AC/DC True RMS Power Clamp Meter
ELECTRONIC TEST INSTRUMENTS
MODEL 325
CONTENTS
1. FEATURES ................................................ 2
2. Safety precaution ........................................ 2
Symbols Description .................................... 3
3. Specifications.............................................. 4
4. Electrical Specifications ................................ 4
800A rms ........................................... 4
800Arms (60 second).............................. 4
DC 500V AC500V rms ............................ 5
600V rms ........................................... 6
DC600V
........................................... 6
AC600V rms.......................................... 6
5. Instrument Description (fig.1)......................... 6
6. Alignment marks ......................................... 8
7. Measurement .............................................. 8
7-1. DC Current (DCA) measurement ............. 8
7-2. AC Current (ACA) measurement .............. 9
7-3. DC Voltage (DCV) measurement ............. 10
7-4. AC Voltage (ACV) measurement .............. 10
7-5.AC+DC Watt Measurement ...................... 11
7-6.Resistance measurements....................... 11
7-7.Continuity Tests ..................................... 12
7-8.Frequency measurements ....................... 13
7-9.Function key descriptions ........................ 13
?
HOLD function.................................... 13
?
ZERO relative function......................... 14
?
MAX MIN function ............................... 14
?
PEAK –H (PEAK HOLD) function........... 15
?
AUTO POWER OFF function ................ 16
7-10. Measuring non-sinusoidal quantity ......... 16
?
TRUE RMS MEASUREMENT ............... 16
?
WAVEFORM COMPARISON ................ 17
?
Battery Replacement ........................... 18
?
Maintenance and Cautions ................... 19
325
1.
FEATURES
Thank you for purchasing this instrument. Please read
this instruction manual carefully and completely before
using the digital clamp meter. Correct operation will
insure the best performance and decrease the
possibility of damages.
2.
SAFETY PRECAUTION
CAUTION
Take extreme care for the
conditions while measuring
following
1. Measuring voltage over 20V as it may cause human
body electricity conduction.
2. Measure AC power.
3. Do not measure voltage, current under humid or wet
environment.
4. If any unusual condition (such as: breakage,
deformation, fracture, foreign substance, no display,
etc.) of the test leads end (metal part) and
attachment of the meter, please do not conduct any
measurement.
5. Do not contact any exposed metal (conductive)
parts, such as : end of test lead, jack, fixing object,
circuit, etc .
6. Keep you insulated from the object waiting for being
measured.
7. Do not operate the meter under the environment
with explosive gas (material), combustible gas
(material) steam or filled with dust.
EN-2
325
8. In order to avoid reading incorrect data, replace the
battery immediately when the symbol “ ” appears
on the LCD.
9. In order to avoid the damage caused by
contamination or static electricity, do not touch the
circuit board before you take any adequate action.
10. Operating Environment: Indoors use. This
instrument has been designed for being used in an
environment of pollution degree 2.
11. Operation Altitude: Up to 2000M.
12. Operating Temperature & Humidity: 5
?
~ 40
?
,below 80%RH.
13. Storage Temperature & Humidity: -10? ~ 60? ,
below 70%RH.
14. Fingers should hold under the protection guard of
test probe.
15. Category: EN 61010-1(2001) and EN 61010-2-
032(2002) CAT
?
600V & CAT
?
1000V
16.SYMBOLS DESCRIPTION
DC Voltag e or Current
AC Voltage or Current
DC/AC Voltage or Current
Ground
Meter Double insulated
Caution
Danger high voltage: risk of electric shock
Application around and removal from
hazardous live conductors is permitted
EN-3
325
3.
SPECIFICATIONS
1. Display: 3 3/4 digits LCD with max. reading 3999,
plus decimal point, unit symbol indication.
2. Overload Indication: LCD will show “OL” in the left
highest position.
3. Low Battery Indication: Replace battery immediately
when LCD displays “ ”.
4. Sampling Rate: 2 times per second for digital display.
5. Power Supply: 9V NEDA 1604 IEC 6F22 JIS 006P
battery x 1pc.
6. Battery Life: About 200 hours.
7. Jaws opening: Max. 36 mm.
8. Conductor size: Max. 35mm.
9. Dimension: 218mm(L)x75mm(W)x43mm(H).
10.Weight: About 375g. (Including battery)
11.Accessories : Test Leads
?
manual? carrying case
?
battery.
4.
ELECTRICAL SPECIFICATIONS
Accuracy:
±(..%rdg…dgt)at
23?
±5?
,
below 80? RH
DCA
Range
400A
600A
Resolution
0.1A
1A
Resolution
0.1A
1A
Accuracy
±
(1.5%+5)
±
(2.0%+5)
Accuracy
50Hz~60 Hz
±
(2.0%+5)
±
(2.5%+5)
Overload Protection
800A rms
(60 second)
ACA
Range
400A
600A
Overload Protection
800Arms
(60 second)
EN-4