I just got a 8903a. Initial inspection showed that AC voltage measurement in the "mV" section is far off: e.g. 100mV AC input shows 17mV on display. Upon start-up, unit is in "V" measurement range and display data shows correct input voltage (e.g. 1V AC input shows correct 1.000 on display). Reducing input voltage from there below 200mV causes the unit to switch to "mV" range and displayed voltage is completely off the chart (see above, e.g. 17mV displayed for 100mV input). Frequency display is correct in all modes. If input voltage is increased again from below 200 mV AC (e.g. back to 1V AC) unit does not switch from "mV" range to "V" range and shows wrong voltage ("0.150"). Powering off the unit and powering back on resets to "V" range and voltages above 200mV AC are displayed correct.
Can somebody provide me with directions where to start my investigation.
I have the manual but I thought before I dig into the service details I'd ask if someone experienced this issue before.
Any feedback is appreciated! Thanks
Can somebody provide me with directions where to start my investigation.
I have the manual but I thought before I dig into the service details I'd ask if someone experienced this issue before.
Any feedback is appreciated! Thanks