6712FR Refrigerated Sampler

Section 6 SDI-12 Sondes

Select this screen to display the following:

NO SDI-12 SONDE

SETUP KNOWN SONDES

SCAN SDI-12 SONDES

Select “SETUP KNOWN SONDES” and then indicate the address of the sonde you want to setup. A screen containing the sonde model and number of data values will appear briefly. Then you will be asked to verify, parameter by parameter, what data you want to store. The screens will look similar to the one below:

6.6Sonde Calibration and Validation

SONDE 5, STORE

TEMPERATURE DATA?

YES NO

LABEL IS: TEMP5

Indicate if you want to store the data for that particular parameter and then advance through the rest of the parameter screens. Once you have defined your data storage options, select “DONE.”

You will be prompted that you have entered a new hardware setup and asked if you want to erase the stored data. Indicate “YES” or “NO.” A partition memory status message will be dis- played and (if a parameter exists that can be calibrated) you will then advance to the calibration screen (refer to “SONDE CALI- BRATION AND VALIDATION” on this page). If you do not want to calibrate or validate, select “DONE” to return to the Hardware Options screens.

It is recommended that calibration of your sonde be done in the lab, according to manufacturer’s recommendations.

However, for your convenience, the 6712 allows for field cali- bration of pH, Dissolved Oxygen (DO), and Oxidation Reduction Potential (ORP).

Field calibrations are stored in the sampler, NOT the sonde, and are used to modify readings from the sonde until a new sonde is connected. When a sonde is moved to another sampler, it will retain calibration constants set in the lab, but will not retain any that were set in the field.

Although field calibration is limited to three parameters, you can validate any of the available parameters. Validation allows you to immerse the sonde in a known solution, note the readings, and see if the sonde is functioning properly. The validation process does not modify any readings like calibration does; it merely alerts you to inaccurate ones.

No data will be stored, nor will enable conditions be updated, while calibrations or validations are being performed.

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Teledyne 6712FR manual Sonde Calibration and Validation