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Thank you for purchasing your ����ang�� �� ���
RadioShack. Th�� m��t��r m��asur��s voltag��, curr��nt, r��sistanc��, capacitanc��, and
frequency. It's ideally suited for field, lab, shop, and home applications. You can also
conn��ct th�� m��t��r to your comput��r and us�� th�� suppli��d softwar�� to log and graph
measurements. Please read this user's guide before installing, setting up, and using your
n��w multim��t��r.
What's Included
Digital Multimeter
Rubber Boot
Fuse F12A/250V (2)
46-Range • PC Interface
Digital Multimeter
����ang�� �� ��� int��rfac�� Digital Multim��t��r from
Test Leads (2)
CD-ROM
User's Guide
www.radioshack.com
RS-232 Cable
Fuse F500mA/250V (2)
22-812A
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Summary of Contents for Radio Shack 22-812A
- Page 1 22-812A 46-Range • PC Interface Digital Multimeter Thank you for purchasing your ����ang�� �� ��� ����ang�� �� ��� int��rfac�� Digital Multim��t��r from RadioShack. Th�� m��t��r m��asur��s voltag��, curr��nt, r��sistanc��, capacitanc��, and frequency. It’s ideally suited for field, lab, shop, and home applications. You can also conn��ct th��...
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Page 2: Table Of Contents
Contents Safety Precautions ................4 Special Panel Markings ..................5 Care and Maintenance ..................5 A Quick Look at Your Meter ............... 6 Preparation ..................8 Installing the Battery .....................8 Replacing the Fuses ....................8 Basic Operation and Features ............9 Testing the Display ....................9 6-26-07 6-26-07 Using the Stand .....................9... - Page 3 Contents Using the Meter With a Computer ........... 18 System Requirement ..................18 Installing the Meter’s Software/Hardware ............. 18 Configuring/Using the Meter and Software ............ 18 Specifications ................. 20...
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Page 4: Safety Precautions
Safety Precautions Read and follow these safety precautions. • �e�er apply �oltages to the meter that e�ceed the limits gi�en in the �e�er apply �oltages to the meter that e�ceed the limits gi�en in the specifications. Never apply more than 1000V DC or 750V RMS AC between the input jacks and ground. -
Page 5: Special Panel Markings
Safety Precautions This meter is fully calibrated and tested. Under normal use, no further adjustment should be necessary. if the meter requires repair, do not try to adjust it yourself. Take it to your local RadioShack store. Special Panel Markings CAUTION: Risk of electric shock! Refer to the complete operating instructions. -
Page 6: A Quick Look At Your Meter
A Quick Look at Your Meter AUTO - Appears in the auto range mode. The meter automatically enters the auto range mode when you turn it on. ºC/ºF/ V – Displays temperature / measures DC �olts. dBm / V – Measures AC �oltage in dBm or �olts. / µA/A –... - Page 7 SELECT – press to toggle measurement options within a function. RANGE – Selects auto or manual ranging. press to enter the manual range mode and press to select different ranges. hold down about 2 seconds to e�it the manual range mode. HOLD –...
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Page 8: Preparation
Preparations Installing the Battery Your meter requires one 9V battery (not supplied) for power. when appears or the meter stops operating properly, replace the battery. 1. Remo�e the rubber boot if it is attached. 2. Turn off your meter. Loosen the screw and remo�e the off your meter. -
Page 9: Basic Operation And Features
Basic Operation and Features For the most accurate reading, the temperature should be between 65º and 83ºF (18º and 28ºC), with a maximum of 75% relative humidity. Testing the Display To test the meter’s display, turn off the meter, then hold down HOLD while turning on the meter. -
Page 10: Using Monitor
Basic Operation and Features Using Monitor The meter’s monitor feature displays the minimum or ma�imum �alue measured and stores those �alues. if the meter measures a �alue higher than the stored ma�imum �alue or lower than the stored minimum �alue, it updates the stored �alue with the new �alue. -
Page 11: Taking Measurements
Taking Measurements Taking Relative Measurement The meter allows you to take measurements with zero offset or other values as reference using the REL button Use zero offset as reference 1. Set the meter to any function e�cept ºC/ºF, dBm, , , LOGIC, or 2. -
Page 12: Measuring Dc/Ac Voltage
Taking Measurements Measuring DC/AC Voltage WARNING: Do �OT try to measure a DC �oltage abo�e 1000 �olts or an AC voltage above 750 volts RMS, and never clamp a test lead to a hot wire (usually red, black, or blue in AC wiring circuits). if one lead is clamped to a hot wire and you touch the meter’s other probe, you could recei�e an electric shock. -
Page 13: Measuring Resistance
Taking Measurements 1. Rotate the function dial to /µA/A for 0.4/4mA and 4/10A ranges or /mA/A for 40/400mA and 4/10A ranges, and press SELECT to measure AC current (~ appears) or DC current (~ disappears). (~ disappears). . 2. power off the circuit under test and discharge all capacitors. 3. -
Page 14: Measuring Capacitance
Taking Measurements Measuring Capacitance The capacitance measuring circuit in your meter charges a connected capacitor to a specific voltage level, then discharges the capacitor to a lower voltage. The meter measures the amount of time it takes to discharge the capacitor. 1. -
Page 15: Checking Diodes
Taking Measurements Checking Diodes You can check diodes, transistors, and other semiconductors for opens, shorts, and normal operation, and determine the forward �oltage and polarity for diodes. You can also check LeDs. 1. power off the circuit under test and discharge all capacitors. 2. -
Page 16: Measuring Frequency/Duty Cycle/Pulse Width
Taking Measurements Measuring Frequency/Duty Cycle/Pulse Width The meter can measure fre�uency from 10 Hz to 4 MHz and duty cycle and pulse width with a signal fre�uency from 10 Hz to 100 kHz. The amplitude of the signal should not be larger than 10V peak. 1. -
Page 17: Measuring Hfe
Taking Measurements Notes: • if the function dial is set to dBm / V and you want to set the meter for ma�imum sensiti�ity when measuring a new signal, press SELECT to select the ACV function then press Hz/DUTY/WIDTH to select the frequency function. •... - Page 18 Using the Meter With a Computer You can connect your meter to a computer, letting you con�eniently monitor, record, and log data o�er a long period of time. You can e�en use your meter to display oscilloscope information on your computer. For e�ample, you can record changes in temperature in a refrigerator or �oltage changes in a circuit o�er a long period of time.
- Page 19 Using the Meter With a Computer 4. Then click the icon Then click the icon Then click the icon click the icon , or pull down Run then click Start to set up the meter set up the meter to work with your computer. Data is transmitted from your meter to your computer.
- Page 20 Specifications Accuracies at 73.4ºF (23ºC) ±5º, <75% RH DC VOLTS (Ma�imum Measurement: 1000V) 400mV ................± 0.3% of Reading, ± 4 in Last Digit 4V to 40V ..............± 0.3% of Reading, ± 3 in Last Digit 400V ................± 0.5% of Reading, ± 3 in Last Digit 1000V ................
- Page 21 Specifications K-TEMpERATURE MODE This is a special �oltage mode, to be used with an optional thermocouple module that can be attached to the meter. This mode automatically con�erts the 1mV per °C or °F �oltage into a readout that appears as a temperature. �n these modes, the unit can show up to ± 999°C or °F.
- Page 22 Specifications DIODE MODE Open Circuit Voltage ....................< 2.8Vdc Test Current 1 mA Typical ........................LOGIC MODE Min. high-Le�el Voltage ..................2.0V ± 0.2V Ma�. Low-Le�el Voltage ..................1.0V ± 0.2V CONTINUITY BEEpER Continuity (short) ..................≤� 50 ± 30 Ohms Open ......................
- Page 23 Notes: 6-26-07...
- Page 24 RadioShack Customer Relations 300 RadioShack Circle Fort Worth, TX 7�102 04/04 www.radioshack.com protect the en�ironment by recycling used electronics. Go to www.ecyclingcentral.com to find a recycing location near you. Windows is a registered trademark of Microsoft Corporation in the United States and/or other 04A08 countries. 22-812A AO0069AeA1 ©2008. RadioShack Corporation. printed in China All rights reserved. RadioShack and RadioShack.com are trademarks used by RadioShack Corporation.
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