Tweco 186 DC Inverter - Manual (Page 39)

Manual 0-5237 3-9 INSTALLATION, OPERATION AND SETUP
INSTALLATION/SETUP 186 AC/DC INVERTER
15 Pulse Button
Press the PULSE button to toggle Pulse On and OFF in LIFT TIG and HF TIG modes
16. Programming Parameter Indicators (Front Panel Display Indicators)
The Front Panel LED indicators serve two purposes. First, they show what process and what parameter is
selected and the value of that parameter. The AMP DISPLAY shows only amperage values measured in AMPS,
the VOLT DISPLAY can indicate Voltage, Time, Percentage, or Frequency. The UNITES lights indicate the unit
of measurement for the reading on the VOLT DISPLAY: Volts (V), Seconds (SEC), Percent (%),Hertz (HZ). Only
the parameters that are applicable to a specific PROCESS, MODE, or TRIGGER SELECTION will light when
using the FORWARD or BACK programming switches. Secondly, during the welding process, the following
sequence indicators will light to indicate the specific phase of the weld process which is active:
TIG STICK
PREFLOW WELD CURRENT
HOT START
INITIAL CURRENT (4T)
UPSLOPE (4T)
WELD CURRENT (PULSING OFF)
HIGH CURRENT (PULSING ON)
LOW CURRENT (PULSING ON)
DOWNSLOPE
CRATER CURRENT (4T)
POST FLOW
17. Mode Button
Press the MODE button to toggle AC and DC output in all Process modes
18. Digital Ammeter
The digital amperage meter is used to display both the pre-set current and actual output current of the power
source.
At times of non-welding, the amperage meter will display a pre-set (preview) amperage value. This value can
be adjusted by varying the multifunction control when the Programming Parameter Indicator light shows
WELD CURRENT .
When welding, the amperage meter will display actual welding current.
Should a remote device be connected the maximum setting of the power source will be determined by the
respective front panel control, irrespective of the remote control device setting. As an example, if the output
current on the power source front panel is set to 50% and the remote control device is set to 100%, the
maximum achievable output from the unit will be 50%. Should 100% output be required, the respective power
source front panel control must be set to 100%, in which case the remote device will then be able to control
between 0-100% output.
19. Digital Voltmeter / Parameter meter
The digital volt meter is used to display the actual output voltage of the power source. It is also used to display
Parameters in Programming Mode.
Depending on the Programming Parameter selected, the status indictor adjacent to the volt meter will illuminate
to show the units of the programming parameter.
When welding, the volt meter will display actual welding voltage.