We posses a sample holder for taking the impedance result for pellets at high temperature. The sample holder has fixure attached which is working fine with HIOKI-3522-50 which shows the open circuit resistance in Mohm. But as soon as we switch on to HIOKI-3532-50 the open circuit resistance shows values in the range of kohm which s not desirable. What can be the possibe reason. please note the impedance analyser seems to work fine as it gives good results with its supplied fixture. Please suggest possible solutions?