Greenlee DM-500 Manuale utente
999 3258.0 © 2000 Greenlee Textron IM 1402 REV 1 6/00
INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
MANUEL D’INSTRUCTIONS
Read and understand all of the instructions and safety
information in this manual before operating or servicing this tool.
Lea y entienda todas las instrucciones y la información sobre
seguridad que aparecen en este manual, antes de manejar estas
herramientas o darles mantenimiento.
Lire attentivement et bien comprendre toutes les instructions et
les informations sur la sécurité de ce manuel avant d’utiliser ou de
procéder à l’entretien de cet outil.
DM-500 • DM-510
DIGITAL
MULTIMETERS
MULTÍMETROS
DIGITALES
MULTIMETRES
NUMERIQUES
2
Description
The Greenlee DM-500 and DM-510 Digital Multimeters are hand-held testing devices with the
following measurement capabilities: AC and DC voltage, AC and DC current, temperature
(K-type thermocouples only), frequency, resistance and capacitance. They also check diodes
and verify continuity.
Specialized functions and capabilities include:
• Harmonics function, for detecting the presence of disruptive harmonics
• Industrial Process Control Loop Current function, which allows checking the output from a
standard 4 mA to 20 mA control loop
• Recording function, which stores the maximum, minimum, difference
(maximum–minimum) and average input
• Bar graph display, which responds more quickly than the numeric display — useful for
detecting faulty contacts, potentiometer clicks and signal spikes
• T1-T2 function, for taking two temperature measurements at the same time, which allows
comparing two different temperatures
Safety
Safety is essential in the use and maintenance of Greenlee tools and equipment. This
instruction manual and any markings on the tool provide information for avoiding hazards and
unsafe practices related to the use of this tool. Observe all of the safety information provided.
Purpose
This instruction manual is intended to familiarize all personnel with the safe operation and
maintenance procedures for Greenlee DM-500 and DM-510 Digital Multimeters.
Keep this manual available to all personnel.
Replacement manuals are available upon request at no charge.
and are registered trademarks of Greenlee Textron.
KEEP THIS MANUAL
DM-500 • DM-510
3
Important Safety Information
This symbol is used to call your attention to hazards or unsafe practices which could
result in an injury or property damage. The signal word, defined below, indicates the
severity of the hazard. The message after the signal word provides information for
preventing or avoiding the hazard.
SAFETY ALERT SYMBOL
Immediate hazards which, if not avoided, WILL result in severe injury or death.
Hazards which, if not avoided, COULD result in severe injury or death.
Hazards or unsafe practices which, if not avoided, MAY result in injury or property
damage.
Read and understand this material before operating or servicing
this equipment. Failure to understand how to safely operate this
tool can result in an accident causing serious injury or death.
Electric shock hazard:
Contact with live circuits can result in severe injury or death.
4
Important Safety Information
Electric shock hazard:
• Do not use the unit if it is wet or damaged.
• Use test leads or accessories that are appropriate for the application. See the
category and voltage rating of the test lead or accessory.
• Inspect the test leads or accessory before use. The item(s) must be clean and dry,
and the insulation must be in good condition.
Failure to observe these warnings can result in severe injury or death.
Electric shock hazard:
• Do not apply more than the rated voltage between any two input terminals, or
between any input terminal and earth ground.
• Do not contact the test lead tips or any uninsulated portion of the accessory.
Failure to observe these warnings can result in severe injury or death.
• Do not operate with the case open.
• Before opening the case, remove the test leads from the circuit and shut off the unit.
Failure to observe these warnings can result in severe injury or death.
Electric shock and fire hazard:
• Do not expose this unit to rain or moisture.
• Use this unit for the manufacturer’s intended purpose only, as described in this
manual. Any other use can impair the protection provided by the unit.
Failure to observe these warnings can result in severe injury or death.
DM-500 • DM-510
5
Important Safety Information
Do not change the measurement function while the test leads are connected to a
component or circuit.
Failure to observe this precaution can result in injury and can damage the unit.
• Do not attempt to repair this unit. It contains no user-serviceable parts.
• Do not expose the unit to extremes in temperature or high humidity.
See Specifications.
Failure to observe these precautions can result in injury and can damage the unit.
Unless measuring voltage, current or frequency, shut off and lock out power. Make
sure that all capacitors are discharged. Voltage must not be present.
The fuse is an integral part of the overvoltage protection. When fuse replacement is
necessary, see Specifications for the correct type, size and capacity. Using any other
type of fuse will void the overvoltage protection rating of the unit.
Failure to observe this warning can result in severe injury or death.
Set the selector and connect the test leads so that they correspond to the intended
measurement. Incorrect settings or connections can result in a blown fuse.
Using this unit near equipment that generates electromagnetic interference can result
in unstable or inaccurate readings.
6
Identification
1. Display 4-digit LCD (maximum reading is 9999) and bar graph
2. Hold Press momentarily to hold the present value on the display;
Rec
press and hold to begin recording
3. Rel ∆Press momentarily for Relative Zero function; press and hold to
%4-20mA
activate the Industrial Process Control Loop Current function
4. Selector Selects a function or turns power OFF
5. +Positive input terminal for all measurements
except
current and T2
6. COM Negative, common or ground input terminal for all measurements
except
T2
7. µA mA Positive input terminal for low current measurements and T2
8. Positive input terminal for high current measurements and T2
9. Range Selects automatic or manual ranging;
T1-T2 selects T1, T2 or T1-T2 when measuring temperature
10. Select Press momentarily to select the secondary functions;
press and hold to select amps when measuring current
10
9
8
7
3
2
1
4
5
6
DM-500 • DM-510
7
Display Icons
11. Low Battery
12. k Kilo (103)
13. M Mega (106)
14. ΩOhms
15. Hz Hertz (frequency or
cycles per second)
16. µMicro (10-6)
17. m Milli (10-3)
18. F Farads
19. V Volts
20. A Amps
21. Diode
22. Continuity
23. % Percent
24. ∆Relative Zero function
is enabled.
25. OL Overload (numeric display)
Overload (bar graph display)
26. Bar Graph Element
27. ±Polarity for Bar Graph
28. AVG Recorded value is displayed.
MAX-MIN
29. Record mode is enabled.
30. – Polarity Indicator
31. Auto Power Off is enabled.
The meter will shut itself off after
approximately 17 minutes of
inactivity; this feature is disabled
when using the Record mode.
32. DC measurement is selected.
33. AC measurement is selected.
34. Automatic Ranging is enabled.
35. Hold function is enabled.
26
25
34–35
31–33
30
29
28
27
11
16–20
21–24
12–15
8
Using the Features
Button Press momentarily to: Press and hold Notes:
for 1 second to:
• select AC or DC when select amps when
Select measuring current or measuring current
voltage
• select Celsius or
Fahrenheit when
measuring temperature
• select secondary functions
T1-T2 • change from autoranging change from manual T1-T2: Requires
Range to manual ranging ranging to autoranging K-type temperature
• select ranges when using probe(s), purchased
the manual ranging mode separately.
• select a temperature Range: When using
measuring mode the Recording, Hold
(T1, T2 or T1-T2) or Relative ∆mode,
• select trigger levels when pressing Range will
measuring frequency cause the meter to
exit that mode.
%4-20mA
enter or exit the Relative display current as a A display of 0% to
Rel∆Zero mode. percentage of the standard 100% corresponds to
See Operation for
4 mA to 20 mA range used an input of 4 mA to
instructions on the
in Industrial Process 20 mA.
Relative Zero function.
Control
Rec
select the Hold function, enable the Record function. When using the
Hold which holds the present The meter will begin to Record function,
value on the display. record the input, and will press momentarily to
Press again to return beep whenever the minimum view the maximum,
to normal mode. or maximum is updated. minimum, difference
The Automatic Power Off
(MAX-MIN) and the
feature is disabled when
average. Press and
using this function.
hold to stop
recording.
DM-500 • DM-510
9
AC Measurement
AC measurements are usually displayed as RMS (root mean squared) values. Two methods of
AC measurement are average-responding RMS calibrated and true RMS-reading.
The average-responding RMS calibrated method takes the average value of the input signal,
multiplies it by 1.11, and displays the result. This method is accurate if the input signal is a
pure sine wave. The Greenlee DM-500 is an average-responding meter.
The true RMS-reading method uses internal circuitry to read the true RMS value. This method
is accurate, within the specified crest factor limitations, whether the input signal is a pure sine
wave, a square wave, sawtooth wave, half wave or signal with harmonics. The ability to read
true RMS provides much more measurement versatility. The DM-510 is a true RMS meter.
The Waveforms and Crest Factors table shows some typical AC signals and their RMS values.
Waveforms and Crest Factors
*The crest factor is the ratio of the peak value to the RMS value; it is represented by the
Greek letter ξ.
Waveform
RMS Value
Average Value
Crest Factor*
(ξ)
100 100 100 100
90 100 87 64
1.414 1 1.73 2
10
Harmonics Function (DM-510 only)
Harmonics are unwanted AC voltages or currents at frequencies that are multiples of the
standard frequency. Usually caused by devices with non-linear load (solid state lighting
ballasts, solenoids, etc.), harmonics can cause voltage disturbances in high-impedance
systems. These voltage harmonics will then affect other devices in the same voltage
distribution system. Harmonics can cause:
• transformers, generators and motors to overheat and burn out
• circuit breakers to trip
• fuses to blow
• neutral lines to overheat
• bus bar and circuit breaker panel vibration
The harmonics function provides a cost-effective method of detecting harmonics. The display
will show a percentage (0% to 100%) that indicates the amount of deviation from a standard
sinewave. A reading of 0% indicates a pure sinewave.
Harmonics Table
Input Waveform Description HAR Value
No distortion, pure Sinusoidal, 0%
y = 100sin(ωt)
Fundamental with 10% 3rd harmonics, 4%
y = 100sin(ωt) + 10sin(3ωt+π)
Fundamental with 20% 3rd harmonics, 8%
y = 100sin(ωt) + 20sin(3ωt+π)
Fundamental with 30% 3rd harmonics, 13%
y = 100sin(ωt) + 30sin(3ωt+π)
Fundamental with 40% 3rd harmonics, 17%
y = 100sin(ωt) + 40sin(3ωt+π)
Fundamental with 50% 3rd harmonics, 19%
y = 100sin(ωt) + 50sin(3ωt+π)
Questo manuale è adatto per i seguenti modelli
1
Indice
Lingue:
Altri manuali Greenlee Multimetro
Greenlee
Greenlee DM-60 Manuale utente
Greenlee
Greenlee CM-900 Manuale utente
Greenlee
Greenlee CMI-100 Manuale utente
Greenlee
Greenlee CM-400 Manuale utente
Greenlee
Greenlee CM-410 Manuale utente
Greenlee
Greenlee 93-606 Manuale utente
Greenlee
Greenlee DM-820A Manuale utente
Greenlee
Greenlee CMT-80 Manuale utente
Greenlee
Greenlee DM-45 Manuale utente
Greenlee
Greenlee 93-502 Manuale utente
Greenlee
Greenlee CMP-200 Manuale utente
Greenlee
Greenlee DML-430 Manuale utente
Greenlee
Greenlee DM-200 Manuale utente
Greenlee
Greenlee CMI-200 Manuale utente
Greenlee
Greenlee DM-20 Manuale utente
Greenlee
Greenlee DM-810A Manuale utente
Greenlee
Greenlee DM-70 Manuale utente
Greenlee
Greenlee PDMM-20 Manuale utente
Greenlee
Greenlee DM-60 A Manuale utente
Greenlee
Greenlee CM-750 Manuale utente
Manuali Multimetro popolari di altre marche
Gossen MetraWatt
Gossen MetraWatt METRAmax 6 Manuale utente
PeakTech
PeakTech 4000 Manuale per l'uso e la cura
YOKOGAWA
YOKOGAWA 90050B Manuale utente
Gossen MetraWatt
Gossen MetraWatt METRALINE DMM16 Manuale utente
Fluke
Fluke 8846A Manuale operativo e di manutenzione
Tempo Communications
Tempo Communications MM200 Manuale utente
