Thermo Fisher Scientific Alpha DO 500 - Manual (Page 31)

Instruction Manual Alpha DO 500
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5.4 Temperature Settings
Temperature settings allow you to enable or disable Automatic Temperature
Compensation (ATC) of the Transmitter.
Set the Transmitter to manual temperature compensation (disable ATC) when the
temperature of sample or process liquid is constant and a temperature probe is not
available. When you disable ATC, the Transmitter allows you to set your process
temperature (PºC) and calibration temperature (CºC). This allows calibration at a
different temperature other than the process temperature.
ENT
SETUP
HOLD
1
ENT
ENT
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
°C
ATC
SETUP
HOLD
°C
ATC
4
SETUP
HOLD
SETUP
HOLD
ENT
ENT
ENT
2
2
3
5 6
1 1
From measurement mode press ENT key to enter setup mode as
described in section 5.1. The LCD shows the first screen of setup mode
(COF). Press Ÿ or ź key to select temperature settings screen (SEt
ºC).
Press ENT key to access temperature settings (SEt ºC).
2
Enable/disable ATC: The upper display shows ‘AtC’. The lower display
shows the last configured ATC selection (‘On’ or ‘OFF’).
Press Ÿ or ź key to enable (AtC On) or disable (AtC OFF) automatic
temperature compensation.
Press ENT key to confirm your selection.
If ATC enabled (AtC On):
3
Setting temperature offset: The upper display shows the last
configured temperature offset value (if any), otherwise 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 Transmitter with the thermometer. If there
is a difference between the two readings (offset), you can adjust the
reading of the Transmitter. Press Ÿ or ź key to adjust the lower
display to the correct temperature value.