YSI CarboVis 705 IQ - Manual (Page 31)

CarboVis 70x IQ
Measuring / Operation
4 - 7 ba75950e02 11/2012
Performing a user
calibration
Proceed as follows if you want to perform a user calibration:
In the Settings of sensors and diff. sensors menu, set the Signal
smoothing setting to Off .
Subsequently, leave the menu with Save and quit .
How to navigate to the Settings of sensors and diff. sensors menu and
the operation of the menu is described in section 3.4.3.
At least one value pair and a maximum of two value pairs can be
entered for a valid calibration. The values must be in ascending order.
If they are not in ascending order, a calibration error will occur.
The entry of calibration values outside the measuring range leads to a
calibration error.
1. Bring the sensor into the measuring position.
2. Switch to the measured value display with <M>.
3. Wait for a measurement, read the raw value (without dimen-
sion) and note it down. In the case of fluctuating values,
observe several measuring cycles and average the individual
raw values.
4. Take a sample at the same time as the measurement and as
close to the UV-VIS sensor as possible.
5. Determine the reference value and note it down as a value pair
together with the raw value.
6. For a two-point calibration:
Determine the second value pair (step 4 to step 6).
7. Sort the values pairs in ascending order.
8. In the Settings of sensors and diff. sensors menu, enter the
value pair or pairs (see the following table).