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Technical Documentation

THE COOL ONE

The calorimetric level sensor

FAFNIR GmbH • Bahrenfelder Str. 19 • D-22765 Hamburg • Phone: +49 (0)40-39 82 07-0 • Fax: +49 (0)40-3 90 63 39

08/2000
Issue: 1

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Summary of Contents for The Cool One

Page 1: ...Technical Documentation THE COOL ONE The calorimetric level sensor FAFNIR GmbH Bahrenfelder Str 19 D 22765 Hamburg Phone 49 0 40 39 82 07 0 Fax 49 0 40 3 90 63 39 08 2000 Issue 1 ...

Page 2: ...THE COOL ONE 2 Copyright Reproduction and translation only with the written consent of the company FAFNIR FAFNIR reserves the right to carry out product alterations without prior notice Art Nr 207042 ...

Page 3: ...THE COOL ONE 3 Tabel of Contents 1 Characteristic features of the level sensor THE COOL ONE 4 2 Safety instructions 5 3 Structure and mode of operation 7 4 Installation 9 5 Technical data 13 ...

Page 4: ...ating electronics unit of this level sensor is integrated in its probe tube which makes this sensor a more compact and space saving device when compared with other liquid monitoring systems equipped with an external evaluating unit The level sensor THE COOL ONE is extremely suitable for monitoring liquids the viscosity of which increases with rising temperatures and also for monitoring oil contain...

Page 5: ...l sensor Specialised knowledge must be obtained by undergoing regular training Operators installers and service personnel must observe all applicable safety regulations This also applies to the local safety regulations and accident prevention regulations not mentioned in this manual of operating instructions For the installation of the level sensor the response point must not be located in areas o...

Page 6: ... the design and inspection principles specified for overfilling safety devices In case of failure of the auxiliary power supply exceeding or dropping below the limit values or in case of interruption of the connecting lines between the system parts overfilling safety devices must report these malfunctions or indicate the maximum filling level The safety instructions in this instructions manual are...

Page 7: ... thermistor in liquid e g upon reaching the liquid level the PTC thermistor cools off and the resistance value drops The signal current is so limited that a re heating of the PTC thermistor in its submerged state is not possible In a gaseous environment the heating up time of the PTC thermistor ranges from 15 seconds at 80 C ambient temperature to two minutes at 25 C ambient temperature The evalua...

Page 8: ...n Type 3 is intended for installation laterally and below a liquid level This level sensor has a fixed screw in piece thread 3 8 and the response length cannot be varied see Fig 1 Fig 1 THE COOL ONE types 1 3 structure 10 response length probe length M12 plug wrench size 27 response point thread 3 4 Type 1 probe length impressed probe length impressed 122 34 M12 plug wrench size 22 Ø16 response po...

Page 9: ...iquid nor excessive gas flow can result in premature response of the level sensor The level sensor should be installed as perpendicularly as possible so that any residual liquid can drop down from the detector With the permissible filling degree in the container you define the response height A of the level sensor types 1 and 2 see Fig 2 The response length of the level sensor type 3 is not va ria...

Page 10: ...ustment of the response length L can be checked without removing the sensor by means of the reference dimension Y distance between the top end of the pro be tube and hexagon support of the screw in body and the impressed probe length L Z Y In order to lock the probe tube in place proceed as follows Tighten the gland bolt of the screw in body firmly and lock it by tightening down the locking screw ...

Page 11: ...io nal Fig 3a Terminal connection diagram example 3 4 R1 4 7 Ω R2 4 7 Ω 1 5 k 1 5 k 1 brown 5 green yellow T1 T2 black white 2 LED1 green LED2 yellow LED3 yellow 1 5 k blew PIN 2 LED 2 yellow illuminated in submerged state PIN 4 LED 3 yellow illuminated in emerged state Output max 80 mA T PTC measurement evaluation unit THE COOL ONE ...

Page 12: ...r operation In addition the electrical power supply of the downstream devices must also checked Fig 3b Terminal connection diagram example 3 4 R1 4 7 Ω R2 4 7 Ω 1 brown 5 green yellow T1 T2 black white 2 relay 1 D1 D2 relay 2 blue PIN 2 relay 1 pulled up in submerged state PIN 4 relay 2 pulled up in emerged state Output max 80 mA T PTC measurement evaluation unit THE COOL ONE ...

Page 13: ...alvanised DIN 17222 soldering tin L Sn 40 Pb Viton FPM linear polyester Ultradur Type 2 stainless steel 1 4301 to 1 4571 DIN 17440 Viton FPM Type 3 stainless steel 1 4301 to 1 4571 DIN 17440 Submergence switching delay 2 seconds Heating up release time Ambient temperature at 25 C 2 min at 80 C 15 sec Housing protective system IP 67 Outputs 2 x PNP open collector max 80 mA Dimensions tube diameter ...

Page 14: ...THE COOL ONE 14 ...

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