The HI 98703 portable Turbidity Meter utilizes an EPA compliant tungsten light source and state-of-the-art optical system that allows consistently reliable and accurate measurements for turbidity. Users will appreciate the accuracy and sensitivity of this instrument, particularly at very low turbidity levels. To meet EPA reporting requirements these instruments have an EPA compliance reading mode. HI 98703 meets all EPA requirements with regards to the Standard Methods for Turbidity Measurements. It meets and exceeds the requirements of the USEPA Method 180.1 for wastewater and Standard Method 2130 B for drinking water. Depending on the measured sample and required accuracy, users can select normal measurement, continuous measurement or signal averaging. HI 98703 can be equipped with the (optional) Tag Identification System (TIS) which allows users to record the time and location of a specific measurement or series of measurements. Logged data can be downloaded to a PC through either USB or RS232 connections. Reliable performance of the instrument is validated using the meters' Cal Check system and NiST traceable chlorine standards. For turbidity, a two, three or four-point calibration is available using pre-set or user defined standards. Frequent Calibration isn't necessary as the system compensates for variations in the intensity of the light source. The instruments' Good Laboratory Practice functions allow traceability of calibration conditions including the time, date and last calibration points. At startup, the meter displays the percentage of remaining battery life. A 'low battery' warning message is also displayed on the LCD to avoid unexpected battery failure. This instrument is equipped with backlighting. The current date and time can be displayed on the LCD.
Range: 0.00 to 9.99; 10.0 to 99.9 and 100 to 1000 NTU
Range Selection: Automatic
Resolution: 0.01 NTU from 0.00 to 9.99 NTU; 0.1 NTU from 10.0 to 99.9 NTU; 1 NTU from 100 to 1000 NTU
Accuracy: ±2% of reading plus 0.02 NTU
Repeatability: ±1% of reading or 0.02 NTU, whichever is greater
Light Detection: Silicon Photocell
Method: Ratio Nephelometric Method (90°), ratio of scattered and transmitted light; Adaptation of the USEPA Method 180.1 and Standard Method 2130 B.
Measuring mode: Normal, Average, Continuous
Turbidity Standards: 1, 10, 100 and 750 NTU
Calibration: Two, three or four-point calibration
Light Source: Tungsten filament lamp
Lamp life: Greater than 100,000 readings
Logging Memory: 200 records
Supplied with (5) sample cuvets and caps, HI 98703-11 calibration cuvets, HI 93703-58 silicone oil, cuvet wiping tissue, (4) batteries, AC adapter, instruction manual and rugged carrying case.
The following link provides additional information from the instruction manual or original manufacturer's brochure. Right-click to open the PDF in a new window or download it: Hanna Instruments HI 98703 Portable Turbidity Meter