CAMBRIDGE EM830 Series Manuel utilisateur
WARRANTY
DIGITAL MULTIMETER
EM830 SERIES
TL13712 User’s Manual
110981
ID: 00469
1
The multimeter has been designed according to
IEC-61010 concerning electronic measuring instruments
with a measurement category (CAT III 300V) and Pollution
degree 2.
This instrument is warranted to be free from defects in
material and workmanship for a period of one year. Any
instrument found defective within one year from the
delivery date and returned to the factory with transpor-
tation charges prepaid, will be repaired, adjusted, or
replaced at no charge to the original purchaser. This
warranty does not cover expandable items such as
battery or fuse. If the defect has been caused by a
misuse or abnormal operation conditions, the repair will
be billed at a nominal cost.
SAFETY INFORMATION
WARNING
!
To avoid possible electric shock or personal injury, follow
2
these guidelines:
· Do not use the meter if it is damaged. Before using the
meter, inspect the case. Pay particular attention to the
insulation surrounding the connectors.
· Inspect the test leads for damaged insulation or
exposed metal. Check the test leads for continuity.
Replace damaged test leads before you use the meter.
· Do not use the meter if it operates abnormally.
Protection may be impaired. When in doubt, have the
meter serviced.
· Do not operate the meter around explosive gas, vapor,
or dust.
· Do not apply more than the rated voltage, as marked on
the meter, between terminals or between any terminal
and earth ground.
· Before use, verify the meter’s operation by measuring a
known voltage.
· When measuring current, turn off circuit power before
connecting the meter in the circuit. Remember to place
the meter in series with the circuit.
· When servicing the meter, use only specified replace-
ment parts.
· Use caution when working with voltage above 30V ac
rms, 42V peak, or 60V dc. Such voltages pose a shock
hazard.
· When using the probes, keep fingers behind the finger
guards on the probes.
· When making connections, connect the common test
lead before connecting the live test lead. When discon-
necting test leads, disconnect the live test lead first.
3
· Turn off the meter and remove the test leads from the meter
before opening the back cover or the case.
· Do not operate the meter with the back cover or portions of
the case removed or loosened.
· To avoid false readings, which could lead to possible electric
shock or personal injury, replace the battery as soon as the
low battery indicator ( ) appears.
· To avoid electric shock, do not contact any open conductor
with hands or skin. Do not ground yourself while using the
meter.
· Remaining endangerment:
When an input terminal is connected to dangerous live
potential, it is to be noted that this potential can occur at all
other terminals.
· CAT III - Measurement category III is for measurements
performed in the building installation. Examples are
measurements on distribution boards, circuit breakers,
wiring, including cables, bus-bars, junction boxes, switches,
socket-outlets in the fixed installation, and equipment, for
example, stationary motors with permanent connection to the
fixed installation. Do not use the meter for measurements
within Measurement Categories IV.
CAUTION
To avoid possible damage to the meter or to the equipment
being tested, follow these guidelines:
· Disconnect circuit power and discharge all capacitors before
measuring resistance, diode, temperature, or continuity.
· Use the proper terminals, function, and range for measure-
ments.
· Before measuring current, check the meter’s fuses and turn
off the power to the circuit before connecting the meter to the
circuit.
4
· Before rotating the rotary switch to change functions,
disconnect test leads from the circuit under test.
ELECTRICAL SYMBOLS
Alternating Current
Direct Current
Both direct and alternating current
Caution, risk of danger, refer to the operating
manual before use
Caution, risk of electric shock
Earth (ground) Terminal
Fuse
Conforms to European Union directives
The equipment is protected throughout by double
insulation or reinforced insulation
INTRODUCTION
The EM830 series meters are compact 3 ½-digit digital
multimeters designed to measure DC and AC voltage, DC
current, resistance and diode. Some models also have
continuity, temperature or battery measurement function
or signal output function.
These meters feature low batery indication and full range
overload protection. They are ideal measurement tools.
Except where noted, the descriptions and instructions in
this manual apply to EM830, EM830B, Em830C and
EM830D. Illustration uses EM830.
Different models have different functions, see the
following table:
1
2
5
4
3
means squarewave signal output function
means sinewave signal output function
EM830
EM830B
EM830C
EM830D
DCV ACV DCA TEMP BATT
FUNC
MODEL
1
INSTRUCTIONS
1. Display
3 ½-digit LCD, with a max. reading of 1999
2. Function / Range Switch
Used to select the desired function and range as well as
to turn on or off the meter. To save battery life, set this
function/range switch to the "OFF" position when the
meter is not in use.
3. "COM" Terminal
Plug in the black test lead connector for all measure-
ments except temperature measurements. For tempera-
ture measurements, this "COM" terminal is a plug-in
connector for the negative plug of the K type thermocouple.
4. "VmAΩ " Terminal
Plug in the red test lead connector
for all measurements except
temperature measurements and
current measurements 200mA.
For temperature measurements,
"VmAΩ " is a plug-in connector
for the positive plug of the K type
thermocouple.
5. "10A" Terminal
Plug in the red test lead connector for
current (200mA - 10A) measurements.
5
6
GENERAL SPECIFICATIONS
Display: 3 ½-digit LCD, with a max. reading of 1999
Negative Polarity Indication: Negative sign "–" shown
on the display automatically
Sampling Rate: About 2 to 3 times/sec
Battery: 9V battery, 6F22 or equivalent, 1 piece
Low Battery Indication: shown on the display
IP Degree: IP20
Operating Altitude: 0 to 2000 meters
Operation Environment: Temperature: 0˚C to 40˚C ·
Relative Humidity: <75%RH
Storage Environment: Temperature: -10˚C to 50˚C ·
Relative Humidity: <85%RH
Size: 126mm x 70mm x 26mm
Weight: about 135g (including battery)
SPECIFICATIONS
Accuracy is specified for a period of one year after
calibration at 18˚C to 28˚C, with relative humidity up to 75%
Accuracy specifications take the form of: ± [(% of
Reading) + (Number of Least Significant Digits)]
DC Voltage
""
Input Impedance: 10 MΩ
Max. Allowable Input Voltage: 300V
Resolution Accuracy Overrange
Indication
200mV
2V
20V
200V
300V ± (1.0% + 5)
Range
0.1mV
0.001V
0.01V
0.1V
1V
± (0.8% + 5) "OL" shown
on the
display
7
AC Voltage Input Impedance: 10MΩ
Frequency Range: 40Hz to 400Hz
Response: Average, calibrated in rms
of sine wave
Max. Allowable Input Voltage: 300V
Resolution Accuracy
200V
300V ± (1.2% + 10)
Range
0.1V
1V
DC Current
Resolution Accuracy
20μA
200μA
2000μA
20mA
200mA
10A
± (1.2% + 5)
± (2.0% + 5)
Range
0.01μA
0.1μA
1μA
0.01mA
0.1mA
0.01A
Overload Protection: 250mA/300V Fast fuse (for
protection for the inputs of terminal)
10A/300V Fast fuse (for protection for the inputs of
"10A" terminal)
Max. Allowable Input Current:
10A (For measurements >2A: measurement
duration < 10 secs, and interval >15 minutes.)
Note: Only the EM830B has 20μA and 200μA ranges.
"VmAΩ "
Max. Open Circuit Voltage: about 1V
Resistance
Overrange
Indication
"OL" shown
on the display
Overrange
Indication
"OL" shown
on the display
8
· Turn off the meter and remove the test leads from the meter
before opening the back cover or the case.
· Do not operate the meter with the back cover or portions of
the case removed or loosened.
· To avoid false readings, which could lead to possible electric
shock or personal injury, replace the battery as soon as the
low battery indicator ( ) appears.
· To avoid electric shock, do not contact any open conductor
with hands or skin. Do not ground yourself while using the
meter.
· Remaining endangerment:
When an input terminal is connected to dangerous live
potential, it is to be noted that this potential can occur at all
other terminals.
· CAT III - Measurement category III is for measurements
performed in the building installation. Examples are
measurements on distribution boards, circuit breakers,
wiring, including cables, bus-bars, junction boxes, switches,
socket-outlets in the fixed installation, and equipment, for
example, stationary motors with permanent connection to the
fixed installation. Do not use the meter for measurements
within Measurement Categories IV.
CAUTION
To avoid possible damage to the meter or to the equipment
being tested, follow these guidelines:
· Disconnect circuit power and discharge all capacitors before
measuring resistance, diode, temperature, or continuity.
· Use the proper terminals, function, and range for measure-
ments.
· Before measuring current, check the meter’s fuses and turn
off the power to the circuit before connecting the meter to the
circuit.
Resolution Accuracy
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
± (1.2% + 5)
Range
0.1Ω
0.001kΩ
0.01kΩ
0.1kΩ
0.001MΩ
Note:
1. Use K type thermocouple
2. Accuracy does not include error of the thermocouple probe.
3. Accuracy specication assumes ambient temperature
is stable to ±1˚C. For ambient temperature changes of
±5˚C, rated accuracy applies after 1 hour.
[1] If the temperature being measured is out of the range of 0ºC to
1000ºC or 0ºF to 1400ºF, the display may show a reading; but the
measurement error may be large or the thermocouple may be damaged.
Frequency Output Level
(squarewave)
(sinewave)
about 3.0Vp-p
about 0.8Vp-p
Range
about 50Hz
about 1kHz
Signal Output (EM830D only)
The working voltage of the
battery will be shown on the
display so that the quality of
the battery can be judged
Description Remark
1.5V
9V
Test Current:
about 20mA
Test Current:
about 5mA
Range
Battery (EM830 only)
Overrange
Indication
"OL" shown
on the display
Resolution Accuracy
0˚C - 1000˚C
0˚F - 1400˚F
± (2.0% + 3)
± (2.0% + 5)
Range
1˚C
1˚F
Temperature (EM830C only)
Overrange
Indication
[1]
OPERATING INSTRUCTIONS
Measuring DC Voltage
1. Connect the black test lead to the "COM" terminal and
the red test lead to the terminal.
2. Set the range switch to desired range position.
If the magnitude of the voltage to be measured is not
known beforehand, set the range switch to the highest
range first and then reduce it range by range until
satisfactory range is obtained.
3. Connect the test leads across the source or circuit to
be measured.
4. Read the display reading. The polarity of the red test
lead connection will be indicated as well.
Note: To avoid electric shock or damages to the meter, do
not apply a voltage higher than 300V between
terminals.
The display shows the approx. forward
voltage drop of the diode.
Open Circuit Voltage: about 2.2V
Test Current: about 1mA
DescriptionRange
Diode Test
The built-in buzzer will sound if the
resistance is less than about 20Ω
The buzzer will not sound if the resistance
is more than about 150Ω
The buzzer may or may not sound if the
resistance is between 20Ω & 150Ω
DescriptionRange
Continuity (EM830, EM830C and EM830D only)
9
"VmAΩ "
Measuring AC Voltage
1. Connect the black test lead to the "COM" terminal and
the red test lead to the terminal.
2. Set the range switch to desired range.
If the magnitude of the voltage to be measured is not
known beforehand, set the range switch to the highest
range first and then reduce it range by range until
satisfactory range is obtained.
3. Connect the test leads across the source or circuit to
be measured.
4. Read the display reading.
Note: To avoid electric shock or damages to the meter,
do not apply a voltage higher than 300V between
terminals.
Measuring DC Current
1. Connect the black test lead to the "COM" terminal.
Connect the red test lead to the terminal if
the current to be measured is less than 200mA. If the
current is between 200mA and 10A, connect the red test
lead to the "10A" terminal instead.
2. If the red test lead is connected to the
terminal, set the range switch to the desired range
position in the area. If the red test lead is connected to
the "10A" terminal, set the range switch to the
range position.
3. Turn off power to the circuit to be tested. Then
discharge all capacitors.
4. Break the circuit path to be measured, then connect
the test leads in series with the circuit.
5. Turn on power to the circuit, then read the display. The
polarity of the red test lead connection will be indicated
as well.
"VmAΩ "
INSTRUCTIONS
1. Display
3 ½-digit LCD, with a max. reading of 1999
2. Function / Range Switch
Used to select the desired function and range as well as
to turn on or off the meter. To save battery life, set this
function/range switch to the "OFF" position when the
meter is not in use.
3. "COM" Terminal
Plug in the black test lead connector for all measure-
ments except temperature measurements. For tempera-
ture measurements, this "COM" terminal is a plug-in
connector for the negative plug of the K type thermocouple.
4. "VmAΩ " Terminal
Plug in the red test lead connector
for all measurements except
temperature measurements and
current measurements 200mA.
For temperature measurements,
"VmAΩ " is a plug-in connector
for the positive plug of the K type
thermocouple.
5. "10A" Terminal
Plug in the red test lead connector for
current (200mA - 10A) measurements.
"VmAΩ "
10
"VmAΩ "
Ce manuel convient aux modèles suivants
3
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