Fluke 5500A Merkblatt

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PN 600616 August 1995   Rev.8, 1/09 
©1995-2009 Fluke Corporation. All rights reserved. Printed in U.S.A. Product names are trademarks of their respective companies.
  
 
Instruction Sheet 
Model 5500A/COIL 
50-Turn Current Coil 
Introduction 
The 5500A/COIL is a 50-Turn Current Coil used as a tool for calibrating clamp-type current meters that 
operate by two different principles—as current transformers (AC only), and by the Hall Effect (Both AC 
and DC).  It is impractical to calibrate 1000A rated current clamp meters using a 1000A source.  How-
ever, by using the 50 turns of the 5500A/COIL in conjunction with a current source calibrator one can ef-
fectively multiply the current of the current source calibrator by a factor of 50 to support the calibration 
and verification of these clamp-type current meters. 
P
WARNING 
UNFUSED.  Exceeding current and voltage ratings can cause burn or fire hazard. 
Using the Coil 
Clamp-type current meters operate as current transformers, with differing degrees of magnetic coupling 
between primary and secondary that vary from meter to meter.  The position of the clamp meter with re-
spect to the cable also affects the magnetic coupling between primary and secondary of the current trans-
former, which causes variation in reading of 
the current meter.  This is important to under-
stand in order to make the most accurate and 
repeatable measurements.  The base of the 
5500A/COIL was designed so the current 
clamp can be centered carefully on the coil, 
minimizing operator error for best repeatabil-
ity.  Calibration accuracy to specifications is 
guaranteed only when proper clamp alignment 
is made.  The clamp current meter should be 
centered as much as possible on the base dur-
ing calibration and verification.  If the clamp-
type current meter has alignment marks, the 
alignment marks should align the clamp with 
the center bundled wire of the 50-Turn 
5500A/COIL.  (See Figure 1). 
®
Figure 1. Positioning the Clamp