Board Configuration
The board operation is controlled through the bank of DIP Switches labeled SW1 located
on the component side of the board in the lower left corner. These switches must be set
for the cooler to operate properly. The switches numbered 1, 2, and 3 of the DIP switch
set the function of the board.
SW 1 SW2 SW3
Single Channel Cooler with communications OFF OFF OFF
Single Channel Cooler 2nd board ON OFF OFF
1st Frozen channel OFF OFF ON
nd
Frozen channel ON OFF ON
2
Dual Channel Cooler OFF ON OFF
NJ TC Display ON ON OFF
Display
Single Channel Cooler
Basic Display Description
3 digit plus sign temperature display
Temperature is displayed in tenths of °C
Green LED to display ‘Ready’ status
Green LED to display ‘Water Slip’ status
Red LED to display ‘TC Fail’ status
Detailed Display Description
The digital display shows both temperature and status of the cooler.
The display will display temperature constantly when the impinger
temperature is below the user set ‘Ready’ temperature and no other faults
are present. One fault is the ‘Water Slip’, the sensing of liquid water
downstream of the sensor, though the use of a water slip sensor. The other
fault would be a ‘TC Failure’ indicating an open thermocouple sensor.
The display will blink the temperature when impinger temperature is
above the user set ‘Ready’ temperature and no other faults are present.
The display switches every second between blank and the temperature, in
this condition.
If a ‘Water Slip’ failure is detected the display will switch between
showing the measured temperature and a symbolic “SLP”. The display
switches every second between “WS” and the temperature.
If a ‘TC Failure’ is detected the display will switch between showing
blank and the letters “tcF”.
If both a ‘TC Failure’ and a ‘Water Slip’ failure are detected the display
will switch between showing the letters “tcF” and a symbolic “SLP”.
The display switches every second between “tcF” and “SLP”.
Detailed LED Description
The LED indicators show the status of the cooler.
The top LED, which is green, will turn on when impinger temperature is
below the user set ‘Ready’ temperature.
The top LED will turn off when impinger temperature is above the user set
‘Ready’ temperature.
The middle LED, which is green, will turn on there is not a ‘Water Slip’
failure showing the system is working correctly.
The middle LED will turn off when water is detected.
The bottom LED, which is red, will turn off there is not a ‘TC Failure’
showing the system is working correctly.
The bottom LED will turn on when an open condition is detected on the
thermocouple.
The operation of the ‘Ready’ and Water Slip’ indicators changes if the
user selects the relay latching option. Once the ‘Ready’ temperature is
reached for the first time the latching option goes into effect. If an alarm
occurs after the first ‘Ready’ indication the relays will remain off until the
user supplies a contact closure to the board to reset the alarm. The LED
indicators will blink when the alarm condition has been removed but the
relay has not yet been reset.
1St Frozen
Basic Display Description
3 digit plus sign temperature display
Temperature is displayed in tenths of °C
Green LED to display ‘Ready’ status
Green LED to display ‘Valve’ status
Red LED to display ‘TC Fail’ status
Detailed Display Description
The digital display shows both temperature and status of the cooler.
The display will display temperature constantly when impinger
temperature is below the user set ‘Ready’ temperature and no other faults
are present. The fault would be a ‘TC Failure’ indicating an open
thermocouple sensor.
The display will blink the temperature when impinger temperature is
above the user set ‘Ready’ temperature and no other faults are present.
The display switches every second between blank and the temperature, in
this condition.
If a ‘TC Failure’ is detected the display will switch between showing
blank and the letters “tcF”.
Detailed LED Description
The LED indicators show the status of the cooler.
The top LED, which is green, will turn on when active impinger
temperature is below the user set ‘Ready’ temperature. Since this is a
switching system the ‘Ready’ indication is tied to the active impinger.
The top LED will turn off when the active impinger temperature is above
the user set ‘Ready’ temperature.
The middle LED, which is green, will turn on the flow control valve is on.
The valve is used to switch the flow stream between the cycling
impingers. The valve is on when the stream is flowing through the 2nd
impinger.
The bottom LED, which is red, will turn off there is not a ‘TC Failure’ for
the 1st frozen impinger only
The bottom LED will turn on when an open condition is detected on the
thermocouple.
nd
Frozen
2
Basic Display Description
3 digit plus sign temperature display
Temperature is displayed in tenths of °C
Detailed Display Description
The digital display shows both temperature and status of the cooler.
The display will display temperature constantly when impinger
temperature is below the user set ‘Ready’ temperature and no other faults
are present. The fault would be a ‘TC Failure’ indicating an open
thermocouple sensor.
The display will blink the temperature when impinger temperature is
above the user set ‘Ready’ temperature and no other faults are present.
The display switches every second between blank and the temperature, in
this condition.
If a ‘TC Failure’ is detected the display will switch between showing
blank and the letters “tcF”.
Detailed LED Description
The 2nd frozen impinger does not have any LED indication
Dual Channel Cooler
Basic Display Description
3 digit plus sign temperature display
Temperature is displayed in tenths of °C
Green LED indicate 1 channel displayed
Green LED indicate 2 channel displayed
Detailed Display Description
The digital display shows both temperature and status of the cooler.
The display can be set to constantly switch between the two channels or to
work with an external dry contact to select channel to be displayed.
The display functions the same for both channels.
The display will display temperature constantly when impinger
temperature is below the user set ‘Ready’ temperature and no other faults
are present. One fault is the ‘Water Slip’, the sensing of liquid water
downstream of the sensor, though the use of a water slip sensor. The other
fault would be a ‘TC Failure’ indicating an open thermocouple sensor.
The display will blink the temperature when impinger temperature is
above the user set ‘Ready’ temperature and no other faults are present.
The display switches every second between blank and the temperature, in
this condition.
If a ‘Water Slip’ failure is detected the display will switch between
showing the measured temperature and a symbolic “SLP”. The display
switches every second between “SLP” and the temperature.
If a ‘TC Failure’ is detected the display will switch between showing
blank and the letters “tcF”.
If both a ‘TC Failure’ and a ‘Water Slip’ failure are detected the display
will switch between showing the letters “tcF” and a symbolic “SLP”.
The display switches every second between “tcF” and “SLP”.
The single ‘Water Slip’ alarm will be displayed on both channels.
A single channel, channel 1, can be constantly displayed be selecting the
switch option in set up and omitting the switch.
Detailed LED Description
The LED indicators show the current channel being displayed.
The top LED, which is green, will turn on when channel 1 is displayed.
The lower LED, which is green, will turn on when channel 2 is displayed.
NJ Thermocouple Display
Basic Display Description
3 digit plus sign temperature display
Temperature is displayed in tenths of °C
Green LED indicate 1 channel displayed
Green LED indicate 2 channel displayed
Detailed Display Description
The digital display shows both temperature and status of the cooler.
The display can be set to constantly switch between the two channels or to
work with an external dry contact to select channel to be displayed.
The display functions the same for both channels.
The display will display temperature constantly when impinger
temperature is below the user set ‘Ready’ temperature and no other faults
are present. One fault is the ‘Water Slip’, the sensing of liquid water
downstream of the sensor, though the use of a water slip sensor. The other
fault would be a ‘TC Failure’ indicating an open thermocouple sensor.
The display will blink the temperature when impinger temperature is
above the user set ‘Ready’ temperature and no other faults are present.
The display switches every second between blank and the temperature, in
this condition.
If a ‘Water Slip’ failure is detected the display will switch between
showing the measured temperature and a symbolic “SLP”. The display
switches every second between “SLP” and the temperature.
If a ‘TC Failure’ is detected the display will switch between showing
blank and the letters “tcF”.
If both a ‘TC Failure’ and a ‘Water Slip’ failure are detected the display
will switch between showing the letters “tcF” and a symbolic “SLP”.
The display switches every second between “tcF” and “SLP”.
The single ‘Water Slip’ alarm will be displayed on both channels.
A single channel, channel 1, can be constantly displayed be selecting the
switch option in set up and omitting the switch.
Detailed LED Description
The LED indicators show the current channel being displayed.
The top LED, which is green, will turn on when channel 1 is displayed.
The lower LED, which is green, will turn on when channel 2 is displayed.
Outputs
Single Channel Cooler
The impinger temperature is available as a voltage output equal to 0.1 V / °C.
Analog out 1 is controlled by the temperature measured from thermocouple #1.
Each control board has two field replaceable relays.
Relay 1 is activated when the impinger temperature is below the user set ‘Ready’
temperature. The relay does not deactivate until the impinger temperature rises to
0.5 °C above the ‘Ready’ temperature. This hysteresis is set to avoid relay chatter
when the impinger is near the set temperature.
Relay 2 is activated when the ‘Water Slip’ sensor is dry and the system is working
properly. The relay is off when water is detected at the sensor.
Both relays have two sets of contacts. The standard factory wiring uses one set to
operate a sample pump. The second set of contacts is available for field wiring by
the user.
The relays can be selected to operate either in automatic reset or latching by the
user.
1St Frozen
The impinger temperature is available as a voltage output equal to 0.1 V / °C.
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