Metrix MTX 3292 - Page 48

Technical characteristics
48 100,000 cts digital multimeters
Technical characteristics of the MTX 3292, MTX 3293 (continued)
AC and AC +
DC voltages
With this function, the user can measure the true RMS (TRMS) value of an AC voltage with its
DC component (no capacitive coupling) or without its DC component.
VAC RMS
VAC+DC TRMS
VlowZ
The 100mV range is available only in Manual mode, by " ".
In the VAC & VAC+DC modes and for signals >1kHz, the range of uncertainty displayed is
given for information only: we recommend using the formulas below.
VLowZ: The error should be slightly greater than the error in VAC.
MTX 3292
Range
Input
impedance
Resolution
Accuracy
45Hz to 1kHz
1 to 100kHz
100mV ()
10MΩ
1μV
1% L ± 50 D
1%L + 0.1% x [F(kHz) - 1]L ± 50D
1,000mV
11MΩ
10μV
0.5% L ± 50 D
0.5%L+ 0.25% x [F(kHz) - 1]L ± 50D < 10kHz
2.75%L+ 0.04% x [F(kHz) - 10]L ± 50D > 10kHz
10V
10.5MΩ
0.1mV
0.3% L ± 50 D
0.3%L + 0.04% x [F(kHz) - 1]L ± 50D
100V
10MΩ
1mV
0.3% L ± 50 D
0.3%L+ 0.03% x [F(kHz) - 1]L ± 50D
1000V()
10MΩ
1mV
0.3% L ± 50 D
0.3%L+ 0.02% x [F(kHz) - 1]L ± 50D
() not contractual indicative values (see curves below)
() limitation at high frequency
() BP: Freq [kHz] limited to: 15,000/U input [V]
U input [V] limited to: 15,000/Freq [kHz]
 Example: U input = 1,000 VAC  Max. frequency: 15,000/1,000 = 15kHz
In the presence of a DC component: additional error: (UDC/U measured)x(0.7% + 70 D)
 Example: UDC = 2V, U measured = 5 Vrms  Additional error: 0.28% + 28 D
- Rejection: common mode >80dB at 50Hz or 60Hz depending on selection
- Automatic or manual selection of the ranges
- Protection by varistors
- Maximum acceptable permanent voltage: 1,414 Vpk
- Specifications valid from: 10 to 100% of the range in the band from 20kHz to 100kHz
- Influence of the peak factor on the accuracy in VAC, VAC+DC at 50% of the range:
1% for a peak factor <3.
 As soon as the PEAK symbol appears, use the AUTO PEAK mode.
Response
curves


Range 100mV AC+DC
-6
-5
-4
-3
-2
-1
0
1
0 20 40 60 80 100 120
kHz
%
10mV
80mV
Range 1V AC+DC
-2
-1,5
-1
-0,5
0
0,5
1
1,5
2
0 20 40 60 80 100 120
kHz
%
100mV
800mV
()
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