69• Select RCD: Type AC (sinusoidal), Type AC Selective, Type A (half-wave), TypeA Selective, Type B (smooth DC), or Type B Selective.• Memory RECALL.10• RCD test polarity (0, 180 degrees).• Insulation test voltage (100, 250, 500, or 1000 V).• Memory CLEAR.11 Continuity.12 Insulation resistance.13 Loop impedance — Hi current trip mode14 Loop impedance — No trip mode.15 RCD tripping time.16 RCD tripping level.17 Volts18 Phase rotation.19 Earth resistance.20 Rotary switch.Understanding the DisplaybL3840393034 33323128373536CompkAVHz292724 26252321 22Number Description21 Displays the selected Memory mode. Memory modes are: Select (F1), Store (F2),Recall (F3), or Clear (F4).22Configuration options. Settings you can make within the measurementfunctions. For example, in the RCD Tripping Time function (PT) you can pressF2 to multiply the test current by x1/2, x1, x5 and you can press F3 to select thetype of RCD you are testing.23 Arrows above or below the terminal indicator symbol indicate reversed polarity.Check the connection or check the wiring to correct.