| DC Clamp meter Model |
|
|
| PST-CM01 |
Clamp on multimeter
10 mA resolution |
$249
|
| PST-PR11 |
Clamp on multimeter 1 mA resolution |
$344
|
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.
Note and Warning:
Many clamp-on meters claim to measure DC current, but when you buy them the DC measurements are
made with leads, not the clamps. We have tested many clamp-on meters, and unfortunately the
cheaper ones on the market have been useless, or they only measure large DC currents, 100s of
amps, not much use for most engineering.
- 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
- Quality instruments, made in Taiwan
- Size: 182mm x 50mm x 35mm
|
| PST-CM01 200 Amp Max, 10 mA resolution |
|
Range |
Resolution |
Accuracy |
Remarks |
| DCA 0-40A (clamp) |
10mA |
+/- 1.0%
+/- 2dgts |
|
| DCA 0-150A (clamp) |
100mA |
+/- 1.0%
+/-2 dgts |
|
| DCA 150-200A (clamp) |
100mA |
-2.2%
+/- 2dgts |
|
| ACA 0-40A (clamp) |
10mA |
+/- 1.0%
+/- 3 dgts |
|
| ACA 0-150A (clamp) |
100mA |
+/- 1.0%
+/- 3 dgts |
|
| ACA 150-200A (clamp) |
100mA |
-2.2%
+/- 3dgts |
|
| DCV 0-400V (leads) |
0.1 V |
+/- 1.0%
+/- 2dgts |
|
| ACV 0-400V (leads) |
0.1 V |
+/- 1.0%
+/- 2 dgts |
|
| W0-400W(leads) |
0.1W |
+/- 1.0%
/-2dgts |
beep sounds 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 |
|
| DCA 0-30A
(clamp) |
10mA |
+/- 1.5%rdg
+/- 3dgts |
|
| 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 |
|
| ACV 0-400V
(leads) |
0.1V |
+/- 2.0%rdg
+/- 5dgts |
True RMS |
|
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 |
|
