RadioShack Marine Instruments - Manual

6 Specifications ˆ Specifications RANGES AC/DC Voltage .......................................................................... 15V, 150V, 500V DC Current .............................................................................................. 150 mA AC Current .................................

7 A Quick Look at Your Multimeter ˆ A Quick Look at Your Multimeter OHMSADJUST(left side of AC AMMETER MULTIMETER multimeter) Ω OHM S

8 Preparation ˆ Preparation INSTALLING A BATTERY Your multimeter requires one AAAbattery (not supplied) for power. Forthe best performance and longest life,we recommend a RadioShack alka-line battery. Warnings: • To avoid electrical shock, discon- nect both of the multimeter’s testleads from any equ...

10 Using the Multimeter 3. Use the screw to secure the ammeter to the multimeter, thenput the top cover you removed inStep 1 in a safe place. ZERO ADJUSTMENT If the needle does not normally restexactly over 0 on the left side of theACVA/DCVA scale, use a flat screw-driver to adjust the plastic screw...

12 Using the Multimeter to 2, the AC or DC voltage is100 volts (2 × 50 = 100V). • If the function selector is set to 15 DCV , read the lower line of ACVA/DCVA on the multime-ter then multiply the readingyou see by 5. For example, ifthe needle points to 2, the DCvoltage is 10 volts (2 × 5 = 10V). • I...

13 Using the Multimeter Measuring AC Voltage Riding on a DC Source Bias To measure AC voltage superim-posed on a DC voltage source biaswhile ignoring the DC voltage, youmust first measure the AC and DCvoltages separately, then computethe peak voltage using this formula: Peak voltage = DC voltage + A...

15 Using the Multimeter 4. Hold down the trigger lever on the ammeter. The ammeter’sjaws open. Then insert the wireyou are measuring inside theprobe's jaws and release the trig-ger lever. 5. Slide T/3A/15A/30A on the amme- ter to 3A , 15A , or 30A (to measure current). Note: If you are not sure abou...

16 Using the Multimeter MEASURING WATTAGE You can use the multimeter and am-meter to tell how many watts of poweran appliance uses. This helps you de-termine what the electricity costs arefor that appliance. The following formula can help youmake the necessary conversion. V (volts) × A (amps) = W (w...

17 Care • If the function selector is set to R ×××× 1K Ω , multiply that reading by 1000 to compute the resistance.For example, if the needle pointsto 1, the resistance is 1000 ohms(1 × 1000 = 1000 Ω ). Hint: If you are identifying cathodeand anode ends or the type of transis-tor (PNP or NPN), the a...

18 Care REPLACING THE FUSE If the multimeter does not work, youmight need to replace the fuse withthe supplied 315 mA, 250V ceramicfuse. The spare fuse is next to thebattery compartment. Caution: Do not use a fuse with rat-ings other than those specified here.Doing so might damage your multim-eter. ...

22-602 01A01 Printed in China RadioShack CorporationFort Worth, Texas 76102 Limited Ninety-Day Warranty This product is warranted by RadioShack against manufacturing defects in material and work-manship under normal use for ninety (90) days from the date of purchase from RadioShack com-pany-owned st...