Dräger Polytron 8900 UGLD Instructions For Use Manual page 8

en |
Conventions in this document
– The conductors for the power supply must have an
adequately low resistance to ensure the correct supply
voltage at the instrument.
– Wire insulation must be stripped by 5 to 7mm.
– Secondary circuit intended to be supplied from an isolating
source (N/A for relay circuits).
– When installed at locations exceeding ambient
temperatures of 55 °C, use only appropriate wiring,
specified for at least 25 °C above the maximum ambient
temperature.
Analog interface
– To ensure proper operation of the instrument, the
impedance of the 4 to 20 mA signal loop must not exceed
300 Ohms. With values above 300 Ohms, monitoring of
the supply voltage cannot be guaranteed. Depending on
the operating voltage and according to the application (e.
®
g. HART operation), certain minimum impedances must
be observed (see "Signal transmission to control unit",
page 24).
1.5 Commissioning
– Ensure wiring for relays and connections for sensor are
made before applying power.
– Before leaving the instrument for normal operation, check
the configuration and calibration for the proper settings.
1.6 During operation
– After modifying parameters with the PolySoft PC software
or another software, verify all parameters by downloading
from the instrument or by checking them on the Polytron
8xx0.
– IP ratings do not imply that the equipment detects leaks
during and after exposure to those conditions. In case of
dust deposits and submersion/jet water, check the
calibration and the proper functioning of the device.
Risk of ignition of flammable or explosive atmospheres!
– CAUTION: High off scale readings may indicate an
explosive concentration.
(Only for instruments measuring combustible
atmospheres.)
– WARNING: Do not open when energized
1.6.1 Maintenance
– The maintenance intervals must be established for each
individual installation. Depending on safety considerations
and application specific conditions the instrument is used
in, these might need to be shortened.
– Refer to the maintenance section in the transmitter
instructions for use.
2 Conventions in this document
2.1 Meaning of the warnings
The following warnings are used in this document to alert the
user to potential dangers. A definition of the meaning of each
warning is as follows:
8
Alert icon Signal word
2.2 Typographical conventions
Text
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2.3 Trademarks
Trademark
Polytron
DrägerSensor
®
HART
The following webpage lists the countries in which Dräger's
trademarks are registered: www.draeger.com/trademarks.
3 Description
3.1 Product overview
Refer to the figures on the fold-out page
A 1 Enclosure lid
A 2 Set screw (2 mm Allen screw)
A 3 Handle
A 4 PCB unit
A 5 Enclosure bottom
A 6 Port for sensor
B Sensor replacement
C Calibration set-up
Instructions for use |
Dräger Polytron
Warning classification
WARNING Indicates a potentially hazard-
ous situation. If not avoided, it
could result in death or serious
injury.
CAUTION Indicates a potentially hazard-
ous situation. If not avoided, it
could result in physical injury. It
may also be used to alert
against unsafe practices.
NOTICE Indicates a potentially hazard-
ous situation. If not avoided, it
could result in damage to the
product or environment.
Texts in bold type identifies labels on the device
and screen texts.
This triangle indicates the possibilities for avoiding
the hazard in warnings.
The greater-than sign indicates a navigation path
in a menu.
This symbol indicates information that facilitates
the use of the product.
Trademark owner
Dräger
®
Dräger
®
HART Communication Foundation
®
8900 UGLD Firmware version ≥ 4.0.x