DALEMANS octoPRO Use and care manual

CAN Bus System
Calibration manual for
Toxic & Flammable gases detectors
Gas detection
w w w . d a l e m a n s – d e t e c t i o n . c o m

Gas detection
Responsibilities – Warranty
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The installation must be carried out by qualified personnel.
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installation, the use or the maintenance of this product. By respecting these instructions you guarantee
your safety and that of the occupants of the buildings or the installations to be protected.
Installation, use and maintenance of every apparatus described in this handbook must be performed
in strict accordance with remarks, warnings, instructions and operational limits detailed in this manual.
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accordance with the instructions of this manual and the regulations in force.
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performed in accordance with procedures described in this manual and carried out by Dalemans
technical service or by Dalemans entitled personnel.
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instructions.
Use only Dalemans original parts when you assume the maintenance of the material as described in
this manual otherwise the performances of the apparatus may be seriously impaired.
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avoid possible water or polluting agent's projections.
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TABLE OF CONTENTS
Can Bus Gas Detectors
Calibration
1. INTRODUCTION .................................................................................1
2. GAS DETECTOR CALIBRATION.......................................................2
2.1. Toxic gases & oxygen detector (DTX CAN)...................................................... 2
Zeroing the DTX CAN.................................................................................. 3
Adjusting gain of DTX CAN..........................................................................3
2.2. Flammable gases detector (DEX CAN transmitter)..........................................4
Set the cell operating voltage....................................................................... 5
Zeroing the DEX CAN..................................................................................6
Adjusting gain of DEX CAN..........................................................................6
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1. INTRODUCTION
In order to mitigate the loss of sensitivity, the gas detection equipment must be calibrated at least once a year, in
some cases three to four times a year or even more.
The calibration is carried out by the manufacturer or his local representative.
Gas detectors must be calibrated with a calibration gas according to the gas to be detected.
Calibration must be performed according to the rules of use and by qualified personnel trained by
Dalemans exclusively.
For further information about the conditions and the procedure of calibration of the gas detectors do not hesitate to
contact Dalemans :
Tel. : +32 (0) 19 • 54 • 52 • 36
Fax. : +32 (0) 19 • 54 • 55 • 34
Email : [e-mail]
In a Dalemans CAN bus system based on OctoBUS 64 central measuring unit, to perform the complete calibration
procedure of the detectors you need the hand held device OctoPRO or a computer with OctoBUS Configurator
software installed.
Figure 1 : OctoPRO Figure 2 : OctoBUS Configurator
OctoPRO and OctoBUS Configurator are optional features and are delivered by Dalemans only. For any request
regarding to these two products please contact Dalemans.
The following instructions give the calibration procedure with OctoPRO device. For more information about the use
of the OctoPRO device please refer to the related instruction manual.
The calibration procedure by mean of a computer is described in the OctoBUS Configurator Instruction Manual.
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2. GAS DETECTOR CALIBRATION
For gas detectors, calibration consists in placing the sensor cell of the detector in an atmosphere made up of air
and calibration gas.
According to the surrounding atmosphere conditions, applying pure air (zero gas) to the sensor cell may be
necessary.
2.1. Toxic gases & oxygen detector (DTX CAN)
To perform a correct calibration of the DTX CAN detector you need :
1. A zero gas cylinder (pure air or Nitrogen);
2. A calibration gas cylinder (concentration between 1/3 and 2/3 of measuring range);
3. A pressure reducer with flowmeter;
4. An injection cap (Figure 4);
5. A Teflon or polyurethane flexible hose (Ø 7mm);
6. An insulated flat screwdriver (width 1mm).
In order to avoid ambient air or air currents from corrupting the calibration atmosphere around the cell always use
the suitable injection cap. Just place it instead of the metal detection head cap and fix its position by mean of the
fastening screw (Figure 4
Figure 4 : Injection cap for DTX CAN
). To get the injection cap please contact Dalemans.
To apply zero gas or calibration gas, fix one end of the flexible hose to the cylinder by mean of the flowmeter. Fix
the other end to the injection nozzle.
Flowmeter
Hose Ø7mm
(Teflon or PU)
Fastening screw
Injection nozzle
Injection cap
Cylinde
r
Figure 3 : Zero gas or calibration gas cylinder
To perform calibration always proceed in the following order :
•Set the zero of DTX CAN (Zeroing);
•Adjust sensibility of DTX CAN (Gain).
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F1 : Select Node
F10 : Setup > 2: Module > 1: DTXCAN
F10 : Setup > 1: Range
F3 : Calibration > ENTER
For more information about the use of OctoPRO device refer to the
related Instruction Manual.
Zeroing the DTX CAN
•Detector must have been powered for at
least 24 hours.
•On the cylinder, set flow rate between 0.4
to 0.6 l/min and apply Nitrogen or pure air
for 2 to 3 minutes on the sensor cell.
•From the main menu of the OctoPRO
device, select the detector node address,
then select type of module DTXCAN and
enter the measuring range.
•From the main menu of OctoPRO device
press F3 to select Calibration function.
Press ENTER to start calibration and wait
until procedure completion.
Please refer to the OctoPRO Instruction Manual for measure function.
Figure 5 : Adjusting GAIN on DTX CAN
Adjusting gain of DTX CAN
•Detector must have been zeroed as
described here above.
•On the cylinder, set flow rate between 0.4
to 0.6 l/min and apply calibration gas for 2
to 3 minutes (5 minutes for NH3). For
Oxygen (O2) let the sensor cell at free air.
•Visualize the detector measure on the
OctoPRO display (press F2) or on the
OctoBUS 64 central unit display.
•With the screwdriver gently adjust the
GAIN potentiometer on the DTX CAN so
that the measure reading matches the
applied calibration gas concentration
(29% for O2).
Pure air or Nitro
g
en
Max. 0,6 l/min
Flow rate
Min. 0,4 l/min
DTX CAN
Measure DTXCAN
Dir: 244,26
AVG: 0,00
A
1
.A :
01110000
Calibration
g
as
Max. 0,6 l/min
Flow rate
Min. 0,4 l/min
DTX CAN
GAIN potentiometer
Measure reading on the
OctoPRO display
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2.2. Flammable gases detector (DEX CAN transmitter)
To perform a correct calibration of a flammable gases detector you need :
1. A calibration gas cylinder (concentration between 1/3 and 2/3 of measuring range);
2. A pressure reducer with flowmeter;
3. An injection nozzle;
4. A Teflon or polyurethane flexible hose (Ø 7mm);
5. A voltmeter;
6. A measurement plug (pitch = 2.54mm);
7. An insulated flat screwdriver (width 3.5mm).
To get the injection nozzle or the measurement plug please contact Dalemans.
For applying gas to the detector, the flexible hose has to be plugged at one end to the cylinder flowmeter, and at
the other end to the injection nozzle. The injection nozzle must be fitted in the detection head opening ( ).Figure 8
Figure 8 : Applying gas to the detector
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Figure 6 : Calibration gas Figure 7 : Measurement plug
Cylinder
Flowmeter
Hose
Hose
Injection
nozzle Detection
head
Pitch 2.54mm
eDepending on the type of installation, the DEX CAN transmitter is located in the detector junction box (Figure
9) or inside the OctoBUS 64 central unit (Figure 10).
Figure 9 : DEX CAN detector Figure 10 : DEX CAN transmitter with remote detector
OctoBUS 64 central unit
Remote detecto
r
DEX CAN Transmitter
Detection head
DEX CAN
Transmitter
To perform calibration always proceed in the following order :
1. Set the operating voltage of the cell;
2. Set the zero of DEX CAN (Zeroing);
3. Adjust sensibility of DEX CAN (Gain).

5
Set the cell operating voltage
Operating voltage Usens
Type of
Cell Min. Ideal
Each type of cell has a maximum operating voltage value
not to exceed to prevent cell from quickly becoming
unusable. Max.
DAL17 1.925
2.00
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2.025
DAL50 2.400
2.50
Referring to this table, always adjust the operating voltage
on the "Ideal" value without exceeding the "Max" value. 2.550
VQ41 1.900
2.00
2.050
The type of cell is specified on the marking label on the
detection head of the detector.
eFor the following procedure, the sensor cell as well as the power supply must be connected to the DEX CAN
transmitter. Please refer to the note of installation of the DEX CAN for more information.
Figure 11 : Measuring cell operating voltage on DEX CAN transmitter
•Power on the DEX CAN transmitter and
wait for at least 15 sec.
•Set the voltmeter on Vdc position and
connect it between terminals Aand Pof
the DEX CAN transmitter.
Note: the transmitter terminal block has special
sockets to receive the voltmeter probes or test
plugs with 2.3mm diameter (Dalemans art. code
BOR00000075).
Figure 12 : Measuring cell operating voltage on remote detector
•If the DEX CAN transmitter is remote from
the detector, connect the voltmeter
between terminals Aand Pof the detector
terminal block.
Figure 13 : Adjusting the cell operating voltage
•With the precision screwdriver gently
adjust the "Usens" potentiometer of the
transmitter so that the voltmeter reading
matches the recommended operating
voltage for the type of cell (refer to column
"Ideal" in table here above).
Voltmeter
+ - Special sockets
for probes
Voltmeter
+ -
Remote detector
DEX CAN Transmitter
OctoBUS 64 central unit
Usens
potentiometer
Warning !
Potentiometers
are not multi-turn.
Act SOFTLY.

6
F1 : Select Node
F10 : Setup > 2: Module > 2: DEXCAN
F10 : Setup > 1: Range
F3 : Calibration > ENTER
For more information about the use of OctoPRO device refer to the
related Instruction Manual.
Zeroing the DEX CAN
•Before zeroing, allow the detector to be
powered for at least 15 min.
•Set the voltmeter on mVDC position and
connect it to the DEX CAN transmitter
using the measurement plug.
•With the precision screwdriver gently
adjust the "CAL" potentiometer so that the
voltmeter reading is 0mV ± 0.1mV.
•On the OctoPRO, select the detector
address, then select type of module
DEXCAN and enter the measuring range.
•On the OctoPRO press F3 to select
Calibration function.
•Press ENTER to start calibration and wait
until procedure completion.
Please refer to the OctoPRO Instruction Manual for measure function.
Adjusting gain of DEX CAN
•Detector must have been zeroed as
described here above.
•Visualize the detector measure on the
OctoPRO display (press F2) or on the
OctoBUS 64 central unit display.
•On the cylinder, set flow rate at 0.8 l/min
and apply calibration gas until the
measure reading stabilizes.
•With the screwdriver gently adjust the
GAIN so that the measure reading
matches the applied calibration gas
concentration.
Example :
Cal. gas 2,5% Methane (CH4)
L.E.L. CH4= 5%
Cal. gas = 50% L.E.L.
Æ Measure (Dir) = 50
Voltmeter
+ -
0.00mVDC
Warning !
Potentiometers
are not multi-turn.
Act SOFTLY.
CAL
p
otentiomete
r
Measure DEXCAN
Dir: 38,17
AVG: 0,00
A1.A : 01100000
Measure reading on the
OctoPRO display
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GAIN
potentiometer
Warning !
Potentiometers
are not multi-turn.
Act SOFTLY.
Measure DEXCAN
Dir: 50,00
AVG: 0,00
A1.A : 01110000
Measure
reading
Calibration
g
as
Flow rate = 0
,
8 l/min.
Detector

NOTES
Gas detection

• email:
• internet:
Rue Jules Mélotte, 27
4350 Remicourt • Belgium
• Tel: [phone]
• Fax: [phone]
Gas detection
[email protected]
www.dalemans-detection.com