I
I
X
X
.
.
T
T
E
E
C
C
H
H
N
N
I
I
C
C
A
A
L
L
C
C
H
H
A
A
R
R
A
A
C
C
T
T
E
E
R
R
I
I
S
S
T
T
I
I
C
C
S
S
1
1
.
.
M
M
X
X
2
2
1
1
0
0
0
0
a
a
p
p
p
p
l
l
i
i
a
a
n
n
c
c
e
e
Manufacturer: OLDHAM
Function: Multi-risk gas detector
Type: MX 21OO
Configuration:
• One to four cells (explosimetric, electrochemical, semiconductor, infrared (CO2) or katharometric cells)
Gases detected: Explosive gases, toxic gases and oxygen
Measurement: continuous on all cells in operation
Cell:
• Intelligent, precalibrated interchangeable unit
• automatic recognition by the appliance by means of EEPROM
Display unit:
• Graphic LCD
• Messages in uncoded mode, with backlighting
Display lighting: with time switch
Switching of explosimetric ranges
• Automatic, from "% Gas" scale to "% Volume" scale
Cell fault
• Indication by indicator light
• Message in uncoded mode
• Corresponding display "frozen". Other channels operational
• Continuous general audio and visual alarm
Battery fault
• Display in uncoded mode
• Continuous general audio and visual alarm
Operating check
• Automatic calibration on request (optional)
• Self-test on power-up
• Audio and visual signal every 2 minutes (factory)
• Display of measured values in uncoded mode
Alarms
• Explosimetry: 2 adjustable instantaneous thresholds in 0-60 % LEL range
• Oxygen metering: two adjustable instantaneous thresholds over the cell's whole measuring scale (over-
oxygenation and under-oxygenation)
• Toxic gas metering (by cell)
• Two adjustable instantaneous thresholds over the whole range:
- one TWA threshold
- one STEL threshold
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