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9

VI. MAINTENANCE 

A. Replacing the Battery

 (See Figure 12)

To replace the battery:

1. Turn the Meter”s power off and remove all connections from the terminals.
2.  Remove the screw from the tilt stand/battery compartment and  

separate the battery compartment and the tilt stand from the case bottom.

3. Remove the battery from the battery compartment.
4. Replace the battery with a new 9V battery (attached to the tilt stand).
5.  Rejoin the tilt stand/battery compartment with the case bottom and  

reinstall the screw.

B. Testing the Meters Fuse

 (See Figure 13)

To test the meter’s fuse connect the Meter as follows:

1. Insert the red test lead into the V input terminal.
2.  Set the rotary switch to 

Ω

 resistance measurement (

Ω

) is default or press the 

SELECT button to select 

Ω

 measurement mode. 

3.  Insert the other end of the test lead into the 10AMAX and observe the reading on 

the display. You should see a reading <0.5 Ohms. If you see (OL), the fuse is bad. 

4. Repeat step (4.) for the mA / μA terminal.
NOTE: 

•  When the fuse test has been completed, disconnect the connection between the 

testing leads and the circuit under test, and remove the testing leads from the input 

terminals of the Meter.

C. Replacing the Fuses

 (See Figure 13)

To replace the meter’s fuse:

1. Turn the Meter power off and remove all the connections from the terminals.
2.  Remove the screw from the tilt stand/battery compartment and separate  

the battery from the case bottom.

3.  Remove the two screws from the case bottom, and separate the case top from the case bottom.
4.  Remove the fuse by gently prying one end loose, then take out the fuse from its bracket.
5.  Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed firmly in the 

bracket. 

mA / μA range: F1, 600mA H 1000V, Ø6.35x31.8mm 

10A range: F2, 10A H 1000V, Ø10.3 x 38.1 mm

6. Rejoin the case bottom and case top, and reinstall the screw.
7. Rejoin the tilt stand/battery compartment and case bottom, and reinstall the screw.

Figure 12

Figure 13

NON-CONTACT VOLTAGE DETECTION

RANGE

RESOLUTION ACCURACY

50VAC

50Hz/60Hz

0mm: buzzer beep (insulated wire)

120VAC

0-5mm: buzzer beep (electric outlet)

500VAC

<12in: buzzer beep

Summary of Contents for DM6650T

Page 1: ...ave AC DC Voltage Capacitance Test AC Alternating Current Hz Frequency and Duty Cycle Test DC Direct Current mA Millamp Ohm Resistance A Amp Diode Test NCV Non Contact Voltage Sensing Continuity Test...

Page 2: ...g mode OL The input value is too large for the selected range Test of diode The continuity buzzer is on Maximum and Minimum reading The battery is low Warning To avoid false readings which could lead...

Page 3: ...may cause sparking which can lead to an explosion Never use the instrument if its surface or your hand is wet Do not exceed the maximum allowable input of any measuring range Never open the battery co...

Page 4: ...rect current AC DC Selectable Alternating Current Direct Current Earth ground Terminal The equipment is protected throughout by double insulation or reinforced insulation Application around and remova...

Page 5: ...stated below Input Amplitude DC electric level is zero lnputAmplitude rangeX30 Frequency response 1kHz NOTE If the value of current to be measured is unknown use the maximum measurement position and...

Page 6: ...F CAPACITANCE MEASUREMENT See Figure 7 To measure capacitance connect the Meter as follows 1 Insert the red test lead into the input terminal and the black test lead into the COM terminal 2 Set the ro...

Page 7: ...mum values This sets the display to show high MAX and low MIN readings The Meter enters the manual ranging mode after pressing MAX MIN button Press and hold MAX MIN for over 2 seconds to exit the MAX...

Page 8: ...n 15 minutes AC CURRENT RANGE RESOLUTION ACCURACY 600 A 0 1 A 1 2 5 6000 A 1 A 60mA 0 01mA 1 5 5 600mA 0 1mA 6A 0 001A 2 0 5 10A 0 01A When 5A Continuous measurement is allowed When 5A Continuous meas...

Page 9: ...hen the fuse test has been completed disconnect the connection between the testing leads and the circuit under test and remove the testing leads from the input terminals of the Meter C Replacing the F...

Page 10: ...ts original purchasers in connection with the sales of Sperry products provided that such products shall not have been altered by the distributor The distributor shall be fully responsible for any war...

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