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The menu » Settings «
Sub-menu » Sensor «
The sub-menu » Sensor « can be used to make various settings for the installed sen-
sor.
Change sensor
— This function can be used to change a sensor while the unit is running without
sending a fault alarm to the control unit. It also ensures that all sensor data cur-
rently in the microprocessor can be saved to the EEPROM of the sensor before
the sensor plug is disconnected.
— In principle, a sensor can be replaced at any time. However, for technical safety
reasons, a fault alarm will be activated until a new sensor is connected, in case
a sensor is disconnected accidentally.
Select the menu items » Settings «, » Sensor « and » Change sensor « in this or-
der, pressing the »
« key after each selection.
OK
— The maintenance signal is transmitted on the interface and the message
» Please remove sensor « is displayed.
Remove the old sensor and plug in the new one (see page 23).
When the new sensor has been installed:
The message » Loading database, please wait « is displayed.
When the sensor data have been loaded:
— The message » Database is loaded « is displayed.
Select » Back to menu « and press the »
The maintenance signal on the interface remains active until the sensor has
warmed up.
The duration of the warming-up period depends on the type of sensor and its history.
If, for example, the sensor had already been warmed up on another unit and it was
disconnected only for a short time, the warming-up period may be shorter than that
shown in the Instructions for Use for the sensor.
See the operating instructions for the sensor for the maximum warming-up period.
see the Instructions for Use for the sensor.
If the old sensor is replaced with an identical sensor (with the same Part No.), the
configuration of the Polytron 7500 (gas type, measuring range, calibration gas, cali-
bration interval) remains unchanged.
Otherwise, the default values for the sensor (see Instructions for Use for the Dräger-
Sensor) are used by the Polytron 7500 if the sensor-lock function (page 57) is disa-
bled.
Autocalibration setting
— This function is used to enable and disable the autocalibration (page 41).
Select the menu items » Settings«, » Sensor « and » Set autocal. « in this order,
pressing the »
« key after each selection.
OK
Select » Enable « or » Disable « and press the »
— Autocalibration from the menu "Calibration" can be used only if this function is en-
abled.
Page 56 of 72 Pages
« key.
OK
« key to activate it.
OK
9023927 - 2nd edition - May 2007
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