Stationary humidity
measuring instrument for
measuring pressure
dew-point and
atmospheric dewpoint
for explosive areas.
FA 300-2 Ex
INSTRUCTION MANUAL
Process safety for compressed air systems
V1_04_2009
CONTENTS
INTRODUCTION
Dear CS-customer,
You have made the right decision by choosing a measuring instrument from CS INSTRUMENTS
GmbH. Thousands of customers buy our high standard products every year. There are a few
good reasons for doing so:
2
Page
Introduction ................................................................................................................... 2
Notes on safety ............................................................................................................... 3
Description ..................................................................................................................... 3
Diagram of instrument / Dimensions of instrument ............................................................... 4
Technical data ................................................................................................................. 5
Dew point diagram for compressed air ............................................................................... 6
Installation ................................................................................................................ 7 - 8
Calibrating / Adjusting – Connection ................................................................................. 9
Ordering data ............................................................................................................... 10
Warranty ...................................................................................................................... 11
Contact ........................................................................................................................ 12
• Cost-performance ratio. Reliable quality at a fair price.
• We have the ideal solutions for your measuring tasks based on our expert experience
• gained over 20 years.
• Our high quality standard.
• Of course, our instruments carry the CE symbol required by the EU.
• Calibration certificates, trainings, consultation and calibration on location.
• Our after-sales service, we do not leave you out in the cold.
Our service guarantees fast help.
Measuring instrument conforms with DIN EN 61326
FA 300-2 Ex is a 4-20 mA loop powered instrument, that generates a current flow according
to the measured humidity or dewpoint.
Ex factory, various measurement values can be assigned to the analogue output such as:
dewpoint, relative humidity, absolute humidity in mg/m
3
, g/m3and g/kg, ppm V/V. The scaling
of the analogue output is adjustable as required.
Manufacturer: Typ discription:
Fa. CS INSTRUMENTS GmbH
Typ Protection class
Am Oxer 28c
D-24955 Harrislee FA 300-2 Ex Ex ia IIC T4
www.cs-instruments.com
Protection class/ Marking:
• FA 300-2 Ex: Intrinsic Safe
• Marking II 2 G Ex ia IIC T4
• According to EN 60079-0:2004
• and DIN EN 50020/8:2003
3
NOTES ON SAFETY
DESCRIPTION
Vor Inbetriebnahme lesen!
Achtung: Druckbereich >50 bar bei Standardversion
nicht überschreiten. Bei Sonderversion bis 350 bar.
Messbereiche das Messwertaufnehmers beachten!
Bei Überhitzung werden die Fühler zerstört.
Zulässige Lager- und Transporttemperatur sowie die
zulässige Betriebstemperatur beachten
(z. B. Messgerät vor direkter Sonneneinstrahlung schützen).
Bei Öffnen des Geräts, unsachgemäßer Behandlung
oder Gewaltanwendung erlöschen die Gewährleistungsansprüche!
Einstell- und Kalibrierarbeiten nur durch qualifiziertes
Personal aus der Mess- und Regeltechnik durchführen lassen.
Wichtig: Vor der Installation kurz Druckluft abströmen lassen um Kondensat und
Partikel zu entfernen. Verhindert die Verschmutzung des FA 300.
Stehende Luft führt zu langen Messzeiten.
SICHERHEITSHINWEISE
Please read prior to operation!
Warning: Don’t exceed pressure range.
Observe measuring ranges of sensor!
The probes are damaged if overheated.
Observe max. storage and transport temperature
as well as max. operating temperature.
(e.g. protect measuring instrument from direct sunlight).
Warranty claims no longer apply if the instrument is opened,
in the case of inexpert handling or use of force.
Adjustment or calibrations should be carried out by qualified
measurement and control engineering staff from CS INSTRUMENTS GmbH.
4
Dimensions in mm
DIAGRAM OF INSTRUMENT
FA 300-2 Ex
Cable max. 8
Technical data FA 300-2 Ex
TECHNICAL DATA
Measuring range: pressure dewpoint in °C
FA 300-2 Ex -80 to +20 °C
^ 4 to 20 mA
td
=
td
Pressure range: -1 to 300 bar
Power supply: 24 VDC (10 to 30 V DC)
Accuracy: ±0,5 °C
typical ±2 °Ctdat -40 °C
(-10 to +50 °Ctd)
td
td
Output: 4 to 20 mA in 2-wire technology
Protection class: IP65
CE conformity to: DIN EN 61326
Operating temperature: -20 to +70 °C
Storage temperature: -40 to +80 °C
Load for analogue output: 울 500 Ohm
Screw in thread: G 1/2" stainless steel
Material of housing: polycarbonate
Sensor protection: sinter filter 50 µm stainless steel
max. working resistance
of analogue signal: 500 R at 24 VDC
max. Input Voltage Ui: 30 V
max. Input current li: 100 mA
max. Input power Pi: 1 W
max. effective inner capacity Ci: 17 nF
max. effective inner inductance Li: Neglectable
The provided EG pattern approval certificate ZELM 05 ATEX 2291:2009 is to be considered.
5
DEW POINT DIAGRAM FOR COMPRESSED AIR
12345710 14 20
01234691319
0,1
0,2
0,3
0,4
0,5
0,7
1,0
2
3
4
5
7
10
20
30
40
50
70
100
-10
-5
0¡
2¡
5
10
15
20
25
30
35
40
45
50
55
60
65
70
45
40
35
30
25
20
15
10
5
2
0
-5
-10
-15
-20
-25
-30
50
55
70
°
65
60
A reduction in pressure
at the sampling point
may result in a reduction
of the pressure dew point
value.
Pressure dew point °C
Gramme of water vapour per m
3
of moisture saturated compresse air
*
g
()
m
3
Air pressure (bar)
Air pressure (bar)
* with reference to 0 bar, 20°C
The diagram provides information on the change in pressure dew point when there is a drop in
pressure. Example: a drop in pressure from 8 bar to 6 bar working positive pressure is shown.
In this case the pressure dew point drops from 10 °C to 5 °C.
compressed air
6
DEW POINT DIAGRAM FOR
COMPRESSED AIR
7
INSTALLATION
In general humidity can be measured in all non-corrosive
active gases. For corrosive gases please query with
CS INSTRUMENTS GmbH.
To enable accurate measurements in the low dew point range (–30 to –80 °Ctd), the measuring
temperature of the gas should, if possible, be that of room temperature (20 to 35 °C). With resin
driers, for example, or other applications, the temperature of the measuring gas is often higher,
e.g. 70° to 120°C.
In this case we recommend installing a "cooling tunnel" of impermeable material in front of the
screw-on measuring chamber.
A Teflon pipe or a copper pipe would be ideally suitable for this purpose, as the hot gas is
cooled to ambient temperature over the length of the pipe, approx. 2 to 5 m.
Please do not use ordinary plastic tubes!
The dew point temperature in °C
td
does not change when cooled as it is an absolute humidity
value, which, like other measured variables e.g. g/m3, is independent of temperature.
INSTALLATION
FA 300-2 Ex
Compressed air pipe
Directly in the compressed air system
Screw in probe with G ½ " thread pressure-tight in the centre or in the compressed air pipe where the measurement is
to take place.Ensure that the measurement is carried out
close to the compressed air flow. U-bend pipes or non-flowing compressed air result in very slow reaction times for the
moisture reading. Installation is recommended following drying of the compressed air and all bypass pipes or for critical
compressed air users.
INSTALLATION
Measurable gases:
INSTALLATION
Consideration: When installing the instrument in areas
of gas group IIC ensure, that there are no sparks even
in uncommon hazardous incidents.
Druckluftleitung
FA 300
8
INSTALLATION
Requirements for installation in hazardous area
Zone 1
Humidity/Dew point transmitter FA 300-2 Ex is only allowed to be connected to an intrinsic safe
circuit, in which an electrically isolated supply and signal circuit in the power supply is preferred.
Equipment without electrical isolation according to EN 50020 must not be used, if a potential
equalization occurs along the wire. The related requirements according to EN 60079-14 have to
be met.
Uo= 30 V max.
Io= 100 mA max.
Po=1 W max.
The maximum effective inner capacity is 17 nF, the maximum effective inner inductance is neglectable.
4 to 20 mA analogue output
Order No. 0700.3021
FA 300-2 Ex
Connection of transmitter to ATEX certified supply
Explosive area non explosive area
Barrier
Power supply
PLC
9
CALIBRATING / ADJUSTING
From the manufacturer
According to DIN ISO certification of the measuring instruments, we recommend regular
calibration, and if necessary, adjustment of instrument by the manufacturer. The calibration
cycles should fit your internal scheme. We recommend a yearly cycle. If requested, we can
carry out calibration on your premises.
Connection: Basic instruments FA 300-2 Ex
4 to 20 mA analogue output
in 2-wire technology
Opening the plug:
for opening the plug for connection
light levering with a flat screw driver.
Connection:
1. internal use
2. – Vb (earth 0 V)
3. + Vb (supply 24 V DC, 10...30 V DC)
4. NC
max. cable cross section: 1,5 mm
2
cable diameter: PG9
Output: 4 to 20 mA in 2-wire technology
CONNECTION
10
Order data Order No.
FA 300-2 Ex pressure dewpoint measuring instrument (-80 to +20°C
td
) 0699.3070
Special scaling analog output in g/kg, %rF, mg/m
3
0699.4004
Precision calibration at -40°Ctdincl. certificate 0699.3396
Intrinsically safe power supply, safety barriers 0554.3071
ORDER DATA
11
WARRANTY
Dear Customer
Thank you for your confidence in CS INSTRUMENTS GmbH which you have shown by
purchasing this measuring instrument. You have made the right choice by choosing a quality
product. If you have reason for complaint we will repair any faults free of charge if it can be
proven that they are manufacturing faults. The fault should be reported immediately after it has
been found and within the warranty time guaranteed by us.
WARRANTY
Excluded from this warranty is damage caused by improper use and non-adherence to the
instruction manual.
The warranty is also cancelled once the measuring instrument has been opened provided this
WARRANTY
If in addition to the warranty service necessary repairs, adjustments or similar are carried
out, the warranty services are free of charge but there is a charge for other services such as
transport and packaging costs.
Other claims, especially those for damage occurring outside the instrument are not included
unless responsibility is legally binding.
After-sales service after the warranty time has elapsed
We are, of course, there for you after the warranty time has elapsed. In the case of function
faults please send us your measuring instrument with a brief description of the defect.
Include your telephone number should we need to contact you.
Our CUSTOMER SERVICE puts the customer first.
The warranty time for the FA 300-2 Ex is 12 months for the instrument, 6 months for
accessory parts. Warranty services do not extend the warranty time.
.
Consultation
Sales
Customer Service
Trainings
Zindelsteiner Straße 15
D-78052 VS-Tannheim
Tel. +49 (0) 77 05 - 9 78 99-0
Fax +49 (0) 7705 - 9 78 99-20
info@cs-instruments.com
www.cs-instruments.com
Am Oxer 28c
D-24955 Harrislee
Tel. +49 (0) 4 61 - 700 2025
Fax +49 (0) 461 - 700 2026
info@cs-instruments.com
www.cs-instruments.com
CONTACT
SALES OFFICE SOUTH
SALES OFFICE NORTH
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