HP 400E, Руководство по эксплуатации и обслуживанию

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Models 400E/400EL
Section
V
Table 5-2. Accuracy Tolerances
3 Volt Range
1 Volt Range
/).
Frequency
(Hz)
Voltage Meter
DC OUTPUT Voltage Meter
DC OUTPUT
Input (% of reading) (Volts) Input
(% of reading) ( Volts)
10
3
3.00 ± 5% 0.949 ± 0.047 1.0 1.00 ± 5% 1.00.± 0.05
2 2.00 ± 6.3% 0.633 ± 0.040 0.5 0.50 ± 7.5% 0.50 ± 0.038
1 1.00 ± 10% 0.316 ± 0.032
0.3 0.30 ± 10.8% 0.30 ± 0.033
40 3 3.00 ± 1 % 0.949 ± 0.010 1.0 1.00 ± 1 %
1.00 ± 0.010
2 2.00 ± 1.5%
0.633 ± 0.010 0.5
0.50 ± 2%
0.50 ± 0.010
1
1.00 ± 3% 0':31 6 ± 0.01 0.3 0.30 ± 3.3% 0.30 ± 0.010
100 3 3.00 ± 1 % 0.949 ± 0.010 1.0 1.00 ± 1 %
1.00 ± 0.01
or 2
2.00 ± 1.5% 0.633
±
0.010 0.5 0.50 ± 2% 0.50 ± 0.01
400 1 1.00 ± 3% 0.316 ± 0.01 0 0.3 0.30 ± 3.3%
0.30 ± 0.01
500k 3 3.00 ± 1%
0.949 ± 0.010
1.0
1.00 ± 1 % 1.00 ± 0.01
2 2.00 ± 1.5% 0.633 ± 0.010 0.5 0.50 ± 2% 0.50 ± 0.01
1 1.00 ± 3% 0.316 ± 0.010
0.3
0.30 ± 3.3%
0.30 ± 0.01
1 M 3 3.00 ± 1 % 0.949 ± 0.010
1.0
1.00
±
1 %
1.00 ± 0.01
2 2.00
±
1.5%
0.633
±
0.010 0.5 0.50 ± 2% 0.50 ± 0.01
1 1.00 ± 3% 0.316 ± 0.010 0.3 0.30
±
3.3%
0.30 ± 0.01
4 M 3 3.00 ± 3% 0.949 ± 0.029 1.0 1.00 ± 3%
1.00 ± 0.03
2
2.00 ± 3.8%
0.633 ± 0.024 0.5 0.50 ± 4.5% 0.50 ± 0.023
1 1.00 ± 6% 0.316 ± 0.019 0.3 0.30 ± 6.5% 0.30 ± 0.020
10 M
3
3.00 ± 5%
0.949 ± 0.0475
i
1.0
1.00 ± 5%
1.00 ± 0.05
2 2.00 ± 6.5%
0.633 ± 0.0411
0.5
0.50 ± 8% 0.50 ± 0.04
1
1.00 ± 15% 0.316 ±
0.3
0.30 ± 12%
0.30 ± 0.036
/).
These tolerances can also be used on
the (ollowing ranges:
10 mV, 100mV,
The test oscillator used must have
very low distortion (Jess than
1%).
A thermal converter and an average
responding circuit react differently
to distortion, and any distortion
present would create a calibration
error.
5·16. Reference Supply Calibration.
5-17. Use the following procedure to calibrate the
thermal converter and reference supply.
a. Connect the dc standard, the 400E/EL, the
null vo ltmeter, the reference supply, and a 3
volt thermal converter (H02-II049A with
600 ohm input impedance) as shown in
Figure 5-2. Set switch SI to position A
connecting the dc standard output to the
thermal converter input. The reference
supply and the thermal converter are
s e n s i ti ve
to vari ations in ambient
temperature. Ensure that the ambient
temperature variations are less than ±2.0D C.
If a 400E/EL Option 02 instrument
is
used. set the REL. REF
adjustment to the fully clockwise
ABSO LUTE p osition b e fore
making accuracy check.
b.
Set the dc standard output to +3.000 volts
dc.
5
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3