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External Temperature
Thermo Scientific
Connect the external sensor to the male 9-pin D-connector located on the
rear of the chiller, see previous page.
Sensor
The external temperature sensor is enabled using the controller. With the
controller displaying the temperature press
alternates with
keys to change the status and then press
display.
If the external sensor is selected the controller displays the temperature
at the external sensor. Also, the controller indicates the external sensor is
selected by flashing the left-most temperature decimal point.
NOTE To display the internal temperature press and hold
second. The display indicates
internal temperature for five seconds. The display then indicates
for ½ second and returns to the external temperature. The
to be released and then pressed and held again to repeat the cycle. To
display the remote probe temperature deviation use the Setup/Tuning
Loop, see Chapter 2.
The controller continues to use the existing setpoint. When using the
external sensor the controller will not allow internal chiller temperatures
outside -17°C to 37°C.
The selected sensor is retained by the controller if it is turned off, or if
power is removed.
If there is an external sensor error the chiller automatically returns to the
internal sensor. An error code flashes and if the fault mode is on the
chiller shuts down. See Error Codes in Chapter 4. Press
chiller.
The external probe can be used to control the high and low temperature
monitors using the Setup/Tuning Loop, see Chapter 2.
NOTE If you also need to monitor status while using the external sensor,
an optional Y-connector cable is available from Thermo Fisher.
and either
Flashes to indicate the
external sensor is
enabled.
five times. The display
or
. If desired, use the arrow
to return to the temperature
for ½ second and then displays the
Chapter 3
for one
key needs
to restart the
Merlin
3 - 3
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