Instruction/ maintenance manual of the product EC-252 Radio Shack
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Cat. No. 65-53 8 OWNER’S MANUAL Please read befo re using this equi pment. EC-252 Metric Conversion Calcul at or 65-538.fm P age 1 Monday, December 13, 1999 9:15 AM.
2 INTRODUCTION Your EC-25 2 Metric Conv ersion Cal culator conveni ently c ombines an i nternal battery and a s olar pan el, s o you c an use the cal - culator anywhere . It als o has a three-key memo ry system so y ou can ad d, subtract , and recall a ca lc ula t ed figu re.
3 KEYS AND FUNCT IONS — Converts sta ndard to metri c mea- surem ents. — Converts met ric to sta ndard mea- surem ents. +/– ( °F °C ) — Changes a dis played numbe r from pos itive to negati ve and vic e versa. Also converts Fahrenhei t to Celsiu s and vice ve rsa.
4 ÷ ( acre m 2 ) — Performs t he division function . Also converts acre s to square mete rs and vi ce versa . ON/C — Turns on p ower. Also clears t he las t entr y when pres sed on ce and clea rs the w hole calcul atio n whe n pres sed tw i ce. 7 ( in cm ) — Enters 7 .
5 4 ( in 2 cm 2 ) — Enters 4 . Also convert s square inches to square c entimet ers and vice ve rsa. 5 ( ft 2 m 2 ) — Enters 5 . Also c onverts square fee t to squ are meters a nd vice v er- sa. 6 ( mi le 2 km 2 ) — Enters 6 . Also c onverts squar e miles to squ are kil ometer s and vice versa .
6 3 ( ga l l ) — Enters 3 . Also converts US gallons to lite rs and vi ce versa . M+ ( yard m ) — Adds and s tores a c al- culation answer in memory. Also co nverts yard s to mete rs and vi ce ver sa. 0 ( oz g ) — Enters 0 . Also conv erts ounce s to gram s and vi ce ver sa.
7 OPERATION T URNING ON THE EC-252 Pre ss ON/C to turn on the ca lculator. Notes: • The cal culator turn s of f automati cally if you do n ot press any key wit hin abo ut 1 1 minutes. • When y ou tu rn the ca lculator of f, previ- ous ent ries are cl eare d.
8 To clear the di splay for a ne w calculat ion, press ON /C twice. 0. appears, th en begin the ne w calcula tion. If yo u pres s an inco rrec t opera tor key ( + , – , × × × × , ÷ ), si mply p ress the c orre ct key and con- tinue yo ur calcul ation.
9 Estimating Cal culat ion Results If you perform a calcu lation that results i n an ov erfl ow err or , you ca n est imate the co r- rect result (to 8 s ignific ant digits ) by follow- ing th ese s teps. 1. Count the number of digits dis played to the l eft of the d ecimal p oint.
10 USING THE +/– KEY Press +/– to ch ange the dis played va lue from positi ve to negativ e or from negat ive to positive . Note: MINUS - appears fo r a negative value . CALCULATION EXAMP LES Basic Y o u Press Y ou See 256 + 3 78 = 634. 471 – 223 = 248.
11 Constants For multip lication , the first v alue you enter is the cons tant. For a ddition, subtracti on, and divisio n, the sec ond value you ent er is the constan t. 36 – 60. 75 × MINUS – 15. 8 ÷ MINUS – 120. 9 = MINUS – 13.333333 Y o u Press Y ou See 5 × × × × 7 = 35.
12 Percentage Example: 20% of 720 is 144 . Add-On Example: 3 0% add ed to 540 i s 702. 200 = 40. 300 = 60. Y ou Press Y ou See 720 × 20 % 144 Y ou Pre ss Y ou See 540 + 3 0 % 702.
13 Discount Exam ple: 800 di scounted by 20 % is 640. Reciprocal Exam ple: 1 / 8 = 0.125 Exponent Exam ple: 7 6 = 1176 49 Y ou Pres s Y ou S ee 800 – 20 % 640.
14 MEMORY CALCULATIO NS To st ore a value in mem ory, first press MRC (mem ory recal l/clear) twice t o clear the mem ory, then pre ss ON/C to cl ear all calcula tions . To add a value to memo ry, enter the num - ber or cal culation you wa nt to add, then press M+ .
15 To recall the valu e from memo ry, press MRC once. The m emory va lue appea rs. To clea r the conte nts in mem ory, p ress MRC twice so MEMORY di sappears . Exam ple: 2392 + 576 ————— – 73 = –64.6 1582 786 – 43 2 Y o u Pr es s Y o u Se e MRC MRC ON/C 0.
16 CONVERSION and let you sel ect the convers ion di- rection — to me tric or from metric . The symbo ls ab ove each key show y ou whi ch convers ion each ke y makes. For examp le, in cm is printed above 7 . To conver t 12 inches into cen timete rs, press 12 7 .
17 Length Exampl e: 5.5 cm = ? in Exampl e: 7 5 / 8 in = ? cm Exampl e: 12.8 m = ? ft Y o u Pres s Y ou See 5.5 in cm (7) 2.1653543 Yo u P r e s s Yo u S e e 5 ÷ 8 + 7 = in cm ( 7) 19.
18 Exam ple : 54 yd = ? m Wei ght Example: 630 lb = ? kg Example: 1 lb = ? k g Y ou Press Y ou See 54 yard m ( M+) 49.3776 Y ou Press Y ou See 630 lb kg (.
19 Vo l u m e Exampl e: 389 ft 3 = ? m 3 Exampl e: 100 ml = ? (US) fl. oz Exampl e: 245 (US) ga l = ? l Yo u P r e s s Yo u S e e 389 ft 3 m 3 (2) 11.015313 Y o u Pres s Y ou See 100 fl. ml (–) 3.3813484 Yo u P r e s s Yo u S e e 245 g al l ( 3) 927.
20 T emperature Example: 125°F = ? °C Example: –35°C = ? °F Area Example: 245 ft 2 = ? m 2 Y ou Press Y ou See 125 °F °C ( +/– ) 51.666666 Y ou Press Y ou See 35 +/- °F °C ( +/– ) MINUS - 31. Y ou Press Y ou See 245 ft 2 m 2 ( 5 ) 22.7605 65-538.
21 Exampl e: 1540 c m 2 = ? ft 2 Yo u P r e s s Yo u S e e 1540 in 2 cm 2 ( 4 ) 238.70047 65-538.fm P age 21 Monday, December 13 , 1999 9:15 AM.
22 CARE T o enjoy your EC -252 Metric Conversion Calculato r for a l ong time: • Keep t he calc ulator dry . If it gets wet, wipe it dry imme diately . • Use and s tore the calcu lator on ly in normal te mperat ure environm ents. • Handle the calcula tor gently and care- fully .
23 REPLACING THE BATTERY Alth oug h your ca lcula tor us es sol ar p ower most of the tim e, the backup bat tery will even tual ly beco me we ak and need r eplac - ing. If the disp lay spee d slows do wn in a dimly -lit room, rep lace the batte ry with a 389A -type button-c ell batt ery (Rad ioShack Cat.
24 2. Caref ully in sert a smal l, flat-blade screwdriver betwe en the lower case halves, then sl ightly twi st the s crew- driver to separat e the l ower front and back ca se hal ves. 3. Use a screwdriver to gen tly pry out the old batter y . Wa r n i n g : Keep th e battery out of reach of ch ildren.
25 • Dispos e of the old b attery pr omptly and prop erly . Do not burn or b ury it. 4. Posi tion the new batte ry so the posi- tive (+ ) side is up, then insert it into the batt ery co mp artm ent . 5. Snap the front a nd back case halves back tog ether , then replace the screws .
26 SPEC IFIC ATIONS Display .... ................. ........... ... 8-Digit LCD Sola r Cell Minimum Illumi nation ................ .. 150 LUX Battery ................... O ne 389A Button -Cell (Cat. No. 23-1 17) Battery Lif e .................... .....
27 Limited O ne-Y ear W arranty Thi s pr oduct is wa rrant ed by Rad ioSha ck ag ainst manu- facturi ng defects in m at er i al and w o rkman shi p unde r n or- mal us e for o ne (1) yea r from t he dat e of purc hase f rom RadioSh ack c ompan y-owned stores and author ized Ra- dioSha ck franchi sees and dealer s.
RadioSha ck A Division of T andy Corporat ion Fort Worth, T e xas 76102 07A99 Printed in China ( Continued ) become the p roper ty of Radio Shac k. New or rec ondit ion ed part s and p roduc ts may be use d in th e per- forman ce of war ra nty s ervi ce.
An important point after buying a device Radio Shack EC-252 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Radio Shack EC-252 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Radio Shack EC-252 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Radio Shack EC-252 you will learn all the available features of the product, as well as information on its operation. The information that you get Radio Shack EC-252 will certainly help you make a decision on the purchase.
If you already are a holder of Radio Shack EC-252, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Radio Shack EC-252.
However, one of the most important roles played by the user manual is to help in solving problems with Radio Shack EC-252. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Radio Shack EC-252 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
