Table of Contents
Advertisement
25.
APPENDIX H:
25.1. Performance Specifications
25.1.1
General Specifications
Parameter
GS-1
Measurement Techniques
GS-2
Target Gas
GS-3
Full Scale Ranges
GS-4
Measurement Accuracy
GS-5
Maximum Loop Current
GS-6
Minimum Supply Voltage at 20mA
GS-7
Maximum Loop Resistance.
GS-8
Absolute Maximum Supply Voltage
GS-9
Loop Error Signal (low – electronics fault)
GS-10
Loop Error Signal (low – sensor fault)
GS-11
Display
GS-12
Temperature Sensor
GS-13
Pressure sensing – Ambient (optional)
GS-14
Sensor keep-alive battery (optional)
GS-15
Digital Communications
GS-16
Relays (Optional for non-Ex variants)
GS-17
Relay max. contact carry current
GS-18
Relay maximum contact power
GS-19
Relay contact voltage rating switching).
GS-20
Relay healthy operating state.
GS-21
Relay state changes
GS-22
Sounder Output
GS-23
Strobe Output
25.1.2
Methane Detector Specifications
Parameter
MSS-1
Gas Type
MSS-2
Detection ranges
MSS-3
Sensor technology
MSS-4
Sensor Size
MSS-5
Sensor Life
MSS-6
Calibration method
MSS-7
Accuracy (scale and linearity)
MSS-8
Stated accuracy temperature limits
MSS-9
Operating temperature limits
MSS-10
Operating humidity range
MSS-11
Operating pressure range
MSS-12
Humidity/Condensation effects
MSS-13
Long term drift
MSS-14
Cross Sensitivity
MSS-15
Response time
MSS-16
Environmental protection
Description / Conditions
Electro-Chemical Cell, Infra-Red.
Depends upon model (see table 2 – gas types and ranges).
Depends upon model (see table 2 – gas types and ranges).
Refer to Sensor Performance tables.
Under any condition of operation or fault.
Minimum operating voltage at detector
At Vpsu 28V with backlight (see graph).
Maximum supply voltage no damage to electronics (All versions)
Detected faults within hardware or software
IR Head failure
Graphical display 400 pixels by 240 pixels. High contrast type
Semiconductor temperature sensor
MEMS based absolute value. Instrument body and head.
3.6V 55mAH lithium coin cell. PCB mounted 'encapsulated'
HART 7.0 over 2-wire current loop (refer separate specification)
2 x Single Pole Change Over for warn and alarm + 1 fault relay
Non-Switched current handling (Carry Current)
Resistive
Switched contact voltage limit
Normally energised / Normally de-energised (configurable)
User set Gas Level, system fault.
Sound pressure level
Flashing or Steady illumination
Methane INFRA-RED
0 – 5% v/v, 0 – 100% 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 60079.29.1
Sens: Less than specified by 60079.29.1
CO: none. NO: none. H
: none
2
T90: <=22 seconds
Replaceable hydrophobic membrane (part of enclosure).
64
D-Guard
Limits
Min
-
-
-
-
13.0
-
-
-
-
-20
50
-
10
1,200
-
240/30
-
-
Specification
2
Units
Max
-
-
-
-
-
-
30
mA
-
VDC
720
Ohms
30
VDC
3.3
mA
3.3
mA
-
-
+110
ºC
115
kPa
A
VA
V AC/DC
98
dB
-
-
Advertisement
Table of Contents
