Knick Series SE 707-Memosens Instructions For Use

Instructions for Use of Series SE 707-Memosens ®
Caution!

5. Installation and commissioning

Please read these instructions carefully before 1. On unpacking, check the sensor for mechanical
putting the sensor into operation, in order damage. Report any damage to your Knick service
team.
to ensure faultless function. Operation and
servicing of the sensor must be carried out by 2. Prior to first use, you must fill the sensor with new
specially trained personnel authorized by the electrolyte (see section 8).
operating company. 3. Remove the protective cap.
Warning! 4. Please refer to the instruction manual of the relative
fitting in order to install the sensor.
After an Ex-certified sensor has been used with
non-Ex components, this sensor must no longer 5. Sensor and cable are plugged together and locked
be used in a hazardous location. by a quarter turn of the coupling ring. See function
description of Memosens
1. Introduction Prior to first use, you must polarize the sensor. After 6
The Knick oxygen sensors of the SE 707 series with hours, the sensor is polarized and ready for operation.
See section 6. Polarization for more information.
Memosens ® connector system are low-maintenance
and pressure-resistant oxygen sensors with integrated
temperature detector. Note
SE 707 sensors are suitable for in-line measurement
As delivered, a moderate slope value is stored in the
of dissolved oxygen and temperature in the different
sensor. The sensor must be calibrated before first use.
fields of analytical chemistry:
• Biotechnology
• Pharmaceutical industry

6. Polarization

• Fermentation
SE 707 sensors are suitable for sterilization and auto- Prior to first use or when the sensor has been discon-
nected from the voltage source for longer than 5 min-
claving and are CIP capable.
utes, you must polarize the sensor by connecting it to
an operating transmitter and then calibrate it.

2. Safety information

Polarization time depends on the time without polar-
ization voltage. The respective polarization times are
The sensor is intended only for the use described in
shown in the following table.
section 1. Introduction above. Be sure to wear safety
goggles and gloves when cleaning or calibrating a sen-
Time without
sor using acid or alkaline solutions.
polarization voltage d [min.]
The sensors are designed for an operating pressure
of 6 bars and meet the PED requirements (Pressure
d > 30
Equipment Directive 97/23/EC, Article 3, Sec. 3).
30 > d > 15
15 > d > 5

7. Calibration of sensor and transmitter

3. Product description

When the sensor is continuously used, you must cali-
brate it at regular intervals. Calibration is also required
The markings on each sensor or on the packaging label
after replacement of electrolyte, membrane module
include the following information:
or interior body.
Knick Manufacturer of sensor
SE 707/*-*MSN Model designation Note:
To check whether the sensor needs to be cali-
Memosens® connector (MS)
brated, you can take it in the air, dab it dry and check
the display on the transmitter. The indicated oxygen
saturation should be close to 100%. If not, you must
Length (1: 120 mm, 2: 225 mm)
calibrate the sensor.
-5...80 °C Temperature range

7.1 One-point calibration

The serial number is printed on and also electronically
Calibration in air with known water-vapor saturation
stored in the sensor head. See also enclosed quality
1. Take the sensor out of the process medium.
certificate.
2. Clean the sensor shaft.
3. Carefully dab the membrane dry with a paper tissue.
4. Hazardous-Area Concept
4. Perform the calibration as instructed in the trans-
The sensors are intrinsically safe equipment of Cat- mitter manual.
egory 1. They may be installed within explosive gas
(Refer to the manual for further calibration methods.)
atmospheres up to Zone 0.

7.2 Two-point calibration

II 1 G Ex ia IIC T3/T4/T6
For two-point calibration, always start with the zero
BVS 10 ATEX E 089 X
0044 calibration before calibrating the slope.
With two-point calibration, you achieve a higher ac-
1. Connect the sensors only to an intrinsically safe, ap- curacy with very low oxygen concentrations. For zero
proved cable of Type CA/MS-***X** (BVS 09 ATEX E calibration, we recommend an oxygen-free medium,
083 X) from Knick Elektronische Messgeräte GmbH
e.g. nitrogen with a purity level of at least 99.995%.
& Co. KG. After the sensor signal has stabilized, the sensor and
2. Do not operate the sensors under electrostatically
transmitter are calibrated to the zero value of the
adverse conditions. Prevent strong vapor and dust desired process variable.
streams from acting directly on the sensors and Please refer to the user manual of the transmitter.
measuring cable. The shaft length is not Ex-relevant.
1. Observe the stipulations for electrical installations in
explosive gas atmosphere (EN/IEC 60079-14) when
using the sensors and cables.

8. Maintenance

2. Observe the stipulations/conditions for safe use of
The maintenance intervals depend on the sensor
the connected intrinsically safe Memosens® sensor.
application.
Maintenance comprises cleaning the sensor and
replacing wear parts and consumables such as:
- O-rings
Note!
- Electrolyte
If the ambient temperatures indicated are observed,
- Membrane module
no impermissible temperatures for the temperature
- Interior body
class in question occur at the equipment.
Oxygen Sensors Instructions for Use of Series SE 707-Memosens

8.1 Disassembly

1. Unscrew the cap sleeve from the sensor shaft and
carefully pull it off the sensor.
2. Pull off the membrane module from the interior
body. Before replacing electrolyte, you must remove
the membrane module from the cap sleeve.
3. Rinse the interior body with distilled water and care-
fully dab it dry with a paper tissue.
Perform steps 4 and 5 only when dismounting the
interior body:1 ⁾
4. Loosen the lock nut using a 3/8" open-end wrench.
® cable. 5. Pull the interior body out of the sensor shaft. (Use a
plier if necessary.)
Note
Do not twist the interior body when pulling it out. The
contact pins might break off.

8.2 Assembly

Perform steps 1, 2 and 3 for mounting the interior body.
1. Insert the interior body in the sensor body. Turn it
until the slot in the interior body engages with the
pin in the sensor body.
2. Press the interior body in the sensor shaft until the
stop is reached. Then screw on the lock nut and
tighten it using a 3/8" open-end wrench.
3. Check all O-rings for damage. Replace if necessary.
4. Half fill the membrane module with O
Make sure that there are no air bubbles in the mem-
brane module.
Note:
Air bubbles can be removed by carefully tap-
Required
ping on the membrane module.
polarization time [min.]
360
Caution!
6 * d
The electrolyte is strongly alkaline. Avoid
4 * d contact of electrolyte with skin, mucous
membranes or eyes. Wear suitable protec-
d < 5 2 * d
tive gloves and goggles when servicing the
sensor.
5. Slip the membrane module over the interior body
while holding the sensor in a vertical position.
Remove excess electrolyte with a paper tissue.
Note
: Make sure that there is no electrolyte, process
solution or any other contamination between mem-
brane module and cap sleeve.
6. Carefully slip the cap sleeve over the membrane
module and screw it tight.
7. Note: After each replacement of electrolyte, mem-
brane module or interior body, you must repolar-
ize (see section 6. Polarization) and recalibrate the
sensor (see section 7. Calibration).

9. Cleaning the sensor

Depending on the measured medium, the sensor must
be cleaned to ensure accurate measurements.
You can clean the sensor shaft with water and a suit-
able brush.
Use water and a soft paper tissue to remove dirt par-
ticles from the membrane or membrane module.
After cleaning, thoroughly rinse with clean water.
Note:
Do not use cleaning agents or alcohol. This
could damage the sensor or lead to fault currents.
10. Warranty
12-month warranty after date of shipment in the event
of manufacturing faults.
11. Disposal
Please observe the applicable local or
national regulations concerning the dis-
posal of "waste electrical and electronic
equipment".
1 ⁾ The interior body must only be replaced if the
electrode system is poisoned or the interior body
is broken.
® Oxygen Sensors

11. Specifications

Measuring range pO2 < 1200 mbars
Detection limit 1 ppb
(3 ppb in in liquids containing CO2)
Accuracy 1 % + 1 ppb
(1% + 3 ppb in liquids containing CO2)
Response time at 25 °C 98 % full scale < 90 s
(air –> N 2 )
Signal in ambient air 290 ... 500 nA
Residual signal in ≤0.1% of signal in ambient air
O 2 -free medium In CO2: ≤0.01% of signal in ambient air
Flow dependence ≤ 5%
Permissible pressure 0.2 ... 6 bars absolute
range (measurement)
Mechanical Max. 12 bars absolute
pressure resistance
Permissible -5 ... 80 °C
temperature range
Temperature range -5 ... 121 °C
(stability)
O-ring material Silicone
(FDA & USP approved up to VI)
Membrane material PTFE / silicone / PTFE,
FDA compliant
(steel-mesh reinforced)
Process-wetted Stainless steel, 1.4435
electrolyte.
2
sensor parts (material certificate 3.1B)
Surface roughness N5 (RA < 0.4µm)
Temperature detector NTC 22 kΩ
Interior body Replaceable (ZU 0568)
incl. sensing electrodes
Sensor cap Memosens®
12. Accessories / Spare parts
O 2 membrane module, separate ZU 0563
O 2 membrane kit, consisting of: ZU 0564
Membrane module (4x),
O-ring set (1x),
25ml electrolyte (1x)
O 2 electrolyte 25 ml ZU 0565
Interior body for SE 707 ZU 0568
O-ring set, silicone, FDA ZU 0679
Recommended fittings:
ARI 106
ARF 200/202
ARF 210
ARD 230
SensoGate® WA 130/131
14163 Berlin
SE 707X/1-NMSN
BVS 10 ATEX E089 X
II 1G Ex ia IIC T3/T4/T6 orange-red ring
Ex-Sensors
14163 Berlin
SE 707X/2-NMSN
BVS 10 ATEX E089 X
II 1G Ex ia IIC T3/T4/T6
Interior body
Membrane module
Cap sleeve Cap sleeve
Membrane
Knick
Elektronische Messgeräte GmbH & Co. KG
P.O. Box 37 04 15
D-14134 Berlin
Germany
Tel: +49 (0)30 - 801 91 - 0
Fax: +49 (0)30 - 801 91 - 200
www.knick.de
knick@knick.de
TA-SE707MS-KNX02 20100709
SE 707
MEMO SENS
12345
Serial No.
67
Ø 12 mm