Operator`s manual

Signametrics 18
Range Full Scale
Reading
Resolution One Year
23°C ± 5°C
1,200 pF 1,199.9 pF 0.1 pF 1.5 ± 0.25 pF
12 ηF 11.999 ηF
1 pF 1.2 ± 5 pF
120 ηF 119.99 ηF
10 pF 1.0
1.2 µF 1.1999 µF
100 pF 1.0
12 µF 11.999 µF 1 ηF
1.0
120 µF 119.99 µF 10 ηF
1.0
1.2 mF 1.1999 mF
100 ηF
1.2
12 mF 50.000 mF
1 µF
2
[1] Within one hour of zero, using Relative control. Accuracy is specified for values higher than 5% of the selected
range with the exception of the 1,200 pF range.
This Measurement is independent of set Aperture and Read Interval. If desired, the DMMSetCapsAveSamp()
function may be used to control measurement parameters. It is provided
means to fine tune the measurement timing for
the application, trading off accuracy for speed.
Measurement time will vary as function of the set parameters, selected range and measured capacitance. The following are
measurement times associated with the default parameters, as range is selected.
Range Input Measurement Time Measurement Rate (rps)
1,200 pF 5% of Scale
19.5 ms 51.3
1,200 pF Full Scale
52.3 ms 19.1
12 ηF
5% of Scale
70.0 ms 14.3
12 ηF
Full Scale
118ms 8.5
120 ηF
5% of Scale
8.9 ms 112.4
120 ηF
Full Scale
127 ms 7.9
1.2 µF
5% of Scale
15.6 ms 64.1
1.2 µF
Full Scale
175 ms 5.7
12 µF
5% of Scale
14.1 ms 70.9
12 µF
Full Scale
480 ms 2.1
120 µF
5% of Scale
17.3 ms 57.8
120 µF
Full Scale
50.3 ms 19.9
1.2 mF 5% of Scale
52.6 ms 19.0
1.2 mF Full Scale
151.5 ms 6.6
12 mF 5% of Scale
52.8 ms 18.9
12 mF Full Scale
170 ms 5.9