Tecfluid MX4 For FLOMAT Series - Manual (Page 31)

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The second row shows if the conductivity of the liquid is high enough for the instrument to
perform the measurement process.
The conductivity of the liquid should always be higher than 20 uS / cm .
The third row shows the differential voltage value on the electrodes (Vdif).
This voltage appears in some cases where chemical reactions are created on the surface
of the electrodes.
While this value does not exceed 0.5 V the flowmeter can work properly. If the value is
higher, there is no guarantee that the flow reading is correct. In this case, please contact
your distributor.
6.5.2 Simulator
With this diagnosis an electronic fault in the measuring circuit. can be checked.
Before checking, disconnect the electrodes from the converter. To do this, if the converter
is compact mounted, remove the electrodes IDC connector shown in the figure on page
15 (5-pin cable). If the converter is remote mounted, remove the electrodes wires
(terminals 18, 19 and 20) of the terminal strip on the back (p. 24)
Pressing Enter a screen indicating a simulated speed of the liquid is shown. If the circuit is
working properly the displayed value will be between 4 and 6 m/s.
To come back to the main menu, connect the electrodes cable again and press Escape
key.
Press again the Escape key until the working screen.
6
INSTALLATION PARAMETERS