Gold Plated Contacts (-213) .............. 13 SCH-EX- (EEx-d-Version) ..............13 Technical Information .................. 14 Technical Information SCH-Ex units ..........14 Order Codes ....................14 EU Declaration of Conformance ..............15 ...
Operating Instructions 4. Regulation Use Any use of the “SCH”, which exceeds the manufacturers specification may invali- date its warranty. Therefore, any resulting damage is not the responsibility of the manufacturer. The user assumes all risk for such usage.
Observe the Accident Prevention Regulations. Never use the pressure switches as a climbing aid. KOBOLD Messring GmbH accepts no liability for non-compliance. page 4 SCH K03/0320...
Use flat gasket ring screw. for higher pressure. Connection The differential Pressure Switches SCH- DDCM have 2x G 1/4 internal thread connections. Connect the high and the low pressure according to the marks. = high pressure = low pressure When connecting attention should be paid to the marks.
3-2 opens, 3-1 closes Attention! The Pressure Switches are precision instruments, set and adjusted at the factory. Do not open the device or re-set the varnished adjustment screw. This would alter the switching points and resetting would be necessary. page 6 SCH K03/0320...
Turning the setting spindle clockwise gives a lower switching point, turning anticlockwise gives a higher switching point. The scale should be used as a guide, for more exact settings you should use a manometer. SCH K03/0320 page 7...
When the switching difference is changed, the lower switch-off point remains unchanged, the upper switching point is shifted by the switching difference. xd= switching difference (hysteresis) SP= switching point RSP= switch back point page 8 SCH K03/0320...
Changes to the setting spindle, to the setting of switching pressure, do not lead to changes in the switching intervals as the switching points are adjusted corre- spondingly. The switching differential of the individual microswitches corresponds to the switching differences listed under basic equipment. SCH K03/0320 page 9...
Page 10
Setting wheel II CCW-raise switching point at microswitch II Setting wheels I and II have an internal stop to ensure that the microswitches cannot be adjusted past their effective range. Attention: Note the sticker besides the plug connection of Pressure Switch. page 10 SCH K03/0320...
Switching capacity: min. 4 mA, 5 V ; max. 100 mA, 24 V At higher voltages and currents the gold layer on the contacts will be damaged. SCH-EX- (EEx-d-Version) Pressure switches in Ex version can be delivered only in a design tested by the IBExU.
(e.g. syphon). Max. ambient temperature: -25...+70 °C (-25...+60 °C for SCH-DGM) At ambient temperatures below 0°C ensure that no water condensation can arise in the sensor and in the switching device.
11. EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Pressure Switch Model: SCH-... to which this declaration relates is in conformity with the standards noted below: EN 60335-1 (IEC 60335-1) Safety of household and similar Electrical appliances.
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