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12 

BATTERY and FUSE replacement 

WARNING:

 To avoid electric shock, disconnect the test leads from any source of voltage before 

removing the battery door.

 

1.

 

When the batteries become exhausted or drop below the operating voltage, the battery warning 

symbol will appear in the LCD display. The battery should be replaced. 

2.

 

Follow instructions for installing battery. See the Battery Installation section of this manual. 

3.

 

Dispose of the old battery properly. 

 

WARNING:

 To avoid electric shock, do not operate your meter with the battery cover removed.

 

 
BATTERY INSTALLATION 

WARNING

: To avoid electric shock, disconnect the test leads from any source of voltage before 

removing the battery cover. 

Do not operate the instrument with the battery cover removed 

1.

 

Disconnect the test leads from the meter. 

2.

 

Open the battery cover by loosening the screw using a Phillips head screwdriver. 

3.

 

Insert the battery into battery holder, observing the correct polarity. 

4.

 

Put the battery cover back in place. Secure with the two screws. 

NOTE:

 If your meter does not work properly, check the fuses and battery to make sure that they are 

still good and that they are properly inserted. 

REPLACING THE FUSE 

WARNING

: To avoid electric shock, disconnect the test leads from any source of voltage before 

removing the fuse /battery cover. 

1. Disconnect the test leads from the meter and any item under test. 

2. Open the fuse door by loosening the screw on the door using a Phillips head screwdriver. 

3. Remove the old fuse from its holder by gently pulling it out.  

4. Install the new fuse into the holder. 

5. Always use a fuse of the proper size and value (0.5A/1000V fast blow for the 400mA range, 
10A/1000V fast blow for the 10A range). 

6. Put the fuse door back in place. Insert the screw and tighten it securely. 

WARNING

: To avoid electric shock, do not operate your meter until the fuse door is in place and 

fastened securely. 

Summary of Contents for AX-155

Page 1: ...TRUE RMS AUTORANGING DIGITAL MULTIMETER Model AX 155 INSTRUCTION MANUAL...

Page 2: ...ies recommend the use of fused test leads when measuring voltage on high energy systems Replacement fuses must be of the correct type and rating The instrument must not be used if any part of it is da...

Page 3: ...turn the range knob from the OFF position to any measurement range Note For best battery life ALWAYS turn the function switch to the OFF position when the meter is not in use This meter has Auto OFF...

Page 4: ...o normal AUTO measurement mode hold down the MAX MIN button for 2 seconds Peak Hold button The Peak Hold function captures the peak AC or DC voltage or current The meter can capture negative or positi...

Page 5: ...g into the negative COM jack 2 For current measurements up to 4000uA DC set the function switch to the uA position and insert the red test lead banana plug into the uA jack 3 For current measurements...

Page 6: ...til appears in the display 4 Touch the test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with...

Page 7: ...citance measurement time can be several minutes before the final reading stabilizes The bar graph is disabled in capacitance measurement mode The LCD displays DIS C Discharging through the chip is qui...

Page 8: ...value Average responding multimeters are calibrated to read correctly only on sine waves and they will read inaccurately on non sine wave or distorted signals True rms meters read accurately on either...

Page 9: ...0mV 0 1mV 0 8 of rdg 3 digits 4 000V 1mV 40 00V 10mV 400 0V 100mV 1000V 1V 1 2 of rdg 5 digits Input Impedance 7 8M AC Response True RMS 50 Hz 60Hz Maximum Input 1000V dc or 1000V ac rms DC Current A...

Page 10: ...rms on mA 10A ac rms on 10A range Resistance Auto ranging Range Resolution Accuracy 400 0 0 1 0 8 of rdg 5 digits 4 000k 1 0 8 of rdg 2 digits 40 00k 10 400 0k 100 4 000M 1k 2 5 of rdg 8digits 40 00M...

Page 11: ...Resolution Accuracy 20 o C 760 o C 1 o C 3 of rdg 5dgts 4 o F 1400 o F 1 o F 3 of rdg 9dgts Sensor Type K Thermocouple Overload protection 1000V dc or ac rms Diode Test Test current Resolution Accurac...

Page 12: ...sing a Phillips head screwdriver 3 Insert the battery into battery holder observing the correct polarity 4 Put the battery cover back in place Secure with the two screws NOTE If your meter does not wo...

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