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Chapter II
MX 650 / MX 655
27
5. TECHNICAL SPECIFICATIONS
5.1. General
Only the values assigned tolerances or the limits declared
constitute guaranteed values. The values without any
tolerance are given as indications.
The symbol is displayed when input signal exceeds
measuring limit in 40 A~ (MX 650), 40 and 400 A~ (MX 655),
resistance and continuity range.
In voltage, current and frequency range, this symbol will not be
shown even the read reach the measuring limit of :
750 VAC, 1000 VDC, 1000 AAC/DC, 10 Hz.
5.2. Characteristics
Accuracy is to within ± [% of the reading (L) + number of
counts (ct)] in the reference conditions indicated in the
appendix.
(MX 655) When measuring U rms and I rms, add ± 1% L
additional error margin, from 5% to 50% of the range for a
maximum peak factor of 6, and from 5% to 100% of the range
for a peak factor of between 1.4 and 3.
Over and above these limits, accuracy is not specified.
5.2.1. Direct voltage (automatic ranges)
(MX 650)
Range Meas. range Resolution Accuracy
400 V 0.2 to 399.9 V 0.1 V 0.75% L + 2 ct
1000 V 400 to 1000 V 1 V 0.75% L + 2 ct
Protection against overloads: 1000 Vrms
(MX 655)
Range Meas. range Resolution Accuracy
400 V 0.2 to 399.9 V 0.1 V 1% L + 2 ct
1000 V 400 to 1000 V 1 V 1% L + 2 ct
Protection against overloads: 1000 Vrms
5.2.2. Alternating voltage (automatic ranges)
(MX 650)
Range Meas. range
Frequency Resol.
Accuracy
400 V 0.5 to 399.9 V
50…500 Hz
500…1000 Hz
0.1 V 1.2% L + 5 ct
1.5% L + 5 ct
750 V 400 to 750 V
50...500 Hz
500…1000 Hz
1 V 1.2% L + 5 ct
1.5% L + 5 ct
Input impedance: 10 M
Protection against overloads: 1000 Vrms
(MX 655)
Range Meas. range Frequency Resol.
Accuracy
400 V 0.5 to 399.9 V 50…500 Hz
500…1000 Hz
0.1 V 1.5% L + 5 ct
1.8% L + 5 ct
750 V 400 to 750 V 50...500 Hz
500…1000 Hz
1 V 1.5% L + 5 ct
1.8% L + 5 ct
Input impedance: 10 M
Protection against overloads: 1000 Vrms
5.2.3. Direct current (MX 655 only)
Range Meas. range Resolution Accuracy
40 A 0.10 to 39.99 A 0.01 A 2.5% L + 10 ct
400 A 40.0 to 400.0 A 0.1 A 2.5% L + 10 ct
1000 A 400 to 1000 A 1 A 2.5% L + 10 ct
Protection against overloads: 1200 ARMS
14


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