Gas Detection GDA 4360 User manual

GDA 4360
Operating Manual
Carbon Dioxide Sensor
Hardware Version 11
© Copyright Gas Detection (Australia) Pty Ltd Sep 2015

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Precautions:
To avoid instrument damage and potential dangerous accident; do not use this product before reading
the manual.
Introduction:
The GDA 4360 is designed for use in safe area applications. It uses the latest laser semiconductor
technology for detection of carbon dioxide. The sensor and electronics are one homogenous unit and
must never be separated. It has an analog output which can be set to 4-20mA, 0-20mA, 0-10V or 0-5V.
Specifications:
Target Gas: Carbon Dioxide (CO2)
Range: 0-2000ppm; 0-10000ppm; 0-5% vol; 0-20% vol; 0-100% vol
Operating Voltage: 24 V DC
Output Type: 4-20mA (Standard), 0-20mA, 0-10V or 0-5V (User Specified)
Current Draw: 150mA peak @ 24V
Wiring: 3 core wire with overall screen with current carrying capability to suit cable
length of cable run, Screen must be connected to the Earth connection on the
connector P1.
Operating Temp Range: -20°C to +50° C
Humidity Range: 5-95%RH peak non condensing
Accuracy of Reading: +- 2% FSD +-0.5% reading @STP
Warm Up Time:< 4 min
Speed of Response: < 24 sec
Zero Drift: <0.5% FSD for 90days @STP
Calibration Drift: <0.5% FSD for 90 days @STP
Enclosure: Clipsal 2000 series 116 x 75 x 13 mm (L, W, D) in wall depth 40 mm
IP Rating of enclosure: IP50
Cable Entry: Rear
Operating Air Pressure: 950 to 1050 hPa

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Installation:
The sensor is rated IP50 and therefore suitable for indoor use only. If it is going to be used in external
environments seek specialist advice from GDA. The sensor should not be exposed to steam or saturated
water vapour.
Carbon Dioxide is heavier than air and therefore will (if there is no air movement) fall to lower levels. The
recommended minimum installation height above the floor is 300mm.
Mount the sensor as close as possible to where the leak of the gas being detecting may occur as the
distance from a potential leek effects the time taken to detect it. The further from the potential leeks the
more the gas will be diluted. Take into account drafts and air movements when mounting the sensor.
Fit using the four fixing holes in the corners of the box. When drilling avoid any vibration of the sensor
unit. The laser diode sensing unit is very sensitive. Do not expose the sensor to any mechanical shock.
IT IS VERY IMPORTANT THAT THE GDA 4360 IS INSTALLED IN THE MOST UPRIGHT POSITION AGAINST A
VERTICAL STRUCTURE
DO NOT EXPOSE THE SENSOR FACE TO DIRECT WATER DROPLETS OR CONDENSING ATMOSPHERES
GDA 4360 SENSOR INSTALLATION POSITION
___________________________________________________________________________________
YES
NO
NO

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Operation:
When power is applied the sensor goes through a power up procedure as detailed below. Please note
that the current o/p is not valid for approximately 2-4 minutes from the power being applied.
During the 2-4 minute power up the current output of the GDA 4360 may reach the full scale of the set
output. Ensure that this does not affect external equipment.
LED
LED STATE
FUNTION
ON
Power is present
OFF
Power is not present
GREEN ON, BLUE
FLASHING
The sensor is in its warm up period (approx 2~4 mins)
during this period the sensor o/p is 0.45mA
GREEN ON, BLUE
FLASHING
Normal operation the sensor has stabilised and the 4-
20ma reflects the amount of gas present
GREEN & RED ON
This indicates a fault associated with the sensor. The o/p
current is reduced to 1.2ma
LED Indicator Location: Colours:

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Electrical installation:
The sensor electrical connection is on the rear of the faceplate via a 4 pin polarised plug on the PCB.
The sensor is to be wired with a 3 core cable with an overall screen with current carrying capability to suit
cable length of cable run. Screen must be connected to the Earth connection on the connector P1. The
enclosure is platted with a layer of conductive chrome which is connected to the earth terminal on the
PCB.
The 4-20mA O/P is to be connected to the 4-20mA input of the control board.
4-20mA O/P
0V DC
+24V DC
EARTH
Protection
Cover Plate
Power and
Output
Connector
P1

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Output Operations:
Current or Voltage 0-20mA, 4-20mA, 0-5V, 0-10V Configuration:
This output will generate a current or voltage output reflecting the full scale of the sensor. This output is
factory set and calibrated to the user’s specified requirements at point of purchase.
If an output type was not specified by the user at time of purchase the default setup is set and calibrated
to 4-20mA. This is user adjustable out in field but will not be as accurate to what it was originally
calibrated to from factory.
The 4-20ma will drive into a maximum of 680Ω load impedance (line and input impedance) at 24V.
Be cautious when handling the GDA 4360 as there are delicate components that can easily be damaged
by static discharge. Always observe anti static precautions.
To change the output:
1. Isolate the GDA 4360 by removing the incoming power source connector (P1) from the rear of the
board
2. Adjust jumper pins to the desired output configuration (see Table below)
3. Ensure output is configured for the changed output option
4. Revert to normal operation
Output Type
P2 Jumper Configuration (IN or OUT)
P2 Jumper Location
1
Sen
Pwr
2
MCU
Pwr
3
HS/FS
4
0/4-
20mA
5
V Out
6
Reset
4 - 20 mA (Default as pictured)
IN
IN
IN
IN
OUT
OUT
0 - 20 mA
IN
IN
IN
OUT
OUT
OUT
0 - 5 V
IN
IN
OUT
OUT
IN
OUT
0 - 10 V
IN
IN
IN
OUT
IN
OUT
P2
P3
P2 Jumper
Description
P1
P2 Jumper Location No.:
1 2 3 4 5 6

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Calibration:
Sensors are issued tested & pre-calibrated under controlled lab conditions. Changes to humidity,
temperature, and other environmental factors affect the sensor accuracy and may need a re-set of the
fresh air zero point when introduced to new environments.
The GDA 4360 is an auto calibrating device and under most cases will auto calibrate to new environment
over time
Functional testing may be carried out with a suitable test gas to ensure that the 4-20ma o/p corresponds
with the gas level. This should be undertaken when the unit is fully assembled and using a flow rate of
~0.5L/min of the target gas. Test gas and equipment are available from Gas Detection Australia.
Fresh air Zero point Calibration:
A manual fresh air zeroing (span) of the sensor can be performed when the sensor has been powered for
a minimum of one hour. The fresh air zero can be performed when the sensor is in a known fresh air. The
sensor must be in the fresh air conditions for a minimum of five minutes or until the output has reached a
stable point.
To perform a manual fresh air zero (span) point calibration:
1. Remove the GDA 4360 from the wall to access the back of the sensor unit;
2. Add a jumper to pins 1 and 3 of P3 see picture below, This enters Manual Calibration Mode (see table
for LED sequence);
3. Press and hold the SPAN/ Fresh Air Zero calibration button S1 for 1 to 2 seconds (see table for LED
sequence):
If the Fresh Air Zero was successful (see table for LED sequence)
If the Fresh Air Zero was NOT successful (see table for LED sequence). Repeat step 3
after ensuring that the sensor is in fresh air and stable.
Note: Do not press the ZERO button as it will perform a Nitrogen zero.
4. When successfully zeroed remove the Manual Calibration jumper from header P3 and return to normal
operation.
Mode
LED Light Sequence
Manual CAL Mode
0.5 sec
Alternate Blinking at once per
second
Performing Zero
0.5 sec
Alternate Blinking at once per
second for ~ 4 sec
Zero Successful
0.1 sec
Fast Blink for ~ 2 sec
Zero Failed
Solid for > 2 sec

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Contact Gas Detection Australia for more information if calibration of sensor is required
LED Colours:
SPAN/ Fresh Air Zero
calibration button S1
Manual Calibration
Mode: Add a jumper
to pins 1 and 3 of P3
1 3
Use supplied jumper
on pins 18 and 17 of
P3 for Manual
Calibration Mode,
return to this location
only.

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Notes

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Notes

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Notes
Thank You for Supporting
Australian Manufactured
Products

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