8
Dräger Polytron 5100
Description
2.2
Intended use
The Dräger Polytron 5100 is an explosion proof instrument for
the continuous monitoring of toxic gases and Oxygen in
ambient air. The instrument is housed in a rugged stainless
steel or aluminum enclosure for indoor and outdoor
applications. The instrument can be connected through a
sealed conduit or approved cable gland to a Dräger monitoring
system or a Programmable Logic Controller (PLC). With the
optional alarm relay configuration, the instrument can be
operated as a stand-alone unit. The instrument is designed to
be installed in permanent locations and is approved for use in
hazardous, classified areas, see Section
9.1 on Page
27.
With
the optionally integrated relay module, the instrument can be
operated without a central controller (with additional local
alarm signaling).
To reduce the risk of ignition of a flammable or explosive
atmosphere, strictly adhere to the following Caution and
Warning statements:
!
WARNING
Substitution of components may impair Intrinsic
Safety.
!!
CAUTION
Not tested in oxygen enriched atmospheres
(>21%
O
2
). High off-scale readings may indicate an
explosive concentration.
!
WARNING
Danger of explosions. Not to be used in Oxygen
enriched atmospheres. None of the Polytron 5100
instruments are certified and approved to be operated
in Oxygen enriched atmospheres.
2.3
Intended operating area and conditions
Hazardous areas classified by zones:
The device is intended to be used only in hazardous areas
classified Zone 1 or Zone 2, within a temperature range as
marked on the device, where gases of explosion Groups IIA,
IIB or IIC and temperature class T4 or T6 (depending on the
maximum ambient temperature) or dusts of Groups IIIA, IIIB or
IIIC may be present.
Hazardous areas classified by divisions:
The device is intended to be used only in hazardous areas
Class I or II, Div. 1 or Div. 2, within a temperature range as
marked on the device, where gases or dusts of Groups A, B,
C, D or E, F, G and temperature class T4 or T6 (depending on
the maximum ambient temperature) may be present.
2.4
Design
The instrument is powered by 10 or 18 to 30 VDC (see
Section
9.4 on Page
27). Gas concentrations, status
messages, and menu choices are displayed on a back-lit 4
digit LC-display and 3 colored LEDs. The measured gas
concentration is converted to a 4 to 20 mA analog output signal
per NAMUR recommendation NE43. The instrument can be
operated in a 2-wire or 3-wire configuration. When operated in
a 2-wire configuration, certain features like back-lit display or
relays are not supported.
Navigation through the menu is done by tapping a magnetic
wand on the glass at the appropriate indicator.
The instrument can be configured, calibrated and maintained
non-intrusively without declassifying the area.
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