MD 9050 - Multimeter Metrel - Free user manual and instructions

USER MANUAL MD 9050 Metrel

METREL MD 9040 & MD 9050

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.MD 9040 & MD 9050 Digitalmultimeter Table of contents/ Inhalt

1 Safety 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 / mAA / 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.MD 9040 & MD 9050 Digital multimeter Safety/Cenelec directives

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.

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

2 Cenelec directives The instruments conform to CENELEC Low-voltage directive 2006/95/EC and Electromagnetic compatibility directive 2004/108/ECMD 9040 & MD 9050 Digital multimeter Product Description

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.

special functions & features

3) Selector to turn the

functions EXCEPT current (A, mA, A) functions

amp and micro-amp current functions

Analog bar-graph The analog bar graph provides a visual indication of measurement like a traditional analog meter needle. It is excellent in detecting faulty contacts, identifying potentiometer clicks, and indicating signal spikes during adjustments.MD 9040 & MD 9050 Digital multimeter Product Description

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

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.MD 9040 & MD 9050 Digital multimeter Operation

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.

(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-Alert: When making resistance measurements in AutoCheck

mode, an unexpected display of voltage readings alerts you that the object under test is being energized.MD 9040 & MD 9050 Digital multimeter Operation

*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. 3kΩ 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.

mode input impedance increases abruptly from initial 3kΩ 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 AutoCheck

mode on circuits that could be damaged by such low input impedance. Instead, use rotary selector or 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- (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.MD 9040 & MD 9050 Digital multimeter Operation

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 Hz & 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 Hz & 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.MD 9040 & MD 9050 Digital multimeter Operation

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 Continuity 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.MD 9040 & MD 9050 Digital multimeter Operation

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 polarities. 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.MD 9040 & MD 9050 Digital multimeter Operation

Capacitance, Diode 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.MD 9040 & MD 9050 Digital multimeter Operation

*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.MD 9040 & MD 9050 Digital multimeter Operation

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 turns off. 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.MD 9040 & MD 9050 Digital multimeter Operation

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 Auto- Power-Off feature. Turn the rotary switch OFF and then back on to resume.MD 9040 & MD 9050 Digital multimeter Maintenance

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 x 38 mm Fuse (FS2) for A current input: 11A/1000Vac & Vdc, IR 20kA or better, F fuse; Dimension: 10 x 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.MD 9040 & MD 9050 Digital multimeter Maintenance 19MD 9040 & MD 9050 Digital multimeter Specification

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

Relative Humidity: Maximum relative humidity 80% for temperature up to 31

decreasing linearly to 50% relative humidity at 45

Pollution degree: 2 Storage Temperature: -20

C, < 80% R.H. (with battery removed) Altitude: Operating below 2000m Temperature Coefficient: nominal 0.15 x (specified accuracy)/

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: 50A 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

C & 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.MD 9040 & MD 9050 Digital multimeter Specification

9.999V, 99.99V 3dB 999.9V Unspec’d

Specificied from 30% to 100% of range. CMRR: >60dB @ DC to 60Hz, Rs=1k 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 300; Response time < 100s AutoCheck

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: 18k @100V 125k @ 300V 320k @ 600V 460k @ 1000V DC Voltage Function RANGE Accuracy

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 a fraction of a second as display voltage is above 50V (typical). Ended up impedances vs display voltages typically are: 18k @100V 125k @ 300V 320k @ 600V 500k @ 1000VMD 9040 & MD 9050 Digital multimeter Specification

Accuracy 2.000V 1.0%+1d Test Current (Typically): 0.4mA Open Circuit Voltage: < 3.5 VDC Temperature RANGE

Type-K thermocouple range & accuracy not included Capacitance RANGE

Accuracies with film capacitor or better

In manual-ranging mode, measurements not specified below 50.0F, 0.54mF and 5.4mF for 600.0F, 6.000mF and 25.00mF ranges respectively DC Current RANGE

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

Accuracy: 0.04%+4d Logic Level Frequency ( Hz) & Duty Cycle (D%) @ DCmV Function Range Accuracy

Specified Frequency: 5Hz ~ 10kHz

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 durationMD 9040 & MD 9050 Digitalmultimeter Limited warranty

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 WARRANTIES, 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 RECYCLEMD 9040 & MD 9050 Digitalmultimeter Sicherheit

9.999V, 99.99V 3dB 999.9V Unspec’d