AC / DC POWER CLAMP MULTIMETER NI349PR Manual

AC / DC POWER CLAMP MULTIMETER NI349PR Manual
AC / DC POWER CLAMP MULTIMETER NI349PR
Manual
1. AC+DC 400/1200KW, auto-range
2. DC 2500A, AC 2100A, and AC/DC 600V.
3. φ55 mm diameter jaw.
4. One touch zero for DCA,DCW adjustment.
5. Auto-range for A, V, W, and temperature ( or )
6. Large 3 3/4 digits LCD
6. Fast bargraph display (20 times/sec.) for transient observation.
7. Continuity with buzzer.
8. Max/Min and Data Hold functions.
9. 600V overload protection for ohm measurement.
10. Easy single rotary switch for any function selection.
INTRODUCTION
1-1 Unpacking and Inspection
Upon removing your new Digital Clamp Multimeter from its packing, you should have the following items:
1. Digital Clamp Multimeter.
2. Test lead set (one black, one red).
3. Carrying case.
4. Instruction manual.
5. Battery.
1-2 Meter Safety
Terms as Marked on Equipment
ATTENTION — Refer to Manual.
DOUBLE INSULATION — Protection Class II.
DANGER — Risk of electric shock.
Symbols in this Manual
This symbol indicates where cautionary or other information is found in the manual.
Battery
1-3 Front Panel
Refer to Figure 1 and the following numbered steps to familiarize yourself with the meter’s front panel controls
and connectors.
1.
Transformer Jaw
This is used to pick up current signal. To measure DC/AC current, conductor must be enclosed by the jaw.
2.
Transformer Trigger
This is used to open the jaw.
3.
Data Hold Button
Once this button is pushed, reading shall be held on the LCD. Press again to release it.
4.
Function Selection and On/Off Switch
This is used to select the function user desired, such as DCA, ACA,AC+DC W, DCV, ACV, Temperature, and
Continuity.
5.
Data Hold Symbol
Once the hold button is pressed, this symbol appears on LCD.
6.
7.
8.
9.
10.
11.
12.
Max/Min Hold Symbol
Once the max/min button is pressed, either MAX or MIN shall be displayed on LCD
Units Symbols
Once a function is selected, corresponding unit (V, Ω, A, or Hz) shall be displayed on LCD.
LCD
This is a 3 3/4 digit Liquid Crystal Display with maximum indication of 3999. Function symbols, units, bargraph,
sign, decimal points, low battery symbols, max/min symbols, and zero symbol are included.
Zero/Relative Symbol
When this symbol appears, it means a reference value has been subtracted from the actual reading. The
reading shown is a offseted value. Press and hold the zero button for 2 seconds to disable this function.
Low Battery Symbol
When this symbol appears, it means the battery voltage drops below the minimum required voltage. Refer to
Section V for battery replacement.
Bargraph
Bargraph has forty segments. It displays segments proportional to the actual reading. Each segment
represent ten counts.
Relative Button
Once this button is pressed, the current reading shall be set to zero and be used as a zero reference value for
all other subsequent measurement. The function can also be used to offset value caused by the residual
magnetism remained in the core for the DC current or wattage measurement. Once this button is pressed, the
clamp meter will change to manual mode instead of auto-range mode. The Relative function will be disabled if
Max/Min function is enabled.
13
14.
15.
16.
17.
DCA/W ZERO button
This button is used for DCA ZERO function. To zero the DCA residual value, press this button until the LCD
reading show zero value. If DCA ZERO button is used to zero DCA value, the clamp meter is still in auto-range
mode. It is different from the relative button which forces the clamp meter change to manual mode.
Max/Min Hold Button
This button is used to enable the maximum or minimum value to be displayed and updated during
measurement. Press once, minimum value shall be displayed and updated. Press again, maximum value
shall be displayed and updated. Press again (the third push), clamp meter return to normal measurement
mode. Zero function will be disabled if MAX/MIN is enabled.
RANGE button
Once the button is pressed, the clamp meter goes into manual mode. To select users' desired range, press
and release the button once. To return to manual mode, press and hold the button for more than 2 seconds.
COM Terminal
This terminal is used as common reference input.
V Input Terminal
This terminal is used as input for voltage, continuity, or temperature measurements.
Figure 1
SPECIFICATIONS
2-1 General Specifications
Conductor Size
Battery Type
Display
Range Selection
Overload Indication
Power Consumption
Low battery Indication
Sampling Time
Dimension
Weight
Accessories
Options:
: Cable Φ55mm. (approx.)
: Bus Bar 65mm(D) x 24mm(W)
: 9V
: 3 3/4 LCD with 40 seg. bargraph
: Auto and manual
: left most digit blinks
: 12 mA (approx.)
: B
: 2 times/sec. (display) 20 times/sec. (bargraph)
: 271mm (L) x 112mm (W) x 46mm (H)
: 10.7" (L) x 4.4" (W) x 1.8" (H)
: 647 g/22.8 oz (batteries included)
: Carrying bag x 1
: Users manual x 1
: 9V battery x 1, installed
:Thermal couple adapter
:K-type thermal couple
2-2 Environmental Conditions
Indoor use.
Maximum Altitude
Installation Category
Pollution Degree
Operating Temperature
Operating Humidity
Storage Temperature
Storage Humidity
: 2000 Meter.
: EN 61010-1 CAT. III 600V
:2
: 4°C to 50°C
: less than 85% relative
: -20°C to 60°C
: less than 75% relative
2-2 Electrical Specifications
Accuracy is ± (% reading + number of digits) at 23°C ± 5°C at less than 80% R.H.
(1)
AC Voltage : Auto-ranging
Accuracy (of reading)
50/60 Hz
40 - 1KHz
Range
Resolution
Input Impedance
400mV
0.1mV
--------1
---------1
---------1
4V
0.001
±1.5%±5dgts
±2.0%±5dgts
5MΩ
40V
0.01V
±1.5%±5dgts
±2.0%±5dgts
5MΩ
400V
0.1V
±1.5%±5dgts
±2.0%±5dgts
5MΩ
600V
1V
±1.5%±5dgts
±2.0%±5dgts
5MΩ
1 400mVAC is not designed to measured AC mV. So no accuracy is listed.
AC Voltage( True RMS, Crest Factor < 3,Autorange & Manual, Overload Protection 800VAC for all range)
(2) DC Voltage : Auto-ranging
Range
Resolution
Accuracy(of rdg)
Input Impedance
400mV
0.1mV
±1.5%±3dgts
10MΩ
4V
0.001V
±1.5%±3dgts
5MΩ
40V
0.01V
±1.5%±3dgts
5MΩ
400V
0.1V
±1.5%±3dgts
5MΩ
600V
1V
±1.5%±3dgts
5MΩ
Overload Protection 800VAC for all range
(3) Resistance Auto-ranging
Range
Resolution
Accuracy
40-400Ω
0.1Ω
±1.0% rdg±2dgts
Beeping
< 40.0 Ω
OL Protection
AC 600V
open voltage 0.4V
(4) Continuity
Built-in buzzer sound when measured resistance is less than 40Ω and sound off when measured resistance is
more than > 300Ω .
Between 50Ω to 300Ω the buzzer maybe sound or off either.
(5) DCA : Auto-ranging
Range
Resolution
Accuracy (of rdg)
Overload Protection
400A
0.1A
±1.5%±3dgts
DC 3000A
0-2000A
1A
±1.5%±3dgts
DC 3000A
2000-2500A
1A
±2.0%±3dgts
DC 3000A
(6) ACA : Auto-ranging
Accuracy (of rdg)
Range
Resolution
50/60 Hz
40 - 1KHz
Overload
Protection
400A
0.1A
±1.5%±5dgts
±2.0%±5dgts
AC 3000A
0-1000A
1A
±2.0%±5dgts
±2.5%±5dgts
AC 3000A
1000-2100A
1A
±2.5%±5dgts
±3.0%±5dgts
AC 3000A
True RMS, Crest Factor < 3
(8) Current analog output
Range
0 - 400A
400 - 2100A
Output
1mV/A
1mV/A
Accuracy
±2.5% ±0.5A
±2.5% ± 5A
Overload Protection
600V AC
600V AC
(9) AC + DC power
250V max., Auto-range and Manual
Range
Resolution
Accuracy
(of reading)
Overload Protection
40KW
0.01KW
±2.5%±5dgts
600VAC
400KW
0.1KW
±2.5%±5dgts
600VAC
600V max., Auto-range and Manual
Range
Resolution
Accuracy
(of reading)
Overload Protection
400KW
0.1KW
±2.5%±5dgts
600VAC
1200KW
1KW
±2.5%±5dgts
600VAC
(11) Temperature
Range
Resolution
Accuracy
Overload Protection
-50 – 400 °C
0.1 °C
±1.% ±2 °C
600VAC
-400 – 1000 °C
1 °C
±1.% ±2 °C
600VAC
-50 – 400 °C
0.1 °C
±1.% ±3 °C
600VAC
-400 – 1000 °C
1 °C
±1.% ±3 °C
600VAC
OPERATION
This instrument has been designed and tested in accordance with NEN EN Publication 61010, Safety Requirements for
Electronic Measuring Apparatus and has been supplied in a safe condition. This instruction manual contains some
Information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in
safe condition.
3-1 Preparation and Caution before Measurement
1. If the meter is used near equipment that generates electro-magnetic interference, the display may be unstable
or indicate incorrect measurement values.
2. Make sure that the battery is properly connected.
3. The instrument should only be operated between 0°C ~ 50°C and at less than 80% R.H.
4. Do not use or store this instrument in a high temperature or high humidity environment and do not store the
unit in direct sunlight.
5. Do not replace battery with power on condition.
6. If the unit is not to be used for a long period of time , remove the battery.
7. Do not forget to turn off after use.
8.
Maximum rated voltage to earth for voltage measurement terminals is 600V CAT.III
THIS INSTRUMENT MUST NOT BE USED ON UNINSULATED CONDUCTORS AT A
VOLTAGE GREATER THAN 600V ac/dc.
3-2 AC Current Measurement
a. Set the rotary switch at AC A.
b. In AC current measurement, ZERO is not needed. Do not press DC A ZERO button.
c. Press the trigger to open the jaw and fully enclose the conductor to be measured. No air gap is allowed between the
two half jaws.
d. The clamp meter will automatically select proper range. If users want to select range, press the range button before
pressing the DC A ZERO button.
e. Read the measured value from the LCD display.
3-3 DC Current Measurement
a. Set the rotary switch at DC A.
b. Push and hold the DC A ZERO button until the reading shows zero.
c. Press the trigger to open the jaw and fully enclose the conductor to be measured. No air gap is allowed between the
two half jaws.
d. The clamp meter will automatically select proper range. If users want to select range, press the range button before
pressing the DC A ZERO button.
e. Read the measured value from the LCD display.
Note
There are two ways to zero the DC A residual value, If users use the DC A zero button, the
clamp meter is in auto-range mode. If users use the REL button, the clamp meter will
change to manual mode for DC A measurement.
3-4 Connecting to an Oscilloscope or a Datalogger
a.
b.
c.
d.
Set the rotary switch at AC A or DC A
Analog signal is output from the bottom terminals at the same time. The output is proportional to the current
measured (1mV/A).
The red terminal is the positive while the black is the negative of the signal.
Connect these two terminals to an oscilloscope or a datalogger, users can observe the current wave form or do
the long term data recording.
3-5 AC/DC Voltage Measurement
WARNING
Maximum input for DC V is 1000, and for AC V is 750. Do not attempt to take any voltage
measurement that exceeds the limits. Exceeding the limits could cause electrical shock and
damage to the clamp meter.
3-5-1.DC Voltage
a. Set the rotary switch at V DC.
b. Insert the test leads into the input jack.
c. Connect the test prods of the test leads in PARALLEL to the circuit to be measured.
d. The clamp meter will automatically select proper range. If users want to select range, press the range
button.
e. Read the measured value from the LCD display.
3-5-2.AC Voltage
a. Set the rotary switch at V AC
b. Insert the test leads into the input jack.
c. Connect the test prods of the test leads in PARALLEL to the circuit to be measured.
d. The clamp meter will automatically select proper range. If users want to select range, press the range
button.
e. Read the measured value from the LCD display.
3-6 AC+DC Watt Measurement
a. Set the rotary switch at KW/600V or KW/250V.
b. Insert the test leads into the input jack.
c. Connect the test probes of the test leads to the circuit to be measured (COM to ground, V to active line).
d. Clamp on to the active line
e. The watt clamp meter will automatically select proper range. If users want to select range, press the range button.
f .Read the measured value from the LCD display.
3-7 Temperature Measurement
Turn the switch to the temperature position. Connect the adapter (optional) to the V terminal. Then plug in the K type
thermal couple to the adapter. LCD will display the temperature measured
3-8 Continuity Measurement
a. Set the rotary switch at Continuity
b. Insert the test leads into the input jack.
c. Connect the test prods of the test leads to the two ends of the resistor or circuit to be measured.
d. Read the measured value from the LCD display.
e. If the resistance is lower than 40 Ω, a beeping sound will be heard
3.9 Change from Auto-range Mode to Manual Mode
If users want to select certain range for specific measurement, they can press the RANGE button to select appropriate
range. To return to auto-range, press and hold the RANGE button for 2 seconds.
3.10 Relative Reading Measurements
The REL button can be used to make a relative measurement. Once the button is pushed, the current reading is set to
zero and a zero symbol shall be displayed on LCD. All the subsequent measurement shall be displayed as a relative
value with respect to the value being zeroed. Press the zero button for 2 seconds to return to normal mode. But this
function is disabled if MAX/MIN function is enabled. Please watch for symbol displayed on LCD.
3.11 Holding the LCD Reading
Press the HOLD button, then the reading shall be hold and kept on LCD.
3.12 Finding the MAX/MIN Value
Press the MAX/MIN button to enable the maximum and minimum values to be recorded and updated during
measurement. Push the button once, the maximum value shall be displayed and updated. Push again (second push),
the minimum value shall be displayed. Push again (third push), MAX/MIN function shall be disabled and return to the
normal measurement mode. If MAX/MIN button is pressed, the ZERO function will be disabled and the ZERO symbol
will disappear from LCD.
MAINTENANCE
WARNING : TO AVOID ELECTRICAL SHOCK OR DAMAGE REMOVE TEST LEADS BEFORE OPENING
THE COVER.
4-1 General Maintenance
Servicing not covered in this manual should only be performed by qualified personnel. Repairs should only be
performed by qualified personnel.
Periodically wipe the case with a damp cloth and detergent; do not use abrasives or solvents.
4-2 Battery Installation or Replacement
When the low battery symbol is displayed on the LCD, replace the old battery with new battery.
a.Turn the power off and remove the test leads from the clamp meter.
b.Remove the screws of the bottom case.
c.Lift and remove the bottom case.
d.Remove the old battery.
e.Insert new 9V battery.
f.Replace the bottom case and secure the screws.
WARNING
Do not touch or adjust any parts inside the clamp meter when the bottom case is open.
Nieaf-Smitt B.V.
Vrieslantlaan 6, 3526 AA, Utrecht
P.O. Box 7023, 3502 KA, Utrecht, The Netherlands
Tel.: +31 (0) 30 288 13 11
Fax: +31 (0) 30 289 88 16
E-mail: sales@nieaf-smitt.nl
Internet: http://www.nieaf-smitt.nl
http://www.nieaf-instruments.com
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