Pintek PA-655 Manuale utente
安培 交流/直流 電流探測鉗
DC‐500KHz.5mA‐50A
INSTRUCTION MANUAL
50 Amp AC/DC Current Probe
PA-655
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TABLEOFCONTENTS
General Safety Instructions-------------------------------------------------4
Safety Terms and Symbols--------------------------------------------------5
Getting Started------------------------------------------------------------------6
Basic Operation-----------------------------------------------------------------8
Maintenance--------------------------------------------------------------------10
Specifications------------------------------------------------------------------13
Replaceable Parts-------------------------------------------------------------19
Accessories---------------------------------------------------------------------
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PA-655
50 Amp AC/DC Current Probe
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General Safety Instructions:
Read the following safety instructions to avoid injury and prevent damage
to this product or any products connected to it. Use this product only as
specified.
Only qualified personnel should perform service procedures.
ToAvoidFireorPersonalInjury
ConnectandDisconnectProperly.Connect the probe output to the
measurement instrument before connecting the probe to the circuit under
test. Disconnect the probe input and the probe ground from the circuit
under test before disconnecting the probe from the measurement
instrument.
ObserveAllTerminalRatings.To avoid fire or shock hazard, observe
all rating and markings on the product. Consult the instruction manual for
further ratings information before making connections to the product.
ReplaceBatteriesProperly.Replace batteries only with the proper
type and rating specified.
DoNotOperateWithoutCovers.Do not operate this product without
the covers or panels.
AvoidExposedCircuitry. Do not touch exposed connections and
components when power is present.
DoNotOperateWithSuspectedFailures.If you suspect there is
damage to this product, have it inspected by qualified service personnel.
DoNotOperateinWet/DampConditions.
DoNotOperateinanExplosiveAtmosphere.
KeepProductSurfacesCleanandDry.
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Safety Terms and Symbols:
Terms in This Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices
that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices
that could result in damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the marking.
WARNING indicates an injury hazard not immediately accessible as you
read the marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. These symbols may appear on the product:
Attention refer to operation Instructions.
This instrument has double insulation.
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Getting Started:
The PA-655 current probe enables a general purpose oscilloscope to
display AC and DC current signals up to 100 amps Peak (35A RMS). The
PA-655 current probe can also make AC and DC measurements with a
multimeter by using the recommended accessory MT-246N
(BNC-to-banana) plug adapter.
Figure 1: shows the controls and indicators on the PA-655 current probe.
Press Button
Battery Inside
(suggested outdoor using)
Max. 11∅Wire
DC Zero OffsetRange Selection
(Power On/Off)
Out
p
ut Into BP-250
A
CAda
p
tor In
p
ut
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Table 1: PA-655 controls and indicators
Control/Indicator Description
Current flow symbol. The arrow shows the probe’s
polarity convention for measuring current flowing
from positive to negative.
Zero adjustment. Rotate to adjust the probe output
to zero when there is no current present. It may also
be used to offset a DC signal component. Zeroing is
not needed for AC measurements unless your
instrument cannot isolate a DC component (if
present).
OFF/Range switch. Slide the switch from OFF to
either the 20 mV/A or 200mV/A range. When either
range is selected, the probe is turned on, and the
green battery indicator lights. If the indicator does not
light, see Battery Notes and Battery Installation on
page11.
Battery indicator. The green battery indicator lights
when the probe is turned on. For more information,
see Battery Notes and Battery Installation on page11.
Overload indicator. The red overload indicator lights
if the measured signal is greater than the selected
range capacity. Switch the probe to 20 mV/A if
possible, or remove the probe from the circuit.
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Basic Operation:
Before using the probe, the batteries or specified power adaptor must be
installed. See the battery installation instructions on page11.
WARNING!
Do not clamp the probe onto circuits with voltages greater than 600
VAC. Personal injury or damage to the probe may result.
Always connect the PA-655 current probe output to the instrument
before clamping onto the circuit under test.
1. First connect the current probe BNC connector to BP-250 (double BNC
connection cable) then connect to oscilloscope input. Start by setting the
oscilloscope voltage input channel to DC volts, and the voltage sensitivity
scale to 0.1 V/div.
2. Move the OFF/ Range switch to the 20 mV/A or 200 mV/A position to
turn on the probe.
(※The PA-655 current probe has a green LED power/battery indicator. If
the LED does not light, replace the battery or use specified power
adaptor.)
3. Use the ZERO adjustment to zero or offset the probe output detection of
residual magnetic DC charges.
4. Connect the probe to the circuit by opening the jaws and clamping
around the conductor. See Figure 2.
NOTE. Clamping around both the “hot” and neutral wires may give
you a zero reading.
(Remember to unclamp the probe from the conductor before
disconnecting it from your meter or instrument).
Figure 2: Connecting the PA-655 current probe.
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5. Adjust the probe channel and oscilloscope’s time base as necessary to
get a clear and stable view of the signal. Set the oscilloscope input to DC
volts to see both the AC and DC currents; set the channel to AC to see
the AC current only.
The current drawn by different devices look much different than that of
others. While the RMS current can only be used in low frequency current,
the momentary peaks may be quite high. Figure 3 shows the difference
between the line current drawn by a resistive load and a motor controller.
Figure 3: Typical current waveforms
Congratulations on your purchase of the PA-655, a multifunctional current
probe. When connecting to a digital meter, use the recommended
MT-246N (BNC-to-banana adapter). Connect the black lead to the meter
COM (black letters on the meter), and the red lead to the VΩinput (red
letters on the meter).
To measure only AC current, set the meter to measure AC volts.
To measure DC current, set the meter to measure DC volts. Note the
current convention arrow on the probe to get the proper polarity reading.
To increase the measurement sensitivity of the PA-655 current probe, loop
additional turns of the wire under test through the jaws. See Figure 4. The
sensitivity of the PA-655 current probe is multiplied times the number of
loops in the jaws. For example: 200 mV/A X 4 turns = 800 mV/A.
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Figure 4: Increasing the sensitivity
Maintenance:
Use the information in this section to properly maintain the operation of
your PA-655 AC/DC Current Probe.
1. Notes on Battery and Power Converter:
The PA-655 current probe uses a single square 9 V battery. This machine
is a high power product. Please use the specified alkaline battery.
As the battery in the PA-655 current probe is drained, significant gain
errors may occur. The green LED will continue to light until a low battery
voltage of 6.5 V is reached.
If probe gain errors are detected, replace the battery with a fresh one.
As an alternative, an AC power converter can be used to avoid gain error
due to poor battery durability. Switch to a square 9V battery only when
there is no AC power supply available outdoors.
When using an AC power converter for an extended time, we suggest you
remove the battery from the compartment. This is because heating will
result in battery leakage, and battery electrolyte will rust the circuit board,
thus creating major damage. Furthermore, batteries are high pollution
products and therefore by reducing their usage, we will in turn protect the
environment.
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