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Conditions Operation of the sensor is stable (no possible drift or fluctuating
Zero point calibration A zero point calibration is only required at the lower limit of the
Slope test
ProMinent
®
measured values during a minimum period of 5 minutes). This is
generally guaranteed when the following conditions are fulfilled:
• the H
O
concentration of the sample water is isochronically
2
2
sufficiently constant (please note the sensor's response time of
8 min!)
• the relevant running-in time has been allowed (see section 8.1
Running-in time).
• permitted flow is present in the in-line probe housing (see section
14 Technical data).
• Temperature compensation is given between sensor and sample
water (wait approx. 15 minutes).
measuring range.
IMPORTANT
• After an initial commissioning, check calibration after 24
hours.
• Repeat calibration if the H
than 15 % from the reference value.
On photometry:
If not yet installed, install the sensor into the in-line probe DLG III
or DGM (see Chap. 6 Mounting)
Perform sampling. This must be performed in direct proximity to
the sensor. Recommendation: in case of the in-line probe DGM
use the sampling valve (see Fig. 2 and Order notes, Chap. 15).
Determine the H
2
Photometer (please observe operating instructions! E.g. use the
Photometer DULCOTEST
Set the determined H
device according to its operating instructions (see operating
instructions DULCOMETER
Chap. 8, Complete operating menu, Setting menu "Calibrate
H
O
").
2
2
O
concentration varies by more
2
2
O
concentration as quickly as possible with a
2
®
DT3).
O
concentration in ppm at the control
2
2
®
D1C, measured variable H
Commissioning
O
,
2
2
37
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