YSI 30

The YSI Model 30 Handheld Salinity, Conductivity, & Temperature System is a rugged, micro-processor based, digital meter with an attached YSI four electrode conductivity cell. The Model 30 is designed for use in field, lab, and process control applications and is available with cable lengths of either 10, 25 or 50 feet. The body of the probe has been manufactured with stainless steel to add rugged durability and sinking weight. The large Liquid Crystal Display (LCD) is easy to read and is equipped with a back-light for use in dark or poorly lighted areas.

The Model 30's micro-processor allows the system to be easily calibrated with the press of a few keys. Additionally, the micro-processor performs a self-diagnostic routine each time the instrument is turned on. The self-diagnostic routine provides you with useful information about the cell constant, function of the instrument circuitry, and the quality of the readings you obtain. For a list of these diagnostic features, see Section 9, Troubleshooting.

The system simultaneously displays temperature (in oC), along with one of the following parameters: conductivity; temperature compensated conductivity; (in μS/cm or mS/cm), and salinity (in parts per thousand [ppt]). Though calibration is NOT required, a single calibration will adjust the instrument, regardless of which parameter you wish to read. You can switch back and forth from salinity, conductivity, and temperature compensated conductivity with a single push of the MODE key.
A probe storage chamber is built into the instrument. This chamber provides a convenient place to store the probe when the system is not in use, and provides protection for the electrodes within the probe.

The instrument is powered by six AA-size alkaline batteries. A new set of alkaline batteries will provide approximately 100 hours of continuous operation. When batteries need to be replaced, the LCD will display a "LO BAT" message.
The YSI Model 30 instrument case is waterproof (rated to IP65). You can operate your Model 30 in a steady rain without damage to the instrument.
The YSI Model 30M contains all the features of the Model 30, but has a 100ft cable length and also has internal memory for saving 50 sets of data for later on screen recall. It meets CE requirements for EMC Directive 89/336/EEC. For simplicity, this manual will refer to the Model 30 when discussing functions that apply to both the Model 30 AND the Model 30M. References to the Model 30M indicate functions that apply to the Model 30M ONLY.