Robert, Nutsinee

We have been having a mysterious SHG PZT drift at a rate of 2V/hr overnight when the table was shut and the fan was turned off. The downward drift kept on going for at least 20 hours without a sign of it turning back. The cause is still unclear (I will be posting more about this later in a separate alog). To gather more information we installed a temporary thermistor (a 200k Ohms resistor) near by the SHG housing to see how the temperature behaves around the area (the sensor will move around, for now that's where we started). The box is powered at 5V (external temporary power supply). We borrowed PEM patch panel for the input voltage and the read back. The read back is routed to the PEM rack by HAM4. The channel is PEM-CS_ADC_28_2k_OUT_DQ. The thermistor calibration is 100mV/C.