EUTECH INSTRUMENTS ALPHA CON 500 2-WIRE TRANSMITTER Instructions d'exploitation télécharger pdf (Page 5)

1 INTRODUCTION

1.1 Description of Unit

Thank you for purchasing Eutech’s ¼ DIN alpha-800 series pH/ORP

process controllers. This unit is used for measuring either pH or ORP

parameter one at a time, and the operational mode is switchable from the

menu. You can use this unit to measure pH or ORP with limit control.

This controller has many user-friendly and safety features which include:

• Menu-driven program that simplifies set-up

• Built-in non-volatile memory backup to ensure that calibration and

other information are not erased if power supply fails

• Push-button two-point calibration and electrode offset

adjustment from the keypad

• Automatic temperature compensation (ATC)

• Manual temperature compensation setting without the ATC probe,

with independent setting for calibration and process temperature

• 0 to 2000 second time delay adjustment on all relays – minimise

false alarms

• Separately adjustable high and low set point hysteresis (dead

bands) prevent chattering of relays around the set points

• Asymmetrical/symmetrical input for pH/ORP operation

• Large dual display LCD for easy reading with clear multiple

annunciators, alarm status, operational and error messages

• Two switching contacts as set-point triggering relays

• Hold function freezes output current (4/20mA) and control relays

• LED indicators signal control activities to monitor controller status

from a distance

• Protection against electromagnetic interference – Input and

output are free from external inference

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EUTECH INSTRUMENTS ALPHA CON 500 2-WIRE TRANSMITTER Instructions d'exploitation Page 5