Lincoln Electric LN-25 User Manual download pdf (Page 14)

LN-25

B-3

The volts marks around the HI range calibrated dial

indicate the minimum arc volts required to obtain the

indicated HI range wire feed speeds. For example;

if wire speed is set to 400 in/min., a welding

procedure arc voltage of at least 17V would be

required to obtain the 400 in/min. wire feed speed.

WORK CLIP LEAD

IMPORTANT SAFETY NOTE: To avoid possible

electrical shock, do not touch the metal portions of

the LN-25 work lead clip if the power source output

is on. The clip will be electrically “HOT” to work if the

input electrode cable to the LN-25 is electrically

“HOT” even if the gun trigger is off and even if an

internal contactor is used. Care should be taken to

only handle the LN-25 work clip by its non-metal

insulated portions and/or the welding power source

should be turned off before handling the work clip.

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The 15 ft. (4.6m) work clip lead attached to the front

panel of the LN-25 case must be connected directly

to the work using the spring clip on the end of the

lead.

If not connected, the LN-25 will not operate even if

a K431-1 or K624-1 (42V) Remote Output Control

option (refer to Accessories Section) is used.

However, the electrode will still be electrically “HOT”

when the clip lead is disconnected, if K431-1 or

K624-1 (42V) Remote Output Control Option, or

Internal Contactor (K443-2), is not used.

OPERATION

When used with a K460-1 Pulse Power Adapter Kit,

the LN-25 does not need a clip lead.

NOTE: The clip lead also serves as a work sensing

lead for the LN-25 Voltmeter (if installed). If the clip

lead is extended by the user beyond the standard

15 ft. (4.6m) length, the voltmeter reading will be

lower than the actual arc volts due to the LN-25

motor control current flowing through the resistance

of the extended lead. To minimize this voltmeter

error, the following minimum lead size is

recommended for the maximum extended lengths

shown:

AWG Maximum Length

#14 25 Ft(7.6m)

#12 50 Ft(15.2m)

#10 100 Ft(30.5m)

#6 200 Ft(61m)

REMOTE ARC VOLTAGE CONTROL (OPTIONAL)

This rheostat control allows you to control the power

source output arc voltage level. Refer to K444, K444-

1 and K444-2 Remote Voltage Kits in the

Accessories section.

GAS FITTING (OPTIONAL)

Provides gas output connection to the welding gun

for the GMAW process. Refer to K430-2 Gas

Solenoid Kit in the Accessories Section.

GAS POST PRE-FLOW TIMERS (OPTIONAL)

Allows for variable adjustment of gas pre-flow &

post-flow at the start and end of the weld. Refer to

K434-1 Gas Flow Timer Kit in Accessories Section.

WARNING

ELECTRIC SHOCK can kill.

• Do not touch metal portions

of the LN-25 lead clip when

welding power source is on.

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Lincoln Electric LN-25 User Manual Page 14

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