HF225 manual hydraulic butt welder
Simply Better.
Simply Better.
Simply Better.
Simply Better.
FUSIONMASTER®
and
DIXON
®
are registered trademarks of Dixon Industries Pty. Ltd.
©August 2002
Revised August 2013
Page 10
5.4.
Temperature Calibration
The thermometer in the heater plate indicates the internal plate temperature not the surface
temperature, although the difference will not be great.
It is essential to check and record the
surface
temperature of the heater plate before every weld.
This is best measured with either a contact pyrometer or a non contact infrared pyrometer. The
outer circumference of the heater should not be measured as this is too far from the weld area.
The pyrometer used to measure surface temperature will itself require calibration to a procedure
as recommended by the pyrometer manufacturer.
Caution:
Be aware that an insulating air gap can form between the Teflon cloth and the hot
plate. Always ensure the cloth is forced into contact with the hot metal surface when
using an infrared or non contact pyrometer or a false reading is likely to occur. Never
use an infrared pyrometer on a shiny surface as a false reading will occur.
5.5.
Heater Non-Stick Cloth Replacement
The non-stick cloths should be replaced if they are torn, contaminated, or badly discoloured (due
to overheating) or lose their non-stick ability. Use the following procedure.
1.
Use a screw driver to lever the snap rings out of their securing grooves. This takes
very little force. Do not attempt to remove the snap rings if the plate temperature
is more than 40°C because they will not release.
2.
With the plate flat, place a new cloth into position and reposition the snap ring
over the cloth.
3.
Push the snap ring into the groove around an arc of the plate. Hold in position
with one hand. With the free hand, use a piece of wood or plastic to force the
snap ring completely into its groove. (This may take several attempts until some
experience is developed.) Never use metallic objects to force the snap rings back
into position as this may result in accidental damage to the cloth.
5.6.
Temperature Controller Failure
1.
When power is connected, one LED glows amber. When the electric element is
drawing power the other LED glows red. Either of the LEDs flashing on-off
indicates the temperature controller has failed and must be replaced.
2.
If neither LED glows when power is connected, first test the power supply and the
power cord to ensure those items are not at fault. If not faulty, next test the
element pad before replacing the temperature controller.
5.7.
Electrical safety testing heater plate
Use an appliance tester capable of performing a
Class 1 250V Run Test
to verify the functionality
of
FUSIONMASTER®
model MV70, SV70, LF110, HF225, EHF225 heater plates. These devices
cannot be safety tested either as an earthed appliance or as a double insulated appliance
because the temperature controller Is fitted with surge protection (i.e. metal oxide varistor), and
uses solid state switching that only functions when power is applied.
5.8.
Element Pad Failure
Caution: This job must be performed by a qualified electrician.
1.
Disconnect the power supply.
2.
(Refer to heater plate drawing.) Remove the screws securing the temperature
controller handle to the heater bracket, and the screws securing the bracket to
the heater plate.
3.
Remove the bracket and gasket from the heater plate to expose the temperature
sensor probe. (If the gasket is broken by this action it should be replaced.)
4.
Withdraw the sensor probe with long nose pliers, pulling on the metal case, not
the fine lead wires.
5.
Disconnect the quick connect leads from the element ends and unscrew the earth
connection and measure the resistance across the two ends of the element
