K2 Scientific Dixell XR60CX User manual

Dixell XR60CX Operating Manual
IMPORTANT:
Your unit is preprogrammed
Place your unit in the desired location. Plug the unit in and allow it to cool and become stable for a minimum
of 24 hours before logging temperature or stocking products.
Be careful when setting or changing temperatures
WARNING: Changing some controller parameters can damage your unit and/or result in a loss of product. K2
will not be held responsible for losses due to unauthorized parameter changes.
Changing advanced parameters may damage the unit or void your warranty.
Please contact K2 before attempting to change advanced parameters.
Unfamiliar with the operation of a K2 controller?
Use the video tutorials on our website resources page or call us for assistancee with special parameters.
Some K2 units can be changed from Celsius to Fahrenhiet. We do not recommend changing your
unit to Farhenheit. Your controller has operational parameters that rely on data in Celsius to maintain
proper function.
Thank you for your purchase.
This manual contains: set-up instructions, unit specs, safety information,
controller operation and maintenance steps.
K202, K204, K210
11.16.2020

Dixell Operating Manual
CONTENTS
1. Front Panel Commands
2. Parameters
3. Alarm Signalling
4. Default Setting Values
1 Front Panel Commands - QUICK GUIDE
This key displays your target set point. When in
programming mode, it conrms an opperation.
This key starts a manual defrost
In programming mode, this key browses
parameter codes or increases display value.
In programming mode it browses the
parameter codes or decreases the displayed
value
Key Combination
To lock or unlock the keyboard
To enter in programming mode
To return to room temperature display
5. How to Use the Hot Key
6. Fans
7. Defrost
8. Temperature Logging
Meaning
Basic Parameters
How to see the set point
1. Push and immediately release the SET key,
the set point will be shown.
How to change the set point
1. Push the SET key for 3s to change the set point value;
2. The value of the set point will be displayed and the
°C or °F LED starts blinking;
3. To change the set values push the or arrows.
4. To save the new set point value push the SET key
again or wait 10s.
How to start the a manual defrost
Push the DEF book for 3s and a manual defrost
will start.
Advanced Parameters
1. Enter the Programming mode by pressing the
keys for 3s (°C or °F LED starts blinking).
2. Release the keys, then push again the
keys for more than 7s. The L2 label will be displayed
immediately followed from the Hy parameter.
(NOW YOU ARE IN THE PROGRAMMING MODE)
3. Select the required parameter.
4. Press the SET key to display its value
5. Use or to change its value.
6. Press SET to store the new value and move to the
following parameter.
To Exit: Press or wait 15s without pressing a key.

2 Parameters - How to change a parameter value
Changing advanced parameters may damage the
unit void your warranty. Please contact K2 before
attempting to change advanced parameters.
Regulation
US Maximum SET POINT: Set the maximum value for set point.
ot First probe calibration: Allows to adjust possible offset of
the rst probe.
P2 Evaporator probe presence: n= not present; y= the defrost
stops by temperature.
oE Second probe calibration: Allows to adjust possible offset
of the second probe.
od Outputs activation delay at start up: This function is
enabled at the initial start up of the instrument and inhibits
any output activation for the period of time set in the
parameter.
AC Anti-short cycle delay: Minimum interval between the
compressor stop and the following restart.
Cy Compressor ON time with faulty probe: Time during
which the compressor is active in case of faulty thermostat
probe. With Cy=0 compressor is always OFF.
Cn Compressor OFF time with faulty probe: Time during
which the compressor is OFF in case of faulty thermostat
probe. With Cn=0 compressor is always active.
Defrost
td Defrost type: EL= electrical heater, compressor OFF; in= hot
gas, compressor ON.
dE Defrost termination temperature: If P2=Y it sets the
temperature measured by the evaporator probe, which
causes the end of defrost.
id Interval between defrost cycles: Determines the time
interval between the beginning of two defrost cycles.
Md Maximum length for defrost: When P2=n, (not evaporator
probe: timed defrost) it sets the defrost duration, when P2 =
y (defrost end based on temperature) it sets the maximum
length for defrost.
dd Start defrost delay: This is useful when different defrost
start times are necessary to avoid overloading the plant.
dF Display during defrost: rt= real temperature; it= start
defrost temperature; SP= SET-POINT; dF= label dF.
dt Drip time: Time interval between reaching defrost
termination temperature and the restoring of the control’s
normal operation. This time allows the evaporator to
eliminate water drops that might have formed due to defrost.
dP Defrost at power –on: y= at power on defrost starts; n=
defrost doesn’t start at power-on.
Display
CF Measurement unit: °C =Celsius; °F =Fahrenheit.
WARNING: When the measurement unit is changed
the SET point and the values of the parameters Hy, LS,
US, oE, o1, AU, AL have to be checked and modied if
necessary.
rE Resolution (only for °C): dE= decimal between -9.9 and
9.9°C; in= integer
Ld Default display: P1= thermostat probe; P2= evaporator
probe. SP=Set point (only XR04CX)
dy Display delay: When the temperature increases, the display
is updated of 1 °C/1°F after this time.
Fans
FC Fans operating mode: (cn, on, cY, oY) cn= in runs with the
compressor, OFF during defrost;
on= Continuous mode, OFF during defrost; cY= runs with the
compressor, ON during defrost.
oY= Continuous mode, ON during defrost.
Fd Fans delay after defrost: (0÷99 min) Interval between end
of defrost and evaporator fans start.
FS Fans stop temperature: (-55÷50°C / -67°F ÷ 99°F) setting of
temperature, detected by evaporator probe, above which
fans are always OFF.
Alarms
AU Maximum temperature alarm: When this temperature is
reached the alarm is enabled, after the “Ad” delay time.
AL Minimum temperature alarm: When this temperature is
reached the alarm is enabled, after the “Ad” delay time.
Ad Temperature alarm delay: Time interval between the
detection of an alarm condition and alarm signalling.
dA Exclusion of temperature alarm at startup: Time interval
between the detection of the temperature alarm condition
after instrument power on and alarm signalling.
Digital Input
iP Digital input polarity: oP= activated by closing the contact;
cL= activated by opening the contact;
iF Digital input conguration: EA= external alarm: “EA”
message is displayed; bA= serious alarm “CA” message is
displayed; do= door switch function; dF= defrost activation;
Au= not used; Hc= inversion of the kind of action;
di Digital input delay: With iF=EA or bA delay between the
detection of the external alarm condition and its signalling.
With iF=do - delay to activate the door open alarm.
dC Compressor and fan status when open door: no= normal;
Fn = Fans OFF; cP =Compressor OFF; Fc = Compressor and
fans OFF.
rd regulation with door open: n = no regulation if door is
opened;Y= when di is elapsed regulation restarts even if door
open alarm is present.
1. Enter the programming mode by pressing keys for 3s. (°C or °F LED starts blinking)
2. Use the up and down keys to select the required parameter. Press the SET key to display its value.
3. Use or to change its value.
4. Press SET to store the new value and move to the following parameter using the up and down arrows.
To Exit: press or wait 15s without pressing a key.
Dixell Operating Manual

3 Alarm Signaling
Alarm Recovery
Probe alarms “P1” and “P2” start some seconds after the fault in the related probe;
they automatically stop some seconds after the probe restarts normal operation. Check
connections before replacing the probe. Temperature alarms “HA” and “LA” automatically
stop as soon as the temperature returns to normal values. Alarms “EA” and “CA” (with iF=bL)
recover as soon as the digital input is disabled.
4 Default Setting Values
Dixell Operating Manual
Code

5 How to Use the Hot Key
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and
push key; the “uP” message appears followed a by
ashing “Ed”.
3. Push “SET” key and the “Ed” will stop ashing.
4. Turn OFF the instrument remove the “Hot Key,”
then turn it ON again.
NOTE: the “Er” message is displayed for failed
programming. In this case push again key if you
want to restart the upload again or remove the “Hot
key” to abort the operation.
Programming the Hot Key
1. Turn OFF the unit.
2. Insert a programmed “Hot Key” into the 5 PIN
receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is
downloaded into the Controller memory, the “do”
message is blinking followed a by ashing “Ed”.
4. After 10 seconds the instrument will restart working
with the new parameters.
5. Remove the “Hot Key”.
7 Defrost Two defrost modes are listed through the “td” parameter.
• td=EL Defrost through electrical heater (compressor OFF)
6 Fans
•FC=cn Will switch ON and OFF with the compressor
and not run during defrost.
• FC=on Fans will run even if the compressor is off, and
not run during defrost.
After defrost, there is a timed fan delay allowing for drip
time, set by means of the “Fd” parameter.
• FC=cy Fans will switch ON and OFF with the
compressor and run during defrost.
• FC=oY Fans will run continuously also during defrost.
An additional parameter “FS” provides the setting of
temperature, detected by the evaporator probe,
above which the fans are always OFF. This is used to make
sure circulation of air only if his
temperature is lower than set in “FS”.
Fans and Digital Input
When the digital input is congured as door switch iF=do,
fans and compressor status depends on the dC parameter
value:
• dC=no normal regulation
• dC=Fn fans OFF
• dC=cP compressor OFF
• dC=Fc compressor and fans OFF
When rd=y, the regulation restart with door open alarm.
Dixell Operating Manual
Service
K2 Scientific want to make sure you are happy with your purchase. There are several ways for you
to contact us with questions or service needs. Be sure to include your four digit order number or at
least your model number handy to speed up the process.
1; Contact us via our chat feature at www.k2sci.com
2: Email [email protected]
3: Call 800-218-7613
8 Temperature Logging
When storing vaccines you may be required to preform a eld validation test. A NIST callibrated external
data logger may be used for this purpose. A dayta logger with text, email or online access is an added layer
of protection for your product load in the event of a temperature excursion. K2 offers NIST calibrated data
loggers to match your unit.