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20.
TEMPERATURE OPERATION
The thermistor sensor used for automatic temperature compensation and measurement is accurate and
stable, so frequent calibration isn't required. Temperature calibration is recommended upon electrode
replacement, whenever the temperature reading is suspect, or if matching against a certified thermometer
is desired.
The maximum adjustable value is ±5 °C or ±9 °F from the factory default temperature value.
If an automatic temperature compensation (ATC) probe is not connected, a Warning message will pop up
indicating that Temperature probe has not been connected and return to measurement.
Follow The Steps Below To Standardize Temperature:
1. Connect the ATC probe and place it into a solution with a known accurate temperature
such as a constant temperature bath. The temperature probe may be independent or
part of a pH, or conductivity, or DO electrode. Note that pH electrodes with built-in ATC
will have separate connections for pH (BNC) and ATC (mini-phone). Conductivity and
DO electrodes do not have separate ATC connections. For multi-channel instruments,
ensure that your electrode is connected to the corresponding ATC channel which you
are viewing.
2. When the temperature reading is stable, select Standardize from any measure screen,
and then select the Temp Std. icon.
3. The upper display shows the current factory default temperature without standardization,
while the lower display will be the new standardization temperature.
4. To enter a new Standardization Temperature, select the box and enter value using the
keypad that will appear.
5. Select OK to accept the new temperature.
Ion Operation: Incremental Methods
XL25, 50 and 60 meters
26
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