User manual EUTECH INSTRUMENTS ALPHA CON 500 2-WIRE TRANSMITTER

[. . . ] Instruction Manual CON 500 LCD Transmitter Conductivity Transmitter with Display lpha CON500 MEAS READY 1413 . µS °C ATC 2-wire Conductivity Transmitter 68X216867 Technology Made Easy . . . Rev 0 11/04 Preface This manual serves to explain the use of the CON 500 transmitter. It functions in two ways, firstly as a step by step guide to help you to operate the transmitter. Secondly, it serves as a handy reference guide. It is written to cover as many anticipated applications of the transmitter as possible. [. . . ] Use the or keys to adjust the upper display to the calibration standard value. HOLD 1578 25. 5 µS °C ATC CAL HOLD 1578 1578 µS 4. CAL 5. Note: You can offset the conductivity reading within ± 40% from the default reading of the standard. The minimum allowable calibration point is 10% of the full scale reading of the range selected. 6. 1413 1578 µS Press the ENTER key to confirm the calibration value and to return to the measurement mode. Note: To exit this program without confirming the calibration, press the and keys together (Escape). Note: When there is a calibration error, the buffer icon and ERR annunciator will appear together with a blinking electrode icon. Press both and keys together TWICE to return to the measurement mode. - 12 - Instruction Manual CON 500 6 ADVANCED SETUP FUNCTIONS The advanced setup mode lets you customize your transmitter's preferences and defaults. This transmitter features different sub groups that organize all setup parameters. The sub-groups are: 6. 1 Range and Zooming Selection Setting Your CON 500 transmitter provides six selections of conductivity measurement ranges to suit your process application needs. Zooming selection is available where both the 4 mA and 20 mA output current can be assigned to specific conductivity values for a more refined output. Press the ENT key to enter the setup mode. Transmitter displays `SEt rng' indicating the range setup mode. The display will show the last set conductivity measurement range. Use the or keys to scroll through the six ranges and press the ENT key to select your desired range. The transmitter will now switch to the zooming selection and display the low zoom value setup. SETUP HOLD SETUP HOLD 2. 3. 1. 9 99 1 µS NOTE: Range 6 selection page will only appear in the setup mode when the cell constant is selected as K = 1. 0 or K = 10. Range 1 will only appear when cell constant is selected as K =0. 1 or K =1. 0 Six Range selection - 13 - Instruction Manual CON 500 4. For zooming setting, use the or keys to set the conductivity low zoom value for the 4 mA current and press the ENT key to confirm. The transmitter now displays the high zoom value setup. Use the or keys again to set the conductivity high zoom value for the 20 mA current and press the ENT key to confirm and return to the range setup mode. Press both and keys together to return to the measurement mode. SETUP HOLD 0. 00 L µS 5. SETUP HOLD 1. 9 99 Hi µS 6. - 14 - Instruction Manual CON 500 6. 2 Temperature Compensation Setting Conductivity readings are affected by temperature. Under varying temperature conditions, use ATC to compensate for the conductivity values. If temperature of sample is constant, and a temperature sensor/probe is not available, Manual Temperature Compensation can be utilized. 6. 2. 1 Automatic Temperature Compensation For automatic temperature compensation (ATC) selection, connect the ATC sensor to the transmitter, as described in Section 2. 2. 2. Press the ENT key to enter the setup mode. [. . . ] Press and keys together, to return to the measurement mode. 4. - 22 - Instruction Manual CON 500 7 FACTORY DEFAULT SETTINGS SETUP PAGE SET rng SET °C SET HLd SET org SET tPr SET CEL SET Lnr CAL ELE rSt FUNCTION Selection of effective conductivity range Setting low zooming selection Setting high zooming selection Selection of Automatic or Manual Temperature Compensation Selection of HOLD current to be of 22 mA or the last current output value Selecting Out of Range current output to be constant 3. 8 mA or 4mA for under range and 20 mA for over range Setting Temperature Coefficient Setting Normalization Temperature Selecting the various cell constant Setting the line resistance value Viewing current calibration point Viewing electrode's current cell constant Selection of calibration reset or factory default reset DEFAULT SETTING 1999 uS, r3 0 uS, Lo 1999 uS, Hi AtC On HLd OFF org OFF 2. 1% 25. 0 °C K = 1. 0 0. 00 --- ; r3 K = 1. 000; r3 rSt CAL; rSt FCt - 23 - Instruction Manual CON 500 8 TROUBLE SHOOTING GUIDE Cause a). Cables not in correct polarity (+ and ­ position). a) No temperature sensor connection during ATC mode a) Error in calibration Solution a). Re-wire loop cables with correct polarity. [. . . ]