background image

6

Notes
•  In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.8V; however; the 

reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips.

•  Connect the test leads to the proper terminals to avoid error display.  The LCD displays OL indicating open-

circuit for improper connection.  

• Open circuit voltage is approximately 3V.

4.7 CAPACITANCE 

 

  

   

WARNING

  To avoid damage to the meter or to the equipment under test disconnect circuit power and discharge 

capacitors before measuring capacitance.

The beeper sounds continuously for open conditions 

1. Insert the red test lead into the 

terminal and the black test lead into the COM terminal.

2. Set the rotary switch to 

 measurement mode, the Meter may display a fixed reading which is an internal distributed 

capacitor value. 

3. To improve the measurement accuracy of small value capacitors (less than 10nF) press REL

 with the test leads open 

to subtract the residual capacitance of the Meter and test leads.

Notes: 
• If “OL” displays this indicates that the tested capacitor is shorted or it exceeds the maximum range.
• Capacitors larger than 400µF take more time to measure. 

4.8 FREQUENCY Hz

 

WARNING

  To avoid personal injury do not attempt to measure voltage higher than 60V DC 30V AC during frequency 

measurement.

The measurement ranges for frequency are between 10Hz and 10MHz auto ranging on this meter.
1. Insert the red test lead into the Hz terminal and the black test lead into the COM terminal.
2. Set the rotary switch to Hz.
3. Connect the test leads across the component being measured.
4. Read the value on the display.
 
5.0 BATTERY REPLACEMENT

  

WARNING

  To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as 

soon as the low battery indicator appears.

1. Disconnect the connection between the test leads and the circuit under test, and remove the test leads from the input 
terminals of the meter.
2. Turn the Meter power off.
3. Remove the rubber boot from the meter.
4. Remove the 3 screws from the case bottom, and separate the case top from the case bottom.
5. Remove the battery from the contacts, noting the polarity of the battery terminals and contacts.
6. Replace with one fresh 9 volt battery. (NEDA 1604 6F22 006P)

Note: Do not use rechargeable batteries in this unit.

7.  Carefully rejoin the case bottom and case top. Do not overtighten the screws as this may strip the threads in the meter 

housing.

8. Reinstall rubber boot.

Содержание DM6450

Страница 1: ...olt Ranges 4V 40V 400V 750V best accuracy 1 0 5 DC Volt Ranges 400mV 4V 40V 400V and 1000V best accuracy 0 8 1 AC Amps 400 A 4000 A 40mA 400mA 4A and 10A best accuracy 1 2 2 DC Amps 400 A 4000 A 40mA...

Страница 2: ...ter WARNING 7 Before using to check hazardous voltage always test this Digital Multimeter on a known live circuit to verify that this Digital Multimeter is working properly WARNING 8 Use the Meter onl...

Страница 3: ...ING To avoid damage to the meter do not use this button when the measured voltage is higher than 250V Do not press this button for more than 3 seconds 1 Press and hold Low imp 400K button to switch in...

Страница 4: ...sition has a 4 0 A and a 10A range and is auto ranging Start with this 10A setting if the measured current is between 1A 10A Use the mA setting if the measured current is 400mA Use the A setting if th...

Страница 5: ...ment 4 5 CONTINUITY WARNING T o avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance WARNING Do no...

Страница 6: ...rger than 400 F take more time to measure 4 8 FREQUENCY Hz WARNING To avoid personal injury do not attempt to measure voltage higher than 60V DC 30V AC during frequency measurement The measurement ran...

Страница 7: ...fuses or test leads When a warranty claim arises the purchaser must contact Sperry Instruments If the defect comes under the terms of this limited warranty Sperry Instruments will arrange at its sole...

Отзывы: