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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.
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.
Req = 1
1 + 1 + 1
R1 R2 R3
Req = 1
1 + 1 + 1
680 470 540
CARE AND MAINTENANCE
Attempting to modify or tamper with
the caclulator’s interal components
can cause a malfunction and invali-
date the warranty.
Display
0.001470588
0.003598247
0.005450 100
183.4828833
680 [2ndF] [1/x ] [+]
470 [2ndF] [1/x ] [+]
540 [2ndF] [1/x ] [=]
[1/x ]
Press
32 33