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General DMM550, Руководство пользователя

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INTRODUCTION

Thank you for purchasing General Tools & Instruments’
(General’s) DMM550 Rugged True RMS Multimeter with
NCV Detection. Please read this user’s manual carefully
and thoroughly before using the instrument.
The DMM550 is designed for use in an industrial setting
by HVAC/R contractors, building maintenance
technicians, MRO (maintenance, repair and operations)
personnel at process and power plants, electricians and
electrical/electronic technicians.

KEY FEATURES

• 18 functions, 48 ranges
• Measures AC/DC voltage, AC/DC current, resistance,

capacitance, frequency and duty cycle

• Also measures temperature from -58° to 1112°F 

(-50° to 600°C) with included “K” type stem
thermocouple probe

• Checks continuity and diode integrity
• True RMS measurements
• IP54 water/oil/dust protection
• 6 ft. (1.8m) drop-resistant
• Designed to meet CAT III 1000V, CAT IV 600V safety

standard

• Auto or manual ranging
• Non-contact voltage (NCV) detection
• Backlit 3-1/2 digit (4,000 count) dual readout LCD
• 40-segment analog bar graph at bottom of LCD
• Hold, Max, Min, Rel (Zero) display options
• 15-minute Auto Power Off (can be disabled)
• 3 year limited warranty

3

DMM550_Manual_RR1_FINAL_070914_awb  7/9/14  1:54 PM  Page 3

Содержание DMM550

Страница 1: ...RUGGED TRUE RMS MULTIMETER WITH NCV DETECTION USER S MANUAL DMM550 Please read this manual carefully and thoroughly before using this product ...

Страница 2: ...Measurements 10 11 Disabling Auto Power Off APO 11 Using the Analog Bar Graph 11 Turning on the Backlight 12 Measuring AC or DC Current 12 13 Measuring AC or DC Voltage 13 15 Using the Non contact Voltage Detector 14 15 Measuring Resistance 15 Checking for Continuity 16 Checking the Integrity of a Diode 16 Measuring Capacitance 17 Measuring Frequency and Duty Cycle 17 Measuring Temperature 18 19 S...

Страница 3: ...EY FEATURES 18 functions 48 ranges Measures AC DC voltage AC DC current resistance capacitance frequency and duty cycle Also measures temperature from 58 to 1112 F 50 to 600 C with included K type stem thermocouple probe Checks continuity and diode integrity True RMS measurements IP54 water oil dust protection 6 ft 1 8m drop resistant Designed to meet CAT III 1000V CAT IV 600V safety standard Auto...

Страница 4: ...and physical structures of the DMM550 Fig 2 shows all possible indications on the LCD Familiarize yourself with the functions and meanings of these controls indicators and connectors before moving on to the Setup Instructions and Operating Instructions Fig 1 The controls indicators and physical structures of the DMM550 햲 Non contact voltage NCV visual indication red LED 햳 LCD 햴 Function buttons RE...

Страница 5: ...ltage see p 13 or current see p 12 2 With the rotary function switch in the Temp position selects F or C unit see p 18 3 With the rotary function switch in the position selects resistance measurement continuity checking or diode integrity verification see pp 15 16 Turns the backlight on and off NCV Activates the non contact voltage sensor see p 14 햵 Rotary function switch 햶 Input jacks uA mA jack ...

Страница 6: ... operation by measuring a known voltage Do not use the meter if it operates abnormally Protection may be impaired When in doubt have the meter serviced WARNING Do not apply more than the rated voltage as marked on the meter between the and COM jacks or between any jack and ground Also do not input more than the rated current as marked on the meter through the 10A or uA mA jack WARNING Do not measu...

Страница 7: ...manual ranging mode to avoid the risk of shock due to possible improper reading verify the presence of any AC voltages by first using the AC function Then select a DC voltage range equal to or greater than the AC range Before measuring current turn off power to the circuit before connecting the meter Do not operate the meter with the case or part of the case removed Use only 1 9V battery properly ...

Страница 8: ...C or DC Ω Resistance Capacitance Application and removal from hazardous live conductors permitted For measurements made on building equipment such as distribution panels feeders and short branch circuits and on lighting systems in large buildings 8 Auto Power Off function enabled CAT IV For measurements on circuits connected directly to the source of power for a given building for example on the c...

Страница 9: ...tions that can be applied to measurements and displays of multiple parameters Ranging Options By default the meter automatically enters Auto Ranging mode when powered on In this mode the meter chooses the measurement range that maximizes the resolution of its current voltage resistance capacitance and frequency measurements The term indicates operation in Auto Ranging mode To switch to Manual Rang...

Страница 10: ...nimum Readings Pressing the MAX MIN button once switches the secondary readout to show the largest value of the parameter being measured since entering that measurement mode The primary display and the analog bar graph at the bottom of the LCD will continue to show real time readings Pressing the MAX MIN button a second time switches the secondary readout to show the smallest value of the paramete...

Страница 11: ...the APO function has activated and powered the meter off you can wake the meter up simply by turning the rotary function switch to a different position The icon on the left side of the LCD indicates that the APO function is enabled To disable the APO function you must power on the meter in a special way by pressing and holding the REL button while turning the rotary function switch to any position...

Страница 12: ...re unsure what amplitude to expect select the position 2 Press the FUNC button to select either AC or DC current as indicated by the or display icon on the left side of the LCD 3 Before measuring DC currents press the REL button to reset the DC current measurement baseline to 0A 4 Plug the black test lead into the black COM jack at the bottom right of the front panel 5 Plug the red test lead into ...

Страница 13: ...asure voltage higher than 600V Doing so may damage the meter s internal circuitry If the voltage is over 1000V the beeper will sound continuously indicating an over range measurement 1 Turn the rotary function switch to the position By default when the switch is initially set to this position the meter is configured to measure DC voltage as indicated by the display icon on the left side of the LCD...

Страница 14: ... DC voltages such as those present in automotive electrical systems In addition the DMM550 typically cannot detect 120VAC from a distance of more than 0 25 in 6 2mm and never through a wall or metal conduit Warning The NCV detector in the DMM550 is designed to indicate the presence of AC voltage with an amplitude of 110VACRMS or greater However do not assume that the absence of a positive indicati...

Страница 15: ... position By default when the switch is initially set to this position with the test leads not plugged in the meter will automatically 1 enter resistance measurement indicated by the term MΩ at the lower right of the LCD and Auto Ranging modes and 2 display O L indicating an open circuit on the primary readout 2 Plug the black test lead into the front panel COM jack and the red test lead into the ...

Страница 16: ...ry readout CHECKING THE INTEGRITY OF A DIODE 1 Turn the rotary function switch to the position Press the FUNC button twice to select the diode check function Until the test leads are plugged in the primary readout will show OL with the icon of a diode above it 2 Plug the black test lead into the front panel COM jack and the red test lead into the jack 3 Connect the red test lead to the anode posit...

Страница 17: ...AND DUTY CYCLE As described earlier the DMM550 automatically measures the frequency of measured AC currents and voltages and displays them on the secondary readout However the range of frequencies that can be measured and displayed in this way is limited to 10Hz to 1kHz Using the Hz position of the rotary function switch expands the range of measurable frequencies to 10Hz to 40MHz while providing ...

Страница 18: ...es Measurement accuracy Frequency with rotary function Measurement ranges switch in Hz position Measurement accuracy Overload protection MEASURING TEMPERATURE To measure the temperature of a solid liquid or gas 1 Turn the rotary function switch to the Temp position The primary readout will show spurious readings until a thermocouple probe is plugged into the meter s front panel jacks 2 Plug the in...

Страница 19: ...es 600mA 1000V fuse with rotary function switch in in or position 10A 1000V fuse with rotary function switch in position 0 to 400Ω 4kΩ 40kΩ 400kΩ 4MΩ 40MΩ 1 5 of reading 5 digits in 40MΩ range 0 8 of reading 5 digits in other ranges 10Hz to 40Hz 400Hz 4kHz 40kHz 400kHz 4MHz 40MHz for 3V peak to peak AC inputs 1 5 of reading 5 digits 250VDC VACRMS 19 3 Plug the included K type thermocouple or a dif...

Страница 20: ...tion level in resistance frequency continuity diode integrity and capacitance modes Input impedance Sampling time Safety rating Water dust oil protection level Display No of digits Maximum count Auto power off trigger Operating temperature Storage temperature Maximum altitude Power source Dimensions Weight including battery 20 Note Accuracy values are stated for an operating temperature between 64...

Страница 21: ...r analog bar graph in all modes except AC and DC current 1sec for LCD and 400msec for analog bar graph CAT III 1000V CAT IV 600V IP54 3 1 2 4000 15 minutes of front panel inactivity 32 to 104 F 0 to 40 C 14 to 122 F 10 to 50 C 6562 ft 2000m 1 9V battery 6 9 x 3 3 x 2 1 in 175 x 85 x 52mm 14 8 oz 420g 3 165 3 3 x 5 5 x 1 for operation at 63 F and 83 F one degree outside the range 3 33 3 3 x 5 5 x 2...

Страница 22: ...r WARRANTY INFORMATION General Tools Instruments General s DMM550 Rugged True RMS Multimeter with NCV Detection is warranted to the original purchaser to be free from defects in material and workmanship for a period of three years Subject to certain restrictions General will repair or replace this instrument if after examination the company determines it to be defective in material or workmanship ...

Страница 23: ...now at www generaltools com ProductRegistry to receive a 60 day extension to your warranty RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality However in the event your instrument requires repair please contact our Customer Service to obtain an RGA Return Goods Authorization number before forwarding the unit via prepaid freight to the atte...

Страница 24: ...1 6499 TOLL FREE 800 697 8665 e mail sales generaltools com www generaltools com DMM550 User s Manual Specifications subject to change without notice 2014 GENERAL TOOLS INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN DMM550 7 9 14 General Tools Instruments GeneralToolsNYC ...

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