ISO 17657-2:2005 PDF

Name: ISO 17657-2:2005 — Resistance welding — Welding current measurement for resistance welding — Part 2: Welding current meter with current sensing coil
SKU: ISO 17657-2:2005
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Resistance welding — Welding current measurement for resistance welding — Part 2: Welding current meter with current sensing coil

Название (английский):

ISO 17657-2:2005

Resistance welding — Welding current measurement for resistance welding — Part 2: Welding current meter with current sensing coil

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 19 сентября 2005 г.
Издание:: ISO IS 17657 edition 1 version 1
ICS:: 25.160.10

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Описание (английский):

ISO 17657-2:2005 specifies a welding current meter with a current sensing coil to measure the weld time and the r.m.s. value of the welding current during a certain interval using single phase alternating current of frequency of 50 Hz or 60 Hz, or direct current.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 17657-2:2005 specifies requirements for a welding current meter with a current sensing coil used in resistance welding. The standard defines how to measure weld time and the r.m.s. value of welding current for single-phase alternating current (50 Hz or 60 Hz) and direct current. It applies to welding current measuring systems with a display or calibrated output port that may be connected to welding controllers for process control and quality assurance.

Key topics and technical requirements

Scope and environment

Operability at ambient temperatures of +5 °C to +40 °C, relative humidity up to 95%, and altitudes up to 1 000 m; tolerance to common welding atmospheres (dust, oil mist, spatters).

Measurement capability

Measures true r.m.s. welding current and indicated measuring time (start/finish time logic for weld-time windows).
Supports single-phase AC (50/60 Hz) and DC; cycle-based timing for AC and millisecond timing options for DC.

Accuracy and classification

Welding current meter with current sensing coil (system) classified by accuracy:
- Highly accurate: ±1.0% of full scale (laboratory use)
- Accurate: ±2.0% of full scale (routine high-accuracy systems)
- Ordinary: ±5.0% of full scale (routine systems)
Welding current meters alone have tighter meter-only classes (e.g., highly accurate ±0.5% of full scale).

Components and functionality

Current sensing coil must conform to ISO 17657-3 and match integrator conversion coefficients.
Integrator must process full-wave and heat-controlled AC without clipping/distortion.
Data processing unit: ADC, memory, CPU; algorithm must compute true r.m.s. values and store results until next measurement.
Display and outputs: pointer, digital or print-out displays for current and weld time; analog/digital output ports for waveform and data.

Testing, calibration and verification

Type and acceptance testing procedures and thermal tests are required (see Clauses 6–7).
Calibration and verification should follow ISO 17657-4 (calibration system) and ISO 17657-5 (verification).

Applications and users

Who uses it

Welding equipment manufacturers, process engineers, QA/QC personnel, calibration laboratories, and research/testing laboratories.

Practical applications

Process control and monitoring of resistance welding (spot and projection welding).
Verification and calibration of welding controllers and current sensing coils.
Ensuring repeatable weld quality and traceable measurements for production and laboratory environments.

Related standards

ISO 17657-1:2005 - Guidelines for measurement

ISO 17657-3:2005 - Current sensing coil

ISO 17657-4:2005 - Calibration system

ISO 17657-5:2005 - Verification of measuring system

ISO 669 - Resistance welding equipment - Mechanical and electrical requirements

Keywords: ISO 17657-2:2005, welding current meter, current sensing coil, resistance welding, weld time, r.m.s. value, welding current measurement, measurement accuracy, integrator, calibration.

ISO 17657-2:2005 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 17657-1:2005

Resistance welding — Welding current measurement for resistance welding — Part 1: Guidelines for measurement

ISO 17657-3:2005

Resistance welding — Welding current measurement for resistance welding — Part 3: Current sensing coil

ISO 17657-4:2005

Resistance welding — Welding current measurement for resistance welding — Part 4: Calibration system

ISO 17657-5:2005

Resistance welding — Welding current measurement for resistance welding — Part 5: Verification of welding cur…

BS EN ISO 17657-3:2007

Resistance welding. Welding current measurement for resistance welding. Current sensing coil.

SIST EN ISO 17657-4:2007

Resistance welding - Welding current measurement for resistance welding - Part 4: Calibration system (ISO 176…

SIST EN ISO 17657-5:2007

Resistance welding - Welding current measurement for resistance welding - Part 5: Verification of welding cur…

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