MD 9050 - Multimeter Metrel - Free user manual and instructions

Product Type	Digital Multimeter
Brand	Metrel
Model	MD 9050
Measurement Category	CAT IV 1000V AC/DC
Display	LCD 9999 counts (ACV, DCV, Hz, nS) / 6000 counts (mV, µA, mA, A, Ω, capacitance)
True RMS	Yes, True RMS AC+DC
AutoCheck™	Automatic selection DCV, ACV, resistance with low impedance
Main Measurements	AC/DC voltage (up to 1000V), AC/DC current (up to 10A, 20A for 30s), resistance (60MΩ), capacitance (25mF), frequency (1MHz), temperature (type K, -50°C to 1000°C), diode test, continuity, conductance, dBm, logic level, duty cycle
Special Functions	1ms peak mode, MAX/MIN/AVG recording, electric field detection (EF), backlight, HOLD, relative mode, auto power off (APO)
PC Interface	Optical port (AMD9050 kit optional)
Power Supply	9V battery (NEDA1604G, JIS006P, IEC6F22 or equivalent)
Battery Life	Approximately 30 minutes before auto power off; consumption 5 mA, 50 µA standby
Dimensions	L208 x W103 x H64.5 mm (with case)
Weight	635 g (with case)
Operating Temperature	0°C to 45°C, max relative humidity 80% (linearly decreasing to 50% at 45°C)
Maximum Altitude	2000 m
Protections	Double insulation, fuses 0.44A/1000V (mA) and 11A/1000V (A), overvoltage protection 1050Vrms
Maintenance	Clean with damp cloth and mild detergent; remove battery for storage >60 days
Spare Parts	9V battery, fuses (FS1: 0.44A/1000V 10x38mm, FS2: 11A/1000V 10x38mm), test leads, type K temperature probe (AMD9023), PC interface kit (AMD9050)
Repairability	User replaceable battery and fuses; internal fuse resistors requiring a qualified technician
Standards	CE, CENELEC, IEC/EN 61010-1, 61010-2-030, 61010-2-033, 61010-031

Frequently Asked Questions - MD 9050 Metrel

How to use the AutoCheck™ function of the MD 9050?

Set the rotary switch to the AutoCheck position (usually marked with a symbol). Connect the test leads. The instrument automatically selects DC voltage, AC voltage, or resistance measurement based on the signal present. If a resistance below 60 MΩ is detected, it displays the value and beeps if the audible threshold is reached. For voltages, it switches between DC and AC automatically. Use the SELECT button to lock a specific function.

What is the difference between True RMS and average detection?

A True RMS multimeter (true effective value) correctly measures all waveform types (sine, square, triangle, etc.) by calculating the square root of the mean of squares. The average detection calibrated method assumes a pure sine wave and can give significant errors on non-sinusoidal signals. The MD 9050 uses True RMS technology for accurate measurements on any waveform.

How to measure temperature with the MD 9050?

Set the rotary switch to the Temp position (thermometer symbol). Insert the type K temperature probe (AMD9023 supplied) into the COM and V/Ω terminals, observing polarity. Press SELECT to toggle between °C and °F. For dual channel measurements (T1/T2), use the RANGE button (T1-T2) to select T1, T2, T1+T2 or T1-T2.

How to replace the battery of the Metrel MD 9050?

Disconnect the test leads and turn off the instrument. Loosen the 2 screws of the battery compartment on the back. Remove the cover and the old battery. Insert a new 9V battery (type NEDA1604G, JIS006P, IEC6F22). Replace the cover and tighten the screws. Observe polarity.

What to do if the display remains stuck on 'OL' or 'InEr'?

'OL' means overload: manually select a higher range or switch to auto. 'InEr' indicates incorrect connection of test leads to the terminals (e.g., lead in the A terminal while voltage function is active). Disconnect and reconnect the leads correctly. If the problem persists, check the fuses.

How to use the electric field detection (EF) function?

Press the EF button for one second or more from any function. The device displays 'EF'. Place the antenna (top part of the device) near a live conductor. The field strength is indicated by bar graph segments and tones. For more precise detection, use the red test lead in direct contact with the conductor.

How to disable auto power off (APO)?

Hold the SELECT button while turning on the device (switch from OFF to ON). APO is disabled until the next power-off. You can also briefly press a button (SELECT, RANGE, REL, or HOLD) to reset the 30-minute timer.

How to measure high current (more than 600 mA)?

Use the A terminal (11A input). Select the current function (A) with the rotary switch. Choose DC or AC mode with SELECT. The maximum range is 10A continuous, but you can measure up to 20A for a maximum of 30 seconds with a 5-minute interval. Observe the fuse rated voltage (1000V).

What does the 'LoZ' symbol on the display mean?

'LoZ' indicates that the multimeter is in low impedance mode (about 3 kΩ initially). This mode is active in the AutoCheck™ function and helps eliminate ghost voltages by loading the circuit. Caution: this mode can damage sensitive circuits or cause high inrush current (up to 471 mA peak). Use normal voltage modes for delicate circuits.

How to connect the MD 9050 to a PC?

The MD 9050 has an optical port on the top. You need to purchase the optional AMD9050 kit which includes an optical-USB cable and software. Connect the kit to the optical port and to a USB port on the computer. Install the provided software for data transfer or remote control.

USER MANUAL MD 9050 Metrel

METREL MD 9040 & MD 9050

MD 9040 TRMS Industrial Digital Multimeter MD 9050 TRMS Heavy Duty Industrial Digital Multimeter

MD 9040 & MD 9050

User Manual

Bedienungsanleitung

Navodilo za uprabo

Unit 16, 1st Qtr Business Park

Blenheim Road

Epsom

Surrey

KT19 9QN,

Great Britain

E-mail: [e-mail]

Internet: http://www.metrel.co.uk

Mark on your equipment certifies that it meets requirements of all subjected EU regulations.

Hereby, Metrel d.d. declares that the MD 9040, MD 9050 is in compliance with subjected EU directive. The full text of the EU declaration of conformity is available at the following internet address http://www.metrel.si/DoC

The trade names Metrel®, Smartec®, Eurotest®, Auto Sequence® are trademarks registered in Europe and other countries.

No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL.

Table of contents/Inhalt/Vsebina/Table des matieres

English

1 Safety 5
2 Cenelec directives 6
3 Product Description 7
4 Operation 9
5 Maintenance 18
6 Specification 20

Deutsch

Terms in this manual

WARNING identifies conditions and actions that could result in serious injury or even death to the user.

CAUTION identifies conditions and actions that could cause damage or malfunction in the instrument.

This manual contains information and warnings that must be followed for operating the instrument safely and maintaining the instrument in a safe operating condition. If the instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired. The meter is intended only for indoor use.

The meter protection rating, against the users, is double insulation per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to Category IV 1000V AC & DC.

MD 9040 & MD 9050 Terminals (to COM) measurement category:

V/mAμA/A：Category IV 1000 Volts AC & DC

Per IEC61010-1 2nd Ed. (2001) Measurement Category

Measurement Category IV (CAT IV) is for measurements performed at the source of the low-voltage installation. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units.

Measurement Category III (CAT III) is for measurements performed in the building installation. Examples are measurements on distribution boards, circuit- breakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other equipment, for example, stationary motors with permanent connection to the fixed installation.

Measurement Category II (CAT II) is for measurements performed on circuits directly connected to the low voltage installation. Examples are measurements on household appliances, portable tools and similar equipment.

WARNING

To reduce the risk of fire or electric shock, do not expose this product to rain or moisture. To avoid electrical shock hazard, observe the proper safety precautions when working with voltages above 60 VDC or 30 VAC rms. These voltage levels pose a potential shock hazard to the user. Do not touch test lead tips or the circuit being tested while power is applied to the circuit being measured. Keep your fingers behind the finger guards of the test leads during measurement. Inspect test leads, connectors, and probes for damaged insulation or exposed metal before using the instrument. If any defects are found, replace them immediately. Do not measure any current that exceeds the current rating of the protection fuse. Do not attempt a current measurement to any circuit where the open circuit voltage is above the protection fuse voltage rating. Suspected open circuit voltage should be checked with voltage functions. Never attempt a voltage measurement with the test lead inserted into the A / mA or A input jack. Only replace the blown fuse with the proper rating as specified in this manual.

CAUTION

Disconnect the test leads from the test points before changing functions. Always set the instrument to the highest range and work downward for an unknown value when using manual ranging mode.

INTERNATIONAL ELECTRICAL SYMBOLS

Caution! Refer to the explanation in this Manual
Caution! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
日
AC--Alternating Current
DC--Direct Current

3 Product Description

Note: Top of the line model is used as representative for illustration purposes. Please refer to your respective model for function availability.

measurement like a traditional analog meter needle. It is excellent in detecting faulty contacts, identifying potentiometer clicks, and indicating signal spikes during adjustments.

Average sensing RMS calibrated

RMS (Root-Mean-Square) is the term used to describe the effective or equivalent DC value of an AC signal. Most digital multimeters use average sensing RMS calibrated technique to measure RMS values of AC signals. This technique is to obtain the average value by rectifying and filtering the AC signal. The average value is then scaled upward (calibrated) to read the RMS value of a sine wave. In measuring pure sinusoidal waveform, this technique is fast, accurate and cost effective. In measuring non-sinusoidal waveforms, however, significant errors can be introduced because of different scaling factors relating average to RMS values.

True RMS

True RMS is a term which identifies a DMM that responds accurately to the effective RMS value regardless of the waveforms such as: square, sawtooth, triangle, pulse trains, spikes, as well as distorted waveforms with the presence of harmonics. Harmonics may cause :

1) Overheated transformers, generators and motors to burn out faster than normal
2) Circuit breakers to trip prematurely
3) Fuses to blow
4) Neutrals to overheat due to the triplen harmonics present on the neutral
5) Bus bars and electrical panels to vibrate

Crest Factor

Crest Factor is the ratio of the Crest (instantaneous peak) value to the True RMS value, and is commonly used to define the dynamic range of a True RMS DMM. A pure sinusoidal waveform has a Crest Factor of 1.4. A badly distorted sinusoidal waveform normally has a much higher Crest Factor.

NMRR (Normal Mode Rejection Ratio)

NMRR is the DMM's ability to reject unwanted AC noise effect that can cause inaccurate DC measurements. NMRR is typically specified in terms of dB (decibel). This series has a NMRR specification of >60dB at 50 and 60Hz , which means a good ability to reject the effect of AC noise in DC measurements.

CMRR (Common Mode Rejection Ratio)

Common mode voltage is voltage present on both the COM and VOLTAGE input terminals of a DMM, with respect to ground. CMRR is the DMM's ability to reject common mode voltage effect that can cause digit rolling or offset in voltage measurements. This series has a CMRR specifications of >60dB at DC to 60Hz in ACV function; and >120dB at DC, 50 and 60Hz in DCV function. If neither NMRR nor CMRR specification is specified, a DMM's performance will be uncertain.

4 Operation

CAUTION

Before and after hazardous voltage measurements, test the voltage function on a known source such as line voltage to determine proper meter functioning.

AutoCheckTM (for MD9050 only)

This innovative AutoCheck™ feature automatically selects measurement function of DCV, ACV or Resistance () based on the input via the test leads.

• With no input, the meter displays "Auto" when it is ready.

• With no voltage signal but a resistance below 60M is present, the meter displays the resistance value. When below "Audible Threshold" is present, the meter further gives a continuity beep tone.

• When a signal above the threshold of 1.5V DC or 3V AC up to the rated 1000V is present, the meter displays the voltage value in appropriate DC or AC, whichever larger in peak magnitude.

Note:

*Range-Lock and Function-Lock Feature: When a measurement reading is being displayed in AutoCheck™ mode, press the RANGE or SELECT button momentarily 1 time can lock the range or function it was in. Press the button momentarily repeatedly to step through the ranges or functions.

*As Hazardous-A Alert: When making resistance measurements in AutoCheck™ mode, an unexpected display of voltage readings alerts you that the object under test is being energized.

*Ghost-voltage Buster: Ghost-voltages are unwanted stray signals coupled from adjacent hard signals, which confuse common multimeter voltage measurements. Our AutoCheck™ mode provides low (ramp-up) input impedance (approx. 3k at low voltage) to drain ghost voltages leaving mainly hard signal values on meter readings. It is an invaluable feature for precise indication of hard signals, such as distinguishing between hot and open wires (to ground) in electrical installation applications.

WARNING:

AutoCheckTM mode input impedance increases abruptly from initial 3k to a few hundred kΩ's on high voltage hard signals. "LoZ" displays on the LCD to remind the users of being in such low impedance mode. Peak initial load current, while probing 1000VAC for example, can be up to 471mA (1000V x 1.414 / 3kΩ), decreasing abruptly to approx. 3.1mA (1000V x 1.414 / 460kΩ) within a fraction of a second. Do not use AutoCheckTM mode on circuits that could be damaged by such low input impedance. Instead, use rotary selector high input impedance voltage modes to minimize loading for such circuits.

dBm ^+Hz (for MD9050 only), Hz ^+ACV , ACV ^+Hz functions

Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power up default for repeat measurement convenience.

Note: Hz Input sensitivity varies automatically with voltage (current function alike) range selected. 1V range has the highest and the 1000V range has the lowest. Auto-ranging measurements normally set the most appropriate trigger level. You can also press the RANGE button momentarily to select another trigger level (voltage range) manually. If the Hz reading becomes unstable, select higher voltage range to avoid electrical noise. If the reading shows zero, select lower voltage range.

Note: In dBm ^+Hz function, power up default reference impedance will be displayed for 1 second before displaying the dBm readings. Press dBm-Ω (RANGE) button momentary to select different reference impedance of 4, 8, 16, 32, 50, 75, 93, 110, 125, 135, 150, 200, 250, 300, 500, 600, 800, 900, 1000, up to 1200 . Last selection will be saved as power up default for repeat measurement convenience. Manual trigger level selection on Hz reading is not available.

DC+ACV +ACV(MD9050 only), DCV, DCV +ACV functions

Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power up default for repeat measurement convenience.

MD9050

DCmV, DcmV +ACmV, DC+ACmV +ACmV, Logic-Level & Duty%

Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power up default for repeat measurement convenience.

MD9040

DCmV, DCmV +ACmV, Logic-Level & Duty%

Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power up default for repeat measurement convenience.

ACmV^+Hz , dBm ^+Hz (MD9050 only), Hz ^+ACmV functions

Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power up default for repeat measurement convenience.

nS Conductance (MD9050 only), Resistance, Continuity functions

Press the SELECT button momentarily to select the subject functions in sequence for MD9050. Last selection will be saved as power up default for repeat measurement convenience. Direct rotary switch selection on Resistance and Continuous functions for the MD9040

Note: Conductance is the inverse of Resistance, that is S = 1 / or nS = 1 / G . It virtually extends the Resistance measurements to the order of Giga-Ohms for leakage measurements.

• Continuity function is convenient for checking wiring connections and operation of switches. A continuous beep tone indicates a complete wire.

CAUTION

Using resistance and continuity function in a live circuit will produce false results and may damage the instrument. In many cases the suspected component must be disconnected from the circuit to obtain an accurate reading

Temperature functions (for MD9050 only)

Press SELECT button momentarily to toggle between ^ C and ^ F readings. For Dual Channel Temperature function on the MD9050, press T1-T2 (RANGE) button momentarily can select T1, T2, T1 ^+T2 or T1-T2 ^+T2 readings. Last selection will be saved as power up default for repeat measurement convenience.

Note: Be sure to insert the banana plug type-K temperature bead probe AMD 9023 with correct polities. You can also use a plug adapter AMD 9024 (Optional purchase) with banana pins to type-K socket to adapt other standard type-K mini plug temperature probes.

Capacitance, biode test functions

Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power up default for repeat measurement convenience.

CAUTION

Discharge capacitors before making any measurement. Large value capacitors should be discharged through an appropriate resistance load.

Normal forward voltage drop (forward biased) for a good silicon diode is between 0.400V to 0.900V. A reading higher than that indicates a leaky diode (defective). A zero reading indicates a shorted diode (defective). An OL indicates an open diode (defective). Reverse the test leads connections (reverse biased) across the diode. The digital display shows OL if the diode is good. Any other readings indicate the diode is resistive or shorted (defective).

A , mA, and A Current functions

Press SELECT button momentarily to select DC, DC +AC, DC+AC +AC and AC +Hz. Last selection will be saved as power up default for repeat measurement convenience.

*Note: When measuring a 3-phase system, special attention should be taken to the phase-to-phase voltage which is significantly higher than the phase-to-earth voltage. To avoid exceeding the voltage rating of the protection fuse(s) accidentally, always consider the phase-to-phase voltage as the working voltage for the protection fuse(s).

Electric Field EF-Detection (MD9050 only)

At any function, press the EF button for one second or more to toggle to EF-Detection feature. The meter displays "E.F." when it is ready. Signal strength is indicated as a series of bar-graph segments on the display plus variable beep tones.

• Non-Contact EF-Detection: An antenna is located along the top of the meter, which detects electric field surrounds current-carrying conductors. It is ideal for tracing live wiring connections, locating wiring breakage and to distinguish between live or earth connections.
• Probe-Contact EF-Detection: For more precise indication of live wires, such as distinguishing between live and ground connections, use the Red (+) test probe for direct contact measurements.

PC computer interface capabilities

The instrument equips with an optical isolated interface port at the meter back for data communication. Optional purchase PC USB interface kit AMD9050 is required to connect the meter to the PC computer.

MAX/MIN/AVG (REC) at fast 20/s measurement mode (MD9050 only)

Press REC button momentarily to activate MAX/MIN/AVG recording mode. The LCD "R" & "MAX MIN AVG" turn on, and the reading update rate will be increased to 20/second. The meter beeps when new MAX (maximum) or MIN (minimum) reading is updated. AVG^* (Average) reading is calculated over time. Press the button momentarily to read the MAX, MIN, MAX-MIN and AVG readings in sequence. Press the button for 1 second or more to exit MAX/MIN/AVG recording mode. Auto-ranging remains, and Auto-Power-Off is disabled automatically in this mode.

1ms CREST capture mode (MD9050 only)

Press CREST button momentarily to activate CREST (Instantaneous Peak-Hold) mode to capture voltage or current signal duration as short as 1ms. The LCD "C" & "MAX" turn on. The meter beeps when new MAX (maximum) or MIN (minimum) reading is updated. Press the button momentarily to read the MAX, MIN, and MAX-MIN (Vp-p) readings in sequence. Press the button for 1 second or more to exit CREST mode. Auto-ranging (up range) remains, and Auto-Power-Off is disabled automatically in this mode.

Backlighted display (MD9050 only)

Press the SELECT button for 1 second or more to toggle the LCD backlight. The backlight will also be turned off automatically after 32 seconds to extend battery life.

Beep-Jack™ Input Warning

The meter beeps as well as displays "InEr" to warn the user against possible damage to the meter due to improper connections to the A , mA, or A input jacks when other function (like voltage function) is selected.

Hold

The hold feature freezes the display for later view. Press the HOLD button momentarily to toggle the hold feature.

Relative Zero mode

Relative zero allows the user to offset the meter consecutive measurements with the displaying reading as the reference value. Practically all displaying readings can be set as relative reference value including MAX/MIN/AVG readings. Press the button momentarily to toggle relative zero mode.

Manual or Auto-ranging

Press the RANGE button momentarily to select manual-ranging, and the meter will remain in the range it was in, the LCD tALTOff. Press the button momentarily again to step through the ranges. Press and hold the button for 1 second or more to resume auto-ranging.

Note: Manual ranging feature is not available in Hz function.

Set Beeper Off

Press the RANGE button while turning the meter on to temporarily disable the Beeper feature. Turn the rotary switch OFF and then back on to resume.

Auto-Power-off (APO)

The Auto-Power-off (APO) mode turns the meter off automatically to extend battery life after approximately 30 minutes of no activities. Activities are specified as: 1) Rotary switch or push button operations, and 2) Significant measuring readings of above 512 counts or non-OL readings. In other words, the meter will intelligently avoid entering the APO mode when it is under normal measurements.. To wake up the meter from APO, press the SELECT, RANGE, RELATIVE or HOLD button momentarily or turn the rotary switch OFF and then back on. Always turn the rotary switch to the OFF position when the meter is not in use

Disabling Auto-Power-off

Press the SELECT button while turning the meter on to temporarily disable the AutoPower-Off feature. Turn the rotary switch OFF and then back on to resume.

5 Maintenance

WARNING

To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input jacks and turn OFF the meter before opening the case. Do not operate with open case. Install only the same type of fuse or equivalent

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If the meter is not to be used for periods of longer than 60 days, remove the battery and store it separately

Trouble Shooting

If the instrument fails to operate, check battery, fuses, leads, etc., and replace as necessary. Double check operating procedure as described in this user's manual

If the instrument voltage-resistance input terminal has subjected to high voltage transient (caused by lightning or switching surge to the system) by accident or abnormal conditions of operation, the series fusible resistors will be blown off (become high impedance) like fuses to protect the user and the instrument. Most measuring functions through this terminal will then be open circuit. The series fusible resistors and the spark gaps should then be replaced by qualified technician. Refer to the LIMITED WARRANTY section for obtaining warranty or repairing service.

Battery and Fuse replacement

Battery use: Single 9V battery; NEDA1604G, JIS006P IEC6F22, NEDA1604A, JIS6AM6 or IEC6LF22

Fuses use:

MD 9040 and 9050:

Fuse (FS1) for AmA current input:

0.44A/1000Vac & Vdc, IR 10kA or better, F fuse; Dimension: 10 × 38 mm

Fuse (FS2) for A current input:

11A/1000Vac & Vdc, IR 20kA or better, F fuse; Dimension: 10 × 38 mm

Battery replacement:

Loosen the 2 screws from the battery access door of the case bottom. Lift the battery access door and thus the battery compartment up. Replace the battery. Re-fasten the screws.

Fuse replacement:

Loosen the 4 screws from the case bottom. Lift the end of the case bottom nearest the input jacks until it unsnaps from the case top. Replace the blown fuse(s). Replace the case bottom, and ensure that all the gaskets are properly seated and the two snaps on the case top (near the LCD side) are engaged. Re-fasten the screws.

6 Specification

General Specifications

Display: 9999 counts: ACV, DCV, Hz & nS

6000 counts: mV, A, mA, A, Ohm & Capacitance

Polarity: Automatic

Update Rate: Digital Display: 5 per second nominal;

41 Segments Bar-graph: 60 per second max

Low Battery: Below approx. 7V

Operating Temperature: 0 ^ C to 45^ C

Relative Humidity: Maximum relative humidity 80% for temperature up to 31 °C decreasing linearly to 50% relative humidity at 45^

Pollution degree: 2

Storage Temperature: -20 ^ C to 60^ < 80% R.H. (with battery removed)

Altitude: Operating below 2000m

Temperature Coefficient: nominal 0.15 × (specified accuracy)/ ^ C @ (0^ C 18^ C or 28^ C 45^ C) , or otherwise specified

Sensing: MD 9050: AC+DC True RMS

MD 9040: AC True RMS

Safety: Double insulation IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to Category IV 1000Vac & Vdc.

Transient protection: 12kV (1.2/50μs surge)

MD 9040 & MD 9050 Terminals (to COM) Measurement Category:

V/A/mAμA: Category IV 1000Vac & Vdc

Overload Protections:

MD 9050, MD 9040:

A\& mA .. 0.44A/1000Vac & Vdc, IR 10kA or better, F fuse

A: 11A/1000Vac & Vdc, IR 20kA or better, F fuse

V, mV, Ω, & Others: 1050Vrms, 1450Vpeak

E.M.C.: Meets EN61326-1:2006 (EN55022, EN61000-3-2, EN61000-

3-3, EN61000-4-2, EN61000-4-3, EN61000-4-4, , EN61000-

4-5, EN61000-4-6, EN61000-4-8, EN61000-4-11)

In an RF field of 3V / m

Capacitance function is not specified

Other function ranges:

Total Accuracy = Specified Accuracy + 100 digits

Performance above 3V / m is not specified

Power Supply: Single 9V battery; NEDA1604G, JIS006P IEC6F22, NEDA1604A, JIS6AM6 or IEC6LF22

Power Consumption: 5 mA typical

APO Timing: Idle for 30 minutes

APO Consumption: 50 A typical

Dimension: L208mm X W103mm X H64.5mm with holster

Weight: 635 gm with holster

Accessories:

Test lead pair; battery installed; user's manual; AMD9023 banana plug type-K thermocouple (MD 9050)

Optional purchase accessories: USB interface kit AMD9050; AMD9024 banana plug to type-K socket plug adaptor

Electrical Specifications

Accuracy is ± (% reading digits ^+ number of digits) or otherwise specified, at 23^± 5^ & less than 75% relative humidity.

True RMS voltage & current accuracies are specified from 10% to 100% of range or otherwise specified. Maximum Crest Factor < 3:1 at full scale \& < 6:1 at half scale, and with frequency components within the specified frequency bandwidth for non-sinusoidal waveforms.

AC & AC+DC Voltage

Function	RANGE	Accuracy
50Hz ~ 60Hz
mV	60.00mV,600.0mV	0.5% + 3d
V	9.999V, 99.99V,999.9V
40Hz ~ 500Hz
mV	60.00mV,600.0mV	0.8% + 4d
V	9.999V, 99.99V	1.0%+4d
	999.9V	2.0%+4d
500Hz ~ 1kHz
mV	60.00mV,600.0mV	2.0% + 3d
V	9.999V, 99.99V	1.0%+4d
	999.9V	2.0%+4d
1kHz ~ 3kHz
mV	60.00mV,600.0mV	2%+3d
V	9.999V, 99.99V,999.9V	3.0%+4d
3kHz ~ 20kHz
mV	60.00mV1),600.0mV1)	2%+3d
V	9.999V, 99.99V	3dB
	999.9V	Unspec'd

1)Specficied from 30% to 100% of range.
CMRR: >60dB @ DC to 60Hz,
Rs=1kΩ
Input Impedance: 10M 50pF nominal
(80pF nominal for 600mV range)
Residual reading less than 5 digits with test leads shorted.

Audible Continuity Tester

Audible threshold: between 20 and

300Ω; Response time < 100 s

AutoCheck™ (ACV)

RANGE 1)	Accuracy
50Hz ~ 60Hz
9.999V, 99.99V, 999.9V	1.0%+4d

Lo-Z ACV Threshold:

3VAC (50/60Hz) nominal
Lo-Z ACV Input Impedance:
Initially approx. 3.0k 150pF nominal;
Impedance increases abruptly within a

fraction of a second as display voltage

is above 50V (typical). Ended up

impedances vs display voltages

typically are:

18kΩ @100V

125kΩ @ 300V

320kΩ @ 600V

460kΩ @ 1000V

DC Voltage

Function	RANGE	Accuracy
mV	60.00mV	0.12%+2d
	600.0mV	0.06%+2d
V	9.999V, 99.99V, 999.9V	0.08%+2d

NMRR: >60dB @ 50/60Hz
CMRR: >110dB @ DC, 50/60Hz,
Rs=1kΩ
Input Impedance: 10M 50pF nominal
(80pF nominal for 600mV range)

dBm

At 600 -11.76dBm to 54.25dBm,

Accuracy: ± 0.25dB + 2d (@40Hz --

20kHz)

Input Impedance: 10M 50pF nominal

Selectable reference impedance of 4, 8,

16,32,50,75,93,110,125,135,150

200, 250, 300, 500, 600, 800, 900, 1000,

1200Ω

AutoCheck™ (DCV)

RANGE	Accuracy
9.999V, 99.99V, 999.9V	0.5%+3d

Lo-Z DCV Threshold:

+1.5VDC or < -1.0VDC nominal
Lo-Z DCV Input Impedance:
Initially approx. 3.0k 165pF nominal;
Impedance increases abruptly within
fraction of a second as display voltage
is above 50V (typical). Ended up
impedances vs display voltages
typically are:
18kΩ @100V
125kΩ @ 300V
320kΩ @ 600V
500kΩ @ 1000V

Ohms

RANGE	Accuracy
600.0Ω, 6.000kΩ, 60.00kΩ, 600.0kΩ	0.1%+3d
6.000MΩ	0.4%+3d
60.00MΩ	1.5%+5d
99.99nS	0.8%+10d

Open Circuit Voltage: < 1.2VDC (< 1.0VDC for 60MΩ range)

AutoCheck™ (Ohms)

RANGE	Accuracy
600.0Ω, 6.000kΩ, 60.00kΩ, 600.0kΩ	0.5%+4d
6.000MΩ	0.8%+3d
60.00MΩ	2.0%+5d

Open Circuit Voltage: < 1.2VDC (< 1.0VDC for 60MΩ range)

Crest mode (Instantaneous Peak Hold)

Accuracy: Specified accuracy adds 250 digits for changes >1.0 ms in duration

Diode Tester

RANGE	Accuracy
2.000V	1.0%+1d

Test Current (Typically): 0.4mA Open Circuit Voltage: < 3.5 VDC

Temperature

RANGE	Accuracy
-50°C to 1000°C	0.3%+2°C
-58°F to 1832°F	0.3%+5°F

Type-K thermocouple range & accuracy not included

Capacitance

RANGE	Accuracy1)
60.00nF, 600.0nF	0.8% + 3d
6.000μF	1.0% + 3d
60.00μF	2.0% + 3d
600.0μF2)	3.5% + 5d
6.000mF2)	5.0% + 5d
25.00mF2)	6.5% + 5d

1)Accuracies with film capacitor or better 2)In manual-ranging mode, measurements not specified below

50.0μF, 0.54mF and 5.4mF for 600.0μF, 6.000mF and 25.00mF ranges respectively

DC Current

RANGE	Accuracy	Burden voltage
600.0μA, 6000μA	0.2%+4d	0.08mV/μA
60.00mA, 600.0mA		2.1mV/mA
6.000A, 10.00A1)		0.02V/A

1)10A continuous, >10A to 20A for 30 second max with 5 minutes cool down interval

AC & AC+DC Current

RANGE	Accuracy	Burden voltage
50Hz ~ 60Hz
600.0μA,6000μA	0.6%+3d	0.08mV/μA
60.00mA		2.1mV/mA
600.0mA	1.0%+3d
6.000A,10.00A 1)	0.8%+6d	0.02V/A
40Hz ~ 1kHz
600.0μA,6000μA	0.8%+4d	0.08mV/μA
60.00mA		2.1mV/mA
600.0mA	1.0%+4d
6.000A,10.00A 1)	0.8%+6d	0.02V/A

1)10A continuous, >10A to 20A for 30 second max with 5 minutes cool down interval

Line Level Frequency (Hz)

Function Range	Frequency	Sensitivity (Sine RMS)
AC 60.00mV	15.00 ~ 50.00kHz	40mV
AC 600.0mV		60mV
AC 9.999V	15.00 ~ 10.00kHz	2.5V
AC 99.99V		25V
AC 999.9V		100V
AC 600.0μA		45uA
AC 6000μA		600uA
AC 60.00mA	15.00 ~ 3.000kHz	40mA
AC 600.0mA		60mA
AC 6.000A		4A
AC 10.00A		6A

Accuracy: 0.04% + 4d

Logic Level Frequency (J&z) & Duty Cycle (D%)

@ DCmV Function	Range	Accuracy 1)
Frequency	5.00Hz ~ 1.000MHz	0.004%+4d
Duty Cycle	0.00% ~ 100.0%	3d/kHz+2d 2)

Sensitivity: 2.5Vp (Square wave) for 3V
& 5V Logic Family
2) Specified Frequency: 5Hz ~ 10kHz

Non-Contact EF-Detection

Typical Voltage	Bar Graph Indication
20V (tolerance:10V~36V)	-
55V (tolerance: 23V ~ 83V)	--
100V (tolerance: 59V ~ 165V)	---
220V (tolerance: 124V ~ 330V)	----
440V (tolerance: > 250V)	-----

Indication: Bar graph segments & audible beep tones proportional to the field strength

Detection Frequency: 50/60Hz

Detection Antenna: Top end of the meter

Probe-Contact EF-Detection:

For more precise indication of live wires, such as distinguishing between live and ground connections, use the Red (+) test probe for direct contact measurements.

Record mode

Accuracy: Specified accuracy adds 10 digits for changes >100 ms in duration

LIMITED WARRANTY

This equipment is warranted against any defects of manufacture or materials.

During the warranty period (2 years), defective parts will be replaced, the manufacturer reserving the right to repair or replace the product. In the event of the equipment being returned to the after sale department or to a local agency, the outward transport is payable by the consignor. For delivery indicate, by means of an enclosed note, as clear as possible, the reasons for returning it. Any damage caused by shipment using not original packing will be charged in any case to the consignor.

The manufacturer will not be responsible for any damage to persons or things.

The warranty is not valid in the following cases:

• Accessories and battery are not included in warranty.
• Repairs following unsuitable use of the equipment.
• Repairs necessitated by attempts to repair by a person not approved by the manufacturer.
• Modification of the equipment without the explicit authorisation of the manufacturer.
• Adaptation to a specific application not provided for in the specifications of the equipment or the user manual.
• Damage after a drop, a shock or flooding.

The contents of this manual must not be reproduced in any form whatsoever without the consent of the manufacturer.

Service

The life span of the equipment is 7 years. If the equipment should not work properly, before the service, test the battery conditions, the test leads, etc., and change them if necessary.

If the equipment still does not work check if your operating procedure agrees with the latter described in this manual.

In the event of returning the equipment it must be re-sent to the after-sales service of the local Metrel distributor, the outward transport is payable by customer. The delivery must be agreed in advance with consignee. For delivery indicate, by means of an enclosed note, as clear as possible, the reasons for returning it. Use only the original packing. Any damage caused by delivery with NO original packing will be charged in any case to the consignor.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTYES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE. METREL WILL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

PRINTED ON RECYCLABLE PAPER, PLEASE RECYCLE

1 Sicherheit

AC in AC+DC Napetost

Funkcija	Območje	NDP
50 Hz ~ 60 Hz
mV	60.00 mV, 600.0 mV	0.5 % + 3 digiti
V	9.999 V, 99.99 V, 999.9 V
40 Hz ~ 500 Hz
mV	60.00 mV, 600.0 mV	0.8 % + 4 digiti
V	9.999 V, 99.99 V	1.0 % + 4 digiti
	999.9 V	2.0 % + 4 digiti
500 Hz ~ 1 kHz
mV	60.00 mV, 600.0 mV	2.0 % + 3 digiti
V	9.999 V, 99.99 V	1.0 % + 4 digiti
	999.9 V	2.0 % + 4 digiti
1 kHz ~ 3 kHz
mV	60.00 mV, 600.0 mV	2 % + 3 digiti
V	9.999 V, 99.99 V, 999.9 V	3.0 % + 4 digiti
3 kHz ~ 20 kHz
mV	60.00 mV1), 600.0 mV1)	2 % + 3 digiti
V	9.999 V, 99.99 V	3 dB
	999.9 V	Nepodan

NMRR: >60 dB @ 50/60 Hz

CMRR: >110 dB @ DC, 50 / 60 Hz, Rs = 1 kΩ

At 600 Ω, -11.76 dBm to 54.25 dBm,

NDP: ±0.25 dB + 2 d (@40 Hz - 20 kHz)

Vhodna impedanca: 10 MΩ, 50 pF nazivno

Referenčno impedanco se izbere izmed 4, 8, 16, 32, 50, 75, 93, 110, 125, 135, 150, 200, 250, 300, 500, 600, 800, 900, 1000, 1200 Ω

NDP: 0.04% + 4 digiti

Frekvenca logicneganivoja (Ez) & Razmerje sirin (D%)

@ funkciji DCmV	Območje	NDP 1)
Frekvenca	5.00 Hz ~ 1.000 MHz	0.004 % + 4 digiti
Razmerje širin	0.00 % ~ 100.0 %	3 d/kHz + 2 digita 2)

1)Obcutljivost: 2.5 Vp (pravokotna oblika) za 3 V & 5 V logiko
2Frekvencno obmoce: 5Hz 10kHz

2 Directives Cenelec

Perception: MD 9050: AC+DC True RMS MD 9040: AC True RMS

Sécurité: Double isolation pour IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 & CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to to Catégorie IV 1000Vac & Vdc.

Protection transitoire: 12kV (1.2/50μs de survoltage)

a 600 -11.76dBm to 54.25dBm,

Precislon: ± 0.25dB + 2d (@40Hz -- 20kHz)

Impedance d'entree: 10MΩ, 50pF nominal

RANGE	Accuracy
9.999V, 99.99V, 999.9V	0.5%+3d

Seuil Lo-Z DCV:

+1.5VDC or < -1.0VDC nominal

Non-Contact EF-Detection

Tension	Indication du bargraph
20V (tolerance:10V~36V)	-
55V (tolerance: 23V ~ 83V)	--
100V (tolerance: 59V ~ 165V)	---
220V (tolerance: 124V ~ 330V)	----
440V (tolerance: > 250V)	--------