Thermo Scientific Alpha pH 550 Manual page 30

Selecting unit of measurement for temperature: The upper
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display shows 'Unit' and the lower display shows the last configured
unit of measurement for temperature.
Press ▲ or ▼ key to select the desired units for temperature (ºC
or ºF). Press ENT key to confirm your selection.
Enable/disable ATC: The lower display shows 'AtC' and the upper
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display shows the last configured ATC selection ('On' or 'OFF').
Press ▲ or ▼ key to enable (ATC On) or disable (ATC OFF)
automatic temperature compensation. Press ENT key to confirm
your selection.
If ATC enabled (ATC On):
Setting temperature offset: The upper display shows the
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last configured temperature offset value (if any), otherwise the
default is zero. The lower display shows currently measured
temperature reading (including last configured offset value).
LCD shows 'ATC' annunciator in lower-right corner.
Place a thermometer, which is known to be accurate, in your
sample or process liquid. Make sure your temperature probe
is placed in the same liquid. Compare the stabilized
temperature reading displayed on the monitor with the
thermometer. If there is a difference between the two readings
(offset), you can adjust the reading of the monitor. Press ▲ or
▼ key to adjust the lower display to the correct temperature
value.
As the lower display value changes, the pH Monitor adjust the
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upper display reading automatically to suit the new offset
value. Up to ± 10 ºC/ ± 18 ºF offset is allowed.
Press ENT key to confirm the value. The pH Monitor reverts
to SET ºCF screen.
If ATC disabled (ATC OFF):
Setting process temperature: The lower display shows
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'P.ºC' and the upper display shows the last configured
process temperature. Press ▲ or ▼ key to adjust the upper
display to desired process temperature. Allowable range: –
10.0 to 125.0°C / 14.0 to 257°F.
Press ENT key to confirm the process temperature.
Setting calibration temperature: The lower display shows
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'C.ºC' and the upper display shows the last configured
calibration temperature. Press ▲ or ▼ key to adjust the
upper display to desired calibration temperature. Allowable
range: –10.0 to 125.0°C / 14.0 to 257°F.
Press ENT key to confirm the calibration temperature. The
pH Monitor reverts to SET ºCF screen.
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