CIGWELD Transmig 310 - Controls - Digital Meter; Controls - Welding Terminals

Transmig 210, 250, 310, 330
DOC No: MIGTRN0001 Page 17 of 31
Issue No: 2 Date: 14/09/98
6.3 Digital Ammeter and Voltmeter (Standard for Transmig 330 Only)
Where fitted an average reading ammeter and voltmeter is provided to allow accurate monitoring
(5% tolerance) of welding current and voltage. Refer to section 9.1 on page 25 for the Improved
Current Accuracy Calibration Procedure for the Digital Meter.
The Digital Meter will display both welding current and voltage. To toggle between the current and
voltage readings depress the push button switch mounted below the meters display. See Figure 9 for
an example of current and voltage displays.
Value displayed for 157 Amp Value displayed for 23.4 Volts
Figure 9 - Examples of the digital read outs
6.4 Torch Polarity Lead (Compact Models Only)
This lead selects the welding voltage polarity of the electrode wire. Plug it into the positive welding
terminal ( + ) when using steel, stainless steel or aluminium electrode wire. Plug the Torch Polarity
Lead into the negative welding terminal ( - ) when using gasless electrode wire. If in doubt, consult
the manufacturer of the electrode wire for the correct polarity.
6.5 Positive and Negative Welding Terminals
Welding current flows from the Power Source via heavy duty bayonet type terminals. It is essential,
however, that the male plug is inserted and turned securely to achieve a sound electrical connection.
WARNING 5: Loose welding terminal connections can cause overheating and result in the
male plug being fused in the bayonet terminal.
6.6 Wirefeeder Control Socket (Remote Wirefeeder Models Only)
This socket accepts the male plug on the control cable from the Wirefeeder. The male plug should
be fully inserted into the control socket then locked into position by turning the retaining ring on the
male plug in a clockwise direction.
6.7 Thermal Overload
The critical component for thermal protection is the rectifier stack, which is fitted with a thermal
overload cutout device. If the overload operates then the machine should be left to cool for
approximately 15 minutes before resuming welding. There will be no danger of transformer damage
if the Power Source is operated within its duty cycle, refer to section 1.1 for an explain of duty cycle
and section 2 for the Power Source specifications.