MRC DFO Series Manuale utente

Operation manual for

DFO –DFI

Series

General Overview

Main Temperature Controller

Number

Key

Description / Function

③

For setting and calling up parameters.

④

To increase the value of digits.

⑤

To decrease the value of digits.

⑥

R

Revert /STOP/Restart Timer (For machine with timer use

only)

⑦

PV

To display process value, menu symbol and error code.

⑧

SV

To display set point value, parameter value or control output

value.

⑨

C

Process Unit Indicator- Celsius

⑩

ALM 123

Indicator

Over-Heat Temperature.

Lights on when actual temperature over the set temperature

5℃, and turns off the heater.

⑪

OUT 1 2

Control output lamp 1.

Light on when heater is activated

⑫

MANU

Lamp flashes during Manual Mode operates

⑬

COMM

Communication indicator

⑭

TUNE

Lamp flashes during auto-tuning operates

⑮

Lock indicator

Setting parameter

The PV display indicates the parameter symbol, and the SV display indicates the

selected value of the selected parameter.

Setting the Temperature (Continuous mode)

Put the front switch on CONTINUES

Turn on the temperature controller/power switch. The temperature displays light up

and after a few seconds, the upper display shows the present value (PV) temperature.

The lower display shows the set value (SV) or set temperature.

Press to increase temperature gradually.

Press to decrease temperature gradually.

Setting the Temperature (timer mode)

Put the front switch on TIMER

Turn on the temperature controller/power switch. The temperature displays light up

and after a few seconds, the upper display shows the present value (PV) temperature.

The lower display shows the set value (SV) or set temperature.

Press to increase temperature gradually.

Press to decrease temperature gradually.

Press number ③twice. PV display , SV display 1.0

Press to increase or decrease time gradually. Setting time upon what you

need.

The timer will start from the temperature reach setting.

For example:

1.5 = 90 seconds (1.5 minutes), 1.0 = 60 seconds (1.0 minutes) 0.5 = 30 seconds.

Press number ③once. PV display , and SV display 1.0 →It mean the time

will counting down 1 min after temperature reach to the setpoint.

User Calibration (only if needed)

Each unit is calibrated in the factory before shipment. The user can still modify the

calibration in the field.

There are two parameters: Offset Low (OFTL) and Offset High (OFTH) for

adjustment to correct an error in the process value.

Press and hold the key until the setup Menu page is obtained.

Then, press key to scroll to the parameter .

Press key several times to scroll to the parameter OFTL to calibration low

value. Send your low signal to the sensor input of the controller, then press and

release the key. If the process value (the upper display) is different from the input

signal, the user can use and to change the OFTL value (the lower display)

until the process value is equal to the value the user needs. Press and hold the key

for 5 seconds to complete the low point calibration. A similar procedure is applied for

high scale calibration.

The two points OFTL and OFTH construct a straight line. For the

purpose of accuracy, it is best to change the value same on the two points as possible.

Auto-Tuning (only if needed)

Instrument has been set the best PID value; we suggest executing auto-calculating

when temperature is unstable. Enter auto-calculating:

Press and hold until appears on the display then release.

Press and hold at least 5 seconds. The TUNE indicator will begin to flash

and the auto-tuning procedure is beginning.

After the Auto-Tuning process is completed, the TUNE indicator will stop

flashing and the unit will revert to PID control by using its new PID values. The

PID values obtained are stored in nonvolatile memory.

Note: To enable auto-tuning the lock parameter should be set to 1000.

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