Precision Turbidity and Free/Total Chlorine Meters
HI 83414 and HI 88703 are precision meters designed for high accuracy turbidity measurement in water quality applications. Both instruments are designed to meet or exceed the criteria specified by the USEPA Method 180.1 and Standard Method 2130 B. The HI 83414 combines turbidity and colorimetric measurements to test turbidity and free/total chlorine, while the HI 88703 measures turbidity only.
Overview
These instruments utilize the nephelometric method to measure turbidity, the optical property that causes light to be scattered and absorbed rather than transmitted. The optical system includes a tungsten filament lamp, a scattered light detector (90°) and a transmitted light detector (180°). The microprocessor calculates the NTU value using an effective algorithm that corrects and compensates for interferences of color, making both meters color-compensated. The optical system and measuring technique also compensate for lamp intensity fluctuations, minimizing the need for frequent calibration.
In ratio turbidimeter range, the instrument calculates NTU value from signals reaching both detectors. In non-ratio turbidimeter range, the NTU value is calculated from the signal on the scattered light detector (90°), offering high linearity on the low range but with more sensitivity to lamp intensity fluctuations. The optical system is designed to have very low stray light, providing accurate results for low turbidity samples.
Features
- HI 83414 features 4 measuring ranges: Ratio Turbidity; Non-Ratio Turbidity; Free Chlorine; Total Chlorine
- HI 88703 features 2 measuring ranges: Ratio Turbidity; Non-Ratio Turbidity
- Meets USEPA requirements
- Exclusive chlorine CAL CHECK™ calibration validation for HI 83414
- Good Laboratory Practice capabilities
- 2, 3, 4 or 5 point turbidity calibration
- USB PC connectivity
- Backlit LCD
- On-screen tutorial modes
- Log and recall up to 200 measurements
- Contextual help menus
- Auto shut-off
Measuring Capabilities
Turbidity measurements can be made in the 0.00 to 4000 NTU (Nephelometric Turbidity Units) range when ratiometric measurements are used and in the 0.00 to 40.0 NTU range when non ratio method is used. The instruments have an EPA compliance reading mode which rounds the reading to meet EPA reporting requirements. Alternative EBC and Nephelos measuring units are available. Depending on the measured sample and needed accuracy, normal measurement, continuous measurement or signal averaging measurement can be selected.
A two, three, four or five-point calibration can be performed using the supplied standards (
CAL CHECK™ Function
The HI 83414 features the CAL CHECK™ function, which allows reliable performance validation at any moment using exclusive HANNA ready-made, NIST traceable standards. A one-point calibration can be performed using the same CAL CHECK™ standard. The HI 83414 free and total chlorine colorimeter CAL CHECK™ function allows the user to check the instrument calibration against a NIST traceable standard before making a set of measurements, and the instrument can be re-calibrated if necessary.
GLP and Data Management
Both meters have complete G.L.P. (Good Laboratory Practice) functions that allow traceability of the calibration conditions. The last calibration points, time and date can be checked. The instrument's logging function offers complete information for the measurement. Up to 200 measurements can be stored in the internal memory and consulted at any time. For further storage or analysis options, data can be downloaded to a PC using the USB port.
User Interface
Both meters incorporate a user-friendly interface with an easy to understand, graphic LCD. All messages are in plain text making them easy to read and understand. Comprehensive contextual help is available at the press of a button. All messages and help screens are available in several languages. Confirmation and error acoustic signals help the user during instrument operation. A tutorial mode of operation guides the user step by step through the analysis process, providing additional information to help the inexperienced user during measurements.
Turbidity Specifications
| Parameter |
Specification |
| Range—Non Ratio Mode |
0.00 to 9.99; 10.0 to 40.0 NTU
0.0 to 99.9; 100 to 268 Nephelos
0.00 to 9.80 EBC |
| Resolution—Non Ratio Mode |
0.01; 0.1 NTU
0.1; 1 Nephelos
0.01 EBC |
| Range—Ratio Mode |
0.00 to 9.99; 10.0 to 99.9; 100 to 4000 NTU
0.0 to 99.9; 100 to 26800 Nephelos
0.00 to 9.99; 10.0 to 99.9; 100 to 980 EBC |
| Resolution—Ratio Mode |
0.01; 0.1; 1 NTU
0.1; 1 Nephelos
0.01; 0.1, 1 EBC |
| Range Selection |
Automatic |
| Accuracy |
±2% of reading plus 0.02 NTU (0.15 Nephelos; 0.01 EBC)
±5% of reading above 1000 NTU (6700 Nephelos; 245 EBC) |
| Repeatability |
±1% of reading or 0.02 NTU (0.15 Nephelos; 0.01 EBC) whichever is greater |
| Stray Light |
|
| Light Detector |
Silicon Photocell |
| Method |
Nephelometric method (90°) or Ratio Nephelometric Method (90° & 180°), Adaptation of the USEPA Method 108.1 and Standard Method 2130 B. |
| Measuring Mode |
Normal, Average, Continuous |
| Turbidity Standards |
|
| Calibration |
Two, three, four or five-point calibration |
Free and Total Chlorine Specifications—HI 83414 Only
| Parameter |
Specification |
| Range |
Free Cl2: 0.00 to 5.00 mg/L
Total Cl2: 0.00 to 5.00 mg/L |
| Resolution |
0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 above 3.50 mg/L |
| Accuracy |
±0.02 mg/L @ 1.00 mg/L |
| Detector |
Silicon photocell with 525 nm narrow band interference filters |
| Method |
Adaptation of the USEPA Method 330.5 and Standard Method 4500-Cl G. |
| Standards |
1 mg/L free chlorine, 1 mg/L total chlorine |
| Calibration |
One-point calibration |
General Specifications
| Parameter |
Specification |
| Light Source / Life |
Tungsten filament lamp / Greater than 100,000 readings |
| Display |
40 x 70 mm graphic LCD (64 x 28 pixels) with backlight |
| LOG Memory |
200 records |
| PC Interface |
USB |
| Auto Shut-off |
After 15 minutes of non-use |
| Environment |
0°C (32°F) to 50°C (122°F); max 95% RH non-condensing |
| Power Supply |
230 V/50 Hz or 115 V/60 Hz 20 W |
| Dimensions / Weight |
230 x 200 x 145 mm (9 x 7.9 x 5.7") L x W x H / 2.5 Kg (88 oz.) |
Ordering Information
HI 88703-01 (115 V) and HI 88703-02 (230 V) are supplied with (5) sample cuvets and caps, calibration cuvets, silicone oil (HI 93703-58), tissue for wiping cuvets, power cord and instruction manual.
HI 83414-01 (115 V) and HI 83414-02 (230 V) are supplied with (5) sample cuvets and caps, calibration cuvets for turbidimeter and colorimeter (HI 83414-11), silicone oil (HI 93703-58), tissue for wiping cuvets, scissors, power cord and instruction manual.
Solutions
- HI 93414-11 CAL CHECK™ Calibration set for Free & Total Chlorine
- HI 93701-01 Reagents for 100 Free Chlorine tests
- HI 93701-03 Reagents for 300 Free Chlorine tests
- HI 93711-01 Reagents for 100 Total Chlorine tests
- HI 93711-03 Reagents for 300 Total Chlorine tests
- HI 88703-11 Calibration set for turbidimeter (
- HI 93703-50 Cuvet cleaning solution, 250 mL
Accessories
- HI 93703-58 Silicone oil (15 mL)
- HI 731318 Tissue for wiping cuvets (4)
- HI 731331 Glass cuvets (4)
- HI 731335N Caps for cuvets (4)
- HI 740234 Replacement lamp for EPA turbidimeter
- HI 92000 Windows® compatible software
- HI 920013 USB cable for PC connection
