METREL MD 9030 True RMS Electrical and Electronic Bench and Field Service Digital Multimeter with Temperature User Manual
- June 5, 2024
- METREL
Table of Contents
- METREL MD 9030 True RMS Electrical and Electronic Bench and Field Service
- 1 Safety
- PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY
- OVERVOLTAGE CATEGORY III
- TERMS IN THIS MANUAL
- WARNING
- CAUTION
- INTERNATIONAL ELECTRICAL SYMBOLS
- 2 Cenelec Directives
- 3 Product Description
- 4 Operation
- Note:
- Ω Resistance, and Continuity functions
- CAUTION
- CAUTION
- μA, mA, and A Current functions
- CAUTION
- Beep-Jack™ Input Warning
- Relative zero mode
- Backlighted display
- Manual or Auto-ranging
- HOLD
- The hold feature freezMAX
- Sleep Mode
- Cleaning and Storage
- Trouble Shooting
- 6 Specification
- Overload Protections :
- Protection-reinforced CE + UL version MD9030 series:
- Low Battery: Below approx. 2.4V
- Electrical Specifications
- DC Voltage
- AC Voltage
- DC Current
- Diode Tester
- Ohms
- Capacitance
- Hz Frequency
- Sensitivity :
- LIMITED WARRANTY
- Read More About This Manual & Download PDF:
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
METREL MD 9030 True RMS Electrical and Electronic Bench and Field Service
Digital Multimeter with Temperature User Manual
1 Safety
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 (all versions) is protected, against the users, by double insulation
per UL3111-1(1994), CSA C22.2 No. 1010-1-92, EN61010-1(1995) and
IEC61010-1(1995) to CAT III 600V.
Standard CE version MD 9030 series Terminals (to COM) ratings:
- V : Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
- A / mAμA : Category II 250 Volts ac and 150 Volts dc.
Protection-reinforced CE + UL version MD 9030 series Terminals (to COM)
ratings:
- V : Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
- A / mAμA :Category III 500 Volts AC and 300 Volts dc.
PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY
OVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be
supplied from the fixed installation.
Note – Examples include household, office, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.
Note – Examples include switches in the fixed installation and some equipment
for industrial use with permanent connection to the fixed installation.
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.
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 circuit that draws more than the current
rating of the protection fuse. Do not attempt a current measurement where the
open circuit voltage is above the protection fuse voltage rating.
Suspected open circuit voltage can be checked with voltage functions. Never
attempt a voltage measurement with the test lead inserted into the μA/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
2 Cenelec Directives
The instruments conform to CENELEC Low-voltage directive 73/23/EEC and
Electromagnetic compatibility directive 89/336/EEC
3 Product Description
This user’s manual uses only representative model for illustrations. Please refer specification details for function availability to each model.
4 Operation
DC Voltage, AC Voltage, & Hz Frequency functions
Note:
AC 400.0mV range selection is by RANGE button manually, and is specified from
AC 10mV (AC 40mV for True RMS model BM807) and up.
DC 400.0mV range is designed with 1000MΩ high input impedance for least
current drain in measuring small signals, and can cope better with most
commercially available voltage output transducers and adapters. The non-zero
display reading is normal when the meter inputs are open circuit, which will
not affect actual measurement accuracy.
Open input is actually a floating condition, which is not a zero-volt-input
condition. The meter will show zero or close to zero reading when the inputs
are shorted.
Ω Resistance, and Continuity functions
Defaults at Ω. Press SELECT button momentarily to select Continuity function
which is convenient for checking wiring connections and operation of switches.
A continuous beep tone indicates a complete wire.
display shows OL if the diode is good. Any other readings indicate the diode
is resistive or shorted (defective).
CAUTION
Using Resistance, Continuity, Diode or Capacitance 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 measurement reading.
Diode test, Capacitance functions
Defaults at Ω. Press SELECT button momentarily 2 times to select Diode test
function. 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).
Defaults at Ω. Press SELECT button momentarily 3 times to select Capacitance
function. Relative zero mode can be used to zero out the parasitic capacitance
of the leads and the internal protection circuitry of the meter when measuring
low capacitance in the order of Pico Farad (pF).
CAUTION
Discharge capacitors before making any measurement. Large value capacitors should be discharged through an appropriate resistance load
μA, mA, and A Current functions
Default at DC. Press SELECT button momentarily to select AC.
CAUTION
When measuring a 3-phase system, special attention should be taken to the phase-tophase 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).
Beep-Jack™ Input Warning
The meter beeps to warn the user against possible damage to the meter due to
improper connections to the μA, mA, or A input jacks when other function (like
voltage function) is selected.
Temperature function Be sure to insert the banana plug type-K temperature bead
probe AMD9023 (Optional purchase) with correct polarities. Defaults at degree
C (Celsius). Press SELECT button momentarily to select degree F (Fahrenheit).
You can also use a plug adapter AMD 9024 (Optional purchase) with banana pins
to type-K socket to adapt other type-K standard mini plug temperature probes.
Relative zero mode
Relative zero mode allows the user to offset the meter consecutive measurements with the displaying reading as the reference value. The display will now show readings relative to the stored reference value. That is, display = reading – stored value. Press the button momentarily to activate or to exit relative zero mode.
Backlighted display
Press the SELECT button for 1 second or more to turn on or off the display backlight function.
Manual or Auto-ranging
Press the RANGE button momentarily to select manual-ranging mode, and the
meter will remain in the range it was in, the LCD annunciator 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 mode.
Note: Manual ranging mode feature is not available in Hz & Cx functions.
HOLD
The hold feature freezMAX
The max feature compares and displays the measured maximum value as fast as
25ms n a single range, and with automatic up range capability. Press the MAX
button for 1
second or more to activate or to exit the max feature in the voltage or
current functions.es the display for later view. Press the HOLD button
momentarily to activate or to exit the hold feature.
Sleep Mode
The meter will enter a low power consumption sleep mode automatically to extend battery life after approximately 30 minutes of no rotary-switch or push button operations. To wake up the meter from sleep mode, press any buttons momentarily or turn the rotary-switch to an adjacent position. Always set the rotary-switch to the OFF position manually when the meter is not in use.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.
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 batteries and store them separately
Trouble Shooting
If the instrument fails to operate, check batteries and test 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: Standard 1.5V AAA Size (NEDA 24A or IEC LR03) battery
X 2
Standard CE Version MD 9030 series fuses: Fuse (FS1) for μAmA current input:
0.5A/250V, F fuse; Fuse (FS2) for A current input: 15A/250V, F fuse
Protection-reinforced CE + UL Version MD 9030 series fuses:
Fuse (FS1) for μAmA current input: 0.63A/500V, IR 200kA, F fuse; Fuse (FS2)
for A current input: 12.5A/500V, IR 20kA, F fuse
Battery replacement for models with battery access door: 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 (and also Battery replacement for splash proof
version without battery access door): 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) and/or the
battery. 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: 3-3/4 digits 4000 counts LCD display
Polarity: Automatic
Update Rate: 3 per second nominal
Operating Temperature: 0°C to 40°C
Relative Humidity: Maximum relative humidity 80% for temperature up to 31°C
decreasing
linearly to 50% relative humidity at 40°C
Altitude: Operating below 2000m
Pollution degree: 2
Storage Temperature: -20OC to 60OC, < 80% R.H. (with battery removed)
Temperature Coefficient: nominal 0.15 x (specified accuracy)/OC @(0OC -18OC or
28OC -40OC), or
otherwise specified
Sensing: True RMS for MD 9030
Safety: The meter (all versions) is protected, against the users, by double
insulation per UL3111-1(1994), CSA C22.2 No. 1010-1-92, EN61010-1(1995) and
IEC61010-1(1995) to CAT II 1000V & CAT III 600V.
Standard CE version MD 9030 series Terminals (to COM) ratings:
- V :Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
- A / mAμA :Category II 250 Volts ac and 150 Volts dc.
Protection-reinforced CE + UL version series Terminals (to COM) ratings:
- V :Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
- A / mAμA :Category III 500 Volts AC and 300 Volts DC.
Overload Protections :
Standard CE MD9030 version series:
- μA & mA : 0.5A/250V F Fuse;
- A : 15A/250V F Fuse;
- V : 1050Vrms, 1450Vpeak;
- Ω, & Others: 600VDC/VAC rms
Protection-reinforced CE + UL version MD9030 series:
- μA & mA : 0.63A/500V, IR200kA, F Fuse;
- A : 12.5A/500V, IR20kA, F Fuse;
- V : 1050Vrms, 1450Vpeak;
- Ω, & Others: 600VDC/VAC rms
Transient protection: 6.5kV (1.2/50μs surge)
Power Supply: 1.5V AAA Size (NEDA 24A or IEC LR03) battery X 2
Power Consumption: 3.2 mA typical
Low Battery: Below approx. 2.4V
E.M.C.: Meets EN61326(1997, 1998/A1), EN61000-4-2(1995), and EN61000-4-3(1996)
In an RF field of 3V/m:
- Capacitance function is not specified
- AC 4.000V range: Total Accuracy = Specified Accuracy + 700 digits
- AC 400.0μA range: Total Accuracy = Specified Accuracy + 300 digits
- Other function ranges: Total Accuracy = Specified Accuracy + 40 digits
- Performance above 3V/m is not specified
Electrical Specifications
Accuracy is ±(% reading digits + number of digits) or otherwise specified, at
23 OC ±5 OC & less than 75% R.H. Model MD 9030 True RMS accuracy of ACV & ACA
is specified from 5 % (10% for AC400.0mV range) to 100 % of range, or
otherwise specified. Maximum Crest Factor < 1.75 : 1 at full scale & < 3.5 : 1
at half scale, and with frequency components within the specified frequency
bandwidth for non-sinusoidal
waveforms
DC Voltage
RANGE | Accuracy |
---|---|
400.0 MV | 0.3% + 4D |
4.000V, 40.00V,
400.0V
| 0.5% + 3D
1000V| 1.0% + 4D
NMRR:>50dB @ 50/60Hz
CMRR:>120dB @ DC, 50/60Hz, Rs=1kΩ
Input impedance : 10MΩ, 30pF nominal
(1000MΩ for 400.0mV range)
Max Hold (Voltage & Current)
Specified accuracy ± 50 digits for changes > 25ms in duration
AC Voltage
RANGE | Accuracy |
---|
50HZ — 500HZ
400.0mV*| 4.0% + 5d
4.000V, 40.00V,
400.0V
| 1.5% + 5d
1000V| 4.0% + 5d
CMRR:>60dB @ DC TO 60Hz, RS=1kW
Input Impedance: 10MW, 30pF nominal (1000MW for 400.0mV range)
*Selection by RANGE button manually, and is specified from AC 10mV (AC 40mV for True RMS model MD 9030) and up
DC Current
RANGE | Accuracy 1) | Burden Voltage |
---|
50Hz — 500Hz
400.0mA| 2.0% + 6d| 0.15mV/mA
4000mA| 1.5% + 4d| 0.15mV/mA
40.00mA| 2.0% + 6d| 3.3mV/mA
400.0mA| 1.7% + 4d| 3.3mV/mA
4.000A| 2.0% + 6d| 0.03V/A
10.00A*| 1.8% + 4d| 0.03V/A
10A continuous, 20A for 30 second max with 5 minutes cool down interval
Diode Tester
Open Circuit Voltage | Test Current (Typical) |
---|---|
< 1.6 VDC | 0.25mA |
Ohms
RANGE | Accuracy |
---|---|
400.0W | 0.8% + 6d |
4.000kW, 40.00kW,
400.0kW
| 0.6% + 4d
4.000MW| 1.0% + 4d
40.00MW| 2.0% + 4d
Capacitance
**RANGE*** | Accuracy** |
---|
500.0nF, 5.000mF,
50.00mF, 500.0mF,
3000mF
| ****
3.5%*** + 6d
Additional 50.00nF range accuracy is not specified
Accuracies with film capacitor or better
Specified with battery voltage above 2.8V (approximately half full
battery). Accuracy decreases gradually to 12% at low battery warning voltage
of approximately 2.4V
Hz Frequency
**RANGE*** | Accuracy** |
---|
50.00Hz, 500.0Hz,
5.000kHz, 50.00kHz,
500.0kHz, 1.000MHz
| ****
0.5%+4d
Additional 5.000Hz range accuracy & sensitivity are not specified
**Accuracy is specified at < 20VAC rms
Input Signal : Square wave with duty cycle > 40% & < 70%; or Sine
wave Vrms AC
Sensitivity :
10Hz–20Hz : > Sine 0.9Vrms;
20Hz–500kHz : > 2.6Vp; or Sine 1.9Vrms; 500kHz–1MHz : > 4.2Vp; or Sine 3Vrms
Update Rate : 2 per second nominal
LIMITED WARRANTY
METREL warrants to the original product purchaser that each product it manufactures will be free from defects in material and workmanship under normal use and service within a period of three years from the date of purchase. METREL’s warranty does not apply to accessories, fuses, fusible resistors, spark gaps, batteries or any product which, in METREL’s opinion, has been misused, altered, neglected, or damaged by accident or abnormal conditions of operation or handling.
To obtain warranty service, contact your supplier or send the product, with proof of purchase and description of the difficulty, postage and insurance prepaid, to METREL UK, Unit 1, Hopton House, Ripley Drive, Normanton, West Yorkshire, WF6 1QT. METREL assumes no risk for damage in transit. METREL will, at its option, repair or replace the defective product free of charge. However, if METREL determines that the failure was caused by misused, altered, neglected, or damaged by accident or abnormal conditions of operation or handling, you will be billed for the repair. The cost of logistics shall be carried by the owner of the product.
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
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