2009 by ELTRA GmbH Germany – July 2009 – Service Manual Thermostep
Page 53
h.)
Prepare the cable of the new power supply for soldering aswell.
i.)
Solder the cable of the new power supply to the one at the instrument at the right
orientation.
j.)
Plug in the cable to the new power supply.
k.)
Fasten the new power supply at the instrument.
Please note
: The screws have a definite lenght. If you have to substitute one of the
original screws make sure to get the same lenght to prevent damaging the new power
supply.
3.12
Change of flowmeter, choke, manometer
Required tools:
8 mm open-ended wrench
a.)
Unfasten the 4 x 8 mm screws that fix the front metal plate to the instrument. (see Fig.
2.2)
b.)
Hinge down the front metal plate to get free access to the gauges.
c.)
Remove the tubes of the respective gauge.
d.)
Unfasten the gauge out off its fitting.
e.)
Replace the gauge and fix the new one.
f.)
Insert the tube to the new gauge.
g.)
Close front metal plate again.
3.13
Change of a sensor
In general the replacement of the sensors works the same way. The difference between the
sensors is the form and according to this their fitting at the instrument.
The motor sensors are fixed with nuts (8mm), the caroussel sensors are fastened with screws
at their cylinders and the sensors for the cover are fixed by clamps at the cylinder.
a.)
Unfasten the sensor off its fitting.
b.)
Cut the sensor wire in an appropriate lenght and remove the insulation!
c.)
Solder in a new also prepared sensor. Remember the right orientation!
d.)
Insulate with the appropriate heat shrink tubing and fix it at its fitting.
e.)
Adjust the sensor position and fasten it again.
f.)
Check correct functionality of the new sensor.
3.14
Removal of lower heating element
Unplug instrument from electrical supply and disconnect the compressed air supply
Required tools:
2 mm Allen Key
2.5 mm Allen Key
4 mm Allen Key
5 mm Allen Key
15 cm length of Heavy Duty Cardboard Tube (for lid support)
k.)
Prop up lid using a section of heavy duty cardboard tube under the LHS pneumatic
ram arm (see Fig. 3.17).
l.)
Lift off carousels and lift out centre shaft used to lift the lids.
m.)
Remove 6 x 2 mm and 2 x 2,5 mm csk allen screws securing the stainless steel (s/s)
furnace surround (see Fig. 1.3).
