InsulGard System Installation and Start Up Guideline131.3 Circuits integrity test1) Check InsulGard Power Supply Voltagea) The voltage between Line and Neutral contacts of the Insulgard power input must be 115 or 230 VAC +/-10% in accordance with voltage on InsulGard label.b) The voltage between Neutral and Ground contacts of the Insulgard power input must be near zero.c) Verify that wire to the closest Ground has good contact with Ground. The voltage between this Ground andInsulGard power input ground contact must be near zero.If insulating transformer is used for power supply to InsulGard check ground connections and voltage betweenLine and Neutral only. Using of autotransformer is not recommended, if used, be cautious – neutral should haveground voltage. Don’t use UPS power.d) Fill out Table 1 in Appendix 2 with test results (Link).2) Check external auxiliary sensors connectiona) Units mounted on a panel and inside enclosures will generally have external temperature and humiditysensors. Check that external sensors are properly wired to the Sensor Interface Board.b) Measure resistance between temperature sensor inputs. Resistance between contacts 1 and 2 on thesensor interface board should be ~2 Ohm or less depending on wires length. Resistance between contacts1 and 3 should be ~100-130 Ohm for platinum RTD.c) Measure the resistance of connected Load sensor (CT). Resistance between contacts 5&6 on sensorinterface board should be ~30-40 Ohm with sensor connected or ~100 Ohm without.d) Fill out Table 2 in Appendix 2 with test results - Link .3) Check PD sensors connectionMeasure resistance of each PD sensor across channel terminals on the Sensor Interface Board and fill outTables 3, 4 and 5 in Appendix 2 - LinkFor IPDS this resistance should be close to 3kOhm.For RFCT and RTD-6 sensors this resistance should be ~2 ohms or less. Basically it is the resistance of the coaxcable and depends on its length.