CEM DT-9969 User manual

Please read this manual before switching the unit on.
Important safety information inside.
True RMS IndustrialTrue RMS Industrial
MultimeterMultimeter

True RMS Industrial Multimeter User's Guide
True RMS Industrial Multimeter User's Guide

True RMS Industrial Multimeter User's GuideTrue RMS Industrial Multimeter User's Guide
True RMS Industrial Multimeter User's Guide
True RMS Industrial Multimeter User's Guide
Contents
1.Introduction
2.Safety
2-1 Per IEC1010 Overvoltage Installation Category
2-2 Cautions
2-3 safety Instructions
3.Controls and Jacks
4.Symbols and Enunciators
5.Operating Instructions
5-1 AC/DC Voltage Measurements
5-2 DC/AC Millivolt Measurements
5-3 AC/DC Current Measurements
5-4 Resistance Measurements
5-5 Continuity Check
5-6 Thermocouple Temperature Measurements
5-7 Capacitance Measurements
5-8 Frequency(DUTY CYCLE)Measurements
5-9 Autoranging/manual range selection
6.Maintenance
6-1 Battery Installation
6-2 Replacing The Fuses
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1.Introduction
2.Safety
Congratulations on your purchase the True RMS Autoranging
Multimeter. This meter measures AC/DC Voltage,AC/DC
Current, Resistance,Capacitance, Frequency,Duty Cycle,Diode
Test,and Continuity plus Thermocouple 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 explanation in the Operating Instructions to avoid
personal injury or damage to the meter.
This symbol indicates a potentially
hazardous situation,which if not avoided,could
result in death or serious injury.
This symbol indicates a potentially
hazardous situation, 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 identifies
them as being associated with ranges that may, in
normal use, be subjected to particularly hazardous
voltages. For maximum safety, the meter and its test
leads should not be handled when these terminals are
energized.
This symbol indicates that a device is protected
throughout by double insulation or reinforced insulation.
WARNING
CAUTION
WARNING
CAUTION
MAX

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5
2-1 Per IEC1010 Overvoltage Installation Category
Overvoltage Category I
Overvoltage CategorY II
Overvoltage Category III
Overvoltage Category IV
2-2 Cautions
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.
Equipment of OVERVOLTAGE CATEGORY II is energy-
consuming equipment to be supplied from the fixed installation.
Note – Examples include household, office, and laboratory
appliances.
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.
Equipment of OVERVOLTAGE CATEGORY IV is for use at
the origin of the installation.
Note – Examples include electricity meters and primary
over-current protection equipment
Improper use of this meter can cause damage,shock,injury
or death.Read and understand this user manual before
operating the meter.
Always remove the test leads before replacing the battery
or fuses.
Inspect the condition of the test leads and the meter itself
for any damage before operating the meter.
•
•
•

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Use great care when making measurements if the voltages
are greater than 25 VAC rms or 35 VDC. These voltages are
considered a shock hazard.
Warning! This is a class A equipment.This equipment can
cause interferences in the living quarters:in this case the
operator can be required to carry out adequate measures.
Always discharge capacitors and remove power from the
device under test before performing Diode,Resistance or
Continuity tests.
Voltage checks on electrical outlets can be difficult and
misleading because of the uncertainty of connection to the
recessed electrical contacts. Other means should be used
to ensure that the terminals are not "live".
If the equipment is used in a manner not specified by the
manufacturer,the protection provided by the equipment may
be impaired.
This device is not a toy and must not reach children's hands.
It contains hazardous objects as well as small parts that the
children could swallow.In case a child swallows any of them,
please contact a physician immediately.
Do not leave batteries and packing material lying around
unattended; they can be dangerous for children if they use
them as toys.
In case the device is going to be unused for an extended
period of time,remove the batteries to prevent them from
draining.
Expired or damaged batteries can cause cauterization on
contact with the skin.Always,therefore,use suitable hand
gloves in such cases.
See that the batteries are not short-circuited.Do not throw
batteries into the fire.
•
•
•
•
•
•
•
•
•
•

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2-3 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.
NEVER apply voltage or current to the meter that exceeds
the specified maximum:
USE EXTREME CAUTION when working with high voltages.
DO NOT measure voltage if the voltage on the "COM" input
jack exceeds 600V above earth ground.
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.
ALWAYS discharge filter capacitors in power supplies and
disconnect the power when making resistance or diode tests.
ALWAYS turn off the power and disconnect the test leads
before opening the covers to replace the fuse or batteries.
NEVER operate the meter unless the back cover and the
battery and fuse covers are in place and fastened securely.
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment
may be impaired.
•
•
•
•
•
•
•
•
Function
VDCorVAC
mA AC/DC
A AC/DC
Frequency, Resistance,
Capacitance,Duty Cycle,
Diode Test, Continuity
Temperature
Maximum Input
1000 VDC/AC rms
500 mA 1000V fast acting fuse
10A 1000V fast acting fuse
(20A for 30 seconds max every
15 minutes)
1000 VDC/AC rms
1000 VDC/AC rms
Input Protection Limits

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3.Controls and Jacks
1.50,000 count LCD
2.MAX/MIN button
3.RANGE button
4.MODE button
5.Function switch
6.mA, μA and 10A input jacks
7.Bluetooth LED indicator
8.RELATIVE and Bluetooth Power button
9.PEAK button
10.HOLD and (Backlight) button
11.Positive input jack
12.COM input jack
Note: Tilt stand and battery compartment are on rear of unit.
True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
1
3
2
4
5
6
11
12
7
10
8
9
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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4.Symbols and Enunciators
APO
PEAK
V
REL
AUT
HOLD
ºC
Min
Continuity
Diode test
Low Battery
n nano (10 ) (capacitance)
μ micro (10 ) (amps, cap)
m milli (10 ) (volts, amps)
A Amps
k kilo (10 ) (ohms)
F Farads (capacitance)
M mega (10 ) (ohms)
Ohms
Hz Hertz (frequency)
% Percent (duty ratio)
AC Alternating current
DC Direct current
ºF Degrees Fahrenheit
MAX Maximum
-9
-6
-3
3
6
Auto Power Off
Peak
Relative
Autoranging
Display hold
Degrees Centigrade
Mum
Volts
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MKΩ
%ºFºC
μ
μ

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5.Operating Instructions
Risk of electrocution.High-voltage circuits,both
AC and DC,are very dangerous and should be measured with
great care.
ALWAYS turn the function switch to the OFF position when
the meter is not in use.
If "OL" appears in the display during a measurement,the
value exceeds the range you have selected.Change to a
higher range.
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.
Rotate the function switch to the V position.
Press the MODE button to display "DC" or "AC" on the LCD
Insert the black test lead banana plug into the negative
COM jack. Insert the red test lead banana plug into the
positive V jack.
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.
Read the voltage in the display.
WARNING:
5 AC/DC Voltage Measurements
CAUTION:
•
•
•
•
•
•
•
-1
True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
V
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
5-2 DC/AC Millivolt Measurements
CAUTION:
5-3 AC/DC Current Measurements
CAUTION:
Do not measure DC/AC voltages if a motor on
the circuit is being switched ON or OFF.Large voltage surges
may occur that can damage the meter.
Rotate the function switch to the
mV DC-AC position.
Insert the black test lead banana
plug into the negative COM jack.
Insert the red test lead banana plug
into the positive V jack.
Press the MODE button to select
"DC" or "AC" millivolts.
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.
Read the voltage in the display.
Do not make 20A current measurements for longer
than 30 seconds. Exceeding 30 seconds may cause damage
to the meter and/or the test leads.
Insert black test lead banana plug
into the negative COM jack.
For current measurements up to
5000μA DC,set the function switch
to the μA position and insert the
red test lead banana plug into the
μA/mA jack.
For current measurements up to
500 mA DC,set the function switch
to the mA position and insert the
red test lead banana plug into the
μA/mA jack.
•
•
•
•
•
•
•
•
True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
V
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
•For current measurements up to 10A DC, set the function
switch to the 10A/HZ/% position and insert the red test lead
banana plug into the 10A jack.
•Press the MODE button to indicate "DC" or "AC" on the display.
•Remove power from the circuit under test, then open up the
circuit at the point where you wish to measure current.
•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.
•Apply power to the circuit.
•Read the current in the display.
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.
5-4 Resistance Measurements
WARNING:
•
•
•
"
•
•
Rotate the function switch
to the position.
Insert the black test lead
banana plug into the negative
COM jack.
Insert the red test lead
banana plug into the positive
jack.
Press the MODE button to
indicate " on the display.
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.
Read the resistance in the display.
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
5-5 Continuity Check
WARNING:
COM
MODE
DIODE TEST
COM
V
MODE
V
OL
OL
To avoid electric shock,never measure continuity
on circuits or wires that have voltage on them.
•Rotate the function switch to the
position.
•Insert the black lead banana plug
into the negative jack.
Insert the red test lead banana plug
into the positive jack.
•Press the button to indicate
" "on the display
•Touch the test probe tips to the
circuit or wire you wish to check.
•If the resistance is less than
approximately 35 , the audible
signal will sound.If the circuit is
open, the display will indicate "OL".
•Rotate the function switch to the
green position.
•Insert the black test lead banana
plug into the negative jack
and the red test lead banana plug
into the positive jack.
•Press the button to indicate
" " and " " on the display.
•Touch the test probes to the diode
under test. Forward voltage will
typically indicate 0.400 to 0.700V.
Reverse voltage will indicate " ".
Shorted devices will indicate near
0V and an open device will indicate
" " in both polarities.
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA Ω
CAP
Hz%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz %
Temp
10A
500mA
FUSED
5-6 Thermocouple Temperature Measurements
MODE
5-7 Capacitance Measurements
WARNING:
CAP
COM
V
•Rotate the function switch to the
TYPE K position.
•Insert the Temperature Probe into
the input jacks,making sure to
observe the correct polarity.
•Press the button to indicate
"ºF" or "ºC"
•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.
•Read the temperature in the display.
Note:The temperature probe is fitted with a type K mini
connector.
A mini connector to banana connector adaptor is supplied for
connection to the input banana jacks.
Note:The temperature range of the supplied thermocouple
probe is -20°C to 250°C (-4°F to 482°F)
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.
•Rotate the function switch to the
position.
•Insert the black test lead banana
plug into the negative jack.
•Insert the red test lead banana plug
into the positive jack.
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MKΩ
%ºFºC
μ
μ
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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15
True RMS Autoranging Digital Multimeter
OFF
Auto
Power
Off
10A
mA
μA
Ω
CAP
Hz
%
Temp
°C
°F
V
mV
RANGE REL PEAK
MODE
MAX
MIN
HOLD
COM
10A
mA
μA
CAT III 1000V
CAT IV 600V
20A for 30 sec MAX
every 15 min
VCAPΩ
Hz
%
Temp
10A
500mA
FUSED
•Touch the test leads to the capacitor to be tested.
•Read the capacitance value in the display.
5-
5-
8 Frequency(DUTY CYCLE)Measurements
Hz/%
COM
Hz
MODE
"%"
9 Autoranging/manual range selection
RANGE "AUTO"
RANGE
RANGE
Rotate t the function switch to
the position.
Insert the black lead banana
plug into the negative jack
and the red test lead banana
plug into the positive jack.
Touch the test probe tips to
the circuit under test.
Read the frequency on the
display.
Press the button to indi
cate .
.Read the % duty cycle in the
display.
When the meter is first 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:
•Press the key.The display indicator will turn
off.
•Press the key to step through the available ranges
until you select the range you want.
•To exit the Manual Ranging mode and return to Autoranging,
press and hold the key for 2 seconds.
Note: Manual ranging does not apply for the Temperature
functions.
•
•
•
•
•
•
0 1020304050
Auto PEAK MAX MIN HOLD
DC
AC
APO
MKHZ
nF
mA
mV
MK
Ω
%ºFºC
μ
μ

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16
MAX/MIN
MAX/MIN
"MAX"
MAX/MIN "MIN"
MAX/MIN MAX/MIN
Relative mode
PEAK HOLD
•Press the key to activate the MAX/MIN recording
mode. The display icon will appear. The meter will
display and hold the maximum reading and will update only
when a new "max" occurs.
•Press the key again and the display icon
will appear. The meter will display and hold the minimum
reading and will update only when a new "min"occurs.
•To exit mode press and hold the key
for 2 seconds.
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.
•Perform the measurement as described in the operating
instructions.
•Press and Hold the REL button to store the reading in the
display and the "REL" indicator will apear on the display.
•The display will now indicate the difference between the
stored value and the measured value.
•Press and Hold the REL button to exit the relative mode.
The Peak Hold function captures the peak AC voltage or
current.The meter can capture negative or positive peaks as
fast as 1 millisecond in duration.Press the PEAK button.
"PEAK MAX" will appear in the display, Press the PEAK key
again and the display icon "PEAK MIN" will appear.The meter
will update the display each time a higher positive and nagetive
peak occurs.Press and hold the PEAK button for 2 seconds to
exit the mode.

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17
DISPLAY BACKLIGHT
HOLD
LOW BATTERY INDICATION
AUTO POWER OFF
MODE
"APOd"
6.Maintenance
WARNING:
WARNING:
Keep The Meter Dry
Use And Store The Meter In Normal Temperatures
Press the HOLD/ key for >2 second to turn the backlight
on.The backlight will automatically turn off after 10 seconds.
The hold function freezes the reading in the display.Press the
HOLD key momentarily to activate or to exit the HOLD function.
When the low battery icon appears in the display,the
battery should be replaced.
The auto off feature will turn the meter off after 15 minutes.
To disable the auto power off feature,hold down the
button and turn the meter on. will appear in the
display. Turn the meter off and then on again to re-enable the
auto power off feature.
To avoid electric shock, disconnect the test leads
from any source of voltage before removing the back cover
or the battery or fuse covers.
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:
• .If it gets wet,wipe it off.
•.
Temperature extremes can shorten the life of the electronic
parts and distort or melt plastic parts.

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18
•
•
•
•
•
•
•
•
Handle The Meter Gently And Carefull
Keep The Meter Clean
Use Only Fresh Batteries Of The Recommended Size
And Type
If The Meter Is To Be Stored For A Long Period Of Time
6 Battery Installation
WARNING:
WARNING:
NOTE:
y. Dropping it
can damage the electronic parts or the case.
. Wipe the case occasionally with
a damp cloth. DO NOT use chemicals,cleaning solvents,or
detergents.
.Remove old or weak batteries so they do not leak
and damage the unit.
,
the batteries should be removed to prevent damage to the unit.
To avoid electric shock,disconnect the test leads
from any source of voltage before removing the battery cover.
Turn power off and disconnect the test leads from the meter.
Open the rear battery cover by removing two screws (B)
using a Phillips head screwdriver.
Insert the battery into battery holder,observing the correct
polarity.
Put the battery cover back in place.Secure with the screws.
To avoid electric shock,do not operate the meter
until the battery cover is in place and fastened securely.
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.
-1

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19
6-2 Replacing The Fuses
WARNING
WARNING:
:To avoid electric shock,disconnect the test leads
from any source of voltage before removing the meter cover.
•Disconnect the test leads from the meter.
•Remove the battery cover (two "B" screws) and the battery.
•Remove the six "A" screws securing the rear cover.
•.Gently remove the old fuse and install the new fuse into the
holder.
•Always use a fuse of the proper size and value (0.5A/1000V
fast blow for the 600 mA range 10A/1000V fast blow for the
10A range
•Replace and secure the rear cover, battery and battery cover.
To avoid electric shock, do not operate your meter
until the fuse cover is in place and fastened securely.

True RMS Industrial Multimeter User's GuideTrue RMS Industrial Multimeter User's Guide
True RMS Industrial Multimeter User's Guide
True RMS Industrial Multimeter User's Guide
20
Function
DC Voltage
AC Voltage
DC Current
AC Current
Range
50mV
500mV
5V
50V
500V
1000V
50mV
500mV
5V
50V
500V
1000V
All AC voltage ranges are specified
from 5% of range to 100% of range
500 A
5000 A
50mA
500mA
10A
(20A: 30 sec max with reduced accuracy)
500 A
5000 A
50mA
500mA
10A
(20A: 30 sec max with reduced accuracy)
All AC voltage ranges are specified from 5% of range
to 100% of range
μμ
μ
μ
μ
Resolution
0.001mV
0.01mV
0.0001V
0.001V
0.01V
0.1V
0.001mV
0.01mV
0.0001V
0.001V
0.01V
0.1V
0.01 A
0.1 A
0.001mA
0.01mA
0.001A
0.01 A
0.1 A
0.001mA
0.01mA
0.001A
μ
μ
μ
μ
Accuracy
(0.06% reading + 9digits)
(0.06% reading + 4 digits)
(0.1% reading + 5 digits)
50 to 1000Hz
(1.0% reading + 9 digits)
(1.0% reading + 3 digits)
50 to 1000Hz
(1.5% reading + 9 digits)
±
±
±
±
±
NOTE:Accuracy is stated at 18 C to 28 C (65 F to 83 F) and
less than 75% RH.
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