UniData Communication Systems 6541, Manual

Page: 3 / 49

Precision Water Level Instrument
Unidata Manual 6293 - Precision Water Level Instruments Issue 2.1 i
CONTENTS
1 6541B WATER LEVEL INSTRUMENT ...................................................................... 1
1.1 S
UPERSEDED
I
NSTRUMENTS
........................................................................................ 1
1.2 M
ANUAL
O
RGANISATION
............................................................................................ 1
2 APPLICATIONS.............................................................................................................. 2
2.1 U
SING THE
6541.......................................................................................................... 2
2.2 F
EATURES
................................................................................................................... 3
2.3 O
PERATING
M
ODES
..................................................................................................... 4
2.4 M
ODELS
...................................................................................................................... 5
2.5 M
ODEL
6541B
WITH
M
ICROLOGGER
........................................................................... 6
2.6 O
UTPUT
O
PTIONS
........................................................................................................ 6
2.7 M
OUNTING AND
I
NSTALLATION
O
PTIONS
................................................................... 7
2.8 F
LOAT
S
YSTEMS
.......................................................................................................... 7
2.9 M
ICROLOGGER
O
PTIONS
............................................................................................. 8
3 LOGGING DATA ............................................................................................................ 9
3.1 C
REATING A
S
CHEME FOR
Y
OUR
P
ROJECT
.................................................................. 9
3.1.1 Adding an Instrument to a Scheme......................................................................... 9
3.1.2 When to Log ......................................................................................................... 11
3.1.3 What to Log .......................................................................................................... 12
4 PREPARING FOR INSTALLATION ......................................................................... 14
4.1 C
ONTROLS AND
S
ETTINGS
......................................................................................... 14
4.2 C
ONNECTING A
B
ATTERY
P
ACK
................................................................................ 14
4.3 C
ONNECTING TO AN
E
XTERNAL
D
ATA
L
OGGER VIA
HSIO ....................................... 15
4.3.1 HSIO Interfaces.................................................................................................... 16
4.4 C
ONNECTING
M
ORE
T
HAN
O
NE
I
NSTRUMENT TO A
L
OGGER
.................................... 16
4.5 SDI-12 I
NTERFACE
.................................................................................................... 16
4.5.1 Wiring Connections.............................................................................................. 17
4.5.2 Commands ............................................................................................................ 17
4.6 C
URRENT
L
OOP
I
NTERFACE
(4-20
M
A). ..................................................................... 18
4.6.1 Wiring Connections.............................................................................................. 18
4.6.2 Span & Zero Configuration.................................................................................. 19
4.7 HSIO I
NTERFACES
. ................................................................................................... 20
4.8 C
ONNECTING
M
ORE
T
HAN
O
NE
I
NSTRUMENT TO A
L
OGGER
.................................... 20
4.9 B
ENCH
T
ESTING THE
I
NSTRUMENT
S
YSTEM
.............................................................. 21
5 SITE INSTALLATION ................................................................................................. 22
5.1 I
NSTALLING THE
I
NSTRUMENT IN THE
R
ECORDING
P
OSITION
.................................... 22
5.2 I
NSTALLING THE
F
LOAT
S
YSTEM
............................................................................... 22
5.3 S
ETTING THE
I
NSTRUMENT
W
ATERLEVEL
................................................................. 23
6 6541 APPLICATIONS................................................................................................... 24
6.1 M
EASURING
S
URFACE
W
ATER
L
EVELS
..................................................................... 24
6.2 M
EASURING
F
LOW IN
O
PEN
C
HANNELS
.................................................................... 24
6.3 M
EASURING
G
ROUND
W
ATER
L
EVELS
..................................................................... 24