Delem
V0614, 3.10
•
Test procedure (Hoerbiger valves)
Figure 5.b
1. Move cursor to ‘Left valve deflection’.
2. Set ‘Left valve deflection’ at +10% by using the manual movement keys. To avoid
possible influence of hysteresis it is recommended to go first to +100% and than to the
re10%.
3. Move cursor to ‘Left valve LVDT’. This is the read out of the left proportional valve. The
value should be 8.0V. If not, then adjust this value with the manual movement keys.
4. Move cursor to ‘Left valve deflection’ again.
5. Set ‘Left valve deflection’ at -10% by using the manual movement keys. To avoid possible
influence of hysteresis it is recommended to go first to -100% and than to the required -
10%.
6. Move cursor to ‘Left valve LVDT’. This is the read out of the left proportional valve. The
value should now be 7.15V. If not, then adjust this value with the manual movement keys.
7. Repeat this procedure (step 1 through step 6) for the right proportional valve.
The
pressure valve
can be tested by measuring the current through the pressure valve at
several DA-points. With the manual movement keys you can regulate the valve deflection in
DA-points (0 DA = 0 mA). The current can be measured with an ammeter in series with the
pressure valve.
Note
The maximum allowed DA-points per installed current type of the pressure valve.
Failure
External electronics, wiring, valves or DA-52s.
End
Press the END-key to finish this test.
