eutech-instruments alpha ph 190 18 din phorp controllertransmitter User Manual

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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