9500B
Calibration Manual
52
Note
Make sure to allow for any settling time of the external measuring
instrument.
6.
Calculate the lower and higher absolute limit values:
Lower limit: (L lim) = R ref - (R ref x 0.001)
Higher limit: (H lim) = R ref + (R ref x 0.001)
Enter L lim and H lim into the appropriate columns in Table 9.
7.
If using the Model 4955 Calibration Adaptor:
a.
Set the Model 4955 Calibration Adaptor switch as shown in Table 9.
b.
Reconnect the Active Head output BNC to the Model 4955 input.
8.
If not using the Model 4955, disconnect the load resistor from the DMM, and
reconnect it to the 9500B Active Head output BNC.
9.
Press the ON key to turn the 9500B output on.
10.
Using the 9500B, take a Resistance measurement and note the result (R meas) in
Table 9.
11.
9500B: Set OUTPUT OFF.
Table 9. Load Resistance Measurement Verification
Verif. Point
Θ
4955
Switch
Position
Resistance
Value
Measured
by DMM
Calculated Absolute
Limits
4955
Switch
Position
Resistance
Value
Measured
by 9500B
Lower
Higher
Op. 3(b)
(Rref)
(L lim)
(H lim)
Op. 7(a)
(Rmeas)
RES1
Ref 1 M
Ω
Meas
1
M
Ω
RES2 Ref
50
Ω
Meas
50
Ω
