Technical data
Dräger Polytron 8700/8720 33
13.1 Torques
(The torques are valid for the aluminum and stainless steel
316 variants)
13.2 Tightening torque and cable size for field
wiring terminals
If an optional e-Box is being used, fasten the device securely
to the e-Box with 4 screws and a tightening torque of 8 Nm.
13.3 Factory settings
13.3.1 Unalterable settings
13.3.2 Alterable settings for the Polytron 8700
Part Torque Lb. In. Torque Nm
Housing cover min. 266 min. 30
Sensors min. 266 min. 30
Blanking plugs min. 266 min. 30
Cable entry min. 443 min. 50
Device to e-Box 71 8
Electronic
Torque Lb. In. Cable size in AWG Cable size in mm
2
All field wiring
terminals
4.4–7.0
(0.5–0.8 Nm)
20–12 0.5–2.5
Fault Meaning
Fault relay / wired
in e-Box
energized / NO
Yellow Fault LED Lights when a fault is present
(see chapter 9 on page 27).
Red Alarm LED Gives single flashes when an A1 alarm
is present.
Gives double flashes when an A2 alarm
is present.
If an alarm is configured as
acknowledgeable and the alarm is
acknowledged, the LED lights.
Alarm hierarchy: A2 has a higher priority
for the LED than A1. However the A1 and
A2 relays operate independently of one
another, i.e. if A1 is acknowledgeable and
A2 is not and the gas concentration is so
high that A1 and A2 are triggered, an
acknowledgement results in the A1 relay
dropping out. However the red LED
continues to give double flashes as long
as the A2 condition exists.
Standard setting
Menu Polytron
8700 Type
334
Polytron
8700 Type
340
Polytron
8720
Calibration
gas type
Methane Propane CO
2
Calibration
gas units
vol.% vol.% vol.%
Calibration gas
concentration
2.5 0.75 4.0
A1 Alarm 20 %LEL 20 %LEL 1 vol.%
A2 Alarm 40 %LEL 40 %LEL 2 vol.%
A1 Relay alarm:
Direction
Rising Rising Rising
A2 Relay Alarm:
Direction
Rising Rising Rising
A1 latching mode Non-latching Non-latching Non-latching
A2 latching mode Latching Latching Latching
A1 Acknowledge-
ment mode
Acknowl-
edgeable
Acknowl-
edgeable
Acknowl-
edgeable
A2 Acknowledge-
ment mode
Not acknowl-
edgeable
Not acknowl-
edgeable
Not acknowl-
edgeable
A1 enrg / wired in
e-Box
Energized /
NO
Energized /
NO
Energized /
NO
A2 enrg / wired in
e-Box
Energized /
NO
Energized /
NO
Energized /
NO
LEL type NIOSH NIOSH ----
Measured gas Methane Propane CO
2
Measured
gas units
%UEG %LEL vol.%
FSD Set 100 100 5
Password 0000 0000 0000
PIR Lock Off Off Off
SIL password _ _ _2 _ _ _2 _ _ _2
SIL status Off Off Off
Language English English English
Fault current 1.2 mA 1.2 mA 1.2 mA
Warning current 3.0 mA 3.0 mA 3.0 mA
Maintenance
current
3.4 mA 3.4 mA 3.4 mA
Beam block Off Off Off
HART address 0 0 0
Auto-cal. Off Off Off
Calibration
interval
360 360 360
Response Normal Normal Normal
Function key Faults Faults Faults
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