12
Important Points to Know
1. While the Ramp-to-Setpoint feature in activated, the display alternates between the current reaction
temperature and the word “
SPr
” to indicate that a “SetPoint Ramp” is active.
2. Channel 1 of this controller is equipped with a digital 100 hour timer, the digital timer and the Ramp-
to-Setpoint feature are completely independent of each other. For example, if the digital timer is set
to turn heating OFF after 5 hours, heating
is
turned off even if a ramp step is in progress. Likewise, if
a Soak time turns heating off after 3 hours and the digital timer is set to turn heating off after 10 hours,
the digital timer has no effect since the expired Soak time already has turned heating off. To avoid
confusion and conflicts between the meters “Hold” feature and the front panel digital timer, it’s
recommended that the Soak Time feature of Channel 1 be set to “––” in the meters setup menu and not
changed.
For Channel 2 Only:
It may be useful to use the “Hold” feature on Channel 2 to automatically turn
power off to the heater after a specified period of time since Channel 2 does not have a front panel
digital timer.
3. Setting a ramp rate doesn’t guarantee that the reaction temperature is at the specified ramp temperature
since heating is dependent on the power of the heater. For example, if a ramp rate of 1200 deg/Hr
(i.e., 20 deg/min) is set, unless the heater is powerful enough to impart heat at such a high rate, the
reaction temperature will not track the ramp temperature. Likewise, a reaction can’t cool faster than
natural cooling by ambient air.
4. Once the Ramp-to-Setpoint feature is activated in programming mode, it remains on until it’s
deactivated in programming mode. The Ramp-to-Setpoint feature remains activated even if power is
turned off to the controller.
Activating & Programming the Ramp-to-Setpoint Feature
1.
Press and hold in both the
and
keys on the front of the temperature meter until the word “
tunE
” appears in the
display, then release both keys.
2.
Press the
key (8 times) until the word “
SPrr
” appears in the display.
This is were you set the ramp rate in units of degrees/hour. First hold in the ‘*’ key, then while holding in the ‘*’ key
press the
and
keys until the desired ramp rate appears in the display, then let go of all the keys. Units are in
degrees/hour.
3.
Press the
key once and the word “
SPrn
” will appear in the display.
This function turns the ramping feature ON, OFF, or to Hold. First hold in the ‘*’ key, then while holding in the ‘*’
key press the
and
keys until the desired setting appears in the display, then let go of all the keys.
4.
Press the
key once and the word “
SoaK
” will appear in the display.
This is where the soak time is set in units of Minutes. A soak time of ‘ -- ‘ means to ‘soak forever’ (this setting is one
below ‘0’). First hold in the ‘*’ key, then while holding in the ‘*’ key press the
and
keys until the desired time
appears in the display, then let go of all the keys. If a soak time is set, the controller display will alternate between
showing the current reaction temperature and the word “
StoP
” when the soak time has expired to indicate that power
has been turned off.
5.
To exit programming mode, press and hold in both the
and
keys until the temperature appears in the display, then
release both keys.
Deactivating the Ramp-to-Setpoint Feature
1.
Press and hold in both the
and
keys on the front of the temperature meter until the word “
tunE
” appears in the
display, then release both keys.
2.
Press the
key (9 times) until the word “
SPrn
” appears in the display.
This function turns the ramping feature ON and OFF. First hold in the ‘*’ key, then while holding in the ‘*’ key press
the
and
keys until OFF appears in the display, then let go of all the keys.
3.
To exit programming mode, press and hold in both the
and
keys until the temperature appears in the display, then
release both keys.
