Metrix MTX 3281, MTX 3282, MTX 3283 User guide

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Pôle Test et Mesure CHAUVIN-ARNOUX

Parc des Glaisins

6, avenue du Pré de Challes

F - 74940 ANNECY-LE-

Tel. +33 (0)4.50.64.22.22 - Fax +33 (0)4.50.64.22.00

X02947F00 - Ed. 01 - 09/11

General instructions

Contents

General Instructions ........................................................................................................................................3

Introduction ................................................................................................................................................................. 3

Symbols used on the instrument............................................................................................................................... 3

Precautions and safety measures ............................................................................................................................ 3

Safety features............................................................................................................................................................. 4

Maintenance, metrological verification..................................................................................................................... 4

Warranty....................................................................................................................................................................... 4

Cleaning....................................................................................................................................................................... 4

Measurement input protection systems.................................................................................................................... 5

Special functions......................................................................................................................................................... 5

Description of the instrument .........................................................................................................................6

Front, keyboards (illustration).................................................................................................................................... 6

Rear (illustration, markings)....................................................................................................................................... 6

Measurement terminal block (illustration, markings)..............................................................................................6

Front (description) ...................................................................................................................................................... 7

Inputs ........................................................................................................................................................................... 9

Display.......................................................................................................................................................................... 9

Functional description...................................................................................................................................10

Preparation for use ................................................................................................................................................... 10

Initial settings ............................................................................................................................................................ 14

Specific configurations of the instrument.............................................................................................................. 15

Initialisation of the values ........................................................................................................................................ 16

Access to main functions......................................................................................................................................... 17

Range management .................................................................................................................................................. 18

Display HOLD management HOLD, REL, SURV, SPEC, MEM ............................................................................... 18

Access to secondary functions ............................................................................................................................... 25

MATH Function.......................................................................................................................................................... 27

Favourite function..................................................................................................................................................... 29

SX-DMM Software kit (option).................................................................................................................................. 31

Bluetooth (on –BT version) ...................................................................................................................................... 31

Technical specifications................................................................................................................................33

Voltage measurement............................................................................................................................................... 33

Current measurement............................................................................................................................................... 35

Frequency measurement.......................................................................................................................................... 36

Resistance measurement......................................................................................................................................... 37

Continuity mode........................................................................................................................................................ 37

Test diode .................................................................................................................................................................. 37

Capacitance measurement....................................................................................................................................... 38

Temperature measurement with Pt100 or Pt1000 sensor (MTX 3282, MTX 3283)............................................... 38

Temperature measurement with J or K thermocouple.......................................................................................... 38

dBm measurement.................................................................................................................................................... 38

Positive or negative peak measurement................................................................................................................. 39

Resistive power......................................................................................................................................................... 39

Duty ratio DC+, DC-................................................................................................................................................... 39

Pulse counting CNT+, CNT-...................................................................................................................................... 39

Clock .......................................................................................................................................................................... 40

Influences .................................................................................................................................................................. 40

Multimeter traceability, calibration .......................................................................................................................... 40

General specifications...................................................................................................................................41

Environmental conditions ........................................................................................................................................ 41

Power ......................................................................................................................................................................... 41

Display........................................................................................................................................................................ 41

Safety.......................................................................................................................................................................... 42

CEM ............................................................................................................................................................................ 42

RS232 DB9F and USB optical cables (options)...................................................................................................... 42

Mechanical characteristics............................................................................................................................42

Box ............................................................................................................................................................................. 42

Packaging .................................................................................................................................................................. 42

Supply, accessories.......................................................................................................................................43

Index................................................................................................................................................................44

2 100.000-count Graphical Multimeters

General instructions

Introduction

Symbols used on the instrument

Precautions and safety measures

You have just acquired a 100,000-count graphical multimeter. Thank you for your trust in our products.

It complies with safety standard EN 61010-1, double insulation, relative to electronic measuring instruments.

For optimum service, read this manual carefully and comply with the operating precautions.

Earth terminal Equipment protected throughout by double insulation.

Attention : Risk of electrical shock

•

Read carefully all the notes preceded by the symbol .

•

If you use this instrument in a way which is not specified, the protection

which it provides may be compromised, putting you in danger.

•

The safety of any system incorporating this instrument is the responsibility of

the system assembler.

•

This instrument has been designed for use indoors:

Warning: Risk of danger. Refer to the operating manual to find out the nature of the potential hazards and the action necessary to avoid such hazards.

The rubbish bin with a line through it means that in the European Union, the product must undergo selective disposal for the recycling of electric and electronic material, in compliance with Directive WEEE 2002/96/EC.

- in an environment with pollution level 2,

- at an altitude of less than 2000 m,

- at a temperature between 0° C and 55° C

- with relative humidity of less than 80% up to 31° C.

•

Measurement category III for voltages no higher than 1000 V (AC or DC) in

relation to the earth.

•

Measurement category IV for voltages no higher than 600 V (AC or DC) in

relation to the earth.

Definition of

measurement

Safety features

Maintenance and metrological verification

Warranty

•

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

•

When measuring voltages greater than 60 VDC or 30 VAC, the symbol flashes on the display.

•

Automatic detection of a connection on the "Ampere" terminal.

•

When there is a persistent range overrun, an intermittent buzzer indicates the risk of electric shock.

Any access to the internal circuits for adjustment, servicing or repair of the unit under power must be undertaken only by qualified personnel, after reading the instructions in this manual.

A qualified person is a person who is familiar with the installation, its construction, its use and the hazards that exist. They are authorized to activate and deactivate the installation and equipment, in compliance with the safety instructions.

For all repairs under or outside of the warranty, return the device to your retailer.

This equipment is guaranteed for 3 years against any defect in materials or workmanship, in accordance with the general terms and conditions of sale, .

During this period, the equipment can only be repaired by the manufacturer. The manufacturer reserves the right to carry out repair or replacement of all or part of the equipment. If the equipment is returned to the manufacturer, initial transport costs shall be borne by the customer.

The warranty does not apply in the event of:

•

unsuitable use of the equipment or use with other incompatible equipment

•

modification of the equipment without explicit authorization from the

manufacturer’s technical services

•

repair carried out by a person not certified by the manufacturer

•

adaptation to a specific application, not provided for in the definition of the

equipment or by the operating manual

•

an impact, a fall or flooding.

Unpacking repacking

Cleaning

All the equipment was verified mechanically and electrically before shipping. When you receive it, carry out a quick check to detect any damage that may

have occurred during transport. If necessary, contact our sales department immediately and register any legal reservations with the carrier.

In the event of reshipping, it is preferable to use the original package. Indicate the reasons for the return as clearly as possible in a note attached to the equipment.

•

Turn the instrument off.

•

Clean it with a damp cloth and soap.

•

Never use abrasive products or solvents.

•

Allow to dry before any further use.

4 100.000-count Graphical Multimeters

General instructions

General instructions (cont’d)

Measurement input protection systems

Special functions

Automatic current

measurement

detection

Auto power-off

These multimeters are equipped with several protection systems:

• Varistor protection clips any transient overvoltages on the measurement terminals.

•

PTC (positive temperature coefficient) protection protects against permanent overvoltages less than or equal to 1000 V during capacitance or resistance measurements and diode tests. This protection is reset automatically after the overload.

•

A fuse (11 A) provides protection during intensity measurements.

The number of input terminals is limited to 3: V, COM, A. Connection of the lead to the "Ampere" terminal automatically selects the corresponding function.



When a function modification by the control keyboard is incompatible

with the lead connection, it triggers a buzzer and a visual alarm (LEADS).

The current measurement is performed using autorange over the whole range.

If the function is validated in the Sleep menu: the instrument shuts down automatically after 30 minutes if no action has occurred on the front panel during that time.

The instrument can be powered up again by pressing the key.



Automatic power-off is inhibited in:

•

Surveillance mode (SURV)

•

Memorize mode (MEM)

•

Communication mode (optical link - RS232C, USB, Bluetooth)

•

when the value measured (Voltage or Current) on the multimeter's

inputs exceeds the danger level.

Alert signal

Danger threshold

An intermittent buzzer sounds:

•

on the "Voltage" position, when the range is exceeded (MANUal and

AUTO mode - last range)

•

on the "Current" position, when the range is exceeded (MANUal) mode,

when 10 Amperes or more is measured

•

if the position of the leads and the function selected are incompatible

•

when the danger thresholds are exceeded (function activated)

When the range is exceeded, the buzzer is accompanied by display of "O. L". When this symbol is activated:

•

the voltage on the "Volt" input exceeds 60 VDC or 30 VAC

•

the current injected between the "Ampere" and COM exceeds 10 A

•

the range is exceeded (voltage or current) in MANual mode

100.000-count Graphical Multimeters 5

Description of the instrument

Front panel + keyboards (illustration)

ON/OFF

Key

Keyboards

Display

Jack connector

Terminal strip

Lower casing

Rear (illustration + markings)

Measurement terminal block (illustration + markings)

6 100.000-count Graphical Multimeters

Description of the instrument

8 keys for selecting the

Description of the instrument (cont'd)

Front (description)

1 power on/off key

•

Starting the multimeter.

•

Stopping the multimeter.



If there is a multimeter malfunction, a long press (> 1 s) on this key can be used to return to normal operation.

main functions

Voltage measurement or access to the measurement type: AC, DC or AC+DC

•

Selection using this key or the keys.

•

Validation using the key or after 2 s.

Current measurement or access to the measurement type: AC, DC or AC+DC

•

Selection using this key or the keys.

•

Validation using the key or after 2 s.

Measurement of Frequency (Hz) on a VAC voltage or access to the manual frequency range < 900 kHz (default) or > 900 kHz.

A long press opens the menu for changing the voltage range.

•

Selection using the keys.

•

Validation using the or keys.



Voltage range quick change using the keys.

The selected range is recalled in the help line (i), see page 9.

Measurement of Resistance (Ohm) By pressing again:

•

Access to the Continuity test ( )

•

Access to Diode test ( )

Measurement of Temperature or access to the types of temperature measurements: ° C, ° F or K.

•

Selection using the keys.

•

Validation using the key or after 2 s.

•

By pressing this key during measurement type selection, you can access

the sensor type:

- platinum probes: Pt 100, Pt 1000 only on MTX 3282 and MTX 3283

- thermocouples: J (TC J), K (TC K)

•

Selection using the keys.

•

Validation using the key or after 2 s.

The selected scale is recalled in the help line (i), see page 9.

100.000-count Graphical Multimeters 7

Measurement of Capacitance "Favourite" measurement configurable by the user.

A long press opens the "favourite" function configuration menu.



For the menu's configuration, see §. ☺ Function.

Description of the instrument

6 keys for activating the

Description of the instrument (cont'd)

Instrument Configuration menu. This key can also be used to exit from a menu or submenu after validating it.

3 keys for navigation and

modification of the menus

•

instrument's various modes

•

Selection of the operating mode: AUTO, AUTO PEAK ( MTX 3282, MTX 3283 ), MANU.

•

If the measurement is single range, the range defined is forced and there is no effect if this key is pressed.



By pressing one of the keys, you can switch directly to MANUal mode and then modify the range.

Selection of a menu or function (up/down navigation). Increase or decrease of the variable selected.

Selection of a function (left/right navigation). Modification of a function. Movement within sub-menus.

Selection using this key or the keys. Validation using the key or after 2 s.

Example: Diode test, continuity test and temperature measurement.

2 utility keys

Activation, deactivation of the REL (relative) mode. When it is active, a long press opens a window for setting the reference.

Activation, deactivation of the display of the specifications for the function and range selected.

Activation of HOLD or AUTO HOLD mode, deactivation NO HOLD.

•

Selection using this key or the keys.

•

Validation using the key or after 2 s.

Activation, deactivation of the SURV (surveillance) mode. A long press opens a window for viewing the most recent records. Closed by a short press.

Activation, deactivation of the MEM (automatic recording) mode. A long press opens the MEM Function menu.

Back-lighting of the display in dark environments. A long press opens the menu for adjusting the contrast on the LCD.

Selection of the functions for the 3 secondary displays.

•

Selection by successive presses on this key.

•

A long press can be used to exit from this mode.

100.000-count Graphical Multimeters

Description of the instrument

Recording started

Description of the instrument (cont'd)

Inputs

Display

(foot of the screen)

Graphical display



The graphical

window and the

bargraph constantly

track the evolution of

the measurement in the

range selected.

Input for voltage and frequency measurements, diode tests, resistance measurements, continuity tests, and capacitance or temperature measurements.

Input for current measurements. Reference input.

•

The multimeters in this range are equipped with a graphical LCD screen

(58 mm x 58 mm) with 160 x 160 resolution for comfortable reading.

•

Reading of the LCD can be optimized by varying the orientation of the

display, the adjustment of contrast and, if necessary, using the backlighting.

•

The modes, the functions selected, the electrical or physical values

measured and the alert symbols are clearly shown on the display.

•

The user can call up help (i) regarding the function selected.

•

The main display is accompanied by its sign and the unit.

Depending on the current selections, the display may be graphical or digital: The graphical window can be used to monitor the evolution of the principal

measurement.



Example

AUTO

1.5000

HOLD

Press the main function key …

> 60s

Upper status line

Main display

1 0

Bargraph

Graphical window

Lower status line

Help on function

secondary functions

100.000-count Graphical Multimeters 9

Display of



The main display and the bargraph

constantly track the

evolution of the

measurement.

The secondary displays are intended for the SPEC, REL, MEM, SURV and 888888 functions:



Example

AUTO

V V

1.5000

-10 0 10

MIN

1.0000

MAX

2.5000

AVG

1.3000

SURV

MEM 2

Upper status line

Main display Bargraph

Secondary display 1 Secondary display 2

Secondary display 3 Lower status line

Help on function

Functional description

Preparation for use

Instructions before

activation

Instrument

power supply

Power on

To use this instrument, you must comply with the usual safety rules in order:

- to protect you against the dangers of the electric current,

- to protect the multimeter against incorrect operations.

For your safety, only use the leads delivered with the instrument. Before using it, systematically check that it is in perfect condition.

•

The 3 multimeters in this range operate with three 1.5 V alkaline batteries (LR6-AM3 AA) or three 1.2 V Ni-MH rechargeable batteries (accumulators) of the same type:

 The MTX 3281 is delivered with three 1.5 V alkaline batteries (LR6-AM3 AA). It can operate with accumulators, but does not allow in situ recharging (see §. Accessories delivered as options).

 The MTX 3282 and MTX 3283 multimeters are delivered with three 1.2 V Ni-MH accumulators and charger (12 VDC 7.2 VA) for mains operation whilst simultaneously charging the batteries.

•

When the charger is connected directly to the instrument, the

accumulators can be recharged without removing them from the multimeter.

•

The multimeter can only operate if the accu./batteries are in place.

Using the key opposite.

Charge indicator

A charge status indicator for the batteries or accumulators is constantly shown on the display:

: Batteries or accumulators > 75 % charged : Batteries or accumulators > 25 % charged : minimum charge level < 25 %

The symbol flashes on the display and a buzzer sounds if the power voltage is insufficient (only 30 min charge life). As the specifications will no longer be guaranteed, you must then replace the batteries or recharge the accumulators (see next page).

There can be differences between the display of the charge level (symbol) and the real charge level of the accumulators, according to the quality and the performances of those.

To avoid this risk, we recommend to use same accumulators (HX0051) as those delivered by the manufacturer (see p. 43).

When getting started, the apparatus needs a few seconds to display a correct level of charge (symbol).

10 100.000-count Graphical Multimeters

Functional description

☺

Functional description (cont'd)

Selection of energy type

For correct management of the battery or accumulator charge status indicator, the type of power must be selected:

•

Opening of the Configuration menu with the key.

•

Selection of the "General" function using the keys.

•

Validation of General settings using the key.

Configuration

General settings

General

Measure Func.

Func. MATH

Recharging the

accumulators

•

Selection of Energy Type menu using the keys.

•

Modification of the Energy Type (battery or acc.) using the

•

Validation and exit from the successive menus using the key.

Before carrying out this operation, check that the accumulators are fitted in the instrument ; they do not need to be removed from the multimeter to be recharged. Recharging is only possible if "Accumulator" has been selected in the Energy Type menu (see above).

General

IR baud 9600 Config user

Energy bat.

Accumulator

Energy type

key.

If you try to recharge the accumulators when the batteries are fitted in the multimeter, it could damage it.

For safety reasons, the accumulators should only be loaded at between 0 and 40°C.

✧

100.000-count Graphical Multimeters 11

Caution High internal temperature due to a current measurement may trigger the thermal security mechanism.

Functional description

02600

mAh

Functional description (cont'd)

Recharging the

accumulators

(cont’d)

✧

•

Before carrying out this operation, select the capacity of the accumulators (2600 mAh by default) fitted in the instrument:

•

Selection: Accumulator in the using the keys.

•

Validation: Accumulator using the key, opens a menu for setting the accumulator capacity (in mAh):

•

Selection of the digit to be modified using the key.

•

Modification of the value using the key.

•

Validation of the accumulator capacity and exit from the successive menus using the key .

To maintain the accumulators in good condition, run the accumulators down to the minimum charge level before recharging.

Acc. capacity

Recharging the

accumulators with

multimeter off

•

Then connect the power pack (12 VDC, 7.2 VAC) to the jack connector (see front panel illustration).

•

Connect the power pack (12 VDC, 7.2 VAC) to the mains supply.

The symbol opposite on the display allows you to monitor the charge status. The accumulators are fully charged when the symbol is full .

The MTX 3282 and MTX 3283 multimeters contain Ni-MH accumulators. These accumulators must be disposed of by a recycling firm or a company specialized in the treatment of dangerous waste materials.

Never dispose of these accumulators with other solid waste. For further information, contact your MANUMESURE dealer.



When the multimeter is delivered, the accumulators may be discharged,

requiring a complete recharge.



Do not connect the wall plug when there are disponible batteries in the instrument.

Connection of the wall plug starts recharging the accumulators.

12 100.000-count Graphical Multimeters

The recharging.

Once the accumulators have been fully recharged, the instrument shuts down automatically.

scrolling symbol shows the progress of

Battery charging

Charge level:

75%……..100%

Functional description

fuse

slit for

Functional description (cont'd)

Wall plug

power unit

Recharging totally

discharged

accumulators

or new batteries

"A measurement”

protection fuse

Checking of current

measurement fuse

Use only the charger that is delivered with this device, which is a 2nd generation multimeter. The charger from the previous generation is not compatible.

1. Fit the batteries into the multimeter, then connect the charger.

2. Wait approximately 30 minutes, then press the ON button to switch on the multimeter and follow the progress of the charge.

Average charging period : 7h30 (with 2600 mAh accumulators)

 After one effective hour of recharging, the multimeter can be used for

measurements, by pressing again on the ON button.

A fuse provides protection up to 11 A for current measurements. It must be replaced only with an identical fuse:

11 A, 20 kA, 1000 V, 10 x 38 mm (High Interrupting Capacity). Test the current measurement as follows:

1. Select the Ampere function using the A key.

2. Connect a lead to the A terminal.

3. Check that the LEADS indication disappears from the display (presence of lead). If this is not the case, replace the fuse.

Replacement of the

fuse or the batteries

Dismantling of

multimeter and

access to

battery/fuse

compartment

Before replacing the fuse or batteries, comply with the safety instructions given at the beginning of this manual. Then:

1. Disconnect the test leads from the measurement circuits and the instrument.

2. Disconnect the power lead from the MTX 3282 or MTX 3283 12 VDC power pack.

3. Switch off the power to the instrument.

4. Undo the screw on the back of the instrument.

5. Pivot the rear cover of the casing to access the battery/fuse compartment.

6. Remove the fuse or batteries and replace them with identical models.

7. Replace the cover and retighten the screw.

 Without batteries, the date and time are kept for ca. 1 min in the

instrument.

The measurements recorded are kept for an unlimited time.

batteries

screwdriver

100.000-count Graphical Multimeters 13

Functional description

Language

Functional description (cont'd)

Initial settings

Choice of language

Setting the

date and time

The general menu configures the parameters of the multimeter according to the conditions of use and the user’s preferences.

•

Opening of the Configuration menu with the key.

•

Selection of the General menu using the keys and then the key.

General

Date/Time Beep on

Sleep off

Set language Choix langue

Selection of the language for the multimeter's menus. Two options are available: French (Fr) or English (En, default).

Date and time

08 : 03 : 2005

10 : 03 : 45

•

General

Contrast

Back-light 10 s

Comm. IR

IR baud 9600

Back-light auto-off delay

Selection of the variables using the key. Modification of the value using

Clock validation and start-up when menu is closed using key.

keys.

Activation of the

buzzer (Beep)

Automatic

shutdown (sleep)

Display contrast

Validation (default), or not , of audio signal (beep) when:

- a key is pressed,

- there is a voltage of more than 60 VDC or 30 VAC on the "V" input,

- a stable measurement is acquired in AUTO HOLD mode,

- the power supply voltage (battery) is insufficient.



The audio signal is maintained even when the buzzer is deactivated :

∗

during continuity testing,

∗ when the range is exceeded (voltage or current), ∗ on a 10 A measurement, ∗ if the position of the leads and the function selected are incompatible.

Validation (default), or not, of automatic shutdown (sleep) after 30 min if there has been no action on the multimeter's front panel during that time.

In SURV, MEM and Communication modes, automatic shutdown is not validated. For your safety, automatic shutdown is inhibited when the values measured (voltage, current) on the inputs exceed the danger thresholds (indicator opposite displayed).

Contrast

• Modification of the value (default: 50 %) using the key.

•

Validation of setting using

key.

14 100.000-count Graphical Multimeters



A long press on

directly opens the menu,

validates the setting.

Functional description

Validation of the reference resistance in dBm and exit from the menu using the

00600 ohm

dBm REF

Functional description (cont'd)

Adjustment of

back-lighting

Start-up

configuration

(Config)

Specific configurations of the instrument

Selection of the back-lighting deactivation time to limit the multimeter's energy consumption.

6 times are possible: 10 s, 30 s, 1 min, 2 min, 10 min or infinite (no deactivation).



By default, the back-lighting deactivation time is 2 min.

•

In user mode, the instrument restarts with the user's personal configuration and the main function selected when it was switched off.

•

In basic mode, by default, the multimeter restarts with its elementary configuration and the Volt (AC+DC) function.



Restart configuration indicated without leads connected. If the leads are connected, they will be taken into account for function selection.

Using the Measure menu, you can adapt the instrument's configuration to the measurement environment:



Measure

•

Opening of the Configuration menu

with the key.

Filter yes

•

Selection of the Measure menu using

Impedance 1G

W REF

the

keys and then the key.

Filter activation

Filter

Impedance

dBm REF

MTX 3283

Reminder

Activation of a filter to improve frequency rejection for measurements in low VDC mode.



By default, filter active.

Choice of the required input impedance on the 100 and 1000 mV (1 V) ranges.

- 100 mVDC and

- 1000 mV mVDC range: 2 possible impedances: 1 GΩ or 20 MΩ



By default, 100 mV range = 10 M

Adjustment of the reference resistance value (dBm REF) between 1 Ω and 10,000 Ω, for measurements in dBm on VAC or VAC+VDC voltages:

•

Selection of the digit to be modified using the key.

•

Modification of the value using the keys.

•

key.



Default value 600

A 0 dBm measurement with a 600

of 0.7746

VAC.

AC+DC

range: 2 possible impedances: 1 GΩ or 10 MΩ

ΩΩΩΩ

, 1000 mV range = 20 M

ΩΩΩΩ

Set dBm ref

ΩΩΩΩ

Ω

reference resistance is given on a voltage

100.000-count Graphical Multimeters 15

Functional description

using the

loaded

The language and the active main

☺

Functional description (cont'd)

W REF

MTX 3283

Initialization of the values



Default values

Adjustment of the reference resistance value (W REF) between 1 Ω and 10,000 Ω for resistive power measurements:

The calculation performed is: (voltage measured)2 / W REF (unit W) (current measured)2 ∗ W REF (unit W)

The adjustment procedure is the same as for the dBm reference resistance.



Default value 50

W REF is used to calculate the resistive power (W) with REF = W REF and to calculate the power (V ∗ A) when V (Ref) = W REF

The parameters of the configuration can be reinitialized to the default settings in a single operation:

•

Opening of the Configuration menu with the key.

Configuration

Func. Func. MATH

Func. MEM

Default init

Set default values

Loading of the default values is confirmed by the following message:

Message Default values

General

Measure

Favourite func. MATH func.

MEM func.

Main func.

ΩΩΩΩ

•

Selection of the "Default init" function using the keys.

•

Validation of initialization

key.

Exit from the successive menus using the

key.



function are not modified.

Language : Fr Beep : on Sleep : on Contrast : 50 % Lighting : 2 min Communication : IR IR baud : 9600 Configuration : basic Energy 3281 : battery Energy 3282, 3283 : accu. Accu. capacity : 2600 mAh Communication protocol : MODBUS

Filter : active Impedance : 10 / 20 M dBm REF : 600 Ω W REF : 50 Ω

Function : V Unit : none Coef. A : 1 Coef. B : 0

Recording freq. : 1 s No. of rec. 3281 : 158 No. of rec. 3282, 3283 : 1000

V, A : AUTO, AC+DC Hz : 10 V range Ω, Capacity : AUTO ° C : ° C, Pt 100

16 100.000-count Graphical Multimeters

Functional description

Functional description (cont'd)

Access to main functions

Connection of leads

Functions authorized when connected on the V

ΩΩΩΩ

terminal

The input terminals are limited to 3 : COM, V, Ω, and A. Connect the black lead to the COM socket (for all measurements).

Voltage measurement (Volt). PEAK is displayed when a peak (Pk+ Pk-measurement) of voltage is detected

and when it is higher than the range of active voltage.

Measurement of Frequency (Hz) on a V A 1st press gives access to Resistance measurements (Ohm).

A 2nd press gives access to Continuity measurements ( ). A 3rd press gives access to Diode measurements ( ).

A 1st press gives access to Temperature measurements (according to the last configuration of the function).

A 2nd press gives access to the type of temperature measurement: ° C, ° F, K.

voltage.

Functions

authorized when

connected to the

A terminal

Selection using the

Another press on this key while selecting the measurement type gives access to the type of sensors:

- platinum probes: Pt100 or Pt1000 only on MTX 3282, MTX 3283

- thermocouples: J or K (TC J, TC K)

Selection using the keys, validation using the key or after 2 s.

Measurement of Capacitance. "Favourite" measurement configurable by the user.



For the menu's configuration, see §.

Instrument Configuration menu. When the red lead is connected to the A terminal, it automatically selects

Current (AC + DC) measurement. If current measurement is selected without connection of a lead to terminal A

or without a protection fuse, the LEADS symbol flashes on the display. Current measurement (Ampere)



The current measurement may be performed using autorange

(AUTO PEAK) over the whole scope of the ranges (µA, mA, A).

PEAK is displayed when a peak (Pk+ Pk- measurement) of current is detected and when it is higher than the range of active current.

keys,

validation using the key or after 2 s.

☺

Function.

"Favourite" measurement configurable by the user.



For the menu's configuration, see §.

Instrument Configuration menu.

100.000-count Graphical Multimeters 17

☺

Function.

Functional description

Functional description (cont'd)

Range management

“AUTO” mode

“AUTO PEAK” mode

MTX 3282

MTX 3283

“MANUal” mode

The

- AUTO mode

- AUTO PEAK mode MTX 3282, MTX 3283

- MANU mode

•

Selection using this key or the keys.

•

Validation using the key or after 2 s.

If the measurement is single range, the range defined is forced and there is no effect if the



Example: Diode test, continuity test and temperature measurement.

On the input for a measurement, AUTO mode is active by default and range selection is managed automatically by the multimeter.

In AUTO PEAK mode, the range changes are performed on the basis of rapid acquisition of peaks, either upward or downward.



AUTO PEAK mode is only accessible for AC, AC+DC in V and A

measurements. It prevents untimely overruns of the peak factor specified for the instrument.

When this mode is selected and is valid for the function concerned, the keys can be used to modify the measurement range.

Measurements concerned: voltage, current, resistance, capacitance.

key gives access to three operating modes:

key is pressed.

Display hold management

AUTO HOLD

HOLD



By pressing one of the keys, you can switch directly to MANUal mode and then modify the range.

The key gives access to two operating modes:

- HOLD mode

- AUTO HOLD mode

- NO HOLD deactivates the mode.

•

Selection using this key or the keys.

•

Validation using the key or after 2 s.

HOLD mode freezes on the screen the current main measurement at the time when the key is pressed. The instrument continues to manage the measurements and display them in the graphical window or on the secondary display (REL mode).



The range selection remains unchanged: AUTO or MANUal depending

on the configuration when you enter this mode.

AUTO HOLD mode automatically freezes on the screen the current main measurement whenever a stable measurement is detected. It is confirmed by a beep (unless the configuration "Beep no" has been selected in the Configuration menu).

The values memorized remain displayed until the next stable measurement taken (measurement different from ± 100 digits) or until deactivation of AUTO HOLD mode.

The instrument continues to manage the measurements and display them in the graphical window or on the secondary display (REL mode).



The range selection remains unchanged (AUTO or MANUal) depending

on the configuration when you enter this mode. AUTO HOLD mode is only accessible for V and A measurements.

18 100.000-count Graphical Multimeters

Functional description

+1.0000

Functional description (cont'd)

REL

REL mode takes the current main measurement as its reference. It is indicated on the secondary display: REF.

•

The main display continues to indicate the instantaneous value measured and the bargraph.

•

The secondary display ∆ indicates the absolute deviation between the instantaneous value measured and the reference recorded.

•

The secondary display ∆ % indicates the relative deviation in % between the instantaneous value measured and the reference recorded.



Range management may be "AUTOmatic" or "MANUal, depending on

the configuration when entering this mode.



The

In "AUTO" mode, they cannot fall below the reference range when the



Example: Measurement of a 1.5 VDC voltage with a reference set to 1 V:

∆∆∆∆

and

∆∆∆∆

% displays are managed in the same range.

REL mode was activated.

AUTO

1.5000

-10 10

REF

∆∆∆∆

∆∆∆∆%

REL

IIIIIII

1.0000

0.5000

050.00

V V %

Adjustment of the

reference

When the mode is active, a long press on the key opens a window for setting the REF reference.

•

The key selects the digit to be modified.

•

The keys modify the digit selected.

•

The key can be used to exit from the menu after validating the new

reference.



Example:

Reference Rel

100.000-count Graphical Multimeters 19

Functional description

Functional description (cont'd)

SURV

•

The SURV mode monitors the variations of a signal by recording the extreme values (MIN and MAX) of the main measurement and calculating the average (AVG). For each value memorized the multimeter records the corresponding date and time.



When it is started up, the MTX 3281 reinitializes the date and time (01:01:2000, 00:00:00).

Before starting work, set the correct date and time to "date-stamp" the records see §. Setting the date and time).

•

When you enter SURV mode by a short press on the key, the last MIN and MAX measurements are erased and then initialized with the current measurement.



SURV flashes when the mode is active.

•

AVG shows the average of all the measurements recorded since SURV mode

was activated.

•

The data recorded can be viewed by a long press on the key during

surveillance or after exiting from the mode.

•

In SURV mode:

- MANU or AUTO range management cannot be selected.

- the current measurement, the MIN value and the MAX value are presented in the most suitable range for each of them.



Example:

SURV

Start : 27/03/2005 10 :07 :11

Stop : 27/03/2005 10 :10 :30

Mini : -1.0000 V 27/03/2005 10 :08 :25

Max : 2.5000 V 27/03/2005 10 :09 :25

Avg : 1.3000 V

AUTO

1.5000

-10 0 10

MIN

1.0000

MAX

2.5000

AVG

1.3000

SURV

• Consultation of recorded data by a long press on the key

The data recorded is accompanied by the date, time and surveillance range.

• Exit from consultation by a short press on the .

20 100.000-count Graphical Multimeters

Functional description

0000

SMIN

SMAX

.0070

.9930

Functional description (cont'd)

SPEC

MEM

On the basis of the technical specifications, the SPEC mode directly displays the tolerance of the measurement in progress, so that there is no need to search for it and calculate it.

On the basis of the main measurement, the display:

•

indicates the specifications (x % of reading ± n digit) according to the type of

measurement, the range selected and the frequency (in AC and AC+DC)

•

calculates the interval containing the true value, if the instrument is within its tolerance: SMIN value  minimum specification SMAX value  maximum specification



Example:

•

MEM mode records the contents of the digital display(s) in the memory of the

instrument at a pre-programmed rate.

SPEC

AC+DC

0 5 10

0.3%, ± 40 digits

In AC+DC, the specifications are calculated only if the frequency can be measured (see §. secondary Functions) and is > 45 Hz.

MTX 3281

MTX 3282, MTX 3283



Example: activation

of MEM mode during

surveillance mode

•

A short press on starts a series of recordings.

•

The MEM symbol flashes throughout the recording period; it is accompanied

by the number of recordings made.

•

Memorization of the measurements can be stopped by another short press.

•

The number of values to be memorized for a measurement run is

programmable: it therefore stops recording automatically.



Another press on starts a new series of recordings.

Recording

capacity

AUTO

1.5000

-10 0 10

MIN

MAX

AVG

158 measurements per sequence 1 to 10 sequences

6500 measurements maximum

•

Furthermore, the MEM mode may be activated during the SURV mode or during display of the secondary functions. The parameters set are saved. It will then be possible to select them and display them as the main function.

1.0000

2.5000

1.3000

SURV

MEM 2

V V V

(depending on available memory)

1 to 10 sequences

100.000-count Graphical Multimeters 21



(When it is started up, the MTX 3281 reinitializes the date and time

(01:01:2000, 00:00:00). Before starting work, set the correct date and time to "date-stamp" the records. See §. Setting the date and time).

Functional description

☺

: 00

: 02

Functional description (cont'd)

Configuration of

MEM mode

The MEM mode is configured in the Func. MEM function of the Configuration Menu.

•

Opening of the Configuration menu with the key. Selection of the "Func. MEM" function using the keys.

Configuration

Measure

Measure Func.

Func. Func. MATH

Func. MATH

Func. MEM

Function MEM

Function MEM settings

settings

Validation of Func. MEM using the key.

Programming

the recording

frequency



A long press on opens the MEM Function menu.

•

Selection of the "RATE" function using the keys.

•

Validation of Rate with the key opens a menu for setting the required

recording rate in hours, minutes and seconds:

MEM Function

Consult Erase

Erase all erase

Rate

Recording rate

Rate h:mn:s

•

Selection of the variables, hour, minute, second, using the key.

•

Modification of the value using the keys.

•

Validation of the measurement recording rate and exit from the successive

menus using the key .



The minimum recording rate is 23 h, 59 min, 59 s.

Default recording rate 1s.

22 100.000-count Graphical Multimeters

Functional description

0100

Functional description (cont'd)

Programming of the

number of records

Reminder

By defining a number of records for a measurement campaign, it is possible to stop recording automatically.

•

Selection of the number of records (No. rec.) in the MEM Function menu

using the keys

•

Validation of No. rec. using the key.

•

Selection of the digit to be modified using the key.

•

Modification of the value using the keys.

•

Validation of the number of records and exit from the successive menus using

the key.

The recording capacity is limited to 6,500 measurements (158 for MTX 3281)

MEM Function

Erase Erase all erase

Rate

No. rec.

Number of recordings

Number of rec.



Number of records by default :

Reading the

recorded data

Reminder

Recordings

28/03/05 10:40:40

28/03/05 10:41:08 29/03/05 11:05:20 30/03/05 15:30:42

5 val. (2 s), V



When selected, a recording is accompanied by :

- the number of values recorded,

- the recording rate,

- the function in which they were recorded,

the secondary functions present during recording, if relevant.

The number of recording sequences is limited to 10.

1,000.

•

Select the Consult menu in the MEM Function to view the list or successive records.

Each recording is identified by its start date and time.

•

Selection of a recording using the

•

Validation the selection using the

keys.

key.

100.000-count Graphical Multimeters 23

Functional description

Cursor

Max. value of the

Min. value of the

Zoomed part of

Function of graph

displayed

Message

erased

Functional description (cont'd)

Viewing the data

in a recording

MTX 3281

MTX 3282, MTX 3283

The curve displayed is adapted to the graphical window according to its min.

and max. values and the number of recordings.

MIN -8.2194 V

Cursor value

selected function

recording

selected function

Cursor position / Total no. of records

↕ 6.5832 V

6.5832 V

9.9275 V

-8.2194 V

100/450 28 : 03 : 05 10 : 40 : 40

MIN -8.2194 V MAX 9.9275 V

MAX 9.9275 V AVG 2.3271 V

AVG 2.3271 V

Secondary functions

Display of zoomed part

Overall display of whole recording

Selection icons

Cursor date and time

•

Selection of the function (principal or secondary) to be displayed or of the

selection icon using the keys, modification using the key.

•

Selection of the function to be displayed

 Example: Main function: V secondary function: MIN, MAX, AVG for SURV mode

•

moves the cursor

moves the zoomed part (icon present, if a zoom is active) activates/deactivates a zoom (icon present, if a zoom is possible)

Exit from viewing a recording by using the key.

Complete erasure of

memory

All recordings in the memory of the device may be erased in a single operation.

•

Selection of Erase all menu in the MEM Function.

•

Validation of erasure using the

key.

Complete erasure of the memory is confirmed by the following message 

24 100.000-count Graphical Multimeters

Functional description

Function Unit

Functional description (cont’d)

Access to secondary functions

Table of secondary

functions

Refer to page 9.

MTX 3281 / 2 / 3

MTX 3283 MTX 3283

MTX 3281 / 2 / 3

MTX 3283 MTX 3281 / 2 / 3 MTX 3281 / 2 / 3

MTX 3282 / 3 MTX 3282 / 3

MTX 3282 / 3

Choice of secondary functions on the two displays 2, 3 and 4 by pressing successively on the key opposite according to main measurement.

A long pressing deletes the display of secondary measurements.



For the main authorised measurements, the last combination selected for

displays 2, 3 and 4 is memorised and will be directly reactivated.

Display 2

FREQ FREQ dBm Pk+ w

Display 3

PER

dBm

V or A

REF Pk-

REF (

(dBm)

ΩΩΩΩ

)

Ω

V or A

Ω

Func. MATH Func. MATH Func. MATH

Func. MATH

Display 4

- x

Display 1: Main measurement

VAC

AC+DC

x x x

AAC

AC+DC

PER PER

DC+

DC-

% %

Func. MATH Func. MATH

x x

PW+

CNT+

Func. MATH

PWFunc. MATH V x A

VA A

CNT-

- - - x

Func. MATH

x (∗)

Function MATH = y = Ax + B ( MTX 3282, MTX 3283)

FREQ = Frequency measurement PER = Period measurement dB = Measurement of voltage decibels in dB dBm = Measurement of power decibels in dBm with REF = dBm REF Pk+ = Measurement of positive peaks (∗∗) Pk- = Measurement of negative peaks (∗∗) CF = Measurement of peak factor w = Calculation of resistive power with REF = W REF

V x A = Calculation of power (∗) limited to 400 Hz

DC+ = Measurement of positive duty ratio DC- = Measurement of negative duty ratio PW+ = Measurement of pulse-width or of positive durations PW- = Measurement of pulse-width or of negative durations CNT+ = Counting of positive pulses (∗∗) CNT- = Counting of negative pulses (∗∗)

(∗∗) Measurement reset to zero: by pressing on key.



For optimal use, refer to §. Technical Specifications.

Ω

100.000-count Graphical Multimeters 25

Functional description

V COM A

Functional description (cont’d)

Access to secondary functions (cont’d)

MTX 3283

MTX 3282 MTX 3283

Upon activation of dB measurements, the value measured is taken as voltage reference (V ref).

The calculation is as follows: 20 log10 (V measured / V ref).



The voltage reference (V ref) cannot be modified.

The MATH function is displayed when its parameters allow it (see MATH Func.). For the dBm and resistive power measurements, see Measurement menu for

the adjustment of related reference resistances (dBm REF, W REF) and to know the calculation formulas.

The calculation of power V x A (VA) requests a 3rd connection to the A input (connected to the same circuit) in order to measure simultaneously: DC voltage (main display), DC power (display 3, measurement always in AC+DC).



order to limit the voltage drop which influences the Volt measurement.

The link on the COM input must be short and have a large diameter in

26 100.000-count Graphical Multimeters

Functional description

☺

Functional description (cont’d)

MATH function

MTX 3282 MTX 3283

Adjustment of

MATH function

The MATH function (y = Ax + B) enables measuring any physical quantity in:

- Volts (0 - 10 V process or high-voltage probe, for example)

- Amperes (current loop 4 - 20 mA or current clamp, for example)

- Frequency (output measurement, rotation speeds, for example)

- Ohms (resistive position, for example) and converting it and to assign the adequate unit, to obtain the direct reading of

the original parameter on the instrument. Depending on the parameter measured, the device calculates the related MATH function.

The programming takes place in 4 phases: Selection of parameter X measured (V, A, Ω, Hz) Definition of coefficient A of function y = Ax + B Definition of coefficient B of function y = Ax + B Definition of physical unit to be displayed



Coefficients A, B and the unit are programmable for each amount

measured (V, A,

The MATH mode is configured in the MATH function in the Configuration Menu.

•

Opening of Configuration Menu using key .

•

Selection of function MATH Func. using keys

ΩΩΩΩ

, Hz).

Configuration

General Measure

Selection of

function to be

adjusted

•

Validation of MATH Func. using key

•

Selection of Function menu using keys

Func.

Func. MATH

MATH function settings

MATH function

Function V

Coef A Coef B

Unit

Function to be set

•

Selection of measurement (V, A, Ω, Hz) using key



Default function V.

100.000-count Graphical Multimeters 27

Functional description

+2.0000 E+01

1.0000 E+00

B C D E F G

I J K L M N

PQ R S T U

WX Y Z Ω

Unit

Functional description (cont’d)

Definition of

coefficient A

Definition of

coefficient B

The MATH function applied to the physical quantity (x) measured is y = Ax + B.

•

Selection of the coefficient A menu (Coef A) in MATH function.

•

Validation of Coef A (coefficient A) using key .

•

Selection of digit to be modified or of exponent using key .

•

Modification of value using keys

•

Validation of coefficient A and menu exit using key .



Coefficient A by default is 1.

•

Selection of coefficient B menu (Coef B) in MATH function.

•

Validation of Coef B (coefficient B) using key .

•

Selection of digit to be modified using key .

Coef. A

Coef. B

•

Modification of value using keys

•

Validation of coefficient B and menu exit using key .



Coefficient B by default is 0.

Definition of unit The unit of the MATH function may be defined so as to obtain the direct

reading of the original physical quantity measured by the instrument.

•

Selection of Unit menu in MATH function.

•

Validation of Unit using key .

•

Selection of letter or character to display using key .

Abc_

28 100.000-count Graphical Multimeters

•

Validation of letter or character using keys

•

Validation of the unit (3 characters max.) and menu exit using key .

The symbol t is used to switch from uppercase letters to lowercase. The symbol w is used to erase the last character.



MATH unit by default (without).

Functional description

☺

Functional description (cont’d)

Function

Application of the

favourite function ☺

acc. to its programmed

measurements

(V, A, Ω, Hz)

☺☺☺☺

The favourite function ☺ recalls directly the specific measurement you use most frequently and that you will have carefully defined previously.

This function is of the same type as the MATH function (y = Ax + B). When you measure any physical quantity, this function enables you to convert it and to assign the appropriate unit, to obtain the direct reading of the original amount on the instrument.

Depending on the amount measured, the device calculates the related function

☺

, if the parameters of the latter correspond to the amount measured.

Programming takes place in 4 stages:

1. Selection of the amount X measured (V, A, Ω, Hz)

2. Definition of coefficient A of function y = Ax + B

3. Definition of coefficient B of function y = Ax + B

4. Definition of the physical unit to be displayed

• Access to the type of measurement using key ☺

- AC, DC or AC+DC for measurements V and A

• Access to the frequency range using key ☺

- Frequency < 900 kHz (default) or > 900 kHz for Hz measurements

• Control of operating modes using key :

- AUTO, AUTO PEAK, MANU for V and A measurements

- AUTO, MANU for Ω measurements

Adjustment of

function ☺



Pressing one of the keys will switch directly to MANUal mode, then

modify the range for measurements V, A and Ω.

Modification of the voltage range for Hz function.

• Control of display holding using key :

- HOLD, AUTO HOLD, NO HOLD for V and A measurements

- HOLD, NO HOLD for Ω, Hz measurements

• Activation, deactivation of relative mode using key

• Activation, deactivation of monitoring mode using key

• Activation, deactivation automatic recording using key

The function is configured in Func.

•

Opening of Configuration Menu using key .

•

Selection of function Func. ☺ using keys

☺

in the Configuration Menu.

Validation using key

Configuration

General

Measure

Func.

Func. MATH

Function

setting



A long pressing on opens directly the Function

100.000-count Graphical Multimeters 29

☺

menu.

Functional description

☺

Recording started

☺

Functional description (cont’d)

Selection of

adjustment

parameters

Selection of amount

measured (function)

Definition of

coefficients A, B

and unit



Example:

activation of

favourite function

and automatic

recording mode

•

Selection of adjustment parameters using keys

Function

Function V

Coef A

Coef B

•

Selection of Function menu using keys

•

Selection of amount measured (V, A, Ω, Hz) using key



Default function V.

The

☺☺☺☺

favourite function applied to the physical quantity (x) measured is the

same as the MATH function (y = Ax + B). For the definition of coefficients A, B and the unit, see the related menus of

the MATH function.



Coefficient A is by default 1, B by default 0, unit by default (without).

AUTO

1.5000

Unit

Function selection

- Symbol

1 0

- AUTO Mode active

- DC Measurement

- W Unit

- MEM Mode active

1 0

MEM 2

> 60s

☺☺☺☺

of favourite function

30 100.000-count Graphical Multimeters

Functional description

Functional description (cont’d)

SX-DMM Software kit (option)

Connection of

optical cables

RS232-DB9F

or USB

(option)

These multimeters can interface directly with a computer or a PC using the SX-DMM software kit (HX0050 option):

In the menu General settings of the multimeter:

- Select infra-red communication (IR by default) using the Comm function.

- Select Modbus communication protocol.

- Select the infra-red transmission speed using the IR baud function: 9600 / 19,200 / 38,400 Bauds/s.



The transmission speed by default is 9600 Bauds/s.

The other transmission parameters are set (8 data bits, 1 stop bit, no parity).

1. Then connect the optical cable to the optical input of the multimeter (located next to the multimeter inputs). A mechanical failsafe prevents reversing of the connection direction.

Connect cable RS232-DB9F or USB to one of the corresponding inputs of the PC.

2. Verify that the RS232 interface parameters of the PC are identical to those of the multimeter.

Connector DB9F or USB

Interface cable

Installation of

SX-DMM

software

Bluetooth (on -BT version)



For the USB optical cable (option), install, if necessary, the recognition

software on your PC (see CD-Rom manual provided).

1. Install the SX-DMM software on the PC using the CD ROM.

2. Launch the software to perform data acquisition and study the different display possibilities (curves, tables… ).



The symbol (RS232) flashes on the display during control of the instrument from the PC (REMOTE mode).

For more information, refer to software help menu.



In this mode, the multimeter keyboard is locked, except for key

which is used to exit this mode.

The -BT versions of the multimeters are fitted with a Bluetooth module. They integrate the Serial Port Profile service used to communicate with a computer fitted with any type of Bluetooth adapter.

Optical connector

If your computer does not have a Bluetooth module, the PC USB/Bluetooth adapter (P01637301) is required. To install these pilots, refer to the accompanying instructions.

Virtual RS232 serial communication between the multimeter (Server) and the PC (Customer) requires a connection on the PC side.

No configuration is required on the multimeter side, except for activation of Bluetooth (BT) communication via the Comm. function in the General Settings menu.

100.000-count Graphical Multimeters 31

Functional description

Connect

Disconnect

Functional description (cont’d)

Bluetooth (cont’d)

Creating a

Bluetooth

connection

(for first

connection only)

To activate connection with the multimeter, the Bluetooth identifying code is " 0000".

 The controls cited below are those of the PC USB/Bluetooth adapter

(P01637301). They may be designated differently on another adapter.

Steps Actions

1 2

You can verify that the connection has been created by viewing it, using the software controlling your PC USB/Bluetooth adapter.

Power up the multimeter. Configure it for Bluetooth (BT) via the configuration menu. Create a new connection using the software controlling your

Bluetooth dongle on the PC side by:

• clicking on the Bluetooth Manager icon on the menu bar at the bottom of the screen

• selecting the New connection function

• selecting Express Mode (recommended), then clicking on Next

• selecting the Bluetooth peripheral of the multimeter then by

clicking on Next

• clicking on Next after configuration of a COM port

• redefining the name of the connection and its icon (if required)

then clicking on Next

• clicking on Finish to save the connection information

 Example

Reactivation of

the connection

after shutdown

Communication

with several multimeters

For additional information, refer to the Help menu linked to the Bluetooth utility.

 With some Bluetooth adapters, rebooting of the PC is recommended to

validate the connection.

 The connection parameters are specific to each multimeter.

They must be assigned manually, but only the first time.

Communication with SX-DMM software can begin without other Bluetooth configurations. You must simply establish communication between the PC and the multimeter using the COM port configured previously.

Command SX-DMM software: Communication  Parameters

• Click on the Bluetooth Manager icon on the menu bar at the bottom of the screen

• Click on the icon related to the multimeter in the window of the Bluetooth

Parameters Software: the icon of the menu bar must be displayed in green.

The PC USB/Bluetooth adapter is used to communicate simultaneously with several multimeters in the MTX Mobile family.

For each multimeter, you must repeat the previous configuration procedure, while making sure to assign them a different COM port.

 Depending on the type of adapter, first make a COM port available.

32 100.000-count Graphical Multimeters

Technical specifications

AC voltage

MTX 3281

MTX 3282

MTX 3283

Technical specifications

Accuracy:

"n% +nD" means

"n% of reading + n

Digit"

(as per CEI 485)

Voltage measurement

VAC and VAC+DC

TRMS

((((∗)))) in VAC mode

((((∗∗)))) limitation

in high frequency

((((∗∗∗)))) typical values

((((∗∗∗∗)))) in VAC mode

Only the values assigned a tolerance or a limit constitute guaranteed values. Values without tolerance are given for information (standard NFC 42670).

The technical specifications are guaranteed only after 30 min warm-up period. Except special indication, they are valid from 5 to 100 % of the range of measurement.

On this position, you measure the true RMS value of an AC voltage with its DC component (no capacitive coupling): so-called TRMS measurement.

•



The 100 mV range is present in MANUal mode only.

•

In VAC & V

AC+DC

modes and for signals > 1 kHz, the uncertainty range is given

for information only : it is recommended to use the formulas below.

Range

100 mV (∗)

1000 mV 10.5 MΩ 10 µV 1 % ± 30D 1 % + 5 % x log(1+ 0.18 x [F(kHz) - 1]) ± 30D

10 V 10.5 MΩ 0.1 mV 0.7 % ± 30D 0.7 % + 4 % x log(1+ 0.41 x [F(kHz) - 1]) ± 30D

100 V 10 MΩ 1 mV 0.7 % ± 30D 0.7 % + 4 % x log(1+ 0.41 x [F(kHz) - 1]) ± 30D

1000 V (∗∗)

Range

100 mV (∗)

Input

impedance

1 GΩ - 10

MΩ

10 MΩ 10 mV 1 % ± 30D 1 % + 6 % x log(1+ 0.16 x [F(kHz) - 1]) ± 30D

impedance

1 GΩ - 10 MΩ 1 µV 1.5 % ± 40D

Input

Resolution

1 µV 1 % ± 50D

Resolution

45 Hz to 1 kHz

1 % + 5 % x log(1+ 0.18 x [F(kHz) - 1]) ± 50D (∗∗∗)

45 to 400 Hz 400 Hz to 4 kHz 4 to 50 kHz

Accuracy

1 to 50 kHz (log(10) = 1)

Accuracy

1.5 % + 0.417 %

x [F(kHz) - 0,4] ± 40D

3 % + 0.065 %

x [F(kHz) - 4] ± 40D

((((∗)

) in VAC mode

) )

((((∗∗)))) limitation in

high frequency

((((∗∗∗)))) typical values

((((∗)

) in VAC mode

) )

((((∗∗∗)))) typical values

from 50 kHz

((((∗∗)))) limitation

in high frequency

((((∗∗∗)))) typical values

((((∗)))) in VAC mode

((((∗∗∗)))) typical values

Range

100 mV (∗)

1000 mV 10.5 MΩ 10 µV 0.5 % ± 50D 0.5 % + 5 % x log(1 + 0.25 x [F(kHz) - 1]) ± 50D

10 V 10.5 MΩ 0.1 mV 0.3 % ± 50D 0.3 % + 6 % x log(1 + 0.16 x [F(kHz) - 1]) ± 50D 10% ± 50D

100 V 10 MΩ 1 mV 0.3 % ± 50D 0.3 % + 6 % x log(1 + 0.16 x [F(kHz) - 1]) ± 50D 10% ± 50D

1000 V (∗∗)

Input

impedance

1 GΩ - 10 MΩ 1 µV 1 % ± 50D

10 MΩ 10 mV 0.3 % ± 50D 0.3 % + 6 % x log(1 + 0.16 x [F(kHz) - 1]) ± 50D

Resolution

45 Hz to 1 kHz 1 to 75 kHz (log(10)=1) 75 to 100 kHz

1 % + 5 % x log(1 + 0.2 x [F(kHz) - 1]) ± 50D (∗∗∗) 10% ± 50D(∗∗∗)

Range Input impedance Resolution

100 mV (∗)

Range

100 mV (∗)

1000 mV 10.5 MΩ 10 µV 0.5 % ± 40D 0.5 % + 5 % x log(1+ 0,2 x [F(kHz) - 1]) ± 50D

10 V 10.5 MΩ 0.1 mV 0.3 % ± 30D 0.3 % + 8 % x log(1+ 0,06 x [F(kHz) - 1]) ± 30D 15% ± 30D

100 V 10 MΩ 1 mV 0.3 % ± 30D 0.3 % + 8 % x log(1+ 0,06 x [F(kHz) - 1]) ± 30D 15% ± 30D

1000 V (∗∗)

Range

100 mV (∗)

1 GΩ - 10 MΩ 1 µV 1.5 % ± 40D

Input impedance Resolution

1 GΩ - 10 MΩ 1 µV 1 % ± 50D

10 MΩ 10 mV 0.3 % ± 30D 0.3 % + 8 % x log(1+ 0,06 x [F(kHz) - 1]) ± 30D

Input

impedance

1 GΩ - 10 MΩ 1 µV 1.5 % ± 40D

Resolution

45 to 400 Hz 400 Hz to 4 kHz 4 to 100 kHz

45Hz to 1kHz

1 % + 8 % x log(1+ 0,06 x [F(kHz) - 1]) ± 50D (∗∗∗) 15% ± 50D(∗∗∗)

45 to 400 Hz 400 Hz to 4 kHz 4 to 50 kHz 50 to 200 kHz

1.5 % + 0.417 % x [F(kHz) - 0.4]

± 40D

Accuracy

1,5 % + 0,417 %

x [F(kHz) - 0,4] ± 40D

Accuracy

1 to 100 kHz (log(10) = 1) 100 to 200 kHz

Accuracy

3 % + 0.0217 %

x [F(kHz) - 4]

± 40D

3 % + 0.065 %

x [F(kHz) - 4] ± 40D (∗∗∗)

10% ± 50D(∗∗∗)

10% ± 50D

15% ± 50D(∗∗∗)

15% ± 30D

5 % + 0.067 %

x [F(kHz) - 50]

± 40D (∗∗∗)

100,000-count graphical multimeters 33

Technical specifications

AC voltage

DC voltage

MTX 3281

MTX 3282

MTX 3283

Technical specifications (cont’d)

(∗∗) BP : Freq [kHz] limited to : 15,000 / U applied [V]

VAC and V

AC+DC

(cont’d)

U applied [V] limited to : 15,000 / Freq [kHz]



RMS

Example : U applied = 1000 VAC  max. frequency : 15,000 / 1000 = 15 kHz

In the presence of a continuous component : Additional error : (UDC / U measured) x (0,7% + 70D)



Example : UDC = 2 V, U measured = 5 Vrms  additional error : 0.28% + 28D

Rejection: common mode > 80 dB at 50 Hz or 60 Hz depending on selection Automatic or manual selection of ranges. Protection by varistors. Maximum permanent acceptable voltage: 1000 V

ACrms.

Specifications valid from:

20 to 100% of range in the 20 kHz to 200 kHz MTX 3283 band, 20 kHz to 100 kHz MTX 3282 20 kHz to 50 kHz MTX 3281.



As soon as the PEAK symbol is displayed, connect to AUTO PEAK :

MTX 3282 MTX 3283

Influence of peak factor on accuracy in VAC, V

•

1% for a peak factor between 4,5 and 6

•

5% for a peak factor between 6 and 9

AC+DC

at 50% of the range:

In "DC" mode, you measure the value of a DC voltage or the DC component of

an AC voltage, once the filter is activated, see p. 15.



The 100 mV range is present in MANUal mode only.

Range

100 mV (∗) 10 MΩ / 1 GΩ

1000 mV

10 V

100 V

1000 V

Input impedance

20 MΩ / 1 GΩ

10.5 MΩ 10 MΩ 10 MΩ

Resolution

1 µV 0.1% + 30D

10 µV

0.1 mV

1.0 mV 10 mV

Protection

1450 Vpk

Accuracy

0.1% + 8D

0.2% + 8D

Range

100 mV (∗) 10 MΩ / 1 GΩ

1000 mV

10 V

100 V

1000 V

Range

100 mV (∗) 10 MΩ / 1 GΩ

1000 mV

10 V

(∗) - Recovery after triggering of protection (> 10 V) app. 10 s.

100 V

- Protection 1 minute max.

1000 V

Input impedance

20 MΩ / 1 GΩ

10.5 MΩ 10 MΩ 10 MΩ

Input impedance

20 MΩ / 1 GΩ

10.5 MΩ 10 MΩ 10 MΩ

Resolution

1 µV

10 µV

0.1 mV

1.0 mV 10 mV

Resolution

1 µV

10 µV

0.1 mV

1.0 mV

10 mV

Protection

1450 Vpk

Protection

1450 Vpk

Accuracy

0.1% + 30D

0.05% + 8D

0.03% + 8D

0.035% + 8D

Accuracy

0.1% + 30D

0.05% + 8D

0.02% + 8D

0.03% + 8D

(∗) - Accuracy with filter (p. 15) and REL mode activated (∆ measurement).

- Recovery after release of the protection (> 10 V) approx. 10 s.

- Protection 1 min. max. Specifications valid from 0 % to 100 % of the range Rejection: common mode: > 120 dB with 50 Hz and 60 Hz acc. to selection

serial mode: > 60 dB with 50 Hz and 60 Hz acc. to selection Automatic or manual selection of the ranges. Protection by varistors.

34 100,000-count graphical multimeters

Technical specifications

Technical specifications (cont’d)

Current measurement

DC current

MTX 3281 MTX 3282 MTX 3283

AC current

AC+DC TRMS

MTX 3281

MTX 3282

MTX 3283

In "ADC" mode, you measure the value of a DC current or the DC component of an AC current.

Range

1000 µA

10 mA

100 mA

1000 mA

10 A 100 µA

100 A

(∗∗)

put impedance

≈ 170 Ω

≈ 17 Ω ≈ 1.7 Ω

≈ 0.17 Ω

≈ 0.03 Ω (∗)

(∗) with the fuse delivered with the instrument (∗∗) 100 A range limited to 20 A Specifications valid from 0 % to 100 % of range

In "AAC" and "AAC+DC" modes, you measure the true RMS value of an AC current with/without its DC component (no capacitive coupling in "AC+DC" mode).

Range

1000 µA

10 mA

100 mA

1000 mA

10 A 100 µA 1 % ± 300D 1 % + 0.15 % x [F(kHz) - 1] ± 300D

100 A (**)

put impedance Resolution Protection

≈ 170 Ω

≈ 17 Ω ≈ 1.7 Ω ≈ 0.17 Ω

≈ 0.03 Ω (*)

10 nA 1 % ± 40D 1 % + 0.25 % x [F(kHz) - 1] ± 30D (***)

0.1 µA 1 % ± 30D 1 % + 0.1 % x [F(kHz) - 1] ± 30D 1 µA 1 % ± 30D 1 % + 0.1 % x [F(kHz) - 1] ± 30D

10 µA 1 % ± 30D 1 % + 0.1 % x [F(kHz) - 1] ± 30D

1000 µA

Range

1000 µA

10 mA

100 mA

1000 mA

10 A 100 µA 0.4 % ± 400D 0.4 % + 0.15 % x [F(kHz) - 1] ± 400D -

100 A (**)

Range

1000 µA 10 mA

100 mA

1000 mA

(*) with the fuse delivered with the instrument (**) 100 A range limited to 20 A

10 A 100 µA 0.4 % ± 400D 0.4 % + 0.15 % x [F(kHz) - 1] ± 400D -

In presence of a continuous component :

100 A (**)

additional error : (I DC / I measured) x (0,7% + 70 D)

impedance

≈ 170 Ω

≈ 1.7 Ω

≈ 0.17 Ω

≈ 0.03 Ω (*)

impedance

≈ 170 Ω

≈ 1.7 Ω

≈ 0.17 Ω ≈ 0.03 Ω

Input

≈ 17 Ω

Input

≈ 17 Ω

(*)

Resolution Protection

10 nA 0.5 % ± 40D

0.1 µA 0.3 % ± 30D 0.3 % + 0.1% x [F(kHz) - 1] ± 30D 1 µA 0.3 % ± 30D 0.3 % + 0.1% x [F(kHz) - 1] ± 30D

10 µA 0.3 % ± 30D 0.3 % + 0.1 % x [F(kHz) - 1] ± 30D -

1000 µA

Resolution Protection

10 nA 0.5 % ± 40D

0.1 µA 0.3 % ± 30D 0.3 % + 0.1 % x [F(kHz) - 1] ± 30D 1 µA 0.3 % ± 30D 0.3 %+ 0.1 % x [F(kHz) - 1] ± 30D

10 µA 0.3 % ± 30D 0.3 % + 0.1 % x [F(kHz) - 1] ± 30D -

1000 µA

20 A < 30 s

11 A

20 A < 30 s

11 A

20 A < 30 s

Resolution Protection Accuracy

10 nA 0.1 % + 15D

0.1 µA 1 µA

10 µA 0.15 % + 8D

1000 µA

45 Hz to 1 kHz

11 A

2.5 % ± 30D 2.5 % + 0.15 % x [F(kHz) - 1] ± 30D

45 Hz to 1 kHz

0.5 % + 0.25 % x [F(kHz) - 1] ± 30D

2.5 % ± 40D 2.5 % + 0.15 % x [F(kHz) - 1] ± 40D

45 Hz to 1 kHz

0.5 % + 0.25 % x [F(kHz) - 1] ± 30D

2.5 % ± 40D 2.5 % + 0.15 % x [F(kHz) - 1] ± 40D -

11 A

20 A < 30 s

1 to 20 kHz 20 to 50 kHz

Accuracy

(***)

Accuracy

1 to 20 kHz 20 to 50 kHz

(***)

0.08 % + 8D

0.5 % + 15D

1 to 20 kHz

A max. overload of 20 A is acceptable for 30 s max. with a pause of 5 min at least between each measurement.

From 7 A, the measurement is limited to an ambient temperature of 40° C and a period of 1h30 with a pause of 15 min at least between each measurement.

Specifications valid from 10 % to 100 % of range for sinusoidal current. Protection 1000 Vrms by ceramic HRC type fuse

Fuse 1000 V, 11 A > 20 kA Cos ϕ > 0.9 (10 x 38 mm)

MTX 3282 MTX 3283



As soon as the PEAK symbol appears, switch to AUTO PEAK mode :

mA and µA range: Additional error of 2% for a peak factor between 4.5 and 6 Additional error of 15% for a peak factor between 6 and 9 10 A range: Zero up to peak factor of 6.

Voltage drop

: 10 A < 400 mV 1 mA ≈ 160 mV 10 mA ≈ 180 mV 100 mA ≈ 180 mV 1000 mA ≈ 300 mV

100,000-count graphical multimeters 35

Technical specifications

Technical specifications (cont’d)

Frequency measurement

Main frequency (Hz)

MTX 3281 MTX 3282 MTX 3283

In this position, you measure the frequency of a voltage.

AC Signals

Range Resolution Protection Accuracy

0.8 to 10 Hz 0.0001 Hz

10 to 100 Hz 0.001 Hz

100 to 1000 Hz 0.01 Hz

1000 Hz to 10 kHz 0.1 Hz

10 to 100 kHz 1 Hz

100 to 1000 kHz 10 Hz

1 MHz to 2 MHz 100 Hz

1450 Vpk 0.02 % ± 8D

Range

0.8 Hz to 10 Hz 15 % of range 25 % of range 15 % of range 15 % of range 15 % of range

10 Hz to 100 kHz 10 % of range 20 % of range 10 % of range 10 % of range

100 to 500 kHz 500 to 1000 kHz typ. 30 % of range 1 MHz to 2 MHz

100 mV 1 V 10 V 100 V 1000 V

(∗∗)

Sensitivity (applicable on rectangular signals only)

20 % of range typ. 20 % of range

typ. 50 % of range

20 % of range (∗) 20 % of range (∗)

10 % of range (∗)

- -

(∗) Freq [kHz] limited to: 15,000 / U applied [V] U applied [V] limited to: 15,000 / Freq [kHz] (∗∗) limited to 200 kHz The measurement is performed by capacitive coupling.

Selection of the manual frequency range < 900 kHz (default) or > 900 kHz, via a short pressing of the key opposite. Selection of voltage range in manual mode possible, via a long pressing of the

key opposite. Input resistance: ≈ 10 MΩ (Freq < 100 Hz)

Maximum permanent acceptable voltage: 1000 Vrms. See (∗). Protection by varistors at the voltage input

Parallel

voltage or current

or frequency

(secondary

function)

MTX 3281 MTX 3282 MTX 3283

You measure the frequency and value of a voltage or a current.

Range Accuracy Resolution Admissible overload

0.8 to 10 Hz 0.0001 Hz

10 to 100 Hz 0.001 Hz 100 to 1000 Hz 0.01 Hz 1000 to 10 kHz 0.1 Hz

10 to 100 kHz 1 Hz

100 to 200 kHz

Range

0.8 Hz to 5 kHz 15 % of range 20 % of range 15 % of range 20 % of range

5 kHz to 50 kHz 10 % of range 20 % of range 10 % of range 20 % of range

50 kHz to 100 kHz 15 % of range 25 % of range 15 % of range

100 kHz to 200 kHz - 30 % of range 30 % of range

0.02 % + 8D

10 Hz

Sensitivity (applicable on rectangular signals only) Vrms

100 mV 1 V

10 V to 1000 V (∗) 1000 µA to 20 A (∗∗)

1450 Vdc

(1 min max.)

on 500 mV range

(∗) Freq limited to [kHz]: 15,000 / U applied [V] U applied [V] limited to [V]: 15,000 [V ∗ kHz] / Freq [kHz] (∗∗) limited to 20 kHz MTX 3281 ; at 50 kHz MTX 3282, MTX 3283 for the "Ampere" range

Measurement is performed by capacitive coupling Input resistance: ≈ 10 MΩ (Freq < 100 Hz) Protection by varistors at voltage input

36 100,000-count graphical multimeters

Technical specifications

Technical specifications (cont’d)

Resistance measurement (ΩΩΩΩ)

MTX 3281

MTX 3282 MTX 3283

In this position, you measure the value of a resistance.

Automatic/manual range selection

Range

1000 Ω 10 mΩ

10 kΩ 100 mΩ 100 kΩ 1 Ω 1000 kΩ

10 MΩ

50 MΩ

Range

1 000 Ω

10 kΩ 100 mΩ 100 kΩ 1 Ω 1000 kΩ

10 MΩ

50 MΩ

Accuracy

0.1 % + 8D

0.5 % + 8D 2 % + 8D

Accuracy

0.1 % + 8D

0.07 % + 8D

0.5 % + 8D 2 % + 8D

Resolution

10 Ω

100 Ω

1 kΩ

Resolution

10 mΩ

10 Ω

100 Ω

1 kΩ

"Active" protection via CTP thermistor Measurement voltage: ca. 1.2 V

Maximum voltage developed on open circuit: 4 V typ

Protection

1000 Vrms

Protection

1000 Vrms

Continuity Mode ( )

MTX 3281 MTX 3282 MTX 3283

Diode Test (

)

MTX 3281 MTX 3282 MTX 3283



In range 50 MΩ, in order to avoid the influence of the network and to guarantee the given specifications, it is advised to disconnect the multimeter from Wall Plug.



For measurements higher than 10 MΩ, a shielded cable is recommended. For a 2 wire-link, use very short wires (< 25 cm) and twist them.

On this position, you can measure the value of a resistance up to 1000 Ω, with steady audio indication at 2 kHz.

Range

Beeper 0.1% + 8D approx. 0.4 mA

Accuracy

Measuring current

Resolution

100 mΩ

Protection

1000 Vrms

Detection threshold in continuity mode ≈ 120 Ω (response time ≈ 5 ms). "Active" protection via CTP thermistor. Maximum voltage on open circuit: 4 V max, 2 V typ.

Indication of junction voltage in the direction from 0 to 2.6 V in a single range

(10 V range)

Accuracy 2 % ± 30 D

Resolution 0.1 mV

Measuring current < 1 mA Maximum voltage developed on open circuit 4 V max. "Exceeded" indication in reverse direction "Active" protection by CTP thermistor 1000 Vrms

100,000-count graphical multimeters 37

Technical specifications

Technical specifications (cont’d)

Capacitance measurement ( )

MTX 3281 MTX 3282 MTX 3283

Temperature measurement with Pt 100 or Pt 1000

MTX 3282 MTX 3283

In this position, you can measure the value of a capacitor.

Range Accuracy Resolution Measurement time Protection

10 nF (∗)

100 nF 100 pF

1000 nF 1 nF

10 µF 10 nF

100 µF

1000 µF 1 % + 15D 1 µF

10 mF 1.5 % + 15D 10 µF

1 % + 10D

1 % + 5D

10 pF

100 nF

< 0,2 s < 0,5 s

< 2 s

≈ 5 s/mF

(∗) Use the REL function for values < 10 % of range to reset to residual zero (compensation of the test lead capacity)

Resolution of 1000 points.

Automatic/manual range selection

. "Active" protection by CTP thermistor. Maximum voltage delivered on open circuit: 1 V typ. / 4 V max.

For measurements lower than 10 nF, a shielded cable is recommended.



For a 2 wire-link, use very short wires (< 25 cm) and twist them

In this position, you measure a temperature via a Pt 100 or Pt 1000 sensor.

Range

- 125°C to + 75°C

- 200°C to + 800°C

Measuring current

< 0.8 mA (Pt 100)

< 0.5 mA (Pt 1000)

< 0.8 mA (Pt 100)

< 0.5 mA (Pt 1000)

Resolution

0.1°C ≡ 2µV

Accuracy ± 0.5°C

0,1 % ± 1°C

0,07 % ± 1°C

"Active" protection by CTP thermistor Display in ° C (Celsius) / K (Kelvin) / ° F (Fahren heit) possible

1000 Veff.

Protection

1000 Vrms

Temperature measurement with thermocouple J or K

MTX 3281 MTX 3282 MTX 3283

dBm measurement (power decibels)

MTX 3283

dB measurement (voltage decibels)

MTX 3283

In Temperature measurement, it is possible to modify the scale of the graphic window



with the keys .

The selected scale is recalled in the help line

In this position, you measure the temperature via a thermocouple: Thermocouple K from -40° C to +1200° C

Thermocouple J from -40° C to +750° C Internal measurement accuracy ± 3° C ± 0.1% range (-10° C to 55° C)

Reference temp. accuracy ± 3° C / typical value Type of thermocouple J and K

The multimeter needs 60’ to adapt to the ambient temperature.

Display of measurement in dBm in relation to a resistance reference (dBm REF) adjustable from 1 Ω to 10,000 Ω, factory set at 600 Ω. Resolution 0.01 dB Absolute error in dB 0.09 x VAC relative error expressed in % Additional calculation error 0.01 dB Measuring range 10 mV to 1000 V Protection 1000 Vrms

Display of measurement in dB with the value measured (V ref) at activation of the mode as voltage reference. Resolution 0.01 dB

Absolute error in dB 0.09 x V

relative error expressed in % Additional calculation error 0.01 dB Measuring range 10 mV to 1000 V Protection 1000 Vrms

38 100,000-count graphical multimeters

Technical specifications

Accuracy (typical) : V measurement accuracy + Peak A measurement accuracy

The connection on the COM input must be short and of large diameter, in order to

Technical specifications (cont’d)

Peak measurement Pk+ Pk-

MTX 3281 MTX 3282 MTX 3283

SURV Function

(MIN, MAX, AVG)

Resistive power W

Power calculation V x A

MTX 3282 MTX 3283

Secondary values

Peak V t > 250 µs 100 mV to 1000 V 3% ± 50D

Peak A t > 250 µs 1000 µA to 20 A 4% ± 50D

Specifications valid from 20 % of the range in A, 10 % of the range in V The value of the peak factor results from calculation: (Pk+ - Pk-) / 2 x Vrms Additional error for 250 µs < t < 500 µs : 3 %

Measurement zero reset : by pressing the key .

Accuracy and rate: id. specifications Volt and Ampere measurements

MTX 3281, MTX 3282, MTX 3283

Display of measurement in relative power in relation to a resistance reference (W REF) adjustable from 1 to 10,000 Ω, factory-adjusted to 50 Ω. The function performed is: (measured voltage)2 / W REF (unit W) (measured current)2 ∗ W REF(unit W) Ranges DC and AC Resolution 100 µW Accuracy 2 x accuracy in VDC or VAC (in %) Protection 1000 Vrms

Peak ranges

Additional error

Protection

1000 Vrms

or 10 Arms

In AC and AC+DC voltage measurement : this calculation is limited to 400 Hz

The current measurement is always performed in AC+DC.



limit the voltage drop which influences Volt measurement.

Duty ratio DC+ DC-

MTX 3281 MTX 3282 MTX 3283

Pulse counting CNT+ CNT-

MTX 3282 MTX 3283

Display of the measurement in % of a logic signal (TTL, CMOS…) DC+ Duty ratio = θ

DC- Duty ratio = T - θ Resolution 0.01% Minimum duration for θ 10 µs Maximum duration for T 0.8 s Minimum duration for T 200 µs Nominal range 5 to 90% typical Sensitivity (10 V range) > 30% of the Freq range < 1 kHz > 50% of the Freq range > 1 kHz Absolute error on the duty ratio, expressed in absolute % 0.05% + 0.0001 / T [t in s] Freq < 1 kHz

0.1% + 0.0005 / T [t in s] Freq > 1 kHz Additional absolute error 0.1 x C/P (slope at switching to zero) C = range in V or in A (for range 1000 V, C = 5000) P = slope in V/s, A/s Protection 1000 Vrms

Depending on triggering conditions of frequency meter. Minimum pulse duration 5 µs Counting up to 99999 Triggering threshold 10 % of range except range 1000 VAC

This threshold is: positive in Counter reset to zero by pressing the key .

, negative in



For negative events, reverse the cables.

100,000-count graphical multimeters 39

Technical specifications

Model No. :

3283

CALIBRATION

Technical specifications (cont’d)

Pulse width PW+ PW-

MTX 3282 MTX 3283

Clock

Influences

Depending on triggering conditions of frequency meter. Resolution 10 µs

Minimum pulse width 100 µs Accuracy 0.05% ± 10 µs Maximum period duration 12.5 s Triggering threshold 20 % of range except range 1000 VAC

This threshold is positive in , negative in . Additional error on measurement caused by slope when crossing zero: see §. Measurement of duty ratio.



For negative events, cross the cables.

MTX 3281 Relative time with reset to zero at each

powering up

MTX 3282, MTX 3283 Real-time clock

Accuracy ≈ 30 s / month: real-time clock deviation Display date - month - year / hour - minute - second

•

Specifications of the accuracy in the field of utilization:

Typical specifications = SPEC (1 + 0,05 ∆ t ° C)

Multimeter

Traceability

Specification of the considered measurement. Values given p. 33 to 38. ∆ T: difference between ambient temperature and input terminal nearest to the field of reference.



Example : temperature : 38° C DC measurement : 0,02 % + 8 D ∆ t ° C = 38 - 28 = 10° C SPEC (38° C) = (0,02 % + 8 D) (1 + 0,05 ∗ 10)

= 0,03 % + 12 D

•

Electric field under 3 V/m : 1 per thousand at full scale. This influence does not depend on the temperature.

In the « General settings », the

TRACEABILITY

Serial No. : 10010110 Firmware Vers. : 1.00 Hardware Vers. : C

Last Cal. : 27/11/2005 10:08:25

Next Cal. : 27/11/2006 10:08:25

menu Traceability opens a file with multimeter up-datings :

• Model

• Serial No

• Firmware Version

• Hardware Version

40 100,000-count graphical multimeters

Calibration

A periodic calibration (once a year) of the multimeter is necessary to guarantee the given specification (refer to §. Maintenance, Metrological verification)

General characteristics

Environmental Conditions

Power supply

MTX 3281

MTX 3282 MTX 3283

Altitude < 2000 m Reference temperature 23° C ± 5° C Utilization temperature 0° C to 55° C Influence of temperature see §. Influence

Relative humidity 80 % max. for temperatures up to 31° C decreasing linearly to 50 % at 40° C limited to 70 % for 50 MΏ range

Sealing IP 51 Operating range - 10° C to 55° C Storage range - 40° C to 70° C Battery charge range 0 to 40° C

2 possibilities:



Batteries 3 x 1.5 V alkaline LR6-AM3 AA



Accumulators 3 x 1.2 V (*) Ni-MH 2600 mAh AA

3 possibilities:



Batteries 3 x 1.5 V alkaline LR6-AM3 AA



Accumulators 3 x 1.2 V (*) Ni-MH 2600 mAh AA



Wall Plug power unit:

Mains voltage 100 V ± 10% or 240 V ± 10% Frequency 0.3A 50-60 Hz ± 3%

(*) Other capacities are possible. Via the wall plug, the accumulators can be recharged without removing them from the multimeter.

Average charging period: 7h30 (with 2600 mAh accumulators)

Display

Endurance





with

batteries 80 h (V



with

2200 mAh accumulators approximately 65 h (V

mode)

In case of intermittent use of the multimeter, powering by Ni-MH cells is not recommended: this type of cell has an self-discharge rate of 100 % after 3 months of non-use.

Endurances are reduced if the LCD backlight and/or the Bluetooth

communications interface is used."

Graphic LCD useful part 58 x 58 mm orientable, LED backlit, transflective improvement of contrast in full light

Main display 100,000 points + sign + curve adaptive units + bargraph (40 segments) indicators of modes engaged battery level indicator, dangerous voltage indicator…

Secondary display secondary functions with adapted units

100,000-count graphical multimeters 41

General chracteristics

General characteristics (cont’d)

Safety

EMC

US version

RS232-DB9F or USB optical cables (options)

As per EN 61010-1 :

•

Insulation class 2

•

Degree of pollution 2

•

Utilisation interior

•

Altitude < 2000 m

•

Measurement category

of "measurement" inputs CAT III, 1000 V in relation to earth

•

Measurement category

of "measurement" inputs" CAT IV, 600 V in relation to earth

This device was designed in accordance with EMC standards in force and its compatibility was tested in accordance with the following standards:

•

Emission (cl. A) and Immunity EN 61326-1

•

Max. influence in presence

of radiated fields See §. Influences

•

Acc. to UL 61010-1, CSA C22.2 nr. 61010-1

Homologation UL E 309119

The optical interface ensures insulation in relation to the connected peripheral (PC) for the transfer of data or for remote control of the multimeter.

RS232 communication interface parameters: Transmission speed: 9600 / 19,200 / 38,400 Bauds/s



The other transmission parameters are set (8 data bits, 1 stop bit,

Bluetooth (-BT version only)

no parity).

USB communication interface: delivered with installation software.

Transmission speed 38.4 kbit/s Sensitivity -90 dBm Max. power 20 dBm (100 mW) Max. distance ca. 100 m Battery life ca. 40 h (VDC mode) with alkaline batteries

Mechanical characteristics

•

Casing

Dimensions 87.8 x 265.5 x 107.5 in mm (open position)

87.8 x 187 x 48.6 in mm (casing closed)

•

Weight 0.450 kg approximately

•

Materials ABS VO (auto-extinguishing) and PC VO

external protective moulding in thermoplastic

rubber : SEBS

•

Sealing IP 51

•

Packaging

42 100,000-count graphical multimeters

Dimensions

MTX 3281 MTX 3282, MTX 3283

240 (L) x 158 (W) x 65 (H) in mm

297 (L) x 158 (W) x 60 (H) in mm

Supply

Delivered with the instrument

MTX 3281

MTX 3282

MTX 3283

Supplement delivered with versions

MTX 328I-COM MTX 3282-COM MTX 3283-COM

•

Quick Check Guide (bilingual Fr - En)

•

Set of 3 batteries 1.5 V alkaline LR6-AM3

•

Set of PVC test leads - 4 mm safety touch prods

•

Quick Check Guide (bilingual Fr - En)

•

Set of 3 accumulators 1.2 V Ni-MH 2600 mAh

•

Wall Plug power/charger unit

•

Set of silicon test leads - 4 mm safety touch prods

•

Quick Check Guide (bilingual Fr - En)

•

Set of 3 accumulators 1.2 V Ni-MH 2600 mAh

•

Wall Plug power/charger unit

•

Set of silicon test leads - 4 mm safety touch prods

• Acquisition software kit:

- "Data Viewer" Acquisition software for PC

- RS232-DB9F Optical cable

Optional Accessories

• Calibration software of the MTX 328x range HX0059

• Acquisition software kit: HX0050

- "Data Viewer" Acquisition software

- RS232-DB9F Optical cable

• External charger for NiMH cells HX0053

• USB Optical cable + installation software HX0056-Z

•

Adapter + K thermocouple P06239306

•

Ammeter clamps:

MN 08 or 09 C100 or 103 Ampflex MN 73 K2 E6N

PAC21

0.5 to 240 AAC ratio 1000 /1 40 Hz to 10 kHz

0.1 to 1200 AAC ratio 1000 /1 30 Hz to 10 kHz

0.5 to 2000 AAC 1 mV/A 10 Hz to 20 kHz

0.01 to 240 AAC 1mA/mV or 1A/10mV 40 Hz to 10 kHz

0.1 to 450 mADC 1 mA/10 mV DC - 1.5 kHz

0.005 to 80 A

AC/DC

0.2 to 1400 A

1 A/1 V or 1 A/10 mV DC - 8 kHz

AC/DC

1 A/10 mV or 1 A/1 mV DC - 10 kHz

P01120401 or 02 P01120301 or 03 P01120504 P01120421 P01120074 P01120040A

P01120069

• "2 hands free" Transport Kit HX0052

• Set of 3 1.2 V Ni-MH cells HX0051

• PC Adapter USB/RS232 HX0055

• PC Adapter USB/BLUETOOTH P01637301

• USB optical cable HX0056

•

Temperature sensor Pt 1000 HA1263

Spare parts

• Fuse 1000 V, 11 A, 10 x 38 mm, 20 kA 541171

• Wall Plug power unit EU/US X03205

• Set of test leads - safety touch prods AG1064

•

Optical cable RS232-DB9F X02736

100,000-count graphical multimeters 43

Index

888888 (function) 9

absolute deviation AC voltage AC, AC+DC 7 Accessories accumulators activation (powered) alert amount measured Ampere (function) audio warning auto (mode) auto hold (mode) auto peak (mode) automatic detection automatic recording automatic stop AVG

back-lighting bargraph basic (mode) batteries Bluetooth buzzer

cable connection capacitance measurements 5, 7, 9, 17, 38 capacitive coupling casing charge (recharge) CNT coef. A, coef. B COM comm. communications configuration configuration (menu) continuity measurement continuity mode current measurement

date dB measurement db9f dBm REF dBm DC voltage DC diode measurement

19 33

3, 43 10-13, 43 6, 10 5, 9 29, 30 5, 13 5, 14, 18 18 8, 18 8, 18 4 8, 29 14 20

8, 9, 15 9 15 10 5, 31, 32, 42 4, 5, 10, 14

33, 35, 36 42 10-13 25, 39 27, 28, 29 5, 17, 18 31 5 7, 8, 15-18 15-18 17 37 7, 16, 34

14, 20 38 31, 42, 43 15 38 33, 34 25, 34, 39 17, 37

display duty ratio

EMC endurance energy English (Choice of language) 14 environment erase

favourite function filter French (Choice of language) 14 FREQ frequency measurement main functions secondary functions 9, 25 fuse

General (function) General (menu) general settings Graphical display guarantee

9, 42 39

42 41 11, 12

3, 41 24

29, 30 15

22, 25 36 7, 17

4, 5, 13 ,43

11 12, 14 11, 31, 40 9 4

help (i) HOLD (mode) humidity

I - J - K

impedance initial settings inputs IR baud J (thermocouple) jack connector K (thermocouple) keyboards keys

LCD contrast

main display main functions main measurement maintenance MANU (key) MATH (function)

7, 9, 31, 32 8, 18 3, 41

8, 15 14 9 31 7 6, 12 7 6 7, 8

8, 9, 14, 41

19, 41 7, 16, 17, 24 18-21 4 8, 18, 29 25-30

44 100,000-count graphical multimeters

Index

MAX measurement category MEM (function) MEM (key) MEM (mode) memory MIN monitoring

N - O

NO HOLD (mode) optical cable optical link

parameters peak factor peak measurement PER (period) Pk (peak) power supply power unit (Wall plug) protection Pt100 (sensor) Pt1000 (sensor) pulse counting pulse width

range recharge (charge) recorded data recording REL resistance measurement resistive power RS 232

safety secondary displays secondary functions sensor software kit SPEC (function) standby supply SURV SX-DMM 31, 32

TC J (thermocouple) TC K (thermocouple) temperature

20, 21, 24 3 9, 23, 24 8 5, 8, 14, 21, 22 24 20, 21, 24 29

8, 18, 29 31, 42, 43 5

30 18, 25 39 25 25 12, 14, 41 10, 37, 41, 43 3, 5, 13 7 7 39 40

18 10-13 20, 23 20-24, 29, 30 8, 9, 17, 18 7, 17, 37 16, 25, 26, 39 5, 9, 31, 42, 43

3, 4, 10, 42 8, 9 9, 23, 25, 36 17, 38, 43 31 21 14 43 5, 8, 9, 14, 20

7, 17 7, 17 3, 11, 33, 35, 40

temperature measurement terminal board thermocouple time traceability 40 transient overvoltages type of energy

U - V - W

unit Wall plug 12, 13

7, 8, 17, 18, 38 6 7, 17 13, 14, 20

5 11

26, 27, 28

100,000-count graphical multimeters 45

Metrix MTX 3281, MTX 3282, MTX 3283 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

General instructions

Introduction

Symbols used on the instrument

Precautions and safety measures

Safety features

Maintenance and metrological verification

Warranty

Cleaning

Measurement input protection systems

Special functions

Description of the instrument

Front (description)

Inputs

Display

Functional description

Preparation for use

Initial settings

Specific configurations of the instrument

Initialization of the values

Access to main functions

Access to secondary functions

MATH function

SX-DMM Software kit (option)

Bluetooth (on -BT version)

Technical specifications

Voltage measurement

Current measurement

Frequency measurement

Temperature measurement with Pt 100 or Pt 1000

Temperature measurement with thermocouple J or K

dBm measurement (power decibels)

dB measurement (voltage decibels)

Power calculation V x A

Clock

Influences

Multimeter

General characteristics

Environmental Conditions

Power supply

Display

Safety

RS232-DB9F or USB optical cables (options)

Bluetooth (-BT version only)

Mechanical characteristics

Casing

Packaging

Supply

Delivered with the instrument

Supplement delivered with versions

Optional Accessories

Index