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Digital DC Clamp on Ammeters |
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| DC Clamp meter Model |
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| PST-CM01 |
Clamp on multimeter
10 mA
resolution |
$254
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| PST-PR11 |
Clamp on multimeter 1 mA resolution |
$386
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This is a very handy tool for engineers working with
batteries, power supplies, chargers, electric bicycles and vehicles. You just clamp the sensor
over one of the current carrying wires and read the amps. No need to break the circuit because
it is contactless. It is much safer than using an ammeter that is inserted in-line less
disturbing to the circuit, and much more convenient.
Theory of operation: To do a
contactless measurement with the clamp ring this ammeter uses a hall effect device to measure
the axial magnetic field generated in the wire by current flowing through it. The clamp
surrounds the wire, which is creating a magnetic field around it according to Ampere's Law. The
magnetic field is concentrated by an iron core contained in the clamp. The magnetic field is
sensed at an air gap that contains a semiconductor hall effect detector. Current flowing
through the silicon chip is deflected by the magnetic field creating a voltage perpendicular to
the direction of electron flow. This voltage is detected and converted to amps by the internal
microprocessor and displayed on the LCD panel.
The direction of the magnetic field
depends on the direction of current flow in the wire and is indicated by the plus and minus
ampere readings. An arrown in the clamp ring indicates the polarity.
These clamp-on DC
reading ammeters are very hard to find, usually digital clamp-on ammeters are AC only. Since
they are so useful in the power supply and battery industries we hunted these down and can
offer them at a very affordable price.
As an added bonus these also can measure AC
current through the clamp, as well as AC and DC voltage and continuity check through test
leads. This is an essential instrument for auto shops, electronics labs, bicycle shops, product
development labs, wheelchair technicians and everyone who needs to know how many amps is
flowing in a wire. They are good for working in crowded switch box, panels, and wire
harnesses.
We have two models. The PST-CM01 has a maximum current reading of 200
amps and a resolution of 10 mA. The PST-PR11 has a maximum current reading of 30 amps and an
incredible resolutin of 1 mA for DC and 0.1 mA for AC measurements.
- 3-3/4 digit large LCD display providing
4000 count with symbols
- Clamp current test up to 200 Amps DC or 30
Amps DC (or AC)
- Additional voltage, resistance, frequency
continuity check features on the PST-CM01 using leads
- Additional voltage feature on the PST-PR11
using leads
- DC Amps zero adjust function
- Low Battery Indicator
- 23 mm Large Jaw Diameter
- Data Hold and Auto-Off Functions
- Size: 182mm x 50mm x 35mm
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| PST-CM01 200 Amp Max, 10 mA resolution |
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Range |
Resolution |
Accuracy |
Remarks |
| DCA 0-40A
(clamp) |
10mA |
+/- 1.0%
+/- 2dgts |
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| DCA 0-150A
(clamp) |
100mA |
+/- 1.0%
+/-2 dgts |
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| DCA 150-200A
(clamp) |
100mA |
-2.2%
+/- 2dgts |
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| ACA 0-40A
(clamp) |
10mA |
+/- 1.0%
+/- 3 dgts |
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| ACA 0-150A
(clamp) |
100mA |
+/- 1.0%
+/- 3 dgts |
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| ACA 150-200A
(clamp) |
100mA |
-2.2%
+/- 3dgts |
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| DCV 0-400V
(leads) |
0.1 V |
+/- 1.0%
+/- 2dgts |
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| ACV 0-400V
(leads) |
0.1 V |
+/- 1.0%
+/- 2 dgts |
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| W0-400W(leads) |
0.1W |
+/- 1.0%
/-2dgts |
beep if < 40W
(Approx.) |
| Hz 0-1000KHz
(leads) |
0.1-100 |
+/- 0.5%
+/- 2dgts |
1V sensitivity Auto Range |
| PST-PR11 40 Amp Max, 1 mA resolution |
| Range |
Output |
Accuracy |
| DCA 0-4000mA (clamp) |
1mA |
+/- 1.5%rdg
+/- 5dgts |
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| DCA 0-30A (clamp) |
10mA |
+/- 1.5%rdg
+/- 3dgts |
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| ACA 0-400mA (clamp) |
0.1mA |
+/- 1.5%rdg
+/- 5dgts |
True RMS |
| ACA 0-4000mA (clamp) |
1mA |
+/- 1.5%rdg
+/- 8dgts |
True RMS |
| ACA 0-30A (clamp) |
10mA |
+/- 2.0%rdg
+/- 5dgts |
True RMS |
| DCV 0-400V (leads) |
0.1V |
+/- 1.0%rdg
+/- 3dgts |
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| ACV 0-400V (leads) |
0.1V |
+/- 2.0%rdg
+/- 5dgts |
True RMS |
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Power
Source:
2 X 1.5V AA UM3 Batteries
Current Consumption: 10mA
Operating Condition:
-10oC
to 50oC at 85% max. RH Agency
Approvals:cUL EN61010-2-032, CE CAT II 600V, CAT III 300V |
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PowerStream Technologies:
1163 S. 1680 West. Orem Utah 84058
Phone: 801-764-9060
Fax: 801-764-9061
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© Copyright 2000, 2002, 2003, 2004, 2006, 2007,
2010, 2011 Lund Instrument Engineering, Inc. All rights reserved |
Clamp-on ampmeter
AC/DC ammeter, AC-DC ampmeter, contactless ammeter |
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