Dräger Polytron 7500 User manual

9023927 - 2nd edition - May 2007
Page 1 of 72 Pages
D
Dräger Polytron 7500
Instructions for Use
ST-3804-2005_sw.eps

Contents
Page 2 of 72 Pages
9023927 - 2nd edition - May 2007
Contents
For Your Safety
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Intended Use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing Dräger Polytron 7500
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Preparing for installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Installing the Pyrolyzer docking station
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Electrical connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Installing the Dräger Polytron 7500
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Installing accessories
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Relay module Polytron 7500
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Dräger Polytron 7500 software dongles
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Start-up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Analogue signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Display
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Displays of control LEDs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Activating info mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Maintenance intervals
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Calibrating the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setting up the unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Replacing the sensor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Replacing the pump
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Replacing the pyrolysis oven
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Replacing the internal dust filter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fault – Cause – Remedy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Menu functions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Menu structure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Basic operating procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Switching to quick-menu mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Switching to menu mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Entering the password
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Navigation in the menu
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
The menu » Information «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Sub-menu » Instrument «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Sub-menu » Sensor «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Sub-menu » Datalogger «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9023927 - 2nd edition - May 2007
Page 3 of 72 Pages
Contents
The menu » Calibration «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Sub-menu » Zero. calibration « . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Sub-menu » Span. cal. «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Autocalibration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
The menu » Settings «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Sub-menu » Instrument «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Sub-menu » Communication « . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Sub-menu » Sensor «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Sub-menu » Datalogger «
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Polytron 7500 Operation via LON
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Technical Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Order List
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Accessories
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Calibration accessories
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Spare parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Drilling templates
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Pyrolyzer Docking Station
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

For Your Safety
Page 4 of 72 Pages
9023927 - 2nd edition - May 2007
For Your Safety
Strictly follow the Instructions for Use
Any use of the Polytron 7500 requires full understanding and strict observation of
these Instructions for Use. The Polytron 7500 is only to be used for the purpose
specified here.
Maintenance
The Polytron 7500 must be inspected and serviced regularly by suitably qualified
persons. Repair and general overhaul of the Polytron 7500 may only be carried out
by trained service personnel.
We recommend that a service contract be obtained with Dräger Safety and that
all repairs also be carried out by them.
Only authentic Dräger spare parts may be used for maintenance.
Observe chapter “Maintenance intervals”.
Do not operate in explosion-hazard areas
The Polytron 7500 is not suitable for use in explosion-hazard areas.
Accessories
Do not use accessory parts other than those listed in the order list
Liability for proper function or damage
The liability for the proper function of the Polytron 7500 is irrevocably transferred to
the owner or operator to the extent that the Polytron 7500 was serviced or repaired
by personnel not employed or authorised by Dräger Safety or when the Polytron
7500 was used in a manner not conforming to its intended use.
Dräger Safety cannot be held responsible for damage caused by non-compliance
with the recommendations given above. The warranty and liability provisions of the
terms of sale and delivery of Dräger Safety are likewise not modified by the recom-
mendations given above.
Dräger Safety AG & Co. KGaA

9023927 - 2nd edition - May 2007
Page 5 of 72 Pages
Intended Use
Intended Use
Dräger Polytron
®
7500
— For stationary, continuous monitoring of gas concentrations in the intake ambient
air, with built-in DrägerSensor
®
.
— The Polytron 7500 is available in four types:
— The measuring range may be selected, but it is dependent on the sensor installed.
— With 4 to 20 mA interface or HART
®
for connection to a suitable control unit.
— Optional: compatible with LON interface for connection to a suitable control unit.
_______________
® Polytron is a registered trademark of Dräger.
DrägerSensor is a registered trademark of Dräger.
HART is a registered trademark of HCF, Austin, Texas, USA
Type Order No.
Polytron 7500 DrägerSensor
Dräger Polytron 7500 NF
3
0 to 50 ppm NF
3
(CAS 7783-54-2)
83 18 827 68 11 125
Dräger Polytron 7500 PFC
0 to 30 ppm C
5
F
8
(CAS 559-40-0)
0 to 30 ppm C
4
F
6
(CAS 685-63-2)
83 18 828 68 11 120
Dräger Polytron 7500 NF
3
LON
0 to 50 ppm NF
3
(CAS 7783-54-2)
83 18 829 68 11 125
Dräger Polytron 7500 PFC LON
0 to 30 ppm C
5
F
8
(CAS 559-40-0)
0 to 30 ppm C
4
F
6
(CAS 685-63-2)
83 18 830 68 11 120
Note:
Polytron 7500 cannot be used with DrägerSensors other than the above
listed. The corresponding DrägerSensor must be used to ensure that the unit
functions correctly.
ATTENTION! Explosion hazard!
Do not operate underground or in explosion-hazard areas!
The Polytron 7500 does not meet the standards for flameproofing and explo-
sion protection.
Not to be used for intake from explosion-hazard areas!
The concentration of flammable substances in the intake air must be limited
to values below the LEL
(Lower Explosive Limit)!
The gas mixture may otherwise be ignited because of the high pyrolysis tem-
perature in the Polytron 7500.
Only suitable for use in buildings!
00123927_1.eps

Intended Use
Page 6 of 72 Pages
9023927 - 2nd edition - May 2007
If used together with a control unit (such as Regard) or equipped with a relay
module:
— Warning before any hazardous gas concentrations are reached.
— Automatic implementation of counter measures (for example, additional ventila-
tion).
— Indication of unit faults; display of maintenance measures required.
— Special calibration mode (blocking of alarm triggering, display of calibration
mode, one-man calibration).
Optional extras:
Polytron 7500 relay module
This module permits the local switching of actuators, alarm generators, etc. on the
basis of the measured gas concentration.
Dräger Polytron 7500 software dongles
For activation of additional functions of the Dräger Polytron 7500.

9023927 - 2nd edition - May 2007
Page 7 of 72 Pages
Installing Dräger Polytron 7500
Installing Dräger Polytron 7500
Preparing for installation
The performance and effectiveness of the entire system depends essentially on the
position chosen for installing the transmitter.
The following should be noted during installation:
— Local requirements and regulations governing the installation of gas measuring
systems.
— Relevant regulations concerning the connection and routing of electric power
supply and signal lines.
— The full scope of environmental factors to which the Polytron 7500 may be ex-
posed (ambient conditions: see Technical Data, page 63).
— The specific uses (e.g. possible leaks).
— All other factors and conditions which could have a negative effect on the instal-
lation and operation of the system.
— Physical properties of the gas to be measured:
For gases with a density lower than that of air, the gas intake must be located
above any possible leak or at the highest point at which large concentrations of
gas may occur.
For gases and vapours with a density greater than that of air, the gas intake must
be located below a possible leak or at the lowest point at which such gases and
vapours may occur.
The humidity of the gas to be measured must be between 20 and 90 % relative
humidity.
— Accessibility for the necessary maintenance work . see “Installing the Pyrolyzer
docking station” on page 8.
Dräger Polytron 7500 consists of two main components:
— Pyrolyzer docking station.
— Dräger Polytron 7500.

Installing Dräger Polytron 7500
Page 8 of 72 Pages
9023927 - 2nd edition - May 2007
Installing the Pyrolyzer docking station
— Install in an area with low vibrations and stable temperatures.
— Do not install in an area where there are draughts of very warm air (>40
o
C).
1 During installation, the slots for fitting the Polytron 7500 must point upwards on
the upper edge.
●
A space of at least 5 cm – preferably 10 cm – must be maintained above and to
all sides for the installation of the Polytron 7500.
●
A space of at least 10 cm – preferably 30 cm – must be maintained below the
docking station to permit access for maintenance.
2 Push lock for connecting terminal block upwards, pull out 4-pin connecting termi-
nal block from the front and insert it again after completion of the installation work.
●
Install the docking station using four screws e.g. M6 to a firm wall (drilling tem-
plate: see page 69)
Electrical connections
Connect the docking station to the central unit with a cable with at least three wires
conductor cross-section, 0.5 to 2.5 mm
2
.
Line lengths: see “Maximum line lengths” on page 9.
— For currents of 3 and 22 mA, a DC voltage between 16.5 V DC (3 mA), or 8.0 V
DC (22 mA) must be present at the unit (between the terminals +24 V and 4...20).
3-wire connection
– Installing the 4 to 20 mA current loop
● Install the 3-wire connection cable in the cable gland, cut to length and strip ends
(about 80 mm).
● Shorten the shield (if installed) to prevent short-circuiting.
● Connecting the cable:
secure in terminals of 4-pin connecting terminal block – ensure correct polarity .
3 Slide connecting terminal block back into holder until the lock clicks into place.
Attention:
If the wall is not flat, use suitable spacers (such as mounting bracket 68
09 772) to prevent warping of the case
Caution:
Do not connect the unit to the mains before the electrical installation is com-
plete and has been checked.
00223927_1.eps
11
2
30 cm
10 cm 10 cm
10 cm
00323927_1.eps
+24V
0V
4...20
3

9023927 - 2nd edition - May 2007
Page 9 of 72 Pages
Installing Dräger Polytron 7500
– Connecting to the central unit with a central power supply
●Connect shield to GND of central unit (e.g. housing, earth bar, etc.).
Maximum line lengths
Installing a remote central unit with power supply by 3-wire connection the voltage
drop due to the line resistance [Rline] has to be taken in consideration.
In order to detect a Pyrolyzer failure in the central unit [IF] and the current drawn by
the Pyrolyzer in a fault situation (250 mA) combined with the cable cross-section [A]
and the shunt resistor [Rshunt] will result in a maximum cable length [Lmax].
Rline = (Rshunt x IF) / 250 mA
Lmax = Rline x A / (0.0175 Ohm x mm2/ m)
Example:
The following is valid with a permitted error current [IF] of 3.15 mA:
In a given situation the cable length [Lmax] can be increased by a series connection
of a resistor [RM] into the cable for the 4 to 20 mA signal.
Rschunt new = Rshunt old + RM
Following limitations have to be fulfilled:
Rline + Rshunt = between 30 Ohm and 500 Ohm,
For currents of 3 and 22 mA, a DC voltage between 16.5 V DC (3 mA), or 8.0 V DC
(22 mA) must be present at the unit (between the terminals +24 V and 4...20), see
page 8.
@ Rshunt = 50 Ohm @ Rshunt = 100 Ohm @ Rshunt = 250 Ohm
A Lmax A Lmax A Lmax
0.50 mm2≥18.23 m 0.50 mm2≥36.46 m 0.50 mm2≥91.15 m
0.75 mm2≥27.34 m 0.75 mm2≥54.69 m 0.75 mm2≥136.70 m
1.50 mm2≥54.69 m 1.50 mm2≥109.38 m 1.50 mm2≥273.45 m
2.50 mm2≥91.15 m 2.50 mm2≥182.30 m 2.50 mm2≥455.75 m
00423927_1_en.eps
Central unit
4 ... 20 mA
0 V
+
–
+
Rshunt
RM

Installing Dräger Polytron 7500
Page 10 of 72 Pages 9023927 - 2nd edition - May 2007
– Connecting to the central unit with individual power supplies:
1) IMPORTANT: star-shaped ground system (no ground loops).
RXcorresponds to line resistance Rline from page 9.
– Connecting to a HART Multidrop-capable central
To ensure that the unit operates as intended, the impedance of the 4 to 20 mA signal
loop must not exceed 500 Ohm and must be between 230 and 500 Ohm for HART-
compatible "smart" loops. The conductors of the power supply must have a suffi-
ciently low resistance to ensure that the supply voltage of the unit is correct.
●Each unit must first be put into service separately.
Use the menu item "Polling Address" to assign a different polling address in the
range "1" to "15" to each Polytron 7500, which is to be connected to the multidrop
cable. It is best to assign sequential polling addresses, starting with "1".
●Depending on the supply unit, up to 8 Polytron 7500s can be connected to a line.
Multidrop installation with HART communication and individual power supplies:
Rshunt = 230 ... 500 Ω
Multidrop installation with HART communication and a (central) power supply:
Rcable (pro wire) < U – 15 V Ω/ n x 0.8 [Ω]
n = actual number of units in feed unit
U = output voltage in V of the feed unit with an output current of
n x 0.4 A
Rshunt = 230 ... 500 Ω
+
–
+
–Rshunt
Pyrolyzer 1
Central unit
Pyrolyzer 2
+
–
Rshunt
RX
04623927_1_en.eps
RX
0 V
4...20
+24 V
0 V
4...20
+24 V
1) 1)

9023927 - 2nd edition - May 2007 Page 11 of 72 Pages
Installing Dräger Polytron 7500
4-wire connection
– Installing the LON communication
●Install the 4-wire connection cable in the cable gland, cut to length and strip ends
(about 80 mm).
●Shorten the shield (if installed) to prevent short-circuiting.
●Connecting the cable:
secure in terminals of 4-pin connecting terminal block – ensure correct polarity.
1Slide the connecting terminal block back into holder until the lock clicks into
place.
00523927_1.eps
+24V
0V
LON B
LON A
1

Installing Dräger Polytron 7500
Page 12 of 72 Pages 9023927 - 2nd edition - May 2007
Installing the Dräger Polytron 7500
●Unpack the Dräger Polytron 7500.
●Remove the cover of the Polytron 7500. To do this
1gently pull apart the cover on both sides and
2lift upwards.
●Fit the Polytron 7500 using the metal hooks into the slots provided on the docking
station.
●Slide cover back over the installed Polytron 7500 until it snaps into place at the
sides.
●Connecting the hoses:
Insert the hose into the quick release fastener below the unit.
4Gas input from the inlet point right connection (marked with O-ring).
5Gas output to the offtake left connection.
●Check the hoses to make sure they are inserted properly
Attention! The electrical connection via the edge connector must be clean,
i.e. the safety hooks (3) underneath must snap into the docking station.
Attention! No cables or internal hoses must be pinched.
00623927_1.eps
11
2
00723927_1.eps
3
00823927_1.eps
54

9023927 - 2nd edition - May 2007 Page 13 of 72 Pages
Installing accessories
Installing accessories
Various accessories are available for the Dräger Polytron 7500 and may also be
installed later.
Relay module Polytron 7500
Intended Use
— For switching of actuators, alarm generators, etc. on the basis of the measured
gas concentration.
Connecting the devices to be switched
●Open the relay housing using the cross screwdriver (4 screws on the rear side).
●Install the connection cable in the cable gland, cut to length and strip ends
(approx. 80 mm).
●Shorten the shield (if installed) to prevent short-circuiting.
●Connecting the cable:
3 potential-free relay outputs with 250 V / 5 A (AC) switching capability are
available:
1Fault relay (switches in the case of a device fault)
2A2 relay (switches when the A2 gas alarm is active)
3A1 relay (switches when the A1 gas alarm is active)
●Connect the devices to be switched to the terminals.
Connection assignment of relay module:
●Close the relay housing again.
— Setting the alarm thresholds: see “Alarm / Relay settings” on page 45.
00923927_1.eps
1
2
3
01023927_1_en.eps
red
black
yellow
(normally closed)
(common)
(normally open)
11
2 2
33

Installing accessories
Page 14 of 72 Pages 9023927 - 2nd edition - May 2007
Inserting the relay module into the docking station
●Remove the cover of the Polytron 7500. To do this
4gently pull apart the cover on both sides and
5lift upwards.
6Insert connector with clip of the relay cable into opening on the back-plate of the
Polytron 7500.
7Connect the other end onto the terminal in the measuring unit.
8Fix cable with cable tie to the bracket
9Push relay housing from below into the docking station until it snaps into place.
●Insert the Polytron 7500 back into the docking station.
Carry out function test
— Polytron 7500 operates in the measurement mode (normal operation).
10 The LED on the side of the relay module lights green.
●Hold the hose briefly until a flow fault is displayed (red LED on the front side of
the Dräger Polytron 7500).
10 The LED on the side of the relay module lights red.
04723927_1.eps
44
5
04823927_1.eps
6
7
8
01123927_1.eps
10
9

9023927 - 2nd edition - May 2007 Page 15 of 72 Pages
Installing accessories
Dräger Polytron 7500 software dongles
Intended Use
Dräger Polytron 7500 software dongle – 83 17 618, 83 17 619 or 8317860:
— For activating additional functions in the Dräger Polytron 7500:
Installing the software dongles
●Remove the cover from the Polytron 7500.
●Loosen lock below the Polytron 7500 and remove the unit from the docking sta-
tion.
— The Polytron 7500 must be disconnected from the mains!
1The Dräger logo on the dongle should be facing to the front. Then insert the don-
gle into any of the three slots.
Up to three dongles may be installed simultaneously.
●Insert the Polytron 7500 back into the docking station
●Place the cover back on.
Data Dongle
83 17 618
Colour code blue
— Activates the Event Logger, the Datalogger
and the graphical concentration display.
Sensor Dongle
83 17 619
Colour code silver
— Activates the sensor self-test.
Sensor Diagnostic Dongle
83 17 860
Colour code green
— Activates the sensor self-test, the display of
the remaining sensor lifetime and the sensor di-
agnostic function.
Note:
The correct operation of the software dongle can be checked by switching
the measuring unit on and selecting the menu items » Information «,
» Instrument «, » Module « from the unit menu, see page 36.
01223927_1.eps
111

Start-up
Page 16 of 72 Pages 9023927 - 2nd edition - May 2007
Start-up
●Switch on power supply.
— The balls in the flow tube should be floating at half way.
— The Polytron 7500 begins its warm-up routine:
— Depending on the type of sensor installed, the warming-up period time may last
up to 30 minutes. See the related information in the operating instructions for the
DrägerSensor. At extremely high or low temperatures, the warming-up time may
last longer.
When the sensor has warmed up:
●Calibrate sensor, page 22, when a pre-calibrated sensor is not used.
— The Polytron 7500 is ready for use.
●Check the transmission of the signals between to the control unit and the initiation
of alarms, see the function group » Analogue interface « on page 54.
— The software version, the date and the time are displayed.
Note:
For the correct operation and functionality it is important to set the date and
time.
— The sensor is now warming up. The remaining warming-up time for the
sensor is displayed.
— The sensor is ready for use.
Pioneering Solutions
Polytron 7000
01423927_1_en.eps
01523927_1_de.eps
SWversion: 2.4
29.05.05 11:47
01623927_1_en.eps
NF3ppm
in 00
: 01 : 30
Sensor ready
01723927_1_en.eps
NF3ppm
0.0

9023927 - 2nd edition - May 2007 Page 17 of 72 Pages
Start-up
Analogue signal
— A current between 4 and 20 mA flows through the current loop during normal op-
eration. This current is proportional to the gas concentration.
— The Polytron 7500 uses various current values to indicate the operating status:
Display
An alarm is triggered:
Current Meaning
4 mA Zero point
20 mA Full-scale value
<3.2 mA Fault
3.8 mA ... 4 mA Sensor drift below zero point
20 mA ... 20.5 mA Measuring range exceeded
>21 mA Fault in analogue output
3.4 mA Maintenance signal
<3.2 mA1) for 1 second1)
every 10 seconds1)
1) Factory setting; can be configured as desired, page 52.
Warning signal
(factory setting: off)
— In measuring mode, the display shows the actual gas concentration, e.g.:
— when the alarm threshold for the concentration alarm is exceeded,
— if the measured concentration exceeds the full-scale value:
the special symbol » YYYY« is then displayed instead of the measured value.
— If the measured concentration drops below the calibrated zero point:
the special symbol » XXXX« is then displayed instead of the measured value.
01823927_1_en.eps
NF3ppm
0.9
01923927_1_en.eps
NF3A1
5.0
02023927_1_en.eps
NF3ppm
YYYY
02123927_1_en.eps
NF3ppm
XXXX

Start-up
Page 18 of 72 Pages 9023927 - 2nd edition - May 2007
Displays of control LEDs
1LED » « – pyrolysis oven
lights green when there is no error
lights red when the pyrolysis oven is defect. Replace the pyrolysis oven, page 26.
2LED » « – pump measurement branch
lights green when there is no error
lights red when the flow rate in the measurement branch is not sufficient. Replace
the pump, page 25 .
flashes red when an internal flow test is carried out.
3LED » « – pump – principal branch
lights green when there is no error
lights red when the flow rate in the principal branch is not sufficient. Replace the
pump, page 25.
The following icons may be displayed on the right side of the display in measur-
ing mode in order to indicate the operating status of the unit:
A warning exists – see page 36 for information on how to display warnings.
The information can be retrieved in info mode, see page 19.
A fault exists – see page 36 for information on how to display faults.
Maintenance signal to the control unit, see page 55
The flow monitoring is activated
There is a Pyrolyzer fault, see page 44
The measured value exceeds the full-scale value of the analogue interface
The measured value is less than the zero point of the analogue interface
The analogue interface is set to a fixed value (e.g. for multidrop) and is not trans-
mitting measured values
"Predictive" maintenance: the sensor is ready for use
"Predictive" maintenance: The sensor is ready for use but nearing the end of its
operating lifetime
"Predictive" maintenance: The sensor is still ready for use but should be replaced
as soon as possible
The Datalogger is active in roll mode. For details of activating and deactivating
the Datalogger, see page 59
The Datalogger is active in stack mode. For details of activating and deactivating
the Datalogger, see page 61
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9023927 - 2nd edition - May 2007 Page 19 of 72 Pages
Start-up
Activating info mode
The info mode is used to display information about general unit settings and the
unit status.
●Press and hold the » « key (longer than 3 seconds) – information about the
units is displayed on several screens.
— Briefly press the » « key to move to the next screen.
— Briefly press the » « to move back to the previous screen.
— The info mode can be terminated at any time by pressing the » « key.
— If no key is pressed for 30 seconds, the unit automatically returns to its
previous state.
Example of info mode:
Screen 1
Instrument information
Line 1 – Date and time
Line 2 – Software version
Line 3 – Unit Part No.
Line 4 – Unit Serial No.
Line 5 – Unit code
Screen2
Sensor information:
Line 1 – Sensor name
Line 2 – Sensor Part No.
Line 3 – Sensor Serial No.
Line 4 – EEPROM type
Line 5 – EEPROM version
Screen. 3
Sensor configuration:
Line 1 – Gas name
Line 2– Measuring range (cannot be change) and unit of measurement
Line 3 – Measuring range for the analogue interface.
displayed only if the analogue interface card is installed
Line 4 – A1 alarm threshold and unit of measurement1)
Line 5 – A2 alarm threshold and unit of measurement1)
1) Displayed only if a relay module is fitted!
Screen 4
Pump Infos:
Line 1 – Pump flow
Line 2 – Threshold error
Line 3 – Threshold warning
Line 4 – Pump run time
02323927_1.eps
M
OK
02423927_1_en.eps
07.05.2005 12:34
SW Version: 1
Part No. : 8318827
Serial No. : ARUA0001
DeviceCode : 00006317
Instrument Info
1/4
02523927_1_en.eps
2/4
Sensorname: NF3
Part No. : 6811125
Serial No. : XXXXXXX
EEPROM Typ : 1
EEPROM Vers.: 1
Sensor Info
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3/4
Gasname : NF3
Range : 30.0 ppm
4–20 SP : 30.0 ppm
Alarm A1 : 5.0 ppm
Alarm A2 : 10.0 ppm
Sensor Config
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4/4
Power : XXX %
Fault : X.X l/min
Warning : X.X l/min
Op. time : XXXX h
Pump Info

Start-up
Page 20 of 72 Pages 9023927 - 2nd edition - May 2007
If "xx.xx.xx xx:xx" is displayed instead of the date and time, or if an incorrect
date and time are displayed:
(only after the clock has been reset due to a power failure)
●Set the date and time, see page 48.
Note:
If the date and time are not set correctly, some functions (such as calibra-
tion) cannot be executed.