SE 715/1-MS
Pmax: 3 bar tmax: 45 °C
SE 715/1-MS
Pmax: 3 bar tmax: 45 °C
SE 715/1-MS
Pmax: 3 bar tmax: 45 °C
SE 715/1-MS
Pmax: 3 bar tmax: 45 °C
SE715
Manual
SE715 Series Oxygen Sensors Instructions for Use
1
Connector (Memosens®)
2
A/F 19, serial number
3
PG 13.5 thread
4
Anode
5
Cathode
6
Membrane cap
7
ZU0939 adapter
!
WARNING – Failure to observe this warn-
ing may result in serious injury
The safety alert symbol on the nameplate
means:
Read these instructions for use, observe the spec-
ifications, and follow the safety instructions.
The SE715 amperometric oxygen sensor is equipped
with Memosens technology. This provides applica-
tion benefits, e.g., safe function thanks to perfect
galvanic isolation, digital data transmission, and
integrated sensor diagnostics.
The plug connector is resistant to dirt and moisture.
Calibration data, the operating time, sensor name,
and serial number are stored in the sensor head.
The serial number can also be found on the quality
certificate and the packaging label.
1 Safety Instructions
The sensor contains a liquid electrolyte. Protective
goggles and gloves should be worn when carrying
out maintenance work, e.g., membrane or electro-
lyte replacement.
The sensor is designed for a maximum operating
pressure of 3 bar and complies with the pressure
equipment directive 97/23/EC, Article 3(3).
During installation, take care not to damage the
plastic body or the thread (PG 13.5).
2 Intended Use
The sensor is designed for simultaneous measure-
ment of dissolved oxygen and temperature in indus-
trial processes, particularly in the fields of drinking
water, wastewater, water purification, activation,
aeration control, fish farming, fishkeeping.
3 Installation and Commissioning
•
On unpacking, check the sensor for mechanical
damage. Report any damage to your Knick service
team.
•
Remove the watering cap and briefly rinse the
sensor with clean water.
•
Insert the sensor into the fitting as described in the
fitting’s user manual or mount the adapter ZU0939
to use it with the sensor quiver of a Portavo porta-
ble meter.
Take care not to damage the sensor
membrane.
•
The sensor can be operated vertically or inclined up
to 15° off horizontal.
•
Connect the sensor to the cable.
Note:
Prior to commissioning, the sensor must be
polarized on a transmitter. Polarization should last at
least 30 minutes, after which time the sensor is ready
for operation.
4 Operation
4.1 Calibrating the Sensor
Calibration in air is recommended for the SE715
sensor. Rinse the sensor with clean water and gently
dab the membrane dry. Refer to the user manual of
the oxygen transmitter for further details. The cal-
culated calibration data (slope, temperature, time of
calibration) is stored directly in the sensor. Memosens
sensors can also be pre-calibrated in the laboratory. In
this case, on-site calibration is not required.
4.2 Temperature Detector
The integrated temperature detector is primarily in-
tended for automatic compensation of the measur-
ing signal, not for high-precision and safe tempera-
ture indication or control of the process temperature.
5 Maintenance and Cleaning
Observe the safety instructions listed above when
performing maintenance work on the sensor.
Clean the sensor with clean water after each produc-
tion cycle and regularly in the case of severe contam-
ination.
5.1 Replacing the Membrane
Hold the sensor upright and carefully unscrew the
membrane cap. Fill electrolyte into a new membrane
cap (see package contents). Carefully screw the mem-
brane cap back on. Rinse the sensor with clean water.
5.2 Cleaning the Cathode
Note:
The sanding procedure specified below should
only be carried out if the cathode is severely contam-
inated.
Visible deposits on the cathode can be removed with
fine sandpaper (package contents). To do so, lay the
sandpaper on a horizontal surface and place a drop of
water on the paper. Remove the membrane cap from
the sensor and move the cathode very carefully in a
circular motion over the sandpaper. Hold the sensor
upright and exert no pressure. Rinse the cathode with
clean water, fill a new membrane cap with electro-
lyte, and carefully screw the membrane cap onto the
sensor. Rinse the sensor with clean water.
5.3 Cleaning the Anode
The anode (silver/silver chloride) has a brown to violet
color and does not require cleaning.
6 Specifications
Model code
The markings on each sensor or on the packaging
label include the following information:
SE715/1 - MS
Model designation
Connector
MS: Memosens®
Length
1: approx. 120 mm
Further Data
Measuring range:
0 ... 20 mg/l
Response time t
90
:
<30 s
Resolution:
20 µg/l
Signal current in air:
100 ... 130 nA
Perm. temperature range: -5 ... 45 °C
Pressure, relative:
Max. 3 bar
Membrane material:
Silicone
Temperature detector:
NTC 22 kΩ
Connector:
Memosens
Body material:
Polysulfone
Immersion depth:
Min. 30 mm
Process connection:
PG 13.5
Tightening torque:
1 ... 3 Nm
7 Package Contents
•
Sensor
•
Quality Certificate
•
User Manual
•
Maintenance kit ZU0879, consisting of:
2 membrane caps
6 ampoules with electrolyte
Sandpaper
Absorbent paper
•
ZU0939 adapter for Portavo quiver
8 Disposal
Observe the applicable local or national regulations
for disposal.
A
ppr
ox. 120 mm
1
6
3
4
Ø 12 mm
2
Knick Elektronische Messgeräte
GmbH & Co. KG
Beuckestraße 22
14163 Berlin
Germany
Phone:
+49 30 80191-0
Fax:
+49 30 80191-200
Email:
Web: www.knick.de
MEMO
SENS
5
7
