Auber Instruments SWA-2441A Manuel d'instruction - Page 6

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(or higher than SV in cooling mode), timer won't restart until temperature

reaches SV again.

5. Application Examples

A. Powder Coating Oven (Contactor)

Buzzer

SWA-

2441A

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

Indicator

SWA-

2441A

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

2019.01

Fuse

Contactor

Heater

Fuse

Heater

Reset Switch, NO

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.

240VAC

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

120V AC

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.

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No part of this manual shall be copied, reproduced, or transmitted in any way

without the prior, written consent of Auber Instruments. Auber Instruments

retains the exclusive rights to all information included in this document.

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Auber Instruments

5755 North Point Parkway, Suite 99

Alpharetta, GA 30022, USA

www.auberins.com

[email protected]

Tel: 770-569-8420

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