Dräger Polytron 8000 Serie Notice D'utilisation page 33

11.9.3 Testing alarms/relays
These functions change the statuses of a relay and an LED
for test purposes (e.g., to check the function of alarm devices
connected to the relay). The
exiting this function, the statuses of the relay and the LED will
automatically return to their previous statuses.
1. Select and confirm the desired alarm condition via
Settings > Instrument > Alarm.
Set Alarm A1 Simulates a pre-alarm
Set alarm A2 Simulates a main alarm
Set fault Simulates a fault signal
2. Select and confirm Enable.
 The fault relay is de-energized and the 4 to 20 mA
interface is set to fault current. The yellow LED is lit,
the symbol for maintenance is shown.
When the menu is exited, the simulation is ended.
11.10 Data logger settings
11.10.1 Displaying graph
The last 15 minutes as a time/concentration graph can be
viewed.
1. Select Information > Data logger > Graph
11.10.2 Switching data logger on or off
1. Select Settings > Data logger > Datalogr. on/off and
confirm.
2. Select Enable or Disable and confirm.
11.10.3 Setting the sampling time
This function defines how often a value is stored.
1. Select Settings > Data logger > Datalogr. on/off >
Sample time and confirm.
2. Select the sample time and confirm.
11.10.4 Setting peak/average
This function determines which value is stored.
1. Select Settings > Data logger > Data logger >
Peak/Average and confirm.
2. Select Peak or Average and confirm.
Peak
Average
Instructions for use |
Dräger Polytron
symbol is displayed. After
The maximum value (if moni-
toring falling concentrations,
the minimum value) of the
measured concentrations
within the selected sampling
time is stored.
The average value of all the
measured concentrations
within the selected sampling
time is stored
®
8000 Series SW version ≥ 4.0.x
11.10.5 Switching triggering mode on or off
This function allows storing values from a certain value on.
1. Select Settings > Data logger > Data logger > Trigger
on/off and confirm.
2. Select On or Off and confirm.
On
Off
11.10.6 Setting trigger value
This function defines the trigger threshold to store a value.The
trigger value is defined as a percentage of the full scale
deflection.
Example: A trigger value of 2 % at full scale deflection of 500
ppm will only store values if they deviate by 10 ppm (relative
to the previously stored value).
1. Select Settings > Data logger > Datalogr. on/off Trigger
value and confirm.
2. Set the trigger value and confirm.
11.10.7 Setting stack/roll function
1. Select Settings > Data logger > Data logger >
Stack/Roll and confirm.
2. Select Stack or Roll and confirm.
Roll
Stack
11.10.8 Clearing data logger
This function deletes the stored data.
1. Select Settings > Data logger >Clear data logger and
confirm.
2. To clear the data-logger, select Confirm and confirm with
[OK].
12 Interface settings
12.1 4-20mA interface
The current output of the instrument during normal operation
is between 4 and 20 mA and is proportional to the detected
gas concentration.
Polytron 8xx0 uses different current values to indicate various
modes of operation. The factory default settings are user
adjustable for application specific requirements. This follows
the NAMUR recommendation NE43.
Interface settings |
Measurements are stored if
they exceed a threshold
beyond the trigger value (rel-
ative to the last stored value).
Measurements within the
sampling time are stored.
Once the capacity of the data
logger is reached, the old
data are overwritten by new
values.
Once the capacity of the data
logger is reached, no more
data can be stored. The
instrument issues a warning.
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