AEMC Instruments MTX 3291, MTX 3290 User manual

Portable multimeters

with digital display

ASYC-IV

MTX 3290 - 6000 cts
MTX 3291- 60000 cts

Operating instructions

Pôle Test et Mesure CHAUVIN ARNOUX

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

General directions

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

Find Quality Products Online at: [e-mail]

2 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

General directions

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:

Display digital, monochrome,

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.

MTX 3290 MTX 3291

digital, monochrome,

(70x52)

backlit (70x52)

Precautions and safety measures

before use

during use

• 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.

• 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.

• Read closely all notes preceded by the

• As a safety measure, use only the appropriate leads and accessories

supplied with the instrument or approved by the manufacturer.

symbol.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 3

www.GlobalTestSupply.com

General directions

General directions (continued)

Safety feature

Features

protecting the

measurement

inputs

• It is impossible to open the battery or fuse compartment without first
disconnecting the measurement leads.

• During a measurement exceeding 60V
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.

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

DC or 25VAC the symbol blinks on

Special functions

Automatic

detection

Automatic

switching off

Warning

signals

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.

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

multimeter.

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
display unit.

This symbol is activated when the voltage on the "V" input exceeds 60V

AC in the "Voltage" setting or when the current injected between the A and

25V
COM terminals exceeds 10A.

DC or 25VAC on the terminals of the

symbol on the

DC or

Find Quality Products Online at: [e-mail]

4 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

General directions

General directions (continued)

Definitions of the

measurement

categories

Warning! Using a measuring instrument, a lead, or an accessory belonging to a lower

Symbols on the instrument

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.

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.

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

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 5

www.GlobalTestSupply.com

General directions

General directions (continued)

Warranty

Maintenance, metrological verification

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.

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

Repair under warranty and post warranty

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.

For all repairs before or after expiry of warranty, please return the device to your
distributor.

Find Quality Products Online at: [e-mail]

6 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

General directions

General directions (continued)

Maintenance

Replacing the fuse

• 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.

).

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

Active
communication
interface
(MTX 3291 only)

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.

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

.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 7

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments

MTX 3290

Frontal panel

Back

Prop

Terminal block

Optical connector:
not active !

Find Quality Products Online at: [e-mail]

8 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments (continued)

MTX 3291

Frontal panel

Back

Prop

Terminal block

Optical connector: active!

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 9

www.GlobalTestSupply.com

Description of the instruments

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

double 6,000-pts display

LowZ AC voltage measurement at low impedance (VLowZ)

• V

• V

AC AC voltage measurement

• V

AC/DC DC or AC+DC voltage measurement at high impedance (V)

MTX3290

double 60,000-pts display

MTX 3291

• 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

Find Quality Products Online at: [e-mail]

10 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments (continued)

Symbols Designation

AC

DC

AC+DC

AUTO

Measurement of the AC signal

Measurement of the DC signal

Measurement of the AC and DC signal

Automatic range switching

Δ REL

REF

HOLD

MAX MIN AVG

MAX

MIN

AVG

PEAK

PEAK+

PEAK-

.run r.un ru.n

----- Frequency measurement impossible

O.L

USER

BASIC

Z

Z

Ω

Ω

%

PT100

PT1000

Values relative to a reference

Reference value

Storage and display of stored values

Value (surveillance)

Maximum value

Minimum value

Mean value

Peak value

Maximum peak value

Minimum peak value

Capacitance meter, acquisition in progress

Overshoot of the measurement capacities

USER mode (on main display unit)

BASIC mode (on main display unit)

Hertz symbol (main display unit)

Hertz symbol (secondary display unit)

Ohm (main display unit)

Ohm (secondary display unit)

Percentage

Positive pulse

Negative pulse

Symbol for temperature measurement using a Pt100 probe

Symbol for temperature measurement using a Pt1000 probe

LEADS

LowZ

♪

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 11

Symbol for measurement using a current clamp

Function selected incompatible with the connection of the lead

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)

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments (continued)

600V CAT III

1000V CAT III

This symbol indicates the battery charge level.

Volt, Ohm, temperature, etc. measurement input

COM measurement input

Ampere measurement input

Input indication

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.

(

Find Quality Products Online at: [e-mail]

12 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments (continued)

Switch

MTX 3290

Keys of the 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.

Short press Successive short presses

Current measurement

Temperature measurement

Capacitance measurement

Low-impedance AC voltage
measurement (VLowZ)

Selection of the type of probe:
Pt100, Pt1000

Current measurement using a
current clamp

Resistance measurement,
audible continuity
measurement, diode test

Frequency measurement

Voltage measurement

Selection of the transformation ratios
1, 10, 100, 1,000mV/A

Selection of the continuity, diode
functions

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 13

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments (continued)

MTX 3291

Keys of the switch

Short press Successive short presses

Current measurement

Temperature measurement

Capacitance measurement

Low-impedance AC voltage
measurement (VLowZ)

Current measurement using a
current clamp

Resistance measurement,
audible continuity
measurement, diode test

Frequency measurement

Selection of the type of probe:
Pt100, Pt1000

Selection of the transformation ratios
1, 10, 100, 1,000mV/A

Selection of the continuity, diode
functions

Selection of the functions:

- Positive duty cycle

- Negative duty cycle

- Positive pulse width

- Negative pulse width

Find Quality Products Online at: [e-mail]

14 6,000- and 60,000-count digital multimeters

Voltage measurement

www.GlobalTestSupply.com

Selection of the functions:
dBm, W

Description of the instruments

Description of the instruments (continued)

Keypad

Function keys

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.

MTX 3290

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.

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 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.

x100

MTX 3291

- Hold of the display after
stabilization of the
measurement (Auto
HOLD)

- Exit from the
Auto HOLD mode

Activation/deactivation of
auto power off (APO)

(MTX 3291 only)

Activation/deactivation of
the key-press beep

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 15

www.GlobalTestSupply.com

Description of the instruments

Description of the instruments (continued)

(∗)

(∗) see example

p. 22.

(∗)

(∗) see example

p. 19.

Manual selection of measurement
range: the range defines the maximum
measurement range the instrument can
cover.

The Auto Range mode is default.

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.

st

press: recording of PEAK+, PEAK-

- 1
(on the 2nd display unit).
The PEAK+ value is displayed as
default.

- Subsequent presses: look-up of stored
values (volatile).

Activation of the MAX, MIN, AVG
measurements:

- MAX and MIN inform the highest and
lowest values of the effective
measurement

- 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)

st

press: recording of the MAX, MIN,

- 1
AVG (on the 2nd display unit).
The max. value is displayed by
default.

- Subsequent presses: look-up of the
stored values (volatile).

Used to return to Auto
Range mode.

Exit from the Peak mode

Exit from the
MAX, MIN, AVG mode

Activation of the relative display mode:

- Display and storage of the reference
and differential values in the unit of
the quantity measured.

st

press: activates the relative mode

- 1
∆REL

(∗)

(∗) see example

p. 23.

Find Quality Products Online at: [e-mail]

16 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

(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

Description of the instruments

Description of the instruments (continued)

* Remark 1

* Remark 2

- The 0 centre bargraph is managed automatically in IDC and VDC (MTX 3291
only).

When the multimeter is switched on:

- 1st press on
segments of the display unit.

nd

press Æ display of model and version (US/Europe)

- 2

rd

- 3

press Æ software version (display unit 1) and keyboard and display unit

board versions (display unit 2)

th

press Æ normal operation. An audible beep acknowledges key presses.

- 4

USER/BASIC mode: During power up, the device is in BASIC mode (default
configuration Volt AC+DC).

Activation of the Backlight:

- successive presses to increase the
brightness

- circular operation: brightness 1 Æ
brightness 2 Æ brightness 3
Æ brightness 1

Activation/Deactivation of the zero
centre bargraph:

MTX 3290 only

Activation/Deactivation of auto power
off:

MTX 3290 only

(sustained press)+press on ON/OFF Æ display of all

Deactivation of the
Backlight

Connection

in Volt

and other functions

in Ampere

• If, when you power up your multimeter
mode to recover the configuration when the multimeter was switched off,

press the

• 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.

key, hold it down, then press ON/OFF ( ).

, you want to activate the USER

* In the Volt and Ampere functions, the multimeter starts up in AC+DC, as

in the USER mode.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 17

www.GlobalTestSupply.com

Getting started

Getting started

Preparation for use

Instructions before

starting up

Power supply The devices operate with:

Powering up,

down

Power-up

configuration

When you use this multimeter, you must observe the usual safety rules,
which:

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.

The rechargeable batteries cannot be recharged in the multimeter.

Press ON/OFF

* Reminder: after replacing the batteries, wait 10s before powering

If the multimeter malfunctions, a long press (>2s) on this key can

In the Volt and Ampere functions, the instrument restarts in AC+DC.

• protect you from electrical hazards,

• protect the multimeter from operator errors.

• 4 1.5V alkaline batteries (LR6-AM3-AA) or

• 4 1.2V NI-MH rechargeable batteries of the same type.

to power up the device.

the device back up.

be applied to power down the instrument and then restore normal
operation.

In the BASIC mode, as default, the
device starts up in its elementary
configuration (default values) and in

Ac+DC function.

the V

MTX 3291 only: in the USER mode,
the device restarts in the
configuration and function selected
when it was powered down.

Automatic power

down

Find Quality Products Online at: [e-mail]

18 6,000- and 60,000-count digital multimeters

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.

www.GlobalTestSupply.com

Functional description

Functional description

1. MAX MIN AVG mode A beep indicates an overshoot or a change of quantity.

unit

unit

Measured signal: 230V, 50Hz:

#

Displays in the

AC+DC function

V

Main display

Secondary display

* The examples described in this chapter use an

Present value of the signal

Frequency of the signal

for the MAX value:

st

1

press on :

Present value of the signal

MAX value

The measured signal changes to 250V,
50Hz:

h: min: sec

MAX value

# Ex.: 27s

Momentary screen (4s) indicating the

time-stamped max. value, if the value

changes or if the value is looked up.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 19

www.GlobalTestSupply.com

Functional description

Functional description (continued)

for the MIN value:

# Ex.: 3s

The display then becomes:

nd

2

press :

Present value of the signal

MAX value

h: min: sec

MIN value

Momentary screen (4s) indicating the
time-stamped max. value, if the value

changes or if the value is looked up.

The display then becomes:

Present value of the signal

MIN value

Find Quality Products Online at: [e-mail]

20 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Functional description

Functional description (continued)

for the AVG value:

De-activation

rd

3

press on :

By a long press on the key.

Present value of the signal

AVG value

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 21

www.GlobalTestSupply.com

Functional description

Functional description (continued)

2. PEAK mode A beep indicates an overshoot or a change of quantity.

#

Displays in the

AC+DC function

V

Measured signal: 250V, 50Hz:

Present value of the signal

Secondary measurement

for the Peak+ value:

for the Peak- value:

First press on :

Second press on :

Present value of the signal

Peak+ value

Present value of the signal

Peak- value

De-activation

By a long press on the key.

Find Quality Products Online at: [e-mail]

22 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Functional description

Functional description (continued)

3. ∆REL mode

#

Displays in the

AC+DC function

V

Activation of the

Δ

REL mode by

Short press on the key:

Measured signal: 1V, 100Hz:

Present value of the signal

Frequency of the signal

REL=(present value - reference value)

Reference value

The measured signal changes to1.5V:
(REL=1.5V- 1V=0.5V)

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 23

www.GlobalTestSupply.com

REL=(present value – reference value)

Reference value

Functional description

Functional description (continued)

Short press, in the REL mode, on

:

Present value – reference value

REL (%) =

Reference value

Reference value

x100

A long press on the key
erases the reference value.

De-activation

By a long press on the key.

Find Quality Products Online at: [e-mail]

24 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Functional description

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

:

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 25

www.GlobalTestSupply.com

Functional description

Functional description (continued)

Serial operation of the keys of the switch

MTX 3290

Press 1 Press 2 Press 3 Press 4 Press 5

V V V V V …3

Short
press

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

MTX 3291

Frequency Frequency Frequency Frequency Frequency …3

Press 1 Press 2 Press 3 Press 4 Press 5 Press 6

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

Short
press

 Continuity Diode  Continuity Diode …3

Frequency

Find Quality Products Online at: [e-mail]

26 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

- Pos. duty
cycle

- Neg. duty
cycle

- Width of

pos. pulse

- Width of

neg. pulse

Frequency …3

Functional description

Functional description (continued)

Functions of the switch and keys

To access the

, , ,
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:

,

,

,

, ,dBm,

Type of measurement

Voltage VLowZ

Voltage V

Voltage V

Current A

AC, AAC+DC

AC

AC+DC

Voltage VDC
Current A

DC

Voltage 60mVDC

Voltage 60mVAC

Voltage 60mV

AC+DC

Temperature

Ohmmeter

Capacitance

MAX/MIN/

AVG

PEAK ±

9 9 9

9

9

-

-

9 9 9

9

9

9

-

-

-

RANGE

ΔREL

Auto. Manu.

in ΔREL

only

9 9 9

9 9

in ΔREL

only

9

-

-

9 9 9

9 9

9 9

9 9 9

9

-

9

9 9 9 9

in ΔREL

only

9

9

9 9

9 9

HOLD

-

-

-

-

-

Frequency

Period (1/F)

Continuity

Diode

dBm

W

Duty cycle
(DC+, DC-)

Pulse duration

(Pw+, Pw-)

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 27

9

9

- -

- -

- -

- -

- -

- -

www.GlobalTestSupply.com

-

-

9 9

9

- -

- -

- -

- -

- -

- -

-

9

9

9

9

9

9

9

-

-

9 9

9 9

- - -

-

-

-

-

-

9

9

9

9

9

-

-

-

-

-

How are the various quantities measured?

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

superposed on a DC voltage, or DC voltage measurement at high
impedance.

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).

AC voltage measurement, or measurement of an AC voltage

:

This position is provided to allow measurements in electrical

:

1. Press:

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”.

or .

* 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.

Find Quality Products Online at: [e-mail]

28 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

How are the various quantities measured?

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
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”.

.

. Depending

* 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.

nd

6. As default, the 2

* 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.

display unit indicates the frequency, except in DC.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 29

www.GlobalTestSupply.com

How are the various quantities measured?

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" (
direct reading of the current.

5. Place the clamp around the conductor:

Clamp, V

.

) to have a

7. Read the measurement value indicated on the display unit. The
measurement accuracy is indicated in "Technical characteristics",

§. "Clamp" p. 46.

nd

8. As default, the 2

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.

Find Quality Products Online at: [e-mail]

30 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

How are the various quantities measured?

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.

4. Resistance measurement

5. Press

• positive duty cycle (DC+)

• negative duty cycle (DC-)

• positive pulse duration (Pw+)

• negative pulse duration (Pw-)

several times to obtain (MTX 3291 only):

* It is possible to activate the filter in AAC+DC, AAC. The cutoff

frequency of the filter is ≤300Hz.

1. Press the

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.

button of the switch.

* 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.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 31

www.GlobalTestSupply.com

How are the various quantities measured?

How are the various quantities measured? (continued)

5. Audible continuity measurement

1. Press:

.

6. Diode test

2. Press

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.

again; the "♪" symbol is displayed.

* 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.

1. Press:

2. Press two times

3. Connect the black lead to the “COM” terminal and the red lead to “V”.

.

; the " " symbol is displayed.

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.

Find Quality Products Online at: [e-mail]

32 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

How are the various quantities measured?

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.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 33

www.GlobalTestSupply.com

How are the various quantities measured?

How are the various quantities measured? (continued)

8. Temperature measurement

1. Press:

.

2. Press

3. Press

display units.

to select the type of probe: Pt100 or Pt1000

to switch the temperature unit (°C or °F) between the two

* 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:

sensor

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.

Find Quality Products Online at: [e-mail]

34 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

How are the various quantities measured?

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.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 35

www.GlobalTestSupply.com

How are the various quantities measured?

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

)

Find Quality Products Online at: [e-mail]

36 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

How are the various quantities measured?

How are the various quantities measured? (continued)

10. Resistive power
(MTX 3291 only)

1. Press

three times.

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”.

4. Place the probes tips on the terminals of the resistive load:

5. As default, the main display unit indicates the power in W delivered to a

600 Ω resistive load (U²/600).

For a load

≠ 600

Ω

How to measure the

resistance

1. Start by applying power to the load.

2. Press

3. Press

power.

4. Press

5. 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.

6. Apply power to the load.

7. Read the measurement value indicated on the display unit:

- the main display unit indicates the power in W (U

- the secondary display unit indicates the resistance measured on the
installation (600 Ohm by default).

. The display unit indicates the resistance.

to store the resistance, which will be used to calculate the

three times.

2

/R)

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 37

www.GlobalTestSupply.com

How are the various quantities measured?

How are the various quantities measured? (continued)

11. dBm decibels in power (MTX3291, only)

1. Press:

.

2. Press

3. Press

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.

again.

to select the reference resistance, 50, 75, 90, or 600 Ohm.

* Connect the instrument as for a voltage measurement.

Reminder

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).

R 0dBm (VRef) en

50 Ω

75 Ω

223.6mV

273.86mV

90 Ω

600 Ω

XdBm =

300mV

774.6mV

Vmeasured
20 Log

VRef

Find Quality Products Online at: [e-mail]

38 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

SX-DMM software

SX-DMM software

SX-DMM: Processing software

Connection of the

isolated USB optical

lead supplied

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).

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.

Install the USB driver on your PC (see the data sheet on the CD provided).

2.

USB

Isolated optical connector

Interface cable

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.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 39

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

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

600mV 0 to 600.0mV 0.1mV 0.6% L+2D 10.9M

6V 0 to 6.000V 0.001V

60V 0 to 60.00V 0.01V 10.082M

600V (∗)

(∗) The display indicates "+OL" above +620V and "-OL" above - 620V. Protection:
850Vpk

Specified

measurement range

0 to 600.0V 0.1V 10.008M

Resolution

Intrinsic error Input impedance

0.3% L+2D

10.9M

Secondary measurements and displays: MAX, MIN, AVG

AC and AC+DC voltages

VAC RMS Protection: 850Vpk

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.

Range

600mV

6V

60V

600V 2)

1) See the typical curve of the 300Hz filter.

2) The LCD indicates "+OL" above +620V, "-OL" below -620V or above 620VRMS.

Operating

range

0 to

600.0mV

0 to

6.000V

0 to

60.00V

0 to

600.0V

Specified

easurement

range 3)

60.0 to

600.0mV

0.600 to

6.000V

6.00 to

60.00V

60.0 to

600.0V

Resolution

0.1mV

0.001V

0.01V 10.082 M

0.1V 10.008 M

Uncertainty

(±)

2% L+

0.25%x

[F(kHz)-1]L

±5D

2% L+

0.18%x

[F(kHz)-1]L

±3D

Additional

uncertainty F

(Hz) 1)

45<F<65Hz

0.3% L
typ.

at 100Hz

0 .7% L

typ.

at 150Hz

1.8% L
typ.

at 300Hz

30% L

typ.

Pass
band

10Hz to

20kHz

10Hz to

20kHz

@ 1kHz

Input

impedance

// <50 pF

10.9 M

10.9 M

Peak

factor

3 to

500mV

3 to 5V

3 to 50V

3 to

500V

3) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG,
PEAK

Find Quality Products Online at: [e-mail]

40 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

m

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

6V

60V

600V 2)

0 to

600.0mV

0 to

6.000V

0 to

60.00V

0 to

600.0V

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

LowZ AC Protection: 850Vpk

V

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

60.0 to

600.0mV

0.600 to

6.000V

6.00 to

60.00V

60.0 to

600.0V

2% L

0.1mV

0.001V

0.01V 10.082M

0.1V 10.008M

Specified

easurement

range 3)

0.8% L
±10D

Resolution

+ 0.18%x

[F(kHz)-1]L

±5D

2% L

+ 0.18%x

[F(kHz)-1]L

±3D

Uncertainty (±)

45<F<65Hz

0.3% L
typ.

at 100Hz

0 .7% L

typ.

at 150Hz

1.8% L
typ.

at 300Hz

30% L

typ.

Additional

uncertainty F

(Hz) 1)

10Hz

to

20kHz

10Hz

to

20kHz

Input

impedance

//<50 pF

10.9M

10.9M

3 to

500mV

3 to

5V

3 to
50V

3 to

500V

Peak

factor

600mV

6V 0 to 6.000V

60V 0 to 60.00V

600V 2) 0 to 600.0V

0 to

600.0mV

60.0 to

600.0mV

0.600 to

6.000V

6.00 to

60.00V

60.0 to

600.0V

2 .2% L+

0.1mV

0.001V

0.01V

0.1V 3 to 500V

0.25%x

[F(kHz)-1]L

±5D

2 .2% L+

0.18%x

[F(kHz)-1]L

±3D

45<F<65Hz

0.3% L typ.

at 100Hz

0.7% L typ.

at 150Hz

1.8% L typ.

at 300Hz

30% L typ.

3 to

500mV

3 to 5V

≅300k

3 to 50V

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

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 41

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

t

Technical characteristics of the MTX 3290 (continued)

Currents

DC current

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).

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

6mA 0 to 6.000mA 0.002 to

60mA 0 to 60.00mA

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

(∗)

Operating

range

0 to 20.00A 0.20 to 20.00A 0.01A 1.2% L ± 2D

Specified

measurement

range

6.000mA

.02 to 60.00mA 0.01mA 1.2% L ± 2D 3mV/mA

Resolution

1µA 1.2% L ± 5D

Uncertainty

(±)

Voltage

drop

25mV/mA

0.05V/A

Protection

Fuse

10A/600V

>50kA

AAC RMS current

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

Range

6mA

60mA

600mA

6A

10A/20A

(∗)

The display indicates "OL" above 19.99A. The symbol blinks and a beep

Operating

range

0 to

6.000mA

0 to

60.00mA

0 to

600.0mA

0 to

6.000A

0 to

20.00A

Specified

easuremen

range

0.600 to

6.000mA

6.00 to

60.00mA

60.0 to

600.0mA

0.600 to

6.000A

1.00 to

10.00A

Resolution

1µA 1.7% L ± 5D

0.01mA

0.1mA

0.001A 1.7% L ± 5D 2.8 to 5A 0.05V/mA

0.01A 1.5% L ± 3D 3.7 to 8A 0.05V/mA

Uncertainty (±)
40Hz to 20kHz

(**)

1.5% L ± 3D

Peak factor

2.6 to
5mA

2.6 to

50mA

2.6 to

500mA

Voltage

drop

25mV/mA

3mV/mA

0.58mV/mA

Protection

Fuse

10A/600V

>50kA

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.

Find Quality Products Online at: [e-mail]

42 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

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

60mA

600mA

6A

10A

/20A*

The display indicates “OL” above 19.99A. The symbol blinks and a beep

0 to

6.000mA

0 to

60.00mA

0 to

600.0mA

0 to

6.000A

0 to

20.00A

0.060 to

6.000mA

6.00 to

60.00mA

60.0 to

600.0mA

0.600A to

6.000A

0.60A to

20.00A

0.01mA

0.1mA

0.001A

0.01A

1µA

1.7% L +[0.08%x
(FkHz-1)] L

±5D

1.5% L +[0.08%x
(FkHz-1)] L

±3D

1.7% L+[0.08%x
(FkHz-1)] L

±5D

1.5% L+ [0.08%x
(FkHz-1)] L

±3D

±15D

±13D

±10D 2.8 to 5A 0.05V/mA

±10D 3.7 to 8A 0.05V/mA

2.6 to
5mA

2.6 to

50mA

2.6 to

500mA

25mV/mA

3mV/mA

0.58mV/mA

Fuse

10A/600V

>50kA

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.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 43

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

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

60Hz 10.00 to 60.00Hz 10.00 to 60.00Hz 0.01Hz

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

Specified

measurement

range

Resolution Intrinsic error

0.1% L ±1D

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
“-----“.

Find Quality Products Online at: [e-mail]

44 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

Technical characteristics of the MTX 3290 (continued)

Resistance

Ohmmeter In this setting, the user can measure a resistance.

Capacitance

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

600

6k 0 to 6.000k 0.001k

60k 0 to 60.00k 0.01k  12.6A

600k 0 to 600.0k 0.1k  1.26A

6M 0 to 6.000M 0.001M 1.5% L ±3D  240nA

60MΩ

Specified

measurement

range

0 to 600.0 ∗

0 to 60.00M

Resolution Uncertainty

0.1 0.5% L ±2D  850µA

0.5% L ±2D

0.01M 3% L ±3D  29nA

Measurement

current

 126.6A

(∗) REL measurements

Open-circuit

voltage

<5V

Capacitance

meter

In this setting, the user can measure the capacitance of a capacitor.

Range

6nF

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

Operating

range

0.100 to

6.000nF

Specified

measurement

range

0.100 to

6.000nF

Resolution

0.001nF 2.5% L ±30D  1.26µA  400ms

Intrinsic

error

Measurement

current

Measurement

The use of wires that are very short and shielded is strongly recommended.

time

Protection: 850Vpk

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 45

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

Technical characteristics of the MTX 3290 (continued)

Diode Test

Audible continuity

Clamp

DC current

Range Resolution Accuracy Open-circuit voltage

3V 1mV 2% L ±3D <5V <1.1mA

Measurement

current

Audible signal triggered if <40mV ±10mV
Protection: 850Vpk

Range Resolution Accuracy

600 0.1 0.5% L ±3D <5V <1.1mA 850Vpk

Open-circuit

voltage

Measurement

current

Protection

Response time <100ms
Triggering threshold: <30 ±5
Protection: 850Vpk

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.

Range
Ratio

1mV/A

10mV/A

100mV/A

1000mV/A

600mA 6A 60A 600A 6000A

Resolution

Accuracy 0.6%L ±2D 0.6%L ±2D 0.3%L ±2D

Resolution

Accuracy 0.6%L ±2D 0.6%L ±2D 0.3%L ±2D

Resolution 0.1mA 0.001A 0.01A

Accuracy 0.6%L ±2D 0.6%L ±2D 0.3%L ±2D

Resolution 0.1mA 0.001A

Accuracy 0.6%L ±2D 0.3%L ±2D

0.001A 0.01A 0.1A

0.01A 0.1A 1A

Secondary measurements and displays: MAX, MIN, AVG and transformation ratio of
the sensor

AAC RMS current

Range
Ratio

1mV/A

10mV/A

100mV/A

1000mV/A

600mA 6A 60A 600A 6000A

Resolution

Accuracy

Resolution

Accuracy

Resolution 0.1mA 0.001A 0.01A

Accuracy

Resolution 0.1mA 0.001A

Accuracy 2% L ±5D 2% L ±3D

Peak factor 3 @ 500mA @ 5A @ 50A @ 500A @ 5000A

2% L ±5D (∗)

0.001A 0.01A 0.1A

2% L ±5D (∗)

2% L ±5D 2% L ±3D

0.01A 0.1A 1A

2% L ±5D (∗)

2% L ±5D 2% L ±3D

2% L ±5D 2% L ±3D

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.

Find Quality Products Online at: [e-mail]

46 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

Technical characteristics of the MTX 3290 (continued)

AAC+DC TRMS current

Range
Ratio

1mV/A

10mV/A

100mV/A

1000mV/A

600mA 6A 60A 600A 6000A

Resolution

Accuracy

Resolution

Accuracy

Resolution 0.1mA 0.001A 0.01A

Accuracy

Resolution 0.1mA 0.001A

Accuracy

Peak factor 3 @ 500mA @ 5A @ 50A @ 500A @ 5000A

2.8% L ±15D
(∗)

2.8% L ±15D 2.8% L ±13D

0.001A 0.01A 0.1A

2.8% L ±15D
(∗)

2.8% L ±15D 2.8% L ±13D

0.01A 0.1A 1A

2.8% L ±15D
(∗)

2.8% L ±15D 2.8% L ±13D

2.8% L ±15D 2.8% L ±13D

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.

Frequency

response

(∗): see “Frequency response” curve, below.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 47

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

Technical characteristics of the MTX 3290 (continued)

Temperature

Pt100/Pt1000

Peak

SURV

MIN, MAX, AVG

The user can measure the temperature by means of a Pt100/Pt1000 sensor.

Range Measurement current Resolution Accuracy Protection

- 125°C to

+ 75°C

- 200°C to

+ 800°C

<1mA (Pt100)

<0.1mA (Pt1000)

<1mA (Pt100)

<0.1mA (Pt1000)

0.1°C

---

0.1°C

---

± 0.5°C

850Vpk

0.1% L ± 1°C

0.07% L ± 1°C

"Active" protection by PTC thermistor
Display in °C/°F possible

Add 1% L ± 30 D to obtain the accuracy corresponding to the function and the
range.

Fmax 1kHz (1ms)
Protection 850Vpk

θ

T

θ=1ms mini

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

Beep reporting an invalid key

Successive beeps reporting an overshoot of the danger
threshold (alarm)

Successive beeps reporting recording of the MAX, MIN, PEAK

Successive beeps (alarm) Æ current >10A

Continuity measurement

High-pitched
sound

Low-pitched
sound

High-pitched
sound

High-pitched
sound

High-pitched
sound

Medium­pitched sound

Find Quality Products Online at: [e-mail]

48 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3290

Technical characteristics of the MTX 3290 (continued)

Variation in the nominal range of use

Quantity of

influence

Battery

voltage

Temperature

Humidity

(without

condensation)

Common mode

Range of
influence

4V to 6V all

VACmV, V

VAC, VAC+DC,V

AAC and AAC+DC 0.08% L ±0.1D/1°C 0.12% L ±0.1D/1°C

-10°C… 18
28 ... 55°C

Stabilization time

10% ... 80% RH

600V
50Hz

VAC, VAC+DC, V

Quantity

influenced

VDCmV 0.02% L ±0.2D/1°C 0.04% L ±0.25D/1°C

mV 0.08% L ±0.2D/1°C 0.15% L ±0.25D/1°C

LowZ

VDC 0.01% L ±0.1D/1°C 0.05% L ±0.1D/1°C

0.25% L ±0.1D/1°C

LowZ

ADC 0.05% L ±0.1D/1°C 0.1% L ±0.1D/1°C

Ω

60 MΩ

µF 0.2% L ±0.1D/1°C

mF 0.6% L ±0.1D/1°C

Hz 0.01% L/1°C

Temperature

V
A

Ω

Hz

LowZ

typical MAX

< 3D

0.01% L ±0.1D/1°C 0.1% L/1°C

0.05% L/1°C 0.1% L/1°C

≈ 2 h

Range typical
60mV,

600mV

6V >60dB

60V,

600V,

1000V

Influence

0.2% L+1D

0.3% L/1°C

± 2°C+0.05% L/1°C

2.5 h

0 0

>35dB

>95dB

Response of the 300Hz filter

-10,00

-20,00

-30,00

Atténuation (%)

-40,00

-50,00

-60,00

Fr

equency (Hz)

0 50 100 150 200 250 300 350 400 450

0,00

Attenuation (%)

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 49

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

V

Technical characteristics of the MTX 3291

“n%L + nD” means

“n% of the reading

(see CEI 485)

DC voltage

Accuracy:

+ n Digit”

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.

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

60mV 1) 0 to 60.000mV 0.001mV 0.5% L+35D

600mV 0 to 600.00mV 0.01mV 0.5% L+25D

6V 0 to 6.0000V 0.0001V

60V 0 to 60.000V 0.001V

600V 0 to 600.00V 0.01V

Specified

measurement range

Resolution Intrinsic error

0.05% L+25D

Input impedance

10.612M

10.9M

10.9M

10.082M

10.008M

AC and AC+DC voltages

VAC RMS

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

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.

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

2)

3)

Operating

60.000mV

600.00mV

6.0000V

60.000V

1000.0V

Range

60mV

600mV

6V

60V

600V 0 to 600.00

1000V

range

0 to

0 to

0 to

0 to

0 to

Specified

measurem.

range 4)

6.000 to

60.000mV

60.00 to

600.00mV

0.6 to

6.0000V

6.000 to

60.000V

60.00 to

600.00V

60 to

1000.0V

Resolution

0.001mV

0.01mV

0.0001V

0.001V 10.082 M

0.01V 10.008 M

0.1V 10.008 M

Uncertainty (±)

1.5% L
± 35D

L

1%

+ 0.25%x

[F(kHz)-1] L

± 30D

0.5% L

+ 0.18%x

[F(kHz)-1] L

± 25D

Additional

uncertainty

F(Hz) 1)

45<F<65Hz

0.3% L typ.

at 100Hz

0.7% L typ.

at 150Hz

1.8% L typ.

at 300Hz

30% L typ.

Pass band

 400Hz 10.612 M

10Hz to

50kHz

( 23%

@100kHz)

10Hz to
100kHz

@ 1kHz

Input

impedance

//<50 pF

10.9 M

10.9 M

1000.0V

Peak

factor

3 to

50.0mV

3 to

500.0mV

3 to

5.0V

3 to

50.0V

3 to

500.0V

1.42 to

Find Quality Products Online at: [e-mail]

50 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

6

Technical characteristics of the MTX 3291 (continued)

AC RMS

V

(continued)

VLowZ AC RMS

Protection: 1414 Vpk

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

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.

Range

600mV

6V

60V

600V 0 to 600.00V

Operating

range

0 to

600.00mV

0 to

6.0000V

0 to

60.000V

Specified

measurement

range 3)

60.00 to

600.00mV

0.6 to

6.0000V

6.000 to

60.000V

60.00 to

600.00V

Resolution

0.01mV

0.0001V

0.001V 3 to 50.0V

0.01V 3 to 500.0V

Uncertainty (±)

1% L+ 0.25%x

[F(kHz)-1] L

± 30D

0.5% L+

0.18%x

[F(kHz) -1] L

± 25D

Additional

uncertainty

F(Hz) 1)

45<F<65Hz

0.3% L typ.

at 100Hz

0.7% L typ.

at 150Hz

1.8% L typ.

at 300Hz

30% L typ.

Pass band

≅ 300 k

Input

impedance

//<50 pF

3 to

500.0mV

3 to 5.0V

VAC+DC TRMS

Protection: 1414 Vpk

2)

1000V

1) See the typical curve of the 300Hz.

2) The LCD indicates “+OL” above +1050V, “-OL” below -1050V or above 1050VRMS.

0 to

1000.0V

60 to

1000.0V

0.1V

1.42 to

1000.0V

3) From 1kHz, the measurement must exceed 15% of the range.
Secondary measurements and displays: FREQ (AC coupling), MAX, MIN, AVG, PEAK

60mV range: Measuring a strong current or measuring a current for a long time may cause a
temperature rise of some components.

Range

60mV 2)

600mV

6V

60V

600V

Operating

range

0 to

60.000mV

0 to

00.00mV

0 to

6.0000V

0 to

60.000V

0 to

600.00V

Specified

measurem.

range 4)

6.000 to

60.000mV

60.00 to

600.00mV

0.6 to

6.0000V

6.000 to

60.000V

60.00 to

600.00V

Resolution

0.001mV

0.01mV

0.0001V

0.001V

0.01V

Additional

uncertainty

DC (±)

± 15D

Uncertainty

AC (±)

1.5% L
±35D

0.8% L

+ 0.18%x

[F(kHz)-1] L

±30D

0.5% L

+ 0.18%x

[F(kHz)-1] L

±25D

Additional

uncertainty

F(Hz) 1)

45<F<65Hz

0.3% L typ.

at 100Hz

0.7% L typ.

at 150Hz

1.8% L typ.

at 300Hz

30% L typ.

Pass band

≈ 400Hz

10Hz to

50kHz

10Hz to
100kHz

Input

impedance

//<50 pF

10.612 M

10.9 M

10.9 M

10.082 M

10.008M

Peak factor

500mV

3 to 5V

3 to

50mV

3 to

3 to

50V

3 to

500V

0 to

3)

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

1000.0V

60 to

1000.0V

0.1V

10.008 M

1.42 to
1000V

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

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 51

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

Technical characteristics of the MTX 3291 (continued)

Currents

DC current

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).

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

600µA

6mA

60mA

600mA

Operating

range

0 to

600.00µA

0 to

6000.0mA

0 to

60.000mA

0 to

600.00mA

Specified

measurement

range

0.02 to

600.00µA

0.002 to

6.0000mA

0.020 to

60.000mA

0.20 to

600.00mA

Resolution

0.01µA 1% L ±25D 10mV/mA

0.1µA 0.8% L ±25D 25mV/mA

0.001mA 0.8% L ±20D 3mV/mA

0.01mA 0.8% L ±20D 0.58mV/mA

Uncertainty

(±)

Voltage drop Protection

Fuse

11A/1000V

>20kA

6A

10A/20A

(∗)

The display indicates “OL” above 19.99A. The

0 to

6.0000A

0 to

20.000A

0.2000 to

6.0000A

0.200 to

20.000A

0.0001A 0.8% L ±20D 0.05V/A

0.001A 0.8% L ±20D 0.05V/A

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

Find Quality Products Online at: [e-mail]

52 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

K

Technical characteristics of the MTX 3291 (continued)

AAC RMS current

Range Operating range

600µA

6.000mA

60mA

600mA

6A

10A/20A

(∗)

The display indicates “OL” above 19.99A. The

0 to

600.00µA

0 to

6.0000mA

0 to

60.000mA

0 to

600.00mA

0 to

6.0000A

0 to

20.000A

Specified

measurement

range

60 to

600.00µA

0.6000 to

6.0000mA

6.000 to

60.000mA

60.00 to

600.00mA

0.6000 to

6.000A

1.000 to

20.000A

Resolution

0.01µA

0.1µA

0.001mA

0.01mA

0.0001A

0.001A

Uncertainty (±)
40Hz to 20kHz

(**)

1.5% L
±30D

1.2% L+[0.08%
x (FkHz-1)] L

±25D

1% L+[0.08%

x (FkHz-1)] L

±25D

1% L +[0.1%
x (FkHz-1)] L

±25D

1.2% L+ [0.1%
x (FkHz-1)] L

±25D

symbol blinks and a beep

Peak factor

2.6 to

500µA

2.6 to
5mA

2.6 to

50mA

2.6 to

500mA

Voltage

drop

10mV/µA

25mV/mA

3mV/mA

0.58mV/mA

2.8 to 5A 0.05V/mA

3.7 to 8A 0.05V/mA

Protection

Fuse

/1000V

>20kA

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.

11A

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

600µA

6mA

60mA

600mA

6A

10A/20A

The display indicates “OL” above 19.99A. The

(∗)

Operating

range

0 to

600.00µA

0 to

6.0000µA

0 to

60.00mA
0 to

600.00mA

0 to

6.0000A

0 to

20.00A

Specified

measurement

range

60 to

600.00µA

0.6000 to

6.0000mA

6.000 to

60.000mA

60.00 to

600.00mA

0.6000 to

6.000A

0.600 to

20.000A

Resolution

0.01µA

0.1µA

0.001mA

0.01mA

0.0001A

0.001A

Uncertainty (±)
40Hz to 20kHz

(**)

1.5% L
±20D

1% L +[0.08% x

(FkHz - 1)]L

±25D

1% L +[0.08%x

(FkHz - 1)]L

±25D

1% L+[0.1%x

(FkHz-1)]L

±25D

1.2% L+ [0.1%x
(FkHz-1)]L

±25D

Peak

factor

Voltage

drop

±20D

±15D

2.6 to

500µA

2.6 to 5mA 25mV /mA

2.6 to
50mA

2.6 to

500mA

2.8 to 5A 0.05V /mA

3.7 to 8A 0.05V /mA

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
(∗∗) Additional uncertainty with the 300Hz filter.

Protection Range

10mV/µA

3mV/mA

0.58mV/m
A

Fuse

11A/1000

V

>20kA

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 53

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

Technical characteristics of the MTX 3291 (continued)

Frequency

Main frequency

measurement

Secondary

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

60Hz 10.00 to 60.00Hz 10.00 to 60.00Hz 0.01Hz

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

Specified

measurement

range

Resolution Intrinsic error

0.1% L ±1D

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.

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

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
“-----“.

: 150mV <U <600V

Find Quality Products Online at: [e-mail]

54 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

(∗)

t

Technical characteristics of the MTX 3291 (continued)

Resistance

Ohmmeter In this setting, the user can measure a resistance.

Capacity

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

600

6k 0 to 6.0000k 0.0001k

60k 0 to 60.000k 0.001k  12.6A

600k 0 to 600.00k 0.01k  1.26A

6M 0 to 6.0000M 0.0001M 1.5% L ±30D  240nA

60MΩ 0 to 60.000MΩ

Specified

measurement

range

0 to 600.00 (∗)

Resolution Uncertainty

0.01 0.2% L ±20D  1mA

0.2% L ±20D

0.001M 3% L ±30D  29nA

Measurement

current

 126.6A

REL measurements

Open-circuit

voltage

<5V

Capacitance meter In this setting, the user can measure the capacitance of a capacitor.

Range

6nF 0.100 to 6.000nF 0.100 to 6.000nF0.001nF 2% L ±30D

60nF 0 to 60.00nF 0 to 60.00nF 0.01nF 1% L ±8D

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.

Operating

range

Specified

measurement

range

Resolution

Intrinsic

error

Measurement

current

 1.26µA

 1.26µA

Protection: 1414 Vpk

Measuremen

time

 400ms

 400ms

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 55

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

Technical characteristics of the MTX 3291 (continued)

Diode test

Range Resolution Accuracy Open-circuit voltage

3V 0.1mV 1% L ±30D <5V <1.1mA

Audible signal triggered if <40mV ±10mV

Protection: 1414 Vpk

Audible continuity

Range Resolution Accuracy

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.

Open-circuit

voltage

Measurement

current

Measurement

current

Protection

* Add the error of the clamp to the intrinsic error of the multimeter, specified

in the tables below.

DC current

Range
Ratio

1mV/A

10mV/A

100mV/A

1000mV/A

600mA 6A 60A 600A 6000A

Resolution

Accuracy 0.5% L ±2D 0.5% L ±2D 0.05% L ±2D

Resolution 0.001A 0.01A 0.1A

Accuracy

Resolution 0.1mA 0.001A 0.01A

Accuracy 0.5% L ±2D 0.5% L ±2D 0.05% L ±2D

Resolution

Accuracy 0.5% L ±2D 0.05% L ±2D

Secondary measurements and displays: MAX, MIN, AVG and transformation ratio
of the sensor

0.5% L ±2D 0.5% L ±2D 0.05% L ±2D

0.1mA 0.001A

0.01A 0.1A 1A

Find Quality Products Online at: [e-mail]

56 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

Technical characteristics of the MTX 3291 (continued)

AAC RMS current

Range
Ratio

1mV/A

10mV/A

100mV/A

1000mV/A

600mA 6A 60A 600A 6000A

Resolution

Accuracy

Resolution

Accuracy

Resolution 0.1mA 0.001A 0.01A

Accuracy

Resolution 0.1mA 0.001A

Accuracy

1.5% L ±5D

(BW  400Hz)

1% L+0.25%

x [F(kHz)-1] L

±5D

(BW: 10Hz to

50kHz)

0.001A 0.01A 0.1A

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)

0.01A 0.1A 1A

0.5% L+0.18%
x [F(kHz)-1] L

(BW: 10Hz to

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)

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 @ 500mA @ 5A @ 50A @ 500A @ 5000A

From 1kHz, the measurement must exceed 15% of the range

Secondary measurements and displays: MAX, MIN, AVG and transformation
ratio of the sensor

±3D

100kHz)

AAC+DC TRMS

current

300Hz filter: if the filter is active, see “300Hz filter” curve for the additional
uncertainty.

Range
Ratio

1mV/A

10mV/A

100mV/A

1000mV/A

600mA 6A 60A 600A 6000A

Resolution

Accuracy

Resolution

Accuracy

Resolution 0.1mA 0.001A 0.01A

Accuracy

Resolution 0.1mA 0.001A

Accuracy

1.5% L ±5D

(BW  400Hz)

0.8% L+0.18%
x [F(kHz) -1] L

±15D

(BW: 10Hz to

50kHz)

0.001A 0.01A 0.1A

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

0.01A 0.1A 1A

0.8% L+0.18%

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

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 @ 500mA @ 5A @ 50A @ 500A @ 5000A

0.5% L+0.18%
x [F(kHz) -1] L

±13D

(BW: 10Hz to

100kHz)

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.

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 57

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

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

"Active" protection by PTC thermistor
Display in °C/°F possible

Peak

SURV

MIN, MAX, AVG

Resistive power

Duty cycle

-200°C to

+800°C

<1mA (Pt100)

<0.1mA (Pt1000)

0.1°C

0.1% L ±1°C

1414 Vpk

Add 1% L + 30 D to obtain the accuracy corresponding to the function and the
range.

Fmax 1kHz (1ms)
Protection 1414 Vpk

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

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
Max. measurement voltage 1000V

AC+DC

AC (in %)

Protection 1414 Vpk
Unit of display W

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%

θ

T

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

Find Quality Products Online at: [e-mail]

58 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

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

Beep reporting an invalid key

High-pitched
sound

Low-pitched
sound

Successive beeps reporting an overshoot of the danger
threshold (alarm)

Successive beeps reporting recording of the MAX, MIN, PEAK

Successive beeps (alarm) Æ current >10A

Continuity measurement

High-pitched
sound

High-pitched
sound

High-pitched
sound

Medium­pitched sound

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 59

www.GlobalTestSupply.com

Technical characteristics of the MTX 3291

Technical characteristics of the MTX 3291 (continued)

Variation in the nominal range of use

Response of the 300Hz filter

Quantity of

influence

Batt. voltage 4V to 6V all

Temperature

Humidity

(without

condensation)

EMC

(immunity to the

radiated field)

Common mode

0 50 100 150 200 250 300 350 400 450

0,00

Range of
influence

-10°C… 18

28 ... 55°C

10%... 80% RH

300MHz...

500MHz

300MHz...

500MHz

1000V

50Hz

Quantity influenced

VDCmV 0.02% L ±0.2D/1°C 0.04% L ±0.25D/1°C

VACmV, V

VAC, VAC+DC,VLowZ 0.25% L ±0.1D/1°C

AAC and AAC+DC 0.08% L ±0.1D/1°C 0.12% L ±0.1D/1°C

60 MΩ

Temp.

Stabilization time

VAC, VAC+DC,V

equency (Hz)

Fr

Influence

typical MAX

<3D

mV 0.08% L ±0.2D/1°C 0.15% L ±0.25D/1°C

LowZ

VDC 0.01% L ±0.1D/1°C 0.05% L ±0.1D/1°C

ADC 0.05% L ±0.1D/1°C 0.1% L ±0.1D/1°C

Ω

µF 0.2% L ±0.1D/1°C

mF 0.6% L ±0.1D/1°C

Hz 0.01% L/1°C

V

A

Ω (*)

Hz



clamp

0.01% L ±0.1D/1°C 0.1% L/1°C

0.05% L/1°C 0.1% L/1°C

0.3% L/1°C

≈ 2h

0 0

Range typical

LowZ

60mV

600mV

6V >60dB

60V

600V

1000V

>35dB

>95dB

0.2% L+1D

± 2°C+0.05% L/1°C

2.5h

600 pts

450 pts

-10,00

-20,00

Erreur (% )

-30,00

Erreur (%)

-40,00

-50,00

-60,00

Find Quality Products Online at: [e-mail]

60 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

General, mechanical charateristics

General characteristics

Environmental conditions

Power supply

Display

Security

CEM

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

The multimeter is powered by primary or rechargeable batteries:

• Batteries, 4x1.5V nominal – LR6, Alkaline

Life in V

MTX3290:  200h
MTX3291:  300h

• Rechargeable batteries, 4x1.2V, A-A, Ni-MH LSD, 2400mAh

Life in V

MTX3290:  140h
MTX3291:  210h

The refresh rate of:

- the display unit is 200ms

- the bargraph is 100ms.

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

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

DC:

DC:

Mechanical characteristics

Housing

Find Quality Products Online at: [e-mail]

6,000- and 60,000-count digital multimeters 61

• Dimensions 196 x 90 x 47.1mm

• Mass 570g

• Materials Polycarbonate (PC)

• Dust- and water-tightness IP67, according to NF EN 60529

www.GlobalTestSupply.com

Supply

Supply

with the
instrument

optional

• 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)

• 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
10Hz to 20kHz

AC



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
DC to 10kHz 1 or 10 P0112006X/P0112007X

Find Quality Products Online at: [e-mail]

62 6,000- and 60,000-count digital multimeters

www.GlobalTestSupply.com

AC/DC