OWNERS MANUAL Micro TPI Field Portable Turbidimeter HF scientific, inc. 3170 Metro Parkway Ft. Myers, FL 33916 Phone: 239-337-2116 Fax: 239-332-7643 Email: Info@hfscientific.com Manual Part No. 22666 (12/04) Rev. 1.
DECLARATION OF CONFORMITY Application of Council Directive Standard to which Conformity is Declared: Product Safety - Tested and passed CE EN61010-1:1990 + A1:1992 (73/32 EEC) Immunity and Emissions – Tested and passed EN61326:1997 + A1:1998 Manufacturer’s Name: HF scientific, inc.
Table of Contents DECLARATION OF CONFORMITY............................................................................................ i Specifications ................................................................................................................................. 1 1.0 Overview ............................................................................................................................ 2 1.1 Unpacking and Inspection of the Instrument and Accessories ........................
Specifications Measurement Range 0.01 –1100 NTU/FTU Accuracy ±2% of reading or 0.01 NTU (0-500 NTU) ±3% of reading (500-1100 NTU) Resolution 0.
1.0 Overview The MicroTPI (the instrument hereafter) allows you to measure turbidity in the field. This instrument was designed to meet the design criteria specified in ISO 7027 and DIN 27027 for the measurement of the turbidity of a sample. 1.1 Unpacking and Inspection of the Instrument and Accessories The table below indicates the items that you should find in your turbidimeter shipment.
Figure 1: Top view of the instrument. 1.2 The Display All of the items that can appear on the display are shown in Figure 2. The display is used for reporting the turbidity levels and to provide user guidance in the customer setting routine. In addition, the display also has several other blocks that are used to communicate error messages and provide user guidance. Figure 2 – Display used in the instrument. 1.3 The Instrument and Touch Pad The touch pad has five buttons: ON/OFF, CAL, ↵, t, and u.
2.0 Safety This manual 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. It is recommended that all operators should read this manual prior to working with this instrument. In certain instances NOTES, or helpful hints, have been highlighted to give further clarification to the instructions.
3.0 Normal Operation This instrument allows you to measure the turbidity of a grab sample. The turbidity is reported in Nephelometric Turbidity Units (NTU). Readings above 1100 NTU are outside the range of this instrument. During normal operation, the instrument will have the last valid turbidity reading indicated on the display (see illustration below).
Turn on the instrument by pressing the ON/OFF button continuously for 1 second. Allow 75-second warm-up period while preparing for the turbidity measurement as described in the following steps: 1. Sample approximately 100 ml of your process, as you would normally do for turbidity measurement. 2. Obtain a clean and dry sample cuvette. 3.
4.0 Instrument Calibration The instrument was calibrated and tested prior to leaving the factory. Therefore, it is possible to use the instrument directly out of the box. However, re-calibration of the instrument is recommended to help you become familiar with the operation of the instrument and the calibration procedures. In addition, re-calibration is recommended at least once every three months. The instrument requires four (4) standards to be fully calibrated.
2. While rotating the standard, observe the turbidity reading and locate the cuvette position with the lowest turbidity reading. 3. With the calibration standard positioned at the location having the lowest turbidity reading, install the Indexing Ring over the black light shield on the standard so that the pointer of the Ring aligns with the reference arrow on the instrument. 4.3 Calibration Procedures 1. Select the calibration function of the instrument by pressing the CAL button once.
5.0 Troubleshooting The instrument routinely performs self-diagnostics, and will automatically generate messages to provide you with specific diagnostic information. 5.1 System Warning Messages Automatic warning messages are generated to provide you with specific diagnostic information about the instrument. 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.
The following table lists the error messages and their associated meanings: Error ASSOCIATED MEANING TYPICAL CAUSE 1 Lamp failure Lamp has too low an output for proper turbidity measurement. 2 General Calibration failure: There is not sufficient signal between the 0.02 NTU and 10.0 NTU standards used for calibration Either the wrong standards were used in calibration or there is an internal sensor failure. 3 General Calibration failure: There is not sufficient signal between the 10.0 NTU and 100.
6.0 Routine Maintenance 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 cuvette fitted with a black cap has been placed in the sample well. This will ensure that a minimal amount of dust and/or debris will be able to settle on the optics of the instrument. 6.
6.2 Battery Replacement The instrument will periodically require new batteries to function properly. This will be indicated with a flashing battery indicator on the display. To replace the batteries: 1. Turn the instrument off and place it upside down on a soft surface. 2. Remove the two screws (A) securing the battery cover (B). Lift cover off. 3. Remove the old batteries. Place four new AAA batteries (C) into the battery compartment (ensuring the correct polarity). 4.
7.0 Accessories and Replacement Parts List The items shown below are recommended accessories and replacement parts for the instrument. Accessory Catalog Number Calibration Set for normal operation (includes 0.02 NTU, 10.0 NTU, 100.0 NTU and 1000 NTU Standards). 29855 Turbidity Free Water, 4 Liters (1gal.
8.0 Warranty The manufacturer warrants to the original purchaser of this instrument that it will be free of defects in material and workmanship, in normal use and service, for a period of one year from date of delivery to the original purchaser. The manufacturer’s obligation under this warranty is limited to replacing, at its factory, the instrument or any part thereof.
Glossary Formazin Nephelometric Units (FNU): see Nephelometric Turbidity Units Formazin Turbidity Units (FTU): see Nephelometric Turbidity Units Indexing a Cuvette: The United States Environmental Protection Agency (US EPA) recommends that cuvettes used for turbidimeter calibration or sample measurement be indexed. To index a cuvette with a sample in it, slowly rotate the cuvette throughout one complete revolution (360°).
