EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Instrukcja Obsługi Pobierz pdf (Strona 6)

1 INTRODUCTION

1.1 Description of Unit

Thank you for purchasing the ¼ DIN Alpha pH1000 pH/ORP process controller/transmitter.

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

• Press-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

• Three control modes: limit, proportional pulse length or proportional pulse frequency

• 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

• A third relay that can be be set up to perform either Alarm or Wash function

• When set to work as Alarm relay, alerts you when readings exceed set-point limits after

a set time buffer, and if the Pt100/Pt1000 wires are broken or disconnected during the

ATC function

• Programmable duration and frequency in the Wash mode

• Hold function freezes output current (0/4…20mA) and releases control relays

• LED indicators signal control activities to monitor controller status from a distance

• Protection against electromagnetic interference – galvanically isolated 0/4…20mA

output provides safety for datalo

gging and control purposes

• Choice of 7 buffers from USA or NIST standards

1.2 Applications

Use this controller in panel mounted enclosures for applications such as water treatment and

monitoring, galvanic-decontamination, chemical processing food processing, clean or waste

water control and neutralisation process.

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EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Instrukcja Obsługi Strona 6