AUBER INSTRUMENTS
WWW.AUBERINS.COM
2019.01
P6/6
(or higher than
SV in cooling mode), timer won’
t restart until temperature
reaches SV again.
5. Application Examples
A. Powder Coating Oven (Contactor)
Contactor
240VAC
L2
TC
+
-
1
13 14
6
2
3
4
5
7
8
9
10
Fuse
SWA-
2441A
Buzzer
11 12
Heater
L1
Figure 6. Typical wiring set up for powder coating oven.
A powder coating oven needs to heat up to 375 ° F. Hold the temperature for 20
minutes. Then, turn off the heater and turn on the buzzer. The application
needs a controller SWA-2441A, a 40A/240V contactor, a thermocouple and a
buzzer with a 220VAC power source. Using alarm 1 as timer alarm, alarm 2 as
high temperature alarm.
Example settings: SV = 375° F, ALP1 = 0, ALP2 = 1, AL2 = 400° F, UPT = 1,
TE1 = 20, INT = 1.
B. Heat press for heat transfer printing
L
1
13 14
6
2
3
7
8
9
10
N
120V AC
SWA-
2441A
11 12
Reset Switch, NO
Heater
Fuse
TC
-
+
Indicator
4
5
Figure 7. Typical wiring for a heat press.
When the press is down, it closes the micro switch. The heater will heat to
300° F for 2 minutes and then stop. Alarm light turns on. When reading
temperature is over 320° F, alarm light turns on as well.
Example settings: SV = 300° F, ALP1 = 0, ALP2 = 1, AL2 = 320° F, UPT = 1,
TE1 = 2, INT = 1. This example assumes the heater is less than 1000 W. For
larger heater, an external relay is needed.
6. Trouble Shooting
6.1 Timer
won’t start
Check the connection between terminal 11 and 12. These two terminals must
be jumped together to enable the timer. A momentary NC switch on pin 11 and
12 can serve as a timer-reset switch.
6.2 No heating
The OUT LED is synchronized with output relay. If there is no heat when it is
supposed to, check the OUT first. If it is not lit, the controller parameter setting
is wrong. If it is on, check external switching device (if the relay is pulled-in, or
the SSR s red LED is on). If the external switching device is on, then the
problem is either the external switching device output, its wiring, or the heater. If
the external switching device is not on, then the problem is either the controller
output, or the external switch device.
6.3 Poor accuracy
Please make sure calibration is done by immersing the probe in liquid.
Comparing with reference in air is not recommended because response time of
sensor depends on its mass. Some of our sensor has response time >10
minutes in the air. When the error is larger than 5 ° F, the most common
problem is improper connection between the thermocouple and the controller.
The thermocouple needs to be connected directly to the controller unless
thermocouple connector and extension wire is used. Copper wire or
thermocouple extension wire with wrong polarity connected on the
thermocouple will cause the reading drift more than 5 ° F.
6.4 Under on/off control mode, although hysteresis is set to 0.3, unit is
running 5 degrees above and below.
If the Hy is very small and temperature change very fast, user needs to
consider the delay of the cycle time (the parameter t). For example, if cycle time
is 20 seconds, when the temperature passes the SV + Hy after the very
beginning of 20 seconds, relay will not act until it starts the next cycle 20
seconds later. The temperature could be much higher than the set point. User
may change the cycle time to a smaller value, such as 2 seconds, to get a
precise control.
6.5
Display “
HH
”
This is an input error message. The possible reasons are: the sensor is not
connected or not connected correctly; the sensor input setting is wrong; or the
sensor is defective. In this case, the instrument terminates its control function
automatically. If this happens when using thermocouple sensor, you can short
terminal 4 and 5 with a copper wire or paper clip. If the display shows ambient
temperature, the thermocouple is defective. If it still displays “
HH
”, check the
input setting, Sn, to make sure it is set to the right thermocouple type. If the Sn
setting is correct, the controller is defective. For RTD sensors, check the input
setting first because most controllers are shipped with the input set for
thermocouples. Then check the wiring. The two red wires should be connected
to terminals 4 and 5. The white wire should be connected to terminal 3.
6.6 Cannot change set temperature
Please check parameter dIH and dIL. These two parameters limit the set
temperature range. If you set dIH and dIL at the same value (like 100), the set
temperature (SP) can only be set as 100, and user cannot adjust it.
Auber Instruments
5755 North Point Parkway, Suite 99
Alpharetta, GA 30022, USA
E-mail:
Tel: 770-569-8420
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