True RMS Digital Multimeter
Contents
1. 83 F 18 C to 28 C and less than 70 RH 5 22 816 V1 8 7 02 Diode Test Continuity Check Temperature sensor Input Impedance AC Bandwidth Display Overrange indication Polarity Measurement Rate Auto Power Off Low Battery Indication Battery Fuses Operating Temperature Storage Temperature Relative Humidity Operating Altitude Weight Size Safety Test current of 0 3mA maximum open circuit voltage 1 5V DC typical Audible signal will sound if the resistance is less than approximately 300 test current lt 0 7mA Requires type K thermocouple 7 5MQ VDC and VAC 40 to 400Hz 4000 count backlit Liquid Crystal OL is displayed Automatic no indication for positive polarity Minus sign for negative polarity 2 times per second nominal Meter automatically shuts down after 15 minutes of inactivity BAT is displayed if battery voltage drops below operating voltage One 9V battery NEDA 1604 IEC 6F22 mA uA and Temperature ranges 0 5A 250V fast blow 10A range 10A 250V fast blow 32 F to 122 F 0 C to 50 C 4 F to 140 F 20 C to 60 C lt 70 operating lt 80 storage 7000ft 2000 meters maximum 7 oz 200g 6 x 3 x 1 75 15 25x 7 6x 4 45cm For indoor use and in accordance with the requirements for double insulation to IEC1010 1 1995 EN61010 1 1995 Overvoltage Category Ill 6 22 816 V1 8 7 02 Meter Description Liquid Crystal Display Range but2. fuse of the proper size and value 0 5A 250V fast blow or 10A 250V fast blow 8 Replace the cover and secure with the screws Ad DOUR A UL mark does not indicate that this product has been evaluated for the accuracy of its readings 14 22 816 V1 8 7 02 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on 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 at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product
3. The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers complete repair and calibration services for all of the products we sell For periodic calibration NIST certification or repair of any Extech product call customer service for details on services available Extech recommends that calibration be performed on an annual basis to ensure calibration integrity T Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2002 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 15 22 816 V1 8 7 02
4. User s Guide EXTE INSTRUMENTS True RMS Digital Multimeter Model 22 816 Introduction Congratulations on your purchase of Extech s 22 816 true rms Digital Multimeter This autoranging meter measures AC DC Voltage AC DC Current Resistance Capacitance Frequency Duty Cycle Temperature Diode Test and Continuity Proper use and care of this meter will provide many years of reliable service Safety International Safety Symbols This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information N This symbol adjacent to a terminal indicates that under normal use hazardous voltages may be present Double insulation Overvoltage Catagory Ill This meter meets the IEC 610 1 95 standard for OVERVOLTAGE CATEGORY III Cat II meters are protected against overvoltage transients in fixed installation at the distribution level Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation 2 22 816 V1 8 7 02 Safety Precautions 1 Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter 2 Make sure any covers or battery doors are properly closed and secured 3 Always remove the test leads before replacing the battery or fuses 4 Inspect the condition of the test leads and t
5. d ambient conditions Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts Handle the meter gently Dropping it can damage the electronic parts or the case Keep the meter clean Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents Use only a fresh battery of the recommended size and type Remove the old or weak battery so it does not leak and damage the unit If the meter is to be stored for a long period of time the battery should be removed to prevent damage to the unit Battery Replacement 1 2 3 Disconnect the test leads from the meter Remove the rubber holster boot if in place Open the battery door by removing the screws using a Phillips head screwdriver SES Insert the new battery into the battery holder observing the correct polarity Replace the battery door and secure with the O OO SCrews 13 22 816 V1 8 7 02 Fuse Replacement WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing battery fuse cover 1 Disconnect the test leads from any circuit being measured 2 Remove the rubber holster if in place 3 Open the battery fuse cover by removing the screws on the rear using a Phillips screwdriver Remove the battery cover Remove the old fuse by gently pulling up on it Install the new fuse by gently pushing it into the holder Always use a
6. digits 600V 1V 2 0 reading 4 digits DC Current 4001A 0 1uA oe ie 1 5 reading 3 digits 400mA 0 1mA 10A 0 01A 2 5 reading 5 digits AC Current 4004A O 1uA ean cue ss 1 8 reading 5 digits 400mA 0 1mA 10A 0 01A 3 0 reading 7 digits Resistance 4000 0 10 1 0 reading 4 digits 4kQ 0 001kQ 1 0 reading 2 digits 40kQ 0 01kQ 400kQ 0 1kQ 1 2 reading 2 digits 4MQ 0 001MQ 40MQ 0 01MQ 2 0 reading 5 digits 22 816 V1 8 7 02 Capacitance 4nF 0 001nF 5 0 reading 10digits 40nF 0 01nF 5 0 reading 7 digits 400nF 0 1nF 3 0 reading 5 digits 4uF 0 001 nF a ci 3 59 ding 5 digit 40uF 0 01uF 3 5 reading igits 200uF 0 1uF 5 0 reading 5 digits Frequency 9 999Hz 0 001Hz 1 5 reading 5 digits 99 99Hz 0 01Hz 999 9Hz 0 1Hz 9 999kHz 0 001kHz 99 99kHz 0 01kHz 999 9kHz 0 1kHz 9 999MHz 0 001MHz 1 5 reading 4 digits Sensitivity 0 8V rms min 20 to 80 duty cycle and lt 100kHz 5Vrms min 20 to 80 duty cycle and gt 100kHz Function Range Resolution Accuracy Duty Cycle 0 1 to 99 9 0 1 1 2 reading 2 digits Pulse width 100us 100ms Frequency 5Hz to 150kHz Temp F 4 to 1400 F 1 F 3 0 reading 3 digits Temp C 20 to 760 C 11 C meter only probe accuracy not included 1 2 reading 2 digits NOTE Accuracy is stated at 65 F to
7. e COM jack and the red test lead banana plug into the a Positive uA mA jack for currents to 400mA b Positive 10A jack for currents to 10A 2 Turn the rotary switch to the uA mA or A position Press the MODE button to select AC or DC current 4 Touch the test probes in series with the circuit under test and read the current on the display Note Pressing the Hz button while in the current function will switch the display to frequency or duty cycle ES 8 22 816 V1 8 7 02 Resistance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive Q jack 2 Turn the rotary switch to the Q position 3 Touch the test probes to the circuit or device under test and read the resistance on the display Capacitance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive CAP jack 2 Turn the rotary switch to the CAP position Touch the test probes to the circuit or device under test and read the capacitance on the display 9 22 816 V1 8 7 02 Frequency or Duty Cycle Measure
8. he meter itself for any damage before operating the meter Repair any damage before use 5 Do not exceed the maximum rated input limits 6 Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard 7 Always discharge capacitors and remove power from the device under test before performing Capacitance Diode Resistance or Continuity tests 8 Remove the battery from the meter if the meter is to be stored for long periods 9 To avoid electric shock do not measure AC current on any circuit whose voltage exceeds 250V AC 10 Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the electrical contacts Other means should be used to ensure that the terminals are not live Input Limits Function Maximum Input V DC VAC 1000V DC 600V AC Ohms Capacitance Diode 250V DC AC Frequency Continuity mA DC AC 400mA DC AC 10A DC AC 10A DC AC 30seconds max every 15 minutes 3 22 816 V1 8 7 02 Specifications Function Range Resolution Accuracy DC Voltage 400mV 0 1mV 0 5 reading 2 digits 4V 0 001V 40V 0 01V 1 0 reading 2 digits 400V 0 1V 600V 1V 1 5 reading 2 digits AC Voltage 400mV 0 1mV 1 0 reading 70 digits 50 60Hz 4V 0 001V 1 0 reading 3 digits pen wae 1 2 reading 3
9. ments 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive HZ jack Turn the rotary switch to the FREQ position Press the Hz button to select Hz or Touch the test probes to the circuit or under test and read the frequency or duty cycle on the display Continuity Measurements 1 w Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive Q jack Turn the rotary switch to the position Press the MODE button until appears in the display Touch the test probes to the circuit or device under test If the resistance is less than approximately 300 the buzzer will sound and the resistance appears on the display Note The meter automatically holds the 4000 range when continuity is selected Temperature Measurements 1 Insert the type K thermocouple probe black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive Temp jack Turn the rotary switch to the C or F position Read the temperature on the display 10 22 816 V1 8 7 02 Diode Measurements 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive diode jack 2 Turn the rotary switch to the gt t position 3 Press the MODE button until Dt appears in the display 4 Touch
10. sured value 4 Press the Relative button to return to normal operation Backlight The backlight function illuminates the display and is used when the ambient light to too low to permit viewing of the displayed readings Press the button for one second to turn the backlight on and press the button a second time to turn the backlight off Auto Off The auto off feature will turn the meter off after 15 minutes of inactivity Range switch or a button has not been turned or pressed A beep will warn the user shortly before the auto off feature activates Turn the Function switch to the OFF position and then to a function to resume operation True RMS The term stands for Root Mean Square which represents the method of calculation of the voltage or current value Average responding multimeters are calibrated to read correctly only on sine waves and they will read inaccurately on non sine wave or distorted signals True rms meters read accurately on either type of signal 12 22 816 V1 8 7 02 Maintenance WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery fuse cover WARNING To avoid electric shock do not operate your meter until the battery fuse cover is in place and fastened securely This Multimeter is designed to provide years of dependable service if the following care instructions are performed 1 2 6 Keep the meter dry Use and store the meter in mil
11. the test probes to the diode under test Forward voltage will indicate 0 4V to 0 7V Reverse voltage will indicate OL Shorted devices will indicate near OmV and an open device will indicate OL in both polarities Red Black Black Red Probe Probe Probe Probe AGA AA Forward test Reverse test Manual Ranging The meter turns on in the autoranging mode Press the Range button to go to manual ranging Each press of the range button will step to the next range as indicated by the units and decimal point location Press and hold the Range button for two seconds to return to autoranging Manual ranging does not function in the Capacitance Frequency and Temperature functions Data Hold Press the Data Hold button to freeze the reading in the display HOLD will appear in the LCD Press the button again to release the display 11 22 816 V1 8 7 02 Relative Measurements The relative measurement feature allows you to make measurements relative to a stored reference value A reference voltage current etc can be stored and measurements made in comparison to that value The displayed value is the difference between the reference value and the measured value 1 Perform any measurement as described in the operating instructions 2 Press the Relative button to store the reading in the display and the REL indicator will appear on the display 3 The display will now indicate the difference between the stored value and the mea
12. ton Hz Duty Cycle button Mode button Rotary Function switch COM jack 10A Current jack Hold button Relative button Backlite button Positive input jack NO dl BWP gt Ba OD ND BR Na O Note Tilt stand fuse and battery compartment are on rear of unit Symbols AC Alternating current or voltage DC Direct current or voltage Continuity Diode test mV V millivolt volt voltage O KO MQ ohm kilohm megohm resistance HA mA A microamp milliamp Amp current nF uF nanofarad microfarad capacitance Hz kHz hertz kilohertz frequency duty cycle F C Degrees Fahrenheit Centigrade temperature AUTO Autorange BAT Low battery HOLD Display hold REL Relative 7 22 816 V1 8 7 02 Operating Instructions AC or DC Voltage Measurements 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack 2 Turn the rotary switch to the VAC or VDC position J 3 Touch the test probes to the circuit under test and read the voltage on the display Note Pressing the Hz button while in the voltaget V function will switch the display to frequency or duty cycle AC or DC Current Measurements CAUTION Do not make current measurements on the 10A scale for longer than 30 seconds every 15 minutes Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negativ
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