Knick SE 557 User manual

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PP
Position electrode
this side up
max. level
D-14163 Berlin
BVS 09 ATEX E 088 X
II 1G Ex ia IIC T3/T4/T6
0044
SE 557X/*-NMSH pH 0 to 14, -1 to 6 bar, 0 to 135 °C
Position elec trode
this side up
max. level
T
Ü
V 15 AT EX 164143
Made in Germany
0044
II 1 G Exia IIC T3/T4/T6
14163 Berlin
SE 557X/1-NVPN
p -1 to6 bar C°001ot02-pmeT0 to 14
pH rel
SE557Manual
4.2 Pressurizing the Fitting
When operating the sensor, it is important that the fit-
ting and electrolyte pressure is adjusted to be higher
than the effective pressure in the reactor vessel. This
reduces the risk of process fluid getting into the sen-
sor. The optimal pressure difference value to keep the
junctions clean and obtain acceptable electrolyte re-
fill intervals has to be established empirically from
case to case, however it should be at least 0.5bar. Reg-
ularly check the applied fitting overpressure during
operation, and re-adjust if required.
5 Maintenance
Regularly check the electrolyte level in the sensor.
At the latest when reaching the end of the reservoir,
refill with electrolyte up to the indication line for max.
level.
When the sensor is not in operation, store it with sen-
sor tip and junction well submerged in electrolyte
(ZU 0958) and protected from leaking electrolyte by
the sealing plug(4) . If a sensor is stored dry for a few
days by mistake, let it soak in electrolyte for several
hours before use.
6 Accessories
Memosens Ex cable CA/MS-010XAA
(Example: 10 m)
Electrolyte ZU0958
7 Specifications
The model designation, which is printed on each
sensor and on the packaging label, includes the
following information:
SE 557X/1-NMSN Model designation (example)
Sensor material
N: Alpha glass
Sensor connector
MS: Memosens
Solution ground
N: without
Length
1: 120 mm
2: 250 mm
Ex approval
X: Yes
pH range 0 ... 14
Temperature -20 ... 100 °C
Temp detector NTC 30 kΩ
Pressure, relative -1 ... 6 bar
Reference system Ag/AgCl
Electrolyte KCl, 3 mol/l,
for low temperature application
Junction Ceramic (2x)
pH glass Alpha glass, medium imped-
ance, fluoride resistant
Length 120 mm / 250 mm
Installation in Knick fittings for pressurized
sensors
8 Disposal
Observe the applicable local or national regulations
for disposal.
Instructions for Use for the SE 557 pH Sensors
!
WARNING – Failure to observe this warning may
result in serious injury.
The safety alert symbol on the nameplate means:
Read these instructions for use, observe the
specifications, and follow the safety instructions.
1 Safety Instructions
1.1 All Applications
Hazards due to pressure, temperature, aggressive me-
dia, or explosive atmosphere are possible, depend-
ing on the location of use. Therefore, the installation,
operation, and servicing of the sensor shall only be
carried out by suitably trained personnel authorized
by the operating company.
1.2 Hazardous Areas
Observe the corresponding local requirements and
standards for electrical installations in hazardous
areas. For orientation, please refer to IEC 60079-14,
EU directives 2014/34/EU and 1999/92/EC (ATEX),
NFPA 70 (NEC), ANSI/ISA-RP12.06.01.
Memosens Ex sensors are marked by an
orange-red ring. The Memosens Ex sensors
shall only be connected to a cable of type
CA/MS-***X** or to an intrinsically safe and certified
Memosens measuring cable which is identical in
hardware and function.
2 Intended Use
The sensor is designed for operation in a Knick fitting
and is used for continuous measurement of pH values
in liquid media.
3 Installation and Commissioning
•On unpacking, check the sensor for mechanical
damage. Report any damage to your Knick
service team.
•Remove the watering cap. Rinse the sensor with
clean water. Only dab the sensor to dry it.
Note: Do not rub the pH-sensitive glass, since
this can lead to electrostatic charging and slug-
gish response times.
•Remove any air bubbles behind the pH-sensitive
glass by gently swinging the sensor.
•Remove the protective foil from the electrolyte
filling hole (3). Fully remove the sealing plug(4)
prior to installation in the fitting.
NOTICE! The sensor may break if installed in the
fitting with the sealing plug.
Keep the sealing plug(4) for future use.
Note: If the sensor is stored outside the fitting,
the sealing plug(4) serves to protect it from
leaking electrolyte.
•Insert the sensor into the grounded fitting.
Refer to the user manual for the fitting.
Note: Suitable fittings can be found at
www.knick-international.com.
•Connect sensor and cable.
4 Operation
4.1 Calibrating the Sensor
2-point pH calibration is recommended for the SE 557
sensor. First remove the watering cap. Then dip the
sensor successively into two different buffer solutions
with given pH values (e.g., pH 7.00 and pH 4.00) and
calibrate the pH transmitter to these buffer values.
Memosens sensors can be adjusted using the calibra-
tion data. Please refer to the user manual of the pH
transmitter for further details.
1
Ø 12 mm
6
Knick
Elektronische Messgeräte
GmbH & Co. KG
Beuckestraße 22
14163 Berlin
Germany
Phone: [phone]
Fax: [phone]
[email protected]
www.knick-international.com
TA-SE557-TIIS-KNEN07 20200914
1Sensor connector:
Memosens
2Serial number
3Filling hole
4Sealing plug
5Maximum filling height
6Nameplate
120 / 250 mm
2
5
Remove the protective
foil prior to use.
Fully remove the
sealing plug(4) prior
to installation in the
fitting and keep it for
future use.
4
3
MEMO SENS

Certificate number: Marking:
BVS 16 ATEX E 037 X
IECEx BVS 16.0030X
JPEx DEK19.0046X
II 1G
Ex ia IIC T4 Ga
Ex ia IIC T4 Ga
Thermal Parameters:
For the pH Sensor Type SE 557X/*-*MSN
Temperature class Ambient temperature range of
connecting head Ta
Permissible process
temperature
T4 -20 °C < Ta < +120 °C 100 °C
Special Conditions
• The cable and the sensor shall only be used within the ambient temperature range specified for
the temperature class.
• Do not operate the Memosens sensors under electrostatically adverse process conditions.
Prevent strong vapor and dust streams from acting directly on the connection system.
Hazardous Areas: Electrical and Thermal Parameters