Level controller TS-NW2 conductive
Construction
- Casing dimension 22,5 mm
- Two change-over contacts
- Connection ports for up to three immersion electrodes
- Resistance range 100 kW / 2 MW
Application
- Electroconductive liquids
- Filling and draining of tanks and reservoirs
- Monitoring of wells
- Dry-running protection
Mode of operation
These TS-NW2 devices are level relays used for monitoring the levels of conductive liquids. The exciting voltage must be applied to terminals A1 and A2 during operation of the devices. Single-terminal electrodes are used for recording measured values. The test circuit of the electronic control is electrically isolated from the power supply, the transformer used is manufactured according to VDE 0551. Electrode current 10 mA, electrode voltage 18 V AC. The delay on energization and the drop-out time are both 0,6 s.
1-point control
The reference electrode or conductive vessel wall is connected to terminal B1. The maximum electrode ist connected to terminal B2. If the maximum electrode is not moistened by the liquid, then the output relay is attracted instanteneously. If the maximum electrode is moistened by the liquid, then the output relay returns to its normal position. For this function, terminals B1-X2 must be bridged in the case of TS-NW2. Without the jumper the relay function ist reversed.
2-point control
The devices are connected as for the 1-point control with the addition of an electrode (minimum electrode) connected to terminal B3. If the maximumelectrode B2 ist not moistened by the liquid, then the output relay is attracted instantaneously. If the maximumelectrode is moistened by the liquid, then the output relay returns to its normal position. If the minimum electrode is no longer moistened by the liquid, then the output relay attracts again. For this function,terminals B1-X2 must be bridged in the case of TS-NW2. Without the jumper the relay function is reversed.