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1. 

Set the rotary switch at Hz.

2. 

Insert the test leads into the input jack.

3. 

Connect the test prods of the test leads in PARALLEL to 

the signal or circuit being measured.

4. 

Read the measured value from the LCD display.

1.

  Set the rotary switch at Duty. 

2

.  Insert the test leads into the input jack. 

3

.  Connect the test prods of the test leads in PARALLEL to 

  the signal or circuit to be measured. 

4. 

Read the measured value from the LCD display. 

1. 

Set the rotary switch at diode. 

2.

  Insert the test leads into the input jack. 

3.

  Connect the test prods of the test leads to the two ends 

  of a diode.

4

.  Read the diode voltage from LCD. 

RELATIVE READING MEASUREMENTS

DUTY MEASUREMENT 

DIODE TEST

The zero button also can be used to make a relative 

measurement. Once the button is pushed, the current reading is 

set to zero and a zero symbol will be displayed on LCD. All the 

subsequent measurement shall be displayed as a relative value 

with respect to the value being zeroed. Press the zero button 

again to return to normal mode. But this function is disabled 

if MAX/MIN function is enabled. Please watch for symbol 

displayed on LCD.

Press the HOLD button and the reading will be held on the  

LCD.

FINDING THE MAX/MIN VALUE 

Press the MAX/MIN button to enable the maximum and 

minimum values to be recorded and updated during 

measurement. Push the button once, the maximum value will 

be displayed and updated. The LCD display toggles between 

the MAX and MIN values. To exit MAX/MIN function, press 

and hold the MAX/MIN button for more than 2 seconds. 

If MAX/MIN button is pressed, the ZERO function will be 

disabled and the ZERO symbol will disappear from LCD.

CHANGE AUTO RANGE MODE TO MANUAL

DISABLE AUTO-POWER-OFF 

If users want to select certain range for specific measurement, 

they can press the V

RANGE button to select appropriate 

range. To return to auto-range, press and  hold the V

RANGE 

button for 2 seconds.

The meter will turn itself off 15 minutes after power-on (A 

symbol of APO is displayed in LCD). Also pressing any button 

or turning the rotary switch will reset the 15 minute timer. 

To disable the Auto-Power-Off function, hold the HOLD button 

while turning on power. 

10

11

HOLDING THE LCD READING

FREQUENCY (Hz) MEASUREMENT  

Summary of Contents for DM-46

Page 1: ...The DM 46 is the auto industry s answer to pocket portability in a professionally accurate meter 2650 1910 77 11 9 16 Auto Meter Products Inc 413 West Elm Street Sycamore IL 60178 Service 815 899 0801 Toll Free 866 883 TEST 8378 www autometer com test T est Equipment 20 1 ...

Page 2: ...y claims to the manufacturer s service department must be transportation prepaid and accompanied with dated proof of purchase This warranty applies only to the original purchaser and is non transferable Shipper damage incurred during return shipments is not covered under this warranty It is the responsibility of the shipper the customer returning the Test Equipment to package the tester properly t...

Page 3: ...ry I CAT I Equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low lever Overvoltage Category II CAT II Energy consuming equipment to be supplied from the fixed installation Overvoltage Category III CAT III Equipment in fixed installations BATTERY REPLACEMENT 1 Turn the power off and remove the test leads from the clamp meter 2 Rem...

Page 4: ...easurement Press once minimum value shall be display and updated Press again maximum value shall be displayed and updated Zero function will be disabled if MAX MIN is enabled This button is not available in Duty Hz Continuity Diode or Capacitance function SPECIFICATIONS CONTINUED 4 17 TEMPERATURE K Type Thermal Couple w Adapter C or F Range Resolution Accuracy Overload Protection 40 0 C 0 1 C 2 0 ...

Page 5: ... to the actual reading Each segment represents one count 13 MAX or MIN is displayed on the LCD when the MIN MAX button is pressed 14 Continuity Symbol If continuity function is selected this symbol shall appear on LCD 15 Units are displayed on the LCD when a function is selected The corresponding symbols are V A Ω and Hz 16 V Ω Hz Capacitance Temperature input Terminal This terminal is used as inp...

Page 6: ...e jaw and fully enclose the conducting wire to be measured Be sure there is no air gap between the two half jaws 3 Read the measured value from the LCD SPECIFICATIONS Conductor Size 23mm max approx Battery Type two 1 5V AA Display 3 3 4 LCD with 40 seg bar graph Range Selection manual Overload Indication OL Power Consumption 10mA approx Low battery Indication Sampling Time 3 times sec display 30 t...

Page 7: ...s proper procedure to disable ignition if needed Improper methods could cause damage to vehicles that are computer controlled 2 Determine the manufactures Starter Draw specifications If not available use the following chart as a guide 3 Select DC 200 Amp and zero the DM 46 by pressing the yellow button 4 Press the MAX MIN button twice and make sure the display reads HOLD MAX 5 Clamp the DM 46 arou...

Page 8: ...from 12 8 to 15 Volts DC If the reading is low the alternator is not charging If the reading is high the alternator is over charging and could damage the battery 7 Switch the DM 46 to DC 200 Amps 8 Clamp the DM 46 around the positive alternator conductor leading to the positive terminal of the battery See illustration above 9 Make sure the small arrow inside the clamp is pointing in the direction ...

Page 9: ... the resistance is lower than 10 Ω a beeping sound will be heard CHARGING SYSTEM TESTS The following section shows what you can do with the DM 46 in testing your charging system State of Charge 1 Select DC Volts on the DM 46 2 Place the Volt leads to the red positive and black battery terminals 3 If the Volts are less than 12 5 Volts the battery needs charging Amp Draw Check 4 Turn off ignition an...

Page 10: ...rmal mode But this function is disabled if MAX MIN function is enabled Please watch for symbol displayed on LCD Press the HOLD button and the reading will be held on the LCD FINDING THE MAX MIN VALUE Press the MAX MIN button to enable the maximum and minimum values to be recorded and updated during measurement Push the button once the maximum value will be displayed and updated The LCD display tog...

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