product image) Manual

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1 INTRODUCTION
Thank you for purchasing the Alpha pH 190 ⅛ DIN pH/ORP
Controller. This controller is part of a series of quality process
controllers available from Thermo Scientific. 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