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5.6 Calibration Messages
1. If a one point offset calibration has been successfully performed, the
WP-87
will display the following message and the offset value of the
probe(s). The bottom line of the display shows each channel as it is
calibrated (see example below).
Do not remove the probe(s) from
the water bath until all channels have been displayed.
.
Calibrate OK
A:Offset= 1.0
o
c
2. If a one point offset calibration has failed, the
WP-87
will display the
following message, and the failed offset value of the probe(s). The
bottom line of the display shows each channel as it is calibrated (see
example below).
Do not remove the probe(s) from the water bath
until all channels have been displayed.
Calibrate Failed
A:Offset= 10.5
o
c
3. If a span calibration has been successfully performed, the
WP-87
will
display the following message and the offset and span values of the
probe(s). The bottom line of the display shows each channel as it is
calibrated (see example below).
Do not remove the probe(s) from
the water bath until all channels have been displayed.
.
Calibrate OK
A:Offset= 1.0
o
c
then
Calibrate OK
A:Span= 100.0%
4. If the temperature of the water bath used for span calibration is less
than 10
O
C, 20
O
F or 10
O
Kelvin different to the first point, the following
message will be displayed.
Temp Difference
Too Small
The
WP-87
then gives the user the opportunity to try a span calibration
again. Repeat the calibration procedure from step 10 onwards (section
5.4), ensuring that the temperature of the second calibration point is at
least
10
O
C, 20
O
F or 10
O
Kelvin higher or lower than the first point.
