1
1 INTRODUCTION
1.1 Description
of
Unit
Thank you for purchasing ¼ DIN 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
Summary of Contents for Alpha pH 800
Page 1: ...Alpha pH 800 Controller Transmitter pH ORP...
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Page 15: ...8 0V Pt100 RELAY A L N PE 100mA F FUSE 250VAC HOLD RELAY B Pt1000 PAL S NC NC NC NC...
Page 41: ...CALIBRATION RECORD Calibration Date Electrode Slope Electrode Offset...
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