Installation and Operation
Laboratory Vacuum Ovens
5.2 Setting the Temperature
To set the temperature to the desired setpoint, complete the
following steps:
1. Press
or
until the desired
is indicated on the
bottom line of the display.
2. Press
SETIENT
to register the new setpoint.
5.3
Setting the Overtemperature Protection (OTP)
Temperature
The high limit alarm system with the temperature controller
disables the heater output. To set the alarm on the temperature
controller (typically 5°C above the desired main temperature
setpoint), complete the following steps:
1. Press and hold
SETENT
for 3 seconds, until
is displayed
on the upper line.
2. Press
or
until the desired overtemperature limit
shows on the bottom line of the display.
3. Press
SETENT
to register the new overtemperature alarm
setpoint.
4. Press and hold
SETENT
for 3 seconds to return to the normal
display.
5.4
Changing Between Celsius and Fahrenheit
The controller is factory-set to operate with degrees Celsius. To
change the display modes and parameter settings to the
Fahrenheit scale, you will need to change the Input Type
parameter
In
and also the values of various scale-dependent
parameters. If during this procedure the buttons are inactive for
more than two minutes, the controller will return to the standard
display.
To change from Celsius to Fahrenheit:
With the controller operating, access the Operating
Parameters menu by pressing and holding
SETIENT
for 3
seconds.
2. Press and release
SETIENT
repeatedly until the upper display
reads
3. Press
until the displayed value of
is -1; then press
SETIENT
to access the Setup Parameters menu (refer to
Table 2 on page
5).
4. The first setup parameter displayed is Input
(In). Press
to change its value from
5
to 35. After making this
adjustment (and all following parameter adjustments) be sure
to press and release
SETIENT
again to register the change.
5. Press and release
SETIENT
to advance to the SPH parameter
and change its value to 500.
6. Press and release
SETIENT
to advance to the SPL parameter
and change its value to 32.
7. Press and release
SETENT
to advance to the
parameter
and change its value to
1.
8. Press and hold
SETENT
for 3 seconds to exit the Setup
Parameters Menu.
9. Press and hold
SETIENT
for 3 seconds to enter the Operating
Parameters Menu and display the
parameter.
the
to set the
parameter to the desired
overtemperature limit in
11. Press and release
SETIENT
to advance to the P parameter and
change its value to 16.2.
12. Press and hold
SETIENT
for 3 seconds to exit the Operating
Parameters Menu.
13. The new temperature units are now effective. Follow the
instructions in Section 5.2 to reset the temperature
in
14. Apply the
label over the
label on the control panel.
5.5
Setting the Ramp to
Rate
The Ramp Rate feature allows the chamber to be heated or
cooled at any rate slower than the maximum capability of the
unit. To fine tune ramp rates, you may need to test using loads
with similar mass and thermal properties to loads you intend to
use in oven applications.
To set the ramp to
time, complete the following steps. If
during this procedure the buttons are inactive for more than two
minutes, the controller will return to the standard display.
1. With the controller operating, press and hold
SETIENT
for
3
seconds to enter the Operating Parameters menu.
2. Press and release
SETIENT
until the
parameter is on the
upper display.
3. Press the down arrow button to show
and press
SETIENT
once to enter the Setup Parameters menu.
4. Press and release
SETIENT
until the Upr parameter is on the
upper display.
5. Press the arrow buttons to select the new Up Ramp Rate
value, in
per minute or
per minute, or
Press and
release
SETENT
to register the value change.
6. Press and release
SETIENT
until the
parameter is on the
upper display.
7.
Press the arrow buttons to select the new Down Ramp Rate
value, in
per minute or
per minute, or
Press and
release
SETIENT
to register the value change.
8. Press and hold
SETENT
for three seconds to exit the Setup
Parameters menu.
9. The new Ramp Rates are now effective.
10. Follow the instructions in Section 5.2 to reset the temperature
setpoint.
Note:
The ramp rate begins when the
button is
pressed after the target
is selected. The
display on the controller will show the changing
at the selected ramp rate.
To view the target
during the ramp rate, press and release
an arrow button. The lower display will show the
next to
the selected target setpoint. Return to the ramping
display by pressing and releasing the other arrow button.
