ESAB CIGWELD Transmig 255i, Руководство по эксплуатации, Страница: 28 / 96

OPERATING MANUAL
Transmig 255i Transmig 255i
OPERATION 4-2 Manual 0-5550
1. Power Indicator
The power indicator is illuminated when the correct mains power is applied to the power source and when
the ON/OFF switch located on the rear panel is in the ON position.
2. VRD Indicator ON/OFF Lights
A VRD (voltage reduction device) is a hazard reducing device designed to reduce electric shock hazards
present on the output of welding power source when operating in MMAW (stick) mode. Note that the
presence of VRD should not be used as a substitute for the use of appropriate safety practices as indicated
in section one of this manual.
Both the green and red indicator lights only operate in MMAW (stick) mode.
The green VRD ON light illuminates (red light is off) when the VRD is active. Under this condition the open
circuit voltage of the unit is limited to below 35V DC, thus reducing the potential of serious electric shock
(such as when changing electrodes).
The red VRD OFF light illuminates (green light is off) when the VRD is inactive. Under this condition the
output voltage of the unit will be at welding potential which in some cases may exceed 35V DC.
3. Digital Amps Meter (Left Digital Display)
MIG Mode
This digital meter is used to display the pre-set (preview) Wirefeed Speed in Meters Per Minute (MPM)
in MIG mode and actual welding amperage of the power source when welding. At times of non-welding,
the digital meter will display a pre-set (preview) value of Wirefeed Speed. This value can be adjusted by
varying the Amperage Control Knob (4).
STICK and LIFT TIG Modes
The digital meter is used to display the pre-set (preview) amperage in STICK / LIFT TIG modes and actual
welding amperage of the power source when welding. At times of non-welding, the amperage meter will
display a pre-set (preview) value in both STICK and LIFT TIG modes. This value can be adjusted by varying
the Amperage Control Knob (4).
When welding, this digital meter will display actual welding amperage in all modes.
At the completion of welding, the digital meter will hold the last recorded amperage value for a period of
approximately 10 seconds in all modes. The amperage meter will hold the value until; (1) any of the front
panel controls are adjusted in which case the unit will revert to preview mode, (2) welding is recommenced,
in which case actual welding amperage will be displayed, or (3) a period of 10 seconds elapses following
the completion of welding in which case the unit will return to preview mode.
NOTE!
The preview functionality provided on this power source is intended to act as a guide only. Some differences may be
observed between preview values and actual welding values due to factors including the mode of welding, differences
in consumables/gas mixtures, individual welding techniques and the transfer mode of the welding arc (ie dip versus
spray transfer). Where exact settings are required (in the case of procedural work), it is recommended that alternate
measurement methods be utilised to ensure output values are accurate.