Dräger PEX 1000 Manual De Instrucciones página 27

4.4.4 dP – turning the decimal point on
This function is used to select the decimal point in the display if the
DrägerSensor LC M or the remote transmitter with the sensing head SE Ex LC
... DD is used with a measuring range of 0 to 9.9% LEL. The decimal point is
only displayed for gas concentration displays in % LEL.
1. Navigate using the ▲ or ▼ keys until the display shows dP ("decimal Point")
and confirm by pressing the keys (▲+▼). The decimal point is now
displayed if already selected. The flashing point on the bottom right is
switched off.
2. Use the ▲ or ▼ key to turn the decimal point on or off.
3. Press the keys (▲+▼) to save the current status and exit the function. The
display shows dP. The activated decimal point is not displayed, rather the
point at the bottom right flashes once again.
4. Press the ▲ key four three times to return to measuring mode.
4.4.5 So – Display software version
To document necessary software modifications, this function can be used to
display the software version implemented in the transmitter.
1. Navigate using the ▲ or ▼ key until the display shows So ("Software") and
confirm by pressing the keys (▲+▼).
– The display shows a figure between "0.1" and "9.9", indicating the
current software version of the transmitter.
2. Press the (▲+▼) keys to exit the function. The display shows So once
again.
3. Press the ▲ key five three times to return to measuring mode.
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4.4.6 AZ – Switch on automatic zero-point correction
The transmitter has automatic zero-point correction from software version 2.5
(Autozero). This can partially correct zero-point deviations owing to long-term
drift of the sensor and to environmental influences depending on the time of day
and improve the quality of the measured values.
The correction rate and the absolute limit of the automatic zero-point correction
are based on the tolerances of EN/IEC 60079-29-1.
The automatic zero-point correction is not part of the metrological suitability
test in accordance with EN 60079-29-1 and is deactivated at the factory. Dräger
recommends activating the automatic zero-point correction.
1. Navigate using the ▲ or ▼ keys until the display shows AZ ("AutoZero")
and confirm by pressing the (▲+▼) keys.
– The display shows "on" or "oF" (off) depending on the current setting.
2. Use the ▲ or ▼ key to turn the Autozero on or off.
3. Press the keys (▲+▼) to save the setting and exit the function. The display
shows AZ once again.
4. Press the ▲ key five three times to return to measuring mode.
5 Operation
Although the transmitter was factory-tested before delivery, the
commissioning after installation must include the zero-point and sensitivity
adjustment. The commissioning process must be concluded with a functional
test of the complete gas detection system.
5.1 Installing the transmitter
5.1.1 Mounting
The PEX 1000 is intended to be mounted on a top-hat rail.
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Operation
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