Datexx DS-700-30Xa owner manual Electronics, Replacing the Battery

Mode	Press		Display
DEG	0	[INV][x<–>m] 0
	6	[÷]	6
	15 [=]		0.4
	[INV] [sin–1]		23.57817848
	[Min]		M 23.57817848
	90 [–] [MR] [=] M 66.42182152

0[INV][x<–>m]23.57817848

23.58[cos] 0.916502421

[×] 15 [=] 13.74753633

ELECTRONICS

AMPLIFIER GAIN

Vi = 1mV V0 = 3V

Calculate the value of Av

Voltage gain Av = 20 log Vo/Vi

3

= 20 log 1 × 10–3 = 69.54242509 dB

Press	Display
3 [÷] [EXP] 3 [+/–]	1. –03
[=] [log] [×]	3.477121255
20 [=]	69.54242509
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REPLACING THE BATTERY

If the calculator slows down when using the battery, the battery is weak and should be replaced.

1.Remove the 6 screws on the bottom panel and remove the panel.

2.Remove the old batteries.

3.Insert the new batteries

(Radio Shack type RS-389 Cat. No. 23-101) following the polarity of the old battery.

4.Replace the bottom panel and replace the screws.

Replacement Batteries

Radio

Shack Eveready Maxell

389A 189 LR1130

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