Omicron CMC 356, User Manual

Page: 73 / 142

Technical Data
73
Table 6-28:
Data for potential-sensing
operation
Table 6-29:
Data for potential-free
operation
6.10.6 Multimeter Mode
This operating mode is designed for measuring steady-state signals (e.g.,
also non-sinusoidal shaped signals). Measurements such as rms values,
phase angle, frequency, etc. can be performed.
The input signals are processed in real time without delay.
Data for Potential-Sensing Operation
Threshold voltage data per input
range Setting range Resolution
100 mV
1 V
10 V
100 V
600 V ± 140 mV
± 1.4 V
± 14 V
± 140 V
± 600 V 2 mV
20 mV
200 mV
2 V
20 V
Max. input voltage CAT II / 600 V
rms
(850 V
pk
)
CAT III/ / 300 V
rms
CAT IV / 150 V
rms
Threshold voltage accuracy
1
per range:
100 mV, 1 V, 10 V, 100 V,
600 V
1
Valid for positive voltage signal edge; percentage is shown in respect to each range’s
full-scale.
Error:
typical < 2 %, guaranteed < 4 %
typical < 5 %, guaranteed < 10 %
Threshold voltage hysteresis 1…5 % of the specified input in
reference to each range’s full-scale
Input impedance
500 k
Ω
(|| 50 pF)
Data for Potential-Free Operation
1
1
Refer to figure 5-2, "Simplified circuit diagrams of binary inputs and outputs (CMC 356
standard, without option ELT-1 installed)" on page 28.
Trigger criteria
Logical 0: R > 80 k
Ω
Logical 1: R < 40 k
Ω
Input impedance
162 k
Ω
(|| 50 pF)