Carbon Dioxide Detector Specifications; Electro-Chemical Detector Specifications; Mechanical & Environmental Specifications - GasTech D-Guard2 Operator's Manual

24.1.3

Carbon Dioxide Detector Specifications

Parameter
SS-1 Gas Type
SS-2 Detection ranges
SS-3 Sensor technology
SS-4 Sensor Size
SS-5 Sensor Life
SS-6 Calibration method
SS-7 Accuracy (scale and linearity)
SS-8 Stated accuracy temperature limits
SS-9 Operating temperature limits
SS-10 Operating humidity range
SS-11 Operating pressure range
SS-12 Humidity/Condensation effects
SS-13 Long term drift
SS-14 Cross Sensitivity
SS-15 Response time
SS-16 Environmental protection
24.1.4

Electro-Chemical Detector Specifications

Parameter
SS-1 Sensor technology
SS-2 Sensor Size
SS-3 Sensor Life
SS-4 Calibration method
SS-5 Accuracy (scale and linearity)
SS-6 Stated accuracy temperature limits
SS-7 Operating temperature limits
SS-8 Operating humidity range
SS-9 Operating pressure range
SS-10 Pressure effects
SS-11 Humidity effects (uncompensated)
SS-12 Long term drift
SS-13 Cross Sensitivity
SS-14 Typical response Time t50
SS-15 Typical response Time t90
24.1.5 Mechanical & Environmental Specifications
Parameter
Enclosure material
Enclosure construction
Enclosure wall section
Enclosure IP Rating
Enclosure Lid Retainer
Enclosure Lid Fixing
Cable Glands
Enclosure Footprint
Storage Temperature
Operating Temperature
Operating Humidity
Carbon Dioxide INFRA-RED
0 – 1.5% v/v
NDIR Infra-Red
20mm diameter
>10 Years
2 point, zero, full-scale
To AS2290.3, ANZ60079.29 and AS4641
0°c to +40°C
-10°C to +40°C
0% to 98%
80kPa to 120kPa
Negligible
Zero: Less than specified by 61779.2 over 3 months
Sens: Less than specified by 61779.2 over 3 months
CO: none. NO: none. H : none
2
T90: < 30 seconds
Replaceable hydrophobic membrane (part of enclosure).
Amperometric electro-chemical cell
20mm diameter
Typically 2 Years to 80% of 'new' output signal
2 point, zero and full-scale
To AS2290.3, ANZ60079.29 and AS4641
-20°c to +40°C
-20°C to +50°C
15% to 90%
80kPa to 120kPa
Negligible for steady state above or below 101.3kPa
Negligible for steady state above or below 60% RH
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
Refer to Specific sensor data sheet.
<=10 seconds from step change input
< 25 seconds from step change input
Description / Conditions
Antistatic carbon filled Delrin
Injection Moulded
Wall thickness
IP66 & IP67 / IP68
Not Retained
Four corner screws (4mm Hex Heads)
Provision for up to 3 x 20mm nylon or chrome plated steel
As per present D-Guard Detector.
Non powered state
Temperature limits outside which cell failure may occur
Non condensing
64
D-Guard
Specification
Specification
Limits
Min Max
6.5
-20 60
-20 55
15 90
2
Units
7 mm
°C
°C
%rh