ESAB Rustler EM 201C User Manual

10  CALIBRATION AND VALIDATION
0463 933 001
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© ESAB AB 2023
10 CALIBRATION AND VALIDATION
WARNING!
Calibration and validation should be performed by a trained service technician, possessing
sufficient training in welding and measurement technology. The technician should have
knowledge of hazards that may occur during welding and measurement and should take
necessary protective actions!
10.1 Measurement methods and tolerances
When calibrating and validating, the reference measuring instrument must use the same measuring
method in the DC range (averaging and rectification of the measured values). A number of
measurement methods are used for reference instruments, e.g. TRMS (True Root Mean Square),
RMS (Root-Mean-Square) and rectified arithmetic mean. RustlerEM uses the rectified arithmetic
mean value and should therefore be calibrated against a reference instrument using the rectified
arithmetic mean value.
In the field application it will occur that a measuring device and a RustlerEM may display different
values even though both systems are validated and calibrated. This is due to the measurement
tolerances and the method of measurement of the two measurement systems. This can result in a
total deviation up to the sum of both measurement tolerances. If the measurement method differ
(TRMS, RMS or rectified arithmetic mean), significantly larger deviations are to be expected!
The ESAB RustlerEM welding power source presents the measured value in rectified arithmetic mean
and should therefore not show any significant differences compared to other ESAB welding
equipment, due to the measurement method.
10.2 Requirements specifications and standards
RustlerEM is designed to meet the accuracy for indication and meters required by IEC/EN 60974-14,
by definition Standard grade.
Calibration accuracies of displayed value
Arc voltage ±1.5V (U
min
–U2) under load, resolution 0.25V (Theoretical measuring
range in a RustlerEM system is 0.25-199V.)
Welding current ±2.5% of I2 max according to rating plate of the unit under test,
resolution 1A. The measuring range is specified by the rating plate on
the used RustlerEM welding power source.
Recommended method and applicable standard
ESAB recommend calibration and validation to be executed according to IEC/EN60974-14 (unless
another way of execution is communicated from ESAB).

ESAB Rustler EM 201C Specifications

General

Brand	ESAB
Model	Rustler EM 201C
Category	Welding System
Language	English