hycom

Electro hydraulic servo test stands

The test stands are designed to perform maintenance tests on electro hydraulic servo valves according to the OEM standard SAE ARP490 and ARP490B. These systems are fully computerised to provide maximum control efficiency, leading to repeatability of test procedures and accurate test results.

The test stands include following subassemblies:
•control manifold with instrumentation
•frequency response cylinder
•weight 675kgs
•test station cubicle
•computer control console
•mobile trolley on 4 casters.

Main technical features
Test station cubicle:	with mounting pattern type D interface and subplates for type A1, A2, B and C.
Accuracy:	0.5% of measured flow.
Accuracy:	pressure transducers 0,25% of full scale.
Cooling system:	water.
Temperature accuracy:	0.5°C.
Analogue inputs:	16 bits/333 ks per second.
Analogue outputs:	12 bits/1000 ks per second.
Control system:	Hycom “Advantouch” control system with manual, semi- and full automatic test mode.
PLC system:	Siemens S7 slot PLC.
Data acquisition system:	National Instruments.
Software environment:	Windows XP Professional/Labview.
Servo current drivers:	± 10 mA, ± 60 mA.

Hycom model code:
Test stand version HSVTS	Fluid type C=phosphate ester L=mineral oil	Design number 38410

The HSVTS is suitable for following tests:
•pressure gain
•polarity
•null bias
•full flow gain loaded and unloaded
•frequency response
•hysteresis
•internal leakages
•proof pressure test.