EN ISO 17657-2:2007
Current
The latest, up-to-date edition.
Resistance welding - Welding current measurement for resistance welding - Part 2: Welding current meter with current sensing coil (ISO 17657-2:2005)
20-06-2007
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Physical environment and operating conditions
5 Classification of welding current meters with
their current sensing coil, and designation
of product
5.1 Classes of welding current meter with
current sensing coil
5.2 Designation of product
6 Requirements for welding current meter with
current sensing coil
6.1 Welding current meter
6.2 Current sensing coil
6.3 Welding current meter with its current
sensing coil
6.4 Integrator
6.5 Data processing unit
6.6 Display unit and output ports
6.7 Minimum and maximum duration of welding current
6.8 Maximum measuring current
6.9 Minimum measuring current
6.10 Phase-controlled current
6.11 Minimum time for current measurement
6.12 Fluctuation of supply voltage
6.13 Mechanical strength of current sensing coil
6.14 Setting position error of current sensing coil
6.15 Influence of ambient temperature
6.16 Test
6.16.1 Type test
6.16.2 Acceptance test
7 Test procedures
7.1 Maximum measuring current
7.2 Minimum measuring current
7.3 Phase-controlled current
7.4 Minimum time for current measurement
7.5 Fluctuation of supply voltage
7.6 Thermal test
8 Marking
Annex A (normative) Definition of indicated measuring
time and its indicated current value
A.1 Indicated measuring time
A.2 Welding current value for the indicated
measuring time
Annex B (informative) Set-up of a current sensing coil
and construction of welding current meters
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