Oldham MX 2100, Руководство по эксплуатации и техническому обслуживанию

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2.1. Layout of cells on top of appliance: examples of configuration
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2.2. Explosimetric cell
This removable, interchangeable and intelligent cell unit can detect explosive gases in the range 0 to 100% LEL and/or
0 to 100% by volume, as applicable.
It is equipped with a cell body and filaments, and
must be positioned in the MX 2100 as indicated above.
2.3. Toxic gas and oxygen metering cells
These removable, interchangeable and intelligent cell units are fitted with an electrochemical cell and electronic
components, including an EEPROM memory in which OLDHAM has stored the cell's specific characteristics
(measuring range, various correction coefficients, STEL and TWA alarms, date of manufacture, serial number, etc.).
Another item of data called the "wear rate" is used by the MX 2100 to automatically determine the optimal time to
replace the cell.
These types of cell unit are therefore also referred to as "intelligent units". They are positioned as indicated above (see
section 2.1).
2.4. DETECTION OF “VERY HEAVY” EXPLOSIVE GAS
The explosimetric cells of the Oldham portable detectors detect most explosive gases. However, for “heavy” gas and
vapours (with vapour density over three), it is mandatory to use a pump (manual or automatic) and/or to remove the
protective filter located on the explosimetric cells, in order to improve the detection speed.
"ALL GAS" RANGE
This function is particularly adapted to explosive gases with a density lower than three. For heavier gases or vapours, it
is mandatory to choose a specific range and use a pump (manual or automatic) and/or to remove the protective filter
located on the explosimetric cells, in order to improve the detection speed.
3
3
.
.
D
D
I
I
S
S
P
P
L
L
A
A
Y
Y
U
U
N
N
I
I
T
T
This is an LCD type display unit which lights up automatically in backlit mode in case of alarm or fault.
It is also a graphic display unit so as to optimize the readability of measurements.
Its displays measurements:
- 5 measurements with units and types of gas,
- indication of the channel to be calibrated, where applicable.
It also displays parameters:
- date and time,
- minimum – maximum,
- mean STEL and TWA values,
- remaining autonomy (by bar graph),
- roundsman (name).
Explo cell. 0 to 100% LEL
or Explo/Katharo 0 to 100%
LEL /0 to 100% GAS
TOX cells (small models) or
oxygen cell with service life of
1 year (small model).
Oxygen cell with service life of
2 years (large model) or
- CO/H2S
- Semiconductor
- SO2, ETO, etc.
- CO2 IR