Miller Electric 500DX R Owner's Manual download pdf (Page 25)

OM-129 647 Page 21

5-2. Description Of Standard Controls (See Section 5-1)

 This unit has a max OCV control circuit

that resets the Amperage/Voltage Con-

trol to maximum when the arc breaks.

When an arc is struck, weld output con-

trol returns to the front panel or remote

control setting. The Amperage/voltage

Control adjusts amperage only when

welding and does not adjust open-circuit

voltage.

1 Ampere Range Switch

Use switch to select one of five ampere

ranges.

For most welding applications, use lowest

amperage range possible to help prevent arc

outages.

 Do not switch under load.

2 Amperage/Voltage Control

Control adjusts amperage within range se-

lected by Ampere Range switch. Weld output

would be 223 A DC with controls set as

shown (50% of 125 to 320 A).

3 Remote A/V Control Receptacle And

Switch

Connect optional remote control to RC3 (See

Section 4-9). Use switch to select front panel

or remote amperage control (see example

below).

4 Manual Stop Control

5 Engine Start Button

6 Ether Starting Aid Switch (Optional)

Push switch up and release while cranking

engine to release ether.

 Do not use Ether if engine is running.

To Start: Press button and use Ether switch

(if necessary). Release button when engine

starts.

Do not crank engine while engine is turning.

To Stop: Pull control out and hold. Release

control when engine stops.

7 DC Ammeter (Optional)

8 DC Voltmeter (Optional)

9 Oil Pressure Warning Light

Light goes off if oil pressure is too low.

 If light goes off, stop engine and

check oil level.

10 Battery Charging Warning Light

Light goes on when battery is not charging.

 If light goes on, stop engine and

check engine belt.

11 Engine Hour Meter

12 Polarity Switch (Optional)

S-0774 / Ref. ST-180 933-B

Example: Combination Remote Amperage Control

In Example:

Range = 125 to 320 A

Percentage Of Range = 50%

Max = 223 A DC (50% of 125 to 320)

Adjust Optional Remote ControlSet Switches Set Range Set Percentage

Max (223 A DC)

Min (100 A DC)

1 ... 24 25 26 ... 70

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Miller Electric 500DX R Owner's Manual Page 25

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