1.4.4. Displaying measurement results
1.4.4.1. List of displayed parameters is given in Table 4.
Table 4
Number of displayed
symbols
Displayed
Parameter
Units
(format)
Integer
part
Fract.
part
Time
Current date
XX.XX.XX
Data
Current date
XX:XX:XX
Q
Current value of volumetric
flow rate with regard to flow
direction
(m
3
/h)
l/min
1-3
4
V+
Totalized volume of forward
flow
m
3
; l
1-7
0-4
V-
Totalized volume
of reverse flow
m
3
; l
1-7
0-4
Σ
V
Total value of
totalized volume
m
3
; l
1-7
0-4
Err
Status line
– – – – – –
Ver
Number of software version
XX.XX.XX.XX
NOTES:
1. Flow rate and volume of reverse flow and negative values of total vol-
ume are indicated by negative sign.
2. Totalized volume is the algebraic (considering the sign of the flow) sum
of flow volumes totalized for both forward (positive) and reverse (nega-
tive) flows.
3. Counters are overflowed at
V
>
2
×
10
9
m
3
and restart from zero.
1.4.4.2. In SERVICE and ADJUSTMENT mode, the LCD is constantly on. In
OPERATION mode, measurement results listed in Table 4 cyclically
appear on the display on pressing the relevant button. With each press-
ing of the button, the next parameter is indicated. When no button is
pressed during the period specified in the "
Service
" window of Viewer
BUF-311 program, the LCD goes off.
1.4.5. External connections
1.4.5.1. Serial interface
RS-485 serial interface is used to control the flowmeter, read
measurement results, data logs, configuration settings, and diagnostic
data as well as to modify configuration settings. The RS-485 interface
supports ModBus (RTU ModBus and ASCII ModBus), which is a stan-
dard protocol for VZLJOT instruments.
RS-485 interface supports cable communications among a group of
several end users, one of which can be a PC, at a distance of up to
1200 m. Network Protocol Adapter "VZLJOT AS", ASPV-010 version,
can be used to provide compatibility, if terminal equipment within the
group is produced by different manufacturers.
The flowmeter supports data transfer via RS-485 interface at a
constant speed of 4800 baud. Other communication properties are set
from a PC.
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