Dräger REGARD-1 Technical Document

Dräger REGARD-1
Single-channel controller
en Installation, operation and maintenance guide

Contents
Issue 5 - June 2005 Page 3 of 64 Pages
Contents
For your safety ..............................................................................................................7
Intended use..................................................................................................................9
CE marking and ATEX approval ..............................................................................................10
Other tests and approvals .........................................................................................................10
Special conditions for safe use according to EC type examination certificate BVS
03 ATEX G 011 X.................................................................................................11
Description...................................................................................................................12
Main circuit board........................................................................................................................13
Field device connecting terminals.....................................................................................................14
24 V battery terminals.........................................................................................................................15
Maintenance inhibit jumper................................................................................................................15
Fuses.....................................................................................................................................................16
Display board...............................................................................................................................16
Display of measuring range, gas and unit.......................................................................................18
Pellistor board......................................................................................................................................18
Options circuit board ..................................................................................................................19
Installation ...................................................................................................................21
Installation environment.............................................................................................................21
Mounting points...........................................................................................................................21
AC supply.....................................................................................................................................22
Connecting transmitters and measuring heads.....................................................................23
Two-wire 4-20 mA transmitter...........................................................................................................23
Three-wire 4-20 mA transmitter ........................................................................................................23

Contents
Issue 5 - June 2005 Page 4 of 64 Pages
Maximum cable resistance for three-wire-transmitters................................................................. 24
Two-wire 4-20 mA transmitter with safety barrier.......................................................................... 25
Polytron SE Ex (Pellistor) measuring head..................................................................................... 26
Relay outputs...............................................................................................................................27
24 V digital outputs for A1 and A2............................................................................................28
Remote reset input......................................................................................................................29
Configuration and calibration.................................................................................... 30
Set measuring range..................................................................................................................30
Calibrating a 4-20 unit................................................................................................................33
Zero calibration ................................................................................................................................... 33
Span calibration .................................................................................................................................. 33
Calibrating an SE Ex unit...........................................................................................................36
Set the sensor current........................................................................................................................ 36
Zero calibration ................................................................................................................................... 38
Calibrate span..................................................................................................................................... 38
Configuring alarms......................................................................................................................39
A1 alarm............................................................................................................................................... 40
A2 alarm............................................................................................................................................... 41
A3 alarm............................................................................................................................................... 41
Fault alarm........................................................................................................................................... 41
Setting alarm thresholds on 4-20 units............................................................................................ 42
Setting alarm thresholds on SE Ex units......................................................................................... 45
Maintenance................................................................................................................ 48
Fault finding..................................................................................................................................48
Specifications.............................................................................................................. 50

Contents
Issue 5 - June 2005 Page 5 of 64 Pages
Part numbers...............................................................................................................52
EC type-examination certificate.................................................................................53
EC Declaration of Conformity ....................................................................................58
Front panel label..........................................................................................................59
Index.............................................................................................................................61

For your safety
Issue 5 - June 2005 Page 7 of 64 Pages
For your safety
NOTE
Observe the instructions for use
Follow the instructions for installation, operation and
maintenance.
maintenance
The device must be inspected and serviced regularly by trained personnel. Keep a
record of inspections and servicing.
Repairs of this device may only be carried out by competent personnel.
We recommend that either a Dräger Safety training course or a DrägerService service
contract be obtained and that all repairs are carried out by DrägerService.
Refer to EN 50073 and/or local regulations.
Concerning transmitter or measuring head operation and maintenance, refer to the
transmitter operating manual or to the measuring head information.
WARNING!
Not for use in areas where explosion hazards are possible
This device is not approved or certified for installation in
potentially explosive atmospheres.
Liability for proper function or damage
Liability for proper function of the device is irrevocably transferred to the owner or
operator to the extent that the equipment is serviced or repaired by personnel not
employed or authorised by DraegerService, or if the equipment is used in a manner not
conforming to its intended use.

For your safety
Issue 5 - June 2005 Page 8 of 64 Pages
Draeger Safety UK Limited can not be held responsible for any damage caused by non-
compliance with the above recommendations. The warranty and liability provisions of
the terms and conditions of sale and delivery of Draeger Safety UK Limited are likewise
not modified by the recommendations given above.
Draeger Safety UK Ltd

Intended use
Issue 5 - June 2005 Page 9 of 64 Pages
Intended use
Regard–1 single-channel controller for 4-20 mA transmitters
•For stationary, continuous monitoring of flammable or toxic gases and vapours,
oxygen deficiency or enrichment.
•Display of measured gas value.
•Indication of alarms and initiation of countermeasures.
•Indication of time-weighted average value, time-weighted average alarm output and
data logger (requires optional RS-232/TWA alarm circuit board).
Regard–1 single-channel controller for SE Ex measuring heads
•For stationary, continuous monitoring of flammable gases and vapours.
•Display of measured gas value.
•Indication of alarms and initiation of countermeasures.
•Indication of time-weighted average value, time-weighted average alarm output and
data logger (requires optional RS-232/TWA alarm circuit board).
The SE Ex device will not work with the Dräger SE Ex LC measuring head.
Both devices are suitable for use in residential, commercial and industrial environments.
The Regard-1 controller is certified according to the directive 94/9/EC (ATEX Directive)
to be operated with performance approved 4-20 mA transmitters (EC-type examination
certificate BVS 03 ATEX G 011X), or with Dräger SE Ex pellistor measuring heads.

Intended use
Issue 5 - June 2005 Page 10 of 64 Pages
CE marking and ATEX approval
Regard-1 is CE marked to indicate conformity to the following directives:
•“ATEX directive” 94/9/EC
•“EMC directive” 89/336/EEC
•“Low-voltage directive” 73/23/EEC
The control unit also bears the following ATEX marking: II (2) G
WARNING!
THIS MARKING DOES NOT MEAN THAT THE UNIT IS “EXPLOSION
PROOF”.
Regard-1 cannot be used in areas subject to explosion hazards
(“hazardous areas”) without suitable protection.
Other tests and approvals
In addition to the measuring function for flammable gases in the range 0 to 100 %LEL
and for oxygen (inertisation) in the range 0 to 25 %(V/V), Regard-1 has been tested
according to DIN EN 45544-1 combined with DIN EN 45544-2 for toxic gases, and
according to DIN EN 50104 for oxygen enrichment and oxygen deficiency, by EXAM
BBG Prüf- und Zertifizier GmbH, Dinnendahlstrasse 9, 44809 Bochum, Germany.
The "Bericht über die Eignungsuntersuchung" has been issued under PFG-No.
41301303.
In Germany only:
NOTE
Read and consider chapter 5 of the "Bericht über die
Eignungsuntersuchung".