WS-1510ELPM - Auberins.com

Operation Instruction Manual
WS-1510ELPM
Precision PID Temperature Controller
Version 1.3 (October, 2015)
Auber Instruments
5755 North Point Parkway, Suite 99
Alpharetta, GA 30022
770-569-8420
www.auberins.com
Introduction
Thank you for shopping the Auber WS series temperature controller. We sincerely appreciate
your decision and trust that our controller will meet your expectations in both the quality of the
result and the value of the product. While we are delighted that you may be anxious to operate
the controller, please still spend a few minutes reading through this manual because this will
serve to enhance your experience in the months and years ahead. In particular, we urge you to
read through the safety warnings below. Although this plug-and-play controller is very easy to
use, the process involves high temperature and high wattage appliances and your safety is
paramount.
SAFETY WARNINGS



This controller is designed only to be used with limited-power device and paring thermal
cutoff protection such as a thermostat or thermal.
Do not place any objects on the top of controller surface because that may prevent
venting excess heat during its operation.
The controller can handle a maximum current up to 15 Ampere. For 120 VAC in US or
Canada, this limits the heater power to 1800 watts. Due to its compact size and the
splash proof design for kitchen applications, the controller has a limited ability to dissipate
the heat generated by the internal solid state relay during the initial heat up. The initial full
power heat up process cannot be more than 90 minutes. If you system need take longer
time to warm up, please read Appendix 1 “Managing the heat generated by the
controller”
1





Always place the sensor in the controlled subject when the controller is on. Before
turning on the controller, please make sure the sensor is placed inside the container to be
controlled. Leaving the sensor outside will form an open loop operation. If the sensor is
left outside, the controller will assume the temperature is low even if the controlled
subject is already very hot. The controller will provide full power to the heater. It will not
only overheat the controller, but also damage your appliance or even cause a fire. If the
sensor is not permanently mounted on the system and left outside of the system, there is
a potential problem. You should enable the open loop alarm function (see page 11 for
details).
This controller is designed to control the devices recommended by Auber Instruments
only. Using it to control a not recommended device can be dangerous and even cause fire.
Auber Instruments is not liable for damages caused by misuse of the controller. If you are
not sure the controller can be used, please contact Auber Instruments before usage.
If an abnormal display or noise is observed, turn the controller off, unplug the power cord
and contact the manufacturer before using it again.
Clean the controller only when it is cool and unplugged.
Do not allow children to operate the controller.
Specifications
Input voltage:
Output voltage:
Maximum Current:
Fuse Size:
Control Action:
Control Mode:
Output switching device:
Sensor type:
Sensor tip dimensions:
Sensor cable length:
Alarm:
Timer Range:
Temperature resolution:
Temperature display range:
Temperature accuracy:
Dimension (W x H x D):
Weight:
Warranty:
100 to 240 VAC 50 /60 Hz.
The same as input voltage.
15A at 120V, 12A at 240V
15A fast blow fuse.
Heating (reversed action) or cooling (direct action)
PID, PI, PD, P or on/off.
Built-in optically isolated solid state relay (SSR) with zero
voltage crossing switching.
Three-wire Pt100 RTD sensor.
4 mm diameter x 50 mm long.
6 ft (915 mm).
High limit alarm and open loop alarm with LED and buzzer.
1 to 9999 minutes for each step. 6 steps total.
1 °C or 1 °F.
-50 to 400 °C or -58 to 752 °F.
±1°C (±1°F).
6 x 3 x 8.3 inch (155 x 80 x 210 mm).
3.2 lb (1.5 kg).
1 year for controller. 90 days for sensor
2
Operating Instructions
1. Controller
Figure 1. Front Panel.
The front panel of the controller is shown in Figure 1. The function of each item is described
below:
(1) Parameter Window (LED) - For displaying temperature values and controller's system
parameters.
(2) Output status indicator - In normal mode, this LED indicates the heater status. When it is on
(lit), the heater is powered. When it is off, the heater power is off. When it is flashing, it means the
heater is on and off intermittently to reduce the power output. It should be synchronized with the
power light on the cooking device.
(3) SET Key - For showing current temperature settings, entering parameters setting mode and
confirming various actions taken.
(4) “+” Key - To increase the value at parameter setting mode; toggle LED display between the
current temperature and the current step number at normal operating mode.
(5) “-” Key - To decrease the value at parameter setting mode.
(6) Time Key - To toggle the LED display between the current temperature and the total running
time at the normal operating mode.
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(7) Alarm indicator - Lit when the alarm is on.
(8) Timer status indicator – Lit when Time key is pressed.
(9) Editing indicator – A dot at the lower right corner. When the dot flashing, the value is
editable; pressing the “+” or “-“ key to change the value.
The layout of the controller back panel is shown in Figure 2.
Figure 2. Back Panel.
2. Connecting the controller
Figure 3. Typical connection between the controller and the device (in this example it is a
cooker).
4
A schematic wiring diagram of the controller and the device to be controlled is shown in Figure 3.
The connection of the controller with the device and the sensor should be done with the following
steps:
 Plug the sensor into the sensor port on the back of the controller.
 Plug the power cord from controller into the power outlet.
 Flip the power switch to turn on the controller. The LED display will show “8.8.8.8.” for 2
seconds and then display the current temperature. Then turn off the controller.
 Plug the power cord from the device (heater/cooker/smoker) to the output socket on the
back of the controller. If the load has a power switch, please make sure the switch is in
“off” position.
 Place the sensor inside the camber or container to be controlled.
 Turn on the controller.
 Turn on the device.
Remark: The connector of sensor contains a slot for pin-connect alignment. It also has a spring
lock to prevent disconnections from accidental pulling on the cable. The following pictures show
how to install and remove it.
Figure 3. How to install the sensor.
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Figure 4. How to remove the sensor.
3. Programming the temperature profile.
A total of 6 steps can be programmed for this controller. Each step contains the temperature (C-X)
and time duration (t-X) setting. They are represented by the symbol C-X and t-X, where “X” is the
step number (e.g. temperature value of Step 4 is represented by C-4 and time value of step 4 is
represented by t-4). The character, “t”, is displayed as the symbol, “T”. Time is defined as the
duration between the last step and the next step. Please make sure the time is long enough for
the heater to heat up the oven. If the time is set too short, the temperature may not be able to
reach set temperature, before it jumps to the next step. The time unit is in minutes with 1 minute
resolution. If the recipe only needs one step, you can program the time of the rest of the steps to
zero.
To program the temperature profile, press SET key once. The display will show C-1 for one
second and then display the temperature setting for step 1. Use “+” and “-” keys to change the
setting. When finished, press the SET again to confirm the change. The display will show t-1 for a
second and then change to the time setting for step 1. Use “+” and “-” keys to change the setting.
When finished, press the SET again to confirm the change. The display will go to the step 2
setting. The following is the flow chart (Figure 6) for the setting procedure.
The temperature setting will not be changed if SET key is not pressed (confirmed). After
programming the necessary cooking steps, you can finish programming by pressing the SET
repeatedly until the display passes t-6 and displays the current temperature. You can also leave
the controller alone. The display will return to the normal display mode if no key is pressed within
15 seconds.
6
080
SET
C-1
120
SET
SET
T-1
20
SET
SET
C-2
190
SET
SET
T-2
20
SET
SET
C-3
130
SET
SET
T-3
300
SET
SET
T-6
0
SET
SET
Figure 5. Temperature profile programming flow chart.
Here is the one step heating program. The temperature profile is programmed to start at 150 °F
for 600 minutes of heating.
Table 1. Initial program setting.
Step #
C-1
C-2
C-3
C-4
C-5
C-6
Temp
(F)
150
0
0
0
0
0
Step #
t-1
t-2
t-3
t-4
t-5
t-6
7
Time
(min)
600
0
0
0
0
0
4. Checking the current step and the time
The user can check step number, total running time, and the time in the current step using the
“Time” or “+” key. Please see the flow chart in Figure 7.
Time
Current temp.
reading
080
+
Press
once
Current step
P-1
Total operating time
since power up
10
Press
once
+
Press
once
Time
P 2
Press
once
Operating time
on current step
Figure 7. How to check current step and the time.
At normal operating mode, press the “+” key (item 4 in Figure 1) to toggle the display window
between the current temperature and the current step number at which the program is running
(P-X). At time displaying mode, press the “Time” key to toggle the display between the total time
(in minutes) since the controller was powered up and the time past in the current step. For
example, the controller has being running for 100 minutes in total, but currently it is at step 2 for
40 minutes. So when you first press “+” key, controller will show “P-2” in the window. If then you
press “Time” key, the controller will show “P 40” with the Time Indicator lit.
At normal operating mode, press the “Time” key (item 6 in Figure 1) once to toggle the LED
window between the current temperature and the total time (in minutes) since the controller was
powered up. The Time Indicator (item 8 in Figure 1) will lit at same time. When the time is being
displayed, press the “+” key will toggle the display between the total running time and the running
time of the current step. For example, the controller has being running for 100 minutes in total,
but currently it is at step 2 for 40 minutes. So when you first press “Time” key, controller will show
“100” in the window with the Time Indicator lit. If then you press “+” key, the controller will show
“P 40” while the Time Indicator still lit.
5. System configuration parameters
This section discusses how to configure the controller for a specific application. For most sous
vide cooking users, there is no need to read this section. The controller’s default setting is for
most common configurations of sous vide cooking.
5.1 The first group of parameter is related to the control performance. They need to be
adjusted based on your application. Table 2 shows the list of these parameters, their range and
initial set value.
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Table 2. List of control parameters and its initial settings under code 166.
Symbol Display
Description
Range
P
P
Proportional Band
0-9999
I
I
Integral Const. (Sec.)
0-9999
d
d
Derivative Const. (Sec.)
0-9999
AT
AT
Auto-tune
0=off, 1=on
t
T
Cycle Rate (Sec.)
2-9999
Initial
7
600
150
0
2
Details about each parameter
 P, Proportional band. It is in 1 degree units. This parameter controls the output of the
controller based on the difference between the measured and set temperatures. The
larger the P number means the weaker the action (lower gain). For example, if P=7, the
proportional band is 7 degrees. When the sensor temperature is 7 degrees below the
proportional band (7 degrees below the setting), the controller will have 100% output.
When the temperature is 5 degrees below the set point, the output is 71%. When the
temperature is equal to the setting, the controller will have 0% output (assuming integral
and derivative functions are turned off). This constant also affects both integral and
derivative action. Smaller P values will make both integral and derivative action stronger.
Please note the value of the P is temperature unit sensitive. If you found an optimized P
value when operating the controller in Fahrenheit, you need to divide the P by 1.8 when
changing the temperature unit to Celsius.
ON/OFF mode. If P is set to 0, the control mode will be changed from PID mode to
ON/OFF mode. ON/OFF mode should be used for controlling an external relay, a
solenoid valve, or a compressor of freezer. You also need to set the hysteresis band
(dead band) for the on/off mode. In the on/off mode, Integral and Derivative parameters
are not valid.

I, Integral time. The unit is in seconds. This parameter controls the output of controller
based on the difference between the measured and set temperature integrated with time.
Integral action is used to eliminate temperature offset. Larger number means slower
action. e. g. assuming the difference between the measured and set temperature is 2
degrees and remain unchanged, the output will increase continuously with time until it
reaches 100%. When temperature fluctuate regularly (system oscillating), increase the
integral time. Decrease it if the controller is taking too long to eliminate the temperature
offset. When I=0, the system becomes a PD controller. For very slow response system
such as slow cooker and large commercial rice cooker, set I = 0 will significantly reduce
the temperature overshoot.
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
d, Derivative time. The unit is in seconds. Derivative action contributes the output power
based on the rate of temperature change. Derivative action can be used to minimize the
temperature overshoot by responding its rate of change. The larger the number is, the
faster the action will be, e.g. when the door of oven is opened, the temperature will drop
at very high rate. The derivative action change the controller output based on the rate of
change rather than the net amount of change. This will allow the controller to act sooner.
It will turn the heater to full power before the temperature drops too much.

AT, Auto-tuning. Every type of cooker has its own unique set of tuning parameters. For
heating stability, it should have programmed with the tuning parameters for the cooker
currently being used.
You should always write down your old PID parameters, before auto-tuning the controller.
So if something goes wrong, you can always restore your previous PID parameters.
Basically, you must setup your cooking system close to your actual cooking environment.
E.g, the water you use for auto-tune should be the same as your normally use.
To activate auto-tuning, please set AT to 1; then exit the menu. The display will start to
flash alternately between AT and the current reading temperature, indicating the
auto-tuning is in progress. When the display stops flashing, the auto-tuning is finished.
The newly calculated PID parameters are set and ready to use. The new parameters will
store in the memory even when the controller is rebooted.
The duration of auto-tuning depends on how fast the system is responding to the heating
and cooling cycle. If the temperature of the cooker takes a long time to drop when the
heater is off, the auto-tuning could be a very long tuning process, such as a well-insulated
cooker. The auto-tuning should be able to tune most of your chosen
heaters/smokers/cookers with great results.

t, cycle rate. The unit is in seconds. This unit determines how long for the controller to
calculate each action. For example, if T is set to 10 seconds, when the controller decides
the output should be 10%, it will turn on the heater 1 second for every 10 seconds. This
parameter should set at 2 second for heating with an electric heater. When controlling a
solenoid valve or a compressor of refrigerator, the T should be set to 10-20 to reduce the
frequency of on/off.
This group of parameters can be accessed by input code 166. Figure 6 is the flow chart that
shows how they can be changed. Press and hold SET key for 3 seconds until LED displays
“LoCK.” Then release the SET key. The display will show “0”. To get into parameters setting
mode, you need to key in the pass code. Use “+” and “-“keys to adjust the display to 166 and
press SET. The LED will show “P” for a second and then its P setting value, Use “+” and “-” keys
to change the setting. When finished, press the SET again to confirm the change. The display
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will show the “I “ for a second and its I setting value next, use the same “P” setting procedure to
set the I value. When finished, press the SET again to confirm the change. The display will show
the “d” for a second and its value next. Use the same “P” setting procedure to set the d value.
When finished, press the SET again to confirm the change. The next setting is “AT”, the
auto-tune. Use “+” to set the value to 1 and press SET will activate the auto-tune. The next
setting is the “T” setting, use “-” and “+” to set the cycle time value. This value should be 2 for
most application. After change the PID parameter, the controller needs to be turned off and on
again for the best result.
30
SET
Lck
SET
166
P
7
3 sec
SET
SET
I
600
SET
SET
d
150
SET
SET
at
0
SET
SET
t
SET
2
SET
Figure 6. Parameter setup flow chart (Code 166).
5.2 The second group is about the system configuration and set up. Once they are set, they
normally do not need to be changed. This group of parameters can be accessed by access code
155. If you don’t want your system to be altered by others, do not let other people know this code.
Table 3 shows the list of the parameters, their range and initial set value.
Table 3. List of control parameters and the initial settings under code 155.
Symbol Display Description
Range
SC
SC
Offset (Degree)
-40~+40
OUT
OUT
Output Power Reduction (%)
0-100
11
Initial
0
100
C-F
Mod
Hy
AS
C-F
MND
Hy
AS
Temperature Unit
Mode Selection
Hysteresis Band
Anti-short Cycle
Delay (only for cooling mode)
°C or °F
PID, Cool, Heat
0-9999
0-200
°F
PID
3
6
Details about each parameter.
 SC: Calibration offset. The parameter is used to make the input offset to compensate for
the error produced by sensor. Each unit is 1 degree. e.g. if the temperature displays 2 °C
in ice water mixture, set SC=-2 will make the display to shown 0 degree.

OUT: Output power reduction. It is expressed as a percentage value. This function will
allow you to control the maximum output power delivered by the heater. For example, if
you set Out=50 and your heater is 1000 watts, the output will use 50% of the 1000 watts
as the full output. It treats the 1000W heater as a 500W heater. When the PID algorithm
determines 50% output value, the actual power output will be 250 watts. This function can
be used in two situations.
1) When you have a very powerful heater and are using a very small pot of water to cook
at very low temperature, for example, a 1400 watts heater with a one litter (1 qt) pot of
water at 130 F. The heater is too powerful for the small water volume. The moment it is on,
it releases too much energy and overshoots the temperature. Although it is still possible
to stabilize the temperature with proper PID parameters, it is much easier to control if you
limit the maximum output to 25%. Ideally, an optimized temperature control system
should consume about 25% of the heater power at set temperature (steady state), for
example, if you found out that only 50 watts of energy is needed to maintain the
temperature at 60 °C (141 °F), ideally you should use only a 200 watts heater for the job.
Too much power will make the system over react too quickly. Too little power will make
the system too slow in response. By using the OUT parameter, you can make a 1400
watts heater to act as a 200 watt heater for stable temperature control.
2) When the cooker consumes more power than controller can handle, for example, if you
have a 12A, 120V AC heater and your cooker contains more than 38 liter (10 gallon) of
water. It might take more than 90 minutes of full power heating for controller to heat up
the pot. Long time of full power operation might cause the controller overheating. You can
set the output to 80%. It will prevent overheating the controller from staying a full power
for a long time.

C-F: Temperature unit setting. You can set the display to either Celsius or Fahrenheit.

Mod: Mode selection setting. Three control modes are available: PID (PID mode for
heating); Cool (on/off mode for cooling), and Heat (on/off mode for heating).
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
Hy: Hysteresis band (or dead band). This parameter is valid only on/off control mode. In
the on/off heating mode, the controller will stop sending power to the heater when
temperature T is above the set value (SV), and start sending power again to the heater if
T drops below (SV-Hy). For example, if SV=100 °C. Hy=3 °C, the heater will be turned off
when the temperature rise above 100 °C; it will be turned on again as the temperature
drops below 97 °C. For the on/off cooling mode, the compressor will be turned off when
T<SV. It will be turned on again when T>SV+Hy.

AS: Anti-short cycle delay. The Anti-short is the delay time to turn on the cooler (E.g,
refrigerator). If the cooler is compressor based, compressor should not be turned on
immediately when it is at high pressure (just after turned off). Otherwise, it may shorten
the life of compressor. The anti-short cycle delay function can be used to prevent the
rapid cycling of the compressor. It establishes the minimum time that the compressor
remains off (after reaching cutout) before turns on again. The delay overrides any
controller demand and does not allow the compressor to turn on until the set delay-time
has elapsed. It gives time to release the refrigerant pressure through evaporator. It
typically set to 6 (minutes). The unit is in minutes. This setting is only valid for cooling
mode control.
30
SET
3 sec
Lock
155
SET
sc
0
SET
SET
out
100
SET
SET
O
C-F
SET
SET
MOD
F
P1D
SET
hy
SET
AS
SET
SET
3
SET
6
SET
Figure 7. Parameter setup flow chart (Code 155).
This group of parameters is accessed by input code 155. Figure 7 is the flow chart that shows
how they can be changed. Press and hold SET key for 3 seconds until the Parameter Window
13
displays “LoCK”. Release the SET. The display will show “0”. Use “+” and “-” keys to adjust the
display to 155 (another pass code) and press SET. The display will show the parameter for a
second and then its value, use “+” and “-” keys to change the setting. When finished, press the
SET again to confirm the change. The next parameter will be displayed then.
5.3 The third group of parameters is about the alarm setting with access code 188. Table 5
shows a list of the parameters, their range and initial set value when left the factory.
Table 5. List of control parameters and its initial settings under code 188.
Symbol
Display
Description
Range
AH
AH
Probe High Limit Alarm
-99-9999
AL
AL
Probe Low Limit Alarm
-99-9999
ASt
ASt
Step Finish Alarm
on, off
Initial
290
0
on
Details of each parameter.
 AH: High limit alarm for probe. User can set the temperature so that if the system is out of
control, the buzzer will be turned on. For example, if AH set to 290, the buzzer will be on
at 291 and off at 290. When the buzzer is on, the display window will flashing between
AH1 and the current temperature.

AL: Low limit alarm for probe. For example, if AL is set to 100. The buzzer will be on when
temperature drop to 100. It will be turned off when temperature rise to 101. This alarm is
suppressed when first powered up. It will only function after the temperature has reached
set point once. When the buzzer is on, the display window will flashing between AL1 and
the current temperature.
ASt: Step ending alarm. When ASt is turned on, the buzzer will beep 4 times when each
step is finished. It is useful to notify the user the cooking step is finished. User can turn it
off if no buzzer sound is wanted at the finish of each step.
Note: Temperature alarms can be muted by pressing the “-” key. The Step Finish
Alarm cannot be muted; it can only be turned off by the ASt setting.
The flow chart in Figure 10 shows how they can be changed. Press and hold SET key for 3
seconds until the Parameter Window displays “LoCK”. Release the SET. The display will show
“0”. Use “+” and “-” keys to adjust the display to 188 (another pass code) and press SET. The
display will show the parameter for a second and then its value, use “+” and “-” keys to change
the setting. When finished, press the SET again to confirm the change. The next parameter will
be displayed then.
14
30
SET
3 sec
Lock
188
SET
AH
290
SET
SET
AL
0
SET
SET
AST
ON
SET
SET
Figure 10. Parameter setup flow chart under (code 188).
6. Save and recall recipes
This controller can save up to 8 pieces of smoking recipe (programs). Each recipe file can have
up to 6 steps (C-1 to C-6). For convenience, we have pre-named these 8 pieces of recipe files as
B1 (beef), B2, C1 (chicken), C2, F1 (fish), F2, P1 (pork), and P2. These recipe files are all the
same except their names, so you can store your special recipe to any of them. These recipes
can be stored in the memory of the controller even when it is powered off. You can overwrite the
exist recipe with a new one.
6.1 Save a recipe.
After a program has been entered, the user can save this current program as a recipe for future
use. Under the normal operating mode, press and hold SET key for 3 seconds until the
Parameter Window displays “LoCK”. Release the SET. The display will show “0”. Use “+” and “-”
keys to adjust the display to 2 and press SET. The display will show “SAVE” for a second and
then the value “End”. If press SET key now, you will exit this mode without overwriting any
existing programs. Use “+” or “-” key to select the name of recipe to which you want to store the
program. If you press “+” (or “-” key) repeatedly, you will see “End”, “b1”, “b2”, “C1”, “C2”, “F1”,
“F2”, “P1”, “P2” one by one. Press the SET key again to store your current program under the
selected recipe name. This process will overwrite the current recipe data to the saved recipe
data. Figure 11 shows the flow chart of how to save a recipe.
15
SET
80
lock
SET
2
SET
SET
End
saue
-
+
SET
+
SET
+
SET
+
SET
+
SET
+
SET
+
SET
+
SET
b1
b2
C1
C2
F1
F2
P1
P2
-
+
End
SET
Figure 11. Flow chart of saving a recipe.
6.2 Recall a recipe.
WARNING: You current program will be overwritten by the selected recipe. Please write it down
somewhere if it is important to you.
To recall a recipe, press and hold SET key for 3 seconds until the Parameter Window displays
“LoCK”. Release the SET. The display will show “0”. Use “+” and “-” keys to adjust the display to
1 and press SET. The display will show “rC” for a second and then the value “End”. If press SET
key now, you will exit this mode without overwriting any existing programs. This can prevent your
current program been accidently overwritten by a recalled program. Use “+” or “-” key to locate
recipe you want to recall. If you press “+” key repeatedly, you will see
“End”, ”b1”, ”b2”, ”C1”, ”C2”, ”F1”, ”F2”, ”P1”, and ”P2” one by one. After you locate the recipe that
you want to recall, press the SET key to select. Current program will be overwritten by the
selected program. Figure 12 shows the flow chart of how to recall a recipe.
16
SET
80
SET
lock
SET
SET
1
End
rC
-
+
SET
+
SET
+
SET
+
SET
+
SET
+
SET
+
SET
+
SET
b1
b2
C1
C2
F1
F2
P1
P2
-
+
End
SET
Figure 12. Flow chart of recalling a recipe.
7. Single-step mode
In this mode, the controller will hold temperature at one set value (C-1) continuously as long as
the controller is powered on. Even if the controller is powered off and turned on again, it will
resume working in this mode. You do not need to enter any other program steps in this mode.
To enter the single-step mode, the user need to set the parameter “PrG” to “off”. Under the
normal operating mode, to recall a recipe, press and hold SET key for 3 seconds until the
Parameter Window displays “LOCK”. Release the SET. The display will show “0”. Use “+” and “-”
keys to adjust the display to 3 and press SET. The display will show “PrG” for a second and then
the value “on”. Use “+” or “-” key to toggle between “on” to “off”. Select “off” and press SET key if
you want to enter the single-step mode. Otherwise, select “on” and press SET key to enter the
program mode. The controller will go back to the normal operating mode. To set the temperature,
press SET key once, and the left window will show “C-1”. Use “+” or “-” key to adjust the
temperature in the right window, then press SET to save and exit. Figure 13 shows the flow chart
of how to switch to the single-step mode.
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SET
80
lock
3
SET
Prg
SET
SET
on
-
+
SET
off
Figure 13. Single-step mode flow chart.
In single-step mode, the save and recall function (Section 7) still work. But the change can only
be applied to C-1, i.e., you can only store your current set temperature to the C-1 in a selected
recipe, or recall the C-1 temperature from a selected recipe to the current set temperature. Other
data will remain in the memory of controller but is not accessible under the single-step mode. To
exit the single-step mode, you only need to change the “PrG” value to “on”.
Please note: In older versions, it may show PrG options as “y” or “n”, instead of “on”,
“off”. To enter single-step mode, please select “n”.
8. Examples
8.1 Store your program as a recipe (Program Mode)
Before you input your program, check the PrG = on (accessed by LoCK code “3”). Press SET
briefly, and enter the program below:
C-1=120, t-1=2.0;
C-2= 290, F-2=160;
C-3=130, F-3=30.0.
You can leave the rest of steps as their default values.
To store in program to recipe b1, long press SET key, set LoCK=2, choose b1, and press SET
again to confirm and exit. Now the controller is back to the normal operating mode. It will run on
this current program, which has just been saved as recipe b1.
8.2 Recall a recipe to the current program (Program Mode)
Before you input your program, check the PrG = on (accessed by LoCK code “3”). Long press
SET, set LoCK=2, choose b1, press set to exit.
Then recipe b1 is recalled back as the current program. The controller is back to the normal
operating mode and will start run the current program.
8.3 Store your program as recipe (Single-step Mode)
Before you input your set temperature, check the PrG = off (accessed by LoCK code “3”).
Press SET key once, and then set C-1=150, press set again to confirm and exit. The controller
will go back to the normal operating mode and start running on this single-step program.
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To store current program back to recipe b2, long press SET, set LoCK=2, choose b2, press set to
confirm and exit. Now your current program is stored as recipe b2.
8.4 Recall your recipe to current program (Single-step Mode)
Before you input your set temperature, check the PrG = off (accessed by LoCK code “3”).
Long press SET, set LoCK=1, choose b2, press set to confirm and exit.
Now the C-1 from the recipe b2 is recalled back to your current program. The controller will start
run at this temperature setting.
8.5 Advanced examples
This example will show you how the PrG mode can affect the saved and current recipe/program.
1) Set PrG = on, select “b1” recipe:
C-1=120, t-1=2.0;
C-2= 290, F-2=160;
C-3=130, F-3=30.0;
2) Change PrG = off, now the current single-step program is:
C-1: 120.
3) Set current C-1 to 200, then store current program back to recipe b1. Now the b1 recipe is:
C-1: 200.
4) Change PrG = on, current b1 recipe is:
C-1=200, F-1=2.0;
C-2=190, F-2=160;
C-3= 130, F-3=30.0.
9. Factory reset function
WARNING! This function will restore all the parameters (including receipts in the memory) back
to factory default. Please write all the necessary settings down.
To reset, under the normal operating mode, press and hold SET key for 2 seconds until LED
display “LoCK”, and then release the SET key. The display will show “0” then. Use “+” key to
adjust the number to 666 and press SET key again to confirm. The display will show as “lnlE”,
then it will show as “off”. Press “+” key once to change “off” to “on”. Press SET key to confirm
factory reset. The display will show “----” then “8.8.8.8.” When you see this display back to normal
operating mode, factory reset completed. Please check Figure 14 for reset flow chart.
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SET
80
lock
666
SET
inie
SET
SET
off
-
+
SET
on
Figure 14. Factory reset flow chart. “on” is to confirm reset, “off” is to cancel reset.
Please note: In older versions, it may show InIE options as “y” or “n”, instead of “on”,
“off”. To reset, please select “y”.
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Appendix 1
Managing the heat generated by the controller
The heat dissipation of the controller is directly related to the electric current drawing power of
the heater. If your cooker consumes less than 10 ampere of current or your pot is less than 5 gal
(19 liters), you do not need to worry about the heat generated by the controller.
Sometimes, the AC current requirement might not be marked on the cooking appliance. To find
out how much current it will draw, divide the power (in wattage) by the line voltage, for example,
an 1800 watts 120V heater will draw 15A. A 2000 watts 240V heater will draw 8.3 Ampere.
Why the heat becomes an issue?
The solid state relay (SSR) used in the controller is a critical component for the precision
temperature control. With the SSR, the power can be switched at high speed with no noise and
no life time limitation. However, compared to electromechanical relays, the SSR has one
drawback. It generates heat when passing the current. SSRs are made of semiconductors that
have a limited conductance. When passing current, the heat will be produced from the resistance.
Each ampere of current will produce about 1.3 watts of heat. When 12 Amp is passing through
the controller, 16 watt of heat is produced in the controller. As more heat is produced, the
temperature inside the controller will rise. If it reaches to higher than 70 °C, it can shorten the life
or even damage some other components in the controller. The temperature inside of the
controller depends on the amplitude of the current, how long the controller needs to run at full
power and the ambient temperature.
The heat is only an issue during the start of the heating when the heater is running at full power.
Once the temperature is close to the set point, the controller will probably need less than 50% of
the power to maintain the temperature. Since the heat is directly related to the current passing
the controller, the heat produced at steady state will be insignificant and can be ignored.
When the heat becomes an issue?
This controller can run at 10A continuously without worry of the temperature of the controller. At
12A, the temperature of the controller will increase with time. The bottom of the controller where
the heat sink is located can rise by 63 °F (35 °C) from ambient if running at full power
continuously for 90 minutes. For this reason we don’t recommend running the controller at full
power for more than 90 minutes. For 120 VAC, 15 A for 90 minutes will provide enough energy to
heat 10 gallons (38 liters) of water up by 108°F (60 °C). If your have a pot that is bigger than 10
gallons and the heater is drawing 15 A, and you need to raise the temperature by 108 °F, you
better use one of the methods mentioned below to reduce the heat in the controller. Otherwise,
you might damage the controller.
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Please note that when the ambient temperature is hot, as it often is the case in some commercial
kitchens, the temperature of the controller will get hotter. This is because the heat dissipation is
mostly determined by the temperature gradient (the temperature difference between the ambient
and the controller) instead of absolute temperature of the controller itself. If the controller reaches
50 °C when the ambient is at 20 °C, it will reach 70 °C when the ambient is at 40 °C.
Solutions to reduce the heat stress on the controller.
1) Use hot water. If you fill the pot with hot water that has a temperature close to the set
temperature, the heat dissipation of the controller is not an issue. As we have mentioned, once
the temperature is close to the set point temperature, the controller starts to pulse (PWM) the
power. The effective current is much lower, making heat not an issue.
2) Limit maximum output power. If you set output reduction parameter to 80%, then, a 15A heater
will become a 12A heater. It will take 25% longer time to heat up the pot, but the controller will not
over heat.
In addition to these solutions, following information will also help you to manage the heat.
Place the controller in the right place. The SSR of Auber WS series controller is mounted in the
bottom of chassis. The chassis is made of 3 mm thick aluminum for good heat dissipation. Do not
cover the controller with any insulation. If you are running at 15 A with a large pot, placing the
controller in a well ventilated area and tilting the instrument up with its front legs will help it to
remove heat more efficiently. However, the tilted position may result in water collected at the
back frame. Although the controller is splash proof, you should avoid water to be dripped on the
controller when you open the lid of the cooker.
Increase the P value. This can only provide limited help for reducing the heat. P is the
proportional band. P=200 means the proportional band is 20.0 degrees. When the temperature is
raised to less than 20 degree from the set point temperature, the controller will start to reduce the
power sooner. But if the integration time is set to very short, the controller might start to run at full
power again soon.
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