LYTH-CONS CONSISTENCY TRANSMITTER

Transkriptio

1 LYTH-CONS CONSISTENCY TRANSMITTER LYTH-INSTRUMENT OY has generate new consistency transmitter with blade-system to meet high technical requirements in Pulp&Paper industries. Insurmountable advantages are over pressure protection (flowing mass lumps do not damage the measuring sensor) and blade / torque spring diaphragm connection technology keeps the sensor unit clean. With separate adjusting unit LYTH-CONS consistency transmitter is easy to calibrate. LYTH-INSTRUMENT OY PRESSURE/LEVEL AND CONSISTENCY MEASURING INSTRUMENTS SINCE 1948

2 CONSISTENCY TRANSMITTER LYTH-CONS Measuring system and construction: Measuring is based to force by flowing pulp. This force applies to blade which is connected to the sensor through torque spring diaphragm. Blade and diaphragm spring combination sends this move information to inductive differential sensor. Technical information: Consistancy range 1...7% Minimum measured range 1...2% Maximum measured range 1...7% Minimum measuring range 1% is available in whole range 1-7% Maximum process pressure Flowing speed max. 25 bar min. 0,5 m/s max. 4,0 m/s Lower and higher speeds are available, but impair the accuracy. Output signal Supply 4-20 ma (2-wire) VDC Materials: Sensor unit AISI 316 IP65 Adjusting unit Polykarbonate IP65 Adjusting: Connection: Span and zero adjusting in separate electronic box. In sensor unit there is no adjusting and calibration possibilities. Minimum process pipe DN 100. No upper limit. Process connection Sandvik NS 65 L-connection. LYTH-CONS transmitter is suitable also to Valmet-connector. For best measuring results valves and contractions are not recommendable near consistancy sensor unit.

3 LYTH-CONS -wiring: ADJUSTING AND DISPLAY UNIT SENSOR UNIT WIRING IN ADJUSTING UNIT

4 LYTH-CONS - ADJUSTING INSTRUCTIONS When sensor unit is connected to process adjust the requested measuring range from adjusting unit as follows: 1. Set the CS-jumper (Cource span) furthest right position (=smallest range). 2. Set S-potentiometer (=Span) to about 5,0 3. Set D-jumpers (=Damping) position 1 (=smallest damping). 4. Set CZ-jumper (=Cource zero) left side position (=smaller zero-adjusting) 5. Adjust Z-potentiometer (Zero) until the display (=output signal) is about 50% range * If output signal is too astatic, set D-jumpers to another position (2, -3 or 4 position) 6. Test the signal in practice by changing the pulp consistency with watervalve. If the signal does nt move enough, set higher reading in S-potentiometer (=span). If the signal moves too much, set lower reading in S-potentiometer (=span). If adjusting range in S-potentiometer is too small, set the CSjumper one step to left (=range expands).

5 We recommend to use printer in signal testing. 7. Adjust the measuring range with Z-potentiometer (= zero) 0-100% Control circuit in now calibrated. Final adjustings is better to do in longer time period together with laboratory tests. LYTH-CONS -adjusting summary: * Span-adjusting (S) to follow the pulp consistency alterations. * Damping (D) to keep the signal stable. * Zero (Z) adjusting to coincide the pulp consistency (Actually Zero (Z) adjusting is elevation how adjusted measuring range can be moved in total range 1-7%)