Description
During the 5X00622G01 calibration sequence, observe the valve to ensure it is moving, and that
it is moving in the proper direction. Also, review the calibration constants and
compare them with the ideal setup described below:
- The range of calibration values corresponds to the hexadecimal range of the AD
converter, and is presented to the user in decimal, 5X00622G01 ranging from -31768 to
- When an LVDT is properly adjusted and calibrated, the calibration constants
(0% and 100%) will be equal in amplitude and opposite in sign. The amplitudes
for this ideal setup would be approximately 30000. This result suggests the
following:
— The LVDT is adjusted so that its electrical null point (where secondary A
amplitude = secondary B) matches the 5X00622G01 midpoint of the mechanical stroke.
— The programmable gain amplififier on the demodulator is adjusted so that the
electrical “stroke” stays within the input range of the AD converter. Thus,
the valve positioner can detect incremental movement for all valve
positions.
— If thermal expansion occurs, the valve positioner will continue to detect
incremental movement because the calibration is not to the extreme end of
the AD converter range, and because the magnitude of thermal expansion is
small.
brand | Product Name | Product model | Order No |
EMERSON | modular | 5X00622G01 | nothing |
Place of Origin | Marketable land | Imported or not | defects liability period |
Europe and America | Nationwide and overseas | yes | a year |
Place of shipment | Delivery method | How to use | Applicable industries |
Xiamen | Shunfeng Express | Commissioning and installation | Power Plant Steel Plant Cement Plant Shipboard Papermaking |
Service advantages | Foreign import, goods preparation and supply | Reasonable price and reliable quality | Pictures are for reference only |
Product features | Primary source of goods, supply by model | After sales guarantee | Chen 1810693-7731 |
Rolled servo wires can 5X00622G01 cause the valve to move in the opposite direction. Be sure to
observe and verify the correct movement of the valve. If only one pair is rolled, then
the two pairs will be “fifighting” each other. Use the following procedure to simplify
diagnosis:
- Disconnect one pair of wires.
- Calibrate the valve, verifying the correct movement of the valve.
- Reconnect the fifirst pair of wires.
- Disconnect the other pair of wires.
- Calibrate the valve, verifying the correct movement of the valve.
- Reconnect all the servo wires.
- Calibrate the valve, verifying the correct movement of the valve.
The mechanical bias adjustment of the servo valve can affect the results of on-board
diagnostics. A set-screw on the servo valve causes a deflflection from center position
of the servo valve spool. This allows hydraulic flfluid to escape the actuator, and the
valve to close at controlled rate, in the absence of an electrical signal.
For a typical hookup, a small negative voltage 5X00622G01 on the servo valve is required to
center the spool, and hold the valve in a steady position. This voltage is typically
from -100 to -300 mV. Servo valves are delivered from the factory with this
adjustment. On board diagnostics assume that the servo valve is set up in this way.
If another setup is used, program the Ovation Controller to ignore the results of
diagnostic bits.
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