OTT SE 200 User manual
English
Operating instructions
Shaft Encoder
OTT SE 200
We reserve the right to make technical changes and improvements without notice.
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Table of Contents
1 Scope of Supply 4
2 Order Numbers 4
3 Introduction 5
4 Installing the SE 200 6
4.1 Installing the SE 200 as a stand-alone device 7
4.2 Installing the SE 200 as an attachment (see Appendix A) 7
4.3 Installing the SE 200 in an observation well (see Appendix B) 7
5 Connecting the SE 200 8
5.1 Connecting the SE 200 to any datalogger using an SDI-12 interface 8
5.2 Connecting the SE 200 to any datalogger using 4 … 20 mA 8
5.3 Connecting the SE 200 to the LogoSens 2 using an SDI-12 interface 9
5.4 Connecting the SE 200 to the LogoSens 2 using 4 … 20 mA 10
5.5 Setting the rotational direction for depth or level measurement 11
6 SDI-12 Commands and Answers 12
6.1 Standard Commands 12
6.2 Extended SDI-12 Commands 12
7 Determining the maximum load resistance 14
(4 … 20 mA interface)
8 Maintenance 15
9 Note about the disposal of old devices 15
10 Technical Data 16
Appendix A: Installing the SE 200 as an attachment 17
Appendix B: Installing the SE 200 in an observation well 22
Appendix C: Dimensions of connecting angle B 25
1 Scope of supply
䊳OTT SE 200 – 1 Shaft encoder with permanently attached connecting cable (10 m, 15 m or 30
m); SDI-12 or SDI-12/4 … 20 mA interface; float pulley for
float cable with 1 mm diameter or for the bead chain
– 1 set of installation accessories
– 1 operating instructions
– 1 Factory acceptance test certificate (FAT)
2 Order numbers
䊳OTT SE 200 Shaft encoder 63.060.001.9.2
depending on desired design:
– SDI-12 or SDI-12/4 … 20 mA interface
– rotational direction to the left or to the right
– measuring range for designs with 4 … 20 mA interface
1 m, 10 m or 30 m / 3 ft, 30 ft or 90 ft
– float pulley for float cable or bead chain
– length of connecting cable 10 m, 15 m or 30 m
䊳Accessories Float 27.001.071.3.5
– 80 mm Ø
Counterweight 27.050.013.4.2
– 0.100 kg
Float cable
– 1 mm Ø; Nirosta
– Crimp sleeves
– Length:
10 m 27.150.040.9.2
30 m 27.150.041.9.2
50 m 27.150.042.9.2
100 m 27.150.043.9.2
Bead chain with installation accessories
– Length:
10 m 27.152.010.9.2
30 m 27.152.030.9.2
50 m 27.152.050.9.2
100 m 27.152.100.9.2
Observation well installation 55.430.050.3.2
set for 4"; 4,5"; 5" + 6"
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3 Introduction
The float-operated OTT SE 200 Shaft Encoder provides continuous water level
measurement of groundwater and surface waters.
Changes in water level are transferred via a float-cable counterweight system to
the float pulley of the SE 200. The rotation caused by this action is converted to
an electrical signal that is available at the connecting line.
The SE 200 is available with a 4 … 20 mA interface or with a combined 4 …
20 mA/SDI-12 interface and is intended for use for connection to an external
datalogger, a programmable logic controller (PLC), or to displays, for example.
Included in the scope of delivery is a set of installation accessories that enables
one to install the unit as a stand-alone device or in combination with any OTT
level recorder or that of a competitor. It is possible to install this unit in 4" to 6"
observation wells as well using an observation well installation set (accessory).
A special design of the SE 200 is available with a float pulley for a bead chain
instead of a float cable. This design operates without slippage even when the
water level changes rapidly.
SDI-12 and/or
4 … 20 mA interface
SE 200
Connecting line
Float
cable
Float
Counterweight
Float
pulley
Fig. 1: Setup of a level measurement
station using the OTT Shaft
Encoder SE 200.
5
4 Installing the SE 200
There are three different possible types of SE 200 installations:
䊳as a stand-alone device
䊳as an attachment to any mechanical level recorder:
– Variant 1: Exisiting float cable is fed through the SE 200 float pulley
– Variant 2: SE 200 float pulley is coupled to the float pulley of the level
recorder via a carrier unit.
䊳in a 4"; 4,5"; 5" or 6" observation well
An installation set with all required parts is provided along with the SE 200 to
install it as a stand-alone device and as an attachment (see Fig. 2).
Additional accessories required:
䊳for the stand-alone device: Float, float cable, counterweight
䊳for attachment device: –
䊳for observation well installation: Observation well installation set, float,
float cable, counterweight
Note
䊳SE 200 with float pulley for bead chain: Please refer to
Installation drawing for
Thalimedes with bead chain (55.430.025.4.7)
which accompanies the bead
chain.
Connecting angle A
+ frictiondisc
Connecting
angle B
Carrier
rail
Adhesive
strips
Cable
gland
Guide roller
Carrier base
Carrier
pin
Holder
M 6 x 18
self-locking
2 x M 6 x 25
2 x M 6 x 16
Fig. 2: SE 200 Installation Accessories.
Cut the adhesive strips to length
with scissors as required.
The holder and the cable gland are not
necessary for the installation of the SE 200.
The dimensions of connecting angle B
can be found in Appendix C.
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4.1 Installing the SE 200 as a stand-alone device
Please refer to Figures 2 + 3 and proceed as follows:
Fastening the SE 200
䡵Attach SE 200 to connection angle B (M6 x 16 + washers); attach connection
angle B to a flat base with double-sided adhesive strips (if necessary: use
screws in addition). Alternatively: Attach the SE 200 directly to a suitable
vertical mounting wall using M6 x 25 screws and washers.
Installing the float, float cable and counterweight
䡵Determine the distance from minimum (lowest) water level to the upper edge of
the SE 200; add approxiamtely 50 cm to this value = length of the float cable;
cut float cable to length.
䡵Form loops at either end of the float cable; slip the sleeves over the loops and
pinch with a flat nose pliers; suspend float and counterweight inside the loops.
䡵Place the float cable over the float pulley; allow the float unit to stabilise. Tip:
Use a safety device (such as a hook or a screw) to prevent possible loss of the
float and counterweight while installing them!
Now turn to Chapter 5.
4.2 Installing the SE 200 as an attachment
see Appendix A
4.3 Installing the SE 200 in an observation well
see Appendix B
Safety device
Connecting
angle B
M 6 x 16 +
washer
SE 200
Sleeve
Float cable
Connecting line
Adhesive
strips
Fig. 3: Installing the SE 200
as a stand-alone device.
Install connecting angle B
so that it points forward!
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5 Connecting the SE 200
The SE 200 contains an SDI-12 interface or a combination SDI-12/4 … 20 mA
interface depending on the conditions of delivery. These interfaces allow one to
connect the SE 200 both to the OTT datalogger and to any datalogger by another
manufacturer that has the correct interfaces. The SDI-12 interface must meet
SDI-12 Standard 1.2 (SDI-12 = Serial-Digital Interface with 1200 baud). The
interfaces of the SE 200 are available on a 4-wire connecting cable.
Note
䊳Referencing SE 200 measured values to a level zero: Input the contact gauge /
staff gauge measured value, for example using a scaling function of the data-
logger connected to the SE 200. Alternatively: Lift the float cable slightly and
rotate the float pulley until the SE 200 outputs the desired value.
5.1 Connecting the SE 200 to any datalogger using the SDI-12
interface
䡵Connect the SE 200 to an SDI-12 input of the external datalogger. Follow the
datalogger handbook as you do this. The wire assignments for the SE 200
connecting cable can be seen in Figure 4 (above).
5.2 Connecting the SE 200 to any datalogger using 4 … 20 mA
䡵Connect the SE 200 to a 4 … 20 mA input of the external datalogger. Follow
the handbook of the datalogger when you do this, as well as Chapter 7 of
these instructions,
determine the maximum load resistance (4 … 20 mA inter-
face)
! The wire assignments for the SE 200 connecting cable can be seen in
Figure 4 (below).
yellow SDI-12 Data
SDI-12
greenSDI-12 GND
white GND
brown+VCC
(yellow not used)
4 … 20 mA
(greennot used)
white V–
brownV+
Fig. 4: Wire assignment of
the SE 200 connecting cable.
top: Using the SDI-12 bottom interface
bottom: Using the 4 … 20 mA interface
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5.3 Connecting the SE 200 to the LogoSens 2 using an SDI-12
interface
䡵Connect the SE 200 as shown in Figure 5 to the to the LogoSens 2 Station
Manager using the connecting cable.
Please follow the LogoSens 2 Station Manager operating instructions as well.
Configuring the LogoSens 2 for SE 200 with the SDI-12 interface
䡵Create a LogoSens 2 channel using the
SDI-12 Master
function block (
Serial
sensors
tab).
䡵Apply the following settings:
䊳Terminal block A … R
connection terminal of the SE 200
䊳Slave address typically 0
(only one SE 200 is connected to the
terminal block)
䊳Value no. 1
(the SE 200 only determines one
parameter; the water level)
䊳Measurement mode M!
䊳Value no./Virtual Terminal ID Not necessary in connection with the SE 200
䡵In accordance with the conditions of delivery of the SE 200, adjust to the
required units and number of digits after the decimal point in the
Channel
function block (m: 3; cm: 0; ft: 3).
Fig. 6: Adjusting the LogoSens 2
SDI-12
Master
function block operating parameters.
SDI-12
input
Power
supply
sensor
Screwed terminal strip TScrewed terminal strip A … R
Connecting line SE 200
brown+Vcc
Data
white GND
greenSDI-12 GND
yellow SDI-12 data
GND +VBat = typ. +12 V
0 V
+VBat
43124312
LogoSens 2
Fig. 5: Connecting the SE 200 to the
LogoSens 2 Station Manager using
an SDI-12 interface.
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5.4 Connect the SE 200 to the LogoSens 2 via the 4 … 20 mA
interface
䡵Connect the SE 200 as shown in Figure 7 to the LogoSens 2 Station Manager
using the connecting cable.
Please follow the LogoSens 2 Station Manager operating instructions as well.
Configuring the LogoSens 2 for SE 200 with the 4 … 20 mA
interface
䡵Create a LogoSens 2 channel using the
I 4-20 mA
function block
(
Analog Sensors
tab).
䡵Apply the following settings:
䊳Terminal block A … R
Connection terminal of the SE 200
䊳Sensor lag time (s) 0
no lag time necessary
䊳Error code if range overflow If necessary: Recording error codes
when measuring ranges are exceeded
䊳Auxiliary sensor supply via relay Not necessary in connection
contact at terminal block
䡵Insert a
2-point scale
function block and make the appropriate settings
(e.g. for an SE 200 with a 10 m measuring range and level measurement:
Point 1: 4 →0 ; Point 2: 20 →10).
䡵In the
Channel
function block, adjust to the required units and number of digits
after the decimal point.
Fig. 8: Adjusting the LogoSens 2
I 4-20mA
function block operating parameters.
4 … 20 mA
input
Power
supply
sensor
Screwed terminal strip TScrewed terminal strip A … R
Connecting line SE 200
brown+Vcc
white GND
+VBat = typ. +12 V
0 V
+VBat
43124312
Resistor
100 Ohm
LogoSens 2
Fig. 7: Connecting the SE 200 to the
LogoSens 2 Station Manager using
a 4 … 20 mA Interface.
Use the 100 Ohm OTT resistor
(order number: 55.550.126.4.2)!
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