I'm trying to perform the Common Mode Calibration procedures set forth in page 15 of the 6031A service manual (http://cp.literature.agilent.com/litweb ... 9-3344.pdf) and have a few questions:
1) Section b) says short power supply sense terminals (+S to -S) at rear panel, but if the local sensing straps are connected, does it also mean shorting the output terminals as well?
2) I did the setup in Figure 2-1 but the display says OL (overload) for voltages. Did I do anything wrong? I checked to polarities and removed the local sense strap.
3) If I performed Voltage Monitor Zero Calibration, should the initial reading in Common Mode Calibration be close to zero, as achived by the Voltage Monitor Zero Calibration?
4) I tried either way for Common Mode Calibration. Initial readings are either 0.065mV (local sense strap disconnected) or 0.00001mV (with local sense strap connected to output), but after apply 1V between -S (- sense) and -V (- output), I get something like -250mV and adjusting A2R21 all the way only give me somewhere -247mV to -252mV, nowhere close to the initial reading. Am I doing something wrong?
I'm using HP 3478A multimeter and E3640A to generate 1V, and yes, I had a 1kOhm resistor to measure V-MON.
Any advice is appreciated. Thanks a lot in advance.
1) Section b) says short power supply sense terminals (+S to -S) at rear panel, but if the local sensing straps are connected, does it also mean shorting the output terminals as well?
2) I did the setup in Figure 2-1 but the display says OL (overload) for voltages. Did I do anything wrong? I checked to polarities and removed the local sense strap.
3) If I performed Voltage Monitor Zero Calibration, should the initial reading in Common Mode Calibration be close to zero, as achived by the Voltage Monitor Zero Calibration?
4) I tried either way for Common Mode Calibration. Initial readings are either 0.065mV (local sense strap disconnected) or 0.00001mV (with local sense strap connected to output), but after apply 1V between -S (- sense) and -V (- output), I get something like -250mV and adjusting A2R21 all the way only give me somewhere -247mV to -252mV, nowhere close to the initial reading. Am I doing something wrong?
I'm using HP 3478A multimeter and E3640A to generate 1V, and yes, I had a 1kOhm resistor to measure V-MON.
Any advice is appreciated. Thanks a lot in advance.
1) Section b) says short power supply sense terminals (+S to -S) at rear panel, but if the local sensing straps are connected, does it also mean shorting the output terminals as well? The output of the instrument is set to (Zero), the output Current is set to (Zero) & the output is OFF.
Then attach the DVM from Common (M) on the rear panel through a 1K resistor and connect to A2J7 pin3. Then take the initial reading.
2) I did the setup in Figure 2-1 but the display says OL (overload) for voltages. Did I do anything wrong? I checked to polarities and removed the local sense strap. The display says OL (overload) for voltages, are you talking about the instrument or the DVM connected to the 1 K resistor?
Was this Step e done? Remove both local sensing straps from rear-panel terminal block, and connect a 1-volt external power supply with its +
lead to - S and its--lead to - Out. See Figure 2-1.
3) If I performed Voltage Monitor Zero Calibration, should the initial reading in Common Mode Calibration be close to zero, as achieved by the Voltage Monitor Zero Calibration?
4) I tried either way for Common Mode Calibration. Initial readings are either 0.065mV (local sense strap disconnected) or 0.00001mV (with local sense strap connected to output), but after apply 1V between -S (- sense) and -V (- output), I get something like -250mV and adjusting A2R21 all the way only give me somewhere -247mV to -252mV, nowhere close to the initial reading. Am I doing something wrong?
I'm using HP 3478A multicenter and E3640A to generate 1V, and yes, I had a 1kOhm resistor to measure V-MON .
The 1k resistor is connected to (V-MON buffered) on the A2board (J7 pin 3) not to Vm on the rear panel barrier block.
Is the E3640A in CV Constant Current mode?
Any advice is appreciated. Thanks a lot in advance.
wonghoi