D-Guard
2
65
25.1.3
Carbon Dioxide Detector Specifications
Parameter
Specification
CSS-1
Gas Type
Carbon Dioxide INFRA-RED
CSS-2
Detection ranges
0 – 1.5% v/v
CSS-3
Sensor technology
NDIR Infra-Red
CSS-4
Sensor Size
20mm diameter
CSS-5
Sensor Life
>10 Years
CSS-6
Calibration method
2 point, zero, full-scale
CSS-7
Accuracy (scale and linearity)
To AS2290.3, ANZ60079.29 and AS4641
CSS-8
Stated accuracy temperature limits
0°c to +40°C
CSS-9
Operating temperature limits
-10°C to +40°C
CSS-10
Operating humidity range
0% to 98%
CSS-11
Operating pressure range
80kPa to 120kPa
CSS-12
Humidity/Condensation effects
Negligible
CSS-13
Cross Sensitivity
CO: none. NO: none. H
2
: none
CSS-14
Response time
T90: < 30 seconds
CSS-15
Environmental protection
Replaceable hydrophobic membrane (part of enclosure).
25.1.4
Electro-Chemical Detector Specifications * Cell dependant
Parameter
Specification
TSS-1
Sensor technology
Amperometric electro-chemical cell
TSS-2
Sensor Size
20mm diameter
TSS-3
Sensor Life
Typically 2 Years to 80% of ‘new’ output signal
TSS-4
Calibration method
2 point, zero and full-scale
TSS-5
Accuracy (scale and linearity)
To AS2290.3, ANZ60079.29 and AS4641
TSS-6
Stated accuracy temperature limits
-20°c to +40°C
TSS-7
Operating temperature limits
-20°C to +50°C
TSS-8
Operating humidity range
15% to 90%
TSS-9
Operating pressure range
80kPa to 120kPa
TSS-10
Pressure effects
Negligible for steady state above or below 101.3kPa
TSS-11
Humidity effects (uncompensated)
Negligible for steady state above or below 60% RH
TSS-12
Long term drift
Zero: Less than 0.01ppm to 0.5ppm per 12 months (cell type and environment condition dependant)
Sens: Typically less than 3% of scale per 12 months
TSS-13
Cross Sensitivity
Refer to Specific sensor data sheet.
TSS-14
Typical response Time t50
<=10 seconds from step change input *
TSS-15
Typical response Time t90
< 25 seconds from step change input *
25.1.5
Mechanical & Environmental Specifications
Parameter
Description / Conditions
Limits
Units
Min
Max
MS-1
Enclosure material
Antistatic carbon filled Delrin
MS-2
Enclosure construction
Injection Moulded
MS-3
Enclosure wall section
Wall thickness
6.5
7
mm
MS-4
Enclosure IP Rating
IP66 & IP67 / IP68 (G and R versions) IP65 (S version)
MS-5
Enclosure Lid Retainer
Not Retained
MS-6
Enclosure Lid Fixing
Four corner screws (4mm Hex Heads)
MS-7
Cable Glands
Provision for up to 3 x 20mm nylon or chrome plated steel
MS-8
Enclosure Footprint
As per present D-Guard Detector.
MS-9
Storage Temperature
Non powered state
-20
60
°C
MS-10
Operating Temperature
Temperature limits outside which cell failure may occur
-20
55
°C
MS-11
Operating Humidity
Non condensing
15
90
%rh
