JUMO dTRANS O2 01 User manual

Type 202610.0
Two-wire Transmitter
for dissolved oxygen (DO)
and
terminal box/
operating unit
B 20.2610.0
Operating Instructions
12.05/00394433

Contents
1 Typographical conventions ...................................................... 5
1.1 Warning signs ..............................................................................................5
1.2 Note signs ....................................................................................................5
2 General ....................................................................................... 6
2.1 Preface .........................................................................................................6
2.2 Arrangement of the oxygen measuring system ...........................................7
3 Oxygen transmitter dTRANS O2 01 ....................................... 11
3.1 Application .................................................................................................11
3.2 Construction ...............................................................................................11
3.3 Function .....................................................................................................12
3.4 Influence .....................................................................................................12
4 Instrument identification ........................................................ 14
4.1 Nameplate ..................................................................................................14
4.2 Type designation ........................................................................................14
5 Instrument description ........................................................... 15
5.1 Technical data of the two-wire transmitter ...........................................15
5.2 Technical data for the terminal box / operating unit ............................16
6 Assembly ................................................................................. 17
6.1 Two-wire transmitter ..................................................................................17
6.2 Flow-through fittings ..................................................................................18
6.3 Immersion fittings .......................................................................................20
6.4 Suspension fittings .....................................................................................22
6.5 Float fittings ...............................................................................................24
6.6 Support column with pedastal base, arm, chain and weather protection
canopy 26
6.7 Terminal box / operating unit .....................................................................28
7 Installation ............................................................................... 30
7.1 General ......................................................................................................31
7.2 Basic version (terminal box) ....................................................................31

Contents
7.3 Standard version (operating unit) ...........................................................34
7.4 Maximum version (operating unit with own PSU) .................................36
8 Setup program ........................................................................ 39
8.1 Function .....................................................................................................39
9 Commissioning ....................................................................... 40
9.1 Starting up ..................................................................................................40
10 Calibration ............................................................................... 42
10.1 General .......................................................................................................42
10.2 Calibrating ..................................................................................................42
11 Operation ................................................................................. 45
11.1 Function .....................................................................................................45
11.2 Display in measurement mode ..................................................................46
11.3 Principle of operation .................................................................................47
11.4 Configuration level .....................................................................................47
11.5 Parameter level ..........................................................................................49
11.6 Special functions ........................................................................................56
11.7 CODE .........................................................................................................56
12 Maintenance ............................................................................ 58
12.1 Two-wire transmitter for dissolved oxygen ................................................58
12.2 Replacing the sensor module ....................................................................59
13 Eliminating faults and malfunctions ...................................... 61
14 Appendix .................................................................................. 64
14.1 Before configuration ...................................................................................64
15 Drilling diagram ....................................................................... 67

5
1 Typographical conventions
1.1 Warning signs
1.2 Note signs
Danger
This symbol is used when there may be danger to personnel if the
instructions are ignored or not followed correctly!
Caution
This symbol is used when there may be damage to equipment or data if the
instructions are ignored or not followed correctly!
Note
This symbol is used when your special attention is drawn to a remark.
➩Reference
This symbol refers to further information in other chapters or sections.
abc1Footnote
Footnotes are remarks that refer to specific points in the text. Footnotes
consist of two parts:
A marker in the text, and the footnote text.
The markers in the text are arranged as continuous superscript numbers.
✱Action
This symbol indicates that an action to be performed is described.
The individual steps are marked by this asterisk.
Example:
✱Remove crosspoint screws.

6
2 General
2.1 Preface
Please read these Operating Instructions before commissioning the
instrument. Keep the manual in a place that is accessible to all users at all
times.
Please assist us to improve these operating instructions, where necessary.
Your suggestions will be appreciated.
Phone [phone]
Fax [phone]
All necessary settings are described in this manual. However, if any
difficulties should still arise during start-up, please do not carry out
any unauthorized manipulations. You could endanger your rights
under the instrument warranty!
Please contact the nearest subsidiary or the main factory in such a
case.
Caution
A sudden failure of a measuring cell may lead to excessive or
insufficient dosing of oxygen. This may harm living creatures (fish
in ponds or micro-organisms in wastewater-treatment plants).
Appropriate precautionary measures must therefore be taken in
such a case.

7
2 General
2.2 Arrangement of the oxygen measuring system
Basic version, type 202610/80...
- Two-wire transmitter JUMO dTRANS O2 01
- 8 m attached cable
- Terminal/operating unit with button for calibration
The basic version is designed for direct connection to a PLC or a recorder. The
calibration function can be initiated locally. An optional setup program is
available for configuring the transmitter. The two-wire transmitter is powered
by a separate power supply (optional), e.g. JUMO TN-22, see Data Sheet
95.6024
PLC
Visualization
or similar
24 V DC supply
for the
JUMO dTRANS O2 01
two-wire transmitter
Temperature at meas. point
optional (Pt1000)
2-wire connection
signal output for oxygen
(4 — 20 mA)
Terminal box
(Basic version)
Two-wire transmitter for
dissolved oxygen (DO)

2 General
8
Basic version, type 202610/80...
The JUMO dTRANS Az 01 (Jumo Data Sheet 20.2550), bezel size 96 x 48 is a
suitable indicator/controller for the basic version. This instrument is
recommended where there is no requirement for a direct connection to a PLC
or recorder. The JUMO dTRANS Az 01 can also provide the 18 V DC supply
necessary for the two-wire transmitter. See Data Sheet 20.2550 for further
details.

9
2 General
Standard version, type 202610/81...
As for the basic version, but with an operating unit (instead of the terminal box)
featuring a display and additional operating keys. The two-wire transmitter and
the operating unit are powered by a separate power supply (optional), e.g.
JUMO TN-22, see Data Sheet 95.6024. A further power supply (e.g. JUMO
TN-22) is required for the supply of the additional (optional) two-wire
transmitter for temperature. The instrument is operated from the membrane
keypad and operator prompting in plain text ensures that operation is
straightforward. The instrument is configured via the operating unit.
- PLC
- Visualization
- or similar
24 V DC supplies
for the
JUMO dTRANS O2 01
two-wire transmitter
and the
two-wire transmitter for
temperature
2-wire connection
signal output for oxygen
1
(4 — 20 mA)
2-wire connection
signal output for temperature
2
(4 — 20 mA)
Operating unit
(Standard version)
SERVICE
CALEXITPGM
Two-wire transmitter for
dissolved oxygen (DO)
Two separate
1
2
frei skalierbar
fest eingestellt: 0...50°C entsprechen 0...20 mA

2 General
10
Full (maximum) version, type 202610/82...
As for the standard version (see above). The operating unit has its own power
supply to power the two-wire transmitters for oxygen and temperature. The
output signal is in each case a 4 — 20 mA standard signal. In addition, this
version comes with two freely programmable relays for alarm generation and
limit monitoring. The display features backlighting.
- PLC
- Visualization
- or similar
Supply
110 — 240 V or
20 — 30 V
AC
AC/DC
signal output for oxygen1
(4 — 20 mA)
signal output for temperature2
(4—20mA)
2 relay outputs
Operating unit
(Maximum version)
SERVICE
CALEXITPGM
Two-wire transmitter for
dissolved oxygen (DO)
1
2
frei skalierbar
fest eingestellt: 0...50°C entsprechen 0...20 mA

11
3 Oxygen transmitter dTRANS O2 01
3.1 Application
General The instrument is suitable for continuous measurement of dissolved oxygen in
water.
Typical areas of
application
- Measurement of the O2content in activation basins. The measurement
signal is used here for monitoring, and as a control parameter.
- Check of the O2content in the outlet of wastewater-treatment plants.
- Measurement and control of the O2content in fish ponds and fish farms
(fresh and salt water).
- Monitoring of public water, e.g. rivers, lakes, reservoirs etc.
-O
2enrichment of drinking water.
3.2 Construction
of the
dTRANS O2 01
The oxygen transmitter consists of
- the housing (1) with the transmitter electronics and the connecting cable (2)
- the sensor module (3) and the protection basket (4)
(optionally with additional protective film)
of the
measuring cell
The measuring cell for dissolved oxygen is a membrane-covered galvanic cell
with an alkaline electrolyte.
The cell consists of
- the cell body with the two connection contacts to the evaluation unit
- the silver cathode
-theleadanode
- the electrolyte
- the oxygen-permeable (but not porous) Teflon membrane, which
constitutes the boundary surface between the inside of the cell and the
sample liquid.
(2)
(1)
(3)
(4)

3 Oxygen transmitter dTRANS O2 01
12
The cathode, with which the oxygen diffused through the membrane reacts
electrochemically, is in direct contact with the membrane, via a thin electrolyte
film.
3.3 Function
of the
transmitter
The transmitter operates on the 2-wire principle, i.e. the output is a
proportional modulation (4 — 20mA) of the current drawn by the transmitter.
The output signal is electrically isolated from the medium being measured.
of the
measuring cell
The cell does not need an external supply, since the minimum voltage of
about 850 mV that is necessary for oxygen reduction is internally generated
through the partial reactions (1) and (2).
(1) O2+ 2H2O + 4e-4OH- E° (O2) = +401mV (cathodic reaction)
(2) 2Pb + 4OH-2PbO + 2H2O + 4e-E° (Pb) = -576mV (anodic
reaction)
Sum O2+ 2Pb -> 2PbO E° = 977mV
If an electrical connection is made between cathode and anode via a working
resistance, a current will flow that is linearly proportional to the reduced
oxygen and, therefore, to the oxygen dissolved in the sample liquid.
The cell has no zero current, which means that when no oxygen is present,
there will also be no voltage and, consequently, no measuring current.
3.4 Influence
on the
measurement
signal
The measurement signal is influenced by the following factors
- the oxygen permeability of the membrane
- the saturation solubility of oxygen in water
- the salinity (salt content) and
- the vapor pressure of the water.
These factors are temperature-dependent.
The oxygen permeability of the membrane is design-specific. It depends on
the material, the thickness and the deformation of the membrane.
The remaining factors describe physical phenomena, such as are listed in
EN 25 814.
The factors mentioned above, and their dependency on temperature, are
taken into account by the microprocessor-controlled evaluation electronics
and compensated for.
Pressure fluctuations in the measured medium will affect the output signal!

13
3 Oxygen transmitter dTRANS O2 01
Influence of the
atmospheric
pressure
With present-day calibration methods (acquisition of the measurement signal
in vapor-saturated air), the atmospheric pressure must be considered, since
the tables above refer to the normal atmospheric pressure of 1013 mbar.
When the measuring device is installed either
- the height a.m.s.l. is entered. Since the weather-dependent fluctuations of
the atmospheric pressure only slightly influence the measurement variable,
they do not have to be automatically taken into account.
- or the present atmospheric pressure is measured and entered on the
transmitter.
The dTRANS O2 01 offers both entry options. The entries are made through
the setup program, or on the operating unit.
Salinity Salinity denotes the content of dissolved salts in water (in weight %).
The relationship between conductivity and salinity is described, for
example, on the following Internet page:
http://îoc.unesco.org/oceanteacher/resourcekit/M3/Converters/
SeaWaterEquationOfState/
Sea%20Water%20Equation%20of%20State%20Calculator.htm

14
4 Instrument identification
4.1 Nameplate
on the transmitter on the terminal box / operating unit
4.2 Type designation
X = combination is possible
1Special version: if appreciable fouling is expected, the protection basket of
the oxygen transmitter can be supplied with a protective membrane. This
membrane will, however, delay the sensor response.
M.K. JUCHHEIM GmbH&Co
Fulda Germany
www.jumo.net
JUMO dTRANS O2 01
Typ: 202610/80-500-2000-08-28
F - Nr.:12345678 00 0 0051 0004
DC 19...31V
M.K. JUCHHEIM GmbH&Co
Fulda Germany
www.jumo.net
JUMO dTRANS O2 01 (Bedieneinheit)
Typ: 202610/80-500-2000-08-28
F - Nr.:12345678 00 0 0051 0004
DC 19...31V
(1) Basic type
202610 Two-wire transmitter for dissolved oxygen (DO)
(2) Basic type extensions
80 Basic version1
81 Standard version1
82 Maximum version1
(3) Output (additional temperature output)
X 006 4 — 20 mA (internal supply)
X 405 4 — 20 mA (external supply)
X X 500 Resistance output Pt1000
(4) Oxygen range
X X X 2000 0 — 2 to 0 — 50 mg/liter (programmable)
(5) Cable length (transmitter)
X X X 08 8 m
(6) Supply
X 23 110 — 240 V AC +10 /-15%, 48 — 63 Hz
X 25 20 — 53 V AC/DC, 48 — 63 Hz
X X 28 19 — 31 V DC , +-0% (two-wire transmitter)
(7) Language
X X 1 German (standard)
XX 2 English
XX 3 French
XX 4 Spanish
(1) (2) (3) (4) (5) (6) (7)
Order code 202610 / - - 2000 - 08 - -
Order example 202610 / 81 - 500 - 2000 - 08 - 28 - 1

15
5 Instrument description
5.1 Technical data of the two-wire transmitter
Supply 19 — 31 V DC; nominal 24 V DC; 8 VA
Permissible
ambient
temperature
-5 to 50°C
Length of the
connecting
cable
8 m
Electrical
connection
screw terminals
Lightning
protection
coarse and fine protection
Electromagne-
tic compatibility
(EMC)
to EN 61 326
Measurement
range
0 — 2 to 0 — 50 mg/liter (freely programmable)
standard setting: 0 — 20 mg/liter => 4 — 20 mA
Measurement
units
mg/liter or % saturation
standard setting: mg/liter
Accuracy ±1% of range end (20 mg/liter)
Temperature
compensation
0 to +50°C
Atmospheric
pressure
compensation
via direct input of atmospheric pressure:
500 — 1500 hPa (mbar)
via input of height a.m.s.l.:
0 — 3000 m
standard setting: 300 m a.m.s.l. or 976 hPa
Salinity
(salt content
compensation)
0 — 40 g/kg
standard setting: 0 g/kg
Output signal for dissolved oxygen:
4 — 20 mA, freely scalable within the range
standard setting: 4 — 20 mA => 0 — 20 mg/liter
for temperature:
as resistance value Pt1000 (1000 at 0°C, to DIN 45921, Class B)
fixed setting: 0 to 50°C corresponding to 0 — 20 mA

5 Instrument description
16
Burden
Response time oxygen measurement (at 25°C): t90 < 180 sec
temperature: t90 < 300 sec
Flow rate min. 5 cm/sec
Safe pressure max. 6 bar at 20°C
Enclosure
protection
IP68 to EN 60 529
Housing
material
shaft: stainless steel 1.4305
sensor head and protection basket: PVC
Weight approx. 700 g
5.2 Technical data for the terminal box / operating unit
Supply see nameplate on the terminal box / operating unit
Graphics
display
visible area: 56 x 21 mm
background lighting (on maximum version)
Permissible
ambient
temperature
basic version: -10 to +70°C
standard and maximum version: -10 to +50°C
Electrical
connection
pluggable screw terminals
Lightning
protection
coarse and fine protection
Electromagne-
tic compatibility
(EMC)
to EN 61 326
Enclosure
protection
IP65 to EN 60 529
for panel mounting: IP54 to EN 60 529
Housing
material
Macrolon®(polycarbonate, PC)
Weight approx. 500 g
Type 80
(basic version)
dissolved oxygen
UB– 11 V
0.02 A
Type 81
(standard version)
dissolved oxygen/temp .
UB– 17 V
0.02 A
Type 82
(maximum version)
dissolved oxygen/temp .
350 Ohm

17
6 Assembly
6.1 Two-wire transmitter
Installation
variations
The transmitter type 202610 has a G1 A (1" pipe) thread (1) (underneath the
blue cap) and can be screwed into suitable immersion or flow-through fittings.
Operating
position
Preferably vertical, with the membrane (2) pointing down.
Alternative transmitter positions are allowed under unfavorable flow
conditions, but not beyond the horizontal position. An upwards orientation of
the membrane is not permitted!
Measurement
point
The location for the fitting has to be chosen so as to enable easy access for
calibration at a later time. Care has to be taken that the support columns and
fittings are safely secured and largely free from vibration. For submerged
operation in activation basins, a location has to be chosen that is
representative of the typical oxygen concentration.
Pre-assembly For submerged operation it is advisable, for safety reasons, to pre-assemble
the individual modules at some distance from the basin, on a firm surface.
Only then can the final assembly be performed at the desired location.
Screwing in and
unscrewing the
transmitter
The connecting cable must be able to rotate freely!
The cable must not be twisted!
Avoid strong tension on the cable. In particular, avoid tugging on the cable.
(1)
(2)

6 Assembly
18
6.2 Flow-through fittings
Application Flow-through fittings are used to accommodate the dTRANS O2 01 oxygen
transmitter. The fittings are installed directly in the pipeline conveying the
liquid, or in the bypass. The special construction of the fitting ensures a
correct flow past the sensor, thereby avoiding measurement errors.
The following points should be noted when planning the pipework layout:
- The fitting must be easily accessible, to allow regular maintenance and
cleaning of the transmitter or the fitting itself.
- Bypass measurements are recommended. Shut-off valves should be
provided so that the transmitter can be removed.
- Where systems are subject to temperature and / or pressure loading, the
fitting and the transmitter must meet the requirements.
The suitability of the materials of the fitting and the transmitter (e.g. chemical
compatibility) must be checked by the system designer.
Flow-through
fitting, angled
seat
Material: PVC
Permissible temperature: +5 to +50°C
Safe pressure: up to 1 bar
Connection: solvent weld sockets
Process connection: T-piece DN50, 45°
Sales No. 20/00398137

19
6 Assembly
Flow-through
fitting, hose
connection
Material: housing PVC
pipe clip PP
Permissible temperature: +5 to +50°C
Safe pressure: up to 1 bar
Connection: G1/4 (1/4" pipe) for 8 x 6 mm hose dia.
Sales No. 20/00398142

6 Assembly
20
6.3 Immersion fittings
Application Immersion fittings are used to accommodate the dTRANS O2 01 oxygen
transmitter. The fittings are installed in open containers or sluices using the
pipe clips supplied. Different immersion depths are facilitated by various
immersion lengths.
The following points should be noted at the design stage:
- The fitting must be easily accessible, to allow regular maintenance and
cleaning of the transmitter or the fitting itself.
- The suitability of the materials of the fitting and the transmitter (e.g.
chemical compatibility) must be checked by the system designer.
Immersion
fitting
Material: immersion tube PVC
pipe clip PP
Permissible temperature: +5 to +50°C
Safe pressure: up to 1 bar
Cable gland: Pg11
Protection: IP65 EN 60 529
Immersion length: 500 mm
Sales No. 20/00398131
Immersion length: 1500 mm
Sales No. 20/00398135
see diagram on next page