Copyrighted material licensed to BR Demo by Thomson Reuters (Scientific), Inc., IECTR62354:2014@IEC2014 - 143 - 13.4.22FailuresofTHERMOSTATS Standard(s): Subclause(s): 13.4.22 Failure of THERMOSTATS IEC 60601-1:2005 13.2.4 a) Equipment needed for the test: 1)Temperature sensors (thermocouples)and recorder 2) Test corner b)Safetyprecautions during the test: Suitable fire extinguisher Use normal laboratory safety PROcEDURES during this test. c) Test sample preparation: Onerepresentativesampleloadedwithall optional AccEssoRIEs. d) Test conditions: Do not perform this test If an independent non-SELF-RESETTING THERMAL CUT-OUT is provided that , subscriptions.techstreet.com, downloaded on Nov-27-2014 by James Madison. No further reproduction or distribution is permitted. Uncontrolled when print e) Test set-up and PROCEDURE: 1) Inspect the circuit diagram to determine whether short-circuiting or interrupting the THERMosTAT is the less favourable test condition. Use that mechanism to short-circuit or interrupt the THERMOSTAT. 2) Place the DUT in the test corner. 3) Operate the DUT and record temperatures withthe thermocouple method. 4) Operate the DUT at 90 % and 110 % of RATED voltage. 5) Test each THERMOSTAT by itself if multiple THERMOSTATS exist. f)Presentationofthetestresults: For SUPPLEMENTARY and REINFORCED INSULATION of thermoplastic materials,perform the ball- pressure test (test 13.3.4) at a temperature 25 °C higher than that measured during these tests. Same result table as for normal heating in test 13.4.17 f) and same compliance criteria as in test 13.2.24 f). - 144 IECTR62354@IEC2014 13.4.23 Impairment of cooling Standard(s): Subclause(s): 13.4.23 Impairment of cooling IEC60601-1:2005+AMD1:2012 13.2.7 a) Equipment needed for the test: 1) Temperature sensors (thermocouples)and recorder 2) Accessories for blocking vent holes/grills, etc. 3) Test corner b) Safety precautions during the test: Suitable fire extinguisher Use normal laboratory safety PROcEDURES during this test. c) Test sample preparation: One representative sample loaded with all optional AccEssoRIEs. d) Test conditions: , subscriptions.techstreet.com, downloaded on Nov-27-2014 by James Madison. No further reproduction or distribution is permitted. Uncontrolled when print As for normal heating (test 13.4.17) e)Test set-up and PROCEDURE: 1) Place the DUT in the test corner. Impairment of cooling simulates one fault after the other, for example: 2) Lock ordisconnect singleventilation fans, whichever is leastfavourable, consecutively Impair ventilation through openings in top and sides by covering those ENCLosuRE openings or positioning the DUT against walls of test corner. Block filters. Interrupt the flow of a cooling agent. 3) Operate the DUT with simulation of impairments of cooling. 4) Record temperatures using the thermocouple method. f) Presentation of thetest results: For SUPPLEMENTARY and REINFORCED INSULATION of thermoplastic materials, perform the ball- pressure test (test 13.3.4) at a temperature 25Chigher than that measuredduring these tests. Same result table as for normal heating in test 13.4.17 f) and same compliance criteria as in test 13.2.24 f). - 145 IECTR62354:2014IEC2014 13.4.24 Locking of moving parts Standard(s): Subclause(s): 13.4.24 Locking of moving parts IEC60601-1:2005 13.2.8 a) Equipment needed for the test: Temperature sensors (thermocouples)andrecorder 1) 2) Ohmmeter 3) Test corner b)Safety precautions during the test: Suitable fire extinguisher (Scientific), Inc., Use normal laboratory safety PROcEDUREs during this test. c) Test sample preparation: One representative sample loaded with all optional AccEssoRIES. d) Test conditions: subscriptions.techstreet.com, Lock moving parts if: accessible moving parts can be jammed; or the DUT can be operated while unattended (this includes MEEQUIPMENT which is automatically or remotely controlled); or the DUT has one or more motors with a locked rotor torque smaller than the full load