Auto Meter DM-46 Instruction Manual

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DM-46

Instruction Manual

Automotive Multimeter and Inductive Amp Probe

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

Test Equipment

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LIMITED WARRANTY

TABLE OF CONTENTS

SERVICE

For service send your product to Auto Meter in a well-packed shipping carton. Please include a note explaining what the problem is along with your phone number. If you are sending the product back for Warranty adjustment, you must include a copy (or original) of your sales receipt from the place of purchase.

12 MONTHS FROM DATE OF PURCHASE-CABLES 90 DAYS

The manufacturer warrants to the consumer that this product will be free from defects in material or workmanship for a period of twelve (12) months from the date of original purchase. Products that fail within this 12 month warranty period will be repaired or replaced at the manufacturer’s option to the consumer, when determined by the manufacturer that the product failed due to defects in material or workmanship. This warranty is limited to the repair or replacement of parts and the necessary labor by the manufacturer to effect the repair or replacement of the product. In no event shall the manufacturer be responsible for special, incidental or consequential damages or costs incurred due to the failure of this product.

Improper use, accident, water damage, abuse, unauthorized repairs or alterations voids this warranty. The manufacturer disclaims any liability or consequential damages due to breach of any written or implied warranty on its test equipment.

WARRANTY AND SERVICE INFORMATION

Warranty 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 nontransferable. 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 to prevent any damage during return shipment. Repair costs for such damages will be charged back to shipper (customer returning the Test Equipment). Protect the product By shipping in original carton or add plenty of over-pack cushioning such as crumpled up newspaper.

Maintenance and Cleaning -------------------------------2 Safety ----------------------------------------------------------3 Battery Replacement --------------------------------------3 Features -------------------------------------------------------4 Controls and Functions --------------------------------- 4-5 Operation Instructions

DC/AC Current Measurements ---------------------6 DC/AC Voltage Measurements ---------------------7 Diode Test ------------------------------------------------8 Capacitance Measurment ----------------------------8 Temperature Measurement --------------------------8 Resistance Measurement ----------------------------9 Continuity Test ------------------------------------------9 Frequency Measurment ---------------------------- 10 Duty Measurment ------------------------------------ 10 Diode Test ---------------------------------------------- 10 Relative Reading Measurements ---------------- 10 Holding the LCD Reading -------------------------- 11 Finding the MAX/MIN Value ----------------------- 11 Change Auto-range Mode to Manual Mode --- 11

Disable Auto Power Off ----------------------------- 11 Charging System Tests State of Charge -------------------------------------- 12 Amp Draw Check ------------------------------------ 12 Alternator Test ---------------------------------------- 13 Starter Draw Test ------------------------------------14 Specications ---------------------------------------------- 15 Warranty ----------------------------------------------------19

MAINTENANCE and CLEANING

Periodically wipe the case with a damp cloth and detergent;

do not use abrasives or solvents.

Use the hand strap to avoid accidental dropping. Negligent

use of your meter will void the warranty.

Keep away from heat and liquid solvents. Keep in a protective place when not in use.

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SAFETY

Carefully read all operating instructions before using the DM-46 Wear eye protection when working around batteries. Keep sparks, ames, or cigarettes away from batteries. Keep hair, hands, and clothing as well as tester leads and cords

away from moving blades and belts.

Provide adequate ventilation to remove car exhaust.  WARNING: If the clamp meter is used in a manner not specied

by the manufacture, the protection provided by the clamp meter may be impaired.

EN 61010-2-032 CAT II 600V CAT III 300V Pollution Degree2

Denition of Symbols

on the DM-46 and in

the manual.

Caution: Refer to Accompanying Documents

Caution: Risk of Electric Shock

Double Insulation

Overvoltage Category 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 xed installation.

Overvoltage Category III (CAT III):

Equipment in xed installations.

BATTERY REPLACEMENT

1. Turn the power off and remove the test leads from

the clamp meter.

2. Remove the screw of the battery

cover.

3. Lift and remove the battery

cover.

4. Remove the old batteries.

5. lnsert two (AA) batteries.

6. Replace the battery cover and

secure the screw.

When the low battery symbol is displayed on the LCD or the LCD is dark, replace the old batteries with two (AA) batteries.

DUTY:

Range

(<10KHz)

Resolution

(Hz)

Accuracy Sensitivity

1-99% 0.1% 10d 10V

DIODE TEST:

Range Resolution Accuracy Overload

Protection

0-1.999V 0.001V 2.5% 5dgts AC 600V

+-+

SPECIFICATIONS CONTINUED

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FEATURES

10mA high resolution on 40A DC/AC range. Temperature (Degrees C or F) and Capacitance One touch zero for DCA adjustment. Auto-range for V, A, Ω, F, and temperature Frequency (Hz). 23 mm diameter jaw. Fast bar graph display (30 times/sec.) for transient observation. Continuity and frequency measurements. Max/Min and Data Hold functions. 600V overload protection for ohm measurement. Ideal for working in crowded switch box or cable areas.

CONTROLS AND FUNCTIONS

1. Transformer Jaw is used to pick up current signal. It measures DC/AC

current. The jaw must enclose the conducting wire.

2. Transformer Trigger is used to open the jaw.

3. Function Selector Switch is used to select the function such as DCA,

ACA, DCV, ACV, Hz, Ohm and Continuity.

4. AC/DC select switch. This is used to select AC or DC voltage or

current, Hz or Duty, Ohm or Continuity, Capacitance or Diode, °F or °C.

5. Data Hold Button holds the LCD reading when pushed. Press again

to release it. This button is not available in continuity or diode function.

6. Max/Min Hold Button. This button is used to enable the maximum

or minimum value to be displayed and updated during measurement. 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

TEMPERATURE (K Type Thermal Couple w/ Adapter, °C or °F):

Range Resolution Accuracy Overload Protection

-40-0°C 0.1 °C 2.0% 2 °C AC 600V

0-400°C 0.1 °C 0.5% 2°C AC 600V

400-1000°C 1°C 0.5% 2 °C AC 600V

-40-0°F 0.1°F 2.0% 4°F AC 600V

0-400°F 0.1°F 0.5% 4°F AC 600V

400-1800°F 1°F 0.5% 4°F AC 600V

RESISTANCE (Ω):(open voltage 0.4V)

Range Resolution Accuracy Overload Protection

400 Ω 0.1 Ω

1.5% 2dgts AC 600V

4K Ω 1 Ω

1.5% 2dgts AC 600V

40K Ω 10 Ω

1.5% 2dgts AC 600V

400K Ω 100 Ω

1.5% 2dgts AC 600V

4M Ω 1K Ω

1.5% 2dgts AC 600V

40M Ω 10K Ω

1.5% 2dgts AC 600V

CONTINUITY (open voltage 0.4V, Overload Protection Ac600V)

Range Resolution Accuracy Beeping

40-400 Ω 0.1 Ω

1.0% 2dgts

<10.0 Ω (approx)

FREQUENCY: (Auto, sensitivity selected by pressing RANGE Button)

Range

(Hz)

Resolution

(Hz)

Accuracy Sensitivity Overload

Protection

1-100K 0.001-100Hz 0.5% 2dgts 5V AC 600V

+-+

CAPACITANCE:

Range Resolution Accuracy Overload Protection

40nF 10pF 5.0% 0.2nF AC 600V

400nF 0.1nF 3.0% 0.2nF AC 600V

4μ

1nF

3.0% 0.02μF

AC 600V

40μF

10nF

3.0% 0.02μF

AC 600V

400μF

100nF

3.0% 0.02μF

AC 600V

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CONTROLS AND FUNCTIONS

7. VΩRANGE Zero/Relative Button. On voltage or ohm function,

press this button to select manual range.

On other functions, once this button is pressed, the current reading

shall be set to zero and be used as a zero reference value for all other subsequent measurement. The function is also used to remove offset value caused by residual magnetism remaining in the core for the DC current measurement. The Zero/Relative function will be disabled if the MAX/MIN button is pressed. This button is not available in Duty, Hz, Continuity, Diode function.

8. LCD is a 3 3/4 digit Liquid Crystal Display with a maximum indication

of 3999. The functions included are units, symbols, bar graph, sign, decimal points, low battery symbols, max/mim symbols, and zero symbol. Press the zero button again to disable this function.

9. Battery Symbol appears if the battery voltage drops below the

minimum required voltage. Refer to page 3 for battery replacement.

10. Zero/Relative Symbol means a reference value has been

subtracted from the actual reading. The reading shown is an offset value. Press the zero button again to disable this function.

11. Data Hold Symbol appears on the LCD when the hold button is

pressed.

12. Bar Graph has forty segments. It displays segments proportional 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 input for voltage, ohm/continuity, frequency,

capacitance or temperature measurements..

17. COM Terminal (Black) is used as a common reference input.

18. Hand Strap allows you to put your hand through to avoid

accidentally dropping the clamp meter.

SPECIFICATIONS (23oC 5oC)

Range Resolution Accuracy Overload Protection

40A 10mA

1.5% +2dgts DC 400A

0-150A 100mA

1.5% +2dgts DC 400A

150-200A 100mA

2.2% +2dgts DC 400A

DC Current

- -

AC Current

Range Resolution Accuracy Overload

Protection

50/60 Hz 40-1 KHz

40A 10mA

1.5% +2dgts+2.5% +2dgts AC 400A

0-150A 100mA

1.5% +2dgts+2.5% +2dgts AC 400A

150-200A 100mA

2.2% +2dgts+2.5% +2dgts AC 400A

- -

DC Voltage: (Overload Protection: 600V)

Range Resolution Accuracy Input Impedance

400mV 0.1mV

1.5% +3dgts 2.3MΩ

4V 1mV

1.5% +3dgts 2.3MΩ

40V 10mV

1.5% +3dgts 2.3MΩ

400V 100mV

1.5% +3dgts 2.3MΩ

600V 1V

1.5% +3dgts 2.3MΩ

- -

Range Resolution Accuracy Overload

Protection

50/60 Hz 40-1 KHz

0.01-4V 1mV

1.5% +5dgts+2.0% +5dgts AC 800V

40V 10mV

1.5% +5dgts+2.0% +5dgts AC 800V

400V 100mV

1.5% +5dgts+2.0% +5dgts AC 800V

600V 1V

1.5% +5dgts+2.0% +5dgts AC 800V

AC Voltage: (Input Impedance 2.3MΩ)

- -

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1. Set the rotary switch at 40A or 200A and move the

sliding switch to DC.

2. Push the zero button to zero reading the Amp reading.

3. Press the trigger to open the jaw and fully enclose the

conducting wire to be measured. Be sure there is no air gap between the two half jaws.

4. Read the measured value from the LCD.

DC/AC CURRENT MEASUREMENTS

WARNING: Make sure that all the test leads are disconnected

from the meter’s terminals for current measurement.

DC CURRENT

AC CURRENT

1. Set the rotary switch at 40A ~ or 200A ~, and move the

sliding switch to AC.

2. Press the trigger to open the 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 times/sec. (bar graph) Auto-Power-Off 15 Minutes Operating Temperature: -10o C to 50o C Operating Humidity: less than 85% relative Altitude: up to 2000M Storage Temperature -20o C to 60o C Storage Humidity less than 75% relative Dimension: 7.2” x 2.5” x 1.4” Weight: 190g (battery included) Accessories: Adapter for Capacitance and K-type Thermal Couple

Carrying bag Instruction Manual

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DC/AC VOLTAGE MEASUREMENTS

WARNING: Maximum input for DC V is 600, and for AC V is

600. Do not attempt to take any voltage measurement that exceeds the limits. Exceeding the limits could cause electrical shock and damage to the meter.

DC VOLTAGE

AC VOLTAGE

Set the rotary switch at V and move the sliding switch to DC.

2. Insert the test leads into the input jack.

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

circuit to be measured.

4. Read the measured value from the LCD display.

1. Set the rotary switch at V ~

and move the sliding switch to AC

2. Insert the test leads into the input jack.

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

circuit to be measured.

4. Read the measured value from the LCD display.

STARTER DRAW TEST

STARTER SETUP

1. Check with manufacture’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 specications. 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 around the positive conductor leading to the

starter (See illustration above). Make sure the small arrow inside the clamp is pointing in the direction of the current towards the starter. Also make sure the DM-46 is clear of any moving belts, fan blades or anything that might damage the meter.

6. Crank the engine for 3 to 5 seconds.

7. Read the DM-46 and compare with manufactures specications.

8. High Amp reading indicates a faulty starter or engine timing

that would put an extra load upon the starter. Possible starter problems are shorted windings, bent armature, broken housing or bad bearings.

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CAPACITANCE and TEMPERATURE

DIODE TEST

1. Plug the adapter into the terminal.

2. Insert the the capacitor into the adapter.

3. If the capacitance is less than 4nF press zero

(capacitance) button to zero the residual capacitance.

4. Read the capacitance from the LCD.

TEMPERATURE

1. Plug the adapter into the terminal.

2. Insert the K-type thermal couple into the adapter

3. Read the temperature from the LCD.

ALTERNATOR TEST

ALTERNATOR SETUP

1. Select DC Volts on the DM-46.

2. Start the engine.

3. Place the Volt leads to the red (+) positive and black (-) battery

terminals.

4. Allow voltage to stabilize. The reading should be from 13.0 to 15

Volts DC.

5. Turn on all accessories including the headlights.

6. The reading should be 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 of the current towards the battery. Also make sure the DM-46 is clear of any moving belts, fan blades or anything that might damage the meter.

10. If output is lower in DC Amps than the accessories would draw

then the alternator may not be charging. Repeat step 6 to see if the voltage has droped.

11. Select the AC 40 Amp on the DM-46.

12. Clamp the DM-46 as shown above.

13. With the engine still running and all accessories on, the current

ripple should be less than 10 Amps AC. If more, the diodes are bad.

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RESISTANCE MEASUREMENT

1. Set the rotary switch to Ω.

2. Insert the test leads into the input jack.

3. Connect the test probes of the test leads to the two ends

of the resistor or circuit to be measured.

4. Read the measured value from the LCD.

CONTINUITY TEST

WARNING: Before taking any in-circuit resistance

measurement, remove power from the circuit being tested and discharge all the capacitors.

1. Turn the rotary switch to Ω position and move the sliding

switch to AC position.

2. lnsert the test leads into the input jack.

3. Connect the test probes of the test leads to the two ends

of the resistor or circuit to be measured.

4. Read the measured value from the LCD.

5. lf 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 and all accessories.

5. Select DC 40 Amps on the DM-46.

6. Zero the DM-46 by pressing the yellow button.

7. Clamp the DM-46 around the positive (+) battery cable . Make

sure it is clamped around all wires.

8. If the display is above 2 Amps there is probably a draw upon

the battery by the electrical system. This will drain the battery. Isolate and follow a suspected circuit and repeat reading until the problem is found. Consider a negligible drain with an on board computer.

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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 specic measurement,

they can press the VΩRANGE button to select appropriate range. To return to auto-range, press and hold the VΩRANGE 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.

HOLDING THE LCD READING

FREQUENCY (Hz) MEASUREMENT