Circuit-test DMR-6700 User manual

USER'S MANUAL
Multimeter
True RMS
DMR-6700
CIRCUIT-TEST ELECTRONICS
www.circuittest.com

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Introduction
Safety
This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance,
Frequency (electrical & electronic), Diode Test, and Continuity plus Thermo-
couple Temperature. It features a waterproof, rugged design for heavy duty use.
Proper use and care of this meter will provide many years of reliable service.
This symbol adjacent to another symbol, terminal or operating
device indicates that the operator must refer to an explana-
tion in the Operating Instructions to avoid personal injury or
damage to the meter.
This WARNING symbol indicates a potentially hazardous
situation, which if not avoided, could result in death or serious
injury.
This CAUTION symbol indicates a potentially hazardous situ-
ation, which if not avoided, may result damage to the product.
This symbol advises the user that the terminal(s) so marked
must not be connected to a circuit point at which the voltage
with respect to earth ground exceeds (in this case) 1000 VAC
or VDC
This symbol adjacent to one or more terminals identies them
as being associated with ranges that may, be subjected to
particularly hazardous voltages. For maximum safety, the meter
and test leads should not be handled when these terminals
are energized.
Double Insulation.

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PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY
OVERVOLTAGE CATEGORY I
Equipment of OVERVOLTAGE CATEGORY I is equipment for connection
to circuits in which measures are taken to limit the transient overvoltages
to an appropriate low level.
Note – Examples include protected electronic circuits.
OVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equip-
ment to be supplied from the xed installation.
Note – Examples include household, ofce, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in xed
installations.
Note – Examples include switches in the xed installation and some equipment
for industrial use with permanent connection to the xed installation.
OVERVOLTAGE CATEGORY IV
Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of
the installation.
Note – Examples include electricity meters and primary over-current protec-
tion equipment

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SAFETY INFORMATION
Caution and proper guidelines must be followed for personal and product safety.
Read this instruction manual carefully and completely before using the meter.
Lack of caution or poor safety practices can result in serious injury or death.
• Always start with power off. Set the function switch to the correct setting
before making any measurements and do not change position of the func-
tion switch during measurements.
• Do not use the meter if the meter or test leads look damaged or if there is
doubt that the meter is not operating properly.
• When using the test probes always keep ngers behind the nger guards.
Never touch the exposed probe tip.
• Always consider circuits to be energized. Never assume any equipment
to be de-energized.
• Use caution when working above 35VDC or 25VAC RMS as these volt-
ages pose a shock hazard.
• Never connect unit to AC or DC powered circuits when the function switch
is set to resistance, diode check or continuity ranges.
• Always disconnect the power when performing resistance, or diode tests.
• Always turn off the power to the circuit under test before unsoldering or
breaking the circuits. Small amount of current can be dangerous.
• Disconnect test leads before removing the batteries or the fuse.
• Do not operate the unit unless the case is completely closed.

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SAFETY INSTRUCTIONS
This meter has been designed for safe use, but must be operated with caution.
The rules listed below must be carefully followed for safe operation.
1. NEVER apply voltage or current to the meter that exceeds the specied
maximum:
Input Limits
Function Maximum Input
V DC or V AC 1000VDC/AC rms
mA AC/DC 400mA AC/DC
A AC/DC 10A AC/DC (20A for 30 seconds
maximum every 15 minutes)
Frequency, Resistance, Capacitance,
Diode Test, Continuity 600VDC/AC RMS
2. USE EXTREME CAUTION when working with high voltages.
3. DO NOT measure voltage if the voltage on the "COM" input jack ex-
ceeds 600V above earth ground.
4. NEVER connect the meter leads across a voltage source while the
function switch is in the current, resistance, or diode mode. Doing so
can damage the meter.
5. ALWAYS discharge lter capacitors in power supplies and disconnect
the power when making resistance or diode tests.
6. ALWAYS turn off the power and disconnect the test leads before open-
ing the covers to replace the fuse or batteries.
7. NEVER operate the meter unless the back cover and the battery and
fuse covers are in place and fastened securely.
8. If the equipment is used in a manner not specied by the manufacturer,
the protection provided by the equipment may be impaired.

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Controls and Jacks
1. 4,000 count LCD display
2. RANGE button
3. Hz and % button
4. Mode button
5. Data Hold button
6. RELATIVE button
7. Backlight button
8. Function switch
9. 10A input jack
10. μA, mA input jack
11. Positive input jack
12. COM input jack
Note: Tilt stand and battery compartment are on rear of unit.
AUTO Autoranging
HOLD Display hold
REL Relative
Diode test
Continuity
ºC Degree Celsius
ºF Degree Fahrenheit
DC Direct current
AC Alternating current
Battery status
n nano (10-9) (capacitance)
μ micro (10-6) (amps, cap)
m milli (10-3) (volts, amps)
A Amps
V Volts
k kilo (103) (ohms)
F Farads (capacitance)
Symbols and Annunciators
M mega (106) (ohms)
Ω Ohms
Hz Hertz (frequency)
% Percent (duty ratio)

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Specications
Enclosure Double molded, waterproof
Shock (Drop Test) 6.5 feet (2 meters)
Diode Test Test current of 0.3mA maximum, open circuit
voltage 1.5V DC typical
Continuity Check Audible signal will sound if the resistance is less
than 100Ω (approx.), test current <0.3mA
Temperature Sensor Requires type K thermocouple
Input Impedance 7.8MΩ
AC Response True RMS
ACV Bandwidth 40Hz to 400Hz
Crest Factor ≤3 at full scale up to 500V, decreasing linearly to
≤1.5 at 1000V
Display 4,000 count LCD with backlit
Over range indication “OL” is displayed
Auto Power Off 30 minutes (approximately) with disable feature
Polarity Automatic (no indication for positive); Minus (-)
sign for negative
Measurement Rate 2 times per second, nominal
Low Battery Indication “ ” is displayed if battery voltage drops below
operating voltage
Battery One 9 volt (NEDA 1604) battery
Fuses mA, μA ranges; 0.5A/1000V ceramic fast blow,
6.32 x 32mm A range; 10A/1000V ceramic fast
blow, 10 x 38mm
Operating Temperature 41°F to 104°F (5°C to 40°C)
Storage Temperature -4°F to 140°F (-20°C to 60°C)
Operating Humidity Max 80% up to 87°F (31°C) decreasing linearly
to 50% at 104°F (40°C)
Storage Humidity <80%
Operating Altitude 7000ft. (2000meters) maximum.

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Weight 0.753lb (342g) (includes holster).
Size 7.36” x 3.2” x 2.0” (187 x 81 x 50mm) (includes
holster)
Safety / Approvals This meter is UL and CUL approved and con-
forms to IEC61010-1 for Overvoltage Category
CAT IV 600V and CAT III 1000V
Function Range Resolution Accuracy
DC Voltage
400mV 0.1mV ±(0.5% reading + 2 digits)
4V 0.001V
±(1.2% reading + 2 digits)40V 0.01V
400V 0.1V
1000V 1V ±(1.5% reading + 10 digits)
AC Voltage
400mV 0.1mV ±(2.0% reading + 10 digits)
4V 0.001V
±(2.0% reading + 5 digits)40V 0.01V
400V 0.1V
1000V 1V ±(2.5% reading + 5 digits)
DC Current
400uA 0.1uA ±(1.0% reading + 3 digits)
4000uA 1uA
±(1.5% reading + 3 digits)40mA 0.01mA
400mA 0.1mA
10A 0.01A ±(2.5% reading + 5 digits)
AC Current
400uA 0.1uA ± (2.5% reading + 10 digits)
4000uA 1uA
±(2.5% reading + 5 digits)40mA 0.01mA
400mA 0.1mA
10A 0.01A ±(3.0% reading + 7 digits)
Note: Accuracy is stated at 65ºF to 83ºF (18ºC to 28ºC) and less than 75% RH.

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Function Range Resolution Accuracy
Resistance
400Ω 0.1Ω ±(1.2% reading + 4 digits)
4kΩ 0.00k1Ω ±(1.0% reading + 2 digits)
40kΩ 0.01kΩ
±(1.2% reading + 2 digits)400kΩ 0.1kΩ
4MΩ 0.001MΩ
40MΩ 0.01MkΩ ±(2.0% reading + 3 digits)
Capacitance
4nF 0.001nF ±(5.0% reading +0.5nF)
40nF 0.01nF ±(5.0% reading + 7 digits)
400nF 0.1nF
±(3.0% reading + 5 digits)4uF 0.001uF
40uF 0.01uF
100uF 0.1uF ±(5.0% reading + 5 digits)
Frequency
5.999Hz 0.001Hz ±(1.5% reading + 1 digit)
59.99Hz 0.01Hz
599.9Hz 0.1Hz
±(1.2% reading + 3 digits)
5.999kHz 0.001kHz
59.99kHz 0.01kHz
599.9kHz 0.1kHz
5.999MHz 0.001MHz ±(1.5% reading + 4 digits)
9.999mHz 0.001MHz
Sensitivity: 0.5Vrms <500kHz; 3Vrms >500kHz
Duty Cycle 0.1%~99.9% 0.1% ±(1.2% reading + 2 digits)
Pulse width: 100us to 100ms, Frequency: 5Hz to 150kHz
Temperature -20°to 750°C 1°C ±(3% reading + 5°C/9°F)
-4°to 1382 °F 1°F
Note: Accuracy specications consist of two elements:
• (% reading) – This is the accuracy of the measurement circuit.
• (+ digits) – This is the accuracy of the analog to digital converter.

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Operating Instructions
WARNING: Risk of electrocution. High-voltage circuits, both AC and DC,
are very dangerous and should be measured with great care.
DC Voltage Measurements
CAUTION: Do not measure DC voltages if a motor on the circuit is being
switched ON or OFF. Large voltage surges may occur that can damage
the meter.
1. Set the function switch to the position.
2. Press MODE (if required) so DC appears on the
display.
3. Insert the black test lead banana plug into the nega-
tive COM jack. Insert the red test lead banana plug
into the positive V jack.
4. Touch the black test probe tip to the negative side of
the circuit. Touch the red test probe tip to the positive
side of the circuit.
5. Read the voltage in the display.
1. ALWAYS turn the function switch to OFF position when the meter is not
in use.
2. If “OL” appears in the display during a measurement, the value exceeds
the range you have selected. Change to a higher range.

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AC Voltage (Frequency, Duty Cycle) Measurements
WARNING: Risk of Electrocution. The probe tips may not be long enough
to contact the live parts inside some 240V outlets for appliances because
the contacts are recessed deep in the outlets. As a result, the reading may
show 0 volts when the outlet actually has voltage on it. Make sure the probe
tips are touching the metal contacts inside the outlet before assuming that
no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the circuit is being
switched ON or OFF. Large voltage surges may occur that can damage
the meter.
1. Set the function switch to the position.
2. Press MODE (if required) so AC appears on the display.
3. Insert the black test lead banana plug into the nega-
tive COM jack. Insert red test lead banana plug into
the positive V jack.
4. Touch the black test probe tip to the neutral side of the
circuit. Touch the red test probe tip to the “hot” side of
the circuit.
5. Read the voltage in the display.
6. Press the HZ/% button to indicate “Hz”.
7. Read the frequency in the display.
8. Press the Hz/% button again to indicate “%”.
9. Read the % of duty cycle in the display.

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1. Insert the black test lead banana plug into the negative COM jack.
2. For current measurements up to 4000μA DC, set the function switch to
the yellow μ position and insert the red test lead banana plug into the
μA/mA jack.
3. For current measurements up to 400mA DC, set the
function switch to the yellow m position and insert the
red test lead banana plug into the μA/mA jack.
4. For current measurements up to 10A DC, set the func-
tion switch to the yellow 10 /HZ position and insert the
red test lead banana plug into the 10A jack.
5. Press the MODE button to indicate “DC” on the display.
6. Remove power from the circuit under test, then open up
the circuit at the point where you wish to measure cur-
rent.
7. Touch the black test probe tip to the negative side of the circuit. Touch
the red test probe tip to the positive side of the circuit.
8. Apply power to the circuit.
9. Read the current in the display.
DC Current Measurements
CAUTION: Do not make current measurements on the 20A scale for longer
than 30 seconds. Exceeding 30 seconds may cause damage to the meter
and/or the test leads.

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AC Current (Frequency, Duty Cycle) Measurements
CAUTION: Do not make current measurements on the 20A scale for longer
than 30 seconds. Exceeding 30 seconds may cause damage to the meter
and/or the test leads.
1. Insert the black test lead banana plug into the negative COM jack.
2. For current measurements up to 4000μA AC, set the function switch to
the yellow μ position and insert the red test lead banana plug into the
μA/mA jack.
3. For current measurements up to 400mA AC, set the
function switch to the yellow m position and insert
the red test lead banana plug into the μA/mA jack.
4. For current measurements up to 10A AC, set the
function switch to the yellow 10 /HZ position and
insert the red test lead banana plug into the 10A jack.
5. Press the MODE button to indicate “AC” on the
display.
6. Remove power from the circuit under test, then open
up the circuit at the point where you wish to measure
current.
7. Touch the black test probe tip to the neutral side of the circuit. Touch the
red test probe tip to the “hot” side of the circuit.
8. Apply power to the circuit.
9. Read the current in the display.
10. Press the Hz/% button to indicate “Hz”.
11. Read the frequency in the display.
12. Press the Hz/% button again to indicate “%”.
13. Read the % duty cycle in the display.
14. Press the Hz/% button to return to current measurement.

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Continuity Check
WARNING: To avoid electric shock, never measure continuity on circuits
or wires that have voltage on them.
Resistance Measurements
WARNING: To avoid electric shock, disconnect power to the unit under test
and discharge all capacitors before taking any resistance measurements.
Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative
COM jack. Insert the red test lead banana plug into the
positive Ω jack.
3. Press the MODE button to indicate “Ω" on the display.
4. Touch the test probe tips across the circuit or part under
test. It is best to disconnect one side of the part under
test so the rest of the circuit will not interfere with the
resistance reading.
5. Read the resistance in the display.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative
COM jack. Insert the red test lead banana plug into the
positive Ω jack.
3. Press the MODE button to indicate " " and "Ω" on
the display.
4. Touch the test probe tips to the circuit or wire you wish
to check.
5. If the resistance is less than approximately 100Ω, the
audible signal will sound. If the circuit is open, the display will indicate
“OL”.

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NOTE: The temperature probe is tted with a type K mini connector. A mini
connector to banana connector adaptor is supplied for connection to the input
banana jacks.
Temperature Measurements
1. Set the function switch to ºC or ºF position.
2. Insert the Temperature Probe into the input
jacks, making sure to observe the correct
polarity.
3. Touch the Temperature Probe head to the
part whose temperature you wish to measure.
Keep the probe touching the part under test
until the reading stabilizes (about 30 seconds).
4. Read the temperature in the display.
Diode Test
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive V jack.
3. Press the MODE button to indicate and V on the
display.
4. Touch the test probes to the diode under test. Forward
voltage will typically indicate 0.400 to 0.700V. Reverse
voltage will indicate “OL”. Shorted devices will indicate
near 0V and an open device will indicate “OL” in both
polarities.

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Capacitance Measurements
WARNING: To avoid electric shock, disconnect power to the unit under test
and discharge all capacitors before taking any capacitance measurements.
Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω position.
2. Insert the black test lead banana plug into the
negative COM jack. Insert the red test lead banana
plug into the positive V jack.
3. Press the MODE button to indicate “nF” on the
display.
4. Touch the test leads to the capacitor to be tested.
5. The test may take up to 3 minutes or more for large
capacitors to charge. Wait until the readings settle
before ending the test.
6. Read the capacitance value in the display.
1. Set the function switch to the “Hz %” position.
2. Press the Hz/% button to indicate “Hz” in the display.
3. Insert the black lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive Hz jack.
4. Touch the test probe tips to the circuit under test.
5. Read the frequency on the display.
6. Press the Hz/% button again to indicate “%” on the
display.
7. Read the % of duty cycle on the display.
Frequency / Duty Cycle Measurements (Electronic)

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Autoranging/Manual Range Selection
1. Press the RANGE key. The “AUTO” display indicator will turn off.
2. Press the RANGE key to step through the available ranges until you
select the range you want.
3. To exit Manual Ranging, press and hold RANGE key for 2 seconds.
When the meter is rst turned on, it automatically goes into Autoranging. This
automatically selects the best range for the measurements being made and is
generally the best mode for most measurements. For measurement situations
requiring that a range be manually selected, perform the following:
NOTE: Manual ranging does not apply for Capacitance and Frequency functions.
RELATIVE MODE
1. Perform the measurement as described in the operating instructions.
2. Press the REL button to store the reading in the display and the "REL"
indicator will appear on the display.
3. The display will now indicate the difference between the stored value
and the measured value.
4. Press the REL button to exit the relative mode.
The relative measurement feature allows you to make measurements relative
to a stored reference value. A reference voltage, current, etc. can be stored
and measurements made in comparison to that value. The displayed value is
the difference between the reference value and the measured value.
NOTE: The Relative function does not operate in the Frequency function.
DISPLAY BACKLIGHT
Press the to turn on the display backlight function. The backlight will au-
tomatically turn off after 10-15 seconds.

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HOLD
The hold function freezes the reading in the display. Press the HOLD key
momentarily to activate or to exit the HOLD function.
MODE
To select Resistance, Diode, Continuity, Capacitance or AC and DC Volts
and Current.
AUTO POWER OFF
The auto off feature will turn the meter off after approximate 30 minutes of
inactivity. To disable the auto power off feature, hold down the MODE button
and turn the meter on.
LOW BATTERY INDICATION
The icon will be indicated in the display when the battery voltage becomes
low. Replace the battery when this appears.

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Battery Installation
1. KEEP THE METER DRY. If it gets wet, wipe it off.
2. USE AND STORE THE METER IN NORMAL TEMPERATURES. Tem-
perature extremes can shorten the life of the electronic parts and distort
or melt plastic parts.
3. HANDLE THE METER GENTLY AND CAREFULLY. Dropping it can
damage the electronic parts or the case.
4. KEEP THE METER CLEAN. Wipe the case occasionally with a damp
cloth. DO NOT use chemicals, cleaning solvents, or detergents.
5. USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND
TYPE. Remove old or weak batteries so they do not leak and damage
the unit.
6. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME,
the batteries should be removed to prevent damage to the unit.
Maintenance
WARNING: To avoid electric shock, disconnect the test leads from any source
of voltage before removing the back cover or the battery or fuse covers.
WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the battery cover.
WARNING: To avoid electric shock, do not operate your meter until the
battery and fuse covers are in place and fastened securely.
This multimeter is designed to provide years of dependable service, if the
following care instructions are performed:
1. Turn power off and disconnect the test leads from the meter.
2. Open the rear battery cover by removing two screws (B) using a Phillips
head screwdriver.
3. Insert the battery into battery holder, observing the correct polarity.
4. Put the battery cover back in place. Secure with the screws.

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WARNING: To avoid electric shock, do not operate the meter until the bat-
tery cover is in place and fastened securely.
Replacing the Fuses
WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the fuse cover.
1. Disconnect the test leads from the meter.
2. Remove the protective rubber holster.
3. Remove the battery cover (two “B” screws) and the battery.
4. Remove the six “A” screws securing the rear cover.
5. Gently remove the old fuse and install the new fuse into the holder.
6. Always use a fuse of the proper size and value (0.5A/1000V fast blow
for the 400mA range, 10A/1000V fast blow for the 10A range.
7. Replace and secure the rear cover, battery and battery cover.
WARNING: To avoid electric shock, do not operate your meter until the fuse
door is in place and fastened securely.
NOTE: If your meter does not work properly, check the fuses and batteries to
make sure that they are still good and that they are properly inserted.