PARALLEL RESISTANCE
Three resistors are connected in par- allel. Their values are 540 ohms, 470 ohms and 680 ohms.
Calculate the total equivalent resist- ance.
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Req = |
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| 680 |
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| 540 |
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| Press |
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| Display | ||||
| 680 [2ndF] | [1/x ] [+] |
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| 0.001470588 | |||||||||
| 470 [2ndF] | [1/x ] [+] |
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| 0.003598247 | |||||||||
| 540 [2ndF] | [1/x ] [=] |
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| 0.005450 100 | ||||||||||
| [1/x ] |
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| 183.4828833 | ||||
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CARE AND MAINTENANCE
Attempting to modify or tamper with the caclulator’s interal components can cause a malfunction and invali- date the warranty.
REPLACING THE BATTERIES
This calculator is powered by two internal batteries LR 44 or A76. If the display gets dim or calculations slow down the batteries should be replaced.
To replace the batteries:
1.Remove the six screws on the back of the calculator and lift off the back cover.
2.Replace the two batteries located near the tip of the calculator with new batteries following the polarity shown in the illustra- tion.
3.Replace the back cover and screws.
BATTERY PRECAUTIONS
1.Only use the size and type of batteries specified.
2.Follow the correct polarity when installing the batteries. Reversed batter- ies can cause damage to the calculator.
3.If the calculator is not going to be used for a long period of time, remove the bat- teries to prevent the damage or injury from possible battery leakage.
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