Levitronix LEVIFLOW LFS-SU User Manual

User Manual for LEVIFLOW
®
LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
22
4 Operation
4.1 General Timing Specifications
4.1.1 Startup Time
After power-on a LEVIFLOW
®
converter startup sequence with information about converter type, firmware
version and baud rate are proceeded. During this sequence flow measurement is not performed. Start-up time
is about 8 seconds.
4.1.2 Thermal Stability Time
To guarantee specified accuracy thermal stability of sensor must be reached. Therefore, it is recommended to
wait 30 minutes after power-on of converter or after connecting a new sensor to the converter.
4.1.3 Zero Adjustment Activation Time
There are three possibilities to activate zero adjustment:
1. Activating by Levitronix
®
Service Software: Zero adjustment starts immediately after pressing
corresponding button
2. Activating by re-zero button on converter front (see Figure 13c): button must be pressed for 3 seconds to
initiate zero adjustment.
3. Activation by digital input (default configuration): digital input must be active for 3 seconds to initiate zero
adjustment.
4.1.4 Automatic Zero Adjustment duration
The duration to perform an automatic zero adjustment is 26-60 seconds.
4.2 System Operation with LFC-1C-PC
4.2.1 Standalone Operation with Display
The converter can be used as standalone device, where the flow values and other messages as shown in
Table 12 can be read on the display.
4.2.2 Display Messages
Priority
Event
Display Digit
Status Description
1
2
3
4
1
Download
–
d
l
-
Firmware download running. Blinking digits.
2
Volume counter reset
C
L
E
A
Volume counter is reset
3
Zero adjustment
0
A
d
J
Zero adjustment is running (approximately 2 sec.). Blinking digits.
4
Zero adjustment error
0
–
E
r
Zero adjustment error.
5
Volume counter pulse set error
P
–
E
r
Volume counter pulse length is too big to show full scale flow on digital output.
6
Measurement error
b
–
E
r
Sensor signal error -> empty sensor, bubble, etc.. Blinking digits.
7
Warning upper limit
H
Displays upper limit warning (with flow rate display by turns). Blinking with flow rate.
Warning lower limit
L
Displays lower limit warning (with flow rate display by turns). Blinking with flow rate.
Exceeds vol. counter value H
H
Volume counter value exceeded preset H. Blinking with flow rate.
Exceeds vol. counter value HH
H
Volume counter value exceeded preset HH. Blinking with flow rate.
8
Flow rate display
X.
X
X
X
Flow rate range: 0.000 ~ 9.999 L/min
X
X.
X
X
Flow rate range:10.00 ~ 99.99 L/min
9
No sensor connected
C
–
n
o
No sensor connected to converter.
10
Calibration memory read/write
C
–
A
c
Calibration reading or write activity.
11
Calibration memory error
C
–
E
r
Calibration memory error.
12
Short circuit on sensor
S
H
r
T
Potential short circuit detected on transducer of flow sensor or on sensor/adaptor cable.
Table 12: Display messages of converter

Levitronix LEVIFLOW LFS-SU Specifications

General

Brand	Levitronix
Model	LEVIFLOW LFS-SU
Category	Measuring Instruments
Language	English