Kapat KARAT-520, Руководство по эксплуатации

Страница: 17 / 52

Sequence of parameters change mentioned above is called standard
display mode.
The present display mode is indicated on LCD on default in case of
flowmeter switching on. The sequence of parameters displaying is
given on figure 1.9.
In addition a mode of extended display precision can be indicated on
LCD. Extended display precision mode differs from standard mode
by other cumulative volume representation. Representation of in-
stantaneous flow rate and operating time is identical in both modes.
Cascade switching of mentioned modes allows to read the values of
cumulative volume from LCD with precision corresponding to speci-
fied metrological device characteristics (1.4 table), regardless of the
number of significant digits of displayed parameter.
Extended display precision mode is switched on by one of 2 methods:
n
By means of magnet application (not less than 3 seconds) to
selected place on a flowmeter nameplate (13 clause, figure 1.7)
under which magnetically operated sealed switch is located;
n
By means of long pressing (not less than 3 seconds) of settings dis-
play button (9 clause, figure 1.7) in case of uncovered EM of
flowmeter.
Figure 1.9 – Parameters indicated on LCD during standard
displayed mode
*
— is indicated only in case of nonzero value
Operating time
Cumulative reverse volume*
Instantaneous flow rate
Set
h
3
m
3
m /h
Cumulative forward volume
3–4
sec
3
4
sec
–
3
4
sec
–
Warning!
Parameters displayed on LCD are indicated accurate to 7 signifi-
cant digits (characters). Eighth digit is used for indication of display
modes.
Note!
In case of settings button pressing or magnet application all “arrow”
indicators are simultaneously displayed on LCD (figure 1.8).
СМАФ.407251.002 РЭ . August 2012 Edition 3.0 КАRАТ-520 Ultrasonic flowmeters
17
1.
Description
and operation 2.
Intended use 3.
Maintenance 4.
Verification 5.
Repair 6.
Transportation
and warehousing 7.
Utilization
Set h
3
m
3
m /h
Set h
3
m
3
m /h
Set
h
3
m
3
m /h