YSI 6 series Bedienungsanleitung PDF herunterladen (Seite 13)

OPTIMIZINGTHEPERFORMANCEOFTHE6136TURBIDITY

PROBEFORLOW‐TURBIDITY&FOULINGENVIRONMENTS

The following instructions will improve the measurement sensitivity of the YSI 6136 turbidity sensor in

low-turbidity environments in Unattended, SDI-12, and Discrete Sampling measurements. These

instructions were written specifically for YSI instruments and should not be cross-referenced to any

other manufacturer’s product.

WIPER PREPARATION

Remove the turbidity wiper from the probe to avoid any contamination of the standard. YSI 6136

turbidity sensor can operate with white, gray, or black plastic wipers. On the white and gray colored

wipers the three flat sides that are closest to the optics when properly parked will need to be painted or

colored black with a black indelible magic marker. The black color will eliminate any chance of stray

reflection from the infrared light source when the probe is making measurements. Black replacement

wipers can be purchased from YSI if you do not want to perform this step. Order p/n 606625.

If you operate your sonde in marine, estuarine, or other fouling environments, then the use of YSI’s anti-

fouling accessories is highly recommended. New copper alloy anti-fouling wipers, sensor guards, and

tape are now available for most YSI sondes and sensors. These new wipers eliminate the need to use

toxic paint and are virtually indestructible because of their metal construction. Contact your local YSI

sales office or YSI directly for applications assistance.

SONDE FIRMWARE

All YSI sondes must be updated to the latest released firmware available free at www.ysi.com. The

firmware version can be found in the sonde’s Status Menu. Your instrument must have version 3.06 or

higher for optimum optical sensor performance.

6136 TURBIDITY PROBE TYPES

All YSI optical probes have a manufacturing date code /lot number laser engraved into the case. 6136

probes with lot numbers starting with 02A (January 2002) to 07L (November 2007) have been built with

a reflection wiper parking system. This system bounces the IR signal off the bottom of the wiper and

uses the reflected signal to determine the wiper location and park it correctly. With this design it is

important to keep the wiper clean and free of biological fouling or mis-parks and/or spikes in the data

can occur. Starting in December 2007 (Lot 07M) a new wiper parking system was put in production that

uses a magnetic switch inside the probe to park the wiper. This new wiper parking system is not affected

by fouling.

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YSI 6 series Bedienungsanleitung Seite 13