AUTORANGING. Hanna Instruments HI 2300

Notes:

• If the meter displays “----”, the reading is out of range.

• If the stability indicator “~” blinks, the reading is unstable.

• Make sure the meter is calibrated before taking measurements.

• If measurements are taken successively in different samples, for accurate readings it is recommended to rinse the probe thoroughly with deionized water before immersing it into the samples.

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• TDS reading is obtained by 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 setup mode and selecting the “tdS” item (see SETUP for details).

When the use of an alternate function (SETUP, TC, GLP or CALT) is requested, press and hold the ALT key first, and then the second key.

A U T O R A N G I N G

The EC and TDS scales are autoranging. The meter automatically sets the scale with the highest possible resolution.

By pressing LOCK, the autoranging feature is disabled and the current range is frozen on the LCD. “1” tag starts blinking. To restore the autoranging option press LOCK again.

LOCK

Note: Autoranging is automatically restored if the range is changed, if the setup or calibration modes are entered, or if the meter is turned off and back on again.

T E M P E R A T U R E C O M P E N S A T I O N

Three options of compensating temperature are available:

Automatic (Atc): The EC probe has a built-in temperature sensor; the temperature value is used to automatically compensate the EC/TDS reading

(from –9.9 °C to 120.0 °C), using the selected reference temperature.

Manual (Mtc): The temperature value, shown on the secondary LCD, can be manually set with the ARROW keys. The compensation is referenced at the selected reference temperature. The “°C” tag blinks when this option is active.

No Compensation (notc): The temperature value shown on the secondary LCD is not taken into account. The reading displayed on the primary LCD is the actual

EC or TDS value. The “°C” tag blinks when this option is active.

Note: The default compensation mode is ATC.

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