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Operating instructions
Conductivity measuring cell
Type LF 1
1
Description
The two-electrode measuring cells Type LF 1
thread and Type LFT 1
Pt 100 for temperature compensation serve the purpose of conductive measurement
of electrolytic conductivity in aqueous media. Connection to a measuring instrument is
made via a DIN 4-pin plug connector.
Important: The measuring cell must be placed in distilled or demineralized water
for 5 - 10 minutes prior to initial operation.
For correct measurement, particular care must be taken to ensure
that no air bubbles remain in the gap (i.e. between the measurement
electrodes)
Servicing/
Operation of the probe should be checked regularly and calibrated as
cleaning:
required. The gap between the measuring electrodes must be checked
regularly for dirt deposits. Any adhered deposits can be removed with the
aid of a soft water jet, by immersion for 2 - 3 minutes in diluted (1%
solution) acid or by wiping with a cloth or soft brush (e.g. toothbrush/
bottle brush).
Storage:
Dry
Installation: An adapter PG 13.5/1 (part No. 1002190) is necessary for installation in
the in-line probe housing Type DLG.
Particular care must be taken during installation to ensure that the
measuring electrodes are always completely covered with liquid medium.
32
Ø 12
/
/ LFT 1
1
2
1
/
(part No. 1001378) with
2
Technical Data
Cell constant:
Measuring range:
Medium temperature:
Max. pressure:
Thread:
Dimensions:
Storage temperature:
Electrodes:
Temperature sensor:
Cell stem:
Electrical connection:
Pin Assignments
and 2: Electrodes
1 and 3: Pt 100
Spare Parts
DIN plug connector: Part No. 1001414
Gasket: Part No. 1001415
/
2
1
/
(part No. 1001377) with
2
1
/
2
k = 1.0 cm
approx. 0.01 ... 20 mS/cm
0...80 °C
16 bar
1
/
2
Stem length
(up to push-and-twist connector)
120 mm; ø 12 mm
-5...50 °C
Special graphite
Pt 100 (integrated in cell stem)
in LFT 1
Glass fibre reinforced PPE
DIN 4-pin plug connector
type of enclosure IP 65
mounting thread and integrated
-1
(± 5 %)
1
/
only
2
1
/
mounting
2
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