Metrix MTX 3290, MTX 3291, ASYC-IV MTX 3290, ASYC-IV MTX 3291 Operating Instructions Manual
Page 1
Portable multimeters
with digital display
ASYC-IV
MTX 3290 - 6000 cts
MTX 3291- 60000 cts
Operating instructions
Pôle Test et Mesure CHAUVIN ARNOUX
Parc des Glaisins - 6, avenue du Pré de Challes
F - 74940 ANNECY-LE-VIEUX
Tel. +33 (0)4 5064 2222 - Fax +33 (0)4 5064 2200
X04065A02 - Ed. 01 - 06/14
Page 2
General directions
2 6,000- and 60,000-count digital multimeters
Contents
General directions ............................................................................................................................................ 3
Introduction, Precautions and safety measures ............................................................................................................. 3
Special functions ........................................................................................................................................................... 4
Symbols on the instrument ............................................................................................................................................ 5
Warranty, Maintenance, metrological verification, Repair under warranty ..................................................................... 6
Maintenance .................................................................................................................................................................. 7
Replacing the fuse ......................................................................................................................................................... 7
Rechargeable and primary batteries ............................................................................................................................. 7
Communication interface ............................................................................................................................................... 7
Description of the instruments .........................................................................................................................
MTX 3290 frontal panel, back, terminal block................................................................................................................ 8
MTX 3291 frontal panel, back, terminal block................................................................................................................ 9
Display unit .................................................................................................................................................................. 10
Switch .......................................................................................................................................................................... 13
Keypad ........................................................................................................................................................................ 15
Getting started ................................................................................................................................................ 18
Preparation for use ...................................................................................................................................................... 18
Functional description ................................................................................................................................... 19
1. MAX MIN AVG mode .............................................................................................................................................. 19
2. PEAK mode ............................................................................................................................................................. 22
3. ΔREL mode ............................................................................................................................................................. 23
4. "CLAMP" function .................................................................................................................................................... 25
Functions of the switch and keys ................................................................................................................................. 26
How are the various quantities measured? ................................................................................................. 28
1. Voltage measurement ............................................................................................................................................. 28
2. Current measurement ............................................................................................................................................. 29
3. Frequency measurement......................................................................................................................................... 31
4. Resistance measurement ........................................................................................................................................ 31
5. Audible continuity measurement ............................................................................................................................. 32
6. Diode test ................................................................................................................................................................ 32
7. Capacitance measurement...................................................................................................................................... 33
8. Temperature measurement ..................................................................................................................................... 34
9. Measurement on an MLI type speed variator .......................................................................................................... 35
10. Resistive power (MTX 3291) ................................................................................................................................. 37
11. dBm decibels in power (MTX 3291) ...................................................................................................................... 38
SX-DMM software ........................................................................................................................................... 39
Technical characteristics of MTX 3290 ........................................................................................................ 40
Technical characteristics of MTX 3291 ........................................................................................................ 50
General characteristics ................................................................................................................................. 61
Environmental conditions ............................................................................................................................................ 61
Power supply ............................................................................................................................................................... 61
Display ........................................................................................................................................................................ 61
Safety, CEM ................................................................................................................................................................ 61
Mechanical characteristics ........................................................................................................................... 61
Housing ....................................................................................................................................................................... 61
Supply ............................................................................................................................................................. 62
Page 3
General directions
6,000- and 60,000-count digital multimeters 3
General directions
Introduction
Congratulations! You have just acquired a portable multimeter with a
display digital.
We thank you for this sign of confidence in the quality of our products.
The line of instruments to which it belongs comprises the following models:
MTX 3290 MTX 3291
Display digital, monochrome,
(70x52)
digital, monochrome,
backlit (70x52)
Power supply 4 R6 primary batteries (AA format) or 4 rechargeable batteries
Counts 6000 60000
Communication - IR/USB
It complies with safety standard NF EN 61010-1 + NF EN 61010-2-030
concerning electronic measuring instruments.
For best results, read this manual closely and observe the precautions of use.
Failure to observe these warnings and/or directions may damage the instrument
and/or its components and may endanger the user.
Precautions and
safety measures
• This instrument is been designed to be used as follows:
- indoors
- in an environment of pollution degree 2
- at an altitude of less than 2000m
- at a temperature between -10°C and 55°C
- at a relative humidity below 80% up to 31°C.
• The safety of any system incorporating the instrument is the responsibility
of the system integrator.
• Can be used for measurements on circuits:
- MTX 3290: 600V, CAT III and 300V, CAT IV.
- MTX 3291: 1000V CAT III and 600 CAT IV.
However, some accessories may lead to the use of this instrument on
circuits of a lower voltage and category.
before use
• Comply with the environmental and storage conditions.
• Check the integrity of the guards and insulation of the accessories. Any item
of which the insulation is deteriorated (even partially) must be removed from
service and scrapped. A change of colour of the insulation is a sign of
deterioration.
during use
• Read closely all notes preceded by the
symbol.
• As a safety measure, use only the appropriate leads and accessories
supplied with the instrument or approved by the manufacturer.
Page 4
General directions
4 6,000- and 60,000-count digital multimeters
General directions (continued)
Safety feature
• It is impossible to open the battery or fuse compartment without first
disconnecting the measurement leads.
• During a measurement exceeding 60V
DC or 25VAC the symbol blinks on
the display unit
• Automatic detection of a connection to the "Ampere" terminal (for both
voltage and current measurements)
• When the maximum permanent voltage or current that can be measured is
exceeded, an intermittent audible signal warns of the risk of an electric
shock.
Features
protecting the
measurement
inputs
These multimeters have several features to protect them:
• varistor protection that clips transient voltage surges on the
measurement terminals.
• PTC (Positive Temperature Coefficient) protection against permanent
overvoltages less than or equal to 1000V during resistance,
capacitance, and diode test measurements.
This protection is reset automatically after the overload.
• a fuse that provides protection during current measurements.
- MTX 3290: 10A
- MTX 3291: 11A
Special functions
Automatic
detection
The number of input terminals is limited to 3: V, COM, A. Connecting the
lead to the "Ampere" terminal automatically selects the corresponding
function.
* When a change of function by the command keypad is
incompatible with the connection of the lead, it triggers an
audible or visual (LEADS) alert.
The current measurement is made with automatic peak range full-scale.
During a current measurement, an audible alert is triggered in the event of a
prolonged absence of current.
Automatic
switching off
If the function is validated ( ), the device is automatically switched off after
30 mn of operation if there has been no action on the front panel during this
time.
* Automatic switching off is disabled:
- in the MAX, MIN, AVG, PEAK Surveillance mode
- in the Communication mode
- if there is a voltage >60V
DC or 25VAC on the terminals of the
multimeter.
Warning
signals
An intermittent audible signal is emitted in all "Voltage" and "Current" settings if
the max. permanent value the device can measure is exceeded. It is
accompanied by display of the "O. L" acronym and of the
symbol on the
display unit.
This symbol is activated when the voltage on the "V" input exceeds 60V
DC or
25V
AC in the "Voltage" setting or when the current injected between the A and
COM terminals exceeds 10A.
Page 5
General directions
6,000- and 60,000-count digital multimeters 5
General directions (continued)
Definitions of the
measurement
categories
CAT II: Test and measurement circuits directly connected to the points of use
of the low-voltage network (power outlets and other similar points).
E.g.: Measurements on the network circuits of household appliances, portable
tools, and similar devices.
CAT III: Test and measurement circuits connected to parts of the low-voltage
network of the building.
E.g.: Measurements on distribution panels (including secondary meters), circuitbreakers, wiring including cables, bus bars, branch boxes, disconnecting
switches, power outlets in the fixed installation, and industrial appliances and
other equipment, such as motors permanently connected to the fixed
installation.
CAT IV: Test and measurement circuits connected to the source of the lowvoltage network of the building.
E.g.: Measurements on devices installed before the main fuse or the circuitbreaker of the building installation.
Warning! Using a measuring instrument, a lead, or an accessory belonging to a lower
measurement or voltage category derates the resulting system (instrument
+ leads + accessories) to the lowest measurement category and/or service
voltage of any of the components.
Symbols on the
instrument
Risk of electric shock: directions for connection and disconnection of the inputs.
Always connect the probes or adapters to the instrument before connecting
them to the measurement points. Always disconnect the probes or cords from
the measurement points before disconnecting them from the instrument. These
directions apply before the instrument is cleaned.
Warning: Hazard. The operator must refer to the manual each time this danger
symbol is encountered.
Device entirely protected by double insulation or reinforced insulation.
Earth
In the European Union, this product is subject to selective collection for the
recycling of electrical and electronic equipment waste in accordance with
Directive WEEE 2002/96/EC: this equipment must not be treated as ordinary
waste. The spent batteries must not be treated as ordinary waste. Take them in
to the appropriate collection point for recycling.
The CE marking indicates conformity with the European "Low Voltage", "EMC",
"WEEE" and "RoHS" directives.
USB (MTX 3291)
IP67
Page 6
General directions
6 6,000- and 60,000-count digital multimeters
General directions (continued)
Warranty
This equipment is warranted for 3 years against any defect of materials or
workmanship, in accordance with the general terms of sale. During the
warranty period, the instrument may be repaired only by the manufacturer, who
reserves the right to repair the instrument or to replace it or part of it. If the
equipment is returned to the manufacturer, the cost of transport to the
manufacturer is borne by the customer.
The warranty does not apply following:
• improper use of the equipment or use in association with incompatible
equipment
• modification of the equipment without the explicit permission of the
manufacturer's technical staff
• maintenance done by a person not approved by the manufacturer
• adaptation to a particular application not anticipated in the definition of the
equipment or by the user manual
• a shock, a fall, or flooding.
Maintenance,
metrological
verification
Before opening the instrument, you must disconnect it from line power and
from the measurement circuits and make sure that you are not charged with
static electricity, which might destroy internal components. An adjustment,
maintenance, or repair of the live instrument must be undertaken only by
personnel who are qualified and have familiarized themselves with the
directions in this manual.
We recommend a verification of this instrument at least once a year. For
checking and calibration, contact one of our accredited metrology laboratories
(information and contact details available on request), at our Chauvin Arnoux
subsidiary or the branch in your country.
Unpacking,
repacking
All of the equipment has undergone mechanical and electrical checks before
being dispatched. When you receive it, carry out a quick check to detect any
deterioration that may have occurred during transport. Should the need arise,
immediately contact our sales department and notify the carrier of the customary
reservations.
Use the original packaging to reship the equipment, if possible. Indicate as
clearly as possible, by a note attached to the equipment, the reasons for the
transfer.
Repair
under warranty
and post warranty
For all repairs before or after expiry of warranty, please return the device to your
distributor.
Page 7
General directions
6,000- and 60,000-count digital multimeters 7
General directions (continued)
Maintenance
• Disconnect everything connected to the instrument and press the ON/OFF
key (
).
• Use a soft cloth, moistened with soapy water.
• Rinse with a damp cloth and dry rapidly with a dry cloth or forced air.
• Make sure that no foreign objects interfere with the operation of the device
by which the leads are snapped into place.
Replacing
the fuse
y Before replacing the fuse (reached by
opening the bottom compartment), disconnect
the instrument from any source of current.
During the replacement, make sure that only a
fuse of the appropriate rating and specified
type is used. Using another type of fuse and
shorting the fuse holder are strictly forbidden.
y Checking the current fuse:
Fuse: SIBA/5019906
MTX 3291: 11A: 10x38 – 1,000V - F
breaking capacity: >20kA
MTX 3290: 10A: 6x32 - 600V - F
breaking capacity: >50kA
Rechargeable
and primary batteries
The multimeter is powered by primary or rechargeable batteries (see above).
To charge the rechargeable
batteries (set of 4 NI-MH LSD
batteries), use an external rapid
charger, available as an accessory
.
* After replacing the batteries,
wait 10s before switching the instrument back on.
Active
communication
interface
(MTX 3291 only)
The multimeter can communicate with a PC via the USB link.
The basic version includes a USB link using an isolated optical USB cord (type
HX0056Z) and SX-DMM software, plus Labview and Labwindows drivers to
program the devices.
* MTX 3291: They can also be programmed via the SCPI protocol:
- to program via Labview/LW
- to recover data or program the instrument using the software
- to calibrate the MTX 3291
Page 8
Description of the instruments
8 6,000- and 60,000-count digital multimeters
Description of the instruments
MTX 3290
Frontal panel
Back
Prop
Terminal block
Optical connector:
not active !
Page 9
Description of the instruments
6,000- and 60,000-count digital multimeters 9
Description of the instruments (continued)
MTX 3291
Frontal panel
Back
Prop
Terminal block
Optical connector: active!
Page 10
Description of the instruments
10 6,000- and 60,000-count digital multimeters
Description of the instruments (continued)
Display unit
The display is in two parts:
• A digital display for convenient reading of the digits:
- main display unit: 12.7mm
- secondary display unit: 9.7mm
• The "bargraph" display (61 segments) with scale (indication of the
measurement range) for an analogue reading
Quantities
measured
• V
LowZ AC voltage measurement at low impedance (VLowZ)
• V
AC AC voltage measurement
• V
AC/DC DC or AC+DC voltage measurement at high impedance (V)
• A Current measurement A
• Hz Frequency measurement
• Resistance measurement
• µF Capacitance measurement
• T° Temperature measurement
• ms Measurement of the period
• % Measurement of relative value
Units
• V Volt
• A Ampere
• Hz Hertz
• Ohm
• F Farad
• °F Degree Fahrenheit
• °C Degree Celsius
• ms millisecond
• k kilo k-kHz
• M Mega M-MHz
• n nano nF
• µ micro µV-µA -µF
• m milli mV-mA -mF
• % Percentage
MTX3290
double 6,000-pts display
MTX 3291
double 60,000-pts display
Page 11
Description of the instruments
6,000- and 60,000-count digital multimeters 11
Description of the instruments (continued)
Symbols Designation
AC
Measurement of the AC signal
DC
Measurement of the DC signal
AC+DC
Measurement of the AC and DC signal
AUTO
Automatic range switching
Δ REL
Values relative to a reference
REF
Reference value
HOLD
Storage and display of stored values
MAX MIN AVG
RMS value (surveillance)
MAX
Maximum RMS value
MIN
Minimum RMS value
AVG
Mean value
PEAK
Peak value
PEAK+
Maximum peak value
PEAK-
Minimum peak value
.run r.un ru.n
Capacitance meter, acquisition in progress
----- Frequency measurement impossible
O.L
Overshoot of the measurement capacities
USER
USER mode (on main display unit)
BASIC
BASIC mode (on main display unit)
Z
Hertz symbol (main display unit)
Z
Hertz symbol (secondary display unit)
Ω
Ohm (main display unit)
Ω
Ohm (secondary display unit)
%
Percentage
Positive pulse
Negative pulse
PT100
Symbol for temperature measurement using a Pt100 probe
PT1000
Symbol for temperature measurement using a Pt1000 probe
Symbol for measurement using a current clamp
LEADS
Function selected incompatible with the connection of the lead
LowZ
Low-impedance voltage measurement
♪
Symbol of the audible continuity measurement
Symbol of the measurement and testing of a semiconductor junction
Warning, possibility of electric shock (∗)
USB communication (MTX 3291)
300Hz filter
Auto power OFF deactivated (permanent mode)
Page 12
Description of the instruments
12 6,000- and 60,000-count digital multimeters
Description of the instruments (continued)
This symbol indicates the battery charge level.
Volt, Ohm, temperature, etc. measurement input
COM measurement input
Ampere measurement input
600V CAT III
Input indication
1000V CAT III
Input indication
Isolated optical link (USB) input
Display of unit on the main display unit (2x14 segments)
Display of unit on the secondary display unit (2x14 segments)
Identifies the reminder of the display zone connection
(
∗) When voltages exceeding 60 VDC or 25 VAC are measured, the symbol flashes on the display unit.
Page 13
Description of the instruments
6,000- and 60,000-count digital multimeters 13
Description of the instruments (continued)
Switch
Orange LEDs around the highly reliable virtual switch indicate the measurement
function chosen. The keys of the switch have priority over the action of the keys
of the keypad. The change from one function to another resets the configuration
of the measurement mode.
MTX 3290
Keys of the switch
Short press Successive short presses
Current measurement
Temperature measurement
Selection of the type of probe:
Pt100, Pt1000
Capacitance measurement
Low-impedance AC voltage
measurement (VLowZ)
Current measurement using a
current clamp
Selection of the transformation ratios
1, 10, 100, 1,000mV/A
Resistance measurement,
audible continuity
measurement, diode test
Selection of the continuity, diode
functions
Frequency measurement
Voltage measurement
Page 14
Description of the instruments
14 6,000- and 60,000-count digital multimeters
Description of the instruments (continued)
MTX 3291
Keys of the switch
Short press Successive short presses
Current measurement
Temperature measurement
Selection of the type of probe:
Pt100, Pt1000
Capacitance measurement
Low-impedance AC voltage
measurement (VLowZ)
Current measurement using a
current clamp
Selection of the transformation ratios
1, 10, 100, 1,000mV/A
Resistance measurement,
audible continuity
measurement, diode test
Selection of the continuity, diode
functions
Frequency measurement
Selection of the functions:
- Positive duty cycle
- Negative duty cycle
- Positive pulse width
- Negative pulse width
Voltage measurement
Selection of the functions:
dBm, W
Page 15
Description of the instruments
6,000- and 60,000-count digital multimeters 15
Description of the instruments (continued)
Keypad
The keypad has the following function keys:
The keys are taken into account and applied when pressed. If the key press is
validated, the instrument beeps.
Two types of action are possible:
• Short press Æ press lasting <2 seconds, validated by a beep as
soon as the key press is detected.
• Long press Æ press lasting >2 seconds, validated by a beep as soon as
the key press is detected.
Function keys
Successive short presses Long press
Activation/deactivation of storage of
the measurements and of the
quantities at a given time:
- Hold of the display without stopping
the acquisitions. The bargraph
continues to operate normally.
- Exit from the HOLD mode
In the MAX/MIN/AVG PEAK mode,
when the HOLD is active, the blinking
of the "MAX MIN AVG PEAK" symbol
indicates that acquisition continues as
a background task.
- Hold of the display after
stabilization of the
measurement (Auto
HOLD)
- Exit from the
Auto HOLD mode
Choice of coupling AC, DC, AC+DC:
- Access to various parameters
ÆIn dBm: change of impedance 50,
75, 90, 600 (MTX 3291 only)
ÆIn temperature: the main display
unit indicates the temperature in °C,
the other in °F
ÆIn the REL mode, the key is used
to change from (present value –
reference value) to
Present value – reference value
Reference value
The value is displayed in %.
(MTX 3291 only)
Activation/deactivation of
auto power off (APO)
(MTX 3291 only)
Activation/deactivation of the low-pass
filter 300Hz:
The low-pass filter (4th order) makes
it possible to measure the RMS
voltage delivered by an MLI type
speed controller (for asynchronous
motor).
See curve
, p. 49 and 60.
Activation/deactivation of
the key-press beep
MTX 3290
MTX 3291
x100
Page 16
Description of the instruments
16 6,000- and 60,000-count digital multimeters
Description of the instruments (continued)
Manual selection of measurement
range: the range defines the maximum
measurement range the instrument can
cover.
The Auto Range mode is default.
Used to return to Auto
Range mode.
(∗)
(∗) see example
p. 22.
Activation of the Peak+ Peak-
measurements:
- Peak+: displays the maximum
instantaneous peak value of the
measurement.
- Peak-: displays the minimum
instantaneous peak value of the
measurement.
- 1
st
press: recording of PEAK+, PEAK(on the 2nd display unit).
The PEAK+ value is displayed as
default.
- Subsequent presses: look-up of stored
values (volatile).
Exit from the Peak mode
(∗)
(∗) see example
p. 19.
Activation of the MAX, MIN, AVG
measurements:
- Display and storage of the reference
values and differential values
(difference between the measured
value and the reference value) in the
unit of the quantity measured.
- AVG: displays the mean value of the
signal since the key press
Time-stamped value for the min and the
max [temporary display (4s) on the
main display unit, followed by return to
present value]
If the time (h:min:sec) exceeds
(9:59:59), is displayed ----.
(MTX 3291 only)
- 1
st
press: recording of the MAX, MIN,
AVG (on the 2nd display unit).
The max. value is displayed by
default.
- Subsequent presses: look-up of the
stored values (volatile).
Exit from the
MAX, MIN, AVG mode
(∗)
(∗) see example
p. 23.
Activation of the relative display mode:
- Display and storage of the reference
and differential values in the unit of
the quantity measured.
- 1
st
press: activates the relative mode
REL
(present value – reference value)
and stores the measured value that
will be used as reference.
- "REF" indicates the storage of the
reference.
- Subsequent presses: toggles the
display between the measured value
and the relative measurement REL.
Exit from the ∆REL mode
Page 17
Description of the instruments
6,000- and 60,000-count digital multimeters 17
Description of the instruments (continued)
Activation of the Backlight:
- successive presses to increase the
brightness
- circular operation: brightness 1 Æ
brightness 2 Æ brightness 3
Æ brightness 1
Deactivation of the
Backlight
Activation/Deactivation of the zero
centre bargraph:
MTX 3290 only
Activation/Deactivation of auto power
off:
MTX 3290 only
* Remark 1
- The 0 centre bargraph is managed automatically in IDC and VDC (MTX 3291
only).
When the multimeter is switched on:
- 1st press on
(sustained press)+press on ON/OFF Æ display of all
segments of the display unit.
- 2
nd
press Æ display of model and version (US/Europe)
- 3
rd
press Æ software version (display unit 1) and keyboard and display unit
board versions (display unit 2)
- 4
th
press Æ normal operation. An audible beep acknowledges key presses.
* Remark 2
USER/BASIC mode: During power up, the device is in BASIC mode (default
configuration Volt AC+DC).
• If, when you power up your multimeter
, you want to activate the USER
mode to recover the configuration when the multimeter was switched off,
press the
key, hold it down, then press ON/OFF ( ).
• After an automatic power down, the device restarts in USER mode.
The main display unit indicates, for 3s, the change to USER or BASIC mode.
* In the Volt and Ampere functions, the multimeter starts up in AC+DC, as
in the USER mode.
Connection
in Volt
and other functions
in Ampere
Page 18
Getting started
18 6,000- and 60,000-count digital multimeters
Getting started
Preparation for use
Instructions before
starting up
When you use this multimeter, you must observe the usual safety rules,
which:
• protect you from electrical hazards,
• protect the multimeter from operator errors.
For your safety, use only the leads and accessories (clamp meter, etc.)
supplied with the instrument. Before each use, make sure that they are in
perfect condition.
Power supply The devices operate with:
• 4 1.5V alkaline batteries (LR6-AM3-AA) or
• 4 1.2V NI-MH rechargeable batteries of the same type.
The rechargeable batteries cannot be recharged in the multimeter.
Powering up,
down
Press ON/OFF
to power up the device.
* Reminder: after replacing the batteries, wait 10s before powering
the device back up.
If the multimeter malfunctions, a long press (>2s) on this key can
be applied to power down the instrument and then restore normal
operation.
Power-up
configuration
In the BASIC mode, as default, the
device starts up in its elementary
configuration (default values) and in
the V
Ac+DC function.
MTX 3291 only: in the USER mode,
the device restarts in the
configuration and function selected
when it was powered down.
In the Volt and Ampere functions, the instrument restarts in AC+DC.
Automatic power
down
The multimeter automatically switches itself off after 30 minutes if there has
been no action on the front panel of the multimeter.
Auto power off is disabled:
• in the MAX, MIN, AVG, PEAK mode and in communication
• when the measured quantity (voltage, current) on the input exceeds
the danger thresholds, for the user's safety.
Page 19
Functional description
6,000- and 60,000-count digital multimeters 19
Functional description
1. MAX MIN AVG mode A beep indicates an overshoot or a change of quantity.
#
Displays in the
V
AC+DC function
Main display
unit
Secondary display
unit
Measured signal: 230V, 50Hz:
Present value of the signal
Frequency of the signal
for the MAX value:
1
st
press on :
Present value of the signal
MAX value
The measured signal changes to 250V,
50Hz:
Momentary screen (4s) indicating the
time-stamped max. value, if the value
changes or if the value is looked up.
h: min: sec
# Ex.: 27s
MAX value
* The examples described in this chapter use an
Page 20
Functional description
20 6,000- and 60,000-count digital multimeters
Functional description (continued)
The display then becomes:
Present value of the signal
MAX value
for the MIN value:
2
nd
press :
# Ex.: 3s
Momentary screen (4s) indicating the
time-stamped max. value, if the value
changes or if the value is looked up.
h: min: sec
MIN value
The display then becomes:
Present value of the signal
MIN value
Page 21
Functional description
6,000- and 60,000-count digital multimeters 21
Functional description (continued)
for the AVG value:
3
rd
press on :
Present value of the signal
AVG value
De-activation
By a long press on the key.
Page 22
Functional description
22 6,000- and 60,000-count digital multimeters
Functional description (continued)
2. PEAK mode A beep indicates an overshoot or a change of quantity.
#
Displays in the
V
AC+DC function
Measured signal: 250V, 50Hz:
Present value of the signal
MIN value
for the Peak+ value:
First press on :
Present value of the signal
Peak+ value
for the Peak- value:
Second press on :
Present value of the signal
Peak- value
De-activation
By a long press on the key.
Page 23
Functional description
6,000- and 60,000-count digital multimeters 23
Functional description (continued)
3. ∆REL mode
#
Displays in the
V
AC+DC function
Measured signal: 1V, 100Hz:
Present value of the signal
Frequency of the signal
Activation of the
Δ
REL mode by
Short press on the key:
REL=(present value - reference value)
Reference value
The measured signal changes to1.5V:
(REL=1.5V- 1V=0.5V)
REL=(present value – reference value)
Reference value
Page 24
Functional description
24 6,000- and 60,000-count digital multimeters
Functional description (continued)
Short press, in the REL mode, on
:
Present value – reference value
Reference value
Reference value
A long press on the key
erases the reference value.
De-activation
By a long press on the key.
x100
REL (%) =
Page 25
Functional description
6,000- and 60,000-count digital multimeters 25
Functional description (continued)
4. "Clamp" function
# Ex.: 10mV/A
Present value of the signal
Transformation ratio, selected by
successive presses on
:
- press 1: 1mV/A
- press 2: 10mV/A
- press 3: 100mV/A
- press 4: 1,000mV/A
Page 26
Functional description
26 6,000- and 60,000-count digital multimeters
Functional description (continued)
Serial operation of
the keys of the
switch
MTX 3290
Press 1 Press 2 Press 3 Press 4 Press 5
Short
press
V V V V V …3
I I I I I …3
Pt100 Pt1000 Pt100 Pt1000 Pt100 …3
Capa Capa Capa Capa Capa …3
VLowZ VLowZ VLowZ VLowZ VlowZ …3
R=1 R=10 R=100 R=1000 R=1 …3
Continuity Diode Continuity …3
Frequency Frequency Frequency Frequency Frequency …3
MTX 3291
Press 1 Press 2 Press 3 Press 4 Press 5 Press 6
Short
press
V dBm W V dBm W …3
I I I I I I …3
Pt100 Pt1000 Pt100 Pt1000 Pt100 Pt1000 …3
Capa Capa Capa Capa Capa Capa …3
VLowZ VLowZ VLowZ VLowZ VLowZ VLowZ …3
R=1 R=10 R=100 R=1000 R=1 R=10 …3
Continuity Diode Continuity Diode …3
Frequency
- Pos. duty
cycle
- Neg. duty
cycle
- Width of
pos. pulse
- Width of
neg. pulse
Frequency …3
Page 27
Functional description
6,000- and 60,000-count digital multimeters 27
Functional description (continued)
Functions
of the switch
and keys
To access the
, , ,
,
,
,
, ,dBm,
W, continuity, diode, duty cycle, and pulse duration functions, press the button
of the switch corresponding to the chosen function.
Here are the possible combinations according to the type of measurement:
Type of measurement
MAX/MIN/
AVG
PEAK ±
ΔREL
RANGE
HOLD
Auto. Manu.
Voltage VLowZ
Voltage V
AC
Voltage V
AC+DC
Current A
AC, AAC+DC
9 9 9
in ΔREL
only
9
9 9 9
Voltage VDC
Current A
DC
9
-
9 9 9
9 9
-
Voltage 60mVDC
9
-
9 9
-
9 9
-
Voltage 60mVAC
Voltage 60mV
AC+DC
9 9 9
in ΔREL
only
-
9 9 9
Temperature
9
-
9
-
9
9 9
-
Ohmmeter
9
-
9
in ΔREL
only
9
9 9
-
Capacitance
9
-
9 9 9 9
-
Frequency
9
-
9 9
-
9 9
Period (1/F)
9
-
9
-
9
-
9 9
Continuity
- -
- -
9
- - -
Diode
- -
- -
9
-
9
-
dBm
- -
- -
9
-
9
-
W
- -
- -
9
-
9
-
Duty cycle
(DC+, DC-)
- -
- -
9
-
9
-
Pulse duration
(Pw+, Pw-)
- -
- -
9
-
9
-
Page 28
How are the various quantities measured?
28 6,000- and 60,000-count digital multimeters
How are the various quantities measured?
*
The connections illustrated in this chapter were made with an MTX 3290
multimeter (6,000 points). They would be the same with an MTX 3291 (60,000 pts).
1. Voltage
measurement
:
AC voltage measurement, or measurement of an AC voltage
superposed on a DC voltage, or DC voltage measurement at high
impedance.
:
This position is provided to allow measurements in electrical
installations. The input impedance <1M serves to avoid
measuring "phantom" voltages due to couplings between the lines.
In all cases, “O.L” is displayed above 1050V (MTX 3291) or 620V (MTX 3290)
and a beep sounds when the measurement exceeds 1000V (MTX 3291) or
600V (MTX 3290).
1. Press:
or .
2. Select AC+DC, AC or DC coupling of the signal by pressing
(the default coupling is AC+DC).
Depending on what you select, the screen displays DC, AC or AC+DC.
3. Connect the black lead to the “COM” terminal and the red lead to “V”.
* If the connection is not correct, an audible beep and a visible signal
(LEADS) are activated.
4. Place the test probes on the terminals of the circuit to be measured:
5. Read the measurement value indicated on the display unit.
6. As default, the 2
nd
display unit indicates the frequency, except in DC.
* It is possible to activate the filter in VLowZ, VAC+DC, VAC. The cutoff
frequency of the filter is ≤300Hz.
When a voltage having a frequency above 150Hz is measured, it is
heavily attenuated, and so a large error may be observed. It is
necessary in this case to deactivate the filter to have the full passband.
Page 29
How are the various quantities measured?
6,000- and 60,000-count digital multimeters 29
How are the various quantities measured? (continued)
2. Current
measurement
as an ammeter
1. Press:
.
2. Select the type of signal, AC+DC, AC, or DC, by pressing
. Depending
on what you select, the screen displays AC, DC, or AC+DC.
3. Connect the black lead to the “COM” terminal and the red lead to “A”.
* If the connection is not correct, an audible beep and a visible signal
(LEADS) are activated.
4. Place the test probes in series between the source and the load:
5. Read the measurement value indicated on the display unit.
“O.L” is displayed, if I >20A.
6. As default, the 2
nd
display unit indicates the frequency, except in DC.
* It is possible to activate the filter in AAC+DC, AAC. The cutoff
frequency of the filter is ≤300Hz.
When a voltage having a frequency above 150Hz is measured, it is
heavily attenuated, and so a large error may be observed. It is
necessary in this case to deactivate the filter to have the full passband.
Page 30
How are the various quantities measured?
30 6,000- and 60,000-count digital multimeters
How are the various quantities measured? (continued)
with a current
clamp
1. Press: .
2. Select the type of signal, AC+DC, AC, or DC, by pressing
.
Depending on what you select, the screen displays AC, DC, or AC+DC.
3. Connect the black lead of the clamp to the "COM" terminal and the red lead of
the clamp to "V".
4. Select the transformation ratio (the same as that of the clamp) - 1mV/A,
10mV/A, 100mV/A, or 1000mV/A - by pressing on "clamp" (
) to have a
direct reading of the current.
5. Place the clamp around the conductor:
7. Read the measurement value indicated on the display unit. The
measurement accuracy is indicated in "Technical characteristics",
§. "Clamp" p. 46.
8. As default, the 2
nd
display unit indicates the transformation ratio in mV/A.
* It is possible to activate the filter in AAC+DC, AAC. The cutoff
frequency of the filter is ≤300Hz.
When a voltage having a frequency above 150Hz is measured, it is
heavily attenuated, and so a large error may be observed. It is
necessary in this case to deactivate the filter to have the full passband.
Clamp, V
Page 31
How are the various quantities measured?
6,000- and 60,000-count digital multimeters 31
How are the various quantities measured? (continued)
3. Frequency
measurement
1. Press:
.
2. Connect the black lead to the “COM” terminal and the red lead to “V”.
3. Place the test probes on the terminals of the circuit to be measured.
* Connect the instrument as for a resistance measurement.
4. Read the measurement value indicated on the display unit. The second
display unit indicates the period of the signal, 1/F.
5. Press
several times to obtain (MTX 3291 only):
• positive duty cycle (DC+)
• negative duty cycle (DC-)
• positive pulse duration (Pw+)
• negative pulse duration (Pw-)
* It is possible to activate the filter in AAC+DC, AAC. The cutoff
frequency of the filter is ≤300Hz.
4. Resistance
measurement
1. Press the
button of the switch.
2. Connect the black lead to the “COM” terminal and the red lead to “V”.
3. Place the test probes on the terminals of the component.
* Resistance measurements must be made with power off. However,
while the presence of a voltage will prevent or throw off the
measurement, it will not damage the instrument.
4. Read the measurement value indicated on the display unit.
5. “O.L” is displayed, if the circuit is open.
Page 32
How are the various quantities measured?
32 6,000- and 60,000-count digital multimeters
How are the various quantities measured? (continued)
5. Audible
continuity
measurement
1. Press:
.
2. Press
again; the "♪" symbol is displayed.
3. Connect the black lead to the “COM” terminal and the red lead to «V».
4. Place the test probes on the terminals of the circuit to be measured.
* Connect the instrument as for a resistance measurement.
5. Read the measurement value indicated on the display unit.
6. The continuity beep sounds when R <30 ±5.
7. “O.L” is displayed, if the circuit is open.
6. Diode test
1. Press:
.
2. Press two times
; the " " symbol is displayed.
3. Connect the black lead to the “COM” terminal and the red lead to “V”.
4. Place the test probes on the terminals of the component:
5. Read the measured threshold voltage of the junction indicated
on the display unit.
If the value is <40mV ±10mV an audible signal is triggered.
6. “O.L” is displayed, if the circuit is open or the threshold of the diode >3V.
Page 33
How are the various quantities measured?
6,000- and 60,000-count digital multimeters 33
How are the various quantities measured? (continued)
7. Capacitance
measurement
1. Press:
.
2. Connect the black lead to the “COM” terminal and the red lead to “V”.
3. Place the test probes on the terminals of the component:
4. Read the measurement value indicated on the display unit.
“O.L” is displayed, if the value to be measured exceeds the capacitance of
the range.
“O.L” is displayed, if the capacitor is short-circuited.
• For high values, the measurement cycle includes the display of "run" with
a "chaser" decimal point. This means that acquisition is in progress; wait
for the display of the digital result.
"Run" is displayed immediately, if the previous measurement
was in a small range.
• The prior discharge of very high capacitances helps shorten the
measurement time.
Page 34
How are the various quantities measured?
34 6,000- and 60,000-count digital multimeters
How are the various quantities measured? (continued)
8. Temperature
measurement
1. Press:
.
2. Press
to select the type of probe: Pt100 or Pt1000
3. Press
to switch the temperature unit (°C or °F) between the two
display units.
* The unit displayed as default on the main display unit is °C.
4. Connect the adapter of the Pt100 or Pt1000 temperature probe (∗) to the
"COM" and "V" terminals, making sure that the polarity is correct:
5. Read the measurement value indicated on the display unit.
If "O.L" is displayed, the probe is open-circuit or short-circuited or the value to be
measured exceeds the range.
* For greater accuracy, avoid exposing the instrument to
sudden changes of temperature.
(∗) You will find a list of accessories in the CHAUVIN-ARNOUX catalogue.
sensor
Page 35
How are the various quantities measured?
6,000- and 60,000-count digital multimeters 35
How are the various quantities measured? (continued)
9. Measurement on an
MLI type speed
variator
Voltage
measurement
1. Press:
.
2. Select the type of signal, AC+DC, AC, or DC, by pressing
.
Depending on what you select, the screen displays AC, DC, or AC+DC.
3. Select the filter by pressing
.
4. Connect the black lead to the “COM” terminal and the red lead to “V”.
5. Place the test probes between two phases of the circuit to be measured:
6. Read the measurement values indicated on the display unit (voltage and
frequency):
In all cases, “O.L” is displayed above 1050V (MTX 3291) or 620V (MTX 3290)
and a beep sounds when the measurement exceeds 1000V (MTX 3291) or
600V (MTX 3290).
The presence of the symbol indicates that the 300Hz filter is active.
* It is very important to leave the filter activated to measure the voltage
and frequency of the signal without being perturbed by the MLI.
Page 36
How are the various quantities measured?
36 6,000- and 60,000-count digital multimeters
How are the various quantities measured? (continued)
Current
measurement
1. Press: .
2. Select the type of signal, AC+DC, AC, or DC, by pressing
.
Depending on what you select, the screen displays AC, DC, or AC+DC.
3. Select the filter by pressing
.
4. Connect the black lead to the “COM” terminal and the red lead to “A”.
5. Place the test probes in series between the source and the load:
6. Read the measurement value indicated on the display unit.
“O.L” is displayed, if I >20A.
The presence of the symbol indicates that the filter is active.
* It is very important to leave the filter activated to measure the voltage
and frequency of the signal without being perturbed by the MLI.
7. As default, the 2nd display unit indicates the frequency, except in DC.
* It is possible to make the current measurement using a current clamp
in conjunction with the multimeter (see §. 2. Current measurement
)
Page 37
How are the various quantities measured?
6,000- and 60,000-count digital multimeters 37
How are the various quantities measured? (continued)
10. Resistive power
(MTX 3291, only)
1. Press:
.
2. Press
again.
3. Select AC+DC, AC or DC coupling of the signal by pressing
(the default coupling is AC+DC).
Depending on what you select, the screen displays DC, AC or AC+DC.
4. Connect the black lead to the “COM” terminal and the red lead to “V”.
5. Place the test probes on the terminals of the circuit to be measured.
to measure the
resistance
• Press . The display unit indicates the resistance.
• Press to store the resistance, which will be used to calculate
the power.
6. Read the measurement value indicated on the display unit:
- the main display unit indicates the power in W (U
2
/R)
- the secondary display unit indicates the resistance measured on the
installation (600 Ohm by default).
Page 38
How are the various quantities measured?
38 6,000- and 60,000-count digital multimeters
How are the various quantities measured? (continued)
11. dBm decibels in
power (MTX3291,
only)
1. Press:
.
2. Press
again.
3. Press
to select the reference resistance, 50, 75, 90, or 600 Ohm.
4. Connect the black lead to the “COM” terminal and the red lead to “V”.
5. Place the test probes on the terminals of the circuit to be measured.
* Connect the instrument as for a voltage measurement.
6. Read the measurement value indicated on the display unit:
- the main display unit indicates the value in dBm
- the secondary display unit indicates the resistance measured on the
installation(50 Ω, by default).
Reminder
R 0dBm (VRef) en
50 Ω
223.6mV
75 Ω
273.86mV
90 Ω
300mV
600 Ω
774.6mV
XdBm =
Vmeasured
20 Log
VRef
Page 39
SX-DMM software
6,000- and 60,000-count digital multimeters 39
SX-DMM software
SX-DMM: Processing
software
These multimeters can be interfaced directly with a PC or other computer using
"SX-DMM" acquisition software:
The transmission rate is 9600 Bauds.
The transmission parameters are fixed (8 data bits, 1 stop bit, no parity).
Connection of the
isolated USB optical
lead supplied
1. Connect the isolated optical lead to the isolated optical input of the
multimeter (on the side of the multimeter). Mechanical polarization prevents
connection in reverse.
Connect the USB lead to one of the USB ports of the PC.
2.
Install the USB driver on your PC (see the data sheet on the CD provided).
Installing
the "SX-DMM"
software
1. Install the "SX-DMM" software on the PC using the CD.
2. Start the software for data acquisition and study the various display
possibilities (curves, tables, etc.).
* The symbol appears on the display unit when the instrument is
controlled from the PC (REMOTE mode).
For more information, refer to the "Help" menu of the software.
Isolated optical connector
USB
Interface cable
Page 40
Technical characteristics of the MTX 3290
40 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3290
Accuracy:
“n% L+n D” means
“n% of the reading
+ n Digit”
(see CEI 485)
Only values with tolerances or limits are guaranteed values.
Values without tolerances are given for guidance (standard NFC42670).
The technical specifications are guaranteed only after 30 minutes of warming up.
Except as otherwise indicated, they are valid from 10% to 100% of the measurement
range.
DC voltage In the "DC" mode, you measure a direct voltage or the DC component of an AC
voltage (filter activated).
Range
Specified
measurement range
Resolution
Intrinsic error Input impedance
600mV 0 to 600.0mV 0.1mV 0.6% L+2D 10.9M
6V 0 to 6.000V 0.001V
0.3% L+2D
10.9M
60V 0 to 60.00V 0.01V 10.082M
600V (∗)
0 to 600.0V 0.1V 10.008M
(∗) The display indicates "+OL" above +620V and "-OL" above - 620V. Protection:
850Vpk
Secondary measurements and displays: MAX, MIN, AVG
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 Protection: 850Vpk
Range
Operating
range
Specified
easurement
range 3)
Resolution
Uncertainty
(±)
Additional
uncertainty F
(Hz) 1)
Pass
band
@ 1kHz
Input
impedance
// <50 pF
Peak
factor
600mV
0 to
600.0mV
60.0 to
600.0mV
0.1mV
2% L+
0.25%x
[F(kHz)-1]L
±5D
45<F<65Hz
0.3% L
typ.
at 100Hz
0 .7% L
typ.
at 150Hz
1.8% L
typ.
at 300Hz
30% L
typ.
10Hz to
20kHz
10.9 M
3 to
500mV
6V
0 to
6.000V
0.600 to
6.000V
0.001V
2% L+
0.18%x
[F(kHz)-1]L
±3D
10Hz to
20kHz
10.9 M
3 to 5V
60V
0 to
60.00V
6.00 to
60.00V
0.01V 10.082 M
3 to 50V
600V 2)
0 to
600.0V
60.0 to
600.0V
0.1V 10.008 M
3 to
500V
1) See the typical curve of the 300Hz filter.
2) The LCD indicates "+OL" above +620V, "-OL" below -620V or above 620VRMS.
3) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG,
PEAK
Page 41
Technical characteristics of the MTX 3290
6,000- and 60,000-count digital multimeters 41
Technical characteristics of the MTX 3290 (continued)
VAC+DC TRMS Protection: 850Vpk
Range
Operating
range
Specified
measure.
range 3)
Resolution
Uncertainty
DC (±)
Uncertainty
AC (±)
Additional
uncertainty
F (Hz) 1)
Pass
band
Input
impedance
// <50 pF
Peak
factor
600mV
0 to
600.0mV
60.0 to
600.0mV
0.1mV
0.8% L
±10D
2% L
+ 0.18%x
[F(kHz)-1]L
±5D
45<F<65Hz
0.3% L
typ.
at 100Hz
0 .7% L
typ.
at 150Hz
1.8% L
typ.
at 300Hz
30% L
typ.
10Hz
to
20kHz
10.9M
3 to
500mV
6V
0 to
6.000V
0.600 to
6.000V
0.001V
2% L
+ 0.18%x
[F(kHz)-1]L
±3D
10Hz
to
20kHz
10.9M
3 to
5V
60V
0 to
60.00V
6.00 to
60.00V
0.01V 10.082M
3 to
50V
600V 2)
0 to
600.0V
60.0 to
600.0V
0.1V 10.008M
3 to
500V
1) See the typical curve of the 300Hz filter.
2) The LCD indicates “+OL” above +620V, “-OL” below -620V or above 620VRMS.
3) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling),MAX,MIN,AVG,PEAK
V
LowZ AC Protection: 850Vpk
The pass band is reduced to 300Hz if the filter is activated. The frequency
measurement is made like the measurement in a 300Hz pass band.
Range
Operating
range
Specified
m
easurement
range 3)
Resolution
Uncertainty (±)
Additional
uncertainty F
(Hz) 1)
Input
impedance
//<50 pF
Peak
factor
600mV
0 to
600.0mV
60.0 to
600.0mV
0.1mV
2 .2% L+
0.25%x
[F(kHz)-1]L
±5D
45<F<65Hz
0.3% L typ.
at 100Hz
0.7% L typ.
at 150Hz
1.8% L typ.
at 300Hz
30% L typ.
≅300k
3 to
500mV
6V 0 to 6.000V
0.600 to
6.000V
0.001V
2 .2% L+
0.18%x
[F(kHz)-1]L
±3D
3 to 5V
60V 0 to 60.00V
6.00 to
60.00V
0.01V
3 to 50V
600V 2) 0 to 600.0V
60.0 to
600.0V
0.1V 3 to 500V
1) See the typical curve of the 300Hz filter.
2) The LCD indicates “+OL” above +620V, “-OL” below -620V or above 620VRMS.
3) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG,PEAK
Page 42
Technical characteristics of the MTX 3290
42 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3290 (continued)
Currents
Three possible modes: DC, AC, AC+DC
In DC mode, you can measure a direct current or the DC component of an
alternating current.
In the AC and AC+DC modes, you can measure the true RMS (TRMS) value of
an alternating current with/without its direct component (no capacitive coupling in
"DC" mode).
DC current
Particular reference conditions
:
6mA range
: Measuring a strong current for a long time can cause a temperature
rise in some components. In this case, it is necessary to wait some time for the
metrological characteristics specified in 6mA to be restored.
Range
Operating
range
Specified
measurement
range
Resolution
Uncertainty
(±)
Voltage
drop
Protection
6mA 0 to 6.000mA 0.002 to
6.000mA
1µA 1.2% L ± 5D
25mV/mA
Fuse
10A/600V
>50kA
60mA 0 to 60.00mA
.02 to 60.00mA 0.01mA 1.2% L ± 2D 3mV/mA
600mA 0 to 600.0mA 0.2 to 600.0mA 0.1mA 1.2% L ± 2D 0.58mV/mA
6A 0 to 6.000A 0.200 to 6.000A 0.001A 1.2% L ± 3D 0.05V/A
10 A/20A
(∗)
0 to 20.00A 0.20 to 20.00A 0.01A 1.2% L ± 2D
0.05V/A
The display indicates "OL" above 19.99A. The symbol blinks and a beep
sounds above 10A.
(∗) Acceptable overload: 10A to 15A for 30s max. with a pause of 5min between
2 measurements. Ambient temp. 35°C max.
Secondary measurements and displays: MAX, MIN, AVG
AAC RMS current
Range
Operating
range
Specified
easuremen
t
range
Resolution
Uncertainty (±)
40Hz to 20kHz
(**)
Peak factor
Voltage
drop
Protection
6mA
0 to
6.000mA
0.600 to
6.000mA
1µA 1.7% L ± 5D
2.6 to
5mA
25mV/mA
Fuse
10A/600V
>50kA
60mA
0 to
60.00mA
6.00 to
60.00mA
0.01mA
1.5% L ± 3D
2.6 to
50mA
3mV/mA
600mA
0 to
600.0mA
60.0 to
600.0mA
0.1mA
2.6 to
500mA
0.58mV/mA
6A
0 to
6.000A
0.600 to
6.000A
0.001A 1.7% L ± 5D 2.8 to 5A 0.05V/mA
10A/20A
(∗)
0 to
20.00A
1.00 to
10.00A
0.01A 1.5% L ± 3D 3.7 to 8A 0.05V/mA
The display indicates "OL" above 19.99A. The symbol blinks and a beep
sounds above 10A.
Secondary measurements and displays: FREQ (AC coupling) MAX, MIN, AVG,
PEAK
(∗) Acceptable overload: 10A to 15A for 30s max. with a pause of 5min between 2
measurements. Ambient temp. 35°C max.
(∗∗) Additional uncertainty with the 300Hz filter.
Page 43
Technical characteristics of the MTX 3290
6,000- and 60,000-count digital multimeters 43
Technical characteristics of the MTX 3290 (continued)
AAC+DC TRMS current Warning: The sum AC+DC must never exceed the range, 600mA, or
60mA, or 6mA, or 6A, or 10A, as the case may be.
Range
Operating
range
Specified
measure-
ment range
esolution
Uncertainty AC
40Hz at 20kHz
(±) (∗∗)
Additional
uncertainty
DC (±)
Peak
factor
Voltage
drop
Protection
6mA
0 to
6.000mA
0.060 to
6.000mA
1µA
1.7% L +[0.08%x
(FkHz-1)] L
±5D
±15D
2.6 to
5mA
25mV/mA
Fuse
10A/600V
>50kA
60mA
0 to
60.00mA
6.00 to
60.00mA
0.01mA
1.5% L +[0.08%x
(FkHz-1)] L
±3D
±13D
2.6 to
50mA
3mV/mA
600mA
0 to
600.0mA
60.0 to
600.0mA
0.1mA
2.6 to
500mA
0.58mV/mA
6A
0 to
6.000A
0.600A to
6.000A
0.001A
1.7% L+[0.08%x
(FkHz-1)] L
±5D
±10D 2.8 to 5A 0.05V/mA
10A
/20A*
0 to
20.00A
0.60A to
20.00A
0.01A
1.5% L+ [0.08%x
(FkHz-1)] L
±3D
±10D 3.7 to 8A 0.05V/mA
The display indicates “OL” above 19.99A. The symbol blinks and a beep
sounds above 10A.
(*) Acceptable overload: 10A to 15A for 30s max. with a pause of 5min between 2
measurements. Ambient temp. 35°C max.
Secondary measurements and displays: F (AC coupling), MAX, MIN, AVG, PEAK
(**) Additional uncertainty with the 300Hz filter.
Page 44
Technical characteristics of the MTX 3290
44 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3290 (continued)
Frequency
Main frequency
measurement
In this setting, you can measure the frequency of a voltage.
Particular reference conditions
: 150mV <U <600V
When the switch is set to Hz, the 300Hz filter is not in service.
Protection: 850Vpk
Range Operating range
Specified
measurement
range
Resolution Intrinsic error
60Hz 10.00 to 60.00Hz 10.00 to 60.00Hz 0.01Hz
0.1% L ±1D
600Hz 10.0 to 600.0Hz 10.00 to 600.0Hz 0.1Hz
6kHz 0 to 6.000kHz 0.010 to 6.000kHz 0.001kHz
60kHz 0 to 60.00kHz 0.01 to 60.00kHz 0.01kHz
600kHz 0 to 200.0kHz 0.1 to 200.00kHz 0.1kHz
Below 10Hz, or if the signal detection level is inadequate, the reading is forced to
zero.
* The measured period in ms is available on the second display unit.
Secondary
frequency
measurement
You can measure the frequency and magnitude of a voltage or of a current
simultaneously.
Same accuracy as in the "Hz" setting
Particular reference conditions
: 150mV <U <600V
0.15A <I <10A
Max. frequency measurable in volts: 20kHz
Max. frequency measurable in amperes: 20kHz
When the switch is set to VLowZ, Volts or Ampere, if the 300Hz filter is activated,
the measurable frequency remains within the limits of the PB of the filter.
Below 10Hz, or if the signal detection level is inadequate, the reading is forced to
“-----“.
Page 45
Technical characteristics of the MTX 3290
6,000- and 60,000-count digital multimeters 45
Technical characteristics of the MTX 3290 (continued)
Resistance
Ohmmeter In this setting, the user can measure a resistance.
Particular reference conditions
:
The (+COM) input must not have been overloaded following the accidental
application of a voltage to the input terminals with the switch set to or T°.
If this happens, the return to normal may take about ten minutes.
Protection: 850Vpk
Range
Specified
measurement
range
Resolution Uncertainty
Measurement
current
Open-circuit
voltage
600
0 to 600.0 ∗
0.1 0.5% L ±2D 850µA
<5V
6k 0 to 6.000k 0.001k
0.5% L ±2D
126.6A
60k 0 to 60.00k 0.01k 12.6A
600k 0 to 600.0k 0.1k 1.26A
6M 0 to 6.000M 0.001M 1.5% L ±3D 240nA
60MΩ
0 to 60.00M
0.01M 3% L ±3D 29nA
(∗) REL measurements
Capacitance
Capacitance
meter
In this setting, the user can measure the capacitance of a capacitor.
Range
Operating
range
Specified
measurement
range
Resolution
Intrinsic
error
Measurement
current
Measurement
time
6nF
0.100 to
6.000nF
0.100 to
6.000nF
0.001nF 2.5% L ±30D 1.26µA 400ms
60nF 0 to 60.00nF 0 to 60.00nF 0.01nF 1.5% L ±8D 1.26µA 400ms
600nF 0 to 600.0nF 0 to 600.0nF 0.1nF 1.5% L ±5D 1.26µA 400ms
6µF 0 to 6.000µF 0 to 6.000µF 0.001µF 1.5% L ±5D 12.6µA 0.125 s/µF
60µF 0 to 60.00µF 0 to 60.00µF 0.01µF 1.5% L ±5D 126.6µA 0.125 s/µF
600µF 0 to 600.0µF 0 to 600.0µF 0.1µF 3.5% L ±5D 850µa 0.125 s/µF
6mF 0 to 6.000mF 0 to 6.000mF 1µF 4.5% L ±5D 850µa 17 s/mF
60mF 0 to 60.00mF 0 to 60.00mF 10µF 6.5% L ±5D 850µa 17 s/mF
The use of wires that are very short and shielded is strongly recommended.
Protection: 850Vpk
Page 46
Technical characteristics of the MTX 3290
46 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3290 (continued)
Diode Test
Range Resolution Accuracy Open-circuit voltage
Measurement
current
3V 1mV 2% L ±3D <5V <1.1mA
Audible signal triggered if <40mV ±10mV
Protection: 850Vpk
Audible continuity
Range Resolution Accuracy
Open-circuit
voltage
Measurement
current
Protection
600 0.1 0.5% L ±3D <5V <1.1mA 850Vpk
Response time <100ms
Triggering threshold: <30 ±5
Protection: 850Vpk
Clamp
You can measure a current using various current clamps and obtain a direct
reading of the current by selecting the correct transformation ratio, which must be
the same as that of the clamp.
If the signal detection level is insufficient, the value is forced to "-----"
The input impedance is approximately 10M.
* Add the error of the clamp to the intrinsic error of the multimeter, specified
in the tables below.
DC current
Range
Ratio
600mA 6A 60A 600A 6000A
1mV/A
Resolution
0.01A 0.1A 1A
Accuracy 0.6%L ±2D 0.6%L ±2D 0.3%L ±2D
10mV/A
Resolution
0.001A 0.01A 0.1A
Accuracy 0.6%L ±2D 0.6%L ±2D 0.3%L ±2D
100mV/A
Resolution 0.1mA 0.001A 0.01A
Accuracy 0.6%L ±2D 0.6%L ±2D 0.3%L ±2D
1000mV/A
Resolution 0.1mA 0.001A
Accuracy 0.6%L ±2D 0.3%L ±2D
Secondary measurements and displays: MAX, MIN, AVG and transformation ratio of
the sensor
AAC RMS current
Range
Ratio
600mA 6A 60A 600A 6000A
1mV/A
Resolution
0.01A 0.1A 1A
Accuracy
2% L ±5D (∗)
2% L ±5D 2% L ±3D
10mV/A
Resolution
0.001A 0.01A 0.1A
Accuracy
2% L ±5D (∗)
2% L ±5D 2% L ±3D
100mV/A
Resolution 0.1mA 0.001A 0.01A
Accuracy
2% L ±5D (∗)
2% L ±5D 2% L ±3D
1000mV/A
Resolution 0.1mA 0.001A
Accuracy 2% L ±5D 2% L ±3D
Peak factor 3 to 500mA 3 to 5A 3 to 50A 3 to 500A 3 to 5000A
Secondary measurements and displays: MAX, MIN, AVG and transformation ratio
of the sensor
300Hz filter: if the filter is active, see "300Hz filter" curve for the additional
uncertainty. (∗) : see "Frequency response" curve, p. 47.
Page 47
Technical characteristics of the MTX 3290
6,000- and 60,000-count digital multimeters 47
Technical characteristics of the MTX 3290 (continued)
AAC+DC TRMS current
Range
Ratio
600mA 6A 60A 600A 6000A
1mV/A
Resolution
0.01A 0.1A 1A
Accuracy
2.8% L ±15D
(∗)
2.8% L ±15D 2.8% L ±13D
10mV/A
Resolution
0.001A 0.01A 0.1A
Accuracy
2.8% L ±15D
(∗)
2.8% L ±15D 2.8% L ±13D
100mV/A
Resolution 0.1mA 0.001A 0.01A
Accuracy
2.8% L ±15D
(∗)
2.8% L ±15D 2.8% L ±13D
1000mV/A
Resolution 0.1mA 0.001A
Accuracy
2.8% L ±15D 2.8% L ±13D
Peak factor 3 to 500mA 3 to 5A 3 to 50A 3 to 500A 3 to 5000A
Secondary measurements and displays: MAX, MIN, AVG and transformation ratio
of the sensor
300Hz filter: if the filter is active, see “300Hz filter” curve for the additional
uncertainty.
(∗): see “Frequency response” curve, below.
Frequency
response
Page 48
Technical characteristics of the MTX 3290
48 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3290 (continued)
Temperature
Pt100/Pt1000
The user can measure the temperature by means of a Pt100/Pt1000 sensor.
Range Measurement current Resolution Accuracy Protection
- 125°C to
+ 75°C
<1mA (Pt100)
<0.1mA (Pt1000)
0.1°C
---
± 0.5°C
850Vpk
- 200°C to
+ 800°C
<1mA (Pt100)
<0.1mA (Pt1000)
0.1°C
---
0.1% L ± 1°C
0.07% L ± 1°C
"Active" protection by PTC thermistor
Display in °C/°F possible
Peak
Add 1% L ± 30 D to obtain the accuracy corresponding to the function and the
range.
Fmax 1kHz (1ms)
Protection 850Vpk
θ=1ms mini
SURV
MIN, MAX, AVG
Add 0.2% L + 2D to obtain the accuracy corresponding to the function and the
range.
Acquisition time of the extrema approximately 100ms.
Protection 850Vpk
Operation
of the audible beep
Beep reporting a valid key
High-pitched
sound
Beep reporting an invalid key
Low-pitched
sound
Successive beeps reporting an overshoot of the danger
threshold (alarm)
High-pitched
sound
Successive beeps reporting recording of the MAX, MIN, PEAK
High-pitched
sound
Successive beeps (alarm) Æ current >10A
High-pitched
sound
Continuity measurement
Mediumpitched sound
T
θ
Page 49
Technical characteristics of the MTX 3290
6,000- and 60,000-count digital multimeters 49
Technical characteristics of the MTX 3290 (continued)
Variation in the
nominal range of use
Quantity of
influence
Range of
influence
Quantity
influenced
Influence
typical MAX
Battery
voltage
4V to 6V all
< 3D
0.2% L+1D
Temperature
-10°C… 18
28 ... 55°C
VDCmV 0.02% L ±0.2D/1°C 0.04% L ±0.25D/1°C
VACmV, V
LowZ
mV 0.08% L ±0.2D/1°C 0.15% L ±0.25D/1°C
VDC 0.01% L ±0.1D/1°C 0.05% L ±0.1D/1°C
VAC, VAC+DC,V
LowZ
0.25% L ±0.1D/1°C
ADC 0.05% L ±0.1D/1°C 0.1% L ±0.1D/1°C
AAC and AAC+DC 0.08% L ±0.1D/1°C 0.12% L ±0.1D/1°C
0.01% L ±0.1D/1°C 0.1% L/1°C
Ω
0.05% L/1°C 0.1% L/1°C
60 MΩ
0.3% L/1°C
µF 0.2% L ±0.1D/1°C
mF 0.6% L ±0.1D/1°C
Hz 0.01% L/1°C
Temperature
± 2°C+0.05% L/1°C
Stabilization time
≈ 2 h
2.5 h
Humidity
(without
condensation)
10% ... 80% RH
V
A
Ω
Hz
0 0
Common mode
600V
50Hz
VAC, VAC+DC, V
LowZ
Range typical
60mV,
600mV
>35dB
6V >60dB
60V,
600V,
1000V
>95dB
Response of the
300Hz filter
-60,00
-50,00
-40,00
-30,00
-20,00
-10,00
0,00
0 50 100 150 200 250 300 350 400 450
Fr
equency (Hz)
Atténuation (%)
Attenuation (%)
Page 50
Technical characteristics of the MTX 3291
50 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3291
Accuracy:
“n%L + nD” means
“n% of the reading
+ n Digit”
(see CEI 485)
Only values with tolerances or limits are guaranteed values.
Values without tolerances are given for guidance (standard NFC42670).
The technical specifications are guaranteed only after 30 minutes of warming up. Except
as otherwise indicated, they are valid from 10% to 100% of the measurement range.
DC voltage
In the “DC” mode, you measure a direct voltage or the DC component of an AC voltage
(filter activated).
60mV range: Measuring a strong current or measuring a current for a long time may
cause a temperature rise of some components.
Protection: 1414 Vpk
Range
Specified
measurement range
Resolution Intrinsic error
Input impedance
60mV 1) 0 to 60.000mV 0.001mV 0.5% L+35D
10.612M
600mV 0 to 600.00mV 0.01mV 0.5% L+25D
10.9M
6V 0 to 6.0000V 0.0001V
0.05% L+25D
10.9M
60V 0 to 60.000V 0.001V
10.082M
600V 0 to 600.00V 0.01V
10.008M
1000V 2) 0 to 1000.0V 0.1V 0.07% L+25D
10.008M
1) This range is accessible only with the Range key.
Input impedance: approx. 10.6M // 50 pF
2) The display indicates "+OL" above +1050V and "-OL" below -1050V.
Secondary measurements and displays: MAX, MIN, AVG
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
60mV range: Measuring a strong current or measuring a current for a long time may
cause a temperature rise of some components.
Protection: 1414 Vpk
Range
Operating
range
Specified
measurem.
range 4)
Resolution
Uncertainty (±)
Additional
uncertainty
F(Hz) 1)
Pass band
@ 1kHz
Input
impedance
//<50 pF
Peak
factor
60mV
2)
0 to
60.000mV
6.000 to
60.000mV
0.001mV
1.5% L
± 35D
45<F<65Hz
0.3% L typ.
at 100Hz
0.7% L typ.
at 150Hz
1.8% L typ.
at 300Hz
30% L typ.
400Hz 10.612 M
3 to
50.0mV
600mV
0 to
600.00mV
60.00 to
600.00mV
0.01mV
1%
L
+ 0.25%x
[F(kHz)-1] L
± 30D
10Hz to
50kHz
( 23%
@100kHz)
10.9 M
3 to
500.0mV
6V
0 to
6.0000V
0.6 to
6.0000V
0.0001V
0.5% L
+ 0.18%x
[F(kHz)-1] L
± 25D
10Hz to
100kHz
10.9 M
3 to
5.0V
60V
0 to
60.000V
6.000 to
60.000V
0.001V 10.082 M
3 to
50.0V
600V 0 to 600.00
V
60.00 to
600.00V
0.01V 10.008 M
3 to
500.0V
1000V
3)
0 to
1000.0V
60 to
1000.0V
0.1V 10.008 M
1.42 to
1000.0V
Page 51
Technical characteristics of the MTX 3291
6,000- and 60,000-count digital multimeters 51
Technical characteristics of the MTX 3291 (continued)
V
AC RMS
(continued)
1) See the typical curve of the 300Hz.
2) This range is accessible only with the Range key
Input impedance: approx. 10.6M // 50 pF
3) The LCD indicates “+OL” above +1050V, “-OL” below -1050V or above 1050VRMS.
4) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG, PEAK
VLowZ AC RMS
The pass band (between 3dB down points) is reduced to 300Hz, if the filter is activated. In
VLowZ, there is no 60mV range.
The frequency measurement is made like the measurement in a 300Hz pass band.
Protection: 1414 Vpk
Range
Operating
range
Specified
measurement
range 3)
Resolution
Uncertainty (±)
Additional
uncertainty
F(Hz) 1)
Pass band
Input
impedance
//<50 pF
600mV
0 to
600.00mV
60.00 to
600.00mV
0.01mV
1% L+ 0.25%x
[F(kHz)-1] L
± 30D
45<F<65Hz
0.3% L typ.
at 100Hz
0.7% L typ.
at 150Hz
1.8% L typ.
at 300Hz
30% L typ.
≅ 300 k
3 to
500.0mV
6V
0 to
6.0000V
0.6 to
6.0000V
0.0001V
0.5% L+
0.18%x
[F(kHz) -1] L
± 25D
3 to 5.0V
60V
0 to
60.000V
6.000 to
60.000V
0.001V 3 to 50.0V
600V 0 to 600.00V
60.00 to
600.00V
0.01V 3 to 500.0V
1000V
2)
0 to
1000.0V
60 to
1000.0V
0.1V
1.42 to
1000.0V
1) See the typical curve of the 300Hz.
2) The LCD indicates “+OL” above +1050V, “-OL” below -1050V or above 1050VRMS.
3) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG, PEAK
VAC+DC TRMS
60mV range: Measuring a strong current or measuring a current for a long time may cause a
temperature rise of some components.
Protection: 1414 Vpk
Range
Operating
range
Specified
measurem.
range 4)
Resolution
Additional
uncertainty
DC (±)
Uncertainty
AC (±)
Additional
uncertainty
F(Hz) 1)
Pass band
Input
impedance
//<50 pF
Peak factor
60mV 2)
0 to
60.000mV
6.000 to
60.000mV
0.001mV
± 15D
1.5% L
±35D
45<F<65Hz
0.3% L typ.
at 100Hz
0.7% L typ.
at 150Hz
1.8% L typ.
at 300Hz
30% L typ.
≈ 400Hz
10.612 M
3 to
50mV
600mV
0 to
6
00.00mV
60.00 to
600.00mV
0.01mV
0.8% L
+ 0.18%x
[F(kHz)-1] L
±30D
10Hz to
50kHz
10.9 M
3 to
500mV
6V
0 to
6.0000V
0.6 to
6.0000V
0.0001V
0.5% L
+ 0.18%x
[F(kHz)-1] L
±25D
10Hz to
100kHz
10.9 M
3 to 5V
60V
0 to
60.000V
6.000 to
60.000V
0.001V
10.082 M
3 to
50V
600V
0 to
600.00V
60.00 to
600.00V
0.01V
10.008M
3 to
500V
1000V
3)
0 to
1000.0V
60 to
1000.0V
0.1V
10.008 M
1.42 to
1000V
1) See the typical curve of the 300Hz.
2) This range is accessible only with the Range key - Input impedance: approx. 10.6M//50 pF
3) The LCD indicates “+OL” above +1050V, “-OL” below -1050V or above 1050VRMS.
4) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG, PEAK
Page 52
Technical characteristics of the MTX 3291
52 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3291 (continued)
Currents
Three possible modes: DC, AC, AC+DC
In DC mode, you can measure a direct current or the DC component of an
alternating current.
In the AC and AC+DC modes, you can measure the true RMS (TRMS) value of
an alternating current with/without its direct component (no capacitive coupling in
"DC" mode).
DC current
Particular reference conditions:
600µA and 6mA ranges
: Measuring a strong current for a long time may cause a
temperature rise of some components. In this case, it is necessary to wait some
time for the metrological characteristics specified in these ranges.
Range
Operating
range
Specified
measurement
range
Resolution
Uncertainty
(±)
Voltage drop Protection
600µA
0 to
600.00µA
0.02 to
600.00µA
0.01µA 1% L ±25D 10mV/mA
Fuse
11A/1000V
>20kA
6mA
0 to
6000.0mA
0.002 to
6.0000mA
0.1µA 0.8% L ±25D 25mV/mA
60mA
0 to
60.000mA
0.020 to
60.000mA
0.001mA 0.8% L ±20D 3mV/mA
600mA
0 to
600.00mA
0.20 to
600.00mA
0.01mA 0.8% L ±20D 0.58mV/mA
6A
0 to
6.0000A
0.2000 to
6.0000A
0.0001A 0.8% L ±20D 0.05V/A
10A/20A
(∗)
0 to
20.000A
0.200 to
20.000A
0.001A 0.8% L ±20D 0.05V/A
The display indicates “OL” above 19.99A. The
symbol blinks and a beep
sounds above 10A.
(∗) Acceptable overload: 10A to 20A for 30s max. with a pause of 5min between 2
measurements. Ambient temp. 35°C max.
Secondary measurements and displays: MAX, MIN, AVG
Page 53
Technical characteristics of the MTX 3291
6,000- and 60,000-count digital multimeters 53
Technical characteristics of the MTX 3291 (continued)
AAC RMS current
Range Operating range
Specified
measurement
range
Resolution
Uncertainty (±)
40Hz to 20kHz
(**)
Peak factor
Voltage
drop
Protection
600µA
0 to
600.00µA
60 to
600.00µA
0.01µA
1.5% L
±30D
2.6 to
500µA
10mV/µA
Fuse
11A
/1000V
>20kA
6.000mA
0 to
6.0000mA
0.6000 to
6.0000mA
0.1µA
1.2% L+[0.08%
x (FkHz-1)] L
±25D
2.6 to
5mA
25mV/mA
60mA
0 to
60.000mA
6.000 to
60.000mA
0.001mA
1% L+[0.08%
x (FkHz-1)] L
±25D
2.6 to
50mA
3mV/mA
600mA
0 to
600.00mA
60.00 to
600.00mA
0.01mA
2.6 to
500mA
0.58mV/mA
6A
0 to
6.0000A
0.6000 to
6.000A
0.0001A
1% L +[0.1%
x (FkHz-1)] L
±25D
2.8 to 5A 0.05V/mA
10A/20A
(∗)
0 to
20.000A
1.000 to
20.000A
0.001A
1.2% L+ [0.1%
x (FkHz-1)] L
±25D
3.7 to 8A 0.05V/mA
The display indicates “OL” above 19.99A. The
symbol blinks and a beep
sounds above 10A.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG,
PEAK
(∗) Acceptable overload: 10A to 20A for 30s max. with a pause of 5min between 2
measurements. Ambient temp. 35°C max.
(∗∗) Additional uncertainty with the 300Hz filter.
AAC+DC TRMS current Warning: the sum AC+DC must never exceed the range, 600mA, or
60mA, or 6mA, or 600µA or 6A, or 10A, as the case may be.
The AC component must represent at least 5% of the amplitude of the AC+DC total
for it to be possible to measure it.
Range
Operating
range
Specified
measurement
range
Resolution
Uncertainty (±)
40Hz to 20kHz
(**)
Peak
factor
Voltage
drop
Protection Range
600µA
0 to
600.00µA
60 to
600.00µA
0.01µA
1.5% L
±20D
±20D
2.6 to
500µA
10mV/µA
Fuse
11A/1000
V
>20kA
6mA
0 to
6.0000µA
0.6000 to
6.0000mA
0.1µA
1% L +[0.08% x
(FkHz - 1)]L
±25D
±15D
2.6 to 5mA 25mV /mA
60mA
0 to
60.00mA
6.000 to
60.000mA
0.001mA
1% L +[0.08%x
(FkHz - 1)]L
±25D
2.6 to
50mA
3mV/mA
600mA
0 to
600.00mA
60.00 to
600.00mA
0.01mA
2.6 to
500mA
0.58mV/m
A
6A
0 to
6.0000A
0.6000 to
6.000A
0.0001A
1% L+[0.1%x
(FkHz-1)]L
±25D
2.8 to 5A 0.05V /mA
10A/20A
(∗)
0 to
20.00A
0.600 to
20.000A
0.001A
1.2% L+ [0.1%x
(FkHz-1)]L
±25D
3.7 to 8A 0.05V /mA
The display indicates “OL” above 19.99A. The
symbol blinks and a beep sounds
above 10A.
(∗) Acceptable overload: 10A to 20A for 30s max. with a pause of 5min between 2
measurements. Ambient temp. 35°C max.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG, PEA
K
(∗∗) Additional uncertainty with the 300Hz filter.
Page 54
Technical characteristics of the MTX 3291
54 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3291 (continued)
Frequency
Main frequency
measurement
In this setting, you can measure the frequency of a voltage.
Particular reference conditions
: 150mV <U <600V
When the switch is set to Hz, the 300Hz filter is not in service.
Protection: 1414 Vpk
Range Operating range
Specified
measurement
range
Resolution Intrinsic error
60Hz 10.00 to 60.00Hz 10.00 to 60.00Hz 0.01Hz
0.1% L ±1D
600Hz 10.0 to 600.0Hz 10.0 to 600.0Hz 0.1Hz
6kHz 0 to 6.000kHz 0.010 to 6.000kHz 0.001kHz
60kHz 0 to 60.00kHz 0.01 to 60.00kHz 0.01kHz
600kHz 0 to 200.0kHz 0.1 to 200.0kHz 0.1kHz
Below 10Hz, or if the signal detection level is inadequate, the reading is forced to
zero.
* The measured period in ms is available on the second display unit.
Secondary
frequency
measurement
You can measure the frequency and magnitude of a voltage or of a current
simultaneously.
Same accuracy as in the "Hz" setting
Particular reference conditions
: 150mV <U <600V
0.15A <I <10A
Max. frequency measurable in volts: 100kHz
(except 60mV range Æ 400Hz and
600mV range Æ 50kHz)
Max. frequency measurable in amperes: 20kHz
When the switch is set to VLowZ, Volts or Ampere, if the 300Hz filter is activated,
the measurable frequency remains within the limits of the PB of the filter.
Below 10Hz, or if the signal detection level is inadequate, the reading is forced to
“-----“.
Page 55
Technical characteristics of the MTX 3291
6,000- and 60,000-count digital multimeters 55
Technical characteristics of the MTX 3291 (continued)
Resistance
Ohmmeter In this setting, the user can measure a resistance.
Particular reference conditions
:
The (+COM) input must not have been overloaded following the accidental
application of a voltage to the input terminals with the switch set to or T°.
If this happens, the return to normal may take about ten minutes.
Protection: 1414 Vpk
Range
Specified
measurement
range
Resolution Uncertainty
Measurement
current
Open-circuit
voltage
600
0 to 600.00 (∗)
0.01 0.2% L ±20D 1mA
<5V
6k 0 to 6.0000k 0.0001k
0.2% L ±20D
126.6A
60k 0 to 60.000k 0.001k 12.6A
600k 0 to 600.00k 0.01k 1.26A
6M 0 to 6.0000M 0.0001M 1.5% L ±30D 240nA
60MΩ 0 to 60.000MΩ
0.001M 3% L ±30D 29nA
(∗)
REL measurements
Capacity
Capacitance meter In this setting, the user can measure the capacitance of a capacitor.
Range
Operating
range
Specified
measurement
range
Resolution
Intrinsic
error
Measurement
current
Measuremen
t
time
6nF 0.100 to 6.000nF 0.100 to 6.000nF0.001nF 2% L ±30D
1.26µA
400ms
60nF 0 to 60.00nF 0 to 60.00nF 0.01nF 1% L ±8D
1.26µA
400ms
600nF 0 to 600.0nF 0 to 600.0nF 0.1nF 1% L ±5D 1.26µA 400ms
6µF 0 to 6.000µF 0 to 6.000µF 0.001µF 1% L ±5D 12.6µA 0.125 s/µF
60µF 0 to 60.00µF 0 to 60.00µF 0.01µF 1% L ±5D 126.6µA 0.125 s/µF
600µF 0 to 600.0µF 0 to 600.0µF 0.1µF 3% L ±5D 1mA 0.125 s/µF
6mF 0 to 6.000mF 0 to 6.000mF 1µF 4% L ±5D 1mA 17 s/mF
60mF 0 to 60.00mF 0 to 60.00mF 10µF 6% L ±5D 1mA 17 s/mF
The use of wires that are very short and shielded is strongly recommended.
Protection: 1414 Vpk
Page 56
Technical characteristics of the MTX 3291
56 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3291 (continued)
Diode test
Range Resolution Accuracy Open-circuit voltage
Measurement
current
3V 0.1mV 1% L ±30D <5V <1.1mA
Audible signal triggered if <40mV ±10mV
Protection: 1414 Vpk
Audible continuity
Range Resolution Accuracy
Open-circuit
voltage
Measurement
current
Protection
600 0.01 0.2% L ±20D <5V <1.1mA 1414 Vpk
Response time: <100ms
Triggering threshold: <30 ±5
Protection: 1414 Vpk
Clamp
You can measure a current using various current clamps and obtain a direct
reading of the current by selecting the correct transformation ratio, which must be
the same as that of the clamp.
If the signal detection level is insufficient, the value is forced to "-----"
The input impedance is approximately 10M.
* Add the error of the clamp to the intrinsic error of the multimeter, specified
in the tables below.
DC current
Range
Ratio
600mA 6A 60A 600A 6000A
1mV/A
Resolution
0.01A 0.1A 1A
Accuracy 0.5% L ±2D 0.5% L ±2D 0.05% L ±2D
10mV/A
Resolution 0.001A 0.01A 0.1A
Accuracy
0.5% L ±2D 0.5% L ±2D 0.05% L ±2D
100mV/A
Resolution 0.1mA 0.001A 0.01A
Accuracy 0.5% L ±2D 0.5% L ±2D 0.05% L ±2D
1000mV/A
Resolution
0.1mA 0.001A
Accuracy 0.5% L ±2D 0.05% L ±2D
Secondary measurements and displays: MAX, MIN, AVG and transformation ratio
of the sensor
Page 57
Technical characteristics of the MTX 3291
6,000- and 60,000-count digital multimeters 57
Technical characteristics of the MTX 3291 (continued)
AAC RMS current
Range
Ratio
600mA 6A 60A 600A 6000A
1mV/A
Resolution
0.01A 0.1A 1A
Accuracy
1.5% L ±5D
(BW 400Hz)
1% L+0.25%
x [F(kHz)-1] L
±5D
(BW: 10Hz to
50kHz)
0.5% L+0.18%
x [F(kHz)-1] L
±3D
(BW: 10Hz to
100kHz)
10mV/A
Resolution
0.001A 0.01A 0.1A
Accuracy
1.5% L ±5D
(BW 400Hz)
1% L+0.25%
x [F(kHz)-1] L
±5D
(BW: 10Hz to
50kHz)
0.5% L+0.18%
x [F(kHz)-1] L
±3D
(BW: 10Hz to
100kHz)
100mV/A
Resolution 0.1mA 0.001A 0.01A
Accuracy
1.5% L ±5D
(BW 400Hz)
1% L+0.25%
x [F(kHz)-1] L
±5D
(BW: 10Hz to
50kHz)
0.5% L+ 0.18%
x[F(kHz)-1] L
±3D
(BW: 10Hz to
100kHz)
1000mV/A
Resolution 0.1mA 0.001A
Accuracy
1% L+0.25%
x [F(kHz)-1] L
±5D
(BW: 10Hz to
50kHz)
0.5% L+ 0.18%
x [F(kHz)-1] L
±3D
(BW: 10Hz to
100kHz)
Peak factor 3 to 500mA 3 to 5A 3 to 50A 3 to 500A 3 to 5000A
From 1kHz, the measurement must exceed 15% of the range
Secondary measurements and displays: MAX, MIN, AVG and transformation
ratio of the sensor
300Hz filter: if the filter is active, see “300Hz filter” curve for the additional
uncertainty.
AAC+DC TRMS
current
Range
Ratio
600mA 6A 60A 600A 6000A
1mV/A
Resolution
0.01A 0.1A 1A
Accuracy
1.5% L ±15D
(BW 400Hz)
0.8% L+0.18%
x [F(kHz) -1] L
±15D
(BW: 10Hz to
50kHz)
0.5% L+0.18%
x [F(kHz) -1] L
±13D
(BW: 10Hz to
100kHz)
10mV/A
Resolution
0.001A 0.01A 0.1A
Accuracy
1.5% L ± 5D
(BW 400Hz)
0.8% L+0.18%
x [F(kHz) -1] L
±15D
(BW: 10Hz to
50kHz)
0.5% L+0.18%
x [F(kHz) -1] L
±13D
(BW: 10Hz to
100kHz
100mV/A
Resolution 0.1mA 0.001A 0.01A
Accuracy
1.5% L ±5D
(BW 400Hz)
0.8% L+0.18%
x [F(kHz) -1] L
±15D
(BW: 10Hz to
50kHz)
0.5% L+0.18%
x [F(kHz) -1] L
±13D
(BW: 10Hz to
100kHz
1000mV/A
Resolution 0.1mA 0.001A
Accuracy
0.8% L+0.18%
x [F(kHz) -1] L
±15D
(BW: 10Hz to
50kHz)
0.5% L+0.18%
x [F(kHz) -1] L
±13D
(BW: 10Hz to
100kHz
Peak factor 3 to 500mA 3 to 5A 3 to 50A 3 to 500A 3 to 5000A
From 1kHz, the measurement must exceed 15% of the range
Secondary measurements and displays: MAX, MIN, AVG and transformation
ratio of the sensor
300Hz filter: if the filter is active, see “300Hz filter” curve for the additional
uncertainty.
Page 58
Technical characteristics of the MTX 3291
58 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3291 (continued)
Temperature
Pt100/Pt1000
The user can measure the temperature by means of a Pt100/Pt1000 sensor.
Range Measurement current Resolution Accuracy Protection
-200°C to
+800°C
<1mA (Pt100)
<0.1mA (Pt1000)
0.1°C
0.1% L ±1°C
1414 Vpk
"Active" protection by PTC thermistor
Display in °C/°F possible
Peak
Add 1% L + 30 D to obtain the accuracy corresponding to the function and the
range.
Fmax 1kHz (1ms)
Protection 1414 Vpk
SURV
MIN, MAX, AVG
Add 0.2% L+2D to obtain the accuracy corresponding to the function and the
range.
Acquisition time of the extrema approximately 100ms
Protection 1414 Vpk
Resistive power
Display of the resistive power with respect to a reference resistance measured on
the installation and saved in memory using the HOLD key (600 is the default)
The function determined is: (measured AC+DC voltage)
2
/ VRref
Range DC, AC and AC+DC
Resolution 1mW
Accuracy: 2 x accuracy V
AC (in %)
Max. measurement voltage 1000V
AC+DC
Protection 1414 Vpk
Unit of display W
Duty cycle
Display of the measurement in % of a logical signal (TTL, CMOS, etc.) in
"AC+DC" mode
DC+ duty cycle = θ
DC- Duty cycle = T - θ
Resolution 0 .01%
Minimum duration for θ 10 μs
Maximum duration for T 0 .8 s
Minimum duration for T 200 μs [5kHz]
Nominal range 5 to 95% typical
Sensitivity (10V range) >10% of the range, Freq <1kHz
>20% of the range, Freq >1kHz
Absolute error on the duty
cycle, expressed in % absolute ± [0.1%+0.045%*(RC-50)], Freq <1kHz
± [0.5%+0 .06% *(RC-50)], Freq >1kHz
Protection 1414 Vpk
T
θ
Page 59
Technical characteristics of the MTX 3291
6,000- and 60,000-count digital multimeters 59
Technical characteristics of the MTX 3291 (continued)
Pulse width
(
) ( )
Depending on frequency counter triggering conditions.
Resolution 10µs
Minimum pulse width 100µs
Accuracy 0.1% ±10µs
Maximum duration of a period 1.25s (0.8Hz)
Triggering threshold 20% of the range except 1000VAC range
This threshold is: positive in
, negative in .
Additional error on the measurement due to the slope at the zero crossing:
See §. Measurement of duty cycle.
Protection 1414 Vpk
dBm Display of the measurement in dBm with respect to a resistance reference
chosen by the user from among 50Ω, 75Ω, 90Ω, and 600Ω,
(default value 600Ω)
Resolution 0.1dBm
Absolute error in dBm 0.09 x relative error V
AC expressed in %
Additional calculation error 0.1dBm
Measurement range 10mV to 1000V
Protection 1414 Vpk
Operation
of the audible beep
Beep reporting a valid key
High-pitched
sound
Beep reporting an invalid key
Low-pitched
sound
Successive beeps reporting an overshoot of the danger
threshold (alarm)
High-pitched
sound
Successive beeps reporting recording of the MAX, MIN, PEAK
High-pitched
sound
Successive beeps (alarm) Æ current >10A
High-pitched
sound
Continuity measurement
Mediumpitched sound
Page 60
Technical characteristics of the MTX 3291
60 6,000- and 60,000-count digital multimeters
Technical characteristics of the MTX 3291 (continued)
Variation in the
nominal range of use
Quantity of
influence
Range of
influence
Quantity influenced
Influence
typical MAX
Batt. voltage 4V to 6V all
<3D
0.2% L+1D
Temperature
-10°C… 18
28 ... 55°C
VDCmV 0.02% L ±0.2D/1°C 0.04% L ±0.25D/1°C
VACmV, V
LowZ
mV 0.08% L ±0.2D/1°C 0.15% L ±0.25D/1°C
VDC 0.01% L ±0.1D/1°C 0.05% L ±0.1D/1°C
VAC, VAC+DC,VLowZ 0.25% L ±0.1D/1°C
ADC 0.05% L ±0.1D/1°C 0.1% L ±0.1D/1°C
AAC and AAC+DC 0.08% L ±0.1D/1°C 0.12% L ±0.1D/1°C
0.01% L ±0.1D/1°C 0.1% L/1°C
Ω
0.05% L/1°C 0.1% L/1°C
60 MΩ
0.3% L/1°C
µF 0.2% L ±0.1D/1°C
mF 0.6% L ±0.1D/1°C
Hz 0.01% L/1°C
Temp.
± 2°C+0.05% L/1°C
Stabilization time
≈ 2h
2.5h
Humidity
(without
condensation)
10%... 80% RH
V
A
Ω (*)
Hz
0 0
EMC
(immunity to the
radiated field)
300MHz...
500MHz
clamp
600 pts
300MHz...
500MHz
450 pts
Common mode
1000V
50Hz
VAC, VAC+DC,V
LowZ
Range typical
60mV
600mV
>35dB
6V >60dB
60V
600V
1000V
>95dB
Response of the
300Hz filter
-60,00
-50,00
-40,00
-30,00
-20,00
-10,00
0,00
0 50 100 150 200 250 300 350 400 450
Fr
equency (Hz)
Erreur (%)
Erreur (% )
Page 61
General, mechanical charateristics
6,000- and 60,000-count digital multimeters 61
General characteristics
Environmental
conditions
Altitude <2000m
Reference range 23°C ±5°C
Specified range of use -10°C to 55°C
Influence of temperature see §. Influences
Relative humidity 0% to 80% from 0°C to 31°C
0% to 70% from 40°C to 55°C
limited to 70% for the 6 and 60 ranges
Dust- and water-tightness IP67 (in the event of immersion, under 1m of
water for 30 mn, it is necessary to let the
water flow off or to let the unit dry before
putting it back into service).
Storage range - 20°C to 70°C
Power supply
The multimeter is powered by primary or rechargeable batteries:
• Batteries, 4x1.5V nominal – LR6, Alkaline
Life in V
DC:
MTX3290: 200h
MTX3291: 300h
• Rechargeable batteries, 4x1.2V, A-A, Ni-MH LSD, 2400mAh
Life in V
DC:
MTX3290: 140h
MTX3291: 210h
Display
The refresh rate of:
- the display unit is 200ms
- the bargraph is 100ms.
Security
According to NF EN 61010-1:
• Insulation class 2
• Degree of pollution 2
• Use indoor
• Altitude <2000m
Measurement category of the "measurements"
MTX3290: 600V CAT III and 300V CAT IV with respect to earth
MTX3291: 1000V CAT III and 600V CAT IV with respect to earth
CEM
This instrument is designed in conformity with the EMC standards in force and
its compatibility has been tested in accordance with the following standards:
• Emissions (cl. A) and Immunity NF EN 61326-1
Mechanical characteristics
Housing
• Dimensions 196 x 90 x 47.1mm
• Mass 570g
• Materials Polycarbonate (PC)
• Dust- and water-tightness IP67, according to NF EN 60529
Page 62
Supply
62 6,000- and 60,000-count digital multimeters
Supply
with the
instrument
• Directions for operation in 5 languages, on mini CD
• SX-DMM software on mini CD (MTX 3291, only)
• Getting started guide
• 1 set of safety leads (red and black) with double insulation probe tip (∅4mm)
1000V, CAT III, 20A
• 1 set of 4 AA/R6 batteries
• 1 statement of manufacturer's measurements
• Optical USB communication lead (MTX 3291, only)
• 1 carrying case (MTX 3291, only)
optional
• Current clamps (see table below)
• Two-wire Pt100 temperature probe (HX0091)
• Two-wire Pt1000 temperature probe (HA1263)
• Metrology software for Windows (P01196770)
• Set of 4 rechargeable batteries (external charger) (HX0051B)
• External charger for 4 Ni-MH rechargeable batteries (HX0053)
• HV probe (SHT 40kV)
• CMS clamp (HX0064)
• Multifix adapter for DMM (P01102100Z)
spare
• MTX 3291: Fuse, 11A, 10x38, 1000V - Fast - breaking capacity: >20kA
MTX 3290: Fuse, 10A: 6x32 - 600V - Fast - breaking capacity: >50kA
(Get in touch with our Manumesure Regional Technical Centre).
• Kit of test accessories for DMM (P01295459Z)
• Carrying case with Multifix (HX0052B)
List of clamps
set to mV/A Ratio To order
Miniflex MA100
from 0 .5 to 3000 A
AC
10Hz to 20kHz 1 or 10 or 100 P0112056X
Ampflex A100
from 0 .5 to 3000 A
AC
10Hz to 20kHz
1 or 10 or 100 P0112050X
MNXX or MN 73 clamps
from 0 .1 to 240 A
AC
40Hz to 10kHz 10 P01120421
E3N-6N clamps
from 0 .05 to 80 A
AC/DC
DC to 8kHz 1 or 10 or 100 P0112004XA
PACXX clamps
from 0 .2 to 1400 A
AC/DC
DC to 10kHz 1 or 10 P0112006X/P0112007X
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