Turning The Welding Unit On; Connecting The Fitting; Entering Voltage And Time; Starting The Welding Process - Hürner HST 300 Manual USB 2.0 Manuel Utilisateur

• Be sure that power supply/generator protection is 16 A (slow
blow).
• Plug the power supply cord into the mains power supply or the
generator.
• Read and comply with the User's Manual of the generator, if ap-
plicable.
5.1

Turning the Welding Unit on

After connecting the power supply cable to mains power or a gen-
erator, turn the welding unit on using the On/Off switch. This causes
Display 1 to show.
Then the screen changes to Display 2.
CAUTION in case of System Errors!
If during the auto-test that the unit performs at start-up, an
error is detected, a "System Error" message shows on the
display. When this happens, the welding unit has to be discon-
Caution
nected immediately from the power suppy and the fitting,
and it has to be shipped to the manufacturer for repair.
5.2

Connecting the Fitting

Connect the connection terminals to the fitting and check for proper
contact. Use terminal adapters if needed. The contact surfaces of the
cable connection terminals or adapters and the fitting have to be clean.
Dirty terminals may lead to improper welding and also to overheated
and fused connection terminals. Protect the cable connectors against
getting dirty at all times. Terminals and push-on adapters should be
considered consumables and, therefore, have to be checked before
every welding operation and replaced if damaged or dirty.
When the fitting is connected, the "No Contact" message (see Dis-
play 2) disappears.
5.3

Entering Voltage and Time

After the fitting was connected, Display 3 appears on the screen.
Use the ñ, ò, ï, ð arrow keys to set the voltage and the time for the
welding process according to the fitting manufacturer's instructions,
then press the START/SET key to confirm your input. The "Start ?" mes-
sage indicates that the welding unit is ready to start welding.
5.4

Starting the Welding Process

After entering the welding parameters, the welding process can be
started using the START/SET key, when the "Start ?" message is dis-
played and there is no indication of a problem.
Pressing the START/SET key will trigger a confirmation message "Pipe
treated?," which in turn requires a confirmation with the START/SET
key to start the welding proper.
5.5

Welding Process

The welding process is monitored for its entire duration applying
the appropriate welding parameters. The welding voltage, the resis-
tance, and the welding current are displayed in the lower line of the
screen.
8
EN
HÜRNER HST 300 Manual USB 2.0 User's Manual
H Ü R N E R S c h w e i s s t e c h n i k G m b H
Nieder-Ohmener Str. 26
35325 Mücke, Germany
********************
HUERNER
HST300 Manual 2.0USB
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Connect Fitting
14:32:11
Inp.Volt. 230V
No Contact
Voltage/Time
U= 35 V
Version February 2014
Display 1
21.10.12
50Hz
Display 2
t= 90 s
Display 3