User manual EUTECH INSTRUMENTS ALPHA CON 100 REV 1.1

[. . . ] Alpha CON 100 C/CX Conductivity Controller / Transmitter INSTRUCTION MANUAL Technology Made Easy . . . 68X103704 rev 1. 1 Jan 2001 Preface This manual serves to explain the use of the Alpha CON 100 Conductivity Controller/Transmitter. The units covered are Alpha C and CX Conductivity Controller/ Transmitter. The instruction manual functions in two ways: first, as a step by step guide to help you operate and understand the operation of the unit and second, as a handy reference guide. The information presented in this manual is subject to change as improvements are made, and does not represent a commitment of Eutech Instruments Pte Ltd. [. . . ] Press ENTER key to enter the Conductivity calibration mode. Dip both the Conductivity electrode and temperature probe in the standard solution NOTE: The Conductivity standard solution should have a conductivity value between 40% to 100% of its full scale range selected 3. 4. 10 5. When "CAL COn" displays, press ENTER key to view the default cell constant at 100%. Press ENTER key again to show MOD the measured conductivity value. ENTE Use and keys to scroll to SETUP the standard's Conductivity value o at 25 C. Press ENTER key to calibrate MOD the Conductivity value shown. Display will show the new cell ENTE constant being displayed. This SETUP value will be between 70% to 130%. Otherwise an error message "CAL" and "Err" MOD alternatively blinks to indicate ENT out of calibration range. Press ENTER key to complete the calibration, and you will return to "CAL" and "COn" menu. Press MODE key and it brings EN you to the Measure mode. CAL COn CEL 100 SETUP NOTE : Gently stir the electrode in a container filled with calibrating standard, and ENSURE that no bubble is trapped during the calibration process to avoid erroneous reading. IMPORTANT : The correct Temperature Coefficient should be selected prior to Conductivity calibration. (Refer to Section 5. 5 for Setting Temperature Coefficient). CEL SETUP MO EN 99 SETUP MO EN 11 5. 3 Calibrating the Controller for Temperature Measurement 5. 3. 1 The CAL °C menu 1. MODE Enter this menu by pressing MODE key twice to the "SEt" ENTER display if you are in SETUP measurement mode. If the password has been set earlier, MODE key in the password using the ENTER method described in section SETUP 4. 1. After you set the correct password, you see the "CAL" MODE and "COn" display blinks ENTER alternately. Press key twice, SETUP the display shows "Hi" "SEt" blinking alternately. Press ENTER key to access the Hi SET menu and the display shows the last Hi SET value or default (90% of Full Scale). Use and keys to change the value of the Hi SET point. Press ENTER to confirm the value of the Hi SET point. Press MODE key to exit to the measurement mode. You can press MODE key (as an ESCAPE key) to revert to the measurement value if ENTER is not pressed; the set value is not stored into memory. ENTER SEt MODE 1. Hi 900 14 5. 4. 2 The Hi HYS Menu 1. Enter this menu by pressing the MODE key to the "SEt" display if you are in the measurement mode. [. . . ] It is not possible to set the high set point lower than the low set point and vice versa (taking the hysteresis band into consideration). For example, when the high set point is 8. 50 mS and the high hysteresis band is set at 0. 40 mS, then the low setpoint cannot be set at higher than 8. 50 - ½ Hi HYS. NOTE : The shaded area indicates the hysteresis band. Hi B A C D E Hysteresis Band Hy s Cond. Lo Hys Hi Set Actual F G H Lo Set Hysteresis Band 21 Explanation of the diagram in the previous page A - Reading reaches (Hi SET - ½ HI HYS), the Hi-Set relay remains inactivated. [. . . ]