29
Switching on
Pressing one of the three keys (MODE, INPUT/OUTPUT, LEVEL)
turns on the tool.
After being turned on the tool remains in the same operation mode
as it was in before turning off.
Switching off
The tool can be turned off from any operation mode by pressing
consecutively the keys LEVEL and INPUT/OUTPUT. To turn the tool off
from the annulus pressure monitoring mode, press the key
INPUT/OUTPUT. The tool goes off automatically:
•
If none of the keys are pressed within a period of longer than
100 sec.;
•
If any malfunctions accompanied with displayed notes like
ERROR occur (in this case the tool goes off within a 20-second
period);
•
If the battery cell's voltage decreases down to 2.5 V.
•
In the last case all the information stored in the tool is saved,
but you should charge it in order to prevent a full discharge of
the battery cell (see Supplement 4).
5.3.6 Explosion-proofness of the device
Explosion-proofness of the device is provided by the type of
protection "intrinsically safe electric circuit" “ib” level, according to the
requirements of GOST 31610.11-2014 (IEC 60079-11:2011), which is
achieved by the following:
Basic circuit diagram includes the protective component
“Fib”.
The protective component “Fib” is an intact spark protection unit
with the short-circuit current limitation at 2.25 A (maximum), using
current limiting resistors and semiconductor fuses in series. Double
redundancy is used in the “Fib” protective component to ensure greater
reliability. The “Fib” component is integrated into the battery compartment
Summary of Contents for SUDOS-mini 2
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