Functional description
24 100.000-count Graphical Multimeters
Functional description (cont’d)
Access to secondary functions
Choice of secondary functions on the two displays 2, 3 and 4 by pressing
successively on the key opposite according to main measurement.
A long pressing deletes the display of secondary measurements.
For the main authorised measurements, the last combination selected for
displays 2, 3 and 4 is memorised and will be directly reactivated.
Table of secondary
functions
MTX 3283
MTX 3283
MTX 3283
MTX 3282 MTX 3283
MTX 3282 MTX 3283
MTX 3282 MTX 3283
MTX 3282 MTX 3283
(∗∗)
reset to zero: by
pressing on key.
Function MATH = y = Ax + B ( MTX 3282, MTX 3283 )
FREQ = Frequency measurement
PER = Period measurement
dB = Measurement of voltage decibels in dB
dBm = Measurement of power decibels in dBm with REF = dBm REF
Pk+ = Measurement of positive peaks (∗∗)
Pk- = Measurement of negative peaks (∗∗)
CF = Measurement of peak factor
w = Calculation of resistive power with REF = W REF
V x A = Calculation of power (∗) limited to 400 Hz
DC+ = Measurement of positive duty ratio
DC- = Measurement of negative duty ratio
PW+ = Measurement of pulse-width or of positive durations
PW- = Measurement of pulse-width or of negative durations
CNT+ = Counting of positive pulses (∗∗)
CNT- = Counting of negative pulses (∗∗)
Upon activation of dB measurements
MTX 3283
, the value measured is taken
as voltage reference (V ref). The calculation is as follows: 20 log
10
(V measured
/ V ref).
The voltage reference (V ref) cannot be modified.
The MATH function is displayed when its parameters allow it (see MATH Func.).
For the dBm and resistive power measurements, see Measurement menu for
the adjustment of related reference resistances (dBm REF, W REF) and to
know the calculation formulas.
The calculation of power V x A (VA)
MTX 3282
MTX 3283
requests a 3rd
connection to the A input (connected to the same circuit) in order to measure
simultaneously: DC voltage (main display), DC power (display 3, measurement
always in AC+DC).
The link on the COM input must be short and have a large diameter in
order to limit the voltage drop which influences the Volt measurement.
Display 1: Main measurement
Display 2
Display 3
Display 4
V
AC
V
AC+DC
V
DC
A
AC
A
AC+DC
A
DC
Hz
Ω
FREQ
Hz
PER
S
Func. MATH
x
x
FREQ
Hz
dB
dB
Func. MATH
x
dBm
dBm
REF
(dBm)
Ω
Func. MATH
x
Pk+
V or A
Pk-
V or A
CF
- x
x
w
W
REF (
Ω
ΩΩ
Ω
)
Ω
Func. MATH
x
x
x
x
PER
S
DC+
%
Func. MATH
x
PER
S
DC-
%
Func. MATH
x
PW+
S
CNT+
-
Func. MATH
x
PW-
S
CNT-
-
Func. MATH
x
Func. MATH
- - - x
V x A
VA
A
A
Func. MATH
x (∗)
x
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