Instruction Manual Mi 306 EC/TDS Meter
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Make sure the meter is calibrated before taking measurements.
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If measurements are taken successively in different samples, to have accurate readings it is
recommended to rinse the probe thoroughly with deionized water before immersion in the
samples.
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To maximize battery life, the meter is automatically switched off after 5 minutes of non-use. To
reactivate the instrument press the ON/OFF key. This feature can be disabled by entering the
setup mode and selecting the "AoF" item (see SETUP section for details).
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TDS reading is obtained multiplying the EC reading by the TDS factor, which has a default
value of 0.50. It is possible to change the TDS factor in the 0.40 to 0.80 range by entering
the setup mode and selecting the "tdS" item (see SETUP section). Always set the reference
temperature to 25°C when measuring TDS.
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When the use of an alternate function (MR, SETUP, CFM, FIXED, TC and HOLD) is
requested, press and hold the SHIFT key first and then the second key.
AUTORANGING
The EC and TDS scales are autoranging. The meter automatically sets the scale with
the highest possible resolution.
By pressing SHIFT+FIXED, the autoranging feature is disabled and the
current range is frozen on the LCD. "FIXED" symbol blinks on the LCD.
To restore the autoranging option press SHIFT+FIXED again.
Note: Autoranging is automatically restored if the RANGE key is pressed, if the setup or
calibration modes are entered and if the meter is turned off and back on again.
AUTO ENDPOINT MODE
The Auto Endpoint feature allows the user to freeze the display, when a stable reading is
reached (EC/TDS/NaCl and temperature range).
To enter the Auto Endpoint mode, press SHIFT+HOLD keys.
