Megger DCM320 User manual

Power On / Off AC V / DC V
Auto Power Off Resistance
The meter will automatically shut itself
off after approximately 10 minutes after
power on.
Continuity
Data Hold
User Guide
DCM320 Clampmeter
Warning
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Safety sheet
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. . . . . . . . . Read First
Safety Information
To ensure safe operation and service
of the Meter, follow these instructions.
Failure to observe warnings can result
in severe injury or death.
-Avoid working alone so assistance can
be rendered.
- To enhance safety, test leads should be
disconnected from instrument when not
in use.
- Do not use test leads or the Clamp
Meter if they look damaged.
- Do not use the Meter if the Clamp
Meter is not operating properly or if it
is wet.
- Use the Clamp Meter only as specified
in the Instruction card or the protection
provided by the Clamp Meter might be
impaired.
- Special precautions are necessary
when operating in situations where
exposed live parts at dangerous
voltages may be encountered. Personal
protective equipment (not supplied with
this instrument) should be used.
Symbols as marked on the
Tester and Instruction card
Risk of electric shock
See instruction card
Equipment protected by double or
reinforced insulation
Battery
Earth
Conforms to EU directives
FApplication around and removal
from hazardous live conductors is
permitted
Do not discard this product or
throw away
Maintenance
Do not attempt to repair this Clamp Meter.
It contains no user-serviceable parts.
Repair or serving should only be
performed by qualified personal.
Cleaning
Periodically wipe the case with a dry
cloth and detergent do not use
abrasives or solvents.

ACA
1-3 Electrical Specifications
Accuracy is ±(% reading + number
of digits) at 23°C ±5°C < 80%RH.
Temperature coefficient :
Add 0.2 x (Specified accuracy) / °C,
< 18°C, > 28°C .
DC / AC Volts
Range DC Accuracy AC Accuracy
±(1.0% + 2dgt) ±(1.5% + 5dgt)
50Hz ~ 500Hz
200.0V
600V
Over voltage protection :
DC / AC 600V
Input Impedance :
10MΩ// less than 100pF.
CMRR / NMRR :
(Common Mode Rejection Ratio)
(Normal Mode Rejection Ratio)
VAC : CMRR > 60dB at DC,
50Hz / 60Hz
VDC : CMRR > 100dB at DC,
50Hz / 60Hz
NMRR > 50dB at DC,
50Hz / 60Hz
AC Conversion Type :
Average sensing rms indication.
Range Accuracy
200.0 Ω*3 ±(1.0% + 5 dgt) *2
2.000 KΩ*3
20.00 KΩ*3
200.0 KΩ*3
2.000MΩ*3 ±(1.0% + 2 dgt)
20.00 MΩ ±(1.9% + 5 dgt) *1
±(0.7% + 2 dgt)
Overload protection : 600V rms
Open circuit Voltage :
-1.3V approx.
* 1 < 100 dgt rolling.
* 2 < 10 dgt rolling.
* 3 The maximum LCD reading is
1400 counts.
Continuity :
Internal beeper activates if the
resistance of the circuit under test
is less than 20Ω. It will then turn off
if the resistance is increased
beyond 50Ω. Response time is
approximately 50m sec.
Overload protection : 600V rms.
Function Range Accuracy
0.0 ~ 40.0A ±(1.9% + 10 dgt)
40.0 ~ 200.0A ±(1.9% + 5 dgt)
201 ~ 400A ±(1.9% + 5 dgt)
A
(50~60Hz)
Overload protection : 600A rms
AC Conversion Type :
Average sensing rms indication.
Position Error : ±1.0% of reading.
AC Current Limited Warranty
This Meter is warranted to the original
purchaser against defects in material
and workmanship for 1 year from the
date of purchase. During this warranty
period, manufacturer will, at its option,
replace or repair the defective unit,
subject to verification of the defect or
malfunction.
This warranty does not cover ,
disposable batteries, or damage from
abuse, neglect, accident, unauthoriz-
ed repair, alteration, contamination,
or abnormal conditions of operation
or handling.
Any implied warranties arising out of
the sale of this product, including but
not limited to implied warranties of
merchantability and fitness for a
particular purpose, are limited to the
above. The manufacturer shall not be
liable for loss of use of the instrument
or other incidental or consequential
damages, expenses, or economic
loss, or for any claim or claims for
such damage, expense or economic
loss. Some states or countries laws
vary, so the above limitations or
exclusions may not apply to you.
Operating altitude : 2000m (6562 ft)
Conductor Size : 27mm diameter.
Pollution degree : 2
EMC : EN 61326-1
Shock vibration :
Sinusoidal vibration per MIL-T-
28800E (5 ~ 55 Hz, 3g maximum).
Drop Protection :
1.2m drop to hardwood on concrete
floor.
Dimensions (W x H x D) :
56mm x 188mm x 28mm
Weight : 225g including battery.
Accessories : Battery (installed),
Carrying case, Test lead and User
manual.
ⅠThe circuits are not connected to
mains.
ⅡThe circuits are directly connected
to Low-voltage installation.
ⅢThe building installation.
ⅣThe source of the Low-voltage
installation.
Resistance
I
I
I
I
a
I + (-I) = 0
Specifications
1-1 General Specifications
LCD display digits :
3 1/2 digit large scale LCD readout.
Display count : 2000 counts.
Measuring rate : 1.5 times / sec.
Overrange display :
“OL” is displayed for “Ω” functions,
shows the real value for “A” and “V”
function.
Automatic power off time :
Approximately 10 minutes after
power on.
Low battery indicator :
=is displayed.
Power requirement :
1.5V AAA x 2 battery.
Rechargeable batteries are not
suitable for use with this instrument.
1-2 Environmental Conditions
Indoor Use.
Calibration :
One year calibration cycle.
Operating temperature :
0°C ~ 30°C (≦80% RH)
30°C ~ 40°C (≦75% RH)
40°C ~ 50°C (≦45%RH)
Storage temperature :
-20 to +60°C, 0 to 80% RH (batteries
not fitted).
Overvoltage category :
IEC 61010-1 600V CAT.Ⅲ.
CAT Application field
Battery Replacement
CAT.Ⅲ.600V
with respect to
earth for the jaw.
Tactile barrier for
Hand Guard.
Do not hold the
meter in front of
the Tactile Barrier.
rr
Megger Limited
Archcliffe Road, Dover, CT17 9EN
United Kingdom
Tel [phone]
Valley Forge Corporate Centre
2621 Van Buren Avenue, Norristown
PA 19403, USA
Tel [phone]
Email [e-mail]
Web www.megger.com