24 Dräger Polytron 8700/8720
Settings menu
8.4 Sensor settings
8.4.1 Switching Auto CAL on or off
1. Select Settings > Sensor > Set auto calibration and
confirm.
2. Select On or Off and confirm.
8.4.2 Sensor testsettings
The setting functions for the sensor self test are summarized
in this group of functions.
8.4.3 Switching the sensor test on or off (for EC
sensors only)
When the sensor self test is enabled, the device continuously
checks the sensor to insure reliable functioning. If the sensor
does not pass the self test, an appropriate warning or fault
indication is issued.
1. Select Settings > Sensor > Sensor test and confirm.
2. Select On or Off and confirm.
8.4.4 Switching the sensor lock on or off (for EC sensors
and PIR 7000/7200 only)
This function is used to activate or deactivate the sensor
interlock.
1. Select Settings > Sensor > Sensor lock and confirm.
2. Select On or Off and confirm.
8.4.5 Setting the sensor type (for DD sensors only)
This function is used to set the sensor type.
1. Select Settings > Sensor > Sensor type and confirm.
2. Select sensor type PIR 7000 (for all PIR 7000/7200
variants) or PIR 3000 and confirm.
8.4.6 Changing the gas settings
Settings for gas type, measuring range and measurement
units can be made in this menu.
1. Select Settings > Sensor > Gas setting and confirm.
2. Select the measured gas from the list and confirm.
The measurement units display will be shown.
3. Select the measurement units and confirm.
The full scale reading display will be shown.
4. Set the full scale reading and confirm.
The setting for the full scale reading is displayed.
5. Select Next and confirm.
an overview of the new gas settings is displayed.
z Return to the previous view with Previous or confirm the
settings with Confirm.
Information about the measured gas
If the PIR 7000/7200 sensor is used, the measured gas can be
selected from many different gases. These substances are
already stored in the PIR 7000/7200 as library substances.
Selecting a library function has the following effects:
z The name of the library substance is shown in the display.
z The selected substance is automatically selected as the
calibration gas.
z The output signal of the PIR 7000/7200 is linearized and
temperature compensated for this substance.
z All other necessary parameters for this substance such as,
e.g., detection limit or measuring ranges are updated and
adopted for the Polytron 8000.
z List of measured gases: see chapter 12 on page 30.
Information about measurement units
The Polytron 8000 represents the measured value in various
optional units. The following are available:
The Polytron 8000 automatically calculates the correct value.
Information about the category
If the units %UEG, %LEL or %LIE are selected, the device
offers various fixed categories based on the standards of
NIOSH, IEC or PTB.
With Custom specific it is possible to enter an individual
conversion of a volume concentration [vol.%] into % of the
Lower Explosive Limit [%LEL] The maximum selectable limits
are approx +-25 % of the NIOSH category applicable to the
particular gas.
NOTICE
The auto-calibration from the Calibration menu is only
available if this function is enabled.
NOTICE
The sensor test settings are only available for certain
sensors.
Standard
setting
=Off
On = The device will only accept a new sensor if
the Part Number (= Dräger Order Number),
and hence the sensor type, is identical to
that of the previous sensor.
Off = The device will also accept other sensor
types and with thus adopt the default
settings for the sensor, i.e., in this case the
configuration of the device will be altered.
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z ppb z L/m3
z ppm z mL/L
z vol.% z mL/m3
z %LEL z uL/L
z %LIE z uL/m3
z %UEG
NOTICE
This selection is only displayed if %LEL, %UEG or
%LIE was selected for the units.
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