INTRODUCTION Thank you for purchasing Apera Instruments TN500 Portable Turbidity Meter (hereafter referred to as the instrument). The instrument uses tungsten filament lamp as the light source and 90° scattering method, which is compliant with U.S EPA 180.1 method for the determination of turbidity in drinking, ground, surface, and saline waters, domestic and industrial wastes.
TECHNIC AL SPECI FIC AT IONS Specification Description Measurement 90° scattering measurement, U.S EPA180.1 compliant Method Light Source Tungsten filament lamp 0 to 1000 NTU (FNU), automatic range switch 0.01 to 19.99 NTU(FNU) Measuring Range 20.0 to 99.9 NTU(FNU) 100 to 1000 NTU(FNU) Accuracy ≤...
INSTRUMENTATIO N ILLUS TR ATION 3.1 Summary ① ② ③ ④ ⑪ ⑥ ⑤ ⑦ ⑧ ⑨ ⑩ Diagram-1 Flip cover of the sample vial holder (Close the Dust proof plug (Take off the plug when ⑦ ① cover when measuring) measuring) ⑧...
① Calibration Mode Calibration ② Standard values Menu ③ Operation guide ④ Finished calibration indicator ① Parameter Setup Parameter ② Menu Setup ③ Operation guide ① Data Recall ② Saved data numberings Data Recall ③ Saved data ④ Operation guide 3.4 Keypad Diagram-3 - 7 -...
Keypad Functions Power on/off In measurement mode, press to enter or exit calibration mode In parameter setup and data recall mode, press to return to measurement mode In measurement mode, short press to perform single measurement; long press (>3s) to perform continuous measurement.
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3.6 Data Log, Recall, and Deletion a) Manual data logging and Automatic data logging In parameter setup P4, users can select manual or automatic data logging mode. In the manual mode, after measurement is finished, press to save the data (also the measurement interface); In automatic mode, the data (also the measurement interface) will be automatically saved after each measurement.
c) Data Deletion Once the data storage is full, users need to delete the data in order to save new data. Select Yes in P5 in parameter setup and press to confirm the deletion (will delete all of the saved data, non- reversible).
② It's not necessary to use silicone oil for each calibration and measurement. Apply silicone oil every several days or once a week. In between, just clean the surface with filter paper or high- quality tissue paper. ③ Clean the calibration vial and sample vial together and keep the steps and actions consistent to achieve same degree of cleanliness.
4) After calibration is done, press to confirm. The instrument will return to the calibration menu (see Diagram on the right side). The OK sign indicates that 0 NTU has been calibrated and prompt to calibrate 20 NTU. 5) Place the 20.0 NTU calibration vial in the sample vial holder, press to start 20 NTU calibration.
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b) Calibration point selection: The instrument has been calibrated at full range before leaving the factory. For subsequent use, you can select 2 or more points as needed, as long as the estimated measurement range is between the two calibration points. In calibration setup mode, press to select the calibration point.
TURBIDI TY ME ASU REMEN T 5.1 Sample Vial Handling 6 sample vials are included in the test kit. The cap is marked with 1 to 6 , and the bottom of the vial also has the same number. The number of the vial and the cap should always be the same. *Pay attention that 1 and 2 vials are only for low turbidity solution measurement.
Diagram 9.2 Diagram 9.3 Diagram 9.1 c) We Recommend using TruRead Measurement Mode Turbidity measurement is a complex analytical measurement. Its error and stability are related not only to the design of the instrument, but also many other factors such as solution uniformity and precipitation, stray light, air bubble interference, sample vial contamination, optical errors, operation technology and more.
Avoid sample dilution for measurement as much as possible. Avoid operating under direct sunlight. Do not pour solution into the sample vial holder. Sample vials must be used for measurement. Please do not wash the sample vial holder as this may damage its optical structure. PAR AM ETER SETUP 6.1 Operation Press...
D ATA O UTPUT VI A USB PORT 7.1 Display Interface ① ② ③ Diagram 10 ①— Display area for saved data To display numberings, date, time, measurement method (normal measurement or continuous measurement), measured values, and measurement unit. For continuous measurement, average, maximum, and minimum values will also be displayed.
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7.3 Install Software The instrument uses Turbidimeter PC-Link communication software. It is only compatible with Windows- based operating system. The communication port is USB. Copy and paste the program files from the USB drive to the computer. Connect USB cable to the instrument and computer, open Turbidimeter PC- Link.exe, the instrument will connect with computer automatically.
L AMP REPL ACEM ENT 8.1 Light source check Observe the light source on the left side of the sample vial holder as in Diagram 11. Turn on the instrument, and press . The light source will light up for 5 seconds. If it’s not lighting up or it’s flashing, please replace the lamp.
We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS for a period of TWO YEARS for the instrument from the delivery.
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