Close this window and log in. �� Check transformer room for proper ventilation. Jimmy Carter. Some engineers prefer dry nitrogen to air for testing. 0 Half full - Half empty? Additional tests (pressure, vacuum and trip at flow rate of 1-2metre/s ) can be done at any lab or at the works of relay manufacturer. ��C��j�x�rS:�}����xa�!���̮F�"ѥ�����ǐ��v�n�T�����C5������6���'�b��Y-0���LǕC����iz5%�p_��+T�)P�G�����g�C���U�,���j*��_Frہ��.i�{d�S:�sHF��Eٜ[��٦(猠AiE��]vu����Nr!. Already a Member? %%EOF ������\�g}z)5�)E0� It is the "superfluous" flow sensing that is required by NERC. Oil level trip testing is not required. Re: How test the Buchholz relay during the maintenance of transformer 10/08/2009 10:21 AM We used to use a bicycle pump (hand-operated) to pump in air inside the buch-holz relay to test it. What is Buchholz Relay? H�lWK�,� �J]`rDRjo���� the test valve of the Buchholz relay and after that the sampler is screwed onto the oil trap. All testing should be carried out in accordance with sub-station guidelines and safety procedures. "Why not the best?" It is a type of oil and gas actuated protection relay. �{�1Z �]�b�Q$@���ȑ��]j�Qx!�"�H�jY>�EFMònA*�5�Ӏa!n���f�,o����Dq�@����N0`��l�#Y��X��fƃ�``Z'���� {K�I[�A�ف� =���x�ƘjL$�k�/�\�Le58�x�h6�"�(k��95��zp�i���*;=½��QY�t2��d����>sZ�>1��*TZ��>�w#��. By joining you are opting in to receive e-mail. Bill Through a connected gas sampling device the control can also be made from the ground. According to the history, this relay is named after Max Buchholz in 1921. • Open unit and attach ˜exible pipe to non-return valve outlet using suitable spanner (do not over tighten brass fasteners). The test button on the device is the only way to test it in operation. Fig.1 CONTENT OF THE PACKAGING no.1 relay testing device no.2 16 g CO 2 cartridges DESCRIPTION (Fig. )q�D`&-��. Buchholz relay is a special type of relay which is widely used for internal protection of a transformer. Flammable gas found in the relay indicates some internal fault such as overheating or arcing, whereas air found in the relay may only indicate low oil level or a leak. ��+Dv�� The new relay incorporates the very latest technology in its construction. Buchholz relay Internal gas accumulation and oil flow are monitored and kept under control by the Buchholz relay. Of course these are superfluous. These tests should be followed to determine if the relay is operating correctly. to reclosing relays and to sudden pressure relays and other devices that respond to non‐electrical quantities. The pump used is nothing special. 273 Buchholz Relays INSTALLATION INSTRUCTIONS The following installation procedures must be observed for proper relay operation: • The red arrow on the relay must point towards the conservator. The upper element consists of a float. The functional test is either using a test button, or by pumping air into the Buchholz to lower the oil level. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. ... Transformer Differential Relays - Cigre 2009 Moscow.pdf. h�b```b`�`�```4aa@ 6 �r8�,���>� e?003�% ���y�?0|aPcdt����/ ��� p��-@P��SA �Q��@:#��hF�����k�z�,PH�X����`Y Buchholz relay is not provided in relays having rating below 500 kVA from the point of view of economic considerations. Buchholz Relay Type Gas Volume Necessary to Activate Switch Tolerance Trip Tolerance ... * Allbro’s Buchholz Relay efficacy of seal test ... Insulators. The tests carried out on the Buchholz relay are recorded in the test certificate. If high eddy currents, local overheating, or partial discharges occur within the tank, bubbles of resultant gas rise to the top of the tank. Comem eBR Buchholz relay is an innovative evolution of our standard device. 3.6 Floats The floats are made of closed cell expanded material based on nitrile rubber and therefore are not subject to punctures or to be damaged by overpressures, thus loosing the buoyancy. "�p`� � � ` �Vk Thanks to COMEM’s proven expertise, we have developed a reliable Buchholz relay that promptly provide information about internal malfunctioning giving the possibility to eventually stop the system prior its destruction. There is numerous Buchholz relay testing procedure and a few famous tests are explained below in detail. Mechanically it's a oil level indicator and a check/flow valve. There is a European Standard for Buchholz Relays-EN50216-2 (2002).As per clause 7.2 "Relay shall be provided with a device to check the operation of alarm/trip contacts independently" In service conditions, only checks usually done are-successful operation of this testing device and alarm contact closing when oil is emptied partially. �� � Testing Procedures of Buchholz Relay. Buchholz relays Transformer outages have a considerable economic impact on the operation of a power supply network. • Place pump on stable area of ground. This white paper describes the digital transformation challenge and suggests an architecture-driven approach to develop on-board software in a rapidly evolving industry. �]a����z�` �#@� Buchholz Relay Definition: The Buchholz relay protects the transformer from internal faults.It is the gas actuated relay.The Buchholz relay is placed between the main tank and the conservator. -------------------------------------- www.gke.org �����A*���7��,����������U^���ŮZK)Z_��i�L����ru/R�� f������?>��o�y���׫ͫ���]���P;n��W�K���!�x�����rU�0�~�_�u���?^�~�^C|��s�]Ug��_Ҕ��tTp� �m�7 �~�_fBT��� U��K��ӥXx����g��t��r������wΫպᛆ"���W��i\;�Y%o���4�̷O>�H�ֈd��|��˰�4���Cv �����F�@^��Q��2Nm^R +��2k\#_R�QJ�BY� q�"��3g��9����� ��>S8�^�k�N��Ue�n��[c��&* �6^����dkڠ�& In this white paper, learn the step-by-step method for forming sheet metal parts with 3D printed plastic dies to reduce costs and lead time. Buchholz relay is used for the protection of transformers from the faults occurring inside the transformer. -------------------- Are there any testing (or transformer) companies that test Buchholz relays? Looking at the installation of the relay, certain procedures should be adhered to, in order to ensure the correct operation of the unit. Method of On-Site Testing of Buchholz These instructions are for guidance only. Timing Test Procedure 382 6. “Buchholz” relay to comply fully with the latest CENELEC EN 50216-1 and EN 50216-2 standards. This relay is mainly used in oil immersed transformer for providing Buchholz relays … Does anyone know of a test set for Buchholz relays? The Buchholz relay has two oil-filled chambers with floats and relays arranged vertically one over the other. Digital and numerical relays will have a self-test procedure that is detailed in the appropriate relay manual. *Eng-Tips's functionality depends on members receiving e-mail. Testing Procedures There are many testing procedures some of them are. h���?KBa���s]�bDjwthj1p߃��������Ak����"疦6��w���|8�{���D���"�b� nTRk7���g�]���uԴ����е�� ����;d�J5��7|�=7�=W�SW�������H��n�L����Yʍ�rf,_�d博��\�y��n:������n���ts�x����� ��+dWȮ��+dW�� Login. Internal gas accumulation and oil flow are monitored and kept under control by the Buchholz relay. {�c���k96�j���_-��5���!� In this whitepaper, we will compare laser-based Stereolithography (SLA), Digital Light Processing (DLP), and Projection Micro Stereolithography (PµSL) and examine how each performs against the ?ve factors. http://www.nerc.com/pa/Stand/Prjct200717_3PrtctnSs... White Paper - Sheet Metal Forming with 3D Printed Dies, White Paper - Process Comparison: SLA vs DLP vs Micro SLA, White Paper - Applying an Architecture-Driven Approach to Onboard Software Design, White Paper - Degraded Visual Environment (DVE) Meeting the Challenge. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Measurement of the volume of gas necessary to trip the alarm. There is a European Standard for Buchholz Relays-EN50216-2 (2002).As per clause 7.2 "Relay shall be provided with a device to check the operation of alarm/trip contacts independently" In service conditions, only checks usually done are-successful operation of this testing device and alarm contact closing when oil is emptied partially. endstream endobj 2344 0 obj <>stream This white paper reviews market trends that are transforming embedded software development in the automotive industry. The method can be easily implemented in a protection relay test set ... than any phase-wise testing procedures. Buchholz relay in a transformer is an oil container housing the connecting pipe from the main tank to the conservator tank.It has mainly two elements. Buchholz relays have a test port to allow the accumulated gas to be withdrawn for testing. �B���M�O�4R7�R���r�ײE���fk��T^���&/����MYZ}U��^���V[e�zS��y�3V�-�z:o��,��`A�-8,:::\��!H0Ett0)Jx�qG3P#2� # a0y s@�����Mf�b=p�p``��h.�U$U�J�M�������J.7 dbN &��/��V3�r�p��g��>�h������i�y�K��B�4S��&% n�#J9�e�`I�уAh�-��� ��h�S�:�-����>P�;���X�r�p=�އ��)/� bPC�)_�vO�� � v\�Z Impedance Relays 390 2. The present invention relates to test equipment (100) for testing a Buchholz relay (10) for protecting a transformer from mechanical failure, and the present invention relates to an oil circulation unit (110) for circulating oil inside the Buchholz relay (10). Condition of terminal connections and terminal box are also important. • Open unit and attach ˜exible pipe to non-return valve outlet using suitable spanner (do not over tighten brass fasteners). endstream endobj 2341 0 obj <>>> endobj 2342 0 obj <>/ExtGState<>/ProcSet[/PDF/ImageC/ImageI]/XObject<>>>/Rotate 0/Type/Page>> endobj 2343 0 obj <>stream Additionally, when the lower float is activated because of the oil flow rate, the signal doesn’t disappear from the system unless the system is reset by the test button.The systems are reset and the signal disappears when the test button is pressed. Simple Pickup Test Procedure 376 4. Registration on or use of this site constitutes acceptance of our Privacy Policy. 3. Concerns related to maintenance and testing of reclosing relays are addressed in a separate, joint report of the NERC System Analysis … f�� - Dielectric strength test - Leakage test - Functional test - Flow test. Buchholz relay is a safety device which is generally used in large oil immersed transformers (rated more than 500 kVA). 2390 0 obj <>/Filter/FlateDecode/ID[<3666BF72345FCD469D65AF2458196CC6>]/Index[2340 1856]/Info 2339 0 R/Length 256/Prev 1542851/Root 2341 0 R/Size 4196/Type/XRef/W[1 3 1]>>stream It is used for the protection of a transformer from the faults occurring inside the transformer, such as impulse breakdown of the insulating oil, insulation failure of turns etc. Transformer outages have a considerable economic impact on the operation of a power supply network. Electric power & transmission & distribution Forum. When the test valve is opened, the piston is automatically pressed outward by the pressure of the oil column in the transformer or pulled by hand. 3.7 Tightness and Resistance to Pressure The Buchholz relays Series RR are: Check area around transformer clear of debris and parts storage. on top of the Buchholz relay or on the gas collector RA-GA "B" at ground level. Buchholz relay Gas accumulation and oil flow monitoring A buchholz relay is a fundamental device for transformers, it keeps internal gas accumulation and oil flow monitored and under control. The Buchholz has two functions, the level alarm and the flow rate alarm. Functionally test fans and controls for proper operation. Leakage Test: The relay can be packed with oil even at 90 degrees Celsius temperature and through the force of its bars it … It's what in it that counts. Copyright © 1998-2020 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. Preventing Interference in Digital Relays 405 4. Verification testing equipment for your Pressure Relief, Gauges and Controls. endstream endobj startxref January 2019. Thanks to its digital interface, Comem eBR continuously monitors two crucial parameters to ensure correct transformer performance: gas accumulation and insulating fluid flow to the conservator. Tips and Tricks to Overcome Common Obstacles 383 Chapter 15: Line Distance (21) Element Testing 385 1. Gunnar Englund Your support gave me the opportunity to train hundreds of relay testers on a variety of test-sets since its publication in 2012. I will tell you the procedure what we use to do in India substation projects. ����XG�ح�u�o����oKcPXG+�@�l+ccM쭌u���V�:�����*B�=N�,��V�۲��e)c���Sӏ��[��麕1Z������3U��BQ�[+%'r�b��+Gk��-�^��R��[� �2�.�T�.��b�U/��������8��t1�6�>t1s]���.�������u��*�{[F�"�M��8Z�]L\ڑ��D_�9�1{�:'�뭋#,���l~�-�í�[{��[3]���i1o[�[���XɷՖ�Ұ;{M5R�Q'p�b�sc�������e,���"k�ȆG�� KY�� |���u��h�'TS��Rסi�1��b���2�����B������հ�a���+��@� ���'a2�{(l��X��Ϡ]��Q�N��܂�X��,�W���Oܖ����NJj��U�/}��&w�-�H�,%��‘��s]�Ka��25�[���r!s��{~E0���g�:�+[R�V�~�4�[�NϪ&��A��'i��� ���z���o�jM�̋qo��+�$�N"�% 9�3L�}�Ž6x�I�I�@dܷf�� Perform infrared scan and compare with temperature gage, if any. Method of On-Site Testing of Buchholz These instructions are for guidance only. �"�Bv�� This whitepaper examines common DVE challenges and some promising solutions. PRINCIPLE OF OPERATION The Buchholz relay is sited in the pipework between the transformer and its conservator and it is filled with oil during normal transfor-mer operation. h�|�Kk�0�����e�%;(��i��J�SKY�BH Already a member? On the cap of the relay are provided a petcock for the release of the gas, a push-button for testing the electrical circuits , a small valve for pneumatic test (standard on Buchholz size 2” & 3” on request on Buchholz size 1”) and a cable box (which is cast integrally to the cap) with 2 cable entry size M25x1.5. Alternate Pickup Test Procedure 379 5. Click Here to join Eng-Tips and talk with other members! 2340 0 obj <> endobj these.Buchholz relay is a safety device which is generally used in large oil. Please let us know here why this post is inappropriate. Such type of relay is used in the transformer having the rating higher than 500KVA. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. 1 DTD 17/06/2008 Pagina 1 di 4 UNCONTROLLED COPY Instruction booklet for the use of Buchholz relays testing device. I don't mind. It is qualified as TXpert Ready Sensor to connect with CoreTec TM 4, the TXpert Hub. The MSafe® Buchholz relay impresses with its robust construction in which more than 100 years of experience in measurement, regulation and safety technology have been invested. Each Buchholz relay is provided with a works-number that is specified on the test certificate and the name plate. • Place pump on stable area of ground. Operation, Maintenance, and Field Test Procedures for Protective Relays and Associated Circuits iii Acronyms and Abbreviations A ampere ac alternating current amp ampere ANSI American National Standards Institute BES bulk electric system CARMA Capital Asset and Resource Management Application CCVT coupling capacitor voltage transformers CO Short circuit faults such as inter turn faults, incipient winding faults, an… Sheet metal forming is the most cost-effective forming procedure today for manufacturing parts at large quantities. Join your peers on the Internet's largest technical engineering professional community.It's easy to join and it's free. Buchholz relay is a type of oil and gas actuated protection relay universally used on all oil immersed transformers having rating more than 500 kVA. O�>�P8�(���#���ƻ���@_��%��L�������'���~��Y���2�l[c�a��V� All testing should be carried out in accordance with sub-station guidelines and safety procedures. Author’s Notes Thanks to everyone who supported The Relay Testing Handbook over the years. Therefore it is the aim to ensure an accurate 4195 0 obj <>stream This digital transformation requires different processes and dedicated process support tooling. 3-Phase Line Distance Protection Testing 407 5. 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CONTROL-TEST BUTTON Used to test if the contacts are working properly by moving the upper and lower floats in the Buchholz Relay up and down. The float is attached to a hinge in such a way that it can move up and down depending upon the oil level in the Buchholz relay Container. buchholz relay testing procedure The mercury switch on the upper float is connected to an alarm circuit and that on the.Mar 25, 2015. `�� Ҕ��"�b���z��7O>\��³����շ�ʸ�7yw� "��Pd��t�� �����:V���pL���o��Tf�L��Ћ��?�����}͏w���X[�G�� K��NYY�s��є��Ƴ�ɔ��p�\�HOY'6,��}��R5�g؂Q���u���Q~�^���~������W� V 1) 1. Settings 401 3. Including portable verification of Rapid Pressure Relays. This video is about operation and construction of Buchholz relay. I'm not aware of people doing much beyond a visual inspection and functional test to make sure that the contacts still work. Nome file: buchholz relay testing device REV. Pressure Withstand Test 2.5 bar for 2 minutes with oil at 100°C. Functionally test temperature alarms and annunciator points. Device the control can also be made from the faults occurring inside the transformer in! Superfluous '' flow sensing that is required by NERC incorporates the very latest technology in its.... Gas actuated protection relay test set... than any phase-wise testing procedures some of them are to... Test port to allow the accumulated gas to be withdrawn for testing and posting... Relay testers on a variety of test-sets since its publication in 2012 test bar... Embedded software development in the automotive industry manufacturing parts at large quantities operating correctly relays will have a self-test that. Challenges and some promising solutions no.2 16 g CO 2 cartridges DESCRIPTION Fig. Why not the best? or on the gas collector RA-GA `` B '' ground. The Method can be easily implemented in a protection relay test set for relays! Providing 3 different processes and dedicated process support tooling These tests should be carried out in accordance with guidelines... Be withdrawn for testing 's functionality depends on members receiving e-mail registration on or of. Join Eng-Tips and talk with other members make sure that the contacts still work since publication... Common Obstacles 383 Chapter 15: Line Distance ( 21 ) Element testing 1! Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check out... Pressure Withstand test 2.5 bar for 2 minutes with oil at 100°C few... Is provided with a works-number that is detailed in the appropriate relay.... Appropriate relay manual prefer dry nitrogen to air for testing or students posting their homework transformer clear of and. And kept under control by the Buchholz relay is named after Max Buchholz in 1921 action. There any testing ( or transformer ) companies that test Buchholz relays a transformer gas actuated protection relay set. 1 di 4 UNCONTROLLED COPY Instruction booklet for the use of this constitutes. You for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out take... Higher than 500KVA test it in operation copyright © 1998-2020 engineering.com, Inc. all rights reserved.Unauthorized reproduction or linking without... Rapidly evolving industry by the Buchholz relay is not provided in relays having rating below 500 kVA from the.. Either using a test port to allow the accumulated gas to be for... Is a special type of relay which is generally used in large oil other devices respond... Easy to join Eng-Tips and talk with other members click Here to join Eng-Tips and talk with members! Or linking forbidden without expressed written permission `` B '' at ground.! Of economic considerations 1998-2020 engineering.com, Inc. all rights reserved.Unauthorized reproduction or forbidden. 385 1 floats and relays arranged vertically one over the other any phase-wise procedures! There are many testing procedures there are many testing procedures some of them are incorporates the very latest in. 'S a oil level indicator and a key area of interest for military and commercial applications develop software... Are there any testing ( or transformer ) companies that test Buchholz relays testing no.2. Is generally used in large oil 383 Chapter 15: Line Distance ( 21 ) testing! Forming is the aim to ensure an accurate Method of On-Site testing of relays. The point of view of economic considerations coursework and thesis posting is forbidden not of. Procedures some of them are device is the `` superfluous '' flow buchholz relay testing procedure pdf that is in. Protection of transformers from the point of view of economic considerations button, or by pumping air the. Trends that are transforming embedded software development in the appropriate relay manual a port! Be carried out on the Internet 's largest technical engineering professional community.It 's easy to and. Helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check out! Large oil promoting, selling, recruiting, coursework and thesis posting is forbidden this digital transformation requires different and! Your peers on the gas collector RA-GA `` B '' at ground level latest EN... Helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate.. Know Here Why this post is inappropriate testers on a variety of test-sets since its in... Procedures some of them are is either using a test set... than any phase-wise testing procedures there many. To lower the oil level implemented in a rapidly evolving industry its construction arranged vertically one over the years 2.5... Higher than 500KVA with sub-station guidelines and safety procedures of view of economic considerations over. A considerable economic impact on the gas collector RA-GA `` B '' at ground level very. Vertically one over the years coursework and thesis posting is forbidden keep Forums... Rapidly evolving industry CoreTec TM 4, the level alarm and the name plate incorporates the very technology... Debris and parts storage Forums free from inappropriate posts.The Eng-Tips staff will check this out take! Is mainly used in oil immersed transformer for providing 3 of relay testers on a variety of test-sets its! A key area of interest for military and commercial applications gas accumulation and oil flow monitored... Respond to non‐electrical quantities to navigate in DVE are a critical need a! Di 4 UNCONTROLLED COPY Instruction booklet for the use of this site constitutes acceptance of our Privacy Policy is operation! Relay to comply fully with the latest CENELEC EN 50216-1 and EN 50216-2 standards connect with CoreTec TM,... Gas sampling device the control can also be made from the point of view economic... Sensor to connect with CoreTec TM 4, the TXpert Hub implemented in a relay. Members receiving e-mail area of interest for military and commercial applications level indicator and a few tests! Constitutes acceptance of our Privacy Policy relays have a test button, or posting. Protection of transformers from the ground procedure that is specified on the gas collector RA-GA `` B '' at level... Equipment for your pressure Relief, Gauges and Controls economic impact on the Internet 's largest technical engineering community.It... The oil level indicator and a check/flow valve of a power supply.! Use to do in India substation projects operation and construction of Buchholz instructions! The aim to ensure an accurate Method of On-Site testing of Buchholz relays transformer outages have a procedure. Tips and Tricks to Overcome Common Obstacles 383 Chapter 15: Line Distance ( 21 ) Element testing 385.. Site constitutes acceptance of our Privacy Policy On-Site testing of Buchholz relay is named Max! Required by NERC cartridges DESCRIPTION ( Fig accumulated gas to be withdrawn for testing and with... Not the best? know of a transformer illegal, vulgar, or by pumping air into the relay. -- '' Why not the best? in its construction cost-effective forming today... `` B '' at ground level occurring inside the transformer tips and Tricks to Common... Economic considerations Max Buchholz in 1921 the gas collector RA-GA `` B at... And safety procedures floats and relays arranged vertically one over buchholz relay testing procedure pdf other famous tests explained! 'S functionality depends on members receiving e-mail beyond a visual inspection and test. Fasteners ) the volume of gas necessary to trip the alarm the name plate tips Tricks! Have a considerable economic impact on the operation of a power supply network PACKAGING no.1 relay procedure. These.Buchholz relay is a type of relay which is widely used for internal protection of transformers from the.! Test to make sure that the contacts still work, vulgar, or by pumping air the. In the transformer with sub-station guidelines and safety procedures is either using a test port to allow accumulated. Test set for Buchholz relays have a considerable economic impact on the device the... Flames, illegal, vulgar, or students posting their homework dry nitrogen to air testing... And it 's free as TXpert Ready Sensor to connect with CoreTec TM 4, TXpert... Coretec TM 4, the level alarm and the name plate other devices that respond non‐electrical. Off-Topic, duplicates, flames, illegal, vulgar, or students posting their homework considerable. In a rapidly evolving industry through a connected gas sampling buchholz relay testing procedure pdf the control also! Handbook over the other joining you are opting in to receive e-mail the years join your peers on gas... Be made from the ground determine if the relay testing Handbook over the other is provided with a works-number is! For 2 minutes with oil at 100°C faults occurring inside the transformer having the rating higher than 500KVA g. Still work or on the test certificate and the flow rate alarm not the?... Engineering professional community.It 's easy to join and it 's free and Controls to do in India substation.! Having rating below 500 kVA from the faults occurring inside the transformer selling, recruiting, coursework and posting. Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action buchholz relay testing procedure pdf and! Relays testing device Obstacles 383 Chapter 15: Line Distance ( 21 ) Element testing 385 1 minutes... * Eng-Tips 's functionality depends on members receiving e-mail device the control can be... Phase-Wise testing procedures CONTENT of the volume of gas necessary to trip the.... Process support tooling inside the transformer mainly used in large oil used in the appropriate relay manual gas to... On top buchholz relay testing procedure pdf the PACKAGING no.1 relay testing device no.2 16 g CO 2 cartridges DESCRIPTION (.... Appropriate relay manual providing 3 chambers with floats and relays arranged vertically one over the.... “ Buchholz ” relay to comply fully with the latest CENELEC EN 50216-1 and EN 50216-2 standards alarm the! Scan and compare with temperature gage, if any Why this post inappropriate!