Auber Instruments SYL-2362B Manuale di istruzioni - Pagina 4

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AUBER INSTRUMENTS

Instruction Manual

system, the built-in artificial intelligence program will calculate and set the PID

parameters for the controller. If your system has a very slow response, the

auto-tuning could take a long time.

AT start

ON OFF

Figure 7. Auto-tuning

6.1 To activate Auto-tuning, press and hold

starts to blink, which indicates auto-tuning is in progress. When "AT" stops

blinking, the auto-tuning is finished. Now, newly calculated PID parameters

are set to be used for the system. Please note that Auto-tuning is only for PID

control mode (when "outy" is set at 1 or 2).

6.2 To stop the Auto-tuning, press and hold

stops blinking. Then, the previous PID parameters value are resumed.

7. On/off control mode

On/off control mode is not as precise as PID control mode, however it is

necessary for inductive load such as motors, compressors, or solenoid valves

that do not like to take pulsed power. It works like a mechanical thermostat.

When the temperature passes the set point, the heater (or cooler) will be

turned off. When the temperature drops back to below the hysteresis band

(dead band) the heater will turn on again.

To use the On/off mode, set outy to 3 or 4 depending on the output device to

be used. Then, set the Hy to the desired range based on control precision

requirements. Smaller Hy values result in tighter temperature control, but also

cause the on/off action to occur more frequently. In the PID parameters menu

(code 0036), only ot and FILt are used. P, I, D and SouF are not meaningful.

100

SV-Hy

Relay On

Figure 8. On/off control mode

8. Manual mode

Manual mode allows the user to control the output as a percentage of the total

heater power. It is like a stove dial. The output is independent of the

temperature sensor reading. One application example is controlling the

strength of boiling during beer brewing. You can use the manual mode to

control the boiling so that it will not boil over to make a mess. The manual

mode can be switched from PID mode but not from On/off mode. To switch

from the PID to the manual mode, press and hold the

"AT/M" indicator turned on (about 5 seconds). In the manual mode, the top

display is for the process temperature. The bottom right is the percentage of

power output. The bottom left display show an "M" for user to easily identify

the controller is in manual mode. To switch from manual to PID mode,

press and hold

key until the "AT/M" indicator turned off. This controller

SET

offers "bumpless" switch from the PID to manual mode. If the controller

outputs 75% of power at PID mode, the controller will stay at 75% when it is

switched to the manual mode, until it is adjusted manually.

2018.07

AT end

AT calculation

ON OFF

ON/OFF

PID

key until the "AT" indicator

key until "AT" indicator

When heating, and outy=3 or 4,

If PV≤(SV-Hy), relay on

If PV≥SV, relay off

(SV=100, Hy=3)

key until the

SET

9. Limit control mode.

The Limit control mode will shut the heater off when SV is reached. The

heater will not be turned on again until the controller is reset manually (press

the

key for 5 seconds). When powered on, it will not start the heating

SET

until reset button is pressed. The controller can't be reset when the

temperature is within Hysteresis Band (Hy).

To use the Limit control mode, set outy to 5 or 6. Then, set the Hy to the

range that you want reset to be blocked. To start the heating or cooling,

press

key for 5 second or until the out indicator is on.

SET

100

Start

Relay on

Figure 9. Limit control mode

10. Application Example

10.1 A thermoelectric cooler (TEC) needs to be controlled at 45 °F. If

temperature is over 46 °F, the alarm1 will turn on to warn the operator and

turn off when dropped to below 45.5 °F. If temperature is below 44 °F, the

alarm2 will turn on to warn the operator and turn off when dropped to below

44.5 °F. The system consists of a 90W 24V DC TEC, a Pt100 RTD sensor, a

10A DC SSR, and two 5V DC buzzers.

a. Wiring diagram

Fuse

24V DC

Figure 10. Typical wiring set up for TEC cooler. For incubator control, the

TEC cooler should be change to heater. Rd=0 for heating.

b. Parameter setting. These are the parameters that need to be changed from

the initial value: Rd=1 for cooling mode. Inty=P10.0 for Pt100 RTD sensor

with 0.1° resolution input, SV=45 °F, AH1=46 °F, AL1=45.5 °F, AH2=44 °F,

AL2=44.5 °F.

Auto-tune is used to set the PID parameters. Power up the controller. Press

and hold the

key until "AT" starts to blink. The controller starts the Auto-

tuning. When the "AT" stops blinking, the new PID parameters are generated

for the system. The controller is in normal operation mode. The TEC will be

maintained at 45 °F.

Please note that you don't not have to wire or set the alarm to control

the temperature.

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outy=5, SV=100, Hy=3. The

SV-Hy

heating stops after it reached 100

degree.

TEC

+ -

RTD

SSR

+ -

5V DC

Alarm2

Alarm1

P4/5