i400
Instruction Sheet
i400
AC Current Clamp
Introduction
The Model i400 (hereafter called “the Current Clamp”) is an ac
current clamp that outputs 1 mA/A via safety-shrouded banana
plugs; it is designed to extend the measuring capability of an
ac current meter to 400 A.
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 fixedequipment 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 live
,
conductors is permitted.
T Product is protected by double insulation.
W Risk of Danger. Important information. See Instruction Sheet.
X Hazardous voltage.
Conforms to relevant Canadian Standards Association
)
directives.
P Conforms to relevant European Union directives.
PN 2282667
December 2004
© 2004 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
®
Electrical Specifications
Reference Conditions: 23 ± 5 °C, 20 to 75 % RH; conductor
centered in jaw opening; no dc component; no adjacent
conductor
Measurement Range: 1 A to 400 A ac rms
Output: 1 mA/A
Accuracy: 2 % + 0.06 A, 45 Hz to 400 Hz
Typical Bandwidth: 5 Hz to 20 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
Load Impedance: < 10 Ω
Maximum Non-destructive Current: 1000 A
Duty Cycle: 1 A to 400 A continuous
Influence of Adjacent Conductor: < 7.5 mA/A
Influence of Conductor Position in Jaw Opening: ± 1.0 % of
reading + 0.05 A
Safety Specifications
Category Rating: CAT III 1000 V and CAT IV 600 V per
EN61010-1, Pollution Degree 2 IEC 61010-02-032
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 2
nd
Edition
General Specifications
Output Cable Length: 1.5 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; Non-operating: 12000 m
Dimensions: 150 x 70 x 30 mm
Weight: 114 g
Instrument Compatibility
The i400 is compatible with any Fluke Multimeter or any other
current measurement device that has the following features:
• 20 mA ac or greater current range
• Banana inputs
• Input accuracy of 2 % or better to take full advantage of
the accuracy of the Current Clamp.
• Input impedance of < 10 Ω
Measurement Considerations
Observe the following guidelines for positioning the Current
Clamp jaws:
• 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 jaw of the Current
Clamp.
Observe the following guidelines when making measurements:
• Avoid taking measurements close to other current-carrying
conductors.
• The Current Clamp displays current readings at 1/1000 of
the actual current on the conductor. For example, a
5 A input current will be transformed into a 5 mA output
current.
Low-Level Current Measurements
The Current Clamp is specified to measure currents of 1 A or
greater. Measurement accuracy of currents less than 1 A is
unspecified.
Operation
To use the i400, (refer to Figure 1):
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