e OmROoN 111-994. Conductive Level Controller 61F-GP-N2 Automatic Water Supply and Drainage Control Ideal for level control of any conductive liquid. = Compact plug-in controller for single- or two-point contro! of conductive liquid level. @ 24/110/120/220/230/240 VAC operation possible. Easy installation on DIN rail. @ Low voltage (AC) electrodes. Full surge protection. Ordering Information | Compact plug-in conductive level controller | 61F-GP-N2_ | When placing your order, be sure to specify the desired operating voltage. Example: 61F-GP-N2 120 VAC ~ To Rated supply voltage = Accessories (Order Separately) Selection Guide for Electrode Holders and Separators Electrode Holders Applications For city water and When mounting space _[{ For low specific liquids. Used for When resistance to other general-use is limited. Special 3-pole | sewage, sea water, etc , having a low high pressure is electrodes. holder of small size and | specific resistance. in sewage use, required. Ideal for use Easy-to-replace light weight. Ideal for electrode holders must be installed 10 | in tanks where separate versions soft drink vendors, etc., | to 20 cm apart from one another. For temperature or facilitate where only limited acids, alkalis and sea water, electrode | pressure inside the maintainence of space is available. holders may be as much as 1 meter tank is high, e.g electrodes. apart to operate properly. 250C Mounting style Flange Screw Flange Screw Insulator material | Phenol resin Phenol resin Ceramics Teflon Max. temperature 70C (without water 150C (without water drips or vapour | 250C (without water drips or vapour on the on the surface of the electrode holder) | drips or vapour on the surface of the electrode surface of the holder) electrode holder) No. of 1 j BF-1 BS-1 electrodes 3 | PS-3S PS-31 Electrode Separators No. of electrodes Model 1 FO3-14-1P 3 FO3-14-3P Socket 8 PIN PFO83A-3 | Note: Shaded areas represent stocked lines Please contact Omron for availability of other items61F-GP-N2 omron 61F-GP-N2 Connections Automatic Water Supply and Drainage Control 1. Water supply 2. Drainage Connect electromagnetic switch coil terminal A to Tb. The pump stops when the water level reaches E1 and starts when the water level drops below E2. Power source RST 220 or 240 VAC MCCB Electromagnetic , switch t _ M)- - - -(P Reservoir e Connect the electromagnetic switch coil terminal A to Ta. e The pump starts when the water level reaches Ei and stops when the water level drops below E2. Note: 1. The diagram shows the connections for water supply. When draining, change the connection Tb to Ta. 2. The earth terminal must be grounded. Te S2 nO S1 Tb E E3 Earth Tank Operation The conductive type level controller consists of a plug-in controller connected to a set of stainless steel probes. These are cut to length and inserted vertically into the liquid. A low voltage is applied between these probes and the earth probe (or tank, if it is electrically conductive). The water pro- vides a current between the earth probe and the high-level probe. The output relay in the controller is energized when the water level reaches the high-level probe and de-ener- gized when the water level falls below it. For two-point control a low-level probe is used as well. in this case the relay does not de-energize until the water level falls below the low-level probe. Using the low-level probe allows awide differential between switching a pump on and off, and can avoid excessive pump operation during tank emptying or filling. If this differential is not required, the low-level probe need not be connected. Dimensions Note: All units are in millimeters unless otherwise indicated 61F- GP-N2 = 434 f+ L384 70 ; o ie PFO83A61F-GP-N2 omRON 61F-GP-N2 Precautions = How to Mount Electrodes Connecting Electrodes to Electrode Holders Electrode holder Clamp screw 3 Tighten the electrode with Connecting nut the two clamp screws 1 Spin a lock nut and a spring washer onto the electrode Spring washer | | 4 Secure the connecting , od nut by tightening the lock ro J nut and spring washer Lock nut 2 Fully fit the electrode into the EI d connecting nut attached to the ectrode electrode holder # Application When using electrodes in sea water or sewage, provide a sufficient interval (normally 1m) between the electrodes. If the sufficient inter- val cannot be provided, employ a low-sensitivity type Floatiess Lev- el Controller When taping one of the electrodes to prevent it from contacting the other electrodes in water, do not tape the electrode entirely butieave at least 100 mm of its end uncovered. When the required length of the electrode ts more than 1 m, use a separator at each joint of two electrodes so as to prevent the elec- trodes from contacting one another. (NOTE: Avoid use of the sepa- rators in dust-containing liquids.) Usually, electrodes are used in a set of three: long, medium, and short. Connect the short electrode to E1, the medium electrode to E2, and the long electrode to E3 Make E3 at least 50 mm longer than E2 1 E2 Min E3 50mm tm im Electrodes are in actual contact with the iiquid. Standard electrodes are made of stainless steel and usabie in purified water, sea water, Connecting One Electrode to Another Electrode Lock nut Spring washer Connecting nut 2 Fully fit the elec trode into the con- necting nut at- tached to the elec- trode holder 3 Tighten the electrode with the two clamp screws 4 Secure the connecting nut by tightening the lock nut and spring washer 1 Spin a lock nut and a spring washer onto the electrode sewage, acid (except acetic acid, sulfuric acid, etc ) and alkaline liq- uids, although they may corrode depending upon the temperature and working conditions Note that the Conductive Level Controller 61F-GP-N2 1s capable of controlling liquids with specific resistances of up to 30 kQ-cm when the controller employs a type PS-3S electrode holder with the elec- trode(s) submerged to a depth of 30 mm max Kind of water Specific Applicable type resistance City water 5 to 10 kQ-cm General-purpose type Well water 2 to 5 kQ-cm General-purpose type Industrial water | 5 to 15 kQ-cm General-purpose type Rainwater 15 to 25 kQ-cm General-purpose type Sea water 0.03 k2-cem Low-sensitrvity type Sewage 05 to2kQ-cm Low-sensitivity type Distilled water | 100 kQ-cm or less | High-sensitwity type Over 100 kQ-cm Consult OMRON