
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.
LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defect s in material and
workmanshi p for one year from t he date of purchase. This warranty
does not c over fuses , dispos abl e batteries , or dam age from acc i dent,
neglect, misus e, al teration, contamination, or abnormal conditions of
operation or handling. Resellers are not authorized t o extend any ot her
warranty on Fluke’s behalf . To obtain service during the warranty
period, cont act your nearest Fluke authorized s ervice c ent er to obtain
return authoriz ation inform ation, then send the product to that S ervice
Center with a descripti on of the problem.
THIS WA RRANTY IS YOUR ONLY RE M EDY. 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 THE O RY . Since some states or c ountries do not al l ow the
exclusion or limi tation of an i mplied warranty or of incidental or
consequential damages , this limitation of liabilit y may not apply to you.
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
11/99
PN 2282671
October 2004
© 2004 Fluke Corporation, Al l rights reserved. Printed i n U.S.A.
All product names are trademarks of their respective compani es.
®
Instruction Sheet
i400s
AC Current Clamp
Introduction
The i400s (hereafter called “Current Clamp”) is compatible
with any instrument capable of ac millivolt measurements. It
can accept a standard BNC connector, and has an input
impedance of greater than or equal to 1 M e in parallel with a
maximum of 47 pF. The Current Clamp can also be used with
digital multimeters using a BNC-to-banana jack adapter.
Contacting Fluke
To contac t Fl uke, cal l one of the following telephone numbers:
USA: 1-888-44-FLUK E (1-888-443-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-675-200
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in t he worl d: +1-425-446-5500
USA Service: 1-888-99-FLUKE (1-888-993-5853)
Or, vis i t Fluke's Web site at www.fluke.com.
To register your product, visit register.fluke.com
Safety Information
XW Read First: Safety Information
To ensure safe operation and service of the
current clamp, follow these instructions:
• Read the operating instructions before use
and follow all safety instructions.
• Use the Current Clamp only as specified in
the operating instructions, otherwise the
clamp’s safety features may not protect you.
• Adhere to local and national safety codes.
Individual protective equipment must be used
to prevent shock and arc blast injury where
hazardous live conductors are exposed.
• Do not hold the Current Clamp anywhere
beyond the tactile barrier, see Figure 1.
• Before each use, inspect the Current Clamp.
Look for cracks or missing portions of the
clamp housing or output cable insulation.
Also look for loose or weakened
components. Pay particular attention to the
insulation surrounding the jaws.
• Never use the clamp on a circuit with
voltages higher than 1000 V CAT III or 600 V
CAT IV.
• CAT III equipment is designed to protect
against transients in equipment in fixed-
equipment installations, such as
distribution panels, feeders and short
branch circuits, and lighting systems in
large buildings.
• CAT IV equipment is designed to protect
against transients from the primary
supply level, such as an electricity meter
or an overhead or underground utility
service.
• Use extreme caution when working around
bare conductors or bus bars. Contact with the
conductor could result in electric shock.
• Use caution when working with voltages
above 60 V dc or 30 V ac. Such voltages pose
a shock hazard.
Symbols
, Application around and removal from hazardous l i ve
conduct ors is permi tted.
T Product i s protect ed by double insul ation.
W Risk of Danger. Important inf orm ation. See Instruction Sheet.
X Hazardous v ol tage.
) Conforms to relevant Canadian Standards A ssoci ation
directives.
P Conforms t o rel evant European Union di rectiv es.
Safety Specifications
Category Rating: CAT III 1000 V and CAT IV 600 V per
EN61010-1, Pollution Degree 2
EMC: EN 61326-1, FCC for emission and immunity
): Tested to US and Canadian standards for compliance to
UL61010-1 and CAN/CSA C22.2 No. 101.1:2004
P: IEC 61010-1 2nd Edition IEC 61010-02-032
Electrical Specifications
Reference Conditions: 23 ± 5 °C, 20 to 75 % RH; conductor
centered in jaw opening; no DC component; no adjacent
conductor.
40 A Range 400 A Range
Measurement Range: 0.5 A to 40 A 5 A to 400 A
Output: 10 mV/A 1 mV/A
Accuracy:
45 Hz to 400 Hz
2 % + 0.015 A
2 % + 0.04 A
Phase Shift:
(45 Hz to 400 Hz)
0.5 A to 1 A
1 A to 5 A
5 A to 10 A
10 A to 20 A
20 A to 40 A
40 A to 400 A
Unspecified
4û
3û
3û
2û
NA
NA
NA
Unspecified
2û
2û
1.5û
Crest Factor: ≤3 ≤3 to 300 A
≤2.5 to 400 A
Typical Bandwidth: 5 Hz to 10 kHz
Working Voltage: 1000 V ac rms, in compliance with
EN61010
Common Mode Voltage: 1000 V ac rms from earth ground, in
compliance with EN61010
Input Load Impedance (of host instrument): > 1 M Ω in
parallel with up to 47 pF
Maximum Non-destructive Current: 1000 A
Duty Cycle: 0.5 A to 400 A continuous
Influence of Adjacent Conductor: < 9.0 mA/A
Influence of Conductor Position in Jaw Opening: ± 1.0 %
of reading + 0.05 A
General Specifications
Output Cable Length: 2.5 m
Maximum Conductor Size: 32 mm
Storage Temperature: -20 °C to 60 °C
Operating Temperature: 0 °C to 50 °C
Relative Humidity: 10 °C to 30 °C: 95 %
30 °C to 40 °C: 75 %
40 °C to 50 °C: 45 %
Temperature Coefficient: 0.01 % X (specified accuracy)/ °C
(< 18 °C or > 28 °C)
Altitude: Operating: 2000 m; 2000 m to 4000 m, derate
category rating to 1000 V CAT II/600 V CAT III, Non-operating:
12000 m
Dimensions: 150 x 70 x 30 mm
Weight: 114 g
Instrument Compatibility
The i400s is compatible with any Fluke Multimeter or any other
current measurement device that has the following features:
• BNC or Banana inputs
• Input accuracy of 2 % or better to take full advantage of
the accuracy of the Current Clamp.
• Input impedance of > 1 M Ω in parallel with up to 47 pF
Measurement Considerations
• Center the conductor inside the Current Clamp jaw.
• Make sure the clamp is perpendicular to the conductor.
• For optimal reading, make sure the conductor is
positioned between the alignment marks on the jaws of
the Current Clamp.
Observe the following guidelines when making measurements:
• Avoid taking measurements close to other current-
carrying conductors.
Operation
To use the i400s, refer to “Measurement Considerations” and
Figure 1:
1. If necessary, add a banana plug to the BNC connector
on the i400s.
2. Connect the clamp cable to the instrument. If using an
adapter, use the common and volts inputs of the meter
and switch it on.
3. Make sure the clamp and the measurement instrument
are set to the proper range. Use the range select
switch on the clamp.
4. The arrow on the top of the clamp must face towards
the load of the circuit.
5. Connect the current clamp jaws around the conductor
to be measured.
XW Warning
To avoid shock or personal injury, keep fingers
behind the tactile barrier, see Figure 1.
Single Current
Carrying
Conductor
Tactile Barrier
Alignment
Marks
Load Direction Arrow
Banana
Plug
Range
Switch
ayn03.eps
Figure 1. i400s Setup
