37XRA - Multimeter Amprobe - Free user manual and instructions

USER MANUAL 37XRA Amprobe

Professional Digital Multimeter True RMS with Component and Logic Test Users Manual

3. Function/Range Switch

Commutateur de gamme/ fonction Funktion/Bereich-Schalter Selettore funzione/portata Selector de la función y del rango

4. Test Lead Connections

6. Battery/Fuse Cover

Capot des fusibles/pile Batterie-/Sicherungsabdeckung Sportello del vano portapile/ fusibili Puerta de la batería y el fusible3 Safety Information

• The 37XR-A Digital Multimeter is UL, CSA, and EN61010-1 certified for Installation Category III – 600V and Category II – 1000V. It is recommended for use with local level power distribution, appliances, portable equipment, etc, where only smaller transient overvoltages may occur, and not for primary supply lines, overhead lines and cable systems. CAT II: Is for measurements performed on circuits directly connected to the low- voltage installation. CAT III: Is for measurements performed in the building installation.

• Do not exceed the maximum overload limits per function (see specifications) nor the limits marked on the instrument itself. Never apply more than 1000V dc/750 V ac rms between the test lead and earth ground.

• Inspect the DMM, test leads and accessories before every use. Do not use any damaged part.

• Never ground yourself when taking measurements. Do not touch exposed circuit elements or test probe tips.

• Do not operate the instrument in an explosive atmosphere.

• Exercise extreme caution when: measuring voltage >20V // current >10mA // AC power line with inductive loads // AC power line during electrical storms // current, when the fuse blows in a circuit with open circuit voltage >1000 V // servicing CRT equipment.

• Always measure current in series with the load – NEVER ACROSS a voltage source. Check fuse first. Never replace a fuse with one of a different rating.

• Do not change the position of the Function/Range Switch while the MIN MAX, feature is enabled. Erroneous readings will result.

• Remove test leads before opening the Battery Cover or case. Symbols Used in this Manual Battery Refer to the manual Double insulated Dangerous Voltage Direct Current Earth Ground Alternating Current Audible tone Fuse Underwriters Laboratories, Inc Complies with EU directives4 Introduction The 37XR-A is a true rms autoranging handheld digital multimeter for measuring or testing the following:

• Logic Levels, TTL or CMOS Additional features include: MIN MAX AVG, HOLD, REL, PEAK±, Backlight, and Range Lock Making Measurements Verify Instrument Operation Before attempting to make a measurement, verify that the instrument is operational and the battery is good. If the instrument is not operational, have it repaired before attempting to make a measurement. Range Selection In addition to autoranging the 37XR-A allows you to manually select and lock a range by pressing the RANGE button. RANGE appears on the display to indicate that manual ranging is active. Each subsequent press of the range button steps the meter to the next higher range. When the highest range is reached the next press returns the meter to the lowest range. To return to autoranging press and hold the RANGE button for 2 seconds. RANGE no longer shows on the display. Use autorange for all initial measurements. Then, when appropriate, use the RANGE button to select and lock a range. Warning To avoid electrical shock while manual ranging use the display an- nunciators to identify the actual range selected. Correcting an Overload ( or ) Indication An or indication may appear on the display to indicate that an overload condition exists. For voltage and current measurements, an overload should be immediately corrected by selecting a higher range. If the highest range setting does not eliminate the overload, interrupt the measurement until the problem is identified and eliminated. The indication is normal for some functions; for example, resistance, continuity, and diode test.5 Measuring DC Voltage See Figure -1-

1. Set the Function Switch to .

3. Connect the Test Leads: Red to , Black to

4. Connect the Test Probes to the circuit test points.

5. Read the display, and, if necessary, correct any overload (

) conditions. Measuring AC Voltage (True rms) See Figure -2 - & -3- See Additional Features to find out the advantages of true rms.

1. Set the Function Switch to

dBm is displayed, press the yellow button to turn off dBm (enable )

4. Connect the Test Leads: Red to

5. Connect the Test Probes to the circuit test points.

6. Read the display, and, if necessary, correct any overload ( ) conditions.

Preparing for Current Measurements

• Turn off circuit power before connecting the test probes.

• Allow the meter to cool between measurements if current measurements approach or exceeds 10 amps.

• A warning tone sounds if you connect a test lead to a current input before you select a current function.

• Open circuit voltage at the measurement point must not exceed 1000 V.

• Always measure current in series with the load. Never measure current across a voltage source. Measuring DC Current See Figure -4-

1. Set the Function Switch to a current function,

10A function is not selected and RANGE is displayed, press the RANGE button to enable autoranging.

3. Connect the Test Leads: Red to

4. Turn off power to the circuit being measured.

5. Open the test circuit ( ) to establish measurement points.

6. Connect the Test Probes in series with the load.

7. Turn on power to the circuit being measured.

8. Read the display, and, if necessary, correct any overload ( or ) conditions.

Measuring AC Current (True rms) See Figure -3- & -5- See Additional Features to find out the advantages of true rms.

1. Set the Function Switch to a current function and range,

is displayed, press the yellow button to turn on

function is not selected and RANGE is displayed, press the RANGE button to enable autoranging.

4. Connect the Test Leads: Red to

5. Turn off power to the circuit being measured.6

5. Open the test circuit ( ) to establish measurement points.

6. Connect the Test Probes in series with the load.

7. Turn on power to the circuit being measured.

8. Read the display, and, if necessary, correct any overload ( ) conditions.

Measuring Resistance See Figure -6-

1. Set the Function Switch to .

is displayed, press the yellow button to display .

4. Connect the Test Leads: Red to , Black to

5. Turn off power to the circuit being measured. Never measure resistance across a

voltage source or on a powered circuit.

6. Discharge any capacitors that may influence the reading.

7. Connect the Test Probes across the resistance.

8. Read the display. If appears on the highest range, the resistance is too large to

be measured. Testing for Continuity See Figure -7-

1. Set the Function Switch to .

is displayed, press the yellow button to display .

3. Connect the Test Leads: Red to , Black to

4. Turn off power to the circuit being measured.

5. Discharge any capacitors that may influence the reading.

6. Connect the Test Probes across the resistance.

7. Listen for the tone that indicates continuity (< 40 ).

Testing Diodes See Figure -8-

1. Set the Function Switch to .

2. Connect the Test Leads: Red to , Black to

3. Turn off power to the circuit being measured.

4. Free at least one end of the diode from the circuit.

5. Connect the Test Probes across the diode.

6. Read the display. A good diode has a forward voltage drop of about 0.6 V. An

open or reverse biased diode will read . Measuring Capacitance See Figure -9-

1. Set the Function Switch to the function.

3. Connect the Test Leads: Red to

4. Turn off power to the circuit being measured.

5. Discharge the capacitor using a 100 k resistor.

6. Free at least one end of the capacitor from the circuit.

7. Connect the Test Probes across the capacitor. When measuring an electrolytic

capacitor match the test lead polarity to the polarity of the capacitor.

1. Set the Function Switch to

3. Connect the Test Leads: Red to

4. Turn off power to the circuit being measured.

5. Free at least one end of the inductor from the circuit.

6. Connect the Test Probes across the inductor.

7. Read the display.

Measuring Frequency See Figure -11-

1. Set the Function Switch to

4. Connect the Test Leads: Red to

5. Connect the Test Probes to the signal source.

3. Connect the Test Leads: Red to %, Black to

4. Connect the Test Probes to the signal source.

5. Read the display.

Measuring dBm See Figure -13- The 37XR-A measures dBm relative to 1 mW referenced to 50 . That is, 10 dBm = 10 mW, 0 dBm = 1 mW, -10 dBm = 0.1 mW, etc.

1. Set the Function Switch to

dBm to verify the selection.

3. Connect the Test Leads: Red to , Black to

4. Connect the Test Probes to the signal source.

5. Read the display.

Testing Logic Levels See Figure -14- The 37XR-A tests logic levels for both TTL and CMOS logic. The meter displays plus a for a high-level (true) condition. The meter beeps and displays an and a for a low-level (false) condition. See Specifications for the logic 1 and logic 0 voltage limits. Out-of-limits indications are dispalyed as only, no , or beep occur.

1. Set the Function Switch to

3. Connect the Test Leads: Red to , Black to

4. Connect the black lead to logic common.

5. Connect the red lead to the logic test point.

6. Read the display.8

Additional Features Input Test Lead Warning The meter emits a continuous tone when a test lead is placed in the

10A input jack and the Function/Range Switch is not set to a correct current position. (If the meter is connected to a voltage source with leads connected for current, very high current could result). All current ranges are protected by fast acting fuses. True-rms Measurements For ac measurements most DMMs average the ac input signal and display the result as an estimated rms value. This average-responding method is accurate for sinusoidal waveforms, but can be very inaccurate for distorted waveforms. To ensure the most accurate measurements, always use a true-rms DMM when measuring ac voltage or ac current on circuits for the following kinds of applications:

• Power Supplies - diodes

• Any non-sinusoidal ac waveform MIN MAX AVG Measurements The MIN MAX AVG function reads and updates the display to show the maximum or minimum value measured after you press the

button for less than 1 second will put the meter into a mode of displaying the maximum, minimum, average, or actual readings. Each time the button is pressed, the meter will cycle to the next display mode as shown in the table below. Press the

button for more than 2 seconds to disable this feature. Button Display Value Displayed < 1 second REC MAX Maximum value after feature activated REC MIN Minimum value after feature activated < 1 second REC AVG Average value after feature is activated < 1 second REC Actual reading, min max being recorded. > 2 seconds Exit

Normal measurement, actual reading Peak Hold Measurements Note: The PEAK function calibrates itself to meet the specifications. Peak Hold records and stores the positive and negative peak values that occur while measuring ac current or ac voltage. To enable the Peak Hold feature press the PEAK button for more than 2 seconds. The display will show CAL to indicate the calibration cycle is in process. After the CAL indication clears, press the PEAK button again to display the maximum (P+) value for the ac voltage or ac current being measured. The display will toggle between the P+ and P- readings each time the PEAK button is pressed. Press the PEAK button for more than 1 second to exit the PEAK function.9 Beeper Off The beeper is an aural indicator to identify when the DMM is performing a function, making a range change, detecting a limit, and so on. To disable the beeper use the following procedure:

1. Set the Function Switch to

2. Press and hold the

HOLD button while turning the Function Switch to the desired function. The no-beep symbol shows on the display.

HOLD button. The Auto Power Off feature will remain disabled until the meter is turned off and then on. Note: To disable both the beeper and Auto Power Off press and hold the REL button while turning on the DMM. Auto Power Off Auto Power Off is a battery saving feature that puts the meter into a sleep mode if the Function/Range Switch has not changed position in the last 30 minutes. To wake the meter turn it off and then on. The Auto Power Off feature can be disabled to keep the meter from going to sleep. This feature is useful when using the MIN MAX mode for extended periods. To disable the Auto Power Off feature use the following procedure:

1. Set the Function Switch to

2. Press and hold the

button while turning the Function Switch from OFF to the desired function. The SLEEP OFF message shows on the display.

button. The Auto Power Off feature will remain disabled until the meter is turned off and then on. Note: To disable both Auto Power Off and the beeper press and hold the REL button while turning on the DMM. REL (Relative) Measurements The Relative mode displays the difference between the actual reading and a reference value. It may be used with any function or range. To make a relative measurement first establish a reference value by measuring a value and then pressing the REL button after the reading has stabilized. This stores the measured value as the reference and sets the display to zero. The meter subtracts the reference value from subsequent measurements and displays this difference as the relative value. Measurement values greater than the reference value will be positive and values less than the reference value will be negative. To exit the Relative Mode, Press and hold the REL button for 2 seconds. HOLD Measurements The HOLD button causes the meter to capture and continuously display a measurement reading. To use the HOLD feature make a measurement, and then, after the reading has stabilized, momentarily press the HOLD button. You can remove the test leads and the reading will remain on the display. Pressing the HOLD button again releases the display. Backlight Pressing the button illuminates the display with a blue backlight. The backlight will automatically turn off in about 60 seconds. Frequent use of the backlight will decrease battery life.10 Product Maintenance Cleaning To clean the meter, use a soft cloth moistened with water. To avoid damage to the plastic components do not use benzene, alcohol, acetone, ether, paint thinner, lacquer thinner, ketone or other solvents to clean the meter. Troubleshooting If the meter appears to operate improperly, check the following items first.

1. Review the operating instructions to ensure the meter is being used properly.

2. Inspect and test the continuity of the test leads.

3. Make sure the battery is in good condition. The low battery symbol

appears when the battery falls below the level where accuracy is guaranteed. Replace a low-battery immediately.

4. Check the condition of the fuses if the current ranges operate incorrectly.

Battery and Fuse Replacement See Figure -15- WARNING To avoid electrical shock remove the test leads from both the meter and the test circuit before accessing the battery or the fuses. To access the battery and the mA fuse remove the two screws holding the Battery/ Fuse Cover in place, and lift the cover from the meter. To replace the mA fuse, pry it from its clips using a small screwdriver. A spare mA fuse is located between the battery and the mA fuse.

FP500) To replace the 10 A fuse: 1) Remove the battery. 2) Remove the four rear-case screws.

FP100). Repair All test tools returned for warranty or non-warranty repair or for calibration should be accompanied by the following: your name, company’s name, address, telephone number, and proof of purchase. Additionally, please include a brief description of the problem or the service requested and include the test leads with the meter. Non- warranty repair or replacement charges should be remitted in the form of a check, a money order, credit card with expiration date, or a purchase order made payable to Amprobe

Test Tools. In-Warranty Repairs and Replacement – All Countries Please read the warranty statement and check your battery before requesting repair. During the warranty period any defective test tool can be returned to your Amprobe

Test Tools distributor for an exchange for the same or like product. Please check the “Where to Buy” section on www.amprobe.com for a list of distributors near you. Additionally, in the United States and Canada In-Warranty repair and replacement units can also be sent to a Amprobe

Test Tools Service Center (see below for address).11 Non-Warranty Repairs and Replacement – US and Canada Non-warranty repairs in the United States and Canada should be sent to a Amprobe

Test Tools Service Center. Call Amprobe

Test Tools or inquire at your point of purchase for current repair and replacement rates. In USA Amprobe

Test Tools Mississauga, ON L4Z 1X9 Tel: 905-890-7600 Fax: 905-890-6866 Non-Warranty Repairs and Replacement – Europe European non-warranty units can be replaced by your Amprobe

Test Tools distributor for a nominal charge. Please check the “Where to Buy” section on www. amprobe.com for a list of distributors near you. European Correspondence Address* Amprobe

Test Tools Europe P.O. Box 1186 5602 BD Eindhoven The Netherlands *(Correspondence only – no repair or replacement available from this address. European customers please contact your distributor). WARRANTY This 37XR-A Digital Multimeter is warranted against any defects of material or workmanship within a period of three (3) years following the date of purchase of the multimeter by the original purchaser or original user. Any multimeter claimed to be defective during the warranty period should be returned with proof of purchase to an authorized Amprobe

Test Tools Service Center or to the local Amprobe

Test Tools dealer or distributor where your multimeter was purchased. See Repair section for details. Any implied warranties arising out of the sale of a Amprobe

Test Tools multimeter, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to the above stated one (1) year period. Amprobe

Test Tools shall not be liable for loss of use of the multimeter or other incidental or consequential damages, expenses, or economical loss or for any claim or claims for such damage, expenses or economical loss. Some states do not allow limitations on how long implied warranties last or the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.12 Specifications General Specifications (Stated accuracy at 23 °C ±5 °C, <75 % relative humidity.) Display: 4 digit liquid crystal display (LCD) with a 41 segment analog bargraphic. Auto ranging: 9999 counts Manual ranging: 9999 counts Polarity: Automatic, positive implied, negative polarity indication. Overrange: (OL) or (-OL) is displayed. Zero: Automatic. Low battery indication: The is displayed when the battery voltage drops below the operating level. Auto power off: Approx. 30 minutes. Measurement rate: 2 times per second, nominal. Operating environment: 0 °C to 50 °C at < 70 % R.H. For all functions except 10A ranges 10A ranges: 0 °C to 40 °C at < 70 % R.H. Storage temperature: -20 °C to 60 °C, 0 to 80 % R.H. with battery removed from meter. Temperature Coefficient: 0.1 × (specified accuracy) per °C. (0 °C to 18 °C, 28 °C to 50 °C). Altitude: (2000 m) 6562 feet Power: Single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22. Battery life: 75 hours typical with carbon-zinc. 150 hours typical with alkaline. Using the backlight will decrease battery life. Dimensions: 196 mm (H) ×92 mm (W) ×60 mm (D). Weight: with battery and holster, 482 grams Box contents: Test leads /w alligator clips 1 set Users Manual 1 Magne-Grip® Holster 1 Clip, magnet, and strap. 1 9V battery (installed) 1 spare mA fuse 0.5A/1000V 1 Approvals: Safety: Conforms to EN61010-1:2010; EN61010-2-033:2012: Cat II – 1000V / Cat III - 600V; Class 2, Pollution degree II; UL61010-1 EMC: Conforms to EN61326-1. This product complies with requirements of the following European Community Directives: 89/ 336/ EEC (Electromagnetic Compatibility) and 73/ 23/ EEC (Low Voltage) as amended by 93/ 68/ EEC (CE Marking). However, electrical noise or intense electromagnetic fields in the vicinity of the equipment may disturb the measurement circuit. Measuring instruments will also respond to unwanted signals that may be present within the measurement circuit. Users should exercise care and take appropriate precautions to avoid misleading results when making measurements in the presence of electronic interference. Electrical Specifications DC VOLTS Ranges: 1000mV, 10V, 100V, 1000V (Auto/Manual ranging ) Resolution: 100 μV Accuracy: ±(0.1 % rdg + 5 dgts) Input impedance: 10 M Overload protection: 1000 V dc or 750 V ac rms AC VOLTS TRUE RMS (45 Hz - 2 kHz) Ranges: 1000mV, 10V, 100V, 750V (Auto/Manual ranging ) Resolution: 100 μV Minimum reading on 1000mV range: 14 mV Accuracy: ±(1.2 % rdg + 10 dgts) 45 Hz to 500 Hz ±(2.0% rdg + 10 dgts) 500 Hz to 2 kHz ±(2.0% rdg + 10 dgts) 45 Hz to 1 kHz on 750 V range13 10A/1000V fast blow ceramic fuse 10×38 mm on 10A input 10A input: 10 A for 4 minutes maximum followed by a 12 minute cooling period Burden voltage: See DC Current RESISTANCE Ranges: 1000 , 10k , 100k , 1000k , 10M , 40M (Auto/Manual ranging) Resolution: 100 m Accuracy: ±(0.5% rdg + 8 dgts) on 1000 to 1000k ranges ±(1.0% rdg + 10 dgts) on 10M range ±(2.0% rdg + 10 dgts) on 40M range Open circuit volts: -0.45 V dc typical Overload protection: 1000 V dc or 750 V ac rms CAPACITANCE Ranges: 40nF, 400nF, 4μF, 40μF 400uF (3999 counts) (Auto/Manual ranging) Resolution: 0.01 nF Accuracy: ±(3.0 % rdg + 10 dgts) on 40nF, 400uF ranges ±(3.0 % rdg + 5 dgts) on 400nF to 40uF ranges Test voltange: < 1 V Test Frequency: 1.3 Hz on 40nF to 40μF ranges; 0.7 Hz on 400μF range Input protection: 0.5A/1000V fast blow ceramic fuse 6.3×32 mm on μA/mA input INDUCTANCE Ranges: 4mH, 40mH, 400mH, 4H, 40H ( 3999 counts ) (Auto/Manual ranging ) Resolution: 1 μH Accuracy: ±(5.0 % rdg + 30 dgts)* *For values of Q

Thresholds Logic 0 (Lo):

TTL : 0.8 V ± 0.5 V, CMOS: 2 V ± 0.5 V

Test Voltage: TTL: 5 V dc, CMOS: > 5 V dc and < 10 V dc Frequency Response: 20 MHz Pulse Width: 25 ns min Duty Cycle: >30 % and <70 % Indication: 40 ms beep at logic 0 ( LO ) Overload protection: 1000 V dc or 750 V ac rms dBm Ranges: -13dBm to + 50dBm Resolution: 0.01 dBm Accuracy: ±0.7 dB + 8 dgts (45 Hz to 5 kHz) ±2.5 dB + 8 dgts (5 kHz to 10 kHz) Reference impedance: 50 Input protection: 10 M Overload protection: 1000 V dc or 750 V ac rms CONTINUITY Audible indication: Less than 40 Response time: 100 ms Overload protection:1000 V dc or 750 V ac rms DIODE TEST Test current: 1.0 mA (approximate) Accuracy: ±(1.5 % rdg + 5 dgts) Resolution: 1 mV Open circuit volts: 3.0 dc typical Overload protection: 1000 V dc or 750 V ac rms mA, 10A jack: Input warning detects wrong function selection AUXILIARY FEATURES MIN/AVG/MAX: Displays the maximum, minimum, or average reading following a MIN, MAX, or AVG selection. DATA HOLD: Freeze the latest reading on the display. REL: Initiates relative measurements. PEAK : Record the peak+ or peak value in a measurement. It is usable with ac voltage, ac current measurements. If the pressed time >2 seconds, the PEAK function will enter the calibration mode; the LCD will show CAL and the internal buffer will remember the internal offset voltage then go back to the measure mode. RANGE: Initiates manual-range selection. Backlight: Backlight auto-off approx. 60 seconds TTL/CMOS: Shift LOGIC TTL or CMOS Shift: Shift dBm, ACA, continuity, DUTY CYCLE REPLACEMENT PARTS TL36 Test Lead Set with Alligator clips FP500 mA fuse - Fuse Pack 0.5A/1000V (4 each) FP100 10A fuse - Fuse Pack 10A/1000V (2 each) XR-H2 Magne-Grip

• CF = Crest Factor, Crest Factor = V peak

3. Function/Range Switch

Commutateur de gamme/ fonction Funktion/Bereich-Schalter Selettore funzione/portata Selector de la función y del rango

4. Test Lead Connections

6. Battery/Fuse Cover

• Product specifications

• Product manuals Please Recyle