USER GUIDE Pen Multimeter with Voltage Detector Model 381676A
Introduction Thank you for selecting the Extech Model 381676A. This instrument measures AC/DC Voltage and Current, Resistance, Diode, Continuity, Logic, and includes a non‐contact Voltage Detector (NCV). Features include MAX Hold, Data Hold, Automatic Power OFF (APO), and Auto/Manual Range. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit the Extech Instruments website (www.extech.
Safety Symbols This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter. This symbol indicates that a device is protected throughout by double insulation or reinforced insulation. This symbol advises the user that the terminal(s) so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds 600V.
Button Descriptions Button Overview BUTTON MODE DESCRIPTION H (Data Hold) Any Mode Press to hold a reading on the display. Press and hold while turning the meter on to defeat APO R (Range) V, A, Press to Manually Range.
Test Lead Notes The supplied black test leads (standard test lead and alligator clip probe) have protective plugs that must be removed before being inserted in the bottom of the meter. This protective apparatus must be removed from the end of the lead that plugs into the meter. The positive (+) red probe cover is used when making Category III or higher measurements. Twist to remove this probe cover when making Category II or lower measurements.
Operating Instructions WARNING: Risk of electrocution. High‐voltage circuits, both AC and DC, are very dangerous and should be measured with great care. NOTE: On some low AC and DC voltage ranges, with the test leads not connected to a device, the display may show a random, changing reading. This is normal and is caused by the high‐ input sensitivity. Readings will stabilize and give proper measurement when test leads are connected to a circuit.
AC and DC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution for AC Measurements. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading may show 0 volts when the outlet actually has voltage present. Make sure the probe tips are touching the metal contacts inside the outlet before determining that no voltage is present.
AC and DC CURRENT MEASUREMENTS WARNING: Risk of electric shock. To prevent damage to the meter or personal injury, never measure current where open circuit voltages exceed 250V. NOTE: ‘OL’ indicates an over‐range condition in manual mode. A higher range should then be selected. 1. Use the probe cover if making measurements on category III or above installations 2. Set the function dial to the mA position. 3. Use the Mode (M) button to select AC or DC.
RESISTANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements. NOTES: ‘OL’ indicates an over‐range condition in manual mode. A higher range should then be selected. If the resistance measured is greater than 1M, the meter may take a few seconds to obtain a stable reading. This is normal for high resistance measurements.
LOGIC TEST WARNING: To prevent electric shock and damage to the meter or personal injury, do not measure voltages that may exceed 100V AC rms. NOTE: If the test leads are disconnected or if the voltage measured is < 1.5V the LED will be green. 1. 2. 3. 4. 5. 6. 7. 8. Use the probe cover if making measurements on category III or above installations Set the function switch to the LOGIC position. Insert the black test lead banana plug into the negative (common) jack at the bottom of the meter.
Battery Replacement WARNING: To avoid electrical shock, disconnect the test leads from any source of voltage before removing the battery cover. Do not operate meter unless the batteries are in place. 1. 2. 3. 4. 5. 6. 7. The icon will appear when battery voltage is low. Turn the Function dial to the OFF position. Disconnect the negative (common) test lead from the meter. Remove the Phillips head screw at the rear center of the meter housing. Remove the battery compartment cover to access the batteries.
Specifications Function Range Resolution Accuracy NCV DC Voltage 50~600V NA 200mV 0.1mV 2.000V 1mV 20V 0.01V (0.7% reading + 2 digits) 200V 0.1V 600V 1V Input Impedance: 10M Overload protection: 200mV range: 250VDC or AC rms; 2V~600V ranges: 600VDC or AC rms Max. input voltage 600V DC AC Voltage 200mV 0.1V 2.000V 1mV (0.8% reading + 3 digits) 20V 0.01V 200V 0.1V 600V 1V (1.
General Specifications Display 2000 count (0 to 1999) LCD Ranging Automatic and Manual Over‐range indication ‘OL’ is displayed Auto Power Off After 15 minutes (approx.) of inactivity Polarity Automatic (no indication for positive readings) Minus (‐) sign for negative readings. Measurement Rate Approx. 2 times per second Max.
Warranty FLIR Systems, Inc. warrants this Extech Instruments brand device to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department for authorization. Visit the website www.extech.com for contact information.
Garantie FLIR Systems, Inc. garantit que cet appareil Extech Instruments est exempt de défauts matériaux et de fabrication pendant un an à partir de la date d’envoi (une garantie limitée de six mois s’applique aux capteurs et aux câbles). Si le renvoi de l’appareil pour réparation devient nécessaire durant ou après la période de garantie, contactez le service client pour autorisation. Pour obtenir les coordonnées, visitez le site Web suivant : www.extech.com.
Garantía FLIR Systems, Inc., garantiza este dispositivo marca Extech Instruments para estar libre de defectos en partes o mano de obra durante un año a partir de la fecha de embarque (se aplica una garantía limitada de seis meses para cables y sensores). Si fuera necesario regresar el instrumento para servicio durante o después del periodo de garantía, llame al Departamento de Servicio a Clientes para obtener autorización. Visite www.extech.com para Información de contacto.
