Xylem WTW Turb PLUS 2000, Руководство по эксплуатации

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Setup , Configuration and Calibration Turb PLUS 2000
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6.3.1 Calibration Standards (0-100 NTU range)
If the Turb PLUS 2000 will be used over the entire range of .02 to 100 NTU a complete calibration
as described below will be required, but you must retain the same calibration schedule as
described above. If instrument accuracy is only required below 10 NTU, such as for potable water,
a calibration may be performed using only a 10 NTU and a 0.02 NTU standard.
We recommend that the following materials be used during calibration to achieve the full-scale
accuracy stated in this manual:
• 100 NTU
ProCal
Calibration Standard available from Xylem Analytics Germany
• 10.0 NTU
ProCal
Calibration Standard available from Xylem Analytics Germany
•
0.02 NTU
ProCal
Calibration Standard available from Xylem Analytics Germany
6.3.1.1 Alternate Ranges
If the range is changed from the factory setting of 0-100 NTU the instrument
must be recalibrated.
The calibration values will be 10 NTU, 1 NTU and .02 NTU for 0-10 NTU range. The instrument
will prompt for the appropriate standards.
The calibration values will be 1000 NTU, 10 NTU and .02 NTU for 0-1000 NTU range. The
instrument will prompt for the appropriate standards.
Calibration kits are available for the optional ranges.
Make changes as needed to the instructions in section 4.3.3 below.
It is well known that diluted Formazine is unstable. If Formazine is used to
calibrate the instrument, ensure that a fresh stock suspension of Formazine is
used to achieve the accuracy quoted for the instrument.
The WTW primary calibration standards are more stable than Formazine and have a minimum
shelf life of 12 months. Prior to recalibration, review the expiration dates, to ensure that the
standards have not expired.