BREWHA Equipment Co Ltd.
www.brewhaequipment.com
2017.01
P2/3
5. Parameter Settings
To change the temperature set point, press the SET key
momentarily. The controller will show CSP (Cooling set point),
pressing SET again will show HSP (heating set point). When the
controller shows CSP or HSP, use the Up or Down keys to change
the value. Then press the SET key again to confirm the change.
To change the system parameters, hold the SET key down for 5
seconds and the controller will enter the parameter set up mode.
The first parameter, AH (Alarm High Limit), will show on the display.
Use the Up or Down keys to modify the parameter value, then press
the SET key to confirm the change. The display will show the
parameter again. Press the SET key again to show the next
parameter. The instrument will automatically exit if no key is
pressed for 10 seconds. Please see Table 1 for the default
parameters.
Table 1. Parameter Description
Note 1.
For cooling (or heating), the receptacle will be off when the
temperature is below (or over) the set point and will be on again
when the temperature rises up (or drops down) to CSP+CdF (or HSP-
HdF). This ensures that the ETC does not try to cool and heat at the
same time.
The maximum value of the HSP can be set is the current value of
CSP. But CSP can be set to the value between 28~221 ºF or
-2~105 ºC. When the CSP is set to a value lower than current HSP,
the HSP will be adjusted to the CSP value automatically. This means
that during mashing and boiling, it is convenient to set the cooling
set point above 212F so that the heating set point can be set
anywhere below 212F.
For example, when CSP=67.0 ºF, HSP=62 ºF, HSP can be set to any
value between 28 and 67.0. For CSP, it can be set to any value
between 28 and 221. If you set it to 55.0, the HSP will be set to 55.0
automatically.
Code
Description
Setting Range
Initial
Note
CSP
Cooling Set Point (temp at
which cooling receptacle is
powered)
-2 to 105ºC
28 to 221ºF
19.4ºC
67ºF
1
HSP
Heating Set Point (temp at
which heating receptacle is
powered)
-2 to CSP ºC
28 to CSP ºF
16.6ºC
62ºF
AH
Alarm High Limit (high temp
at which alarm sounds)
-2 to 105ºC
28 to 221ºF
35ºC
95ºF
2
AL
Alarm Low Limit (low temp at
which alarm sounds)
-2 to AH ºC
28 to AH ºF
0ºC
32ºF
CdF
Cooling Differential (from set
temp to turn cooling on)
0 to 27 ºC
0 to 50 ºF
3
1
HdF
Heating Differential (from set
temp to turn heating on)
0 to 27 ºC
0 to 50 ºF
1
AS
Cooling Antishort (time delay
between turning power
on/off)
0-12 min
0
3
SFA
Sensor Failure Operation (if
sensor fails, which
receptacles are powered)
0-0, 0-1, 1-0
0-0
4
oFS
Temperature Offset
(permanently adjust display
temp)
0-10
0
5
C-F
Temperature Units
C is Celsius
F is Fahrenheit
F
A small differential between heating (HdF) and cooling (CdF) set
points gives tighter control but a larger differential reduces the
frequency of cycling on and off and therefore extends the life of the
relay and compressor.
Note 2.
When the measured temperature is higher than the AL set
point, the high limit alarm will be on; when the measured
temperature is lower than AL, the low limit alarm will be on.
When the alarm is on, the display will be flashing between the
measured value and the alarm type. To mute the alarm when it is
on, press the Down key momentarily. (If the measured value moves
out of the alarm zone and then returns into the alarm zone again,
the alarm will sound again. To disable the alarm, set AH=AL.)
The maximum upper value that AL can be set to is the current
value of AH. But AH can be set to any value between 28~221 ºF or
-2~105 ºC. When AH is set to a value lower than the current AL, the
AL will be adjusted to the AH value automatically. For example,
when AH=95.0 ºF, AL can be set to any value between 28 and 95.0.
For AH, it can be set to any value between 28 and 221. If you set it
to 55.0, the AL will be lowered to 55.0 automatically as AL cannot
be above AH.
No
te 3.
The
Cooling Antishort is the minimum delay time in
minutes for turning the cooling load back on. When the controller
is used for cooling and the load is a compressor (such as glycol
chiller), it should not turn on the compressor when it is at highest
pressure (e.g. just after it turned off) otherwise, it may shorten the
life of the compressor. The Anti-Short cycle delay function,
therefore, can be used to prevent the rapid cycling of the
compressor. (Technical note: it does this by establishing the
minimum time that the NO contacts remain open—after reaching
cutout—before closing again. The delay overrides any Load
Demand and does not allow the NO contacts to close until the set
time-delay value has elapsed. This allows time for the refrigerant to
be released through the evaporator, lowering pressure. It is
typically set to 4-6 minutes).
Note 4. The Sensor Failure defines how the output would be if the
sensor fails. It is a safety feature. It can be set to 0-0, 0-1 or 1-0. For
brewing, the best option is generally 0-0 as this will shut off any
heater that is connected. Please refer to table 2 for details.
Table 2. Output of the controller when the sensor fails:
Note 5
.
The Temperature Offset is used to set an input offset to
compensate for any error produced by the sensor or input signal
itself. This is useful for calibrating your ETC for precise readings.
For example, for temperature, if the unit displays 37 ºF when the
actual temperature is 32 ºF, setting parameter to F= -5 will make
the controller display 32 ºF.
6. How to attach the sensor to the unit.
The sensor connector contains a slot for correct pin connection. It
also has a spring lock to prevent disconnections from accidental
pulling on the cable. To attach it to the unit, align the slot of the
SFA
Controller output when sensor fails
0-0
Cooler and heater off
1-0
Cooler on and heater off
0-1
Cooler off and heater on
