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the "       " position then push the  " FUNC. button "
( 3-7, Fig. 1 ) for display show "       ".

4)when the resistance value is less than 10 ohm, the

beeper sound will be generated.

5-5 Diode Test

1)Connect BLACK test lead into " COM " terminal.
2)Connect RED test lead into " V " terminal.
3)Select the " Function rotary switch "  ( 3-4, Fig. 1 ) to

the "        " position then push the  " FUNC. button "
( 3-7, Fig. 1 ) for display show "      ".

4)a. When connected with polarity as shown in Fig. 2, a

forward current flow is established and the approx.
Diode Forward Voltage (VF) value in volt will
appears on the display reading. If the diode under
test is defective, " .000 " or near " .000 " value 
( short circuit ) or " OL " ( open circuit ) will be
displayed.

Fig. 2

Fig. 3

b. When connected as shown in Fig. 3, a reverse check

on the diode is made.  If the diode under test is
good, " OL " will be displayed. If the diode under test
is defective, " .000 " or other numbers will be
displayed. Proper diode testing should include both
steps a. and b. above.

9

Summary of Contents for DL-9954

Page 1: ...ou into the field of precision measurement Although this ACA LEAKAGE TESTER is a complex and delicate instrument its durable structure will allow many years of use if proper operating techniques are d...

Page 2: ...input terminal Remove test leads before open the battery cover Cleaning Only use the dry cloth to clean the plastic case Double insulation Function earth Environment Conditions Jaw Section CAT III 60...

Page 3: ...ASURING PROCEDURE 7 5 1 Symbols Units of Display 7 5 2 DCV ACV Measurement 8 5 3 Resistance Measurement 8 5 4 Continuity Check 8 5 5 Diode Test 9 5 6 AC leakage Current AC Current Measurement 10 5 7 R...

Page 4: ...on Two AC leakage current range 40 mA 400 mA Two AC current range 40 A 120 A Data hold Relative measurement Crystal time base high quality LCD display allows clear readout out even at high ambient lig...

Page 5: ...ing Less than 80 RH Humidity Weight 251 g 0 55 LB including battery Dimension HWD 191 x 64 5 x 36 1 mm 7 5 x 2 5 x 1 4 inch Max Jaw 16 0 mm 0 63 inch Dia Open Size Accessories Operation manual 1 PC In...

Page 6: ...V 1 V 1 2 5d ACA 40 mA 0 01mA Leakage 1 5 3d true rms 400 mA 0 1mA 0 1 to 400 mA 0 to 39 99 A 0 01 A 1 5 3d ACA 40 to 100 A 0 1 A AC 120A true rms 100 0 to 0 1 A 3 3d 0 01 to 120 A 120 A Remark True...

Page 7: ...d 400 K ohm 100 ohm 4 M ohm 1 K ohm 2 2d AC DC 400 V 40 M ohm 10Kohm 3 5 5d Diode Short non conductance good defect test Continuity If measuring resistance is less than 10 ohm the beeper will sound Re...

Page 8: ...rent Sense Jaws 3 2 Trigger 3 3 Function Indicator 3 4 Function rotary switch 3 5 Range button 3 6 Hold button 3 7 FUNC button Function button 3 8 REL button Relative button 3 9 Display 3 10 Input ter...

Page 9: ...exceed the maximum rated voltage to the input terminal 6 Always switching the Function Rotary Switch to the OFF position when the instrument is not operation 7 Remove the battery if the instrument is...

Page 10: ...Appears when the Relative function is operated Battery voltage is under the low condition already Appears when operating the Automatic range mode Appears when the Continuity beeper is operated mV V Un...

Page 11: ...6 Under the operation of auto range mode push the Range button 3 5 Fig 1 will hold the range 5 3 Resistance Measurement 1 Connect BLACK test lead into COM terminal 2 Connect RED test lead into termin...

Page 12: ...a When connected with polarity as shown in Fig 2 a forward current flow is established and the approx Diode Forward Voltage VF value in volt will appears on the display reading If the diode under tes...

Page 13: ...g 1 to open the Current Sensor Jaws 3 1 Fig 1 clamp on the measure conductor only 3 When LCD show the AUTO marker the meter is under the auto range mode Meter will select the suitable measurement rang...

Page 14: ...educt last measured values automatically then show those new value on the display 3 It will release the Relative Measurement function if push the REL button at once again at same time the REL marker w...

Page 15: ...ery However in spec measurement may still be made for several hours after Low battery indicator appears before the instrument become inaccurate 2 Open the screw of Battery Cover 3 11 Fig 1 by screwdri...

Page 16: ...ESSORIES ADAPTER Item Model Carrying Case CA 52A Light Adapter LX 02 EMF Adapter EMF 824 Pressure Adapter PS 403 Anemometer Adapter AM 402 Tachometer Adapter TA 601 Sound Adapter SL 406 High Voltage P...

Page 17: ...8 THE ADDRESS OF AFTER SERVICE CENTER 14 1103 DL9954A...

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