Duoyi DY219 Manuale operativo - Pagina 4

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(4) Check the insulating layer of the clamps before measuring. Damage,

bareness and disconnection are unacceptable. It is forbidden to use without

covering the rear cover correctly, which can cause electric shock.

(5) Do not use or store the tester in the condition of high temperature, high

humidity, combustibility, explosion and strong electromagnetic field.

(6) Do not change the internal circuit at will in order to avoid damaging the

tester and keep safe.

(7) Wear proper eye mask when testing or repairing in order to avoid some

objects hitting eyes by the engine.

(8) Make sure ventilation when testing or repairing in order to avoid smelling

some toxic gas.

(9) When the engine is working, do not put the tester or accessories beside

the engine or exhaust pipe in order to avoid damaged by high temperature.

(10) Pay attention to the precautions and maintenance procedure of the

manufacturer during repairing.

(11)Standard of optional storage battery:

Accurate Test

CCA: 100-1700

I E C: 100-1000

E N : 100-1700

D I N: 100-1000

J I S: need to compare CCA with the table

3.International Electric Symbol

high voltage(electric shock)

Quick Test

3Ah-250Ah

DC/AC

warning

earth

double insulation

fuse

battery

water), on the contrary shorten its life fast for the reason that it will increase

the acidity of battery water, not the voltage however.

8-3 some common abbreviation definition of storage

battery standard

★ RC－Reserve Capacity

Every storage battery has the ability to load averagely 25A electric

perminute and maintains lowest 10.5V more or less in the situation of

80°F(27°C).

★ CCA－Cold Cranking Ampere

With the fixed current, every battery can be cooled in the situation of

0°F（-18°C）~ -20°F（-29°C）for 30 seconds and maintain the lowest

voltage of 7.2V. The unit of CCA is Ampere. For some vehicles, especially

long time used ones, it is hard to start the engine smoothly, and has to be

done twice or for some seconds. Actually the electricity consumes most

when starting the engine. The voltage drops off from the normal value 12.5V

to 10.5V even lower at the moment that large current discharge shortly. The

large CCA is very helpful to start the engine smoothly.

★ CA－Cranking Ampere

The main meaning is very close to that of CCA. The unit is Ampere also.

The temperature under testing is the only one difference between them. CCA

refers to the result that measured under -17.8°C, and CA refers to the result

that measured under 0°C. If there indicates both CCA and CA on the battery,

CCA value is lower for the reason that the lower temperature is, the worse

battery works.

★ AH－Ampere Hour

This is a standard written by Japanese Industrial Standard (JIS). It is

explained that the battery discharges with a fixed ampere for 20 hours along

with over 10.5V. Therefore the value multiplied by a fixed ampere and the

number of hour is Ampere Hour. For example a battery discharges with 5

ampere fixed for 20 hours, its Ampere Hour is 100.