User manual EUTECH INSTRUMENTS WATERPROOF TN100 TURBIDIMETER

[. . . ] Instruction Manual TN-100/ T-100 Portable Turbidimeter 68X357701 Technology Made Easy . . . Rev. 1 10/03 Preface This manual functions in two ways: first as a step by step guide to help you operate the waterproof TN-100/ T-100 turbidimeter; second, it serves as a handy reference guide. It contains basic instructions that you must follow during the operation, care and maintenance of the instrument. The safety protection provided by this equipment may be impaired if it is used in a manner not described in this manual. [. . . ] Make sure the meter is sitting on a flat and level surface and is in measurement mode. The display shows the last measured value or [STbY] after exiting calibration mode. The display will blink [--Rd--] for 10 times or more and then display the measured value. SAMPLE Unknown NTU READ ENTER Press key and release immediately Place vial into the sample well Flashes about 10 times NTU Figure 12: Single-shot measurement 13 Instruction Manual TN-100/ T-100 For continuous measurement: 1. Make sure the meter is sitting on a flat and level surface and is in measurement mode. NOTE: During continuous measurement, the display is updated every 2 seconds. See Section 8. 5 SAMPLE Indexing a Vial on page 20 for more Unknown information. Once you release the READ/ENTER sample well READ key, the meter will automatically ENTER You can turn perform a single-shot measurement. Press and hold the vial for indexing NTU NOTES: 1. After a measurement is completed and the display is updated, a 4-second recovery time occurs before the meter can perform another function. If any key is pressed during the recovery time, the meter will perform the corresponding action at the end of the recovery period. When performing a measurement, if the meter detects stray light exceeding the amount equivalent to 0. 02 NTU in the low range, the measurement is immediately aborted and an error message [ERR 8] is displayed. Press the ENTER/READ key to re-do the measurement. Figure 13: Continuous measurement 14 Instruction Manual TN-100/ T-100 4 TROUBLESHOOTING GUIDE The TN-100/ T-100 turbidimeter routinely performs self-diagnostics, and will automatically generate messages to provide you with specific diagnostic information. These messages are for your use and do not indicate a reduction in the performance of the instrument or a failure of any component in the instrument, unless otherwise stated in this list. LCD Message ERR 1 Description Calibration Error. There is not sufficient signal to achieve the appropriate resolution in the 01000NTU range. There is not sufficient signal to achieve the appropriate resolution in the 0100NTU range. There is not sufficient signal to achieve the appropriate resolution in the 020 NTU range. ERR 8 ERR 9 Or Attempting a measurement when low battery indicator is on. When Turbidity value is above the measurement range(>1000NTU) Low battery indication. Corrective Actions Ensure to use the correct 800 NTU calibration standard. * ERR 2 ERR 3 ERR 4 ERR 5 ERR 6 Re-do calibration with all 4 standards provided. Replace batteries. * If an error message appears, take the appropriate corrective action and re-do the desired procedure. See Sections on Warranty and Return of Items on page 24. 15 Instruction Manual TN-100/ T-100 5 ROUTINE MAINTENANCE The supplied carrying case is optimal for protecting the instrument. If you do not plan on leaving the instrument in the supplied carrying case, when not in use, ensure that the instrument has been turned off and that a clean sample vial fitted with a black cap has been placed in the sample well. [. . . ] Changes in temperature can cause precipitation of soluble compounds and affect readings. Sample vials should be evaluated with a low turbidity water (after cleaning) to determine if cells remain matched. If the evaluation determines that a cell is corrupted, discard the vial. When in doubt or question about whether a sample vial is too scratched or stained, throw it away. 22 Instruction Manual TN-100/ T-100 9. 6 Calibration 1. [. . . ]