EUTECH INSTRUMENTS ALPHA PH 800 PHORP CONTROLLERTRANSMITTER, Руководство по эксплуатации, Страница: 5 / 34

1
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:
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Menu-driven program that simplifies set-up
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Built-in non-volatile memory backup to ensure that calibration and
other information are not erased if power supply fails
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Push-button two-point calibration and electrode offset
adjustment from the keypad
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Automatic temperature compensation (ATC)
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Manual temperature compensation setting without the ATC probe,
with independent setting for calibration and process temperature
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0 to 2000 second time delay adjustment on all relays – minimise
false alarms
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Separately adjustable high and low set point hysteresis (dead
bands) prevent chattering of relays around the set points
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Asymmetrical/symmetrical input for pH/ORP operation
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Large dual display LCD for easy reading with clear multiple
annunciators, alarm status, operational and error messages
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Two switching contacts as set-point triggering relays
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Hold function freezes output current (4/20mA) and control relays
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LED indicators signal control activities to monitor controller status
from a distance
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Protection against electromagnetic interference – Input and
output are free from external inference