Oldham BM25, Руководство по эксплуатации

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. DESCRIPTION
Manufacturer: INDUSTRIAL SCIENTIFIC-OLDHAM
Function: Multi-risk gas detector
Type : BM25
Configuration:
•
One to four sensors (explosive, electrochemical, infrared (CO
2
) or catharometric sensors)
Gases detected: Explosive gases, toxic gases and oxygen
Measurement: Continuous on all sensors in operation
Sensors:
•
Intelligent, precalibrated, interchangeable units
•
Automatic recognition by the BM25 by means of EEPROM
Display unit:
•
Graphic LCD
•
Messages in uncoded mode, with backlighting
•
“Flip-Flop” function
Display lighting : With time switch upon request, automatic for alarm or fault
Switching of explosive ranges
•
Automatic, from "% Gas" scale to "% Volume" scale
Sensor faults
•
Indication by indicator light
•
Message in uncoded mode
•
Corresponding display "frozen". Other channels operational
•
Continuous general audible and visual alarm
Battery fault
•
Display in uncoded mode
•
Continuous general audible and visual alarm
Operating check
•
Self- test on power- up
•
Visual signal every 2 minutes (factory)
•
Display of measured values in uncoded mode
Alarms
•
Explosives: 2 adjustable instantaneous thresholds in 0-60 % LEL range
•
Oxygen metering: two adjustable instantaneous thresholds over the sensor's whole
measuring scale (over-oxygenation and under-oxygenation) or two optional under-
oxygenation thresholds.
•
Toxic gas metering (by sensor)
- Two adjustable instantaneous thresholds over the whole range
- one TWA threshold
- one STEL threshold