User Guide

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1 INTRODUCTION
Thank you for purchasing the αlpha pH 190 ⅛ DIN pH/ORP Controller. This
controller is part of a series of quality process controllers available from Eutech
Instruments. These sturdy, economical pH/ORP controllers are designed with the
features and reliability of a much more expensive instrument.
Your controller includes:
• Removable terminal blocks for easy connections;
• Two mounting brackets for easy panel mounting;
When shipped, the controller is set to the pH mode. See Setup program P3.1 for
directions on selecting ORP mode.
Some features of this controller are:
• Two set points, two SPDT relay operation
• Scrolling, 14-segment LED guides user easily through setup functions
• Reliable power supply from 85 to 260 V AC, 50/60 Hz or DC withstands
voltage fluctuations
• Push-button operation from the front panel
• Two-point pH calibration, offset temperature and ORP calibration
• Adjustable hysteresis band prevents rapid contact switching near set-point
• Selectable automatic or manual temperature compensation
• Two-level password protection
• Removable terminal strips for quick and easy connections
• Built-in non volatile memory retains setup even if power fails, and lets you
configure unit before installation
• Isolated 4-20 mA output for remote monitoring or hard copy recording