Chemglass CG-1972-65 - Manual (Page 13)

13
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. Setting a ramp rate will not 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.
3. 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 where you set the ramp rate in units of degrees/hour. First hold in the ‘*’ key, then while holding in the *’ key
press the ▼ or ▲ key 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 ▼ or ▲ key 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 ▼ or ▲ key 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 ▼ or ▲ key 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.