background image

 

12 

COM

A

V

mA

uA

A

mA

uA

OFF

  

E

F

VO

LT

A

UT

O   

            S

CA

N

COM

A

V

mA

uA

A

mA

uA

OFF

  

EF

VO

LT

A

U

TO

               S

CA

N

COM

A

V

mA

uA

A

mA

uA

OFF

  

EF

VO

LT

A

UT

O     

 

         SC

AN

3.2.2.

 

Non-contact electric field detector (EF mode) 

It should be a long-distance In measuring high-voltage. Pay attention to safety

 

 

Electric field is a special substance exist in the charge and the variable ambient 
magnetic field. 
To detector Non-contact electric field (set up and connect the Meter as shown in 
Figure 3-2): 
1)

 

Set the rotary switch to the position of EF/VOLT. 

2)

 

Press SELECT key to select non-contact electric field detector mode. When no or 

less electric field is detected, the LCD shows “EF” 
3)

 

Make the detector in the top of the meter approach to the wire. If the detector 

senses electric field, the strength will be showed on LCD by “-“ not digits type.  
And the buzzer will sound. Level 1 (weak) is “-“ and the level 4 (strong) is “----“. 
The buzzer frequency depends on the strength of electric field also. The faster 
beeper means the stronger electric field (ac voltage) is sensed. 
 
Note: 
Detection Sensibility: >36V ac rms 
Detection distance: <10cm, It’s related to the source value.

  

 

 

Figure 3 - Non-contact electric field detector 

3.2.3.

 

Resistance measurement 

To avoid electrical shock and/or damage to the instrument, disconnect circuit power and 

discharge all high-voltage capacitors before measuring resistance.

 

 
Resistance is an opposition to current flow. The unit of resistance is the ohm (

). The Meter 

measures resistance by sending a small current through the circuit. Because this current flows 
through all possible path between the probes, an in-circuit resistance reading represents the total 
resistance of all paths between the probes. 
To measure resistance ( set up the Meter as shown in figure 3-3): 

1)

 

Set the rotary switch to 

 range 

2)

 

Select auto scan or press SELECT key to select resistance measuring 

mode. 
3)

 

Connect the black and red leads to the COM and V

 

terminals 

respectively

.

 

4)

 

Connect the test leads to the circuit being measured. 

5)

 

Read the displayed value. 

 

Figure 3-3 

Measuring Resistance 

Note: 
In case of performing resistance test on circuit board, it is necessary firstly to turn off power of the 
circuit board and then perform the measurement. As there may be other parallel circuits, so the 
displayed value of test is not surely the actual value of the resistor. 

Summary of Contents for AX-174

Page 1: ...AX 174 INSTRUCTION...

Page 2: ...D Display 8 2 3 Key pad 9 3 FUNCTION DESCRIPTION 9 3 1 general Functions 9 3 1 1 Auto scan mode 9 3 1 2 DATA HOLD mode 10 3 1 3 Manual ranging and Auto range mode 10 3 1 4 True RMS measurement 11 3 1...

Page 3: ...ifications 15 4 2 Measurement specifications 15 4 2 1 AC Voltage 16 4 2 2 DC Voltage 16 4 2 3 Resistance 16 4 2 4 Continuity Check 16 4 2 5 Diode Test 16 4 2 6 Capacitance 17 4 2 7 Current 17 4 2 8 Li...

Page 4: ...e low energy source derived from a highwinding resistance transformer such as the high voltage section of a copier CAT II Single phase receptacle connected loads Applience portale tools and Rother hou...

Page 5: ...using probes keep your fingers behind the finger guards When making connections connect the common test lead before connecting the live test lead when disconnecting disconnect the live test lead befo...

Page 6: ...carried out on the meter while it is live should be carried out only by appropriately qualified personnel after having taken into account the instructions in this present manual A qualified person is...

Page 7: ...ults and various symbols 2 Keypad Measurement function keys 3 Rotary switch Used for selecting measurement functions 4 Terminal receiving the red test lead for voltage resistance capacitance diode and...

Page 8: ...selects the range with the best resolution 8 MANU The meter is in the Manual Range mode in which the user selects the range 9 HOLD When HOLD functon is enabled When delay hold is selected the HOLD sy...

Page 9: ...st for 2 seconds the meter will delay for 6 seconds than enters HOLD mode 2 3 4 Hz During the voltage or current measurement by pressing Hz key the meter will enter the linear frequency measurement st...

Page 10: ...ill delay for 6 seconds that enters HOLD mode 3 1 3 Manual ranging and Auto range mode The Meter has both manual ranging and auto range options In the auto range mode the Meter selects the best range...

Page 11: ...attempt to take any voltage measurement that might exceeds 1000Vdc or 1000Vac rms To avoid electrical shock and or damage to the instrument do not apply more than 1000Vdc or 1000Vac rms between that...

Page 12: ...rms Detection distance 10cm It s related to the source value Figure 3 Non contact electric field detector 3 2 3 Resistance measurement To avoid electrical shock and or damage to the instrument disconn...

Page 13: ...ntinuous beeping will indicate it Figure 3 4 Checking the Continuity 3 2 5 Diode Test To avoid electrical shock and or damage to the instrument disconnect circuit Power and discharge all high voltage...

Page 14: ...uto scan mode or press the SELECT key to activate capacitance measuring mode 3 Connect the black and red test leads to the COM and terminals respectively 4 Connect the test leads to the capacitor bein...

Page 15: ...0V CAT III and 600V CAT IV Pollution degree 2 Altitude 2000m Operating temperature 0 40 C 32 F 122 F 80 RH 10 C non condensing Storage temperature 10 60 C 14 F 140 F 70 RH battery removed Temperature...

Page 16: ...that will not affect the accuracy of measurement 4 2 2 DC Voltage DCV Range Resolution Accuracy 600mV 0 1mV 0 5 5 6V 1mV 0 8 5 60V 10mV 0 8 5 600V 100mV 0 8 5 1000V 1V 1 0 2 4 2 3 Resistance Range Re...

Page 17: ...olution Accuracy 600 A 0 1 A 1 5 5 6000 A 1 A 60mA 0 01mA 1 8 8 600mA 0 1mA 10A 10mA 2 8 Above accuracies can be guaranteed within 5 100 of the full range The true RMS meter has residual value within...

Page 18: ...dings To clean the terminals Turn the meter off and remove all test leads Shake out any dirt that may be in the terminals Soak a new swab with a cleaning and oiling agent such as WD 40 Work the swab a...

Page 19: ...e input terminals 1 Set rotary switch to the OFF position 2 Disconnect test leads and or any connectors from the terminals 3 Use a screwdriver to unlock the two screws on the battery cover 4 Take out...

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