WIKA LF-1 Submersible Pressure Sensor Instruction Manual

: September 3, 2022
: WIKA

Table of Contents

WIKA LF-1 Submersible Pressure Sensor
Ex marking
Safety
Labeling, safety marks
Commissioning, operation
Pin assignment
Read User Manual Online (PDF format)
Download This Manual (PDF format)

WIKA LF-1 Submersible Pressure Sensor

Ex marking

Supplementary documentation:

This additional information for hazardous areas applies in conjunction with the operating instructions “Submersible pressure sensor, model LF-1” (article number 14141013).

DANGER!

Danger to life due to loss of explosion protection
Non-observance of these instructions and their contents may result in the loss of explosion protection.
Observe the safety instructions in this chapter and further explosion instructions in these operating instructions.
Observe the information given in the applicable Ex certificate and the relevant regulations for installation and use in hazardous areas (e.g. EN/IEC 60079-11, EN/IEC 60079-14, CEC Part I and NEC Art. 504/505).

Check whether the classification is suitable for the application. Observe the relevant national regulations. Permissible temperature ranges in hazardous areas (ATEX, IECEx, EACEx) Permissible temperature ranges in hazardous areas (FM, CSA)

Safety

Explanation of symbols
indicates a potentially dangerous situation in the hazardous area that can result in serious injury or death, if not avoided.

Intended use

The submersible pressure sensors described here are suitable for level measurement in hazardous areas.
The non-observance of the instructions for use in hazardous areas can lead to the loss of the explosion protection.
Adhere to the following limit values and instructions.

Responsibility of the operator
The responsibility for classification of zones lies with the plant operator and not the manufacturer/supplier of the equipment.

Personnel qualification
The skilled personnel must have knowledge of ignition protection types, regulations and provisions for equipment in hazardous areas.

Special conditions for safe use

For use in gas group IIC, submersible pressure sensors with cable material FEP must be protected against electrostatic charge. For use in gas group IlB, submersible pressure sensors with cable material FEP must be protected against intensive charge processes.
For the submersible pressure sensors with overvoltage protection, the intrinsically safe circuits are not separated from earth in accordance with EN 60079-11. Along the intrinsically safe circuits potential equalisation must be ensured.
If an additional metal measuring point tag is required, it has to be installed outside of the Ex atmosphere.
Parts of the enclosure may be constructed from plastic. To prevent the risk of electrostatic sparking the plastic surface should be cleaned only with a damp cloth.
Submersible pressure sensor (level probe) approved in accordance to FM/CSA for use in hazardous location areas shall be installed and operated according to control drawing 14136138

Labeling, safety marks

Product label

Model code
Approval data
P# Article no./ S# Serial no.
Power supply/ Current supply
Measuring range/Output signal
Safety-related maximum values
Pin assignment
Date of manufacture

Commissioning, operation

Suitability for the process conditions

All components of the instrument that are in contact with the process must be suitable for the process conditions that may exist. Included in this are particularly the process pressure, process temperature and also the chemical properties of the media. Prior to commissioning, the suitability of the instrument must be ensured (→ for specifications see operating instructions “Submersible pressure sensor, model LF-1” (article number 14141013)).

Safety inspection

Only use the submersible pressure sensor if it is in perfect condition with respect to safety.
Prior to commissioning, the submersible pressure sensor must be subjected to a visual inspection.
Check the diaphragm for damage. Leaking fluid is indicative of damage.
Check the cable for damage.

Mechanical mounting

The protection cap protects the internal diaphragm from damage during transport and during the lowering of the submersible pressure sensor.
Protect the diaphragm from abrasive media and impacts. With a damaged diaphragm, explosion protection cannot be guaranteed.
The measuring point tag must only be mounted in a non-hazardous area.
In hazardous location in accordance to FM/CSA, variation with ½ NPT thread for conduit connection, a sealing resp. sealing fitting according to CEC/NEC listed for the location shall be used.

Electrical mounting

Danger to life from damaged cable
If a cable is damaged, the explosion protection is no longer guaranteed.
Unpack the instrument as described.
Check the cable for damage.

Requirements for voltage supply

Voltage supply is intrinsically safe (Ex ia). Realisation possible via repeater power supply (e.g. model IS Barrier).
For power supply see product label

Electrical connection values

The internal inductance (Li ) and capacitance (Ci ) are found on the product label and they should be taken into account when connecting to an intrinsically safe voltage supply.

Requirement for shielding and grounding

DANGER!
Danger to life from incorrect instrument grounding Missing or incorrect instrument grounding can lead to a risk of explosion due to compensating currents between different potentials.

Ground the instrument.
The instrument must be shielded and grounded in accordance with the grounding concept of the plant.
No potential differences should exist between medium/vessel and terminal enclosure when the shield of the cable is being connected.
Ground the instrument, if the lines are longer than 30 m or leave the building.

Load

≤ (U+ -(U+min – 0.5 V)) / 0.023 A
The additional load of the cable: ≤ cable length in m x 0.084 Ω

Pin assignment

Legend

U+ Positive power supply terminal
U- Negative power supply terminal
S+ Analogue output

Configuring via HART interface

The HART® modem with RS-232, USB or Bluetooth interface (→ see accessories) enables the connection of communicating instruments to the respective interface of a PC. To parameterize these instruments, operating software with COMM DTM HART and Device DTM Generic HART (e.g. PACTware®) is needed. If the submersible pressure sensor has to be configured during operation in a hazardous area, the HART® modem must be designed for hazardous areas

INFORMATION

The PACTware® operating software and the required DTMs are available for download at www.wika.com

Connecting submersible pressure sensor to PC (HART®)

Any work should only be carried out in a non-hazardous area.
Connect HART® modem to submersible pressure sensor.
Connect HART® modem to PC or notebook.

With repeater power supplies with integrated HART® resistances (internal resistance approx. 250 Ω), no additional external resistance is necessary.

Appendix 1: EU Declaration of conformity

We declare under our sole responsibility that the CE-marked products

Type Designation: LF-1
Document No.: 14209906.03
Description: Submersible pressure sensor
according to the valid data sheet: LM 40.04

They are in conformity with the following relevant Union harmonization legislation: Applied harmonized standards

2011/65/EU Hazardous substances (RoHS) EN IEC 63000:2018
2014/30/EU Electromagnetic Compatibility (EMC) EN 61326-1:2013
2014/34/EU Explosion protection (ATEX) (2) EN 61326-2-3:2013
II 1G Ex ia IIC T6…T4 Ga
II 2G Ex ia IIC T6…T4 Gb
EN IEC 60079-0 :2018
EN 60079-11:2012

EU type-examination certificate BVS 16 ATEX E 116 X of DEKRA EXAM Testing and Certification GmbH (Reg. No. 0158)
Not for models L-1Z, L-1I, L-1E, L-1F, L-1C, L-1L, L-14, L-15

Fokko Stuke, Director of Operations Transmitters Industrial Instrumentation