Automatic control regulation liquid levels. sensitivity ranges. Fillin

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Automatic control regulation liquid levels. sensitivity ranges. Fillin

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Level control relay with alarm
Automatic control regulation liquid levels. sensitivity ranges. Filling emptying function selected switch. High alarm selected switch. Memory selected. LEDs indicate state power supply, output relay alarm relay.
Type Part numbers (and voltages)
Connection Filling control with high alarm
Power supply characteristics
Supply voltage
Min. Max.
Supply tolerance Power nominal maximum Immunity from micro power cuts Delay pick-up Response time power-up Insulation coordination
Max.
230, 120, 50/60 galvanic isolation transformer 0.85 1.15 except 0.85 approx. Category III, degree pollution conforming 664.1 VDE0110 KV/2
Control circuit technical characteristics
Sensitivity range Display accuracy with maximum sensitivity AgCdO changeover 2000 operations 2000 operations 6000 operations 6000 operations Self-extinguishing with ferrule without ferrule (conforming 68.1.14) (conforming 68.1.1/2) without condensation approximately
terminals Supply voltage Output relay (R1) Alarm output relay (R2) Probe inputs Note example, tank conductive (metal), used reference electrode (C). green indicates power supply. yellow indicates state output relay. indicates state alarm relay.
Electrode voltage Electrode current Response time
immersion emersion
Output circuit characteristics
Output Breaking capacity Maximum breaking current Minimum breaking current Maximum breaking voltage Mechanical life Electrical life AC12 AC15 DC13
Dimensions
General characteristics
Casing material Terminal capacity
Temperature limits Relative humidity
78,5 89,7 99,3
Stored
Weight
Note probe cable does have screened, avoid mounting close power supply cables. conform directive (89/336/EEC), screened cable must used, with screening connected common earth.
order, specify
Standard products
Standard products, stocked
Part number
Example Level control relay with alarm
3/10
Operating principle
Control level conductive liquid specific points (high levels) with alarm level which abnormally high low. principle based measurement apparent resistance liquid between submerged probes. When this value lower than preset threshold unit front face, output relay and/or alarm relay change state. avoid electrolytic phenomena, current runs across probes. Adjusting sensitivity sensitivity that relay will change state when probes contact with liquid. Then check that relay returns initial position soon probes emerge. certain applications, fine-tuning sensitivity prevents inappropriate detection, such presence foam bubbles surface occurrence leakage impedance between probes (extended line capacity, humidity, etc). Note Latching alarm relay de-energised state fault occurs programmed switch underside unit (only when unit switched off). reset alarm relay power, long levels reset. Programming level controller programmed using switches lower panel
Memory Alarm Function Emptying High Filling
Note Memory, Alarm Function must only selected when unit switched off.
Filling control with alarm power-up, probe submerged, relays energised pump filling starts, relay lit. When level reaches probe, relay de-energises pump filling stops, relay goes off. Relay re-energises when probe emerges. event fault (level continues fall) probe emerges, relay de-energises alarm triggered relay lit. This fault stored.
Emptying control with alarm power-up, probes Min, submerged, relays energised pump emptying starts, relay lit. When probe emerges, relay de-energises pump emptying stops, relay goes off. event fault, level continues fall probe emerges, relay deenergises alarm triggered relay lit. This fault stored.
Memory
Memory
Memory
Memory
Filling control with high alarm power-up, level tank low, relays energised pump filling starts, relay lit. When level reaches probe, relay de-energises pump filling stops, relay goes off. event fault, level continues rise reaches probe AI., relay de-energises alarm triggered relay lit. This fault stored.
Emptying control with high alarm power-up, probes Min, submerged probe above level liquid. Relays energised pump emptying starts, relay lit. When probe emerges, relay de-energises pump emptying stops, relay goes off. event fault, level continues rise reaches probe AI., relay de-energises alarm triggered relay lit. This fault stored.
Memory
Memory
Memory
Memory
Note Delay pick-up Response time immersion
Response time emersion Response time power-down
3/11

Automatic control regulation liquid levels. sensitivity ranges. Fillin

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