Oldham olct 80 User manual

TECHNICAL MANUAL
Ref.:
CD00004
Code: 06_MT_OLCT80_GB_24_11_06

3
GAS DETECTION
We are delighted that you have chosen an ISC/OLDHAM instrument and would like to thank you for your
choice.
We have taken all the necessary measures to ensure that your instrument provides totalsatisfaction.
Now it is important to read this document carefully.
E
EX XT TE EN NT T O OF F R RE ES SP PO ON NS SI IB BI IL LI IT TY Y
*ISC/OLDHAM declines its responsibility towards any person for material damage, physical injury or death
resulting wholly or partly from inappropriate use, installation or storage of its equipment resulting from failure to
observe instructions and warnings and/or standards and regulations in force.
*ISC/OLDHAM neither supports nor authorises any company, physical or moral person to assume responsibility on
behalf of ISC/OLDHAM , even if it is involved in the sale of ISC/OLDHAM products.
*ISC/OLDHAM cannot be held responsible for direct or indirect damage or be required to pay direct or indirect
compensation resulting from the sale or use of any ofits products IF THESE PRODUCTS HAVE NOT BEEN
DEFINED AND CHOSEN BY ISC/OLDHAM FOR THEIR SPECIFIC USE.
C
CL LA AU US SE ES S C CO ON NC CE ER RN NI IN NG G P PR RO OP PE ER RT TY Y
*Drawings, plans, specifications and information included in this document contain confidential information that is
the property of ISC/OLDHAM
*None of this information may be reproduced, copied, divulged or translated, by physical, electronic or any other
means, nor used as the basis for the manufacture or sale of ISC/OLDHAM equipment or for any other reasons
without prior consent from ISC/OLDHAM
W
WA AR RN NI IN NG GS S
*This document is not contractually binding. In the interests of its customers, ISC/OLDHAM reserves to modify the
technical specifications of its equipment without notice, in order to improve its performance.
*READ THIS MANUAL CAREFULLY BEFORE FIRST USE OF THE EQUIPMENT: this manual must be
read by any person who is or will be responsible for using, maintaining or repairing this equipment.
*This equipment will only provide the announced performance levels if it is used, maintained and repaired
according to ISC/OLDHAM directives, by ISC/OLDHAM personnel or by personnel approved by
ISC/OLDHAM
G
GU UA AR RA AN NT TE EE E
2 years guarantee in normal conditions of use on parts and technical labour, return in our workshops, excluding
consumables (sensors, filters, etc.)

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Figure 1: Electrical connections, transmitter connected to an
ISC/OLDHAM
central unit.
The
-
(OUT) terminal ofj5 is at the same potential as the V
-
power supply terminals of j1 (line A) andj2 (line B).
+
-
S
E
S
E
IN 1 IN 2
4 -------- 20 mA
OUT
NO
NF C
NO
NF C
NO NF C
def
rel 1
rel 2
V+ / V-= sensor power supply
+ of j5 = signal output to
central measurement unit
The contact positions correspond to "sensor de-energerised"
(volt free relay)
fault relay
Alarm 1 relay
Alarm 2 relay
j1
0V
+
-
V-
V+
RS485
Line A
j2 0V
+
-
V-
V+
RS485
Line B
j5
IN 1 and IN 2
analogue inputs
(4 …. 20 mA)
RS485 link
(to next sensor in loop)
OUT :4 … 20 mA analogue output
(to measurement unit)
RS485 :Digital signal
(to measurement unit)
Power supply to
next sensor

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Figure 1b: Electrical connections, stand-alone transmitter
The
-
(OUT) terminal ofj5 is at the same potential as the V
-
power supply terminals of j1 (line A) andj2 (line B).
+
-
S
E
S
E
IN 1 IN 2
4 -------- 20 mA
OUT
NO
NF C
NO
NF C
NO NF C
def
rel 1
rel 2
Sensor power supply
The contact positions correspond to "sensor de-energerised"
(no potential on contacts)
Disturbance relay
Alarm 1 relay
Alarm 2 relay
j1
0V
+
-
V-
V+
RS485
Line A
j2 0V
+
-
V-
V+
RS485
Line B
j5
IN 1 and IN 2
analogue inputs
(4 …. 20 mA)
RS485 link
(to next sensor in loop)
OUT :4 … 20 mA analogue output
(to measurement unit)
RS485 :Digital signal
(to measurement unit)
Power supply to
next sensor

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Figure 2
Earth connection
M44, pitch of 1
Possible mounting
TITLE OVERALL DIMENSIONS DRAWING
TRANSMITTER OLCT80 AD
SCALE IDENTIFICATION NO.
DRAWN BY:
CHECKED BY:
APPROVED BY:

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Figure 3
SENSOR OLCT80 + IR SENSOR

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Figure 4
Cable length: 15 m max.
M44, pitch of 1
Possible mounting
TITLE OVERALL DIMENSIONS DRAWING
TRANSMITTER OLCT80 REMOTE
SCALE IDENTIFICATION NO.
DRAWN BY: CHECKED BY: APPROVED BY:

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FIGURE 5
Example of an OLCT 80 transmitter fitted with an integrated measuring
head and two auxiliary inputs.
FIGURE 6
Example of an OLCT 80D transmitter fitted with a remote measuring head
and two auxiliary inputs.

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NOT SOLDERED
Programming solder point ( pps ) SOLDERED
Figure 7
Programming of the auxiliary inputs (IN1 and IN2)
Connection of a 4 … 20 mA detector (2 wires)
IN 2IN 1
pps1
pps2
pps4
pps3
pps7 pps8
pps1
pps2
pps4
pps3
pps7 pps8
IN 2IN 1
Connection of a 4 … 20 mA detector (4 wires)
Power the input detector either:
-via V+ and V-of the OLCT80
-or via a separate power supply unit
Power the input detector either:
-via V+ and V-of the OLCT80
-or via a separate power supply unit
pps1
pps2
pps4
pps3
pps7 pps8
pps1
pps2
pps4
pps3
pps7
pps8
Connection of a 4 … 20 mA detector (3 wires)
IN 2IN 1
pps1
pps2
pps4
pps3
pps7 pps8
Connect the negative ( 4 … 20 mA ) of the input
detector to the negative ( V-) of the OLCT80
pps1
pps2
pps4
pps3
pps7 pps8
Connect the negative ( 4 … 20 mA ) of the input
detector to the negative ( V-) of the OLCT80

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CONTENTS
I. PRESENTATION .................................................................................... 12
1. General....................................................................................................................................................................................12
II. INSTALLATION..................................................................................... 12
1. Mechanical installation........................................................................................................................................................12
2. Electrical installation............................................................................................................................................................12
III. FIRST START-UP................................................................................... 13
1. Visual information................................................................................................................................................................13
1.1. At start-up:........................................................................................................................................................................13
1.2. During normal operation:...............................................................................................................................................13
1.3. If a fault occurs:...............................................................................................................................................................13
1.4. Information accessible on the display via the remote control:................................................................................13
2. OLCT80 transmitter menus.................................................................................................................................................14
IV. MAINTENANCE..................................................................................... 18
1. Periodic maintenance...........................................................................................................................................................18
1.1. Calibration........................................................................................................................................................................18
2. Replacing a sensor block (all versions).............................................................................................................................19
3. Scrapping of OLCT80..........................................................................................................................................................19
V. LIST OF REPLACEMENT PARTS........................................................ 19
1. Flameproof sensor blocks....................................................................................................................................................19
2. Intrinsically-safe sensor blocks ..........................................................................................................................................20
VI. LIST OF ACCESSORIES........................................................................ 21
VII. LIST OF SPARE PARTS......................................................................... 22
VIII. MARKING AND SPECIAL INSTRUCTIONS FOR USE OF THE OLCT
80 IN EXPLOSIVE ATMOSPHERES..................................................... 23
IX. SPECIFICATIONS.................................................................................. 25
X. REMOTE CONTROL UNIT IR20 –START-UP AND USE................... 27
1. Presentation............................................................................................................................................................................27
2. Start-up, Use, Maintenance.................................................................................................................................................27
3. Special Instructions for Use in ATEX Explosive Atmospheres...................................................................................28
XI. CHARACTERISTICS OF THE JBUS COMMUNICATION MODE..... 28
1. ASCII mode...........................................................................................................................................................................28
2. BINARY mode......................................................................................................................................................................29
XII. CERTIFICATION OF ATEX APPROVAL............................................ 30