User manual 739 707
Contents
1. PHYSIK CHEMIE BIOLOGIE TECHNIK 10 14 W2010 Wei 1 Description This device helps study the operating principle of various analog sensors in connection with the nstrument cluster unit 739 6021 The device comes with sensors to monitor the coolant level the windshield washer fluid level the wear on the brake pads the brake fluid level as well as the tank con tent Safety notes 2 Scope of Supply Sensor panel 1 739 707 Set of holders 3 pieces LID LD DIDACTIC Instruction Manual 739 707 Sensor Panel 1 ND OOND OF W T30 positive connection Fuse for washing fluid sensor electronics 1 A Wear on the brake pads simulation Coolant level sensor Washer fluid level sensor Wear on the brake pads sensor Sensor for brake fluid level Tank content sensor Sensor resistance measurement sockets Ground connection 3 Technical Data Supply voltage U 12 V Coolant sensor type reed contact Washer fluid sensor type conductivity with evaluation unit Brake pad sensor type mechanical Brake fluid sensor type reed contact Tank sensor type potentiometric Tank sensor resistance R 340 Q Setup and Function Check Connect the device to the power supply at Terminal 30 1 and the ground 10 Link both 7 pin sockets 26 and 26 on the back with the nstrument cluster unit 739 6021 Plug two 4 mm safety bridging plugs into the sockets 3 to bypass the interrupted brake pad wea2. r sensors Place 100 ml beakers filled with water under sensors 4 5 and 7 For better handling you can swing the holders forward Position the lever for the tank sensor 8 on MAX LD DIDACTIC GMBH e Leyboldstrasse 1 D 50354 Huerth Germany Phone 49 0 2233 604 0 Fax 49 0 2233 604 222 E Mail info Id didactic de by LD Didactic GmbH Printed in the Federal Republic of Germany Technical alterations reserved Instruction Manual Page 2 2 Or place the spacers contact pieces as shown 3 Functional Description Coolant level 4 A magnet in a float monitors the coolant s level by triggering a reed contact With a normal coolant level the contact is closed if the coolant is too low it is open The sensor is at the top of the container and moves vertically A broken cable in the sensor s connector also leads to a warning Washer fluid level 5 Two electrodes which protrude at the bottom of the washer fluid s container monitor the windshield washer fluid s level Connected electronics evaluate the resistance between them If they are dry the value is infinite and the electronics open a relay contact The sensor s installation position is arbitrary A broken cable in the sensor s connector also leads to a warning Wear on the brake pads 6 A conductor loop incorporated in the pad monitors the thickness of the brake pads by breaking from friction when a minimum thickness is reached A broken cable in the
3. sensor s connector also leads to a warning Brake fluid level 7 A magnet in a float monitors the brake fluid s level by triggering a reed contact With a fluid level the contact is closed if the level is too low it is open The sensor is at the top of the container and moves vertically Tank content 8 A floating body monitors the tank content by moving a potentiometer To protect the equipment it has an upstream fixed resistor in the positive and negative wires A broken cable in the sensor s connector leads to a Low fuel warning Switch the equipment on The instrument cluster unit 739 6021 does not display any error message Remove a bridging plug from the sockets 3 for example This triggers a visual and acoustic warning message LD DIDACTIC GMBH Leyboldstrasse 1 D 50354 Huerth Germany Phone 49 0 2233 604 0 Fax 49 0 2233 604 222 e mail info ld didactic de by LD Didactic GmbH Printed in the Federal Republic of Germany Technical alterations reserved
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