User manual EUTECH INSTRUMENTS ALPHA CON 100 CONDUCTIVITY CONTROLLERTRANSMITTER

[. . . ] Alpha CON 100 C/CX Conductivity Controller / Transmitter INSTRUCTION MANUAL 888 uS/mS o MODE ENTER RELAY C SETU READY Technology Made Easy . . . 68X103704 6/98 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. [. . . ] 2. Calibrating for Conductivity Measurement The CAL COn menu Enter this menu by pressing the MODE key twice to the "SEt" display from the measurement mode. If the password has been set earlier, key in the password using the method described in section 4. 1. After you set the correct password, you can see the "CAL" and "COn" display blink alternately. 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%. ENTER Use v and w keys to scroll to SETUP the standard's Conductivity value at 25 oC. Otherwise an error message "CAL" and "Err" MODE alternatively blinks to indicate ENTER 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 ENTER 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. Enter this menu by pressing MODE key twice to the "SEt" display if you are in measurement mode. If the password has been set earlier, key MODE in the password using the method ENTER described in section 4. 1. After you set the correct password, you see the "CAL" and "COn" display blinks alternately. MODE Press w key twice, the display ENTER shows "Hi" "SEt" blinking SETUP 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). 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 SETUP SEt MODE 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. If the password has been set earlier, key in the password using the method described in section 4. 1. After you set the correct password, you see the "CAL" and "COn" display blinks alternatively. Press w key thrice, the display shows "Hi" "HYS" blinking. Press ENTER key to access the Hi HYS menu and the display shows the last Hi HYS value or default (2% of Full Scale). 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. HYS SETUP MODE ENTER Hi SETUP MODE ENTER 02 SETUP MODE ENTER NOTE : The maximum value of Hysteresis is 4% of its Full Scale (FS) selected. The HI HYS hysteresis is spread equally on either side of the Hi SET point. 15 5. 4. 3 The Lo SEt Menu 1. [. . . ] Additional Information The controller allows you to set High and Low alarms that switch on or off relays, and activating or deactivating devices linked to the controller. In cases where the Conductivity values fluctuate close to the high or low setpoints, the relays will continuously switch on/off very quickly and may cause problems to the linked devices. The hysteresis band allows you to set an allowable range of fluctuations to prevent the relays from activating and deactivating too quickly. 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). [. . . ]