Measuring Mode; User Interface Keys; Ending Special States - Dräger Polytron 8900 UGLD Instrucciones De Uso

A commissioning service ensures that customer required leak
rate at each potential leak location will be detected by the
corresponding instrument. The instrument shall not be
operated permanently with a signal above 85 %. However,
leak detection above 85 % is ensured.
A commissioning device simulates a real gas leak in a short
burst and is proof for proper installation. A calibration of the
instrument is not necessary.
6 Operation
6.1 Display

6.1.1 Measuring mode

Display example Description
In normal operation, the percentage of
20.0
measurement range of the instrument
is displayed
UGLD %
1) The value changes according to the background noise emitted by
machinery or personnel. Thus a changing value does not immediately
indicate a leak. To prevent misinterpretation from personnel, the dis-
play can be switched off.
6.1.2 Special states
If the instrument is in a special state, a proper measurement
can no longer be guaranteed.
This is the case:
– When the ultrasonic signal exceeds the measuring range.
– When a fault occurs.
– During calibrations.
– During bump tests.
– During maintenance.
Display example Description
Exceeding measuring range
UGLD %
Fault indication
The current output of the analog inter-
face is set to fault current and the fault
relay is asserted (if relay option is
installed).
For calibration, bump test and mainte-
20
nance the
the right side of the display. On the left
side corresponding information is
UGLD %
given.

6.1.3 Ending special states

Fault / warning indication
Faults and warnings are non-latching. If the fault or warning
condition clears, the message disappears.
Instructions for use |
Dräger Polytron
1)
.
symbol is displayed on
®
8900 UGLD
To solve warning and fault conditions, display the error code
or warning message (see "Displaying Information", page 14)
and begin troubleshooting (see "Troubleshooting", page 16).
6.2 LED and symbol indications
Symbol LED
Red
Yellow
Green
6.3 Definitions of indicators in the
display
Symbol Explanation
Error message available.
Warning message available.
Maintenance signal is transmitted.
Measuring range of analog interface
exceeded.
Measurement value less than range of
analog interface.
®
HART operation is active. Analog inter-
face is set to a fixed value and is not trans-
mitting any measurement signal.
The data logger is active in Roll mode.
The data logger is active in stack mode.
SIL SIL operation mode is activated.
6.4

User interface keys

The instrument is designed for the magnetic wand (part
number 4544101: blue body, white logo) to be used with the
enclosure lid in place. If the enclosure lid is not in place, the
magnetic wand may activate two or more buttons at once
(cross-talk).
Button Function
Upwards / Function key
Downwards / Menu key
M
Different functions depending on the type of menu
OK
|
Operation en
Description
Alarm Triggered
Fault
Power on
13