HFT 2100
11
Status: 17.09.2012
HYDAC ELECTRONIC GMBH
Part No.: 669887
E
8 Troubleshooting tips
The transmitter does not produce an analogue signal:
1. No supply voltage
- Check supply voltage
2. Cable break / short circuit
- Check connecting cable and replace if necessary
3. Transmitter faulty
- Return instrument to manufacturer for investigation
The output signal does not correspond to the actual flow rate:
1. No medium-specific scale
- Return instrument to manufacturer for calibration
2. Pipe diameter incorrectly reduced
- Reduce cross-section according to Chapter 3.2
3. Instrument contaminated
- Clean the instrument
4. Instrument faulty
- Return the instrument for repair / calibration
9 Maintenance, Servicing and Care
Since there are few moving parts, the instruments are very low-maintenance.
Regular function checks and maintenance will increase not only the life expectancy and
function safety of the instrument, but also of the whole system.
The maintenance intervals depend on
- how contaminated the fluid is
- the environmental conditions (e.g. vibrations)
As regards maintenance, the following checks must be carried out, as a minimum:
- Function of the Hall sensor
- Leak-tightness of the instrument
- Free movement of the float
It is the responsibility of the operator to determine suitable maintenance intervals, depending
on the particular application.
Notes:
- The free movement of the float and the operation of the Hall sensor can be checked by
varying the flow and observing the output signal of the electronic unit.
- As regards cleaning, flushing through with clean fluid is sufficient in most cases. In cases
where the contamination is more difficult to remove (e.g. limescale deposits), commonly
available cleaning agents can be used, providing they are compatible with the materials of
the instrument.
