Chapter II
Benchtop multimeter
24
4.3. REL
key
Short press : Mode REL, the last value measured becomes the reference value derived
from subsequent measurements.
Long press : When in REL mode, a long press displays the reference being used. This
value may be adjusted using the SEL key (selection of digits and a
sign) and the RANGE key (increment the selected digit).
4.4.
Pk +/- key
The fast positive or negative peak measurement functions (
≥
1 msec.) can be accessed by
repeatedly pressing this key in the V
DC
, mV
DC
, 5 mA
DC
, 50 mA
DC
, 500 mA
DC
, and 10 A
DC
functions.
4.5. MEM
key
Short press :
Fixes the display on the current value.
Long press :
Accesses or quits the “autostore” mode. Can be accessed in the V
DC
, mV,
V
AC
positions.
Autostore
Set the probes on the point to be measured. An audio signal indicates if the measurement
is stable. When you remove the probes, a second audible signal indicates that this stable
value displayed has been stored.
5. TECHNICAL
SPECIFICATIONS
Only those values assigned tolerances or limits are guaranteed values. Values without
tolerances are given for information only (French standard NF C 42-670).
{Accuracy : ‘’n%R + nD’’ means ‘’n% of the r n digits’’ as per IEC 485}
5.1. DC
voltages
Selector
switch
position
Ranges
Accuracy
Input
impedance
Protection
Resolution
mV
500 mV
0.1 % R + 2D
10 M
Ω
± 1100 V
PK
*
10 µV
5 V
0.1% R + 2D
11 M
Ω
± 1100 V
PK
100 µV
V
DC
50 V
0.1% R + 2D
10 M
Ω
± 1100 V
PK
1 mV
500 V
0.2% R + 2D
10 M
Ω
± 1100 V
PK
10 mV
1000 V
0.3% R + 2D
10 M
Ω
± 1100 V
PK
100 mV
* 1 mn max
Number of points:
50 000 (or 5 000 - refer to § 3.3.)
Range selection:
Automatic or manual for the 5 V, 50 V, 500 V,
1000 V ranges
Common mode rejection:
At 50 and 60 Hz, better than 120 dB
Serial mode rejection:
At 50 and 60 Hz, better than 60 dB
Additional error in Pk +/- mode for a pulse of
≥
1 ms: 1% R
±
50 D
For measurements performed on alternative signals, the selected range must tally with the
max. value of the signal peak.
Summary of Contents for MX 553
Page 2: ...Multim tre de table...
