Axio MET AX-C708 User manual

AX-C708
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. Output Function
The output terminal of the meter produces DC voltage, frequency, current 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.
11. 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”.
12. 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.

13. 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.
14. 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.

15. Power-up Options
To select a power–up option, hold down the blue pushbutton while pressing <POWER> to turn on the
meter, then the meter enters into maintenance state.
In maintenance state, the sub-display screen displays option, and the main-display screen displays
the default value. Press blue pushbutton to alter the option. Press <RANGE> to store the set value
(“SAVE” is displayed, that indicates the option saved).
Turn off the power to exit.
Power-on Options
• APOF - Auto power-off
Function - Range: 0-60 minutes, +10 minutes each time; 0 value indicates canceling the auto power-off
function; press <DOWN> or <UP> to change the value.
Default - 10 min.
• BLOF - Lighting time for backlight
Function - Range: 0-9000 seconds; +30 seconds each time; 0 value indicates canceling the auto light-off
function; press <DOWN> or <UP> to change the value.
Default - 30 seconds.
• FCTY - Return to default value
Press and “SAVE” is on main-display, indicating returning to default.
16. 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.
17. 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.
18. Technical specifications
18.1.
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.

18.2. 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
18.3. DC mV Measurement
1 - Range
2- Resolution
3 - Accuracy
Measuring Impedance: 10 MΩ(nominal)
Overvoltage protection: 600Vp-p

18.4. AC Voltage Measurement
1 - Range
2- Resolution
3 - Accuracy
Specifications are valid from 5% to 100% of amplitude range 400mV is only confined to manual range
AC conversion: average value
Measuring Impedance: 10 MΩ(nominal),<100pF
Common mode rejection ratio: 50Hz or 60Hz > 100dB
Overvoltage protection: 600Vp-p
18.5. DC current measurement
1 - Range
2- Resolution
3 - Accuracy
Overload protection: 0.5A,250V fast-blow fuse
Measuring Impedance: 1Ω

18.6. AC current measurement
1 - Range
2- Resolution
3 - Accuracy
Specifications are valid from 5% to 100% of amplitude range
Overload protection: 0.5A,250V fast-blow fuse
Measuring Impedance: 1Ω
18.7. Resistance measurement
1 - Range
2- Resolution
3 - Accuracy
Open circuit voltage:0.4v
Guide lead resistance is excluded in the accuracy
Overvoltage protection: 600Vp-p