XS series operating manualXS user manual v0.55 - 51 -Display shows :Fig 7.4Select the number to be modified by moving the cursor with the RIGHT/LEFT arrow keysIncrease or decrease the value with respectively the UP and the DOWN arrow keys (0 1 2 3 4 5 6 7 89. 0 1 2 3 etc)Repeat operation for all the numbers if necessary With the RIGHT arrow key, move the cursor up to the unity zone Scroll the unity:K (1 000 ohms),M (1 000 000 ohms),G (1 000 000 000 ohms)T (1 000 000 000 000 ohms).Enter the threshold with the ENTER keyWARNING : the HI LIMIT must be always higher than the LO LIMIT, otherwise an error message isdisplayed :HI LIMIT < LO LIMIT To set the LO LIMIT value proceeds the same way as for the HI LIMIT.WARNING: the LO LIMIT must be always lower than the HI LIMIT, otherwise an error message isdisplayed:LO LIMIT > HI LIMITTimer operationThe unit is equipped with a timer to define the insulation resistance measurement time (from 1 upto 999 seconds). This feature is particularly interesting when measuring on capacitive specimensof which the insulation resistance increases as a function of the measurement time. At the end ofthe test time, the unit automatically stops the test and memorizes the last measured value on theLCD screen.In case where a test time is set to 0, the unit remains in the measurement mode permanently untilthe [DISCHARGE] key is pressed.