AMP-25
AMP-25-EUR
Mini-Clamp
TRMS
AC /
ZERO
2 Sec
AMP-25
AMP-25
AMP-25-EUR
Mini-Clamp
User Manual
English
1/2015, 6004363 B
©2015 Amprobe®` Test Tools.
All rights reserved. Printed in Taiwan
Limited Warranty and Limitation of Liability
Your Amprobe product will be free from defects in material and workmanship for one year from the date of purchase unless local laws require otherwise. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on
the behalf of Amprobe. To obtain service during the warranty period, return the product with proof of purchase to an authorized Amprobe Service Center or to an Amprobe dealer or distributor. See Repair Section for details. THIS WARRANTY IS YOUR ONLY REMEDY. ALL OTHER WARRANTIES - WHETHER
EXPRESS, IMPLIED OR STATUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, ARE HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you.
Repair
All Amprobe returned for warranty or non-warranty repair or for calibration should be accompanied by the following: your name, company’s name, address, telephone number, and proof of purchase. Additionally, please include a brief description of the problem or the service requested and include the test leads with the meter. Non-warranty repair or replacement charges should be remitted in the form of a check, a money order, credit card with expiration date, or a purchase order made payable to Amprobe.
In-warranty Repairs and Replacement – All Countries
Please read the warranty statement and check your battery before requesting repair. During the warranty period, any defective test tool can be returned to your Amprobe distributor for an exchange for the same or like product. Please check the “Where to Buy” section on www.Amprobe.com for a list of distributors near you. Additionally, in the United States and Canada, in-warranty repair and replacement units can also be sent to an Amprobe Service Center (see address below).
Non-warranty Repairs and Replacement – United States and Canada
Non-warranty repairs in the United States and Canada should be sent to an Amprobe Service Center. Call Amprobe or inquire at your point of purchase for current repair and replacement rates.
USA: |
Canada: |
Amprobe |
Amprobe |
Everett, WA 98203 |
Mississauga, ON L4Z 1X9 |
Tel: 877-AMPROBE (267-7623) |
Tel: 905-890-7600 |
Non-warranty Repairs and Replacement – Europe
European non-warranty units can be replaced by your Amprobe distributor for a nominal charge. Please check the “Where to Buy” section on www.Amprobe.eu for a list of distributors near you.
Amprobe Europe* Beha-Amprobe
In den Engematten 14 79286 Glottertal, Germany Tel.: +49 (0) 7684 8009 - 0 www.Amprobe.eu
*(Correspondence only – no repair or replacement available from this address. European customers please contact your distributor.)
AMP-25 / AMP-25-EUR Mini-Clamp |
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CONTENTS |
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SYMBOL................................................................................ |
3 |
SAFETY INFORMATION........................................................ |
4 |
UNPACKING AND INSPECTION............................................ |
6 |
MEASUREMENTS................................................................. |
6 |
Measuring AC and DC Current....................................... |
8 |
DC A ZERO....................................................................... |
9 |
Low Pass Filter................................................................. |
9 |
Inrush Current................................................................. |
9 |
Non-Contact Voltage Detection..................................... |
10 |
Data Hold ........................................................................ |
11 |
Auto Power Off .............................................................. |
11 |
SPECIFICATIONS................................................................... |
12 |
ELECTRICAL SPECIFICATIONS ............................................. |
14 |
MAINTENANCE AND REPAIR............................................... |
15 |
BATTERY REPLACEMENT..................................................... |
16 |
AMP-25 / AMP-25-EUR Mini-Clamp
1
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2
TRMS
AC /
3 |
ZERO |
6 |
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2 Sec |
4
AMP-25
1Jaw
2Hand Guard
3Jaw Trigger
4LCD Display
5Indicator of the Jaw Center for Current Measurement
6Backlight / Flashlight & Function Buttons
16 15 14 13
7
8
9
12
10 |
11 |
7AUTO: Auto AC/DC current measurement mode active
8
Non-Contact Voltage mode active
9
Negative reading
10
Battery status indicator
11A: Amps
12
Alternating Current (AC)
Direct Current (DC)
13HOLD: Data hold
14LPF: Low Pass Filter mode active
15INRUSH: Inrush current mode active
16∆ Relative ZERO is active
Symbols
Application and removal from hazardous live conductors permitted
Caution! Risk of electric shock
WCaution!manual Refer to the explanation in this
TThe equipment is protected by double insulation or reinforced insulation
JEarth (Ground)
CAT III Overvoltage Category lll
BAlternating Current (AC)
3
FDirect Current (DC)
Battery
)Canadian Standards Association (NRTL/C)
PComplies with European Directives
Conforms to relevant Australian standards
=Do not dispose this product as unsorted municipal waste. Contact aqualified recycler
SAFETY INFORMATION
The Meter complies with:
•UL/IEC/EN 61010-1, CAN/CSA C22.2 No. 61010-1-12, Pollution Degree 2, Measurement Category III 600 V
•IEC/EN 61010-2-032, CAN/CSA-C22.2 No. 61010-2-032-12
•EMC IEC/EN 61326-1
Measurement Category III (CAT III) refers to measurements of hard-wired equipment in fixed installations, distribution boards, and circuit breakers. Also includes cables, bus bars, junction boxes, switches, socket outlets in the fixed installation, and stationary motors with permanent connections to fixed installations.
CENELEC Directives
The instruments conform to CENELEC Low-voltage directive 2006/95/EC and Electromagnetic compatibility directive 2004/108/EC.
Warning: Read Before Using
To avoid possible electric shock or personal injury:
•Use the Meter only as specified in this manual or the protection provided by the Meter might be impaired.
•Avoid working alone so assistance can be rendered.
•Do not use the Meter in wet or dirty environments.
4
•Do not use the Meter if it appears damaged. Inspect the Meter before use. Look for cracks or missing plastic. Pay particular attention to the insulation around the connectors.
•Have the Meter serviced only by qualified service personnel.
•Use extreme caution when working around bare conductors or bus bars. Contact with the conductor could result in electric shock.
•Do not hold the Meter anywhere beyond the tactile barrier.
•When measuring current, center the conductor in the clamp.
•Never operate the Meter with the battery cover removed or the case open.
•Never remove the battery cover or open the case of the Meter without first removing the jaws from a live conductor.
•Use caution when working with voltages above 30 V AC rms, 42 V AC peak, or 60 V DC. These voltages pose a shock hazard.
•Do not attempt to measure any voltage that might exceed the maximum range of the Meter.
•Use the proper function for your measurements.
•Do not operate the Meter around explosive gas, vapor, or dust.
•Use only 1.5 V LR44 batteries, properly installed in the Meter case, to power the Meter.
•To avoid false readings that can lead to electrical shock and injury, replace the battery as soon as the
low battery indicator ( 
) appears. Check Meter operation on a known source before and after use.
•When servicing, use only specified replacement parts.
•Adhere to local and national safety codes. Individual protective equipment must be used to prevent shock and arc blast injury where hazardous live conductors are exposed.
5
Unpacking and Inspection
Your shipping carton should include:
1Clamp meter
21.5 V LR44 batteries (installed)
1Carrying case
1User Manual
If any of these items are damaged or missing, return the complete package to the place of purchase for an exchange.
MEASUREMENTS
Warning
To avoid possible electric shock or personal injury:
•To avoid electric shock or personal injury:
•When measuring current, center the conductor in the clamp.
•Keep fingers behind Tactile Barrier.
•Use the proper function for measurements.
Button Description
Press 
button to turn ON the meter (the default is auto AC/DC A mode). Press > one second to turn OFF.
Press
OFF |
Press |
>1 Sec |
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Press 
button to turn ON or to turn OFF LCD backlight. The backlight automatically turns OFF after approximately 30 seconds.
Press
6
Press 
button to select AC A or DC A mode.
Press 
button > one second to return to
AUTO AC/DC A mode.
Press 
button to enter Low Pass Filter mode (LPF is displayed). Press a second time to enter Inrush mode (INRUSH is displayed). Press again to exit the function.
/ |
Press button to activate non-contact |
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voltage mode. Press a second time to exit |
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non-contact voltage mode. |
Press 
/ 
button > two seconds to clear DC A reading from the display (∆ is
displayed) and establish a baseline for DC A.
Press 
button > two seconds again to exit this mode.
Caution
1.ZERO mode can be activated in DC A and DC A of Auto DC/AC A mode only.
2.When ZERO is activated (symbol ∆ is displayed in DC A and Auto DC A mode only), the offset residual value will not be reset until the Meter is turned OFF.
3.ZERO can be activated if residual value < 6 A in DC A mode, < 6 A DC and <0.1 A AC in Auto DC/AC A mode.
HOLD Press HOLD button to freeze the display reading (HOLD is displayed) and releases the reading when pressed a second time.
Warning
To avoid possible electric shock or personal injury, when Display HOLD is activated, be aware that the display will not change when you apply a different current.
7
Measuring AC and DC Current
Warning
To avoid electrical shock and injury:
•Do not hold the Meter anywhere beyond the tactile barrier.
•Do not use the Meter to measure currents above the maximum rated frequency (400Hz). Circulating currents may cause the magnetic circuits of the Jaws reach hazardous excessive temperatures.
To measure AC or DC current:
1.Switch on the Meter by pressing 
button, the default is auto AC/DC A detection mode (AUTO is
displayed). Press 
button to choose AC A or DC A. The display reflects the chosen function mode.
2.Open the clamp by pressing the jaw release and insert the conductor to be measured into the clamp. Ensure the jaws are firmly closed.
3.Close the clamp and center the conductor using the jaw alignment marks.
4.View the current reading on the display.
Caution
During current measurement keep the jaws away from other current carrying devices such as transformers, motors or energized wires, as they may negatively influence accuracy of the measurement.
CAT III 600 V |
Auto |
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Tactile barrier |
Press |
Press |
Press > 1 Sec |
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8
DC A ZERO (DC A and Auto DC/AC A mode)
Press 
/ 
button > two second to clear DC A reading from the display and establish a baseline for DC A.
0A
Low Pass Filter
Press 
button to activate Low Pass Filter mode (“LPF” is displayed).
Press a second time , the Meter goes into Inrush mode (INRUSH is displayed). Press again to exit the function.
LPF
Press
100A/1KHz
Inrush Current
Press 
button to enter Low Pass Filter mode (LPF is displayed) first. Press a second time to enter Inrush mode (“INRUSH” is displayed). Press again to exit the function.
The Meter calculates the RMS value for 100ms when detecting a current above 5A.
9
INRUSH
Non-Contact Voltage Detection
1.Press 
button to activate non-contact voltage mode ( 
is displayed).
2.The voltage detection antenna is located along the top end of the stationary clamp jaw for detecting electric field surrounding energized conductors
3.Detected electric field signal strength is indicated by a series of bar-graph segments on the display and beeper. The stronger the electric field detected, the more bar-graph segments are displayed and more intense beep-sound is generated.
10
Data Hold
Press HOLD button to freeze the display reading (HOLD is displayed) and releases the reading when pressed a second time.
Warning
To avoid possible electric shock or personal injury, when Display HOLD is activated, be aware that the display will not change when you apply a different current.
Press HOLD 
HOLD
DC 100A |
0A |
HOLD
Note: During data hold, the display flashes if the measured signal is 50 counts larger than the display reading. The Meter cannot detect across the AC and DC current.
Auto Power Off
The Meter turns off if there is no button pushed operation for 20 minutes.
To turn the Meter back on, press 
button and release to restart the Meter. The Meter goes into default mode (auto AC/DC A) when the Meter is turned back ON.
11
Disable auto power off:
Press and hold 
button while pressing 
button. “RoFF” is displayed, then release 
and 
button. The
meter is turned ON and goes into default measurement function (auto AC/DC A).
The auto power off mode resumes back when the Meter is OFF and is turned ON again.
SPECIFICATIONS
Display |
6000 counts |
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Sensing |
True-RMS |
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Polarity |
Automatic |
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Over-Range |
“OL” or “-OL” |
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Display |
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Update Rate |
2 times per second nominal |
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Operating |
32 °F to 122 °F (0 °C to 50 °C) |
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Temperature |
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Relative |
Non-condensing, |
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32 °F to 86 °F (0 °C to 30 °C) ≤ 80%, |
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Humidity |
>86 °F to 104 °F (>30 °C to 40 °C) ≤ 75%, |
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>104 °F to 122 °F (>40 °C to 50 °C) ≤ 45% |
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Storage |
-4 °F to 140 °F (-20 °C to 60 °C), 0% to |
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Temperature |
80% R.H. (with battery removed) |
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Pollution |
2 |
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Degree |
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Operating |
≤ 2000 m |
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Altitude |
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Temperature |
nominal 0.2 x (specified accuracy)/ °C , |
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Coefficient |
<18°C, >28°C) |
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Transient |
6.0 kV (1.2/50 µs surge) |
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Protection |
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E.M.C. |
Meets IEC/EN 61326-1 |
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Safety |
IEC/EN 61010-1, IEC/EN 61010-2-032 |
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Compliance |
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Agency |
) P |
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Approval |
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Shock |
MIL-PRF-28800F for A class 2 instrument |
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Vibration |
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Drop-Proof |
4 feet (120 cm) |
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Power |
Two 1.5V LR44 size battery |
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Supply |
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Battery Life |
20 hours |
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Low Battery |
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Indication |
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Auto Power |
Idle for 20 minutes |
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Off |
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Dimension |
5.8 x 2.4x 1.3 in (147 x 60 x 32 mm) |
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(L x W x H) |
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Weight |
140 g (0.31 lb) |
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Jaw Opening |
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& Conductor |
0.98 in (25 mm) max. |
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Diameter |
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ELECTRICAL SPECIFICATIONS
Accuracy is given as ±(% of reading + counts of least significant digit) at 23°C ± 5°C,with relative humidity less than 80% R.H., AC A specifications are ac coupled, true R.M.S. The crest factor may be up to 3.0 as 4000 counts.
For non-sinusoidal waveforms, additional accuracy by Crest Factor (C.F.):
Add 3.0% for C.F. 1.0 ~ 2.0 Add 5.0% for C.F. 2.0 ~ 2.5 Add 7.0% for C.F. 2.5 ~ 3.0
Position Error of Clamp: ±1.5% of display reading
AC Current
Range |
60.00 A |
300.0 A |
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Resolution |
0.01 A |
0.1 A |
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Accuracy |
± (1.5 % + 25 LSD) |
± (1.5 % + 5 LSD) |
50 Hz to 100 Hz |
at < 3 A |
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± (1.5 % + 5 LSD) |
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at ≥ 3 A |
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Accuracy |
± (2.5 % + 25 LSD) |
± (2.5 % + 5 LSD) |
100 Hz to 400 Hz |
at < 3 A |
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± (2.5 % + 5 LSD) |
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at ≥ 3 A |
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Frequency Response: 50 to 400Hz (Sine Wave)
DC Current
Range |
60.00 A1) |
300.0 A |
Resolution |
0.01 A |
0.1 A |
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Accuracy |
± (1.5 % + 10 LSD)2) |
± (1.5 % + 5 LSD) |
1)There are less than 0.3A variations as measuring in different directions.
2)Add 10 LSD to accuracy in Auto AC / DC A mode.
14
Low Pass Filter
Range |
60.00 A |
300.0 A |
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Resolution |
0.01 A |
0.1 A |
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Accuracy |
± ( 3.5 % + 25 LSD) |
± (3.5 % + 5 LSD) |
50 Hz to 60 Hz |
at < 3 A |
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± (3.5 % + 5 LSD) |
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at ≥ 3 A |
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Cut-off Frequency (-3dB): Approx. 160 Hz
Attenuation Characteristic: Approx. -24 dB/Octave
Inrush Current
Range |
300.0 A |
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Resolution |
0.1 A |
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CIntegration Time: 100 ms
Trigger Current: 5.0 A
Non-Contact Voltage Detection
Voltage range: 80 V to 600 V, 50 Hz to 60 Hz Indication: bar-graph segments and audible beep tones proportional to the field strength
Detection frequency: 50/60 Hz
Detection antenna: inside the top side of the stationary jaw
MAINTENANCE AND REPAIR
If the Meter fails to operate, check battery, test leads, etc., and replace as necessary.
Double check the following:
1.Replace the fuse or battery if the meter does not work.
2.Review the operating instructions for possible mistakes in operating procedure.
15
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