Oldham MX 2100, Operating And Maintenance Manual

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7.3.2. Acknowledging fault alarms
It is impossible to acknowledge a fault alarm.
Fault alarms are cleared automatically as soon as the fault has disappeared.
8
8
.
.
M
M
E
E
A
A
S
S
U
U
R
R
E
E
M
M
E
E
N
N
T
T
S
S
8.1. Display of instantaneous measurements
8.1.1. In "natural diffusion" mode
All the instantaneous measurements regarding gases is displayed in continuous mode.
The display unit is divided into four separate fields (quadrants).
The following information can be read:
•
measurement which is displayed continuously,
•
the measuring unit preceding the gas symbol.
8.1.2. With electric pumping systems
•
Before taking a reading, wait for the measurements to stabilize. They will be either overestimated
(explosive gases) or underestimated (oxygen) during pump ing owing to the movement of air.
•
When an electric pump is used, wait a few seconds before reading the measurement. Any fault on the
pumping system will be indicated by an audio alarm and the display unit.
8.1.3. With manual pumping systems
Before taking a reading, wait for the measurements to stabilize. They will be either overestimated (explosive gases) or
underestimated (oxygen) during manual pumping (with bulb) owing to the movement of air and the bleeding of the
system.
8.2. Automatic switching to "0-100% GAS" range
An option provides for automatic switching from the measurement of explosive gases in the "0-100% LEL" range to the
"0-100% GAS" range when the measurement exceeds 100% LEL for the selected reference gas. This measurement can
only be used on an appliance equipped with a "Explo/Katharo" cell.
8.3. Memorizing histogram measurements
Depending on the version, the MX 2100 can memorize measurements so they can be restored later on a computer.
The "Histogrammes" (Histograms) function can be used to output values and events memorized by MX 2100 during its
operating period to a computer (a workstation, for example). Resetting of the data contained in the histogram memory
can only be performed with a computer. Switching off the MX 2100 has no effe ct on memorized data.