Hanna-instruments HI 255 Manual de usuario descargar pdf (Pagina 10)

 If LOCK was pressed to freeze the LCD range and the reading went out of

range, the full-scale value of the frozen range will be displayed blinking.

The EC reading is affected by temperature.

Three options of compensating temperature are available, on EC measurement

mode.

Note: The compensation is referenced at the selected reference temperature

(see SETUP for details, page 31).

Automatic (Atc): The EC probe has a built-in temperature sensor; the

temperature value is used to automatically compensate the EC/TDS reading

(from 0.0  60.0 ºC).

Manual (Mtc): The temperature value, shown on the secondary LCD, can be

manually set with the ARROW keys. The ºC tag blinks when this option is active.

No Compensation (notc): The temperature

value is displayed, but is not taken into account

and ºC tag blinks with a higher frequency.

The reading displayed on the primary LCD is the

actual EC or TDS value. To select the desired

option, press the ALT&ATC keys until the option

is displayed on the LCD.

Note: • The default compensation mode is Atc.

• If no temperature probe detected, Atc mode can not be selected

and the instrument displays ---- on the secondary LCD.

If temperature compensation is active, measurements are compensated using the

temperature coefficient (default value 1.90 %/ºC). To change the temperature

coefficient, enter the setup mode and select the tc item (see SETUP for details,

page 31). The current temperature coefficient can be quickly viewed by pressing

the ALT&TC keys. The value is briefly displayed on the secondary LCD.

 If the temperature reading is out of 0.0  60.0 ºC interval and Atc option is

selected, the ºC tag will blink and the closest interval limit will be displayed.

 Press the ARROW keys to change the displayed temperature value. This

value is used to compensate the EC/TDS reading.

TDS MEASUREMENTS

Press the ALT&MODE keys while in EC range. The instrument will switch to TDS

measuring range. A TDS reading will be displayed on the primary LCD and the

temperature reading on the secondary LCD.

ALT

ATC

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Hanna-instruments HI 255 Manual de usuario Pagina 10