Oldham BM25, Руководство по эксплуатации

Страница: 17 / 43

18
NB : For this operation type, the BM25 must be equipped with an oxygen sensor.
The letter K diplay confirms this mode.
8.3. Memorizing histogram measurements
Depending on the version, the BM25 gas detector can memorize measurements so that they can be
restored later on a computer.
The "Histogram’s" function can be used to output values and events memorized by BM25 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 gas detector has no
effect on memorized data.
8.3.1. Operating principle, memorized items:
The BM25 stores sets of data as soon as it is started, and then in cyclic mode. Each of these sets or
threads (with their pre-programmed specifications) has the same structure.
A thread contains:
•
information on measurement channels
•
the mean measurements of concentrations on each sensor in operation, over the period of
storage intervals (configurable)
•
the events on each channel:
- resetting
- fault
- instantaneous or mean alarms
- types of maintenance requested (programming, calibration, sensor replacement)
- date and time
- battery in discharged state
- auto-adjustment request
- maintenance function request.
8.3.2. Memory capacity
The gas detector can store about 200,000 measurement points.
If the quantity of data to be stored exceeds the gas detector’s storage capacity, the oldest data are
lost.
8.3.3. Data storage time
The data stored by the BM25 are stored even if the instrument is not used for a long time (out of
service).
I
I
I
I
I
I
.
.
S
S
p
p
e
e
c
c
i
i
a
a
l
l
i
i
n
n
s
s
t
t
r
r
u
u
c
c
t
t
i
i
o
o
n
n
s
s
f
f
o
o
r
r
u
u
s
s
e
e
i
i
n
n
e
e
x
x
p
p
l
l
o
o
s
s
i
i
v
v
e
e