User manual HANNA INSTRUMENTS HI 83140

[. . . ] Note: Conserve all packing material until the instrument has been observed to function correctly. Any defective item must be returned in its original packing. This Instrument is in w w w . c o m Compliance with the CE Directives WARRANTY All Hanna Instruments meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. The electrodes and the probes are warranted for a period of six months. [. . . ] A low battery level may also result in unreliable measurements. It is recommended to replace the battery soon. Unscrew the 3 screws on the back of the meter, remove the battery cover and replace the battery while paying attention to its polarity. Replacement must only take place in a non-hazardous area using an alkaline 9V battery. OPERATIONAL GUIDE The meter is supplied complete with a 9V battery. Remove the battery compartment cover on the back of the meter, install the battery while paying attention to its polarity. Always remove the electrode protective cap before taking any measurements. If the electrode has been left dry, soak the tip in HI 70300 Storage Solution for half an hour to reactivate it. Connect the pH electrode to the DIN connector on the top of the instrument and remove the protective cap. Turn the meter ON by pressing the ON/OFF key. pH CALIBRATION For greatest accuracy, frequent calibration of the instrument is recommended. The instrument should be recalibrated for pH: a) Whenever the pH electrode is replaced. e) Whenever requested by the Probe Check. PROBE CHECK FEATURE CLEAN & CAL PROCEDURE The unique Probe Check feature allows the user to check the probe status at any time. Simply follow the below procedure to check if the response of your electrode is still satisfactory or maintenance is needed. · Rinse thoroughly the probe with water. · Immerse the probe in HI 50021 Check Solution. Note: If the reading is around pH 4. 0, the probe is broken and has to be replaced. · Wait a couple of minutes and then press the CHECK key. · If the green LED lights up, the electrode can still be used. · If the red LED lights up, Cleaning is needed: 1. immerse the probe in HI 700661 Cleaning Solution for 5 minutes, then rinse it with tap water; 2. immerse again in HI 50021 Check Solution and press the CHECK key; 3. if the green LED lights up, the electrode can still be used; 4. if the red LED lights up, calibrate the meter (see "pH Calibration"). [. . . ] · Wait a couple of minutes and adjust the SLOPE trimmer on the lower right of the front panel until the pH LCD shows the pH SLOPE value at the noted temperature. The pH calibration is now complete. ACCESSORIES HI 121700 amplified, combination pH-electrode with builtin temperature sensor and DIN connector HI 3618D amplified, combination, Platinum ORP-electrode with built-in temperature sensor and DIN connector HI 4619D amplified, combination, Gold ORP-electrode with built-in temperature sensor and DIN connector HI 70004P pH 4. 01 buffer sachet, 20 mL (25 pcs) HI 70007P pH 7. 01 buffer sachet, 20 mL (25 pcs) HI 70010P pH 10. 01 buffer sachet, 20 mL (25 pcs) HI 70300M Storage Solution, 230 mL bottle HI 700661P Cleaning Solution, 20 mL sachet (25 pcs) HI 50021P Check Solution, 20 mL sachet (25 pcs) HI 7082 3. 5M KCl Electrolyte, 4 x 50 mL HI 7091M Reducing Pretreatment Solution, 230 mL bottle HI 7092M Oxidizing Pretreatment Solution, 230 mL bottle HI 731326 Calibration screwdriver (20 pcs) ISTR83140 12/02 TAKING ORP MEASUREMENTS Connect the ORP electrode to the DIN connector on the top of the meter and remove the protective cap. Turn the instrument ON and enter the mV (ORP) mode by pressing the mV key. Submerge the ORP electrode tip (at least 4 cm/1½") into the solution to be tested, stir gently and wait a few minutes for the reading to stabilize. TAKING TEMPERATURE MEASUREMENTS Turn the instrument ON, press the °C key and allow the reading to stabilize. [. . . ]