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6 Setup
Mode setting (4)
Adjustment of the density
range (5)
Test key (6)
26
With the mode adjustment (min./max.) you can determine the output
current.
Note:
When using a controller, always set the mode switch (4) to max.
mode.
In this case, you select the requested mode according to the " Func-
tion table" (max. - max. detection or overfill protection, min. - min.
detection or dry run detection) on the controller.
When used on a control system, the following values apply:
•
Mode min./max.
– Vibrating element uncovered - 8 mA ±1.5 mA
– Vibrating element covered - 16 mA ±1.5 mA
With this DIL switch (5) you can set the switching point to liquids hav-
ing a density between 0.47 and 0.7 g/cm³ (0.017 - 0.025 lbs/in³). With
the basic setting, liquids with a density of ≥ 0.7 g/cm³ (0.025 lbs/in³)
can be detected. In liquids with lower density, you must set the switch
to ≥ 0.47 g/cm³ (0.017 lbs/in³). The specifications for the position of
the switching point relate to water - density value 1 g/cm³ (0.036 lbs/
in³). In products with a different density, the switching point will shift
in the direction of the housing or tuning fork end depending on the
density and type of installation.
Optionally the instrument can be also supplied with a min. density
range of ≥ 0.42 g/cm³ (0.015 lbs/in³). In this case, the max. permis-
sible process pressure is limited to 25 bar (363 psig).
Note:
Keep in mind that foams with a density ≥ 0.45 g/cm³ (0.016 lbs/in³)
are detected by the sensor. This can lead to erroneous switchings,
particulary when the sensor is used for dry run protection.
Note:
In case of intense boiling or bubbling processes as well as extreme
outgassing, the density of the gas/product mixture at the product
surface can be so low that it can't be detected by the sensor. This can
cause erroneous switchings.
With key (6) you can activate the test process. You interrupt the volt-
age supply as long as you are pressing the key. The test process will
be carried out after releasing the key.
6.3
Function table
The following table provides an overview of the switching conditions
depending on the set mode and the level.
Note:
Keep in mind that the mode switch of OPTISWITCH 5300 C must be
always set to "max.".
OPTISWITCH 5300 C • Two-wire 8/16 mA
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