The second signal is the status Normal or Forced. Forced status is onlyachieved when the BO is set to “Forced” or operated on the LHMI.Set the parameter TestMode to “Off” after completing thesetests. The Start LED stops flashing when the relay is nolonger in test mode.An initially high contact resistance does not cause problems as it is reduced quickly bythe electrical cleaning effect of fritting and thermal destruction of layers, bringing thecontact resistance back to the mOhm range. As a result, practically the full voltage isavailable at the load.7.3.3.2 Inspecting the RTD wiring• Verify the sensor measuring mode by using a suitable resistor instead of a realsensor.• PT100 80...170 Ω• PT250 220...430 Ω• NI100 80...240 Ω• NI120 100...280 Ω• CU10 8...16 ΩResistance measuring mode can be verified with a resistance from 0...10 KΩ.Table 18:Examples of temperature and resistancePT 100 PT 250 NI 100 NI 120 CU 10R °C °C °C °C °C7.5 - - - - -39.88.2 - - - - -21.69.1 - - - - 1.710 - - - - 2511 - - - - 50.912 - - - - 76.913 - - - - 102.815 - - - - 154.682 -45.8 - -34.2 - -91 -23 - -16.5 -46.7 -100 0 - 0 -31.5 -110 25.7 - 18 -15.5 -120 51.6 - 35 0 -150 130.5 - 82.6 43.3 -160 157.2 - 97.5 56.8 -180 - - 125.5 84 -Table continues on next page1MRS756509 E Section 7Troubleshooting630 series 91Operation Manual
