Specifications

u.
Disconnect the termination/attenuator/BNC
Tee combination from the DMM.
v. Connect the terminated end of the
termination/attenuator/BNC Tee combination
to the 1820/1822 +INPUT.
w.
Connect the DMM to the free female end of
the BNC Tee connector.
x.
Adjust the sine wave generator output
amplitude to read 200 mVrms + 50 mV on the
DMM.
y. Record the DMM reading to 100 p.V in the
Test Record as ’Sine Wave Generator Output
Voltage’.
z. Disconnect the DMM cable from the BNC
Tee.
aa. Connect the DMM cable to the 1820/1822
AMPLIFIER OUTPUT connector.
bb. Insert the precision 50 f) termination between
this cable end the banana plug adapter on the
DMM.
cc. Set the 1820/1822 GAIN to XI0.
dd. Divide the sine wave generator amplitude
recorded in step 3-q by the actual attenuation
calculated in step 3-1. This represents the
actual voltage on the input of the amplifier.
ee. Record the result as ’Actual Amplifier Input
Voltage’ in the Test Record.
ff. Multiply the actual input voltage as recorded
in step 3-w by 10.0 to obtain the expected
output voltage.
gg. Record the result to four digit resolution as
’Expected Amplifier Output Voltage’ in the
Test Record.
hh. After the DMM reading has stabilized, record
the measured voltage to 100 !aV resolution as
’Measured Amplifier Output Voltage’ in the
Test Record.
ii. Calculate the error by dividing the measured
output voltage recorded in step 3-z by the
expected output voltage recorded in step 3-y.
Subtract 1.0 from this ratio and multiply by
100% to get the error in percent.
(.Measured Output Voltage _ 11 x 100%
Error= ~, Expected Output Voltage
)
4-5
182011822 Operator’s Manual
jj. Record the calculated error to two decimal
places (+0.xx%) in the Test Record as ’X
Gain Error’.
kk. CHECK -- That the calculated error is less
than + 1%.
11. Press the XI00 GAIN button on the
1820/I 822.
mm. Multiply the actual input voltage of the
1820/1822 which was recorded in step 3-w by
100.0.
nn. Record the result to four digit resolution in the
Test Record as ’Expected Amplifier Output
Voltage’.
oo. After the DMM has stabilized, record the
measured output voltage to 1 mV resolution
as ’Measured Amplifier Output Voltage’ in
the Test Record.
pp. Calculate the error by dividing the measured
output voltage recorded in step 3-gg by the
expected output voltage recorded in step 3-ff.
Subtract !.0 from this ratio and multiply by
100% to get the error in percent.
I
Measured Output Voltage
1") x 100%Error = Expected Output Voltage
)
qq. Record the calculated error to two decimal
places (+0.xx%) in the Test Record as X i00
Gain Error.
rr. CHECK -- That the calculated error is less
than + 1%.
ss. Press the +10 ATTENUATOR and then the
X1000 GAIN button on the 1820/1822.
tt.
Divide the actual input voltage recorded in
step 3-w by the internal +10 attenuation
factor, recorded in step 2-d. This represents
the effective amplifier input voltage.
Multiply this number by 1000 to get the
expected output voltage.
uu. Record this reading as ’Expected Amplifier
Output Voltage’ in the Test Record.
vv. After the DMM has stabilized, record the
measured output voltage to I mV resolution
in the Test Record as ’Measured Amplifier
Output Voltage’.