Cond 7110
Conductivity
ba75927e05
12/2017
19
5.2
Calibration
5.2.1
Why calibrate?
Aging slightly changes the cell constant, e. g. due to coatings. As a result, an
inexact measured value is displayed. The original characteristics of the cell can
often be restored by cleaning the cell. Calibration determines the current value
of the cell constant and stores this value in the instrument.
Thus, you should clean and calibrate at regular intervals (we recommend:
every 6 months).
5.2.2
When to calibrate?
• When the cleaning interval has expired
• Routinely within the framework of the company quality assurance
5.2.3
Determining the cell constant (calibration in control standard)
This method can be used for measuring cells with cell constants in the following
ranges:
• 0.450 ... 0.500 cm
-1
• 0.800 ... 0.880 cm
-1
A 0.01 mol/L KCl solution is used as control standard.
1.
Open the calibration menu with
<CAL>
.
2.
If necessary, select the calibration type (
Cal Cell
) with
<CAL>
.
Cal Cell
is displayed.
3.
Confirm the selection of (
Cal Cell
) with
<MENU/OK>
or
<CAL
_
>
.
The cell constant of the last calibration is displayed.
L
C L
E
L
A
C
Summary of Contents for wtw Cond 7110
Page 1: ...OPERATING MANUAL ba75927e05 12 2017 Cond 7110 CONDUCTIVITY METER...
Page 2: ...Cond 7110 2 ba75927e05 12 2017 Copyright 2017 Xylem Analytics Germany GmbH Printed in Germany...
Page 6: ...Contents Cond 7110 6 ba75927e05 12 2017...
Page 42: ...Index Cond 7110 42 ba75927e05 12 2017...
Page 43: ......
