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Automatic (ATC): The conductivity probe has a built‑in temperature
sensor; the temperature value is used to automatically compensate the
EC/TDS reading. The “ATC” tag is displayed when this option is active.
Manual (MTC): The temperature value, shown on the secondary LCD,
can be manually set with the ARROW keys. The “ºC” tag blinks and
the “MTC” tag is displayed when this option is active. This value will be
used to compensate the EC/TDS reading.
No Compensation (notc): The temperature value is displayed, but not
taken into account. When this option is selected the “ºC” tag will blink
with slower frequency and the “NO TC” tag is displayed. The reading
displayed on the primary LCD is the uncompen‑
sated 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 is detected, ATC mode can not be selected and the instrument
displays “‑‑‑‑” on the secondary LCD.
If temperature compensation is selected, measurements are compensated
using the temperature coefficient (default value 1.90 %/ºC). To change
the temperature coefficient, enter the setup mode and select “tc” (see
SETUP for details, page 36). The current temperature coefficient can
be quickly viewed by pressing the ALT&TC keys. The value is briefly
displayed on the LCD.
• If the temperature reading exceeds the limits of the meter (–20.0 ºC
to 120.0 ºC), the “ºC” tag will blink and the closest full scale value
will be displayed.
TDS MEASUREMENTS
Press the ALT&MODE keys while in EC range. The instrument will switch
to TDS measuring range. The TDS reading will be displayed on the primary
LCD and the temperature reading on the secondary LCD.
• If the reading is out of range, the full‑scale value (100.0 g/L for MTC/
ATC mode or 400.0 g/L for uncompensated TDS) will be displayed
blinking.
• If LOCK was pressed and the reading goes out of range, the full‑scale
value of the frozen range will be displayed blinking.
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