reedinstrumentswww com WARNINGWhile checking the MIN/MAX value for "Ex" don’t replace the probeor you will get an error code. If you don’t plug the probe into socketbefore turning the meter on, the error code will also appear when youcheck the MIN/MAX value.Note: Low battery power tends to give inaccurate readings, thereforemake sure you have enough power.CalibrationWARNINGS• You can exit the calibration procedure without saving the data inthe memory by pressing the "ON/OFF" button before step 4. Atstep 4, press the "ON/OFF" button to exit the calibration mode.• Auto power off is disabled in calibration mode.•. For the highest accuracy, the calibration should be operated at 23°C.• If the reading is out of 75.3% 0.5% at step 4, this indicates thecalibration has failed. See troubleshooting section below.1. Turn the meter off and plug the sensor probe into 33% salt bottle.Press the "ON/OFF + C/F " buttons for more than one second to entercalibration mode.2. "32.8%" will flash on the display, when "---.-" is showing on the display,that means the values are invalid in the calibration process. After 30min, the flashing will stop to indicate the procedure is finished.3. Move the sensor to 75% salt bottle and press "MN/MX" for more thanone second to enter 75.3% calibration. "75.3%" will flash .on the display.4. The flashing will stop after 30 minutes, at this point the entire .calibration is completed and the calibration data has been .saved in memory.www. GlobalTestSupply .comFind Quality Products Online at: sales@GlobalTestSupply.com