10
Section 3:
Operations Guide
3.1
Front Panel Description.
The Gemini controller has two independent temperature controllers in a single cabinet. The two
controllers are labeled Channel 1 and Channel 2. The controls for Channel 1 have no affect on the
operation of Channel 2 and visa versa.
Controls for Channel One
1
2
3
4
5
6
7
8
9
Controls for Channel Two
10
11
12
13
14
15
16
1. Channel 1 Temperature Display. Shows the temperature of
the process connected to Channel 1 as the default display.
Shows the setpoint temperature (i.e. desired temperature)
when the ‘*’ button is held in.
2. Control Key When pressed, the display shows the set
point temperature. To decrease or increase the set point,
press the
key (3) or
key (3), while simultaneously
pressing the control key. The set point appears as a
blinking number in the display.
3. Down/Up Key Lowers or raises the setpoint when ‘*’
button (2) is simultaneously pressed.
4. On/Off Switch.
WARNING:
Due to the nature of solid
state relays, a small amount of output power (7.5 mA @
120 VAC; 0.9 watts) is present at outlet (8) even when the
controller is turned off. Take appropriate precautions to
avoid electrical shock.
5. Channel 1 Power Level. This knob is the interface to J-
KEM’s patented power control computer which limits the
maximum power delivered to the heater. See Sections 3.6
and 4.1.
6. Timer Display. Indicates the status of the timer. See
Section 3.5 for timer operation instructions.
7. Timer Mode Selector. Sets the operating mode of the
timer. See Section 3.5 for timer operation instructions.
8. Channel 1 Power Outlet. Plug only 120 VAC devices into
this outlet (see Section 3.2).
9. Channel 1 Temperature Sensor Input. Use the same type of
sensor probe as the sensor plug installed on the controller
(see Section 3.7). The correct sensor type will have the
same color plug as the input (9) on the front of the
controller.
10. Channel 2 Temperature Display. Shows the
temperature of the process connected to Channel 2 as
the default display. Shows the setpoint temperature
(i.e. desired temperature) when ‘*’ button is held in.
11. Control Key When pressed, the display shows the set
point temperature. To decrease or increase the set
point, press the
key (12) or
key (12), while
simultaneously pressing the control key. The set point
appears as a blinking number in the display.
12. Down/Up Key Lowers or raises the setpoint when ‘*’
button (11) is simultaneously pressed.
13. Channel 2 Power Level. This knob is the interface to
J-KEM’s patented power control computer which
limits the maximum power delivered to the heater.
See Sections 3.6 and 4.1.
14. On/Off Switch.
WARNING:
Due to the nature of
solid state relays, a small amount of output power (7.5
mA @ 120 VAC; 0.9 watts) is present at outlet (16)
even when the controller is turned off. Take
appropriate precautions to avoid electrical shock.
15. Channel 2 Temperature Sensor Input. Use the same
type of sensor probe as the sensor plug installed on the
controller (see Section 3.7). The correct sensor type
will have the same color plug as the input (15) on the
front of the controller.
16. Channel 2 Power Outlet. Plug only 120 VAC devices
into this outlet (see Section 3.2).
