Amprobe ACD-14 TRMS-PLUS Manual de usuario

INSTRUCTION MANUAL

ACD-14 TECH CLAMP

AMPROBE

Congratulations! Your new instrument has been crafted according to quality standards

and contains quality components and workmanship. It has been inspected for proper

operation of all of its functions and tested by qualified factory technicians according to

the long-established standards of AMPROBE.

1) SAFETY

This manual contains information and warnings that must be followed for operating the

instrument safely and maintaining the instrument in a safe operating condition. If the

instrument is used in a manner not specified by the manufacturer, the protection

provided by the instrument may be impaired.

This meter meets the requirements for double insulation to IEC61010-2-032(1994),

EN61010-2-032(1995), UL3111-2-032(1999): Category III 600 Volts ac and dc.

OVERVOLTAGE INSTALLATION CATEGORIES, PER IEC61010:

OVERVOLTAGE CATEGORY II: Equipment of OVERVOLTAGE CATEGORY II is

energy-consuming equipment to be supplied from the fixed installation.

Note – Examples include household, office, and laboratory appliances.

OVERVOLTAGE CATEGORY III: Equipment of OVERVOLTAGE CATEGORY III is

equipment in fixed installations.

Note – Examples include switches in the fixed installation and some equipment for

industrial use with permanent connection to the fixed installation.

OVERVOLTAGE CATEGORY IV: Equipment of OVERVOLTAGE CATEGORY IV is

for use at the origin of the installation. Note – Examples include electricity meters and

primary over-current protection equipment.

TERMS IN THIS MANUAL

WARNING:Identifies conditions and actions that could result in serious injury or

even death to the user.

CAUTION: Identifies conditions and actions that could cause damage or

malfunction in the instrument.

WARNING:

To reduce the risk of fire or electric shock, do not expose this product to rain or

moisture. The meter is intended only for indoor use.

To avoid electrical shock hazard, observe the proper safety precautions when working

with voltages above 60 VDC or 30 VAC rms. These voltage levels pose a potential

shock hazard to the user.

Inspect test leads, connectors, and probes for damaged insulation or exposed metal

before using the instrument. If any defects are found, replace them immediately.

Do not touch test lead tips or the circuit being tested while power is applied to the

circuit being measured. To avoid accidental short circuit of bare (un-insulated)

hazardous live conductors or bus bars, switch them off before insertion and removal of

the current clamp jaws. Contact with the conductor could result in electric shock.

Keep your hands/fingers behind the hand/finger barriers that indicate the limits of safe

access of the meter and the test leads during measurement.

CAUTION:

Disconnect the test leads from the test points before changing meter functions.

INTERNATIONAL ELECTRICAL SYMBOLS

Caution! Refer to the explanation in this Manual

Caution! Risk of electric shock

Earth (Ground)

Double Insulation or Reinforced insulation

Fuse

AC--Alternating Current

DC--Direct Current

2) CENELEC Directives

This instrument conforms to CENELEC Low-voltage directive 73/23/EEC and

Electromagnetic compatibility directive 89/336/EEC

3) PRODUCT DESCRIPTION

Note: Please refer to Specification Section for function details.

1) Clamp Jaw for AC current magnetic field

pick up

2) Hand/Finger Barrier to indicate the limits

of safe access of the meter during

measurement

3) Power ON/OFF buttons for ACA current

function and MAX/Hold features

4) Push-button for frequency selection

5) Input Jack for all functions EXCEPT

clamp-on ACA current function

6) Common (Ground reference) Input Jack

for all functions EXCEPT clamp-on ACA

current function

7) Slide-switch Selector to turn the lower

display ON/OFF and to Select functions

8) Lower Display: for Input Jack functions

3-3/4 digits 4000 counts LCD

9) Upper Display: for ACA current

Clamp-on

3-3/4 digits 4000 counts LCD

10) Jaw trigger for opening the ACA current

clamp jaw

4) OPERATION

DC Voltage, AC Voltage, Hz Frequency functions

Inputs are made through the test lead terminals. Move the slide-switch to the “V”

position. The unit defaults at DC voltage. Press SELECT button momentarily to select

AC voltage.

To activate the Hz Frequency function, press the Hz button momentarily.

Note: 400.0mV range is designed with 1000MΩhigh input impedance for least current

drain in measuring small signals, and can cope better with most commercially available

voltage output transducers/adapters. The non-zero display reading is normal when the

meter inputs are open circuit, which will not affect actual measurement accuracy. The

meter will show close to zero reading when the inputs are shorted. Open input is

actually a floating condition, which is not a zero-volt-input condition.

Note: Hz input sensitivity varies automatically with function range selected while

activating the Hz function. Lowest range has the highest sensitivity, and the highest

range has the lowest sensitivity. Activating the Hz function WHILE measuring the

specific function signal (auto ranging) can automatically select the best sensitivity

range to avoid electrical noise that may cause unstable Hz reading. However, if the Hz

reading shows zero due to insufficient sensitivity, activate the Hz function BEFORE

measuring the specific function signal. The meter is then in the lowest range and can

select the highest sensitivity range.

Caution

Measuring Resistance, Continuity, Diode or Capacitance function on a live circuit will

produce false results and may damage the instrument. In many cases the suspected

component must be disconnected from the circuit to obtain an accurate measurement

reading.

ΩResistance, and Continuity functions

Inputs are made through the test leads terminals. Move the slide-switch to the “Ω”

position. The unit defaults at Ω. Press SELECT button momentarily to select

Continuity function, which is convenient for checking wiring connections and operation

of switches. A continuous beep tone indicates a complete wire.

Diode test function

Inputs are made through the test lead terminals. Move the slide-switch to the “Ω”

position. The unit defaults at Ω. Press SELECT button momentarily 2 times to select

Diode test function.

Normal forward voltage drop (forward biased) for a good silicon diode is between

0.400V to 0.900V. A reading higher than that indicates a leaky diode (defective). A zero

reading indicates a shorted diode (defective).

An OL indicates an open diode (defective). Reverse the test leads connections

(reverse biased) across the diode. The digital display shows OL if the diode is good.

Any other readings indicate the diode is resistive or shorted (defective).

Capacitance function

Inputs are made through the test leads terminals. Move the slide-switch to the “Ω”

position. The unit defaults at Ω. Press SELECT button momentarily 3 times to select

Capacitance function.

CAUTION

Discharge capacitors before making any measurement. Large value capacitors should

be discharged through an appropriate resistance load.

ACA Current clamp-on function

Inputs are made through the clamp on jaws for non-invasive ACA current

measurements.

Press the OFF push button momentarily to power on and off the separate ACA

function (upper) display. The MAX HOLD push button can also be used to power on

this function. This twin ACA function display can be used simultaneously with voltage

measurements or any of the other slide-switch functions (lower display) or it can be

used alone.

CAUTION

Clamp the jaws around only one single conductor of a circuit for load current

measurement. Enclosing more than one conductor of a circuit will result in differential

current (like identifying leakage current) measurement.

Make sure the jaws are completely closed, or else it will introduce measurement

errors.

Strong Electro-magnetic field environments such as high-current transformers, motors

and conductors may affect measurement accuracy.

Temperature function

Insert the banana plug type-K temperature bead probe (TPK-59), observing the proper

polarities. Move the slide-switch to the “°F/°C” position. The unit defaults at

degree C (Celsius). Press SELECT button momentarily to select degree F

(Fahrenheit).

µA Current function

Inputs are made through the test leads terminals. Move the slide-switch to the “µA”

position. The unit defaults at DC. Press SELECT button momentarily to select AC.

You can select the Hz function by momentarily pressing the Hz button.

Application notes:

1) The DC

µA function is designed especially for HVAC/R flame sensor applications.

The 0.1µA resolution is useful for identifying the minute current changes in flame

detector applications. Flame signal current check should indicate steady flame

signal of at least 2µA for a rectification type, 1.5µA for an ultraviolet type, or 8µA

for self-checking systems. If a flame signal current with inadequate strength or

fluctuation beyond 10%, check the following to avoid the risk of unwanted flame

relay dropout:

1.1) For gas or oil flames (Minipeeper):

zLow supply voltage

zDetector location

zDefective detector wiring

zDirty viewing windows

zFaulty Minipeeper

1.2) For oil flames (Photocell):

zDetector location & wiring

zSmoky flame or poorly adjusted air shutter

zFaulty Photocell

zTemperature over 165°F (74°C) at photocell

1.3) For gas flames (Flame Rod):

zIgnition interference (A flame signal current difference with the ignition both on

and off greater than 0.5µA indicates the presence of ignition interference)

zInsufficient ground (must be at least 4 times the detector area)

zFlame lifting off burner head (ground), or not continuously in contact with the

flame rod

zTemperature in excess of 600°F (316°C) at the flame electrode insulator,

causing short to ground.

HOLD

The hold feature freezes the upper ACA display for later viewing. Press the HOLD

button momentarily to activate or exit this feature.

MAX

The Max feature compares and displays the measured maximum value (on the upper

ACA display) as fast as 25ms with auto-ranging capability. Press the MAX button for 1

second or more to activate or exit this feature.

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