Nova-Tech 2700 Series Benchtop Meters - Manual (Page 22)

18
9. Temperature Calibration
The thermistor sensor used for automatic temperature compensation and
measurement is both accurate and stable, so require 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.
1) Connect the temperature probe to the meter and place into a solution with a
known accurate temperature such as a constant temperature bath.
The temperature probe may be separate or built into a pH, Conductivity, or
Oxygen electrode. The PC 2700 has two temperature sensors available—one
built into Conductivity, and another for use with the BNC connection.
2) When the reading is stable, press CAL from any mode, then press
.
3) The upper display shows the active temperature while the lower display shows
the factory default temperature without calibration. The example below at right
shows a temperature calibration that had previously been calibrated with a 3.0
ºC offset.
3) Adjust the upper display using up/down arrows, press ENTER to accept the
calibration temperature. The maximum adjustable value is ±5 ºC (or ± 9 ºF)
from the factory default temperature value.
Additional temperature calibration notes:
For Manual Temperature Compensation (MTC) the procedure is the same
although the maximum adjustable value is the full temperature range of the
parameter, and connection of a separate ATC probe is not necessary.
For nearly all applications however, ATC is recommended.
If calibration is performed, be sure that the thermometry source used as a
reference is accurate!