Carbolite TLD Panduan Petunjuk Pemasangan, Pengoperasian & Pemeliharaan - Halaman 4

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Halaman Cetak
TLD
3.0
O
I
PERATING
3.1
Operating Program
The program consists of the stages shown in the graph below. The rates of temperature rise, dwell
temperature and dwell times are all adjustable by the user. The general format of the program is
installed at the manufacturing stage, with initial values as shown in the table below.
2
1
function
1 Start.
2 Heat at a controlled rate.
3 Dwell for a preset period.
4 Cool at a controlled rate.
5 Dwell for a preset period.
6 Cool naturally to room
temperature.
7 Finish.
This program causes the oven to heat up at 480°C per hour to a temperature of 300°C. The
temperature remains at 300°C for 1 hour. At the end of the 1 hour the setpoint changes to 80°C
and the oven cools down as quickly as possible to this temperature. The rate of cooling is quite
fast becaue of the air inlet blower which is incorporated in the oven. When the chamber
temperature reaches 80°C the second dwell period starts and the oven remains at 80°C for 12
hours. At the end of 12 hours the heaters are switched off and the oven cools naturally to room
temperature.
3.2
Controls
The instructions for operating the temperature controller are given in a separate manual.
The oven is fitted with a combined Supply light and Instrument switch. The light is on whenever
the oven is connected to the supply. The switch cuts off power to the controller(s).
The circulation fan operates when the instrument switch is switched on.
Connect the oven to the electrical supply. The Supply light should glow .
Operate the instrument switch to activate the temperature programmer; the O position is off, the
I position on. The programmer becomes illuminated and goes through a short test cycle.
Adjust the temperature – see the controller manual.
Overtemperature Option: If the overtemperature controller has not yet been set as required, set it
and activate it according to the instructions in the appropriate manual.
The oven starts to heat up according to the set program.
4
NSTRUCTIONS
3
4
5
initial setting
heat up at 480°C/hour to 300°C
dwell at 300°C for 1 hour
Cool to 80°C assisted by inlet
blower
80°C for 12 hours
6
7
program
SEG.n 1
tGt
rAtE
SEG.n 2
SEG.n 3
tGt
rAtE
SEG.n 4
SEG.n 5
SEG.n 6
rmP.r
300°C
8°C per min
dweLL
1 hour
rmP.r
80°C
20°C per min
dweLL
12 hours
SteP
0°C
End
MF18