4610M - Affects of Adjustments on Ranges

Summary

4610M adjustments have no interaction between the functions. They are 100% independent from each other. Adjustments have no interaction from one range to another within a function with two exceptions.

1. Linearity correction for the DCV function is adjusted on the 20V range at +2.1 VDC and -2.1 VDC. This correction is used only on DC Voltage ranges, but is in use on all of them (200mV, 2V, 20V, 200V and 1kV). 
2. Thermocouple cold junction compensation (CJC) adjustment will affect both Thermocouple Source and Measure modes when Auto Cold Junction is on.

Detail

DCV and DCI

The Zero calibration factor has an effect on the positive and negative gain factors. It will 'Shift' the entire range up and down. This will affect readings in between the zero calibration point and the positive/negative scales. Adjusting only the positive full scale will affect only the positive outputs. Adjusting only the negative full scale will affect only the negative outputs. 

Example 1: 2V DC Range has a +2uV offset across the entire range. The output at 0.000000V dc measures +0.000,002V and at full scale (+1.9) the output is +1.900,002V. The Negative output is reading the same offset (+0.000,002V), resulting in -1.899,998V measurement. Adjusting the ZERO calibration only, to read 'perfectly', the reading is 0.000,000V, +1.900,000V and -1.9000,000V.

Example 2: ZERO is good, positive is good but the negative measurement is -1.900,050V. Adjusting just the negative calibration factor to ‘perfect’ will not affect the 0V or +1.9V.

ACV and ACI

'10%' and 'Gain' correction is performed at 1kHz on each range. 10% scale does not act as an offset (as with DC) rather it is somewhat up the scale. As such, it does not have an impact upon the 'Gain' or Full Scale 1kHz point, but the adjustment will affect all outputs between 10% and just under full scale. Adjustment of 10% and Full Scale affects all outputs across the entire frequency range.  

Frequency response calibration corrects flatness, relative to 1 kHz based on the 10% and full scale points. Adjusting just the frequency point, affects only the output at that frequency up to the next frequency point. Adjustment at 10 Hz will affect outputs between 10 Hz and 44 Hz. An adjustment at 45 Hz will affect outputs between 10 Hz and 999 Hz. An Adjustment at 30 kHz will affect frequencies from 1 kHz to the next adjustment band, but not below 1 kHz

Simulated Resistance and Capacitance

Similar to DC Voltage and Current

Passive Resistance and Passive Capacitance

Each discrete value is independent of all others.