28
8.
The current reading from the sensor is displayed on the far right of the top line.
When this reading has stabilised, use the Numeric Keypad to enter the same temperature as
measured by the mercury thermometer.
9.
Press the
key to calibrate the temperature readout.
Alternatively, press the
key to abort the second point temperature calibration. The first
point calibration settings will still be preserved.
10.
The
90-FL
is now Temperature calibrated and is ready for use in this mode.
The full ±0.2
O
C accuracy specification will apply after a successful 2 point calibration.
7.2 Temperature Calibration Notes
1.
Temperature calibration information is retained in memory when the
90-FL
is switched off.
This information can be recalled later using the GLP function (see section 8).
2.
Temperature does not need to be re-calibrated unless the Conductivity/TDS or Temperature
sensor is replaced or the meter is initialised.
7.3 Calibration Messages
1.
If a 1 point temperature calibration has been successfully performed, the
90-FL
will display the
following message and the offset value of the sensor. The bottom line appears after 3 seconds.
1 Point Calibration OK, Offset=0.1
o
c
Press Enter for Span Cal. or Menu Quits
2.
If a 1 point temperature calibration has failed, the
90-FL
will display the following message
and the failed offset value of the sensor.
1 Point Calibration Failed, Offset=16.0
o
c
3.
The
90-FL
has an allowable Offset range of -15.0 to +15.0
O
C
. If calibration fails due to the
Offset being outside these limits, then please consult the Troubleshooting guide (section 16.5)
for possible remedies.
4.
If a 2 point temperature calibration has been successfully performed, the
90-FL
will display the
following message and the span value of the sensor.
2 Point Calibration OK, Span=101.0%
5.
If a 2 point temperature calibration has failed, the
90-FL
will display the following message
and the failed span value of the sensor.
2 Point Calibration Failed, Span=200.0%
6.
The
90-FL
has an allowable span range of 93.0 to 107.0 %. If calibration fails due to the Span
being outside these limits, then please consult the Troubleshooting guide (section 16.5) for
possible remedies.