Counts CO-500M 12 Digits Desktop Calculator User Guide

112 STEPS CHECK & CORRECT ELECTRONIC CALCULATOR

POWER SUPPLY

Check & Correct calculator model has 2 power source; high solar power + Back- up baltery. and can operate under any lighting condillons. In normal lighting condition. the unit is powered by solar-cell and when isin too low lighting condition its power source automatically changes to built-in backup battery.

KEY EXPLANATIONS

| To power on theunit. or all clear key.
Memory plus key.
Memory minus key.
Memory recall or clear key.
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| Right shift key to deleta last-entered digit.
Mark up key.
Step by step check key (a→b→c=d)
Step by step check key (a←b←c=d)
Correction key
Auto Replay key. .
Grand total key.
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SWITCH DESCRIPTION

• (TAB- A)
  SELECTION OF DECIMAL MODE
   Rounding up
  Rounding off
  Rounding down

CUT: cuts off the decimal digits (depends on the ° TAB-B * sottong)
UP: Rounding up

• ( TAB -B) 5/4: Rounding off
  SELECTION OF DECIMAL DIGITS

•  This switch is for selecting the eftective decimal” digits

• F:Floating decimeal point
  4.2.0 indicates4.2 or 0 decimal

•  A(ADD2):
  When the switch is setto “A”. this Indicates that the decimal digit is automatically set to 2 (forexample: if you key in “8”. the value is 0. 08) but if youkey in ,then this position Is the base (This mode useless for multiplication and divison)

• Everytimeyou press the key.the value on the display is addeDinto Example: 123

•  “ERROR ” sign
  The display showns ” ERROR ” when the answer exceeds rhe maximum number of digits of display.
  1 Press to clear all values.
  2 Press the   keytoclearthe “ERROR” but the value on the display is still can effective, are stillsrored.

OPERATION EXAMPLES

Note

i) If the unit has a 99-step replay memory capacity which is useful to check each process of the calculation. and If there is a mis-input found .it can be corrected.
ii)lf the calculation becomes more than 99 steps. it is indicated in display by flashing 99 on the left side of L.C.D.F urther calculation can be continued but not stored in replay memory:

1. Check and Correct function

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