J-KEM Scientific Gemini User Manual - page 15
3.4
Over Temperature Protection Circuit.
NOTE: The controller is shipped with the Over
Temperature Protection Circuit DISABLED. To
activate this circuit for either or both channels,
follow Procedure 3 below.
Both channels of the Gemini are equipped with over temperature protection circuits. This circuit turns off
heating and sounds an audible alarm if the process temperature for Channel 1 and/or Channel 2 exceeds
the set point by 5 degrees. Power remains disconnected until the Output Power Level button for that
channel is pressed. If the circuit for Channel 1 is triggered the timer window displays the message
“HELP” and the power level LED for that channel blinks. If the circuit for Channel 2 is triggered, the
power level LED for Channel 2 blinks but the display does not show the word “HELP”. The high
temperature limit (i.e. the limit that must be exceeded to trigger this circuit) is factory set to 5 degrees for
both channels, but can be changed or enabled or disabled as outlined in the procedures below. The over
temperature protection circuit for Channels 1 & 2 are independent of each other. A temperature limit
entered into the temperature meter controlling Channel 1 has no affect on Channel 2 and visa versa.
To reset a sounding alarm: 1) Correct the condition causing the alarm. 2) Press the Output Power
Level button (once) for the channel who’s power level LED is blinking.
Procedure 1.
To Change the Number of Degrees that the Reaction Temperature Must
Exceed the Set Point to Trigger the Over Temperature Alarm, Perform this Procedure.
Press and hold in both the
and
keys on the front of the temperature meter for the Channel you want to change until the word
▼
▲
“tunE” appears in the display, then release both keys.
Press the
key until “
▲
SEt.2” is showing in the display.
First hold in the ‘*’ key, while holding in the ‘*’ key press the
or
keys until the temperature limit you want is showing in the
▼
▲
display, then let go of all the keys.
Press and hold in both the
and
keys until the temperature is showing again.
▼
▲
Procedure 2.
To Permanently Disable the Over Temperature Circuit, Perform this Procedure.
Press and hold in both the
and
keys on the front of the temperature meter for the Channel you want to change until the word
▼
▲
“tunE” appears in the display, then release both keys.
Press the
key until “
▼
LEVL” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
2” is showing in the display, then let go of all the keys.
Press the
key until “
▲
SP2.A” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▼
nonE” is showing in the display, then let go of all the keys.
Press the
key until “
▼
LEVL” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
3” is showing in the display, then let go of all the keys.
Press the
key until “
▲
rEU.d” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▼
1r.2d” is showing in the display, then let go of all the keys.
Press and hold in both the
and
keys until the temperature is showing again. When you do this, the alarm will sound.
▼
▲
Increase the set point by any amount by first hold in the ‘*’ key, then while holding in the ‘*’ key press the
key.
▲
Reset the alarm by pressing the Output Power Level button once for the channel you’re changing. This completes this change.
Procedure 3.
To Enable the Over Temperature Protection Circuit, Perform this Procedure.
Press and hold in both the
and
keys on the front of the temperature meter for the Channel you want to change until the word
▼
▲
“tunE” appears in the display, then release both keys.
Press the
key until “
▼
LEVL” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
2” is showing in the display, then let go of all the keys.
Press the
key until “
▲
SP2.A” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
dU.hi” is showing in the display, then let go of all the keys.
Press the
key until “
▼
LEVL” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
3” is showing in the display, then let go of all the keys.
Press the
key until “
▲
rEU.d” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
1r.2r” is showing in the display, then let go of all the keys.
Press the
key until “
▼
LEVL” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▼
1” is showing in the display, then let go of all the keys.
Press the
key until “
▲
SEt.2” is showing in the display.
Hold in the ‘*’ key, while holding in the ‘*’ key press the
key until “
▲
5.0” is showing in the display, then let go of all the keys.
Press and hold in both the
and
keys until the temperature is showing again.
▼
▲
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