Oldham BM25 User Manual

1 – Introduction
15
Gas sensors
The sensors are located on the front of the monitor (Figure 2, ref. 10). They are smart,
pre-calibrated from factory and interchangeable. They are composed of a sensitive
element and electrical components, including an EEPROM memory in which the
sensor characteristics are stored (gas type, range, span value, instantaneous, STEL
and TWA alarm values, date of manufacture, serial number, date of last calibration,
span reserve, etc.). The span reserve is updated after each calibration and allows the
user to gage the optimal time for changing the sensor. Sensors must be positioned as
indicated in the table above.
Figure 8: sensors configuration
Ref.
Description
1.
Combustible gas sensor (0 to 100% LEL)
2.
Mini sensors for toxic gases or the 1 year O
2
sensor
3.
Mini sensors for toxic gases or the 1 year O
2
sensor
4.
Medium sensors for:
■ O
2
(>2 year lifetime)
■ CO/H
2
S (combo medium sensor) and other toxic gases
■ CO
2
IR
5.
Medium sensors for:
■ O
2
sensor (>2 year lifetime)
■ Toxic gases (medium sensors except CO/H
2
S sensor)
■ CO
2
IR
■ Infrared sensor for combustible gases
■ PID sensor for VOCs (Volatile Organic Compounds)

Oldham BM25 Specifications

General

Brand	Oldham
Model	BM25
Category	Measuring Instruments
Language	English