Oldham BM25, Руководство по эксплуатации

Страница: 26 / 43

27
1.2. Sensor calibration menu
This menu is used to regularly calibrate the sensors connected to the instrument.
Calibration consists of adjusting the zero of the clean air sensor (free of gas which may be detected
by the BM25) and adjusting sensitivity with a standard gas of known characteristics. Flow rate of
the standard gas rate must be 601/h.
-
access “calibration” menu and follow instructions.
1.3. Auto-zero menu
This menu lets you adjust the "zero" of each sensor used in the BM25 automatically and
simultaneously.
Caution: this menu must be used in clean air only!
1.4. Date and time management menu
This menu is used to update the internal calendar and clock of the gas detector.
These data are used to define time scales, especially when the measurements stored in memory
(min., max., STEL and TWA) are printed out or downloaded to an external microcomputer.
Loss of date and time
The electronic circuits for the date and time are supplied with power by a specific lithium battery
when the main battery is flat or when the device is switched off.
This lithium battery has an estimated service life of 2 years.
When this battery is low, operator is notified with a message “low battery” before losing all stored
data. Battery must then be replaced.
CAUTION: This operation is to be performed by INDUSTRIAL SCIENTIFIC- or
INDUSTRIAL SCIENTIFIC- approved personnel only.
1.5. Exit menu
To return to normal user mode.
V
V
.
.
C
C
O
O
M
M
2
2
1
1
0
0
0
0
S
S
O
O
F
F
T
T
W
W
A
A
R
R
E
E
COM2100 software ensures the gas detector's supervision and maintenance:
- display in uncoded mode of readings and parameters on channels
- gives diagnostic assistance in case of failure
- helps programming of instrument and sensor channels
- allows management of options
- enables calibration of channels through an automated scrolling menu
- prints status and control reports
- enables the management, display and printout of events and measurements stored
- is password protected
The link between the BM25 and the PC is made by a “COM” or “USB” infrared port adaptor cable.