Knick SE 554 Series Instructions For Use

Instructions for Use for the Series SE 554 pH/ORP Sensors
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.
1 Safety Instructions
1.1 All Applications
Hazards due to pressure, temperature, aggres-
sive media or explosive atmosphere are possi-
ble, depending on the location of use. There-
fore, 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 all applicable local codes and stan-
dards for the installation of electrical equipment
in hazardous locations. 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. The electrical and thermal pa-
rameters of the sensors must be adhered to.
Memosens Ex sensors are marked by an orange-
red ring. Combined with a model CA/MS-***X**
measuring cable or a certified measuring cable
which is identical in hardware and function, the
sensor may be connected to a suitable measur-
ing device, as described in the Certificates BVS
15 ATEX E141 X and IECEx BVS 15.0114X.
2 Intended Use
The sensor is used for continuous measurement of pH
and optionally of ORP (Model AMSN) in liquid media.
The SE 554 is a low-maintenance (polymer electrolyte)
and pressure-resistant sensor. It has a temperature
detector for automatic temperature compensation.
The sensor is designed for applications in industrial
processes:
• Heavily polluted media
• Media containing sulfides
• Emulsions and suspensions
• Alkaline media
• Media containing proteins
• Processes with large pressure variations
• Acidic media
• Media containing solvents
The sensor is non-sterilizable / non-autoclavable and
unsuitable for measurements in media containing
chlorine or bromine.
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 sen-
•
sor with pure water. After rinsing, the sensor should
only be dabbed dry with a tissue. Do not rub the
pH-sensitive glass, since this can lead to electrostat-
ic charging and sluggish response times.
Check the space behind the pH-sensitive glass for
•
the presence of any air bubbles and remove them
by gently swinging the sensor in a vertical plane.
Install the sensor in the fitting as described in the
•
user manual of the respective fitting.
Connect sensor and cable.
•
4 Operation
4.1 Calibrating the Sensor
2-point pH calibration is recommended for the SE 554
sensor: First remove the watering cap. Then dip the
sensor successively into two different buffer solutions
with given pH values (e.g., CaliMat pH 7.00 and pH
4.00) and calibrate the sensor to these buffer values.
ORP calibration is performed as a 1-point calibration
(delta value) using an ORP calibration solution. Please
refer to the user manual of the pH transmitter for fur-
ther details.
4.2 Temperature Detector
The integrated temperature detector is intended for
automatic compensation of the pH signal and not for
any high-precision and safe temperature indication
or control of the process temperature.
5 Maintenance and Cleaning
Carefully rinse the sensor tip and junction with pure
water after each operating cycle. Under no circum-
stances must measuring solution be allowed to dry
on these parts!
When the sensor is not in operation, store it with sen-
sor tip and junction well submerged in electrolyte
(3 mol/l KCl). If a sensor is stored dry for a few days
by mistake, let it soak in electrolyte for several hours
before use.
6 Specifications
Model Code
The markings on each sensor or on the packaging
label include the following information:
SE 554X/ 1 - AMSN Model designation
Sensor connector
MS: Memosens®
Pt electrode (ORP)
A: with
N: without
Length
1: 120 mm
2: 225 mm
3: 325 mm
4: 425 mm
Ex approval
X: Yes
Further Data
pH/ORP range 0 ... 14 / ±1500 mV
Temperature 0 ... 120 °C
Pressure, relative 0 ... 10 bar
Junction 2 x hole
Electrolyte Solid polymer
Reference system Ag/AgCl
pH sensor material Alpha glass
medium impedance,
universal glass,
fluoride resistant
ORP sensor material Platinum
Body material Glass
Mounting PG 13.5
Temp detector NTC 30 kΩ
7 Disposal
Observe the applicable local or national regulations
for disposal.
SE 554X/*-AMSN
Manual
SE 554X/*-NMSN
MEMO SENS
1a
2
3
4
5
6
Ø 12 mm
7
8
9
ORP
pH
Sensor connectors
1
Memosens
2 19 mm A/F, serial number
3 PG 13.5 thread
PVDF compression ring
4
EPDM-FDA O-ring (11.5 x 2.6 mm)
5
Nameplate
6
Junction
7
pH glass
8
Platinum (ORP sensors only)
9
Knick Elektronische Messgeräte GmbH
& Co. KG
Beuckestraße 22
14163 Berlin
Germany
Phone: +49 30 80191-0
Fax: +49 30 80191-200
info@knick.de
www.knick-international.com
096857
TA-SE554XAMSN-TIIS-KNEN02 20200317