Axio MET AX-C709 Manuale utente

AX-C709

1. Introduction

Warning

Read“Safety Information”before using the meter. ProcessMeter ( referred to as “the meter ”)is a handheld,

battery-operated tool for measuring electrical parameters. It has all the features of a digital multimeter, it

could also output signals of direct voltage, current and frequency as well.

If the meter is damaged or something is missing, contact the place of purchase immediately. Contact a

distributor for information about DMM (digital multimeter) accessories.

2. Safety Information

The meter complies with IEC61010.1-93 Overvoltage CategoryII.Use the meter only as specified in this

manual, otherwise the protection provided by the meter may be impaired. A Warning identifies conditions

and actions that pose hazard(s) to the user; a Caution identifies conditions and actions that may damage

the meter or the equipment under test; an Attention identifies symbols of the operation and explanations

of the features. International symbols used on the meter and in this manual are explained below.

Warning

To avoid possible electric shock or personal injury:

• Do not use the meter if it is damaged. Before using the meter, inspect the case. Look for cracks or

missing plastic. Pay particular attention to the insulation surrounding the connectors.

• Make sure the battery door is closed and latched before operating the meter.

• Remove test leads from the meter before opening the battery door.

• Inspect the test leads for damaged insulation or exposed metal. Check test leads before using the

meter.

• Do not use the meter if it operates abnormally. Protection may be impaired. When in doubt, have the

meter serviced.

• Do not operate the meter around explosive gas, vapor, or dust.

• Use only type AAA batteries, properly installed in the meter case to power the meter.

• When servicing the meter, use specified replacement parts.

• Use caution when working above 30V ac rms, 42V ac pk, or60V dc. Such voltages pose a shock hazard.

• When using the probes, keep fingers behind the finger guards on the probes.

• Connecting the common test lead before connecting the live test lead. When disconnecting test leads,

disconnect the live test lead first.

• Do not touch the charging connector when the test lead is connected.

Caution!

To avoid possible damage to meter or to equipment under test:

• Disconnect the power and discharge all high-voltage capacitors before testing resistance or continuity.

• Use the proper jacks, function, and range for the measurement or sourcing application.

International Electrical Symbols

AC Current

DC Current

AC or DC

Safety rules

Earth ground

Fuse

Double Insulated

Low Battery

CAT II - CAT11 Overvoltage (Installation) Category11, Pollution Degree 2 per IEC61010 refers to the level

of Impulse Withstand Voltage protection provided. Typical locations include: Plug and the connecting

electric

equipments, home appliance, convenient, tools, domestic plug, plugs 10m distant from type 3 circuit or

20m distant from type 4 circuit.

3. Measuring Electrical Parameters

The proper sequence for taking measurements follows:

1. Plug the test lead into the appropriate jacks

2. Set the rotary function switch to the desired function

3. Touch the probes to the test points

4. View the results on the LCD display

4. Input Impedance

For the voltage measurement functions, measuring impedance is 10 MΩ. See “Specifications” for more

information.

5. Ranges

A measurement range determines the highest value and resolution at which the meter can measure. Most

meter measurement functions have more than one range (see “Specifications”).

Make sure the correct range is selected:

- If the range is too low, the display shows OL (overload).

- If the range is too high, the meter will not be displaying its most precise measurement.

The meter normally selects the lowest range that will measure the applied input signal (<AUTO> showing

on the display). Press <RANGE> to lock the range. Each time <RANGE> is pressed, the meter selects the

next higher range for every press .At the highest range, it returns to the lowest range.

6. Testing Diodes

To test a single diode:

1. Insert the red test lead into the Hi (MEASURE) jack and black test lead into the COM jack.

2. Set the rotary function switch to Ω .

3. Press the blue button so that the symbol is on the display.

4. Touch the red probe to the anode and the black probe to the cathode (side with band or

bands).The meter should indicate the appropriate diode voltage drop.

5. Reverse the probes. The meter displays OL, indicating a high impedance.

6. The diode is good if it passes the tests in steps 4 and 5.

7. Using Display Hold

Warning

To avoid possible electric shock, do not use Hold to determine if dangerous voltage is present.

Activate Hold to freeze the meter’s display on each new stable reading. Press <HOLD> to activate Hold.

8. Using Relative Measuring Function

Press <REL> , the meter would show the present value in the sub-display district as a reference and the

relative value (minus between present value and referenced value) in the main-display district. For next

press <REL>, the meter would stop displaying the relative value.

Warning

In REL mode, be careful for possible dangerous voltage.

9. Measuring Frequency, Duty Cycle Ratio

Press <Hz> to show Frequency, Duty Cycle Ratio and Voltage (Current) in sequence when measuring

voltage (DC mV voltage excluded) and current.

10. Measuring TC

• Insert the one end of the test lead into the Hi (MEASURE) and COM jack and connect the other end to

the TC output.

• Set the rotary function switch to <mVTC>.

• Press the blue button and select TC measure function so that the corresponding unit and type of TC

are on the display.

• Press <RANGE> to select corresponding type of TC.

• Automatic compensation for reference-junction temperature.

User could start the automatic compensation for reference-junction temperature function in systematic

maintenance state (see “Power-Up Option” for information of entering into the systematic maintenance

state), the measured value is the temperature yielded by the compensation.

Where:

Displayed temperature = THERMAL EMF corresponding to the set temperature + Thermal EMF corre-

sponding to the room temperature

11. Measuring RTD

• Insert the one end of the test lead into the Hi (MEASURE) jack and COM jack and connect the other

end to the RTD output.

• Set the rotary function switch to <RTD> .

• Press the blue button and select RTD measure function so that the corresponding unit and type of RTD

are on the display.

• Press <RANGE> to select an appropriate type.

12. Output Function

The output terminal of the meter produces the simulating resistance, the simulating RTD, DC voltage, TC,

frequency and simulating transmitter set by the user.

Caution!

Using: Do not append voltage to the output jack; otherwise the internal circuit would be damaged for

impropriety.

13. Simulate Output of Resistance or RTD

Caution!

Resistance-simulation: The simulator produces the simulation resistance up to 400Ω at its output termi-

nal (Ohms/RTD). The method of simulating resistance output is to send out an appropriate voltage ‘VX’

according to the exciting current ‘IX’ produced by the calibrated instrument. Because R (set resistance)

=VX (output voltage)/IX (exciting current), the calibrated device must provide an exciting current to the

simulator. The exciting current should range from 0.5mA to 2mA.

Caution!

Resistance-simulation: A 4-wire system is designed for the re s i s t a n c e ou t p u t du r i n g th e calibration.

If the user adopts a two-wire system, he or she should take into consideration the error (ca.0.1Ω) arising

from the lead resistance of the test leads. If the capacitance between the resistance output terminal of the

simulator and the tested instrument is more than 0.1μf, the simulator will produce improper resistance.

• Insert one end of the test lead into the Hi (OUTPUT) jack and COM jack of the meter and connect the

other end to the input of the user’s instrument.

• Set the rotary function switch to <RTD> , and press the blue button to select resistance or RTD

function and displays unit ”Ω” or “°C” and the type of the RTD “Pt100”.

• Press <RANG> to select corresponding type in RTD function.

• Press <LEFT> or <RIGHT> to select the set digits for output.

• Press <DOWN> or <UP> to change the numerical value of the set digits. The value can do carry or

number decrement automatically. Hold the pressed key in one second and the value will keep varying.

• Press <HOLD> to turn on/off the output followed by displaying the symbol “ON” or “OFF”.

14. DC Voltage Output

• Insert one end of the test lead into the Hi (OUTPUT) jack and COM jack of the meter and connect the

other end to the input of the user’s instrument.

• Set the rotary function switch to TCmV (or V ), and press blue button to select mV (or V) function

and displays unit “mV” (or “V”).

• Press <LEFT> or <RIGHT> to select the set digits for output.

• Press <UP> or <DOWN> to change the numerical value of the set digits. The value can do carry or

number decrement automatically. Hold the pressed key in one second and the value will keep varying.

• Press <HOLD> to turn on/off the output followed by displaying the symbol “ON” or “OFF”.

15. Simulating output from thermocouple (TC)

• Insert one end of the test lead into the Hi (OUTPUT) jack and COM jack of the meter and connect the

other end to the input of the user’s instrument.

• Set the rotary function switch to TCmV, and press the blue button to select TC function and displays

unit “°C” and the type of “R”.

• Press <RANGE> to select an appropriate type.

• Press <LEFT> or <RIGHT> to select the set digits for output.

• Press <UP> or <DOWN> to change the numerical value of the set digits. The value can do carry or

number decrement automatically. Hold the pressed key in one second and the value will keep varying.

• Automatic compensation for reference-junction temperature. During the direct calibration of an

instrument with reference- junction temperature compensation, user could start the automatic

compensation for reference-junction temperature function in systematic maintenance state (see

“Power-Up Option” for information of entering into the systematic maintenance state), thus providing

the required thermo-electromotive force for output followed by displaying the symbol “RJ-ON”. Where:

Output Thermal EMF = Thermal EMF corresponding to the set temperature

–Thermal EMF corresponding to the room temperature. If there is no need for the Simulator to

perform the function of automatic reference-junction compensation, user could turn off the automatic

compensation for reference-junction temperature function in systematic maintenance state (see

“Power-Up Option” for information of entering into the systematic maintenance state), and“RJ-ON”

will not on display.

• Press <HOLD> to turn on/off the output followed by displaying the symbol “ON” or “OFF”.

16. Frequency Output

• Insert one end of the test lead into the Hi (OUTPUT) jack and COM jack of the meter and connect the

other end to the input of the user’s instrument.

• Set the rotary function switch to V , and press the blue button to select function and displays unit

“Hz” indicating frequency set.

• Press <LEFT> or <RIGHT> and or <UP> to <DOWN> select output frequency within 1-100Hz.

• Press <HOLD> and “ON” is on display, and begin output frequency signal.

• Press <RANGE> and displays unit “kHz”, and repeat the 3-4 step to output 0.1-1.1kHz (1.0 - 11.0kHz)

frequency signal.

17. Simulating Transmitter output (absorption current)

XMT refers to simulate a current loop circuit transmitter with the meter. Do this when you get external

dc voltage (5-28 V) or have current loop in series.

Caution!

Set the rotary button in one of the mA output before connecting the testing leads with current loop circuit.

Otherwise, low impedance from other parts of rotary will occur in the circuit and caused 35mA current in

circuit.

• Insert one end of the test lead into the Hi (OUTPUT) jack and COM jack of the meter and connect the

other end to the input of the user’s instrument.

• Set the rotary function switch to XMT, and external loop power is necessary, select XMT function and

displays “LOOP POWER” indicating XMT set.

• Other button operating is same as that described in direct current output.

Caution!

• Range of power supply:5-28VDC

• Using: During the operation at the current output, try your best to use an external 24VDC power

source in a mode of connection with a transmitter, thus being able to prolong the battery life.

18. DC current output

• Insert one end of the test lead into the Hi (OUTPUT) jack and COM jack of the meter and connect the

other end to the input of the user’s instrument.

• Set the rotary function switch to and displays unit “mA”.

• Press <REL> to select set value of manual waveform output, and display unit “mA”, “25%_set” (or

“100%_set”). Among them: 0%=4 mA, 100% =20 mA. In digital set output mode: press <LEFT> or

<RIGHT> to select the set digits for output; press <DOWN> or <UP> to change the numerical value of

the set digits. The value can do carry or number decrement automatically. Hold the pressed key in one

second and the value will keep varying. In 25% (or 100%) mode: press <DOWN> or <UP> to change

the set value. Press <HOLD> and “ON” is on display, and begin output current signal.

• Press <Hz> to select set value of auto waveform output, and displays unit “mA”, “M”. Press <HOLD>

to turn on/off the output followed by displaying the symbol “ON” or “OFF”. Press <RANGE> to start or

stop auto waveform output, in which “AUTO ”is on display .The present value will be held and enter

into digital set output mode when the mode is stopped.

19. Replacing the Batteries

Warning

To avoid electrical shock or personal injury:

• Remove test leads from the meter before opening the battery door.

• Close and latch the battery door before using the meter.

Note

• The new and old Batteries can not be mixed.

• Take out the batteries if the meter won’t be used for a long time.

• Dispose the old batteries in accordance with the local law.

Replace the batteries as follows:

• Remove the test leads and turn the meter OFF.

• Specific steps: take off the protector of the meter and then with a standard blade hand screwdriver,

turn each battery door screw counterclockwise so that the slot is parallel with the screw picture

molded into the case.

• Lift off the battery door.

• Remove the meter’s batteries.

• Replace with four new AAA alkaline batteries.

• Reinstall the battery door and tighten screws.

• Install the protector.

Caution!

Make sure the battery’s odes are in accordance with the symbols illustrated in battery pool when replacing

them.

20. Replacing a Fuse

Warning

To avoid personnel injury or damage to the meter, use only the specified replacement fuse. F1 the specifi-

cation is 63mA 250V and F2 is 0.5A 250V, which are fast-melt.

0.5A 250V-fuse (F2) protection is in the current input jack, while 63mA 250V-fuse (F1) protection is in the

current output jack. To check whether fuses are blown:

• Turn the rotary function switch to mA.

• Plug the black test into COM, and the red test lead into the mA jack.

• Using an ohmmeter, check the resistance between the meter test leads .If the resistance is about 1Ω,

the fuse is good. An open reading means that fuse F2 is blown.

• Fuse F1 is blown if the outputs do not alter with the change of the fixed value, and replace it as follows:

1. Remove the test leads from the meter and turn the meter OFF.

2. With a standard blade hand screwdriver, turn each battery door screw counterclockwise so that the

slot is parallel with the screw picture molded into the case.

3. Replace the blown fuse(s).

4. Reinstall the meter.

21. Technical specifications

21.1.

All the speculations apply to +18℃to +28℃, 10% to 70%RH unless stated otherwise. All speculations

assume a 5- minute warm- up period. Standard speculation is valid for one year.

Note

“Counts” refers to the number of increments or decrements of the least significant digit.

21.2. DC voltage measurement

1 - Range

2- Resolution

3 - Accuracy

Measuring Impedance:10 MΩ(nominal),<100pF

Common mode rejection ratio: 50Hz or 60Hz > 100dB

Normal mode rejection ratio: 50Hz or 60Hz > 45dB

Overvoltage protection: 600Vp-p

21.3. DC mV Measurement

1 - Range

2- Resolution

3 - Accuracy

Measuring Impedance: 10 MΩ(nominal)

Overvoltage protection: 600Vp

21.4. TC Measurement

1 - Range

2 - Set Range

3 - Resolution

4 - Accuracy

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