ACR Electronics SmartReader Plus Instrukcja Użytkownika Pobierz pdf (Strona 54)

SmartReader Data Loggers

while the resistors that are 1% or better have five rings or four number digits. In the case of

1% values the first three digits or rings correspond to the resistors value and the fourth digit or

band is the number of zeros to be added. The fifth band or letter indicates the manufacturer's

tolerance of the resistor. For example, a 30,900 ohms resistor would be shown as orange,

black, white, red, black or "3092F".

Color

Number

Tolerance

Letter

Black

Brown

Red

Orange

Yellow

Green

Blue

Violet

Grey

White

Gold

Silver

10%

None

20%

WARNING: Using resistors with tolerances looser than 1%, poor temperature

coefficients and long-term drift characteristics will create undesirable

measurement errors.

1.9.5 External Battery Control

You can activate a special switch on the SmartReader 7 designed to optimize the use of

battery-powered sensors while out in the field. The battery-saving contacts can provide

switching capability to draw power from the battery only when needed, thus maximizing its life

for extended field applications.

The battery switch allows you to power external transducers with a separate battery pack.

This capability makes it easy for you to assemble your own self-contained data logging kit for

long-term in-field use where there is no convenient power supply receptacle.

The battery switch is enabled in TrendReader software. The switch works by closing eight

seconds prior to a reading, remaining closed until the reading is taken, then immediately

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ACR Electronics SmartReader Plus Instrukcja Użytkownika Strona 54