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. [. . . ] 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. The display shows the last measured value or [STbY]. Place the sample vial in the sample well. Wait for the reading to stabilize before rotating the sample vial. NOTE: During continuous measurement, the display is updated every 2 seconds. The displayed reading may not be the actual turbidity value. For accurate measurement, use single-shot measurement. You can rotate the sample vial for indexing purpose. 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. Ensure the vial sits properly into the sample well. 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. The meter is unable to recognize the 800 NTU Calibration Standard. The meter is unable to recognize the 100 NTU Calibration Standard. The meter is unable to recognize the 20. 0 NTU Calibration Standard. The meter is unable to recognize the 0. 02 NTU Calibration Standard. There is not sufficient signal to achieve the appropriate resolution in the 01000NTU range. [. . . ] Make sure the calibration vials are free of dust, smudges and scratches before use. Conduct the calibration in the same manner each time. Variations in how calibration is performed could yield inaccurate measurements. It is very important that the user(s) who perform calibration have been trained to do so. [. . . ]