Uniphos 500DT Bedienungsanleitung
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UNIPHOS–500DT
Digital Transmitter
Uniphos Envirotronic Pvt. Ltd.
Readymoney Terrace,
167, Dr. Annie Besant Road,
Worli, Mumbai - 400 018.
India
INSTRUCTION MANUAL
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INDEX
PG NO.
A. Introduction:
4
B. Installation:
6
Overview
6
Selecting Location
7
Mounting guideline
8
Installation
10
4-20mA Loop installation
12
Relay Cable guideline
12
Power Supply & Signal (4-20mA)
13
Settings
15
C. Operation:
19
Gas alarm Conditions & Advice
20
Fault alarm Conditions & Advice
21
D. Calibration:
22
Guidelines
22
Calibration procedure
22
Calibration Diagnostics Protection
24
Important Notes
25
E. Other Settings:
25
F. Maintenance:
26
Cleaning a Sensor
Clearing a Sensor
Caution Notes
G. Trouble shooting guide:
27
H. Specifications:
28
I. List of gases available:
30
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Warning
Inappropriate use, maintenance or servicing may
affect the function of the device and thereby
seriously compromise the user's life.
Before use the product operability must be verified.
The product must not be used, if the function test is
unsuccessful, it is damaged, a competent
servicing/maintenance has not been made, genuine
UNIPHOS spare parts have not been used.
Remove and reinstall sensors carefully, ensuring that
the components are not damaged; otherwise the
approval may be adversely affected, wrong readings
could occur, and persons relying on this product for
their safety could sustain serious personal injury or
death.
Attention!
The device must be installed only in compliance with
the applicable regulations, otherwise the safe
operation of the instrument is not guaranteed.
Test gas concentration has to be checked and device
has to be calibrated, if the range is changed.
After completion of life cycle of this instrument,
dispose it in accordance with federal, state and
local environmental control regulations.
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A.Introduction:
The UNIPHOS range of gas transmitters provide comprehensive
monitoring of flammable, toxic & Oxygen gas hazards in potentially
explosive atmosphere, both indoor & outdoor.
“Uniphos-500DT” KwikSense-Lite the gas transmitter provides
continuous monitoring of the atmosphere for hazardous gases in the
workplace and is virtually maintenance-free. Its revolutionary
design utilizes advanced microcontrollers and allows for enhanced
diagnostics and fault analysis. Advanced design features make
installation and operation simpler than ever, saving you time &
money. Sensor modules are available for variety of flammable gases,
toxic gases & Oxygen. Plug in sensor replacement is extremely easy
operation.
The transmitter provides 4-20mA output signal which can be connected
to any control system like DCS, PLC etc. Designed with non-volatile
memory, the transmitters have total memory retention capacity. There
is provision to have mute function of the internal relay contacts
during the maintenance.
Users can modify transmitter operation using the LCD/OLED & magnet
switches without ever needing to open the unit. Magnetically coupled
non-intrusive calibration can be easily performed by one person with
ease. Normally, only a periodic calibration check is needed to assure
dependable performance.
The LCD/OLED is an intuitive user interfaces, indicating the
following:
•Model name & Sr. No.
•Gas name being monitored and concentration level in ppm, %LEL
or % V/V unit etc.
•Alarm levels (which are user settable viz. Low and High).
•Date of last calibration.
•Prompt to apply the zero gas & span gas during the calibration
mode.
•Indication if a toxic or combustible gas sensor has “failed”
in the self test or sensor absent.
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Modular design of this product helps user to have ease in
installation, operations & maintenance throughout the product life.
It has integral mounting plate consisting of four holes on the
transmitter body for easy mounting. The transmitter may be fixed
directly to a surface on the walls or similar support structure.
On activation of the power supply to the transmitter; within few
seconds it recognizes the sensor plugged into it, tests it and resume
operation.Incompatible sensors are detected by the intelligence
inside and appropriate user prompting is provided on the display.
All the transmitters are supplied pre-configured & optionally
include one alarm relays. The relay operation, alarm set points,
Date Time can be adjusted using the transmitter’s LCD/OLED and non-
intrusive magnetic switches. Outputs are automatically inhibited
during adjustments there by reducing the risk of false alarm at the
control panel during maintenance.
The transmitter unit ensures easy installation and the fastest
routine operation by removing the need for hot work permits in
hazardous areas. Using easy to replace plug-in* sensor modules,
downtime is also reduced and on-going costs are minimized.
The sensors have proven history of reliable, long term performance
and are relatively unaffected by ambient temperature & humidity
variations. Gas enters the transmitter‘s sensor by convection and
diffusion through a sintered stainless steel or wire mesh screen at
the opening of the sensor housing. The transmitter is capable of
responding to a momentary puff of gas that would otherwise remain
undetected.
The transmitter’s explosion proof design allows operation in areas
where the combustible gas concentration may exceed the lower
explosion limit (LEL). Its rugged construction ensures a long life
span in almost any environment.
The transmitter incorporates the best of both proven and new
technologies that offer versatility in addition to reliable safety
mechanism. It is most cost effective product for new and retrofit
applications.
Note: * KwikSense-Lite support smart sensor, however the
Swappability is limited only to the same Gas and its variant.
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B. Installation
Various parts of the gas transmitter are shown in the following
diagram.
Figure 1. 500 DT Transmitter overview
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Selecting Transmitter Location:
Select the most suitable locations for each transmitter. Several
factors should be considered when selecting location to install the
gas transmitter. The following general suggestions should be
considered.
•Air current: if there are fans, wind or other sources of air
movement, gases may tend to rise or collect in certain areas
of a facility. The local air currents should be assessed to aid
in selecting the sensor locations. Outdoor situation
considerations, such as prevailing winds, should be accounted
for. Air convection can often be more important in determining
gas concentrated areas than factors of vapor density.
•Vapor Density: When there are no air currents in the area, for
gases lighter than air we suggest placing the sensor
approximately 12” (30 cm) above the level of a potential leak
source or near the roof in indoor installation. For gases
heavier than air, we suggest placing the sensor 12”(30 cm)
below the level of a potential leak source or near the floor
or ground. Gases with density equal to air or slightly greater
than air tend to rise particularly when the air currents are
present.
•Gas emission source: as a rule, at least one sensor should be
located in close proximity to each point where leak is likely
to occur. This is particularly important when a liquid with low
volatility is being monitored.
•Environmental factors: Consider the following in selecting the
location
(i) Install sensors where they are protected from wind,
dust, snow, water, vibrations and shock.
(ii) Observe the temperate & pressure variation
surrounding the desired location. It should be within
the specified operating temperature & pressure of the
gas transmitter.
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Mounting Guideline:
Modular design of the product simplifies the installation procedure.
The Transmitter unit has two electronic circuit boards Viz. main
processor board & relay board. Power supply & signal (4 -20 mA)
connector is located on the bottom Relay board. NO-C-NC contacts of
all the three Relays are provided on the green connectors located
on the one side of the bottom board. LCD/OLED display is plugged
on the top board & secured with screws. Certified Explosion proof
(Exd) enclosure of the unit is having provision for 3 openings for
cable entries & connections. They are to be used as following (Refer
fig.2)
•Opening on the Right hand side is equipped with 1/2” NPT/ M20
conduit fitting outlet. Use certified cable gland for cable
entry. This entry is to be used for the power supply & signal
cable connections.
•Opening on the Left hand side is equipped with 1/2” NPT/ M20
conduit fitting outlet. Use certified cable gland for cable
entry. It is to be used for the Relay cable entries.
•One opening on bottom side is occupied by the sensor housing
(sensor adaptor).
•If any one of the cable entries is not used, make sure to close
it by using certified stopper.
The transmitter may be disassembled by removing the Top Processor
board in order to get easy access to the bottom board, simplifying
the installation and field wiring.
Caution: Qualified personnel should perform the installation
according to applicable electrical codes, regulations and safety
standards. Ensure correct cabling and sealing, fitting practices
are implemented.
Install the transmitter on the predrilled mounting flange. It is
preferable to attach the transmitter to a wall or bracket, using
bolts through diagonal mounting holes, and ensure mounting is done
properly and there is no loose fitment.
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Figure 2. Outline drawing. (Front & side views with outline
dimensions)
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Installation:
Transmission Range: The distance that the 4-20 mA signal can travel
is dependent on several factors including the cable gauge. Maximum
cable resistance allowed is 600 ohm less the controller resistance.
Assume a constant 24 VDC power supply (at 20 Deg C), copper wire and
a controller resistance of 250 ohm. The signal range from the
controller to the transmitter takes into account the return loop.
Note: The Uniphos-500 Series Controllers have a resistance of 100
ohm maximum.
Maximum cable lengths between the controller & transmitter:
The table give below is for guidance only. Users should calculate
maximum distances using actual data for the cable being used.
Typical calculations assume minimum guaranteed controller supply of
24 VDC, minimum detector voltage of 18 VDC & maximum power supply
under full alarm.
Table: 01
Typical cable data
Maximum cable length
Cable size
(Cross section)
Cable
Resistance
Catalytic
EC
IR
Ω/km
meters
meters
meters
0.5 mm2 (20AWG)
36.8
356
478
420
1.0 mm2 (17AWG)
19.5
671
902
793
1.5 mm2 (16AWG)
12.7
1031
1384
1217
2.0 mm2 (14AWG)
10.1
1296
1741
1531
2.5 mm2 (13AWG)
8
1636
2197
1932
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