Pfeuffer GTM 800 User manual

Artikelnummer / Article no. 1336 0821
Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Phone: [phone]
Fax: [phone]
Email: [e-mail] Revision 3/10.07.2017
Internet: http://www.pfeuffer.com Translation of the original operating instructions
Installation and
Operating instructions

Installation and operating instructions GTM 800
Translation
In the event of delivery of subsequent sale to the countries of the European Economic Area (EEA), the operating
instructions must be translated into the corresponding language of the country of use.
In the event of discrepancies in the translated text, the original operating instructions (German) must be used for
clarification, or the manufacturer must be contacted.
Operating instructions in electronic format
The original operating instructions (German) and translations of the original operating instructions can be
requested as PDF files by e-mail: [e-mail]
Specifying the correct type designation and serial number is important for further processing!
Copyright
This document is not allowed to be communicated or duplicated, utilised without express permission, which also
applies to communicating its content. Offenders are liable to the payment of damages. All rights reserved with
regard to patent claims or submission of design or utility patent.
(DIN ISO 16016)
Page 2 of 22 Revision 3 © 2017 –Pfeuffer GmbH
Document history
Date
Revision
Comment
Sign
10.05.2005
1
First issue
LP
14.10.2010
2
Modifications
LP
10.07.2017
3
New layout, Declaration of conformity updated
MF
These Operating Instructions are a constituent part of the machine and must be
available to all operating personnel at all times. They are intended for the operating
company of the system, the operating personnel and the specialists who are responsible
for the transport, assembly, installation, operation, maintenance, cleaning, disassembly
and disposal.
The Pfeuffer GmbH has prepared and reviewed these Operating Instructions with the
greatest care. However, no guarantee is made for its completeness or accuracy.
Subject to technical modifications.

Installation and operating instructions GTM 800
© 2017 –Pfeuffer GmbH Revision 3 Seite 3 von 22
Table of contents
1 Introduction .............................................................................................................................. 4
1.1 General ....................................................................................................................................... 4
1.2 Note –applied as directed ......................................................................................................... 4
2 Safety ........................................................................................................................................ 4
2.1 Symbol and note explanation..................................................................................................... 4
2.2 Operator safety instructions ...................................................................................................... 5
2.3 Working with electric components ............................................................................................ 5
2.4 Classification of zones in the protection area –operators liability .................................... 5
2.5 Instructions for use in explosion protection zone 22................................................................. 6
3 Packing, transport...................................................................................................................... 7
3.1 Transport and storage ................................................................................................................ 7
3.2 Equipment supplied.................................................................................................................... 7
4 Installation and commissioning .................................................................................................. 8
4.1 Installation procedure ................................................................................................................ 8
4.2 Assembly of the GTM800 ........................................................................................................... 8
5 Configuration............................................................................................................................. 9
5.1 Survey of the single keys and indications................................................................................... 9
5.2 Switch on .................................................................................................................................... 9
5.3 Menu Installation/Configuration................................................................................................ 9
5.4 Configuration probes................................................................................................................ 11
5.5 Reset......................................................................................................................................... 12
5.6 EXCEL-file.................................................................................................................................. 12
5.7 Auto Off/Sec ............................................................................................................................. 12
6 Routine operation.................................................................................................................... 13
6.1 Measurement ........................................................................................................................... 13
6.2 Indicate measurement ............................................................................................................. 13
6.3 Print measurement................................................................................................................... 14
7 Other settings.......................................................................................................................... 15
7.1 Menu Basic settings.................................................................................................................. 15
7.1.1 Menu Time/Date ......................................................................................................... 15
7.1.2 Menu Limits ................................................................................................................. 17
7.1.3 Menu Battery............................................................................................................... 17
7.1.4 Menu Beep .................................................................................................................. 17
7.1.5 Menu Delete data........................................................................................................ 18
7.1.6 Menu Language ........................................................................................................... 18
7.1.7 Menu Version .............................................................................................................. 18
7.2 Menu Display............................................................................................................................ 19
7.2.1 Menu Lighting on/off................................................................................................... 19
7.2.2 Menu Brightness.......................................................................................................... 19
7.2.3 Menu Contrast............................................................................................................. 20
8 Small trouble shooting - Problems and solutions....................................................................... 20
9 Technical data.......................................................................................................................... 21
9.1 Specifications (please enter): ................................................................................................... 21
9.2 Measuring device GTM 800...................................................................................................... 21
9.3 Temperature measuring probes............................................................................................... 21
10 Glossary................................................................................................................................... 21
11 Table temperature readings sensor .......................................................................................... 21
12 Declaration of conformity ........................................................................................................ 22

Betriebsanleitung GTM 800
Seite 4 von 22 Revision 3 © 2017 –Pfeuffer GmbH
1 Introduction
1.1 General
The temperature monitoring system GTM 800 allows the permanent control of temperatures in grain
stores. The microprocessor integrated in the evaluating device GTM 800 controls the measurement
process, checks the single readings of the sensors with regard to limit exceeding, sends alarm messages,
if necessary, and stores all results. An illuminated LCD-module indicates the single temperatures of the
measurement sensors. All settings and results are stored even after turning-off. A clear protocol of the
single temperature readings can be printed by means of an output unit (available as option). The various
settings allow the output of a tendency measurement. By means of a serial IR-interface (RS232) the data
can be transmitted to a PC.
The GTM 800 is a device that can only be used in Zone 22!
The Pfeuffer temperature measuring system type GTM 800 is not approved for zones 20
and 21! Please contact us before use, if this is in contradiction to your explosion
protection document. Please check whether you are subject to the regulations of the
company safety ordinance! Relevant guidelines have been published by the associations
on the Internet. We would be happy to help you if you need further information!
1.2 Note –applied as directed
The GTM 800 system is designed exclusively for the temperature measurement in grain stores. Other
applications are not allowed without permission of the manufacturer. These operating instructions draw
your attention to very important details referred to the application of the measuring system.
Unauthorized conversions are not permitted. The indications of these operating instructions referred to
operation and maintenance must be followed.
Any use beyond that is considered as application as not directed. The manufacturer does not assume
any liability for damages resulting from it. The risk must be borne by the user. It is absolutely necessary
to contact the service department of Pfeuffer GmbH, Kitzingen for any application of the measuring
system beyond the determined areas.
2 Safety
2.1 Symbol and note explanation
Operator safety symbol
You will find this symbol in connection with all notices regarding operator safety in
these operating instructions (OI), which refer to dangers to life and limb of persons.
Pay attention to these notices and be very careful in these cases. Pass all notices
regarding operator safety on to other operators. Besides the notices of these
operating instructions the general rules for safety and prevention of accidents must
be considered.
Attention note
Attention! You will find »Attention!« at points in these operating instructions, which particularly
must be complied with in order to maintain the directives, rules, notices and correct
operation and to prevent damage or destruction of the temperature monitoring
system.

Installation and operating instructions GTM 800
© 2017 –Pfeuffer GmbH Revision 3 Seite 5 von 22
Important note
Important! The note »Important!« refers to points which are important to guarantee a proper
function of the temperature monitoring system. Contrary to the attention-notice there
is, however, no danger to damage or destroy the temperature monitoring system in case
of non-compliance.
2.2 Operator safety instructions
The GTM 800 is manufactured according to the latest technological standards, especially with regard to
the rules for prevention of accidents (RPA) and is operationally reliable. This instrument can be
dangerous if it is used improperly by untrained persons or if it is not used in accordance with the
directions. We draw your attention especially to the fact that all safety precautions of the machine serve
for accident prevention, i.e. the protection of the operating and maintenance personnel and for the
machine itself.
During all works regarding mounting, dismounting, conversions, adaptations and
maintenance the system must be separated from the mains in order to avoid power
failures or short circuits.
The following notices regarding operator safety must particularly be considered:
Each person, who is concerned with commissioning, operation and maintenance (inspection,
maintenance) of the GTM 800 system in the company of the operator must have read and
understood the complete operating instructions and especially the chapter regarding safety.
The operator is obliged to use the GTM 800 system only in perfect condition.
The operator of the GTM 800 system is responsible for the safety devices, that they are not
changed, that they are working and that they are not blocked. It is not allowed to remove, make
unusable or bridge over safety devices from the machine, such as locks, covers and housing
switches.
The local rules for safety and prevention of accidents must be considered in every case before
starting the operation of the GTM 800 system.
2.3 Working with electric components
The opening of the housing as well as all repair and maintenance works at electric
components of the GTM 800 must be carried out by an electric specialist in
accordance with the VDE (Association of German Electric Engineers)-regulations as
well as the requirements of the local electric supply companies. In case of improper
use the warranty will expire.
During works at the bus wire and sensor wire, the system must be switched off.
During works in connection with the bus lead and the measurement lead the system
must be connected at zero potential
2.4 Classification of zones in the protection area –operators liability
For the installation of electrical systems in potentially explosive atmospheres ( -zone) the ATEX-
directive 2014/34/EU and for the operator’s liabilities the ATEX-directive 1999/92/EC must be applied.
Please also refer to the regulations of the Accident Prevention and Insurance BGR 104 stating that the
operator must divide his silo plant into different zones in accordance with the danger of explosion.

Betriebsanleitung GTM 800
Seite 6 von 22 Revision 3 © 2017 –Pfeuffer GmbH
Zone 20 includes all areas, in which a danger of a potentially explosive atmosphere is existing in the
form of a cloud consisting of combustible dust contained in the air permanently, over a longer period or
frequently.
Zone 21 determines the areas, in which under normal conditions an explosive atmosphere in the form of
a cloud consisting of combustible dust contained in the air can appear occasionally.
Zone 22 determines the areas, in which under normal conditions an explosive atmosphere in the form of
a cloud consisting of combustible dust contained in the air normally is not or only temporarily existing.
Remarks:
1. Layers, accumulations and piles of combustible dust which might cause an explosive atmosphere
must be taken into account just as any other cause.
2. The use of the system within the design parameters is considered to be the normal condition.
For equipment’s used in this zone a design test certificate is required. This certificate
is not available for the Pfeuffer temperature monitoring system type GTM 800!
Should this be contradictory to your explosion protection document, please contact us
prior to the installation. Please check, whether you are subject to the directions of the
operational safety regulations! Relevant guidelines were published by the
organizations on the Internet. We will be pleased to assist you, if you need further
information!
2.5 Instructions for use in explosion protection zone 22
For use in zone 22, the following notes must be observed:
1. The GTM 800 may only be operated with the protective bag. It prevents the battery
from falling out of the housing when the device falls down.
2. The temperature probes must not be exposed to a continuous grain flow. Normally
the setting of the temperature probes is done only after filling the cells/boxes. A
continuous grain flow could lead to a static charge on the surface. The insertion of
the measuring rods into the bulk does not pose any danger.
3. A battery change must always be carried out outside the ex-zone. The battery could
be lost and pose a hazard. In addition, a lost battery is to be negatively evaluated
for environmental reasons.
4. The GTM 800 may not remain permanently in the ex-zone. It is only carried for the
purpose of measuring in the ex-zone, and then removed again.

Installation and operating instructions GTM 800
© 2017 –Pfeuffer GmbH Revision 3 Seite 7 von 22
3 Packing, transport
3.1 Transport and storage
3.1.1 Notices and protective measures for the transport
Use the supplied original packing for dispatch only
Treat with usual care
Keep instrument in original packing and prevent it from moisture
Do not keep in the open
Do not put heavy objects on the packing.
3.1.2 Information about damages in transport / Inspection on receipt by the recipient
Damages in transport must be reported immediately in written form (possibly by means of a photo-
graph).
Does the supplied instrument show any scratches, dents or other damages on the supplied instrument?
3.2 Equipment supplied
Check the equipment supplied with regard to completeness. Compare the delivery note with the
delivered parts. The delivery note contains all parts delivered by us. Missing parts must be reported to
us immediately in written form. A list of all terms is included in chapter 10 –glossary.
Instrument GTM 800
Battery 9 V block
1 Measuring cable 5-pins for
temperature probes
IR module and adapter for
printer and PC (option)
Protective bag with hand strap (option)
absolutely necessary for use in zone
22!
The following item can be ordered according to individual request:
Temperature probes made of fiberglass plastic

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4 Installation and commissioning
4.1 Installation procedure
After the filling of the flat store the fiberglass probes are inserted into the bulk goods from the top. A
distance of 4-6 m per square meter (spacing) is useful, depending on the quality and the storage
conditions (e. g. humidity!).
The temperature probes must not be exposed to a continuous grain flow. Normally
the setting of the temperature probes is done only after filling the cells/boxes. A
continuous grain flow could lead to a static charge on the surface. The insertion of the
measuring rods into the bulk does not pose any danger.
The measurement sequence should be taken into consideration before starting the first measurement in
order to be able to retrace where the temperature has been taken from. We recommend to prepare a
table opposing the number of the temperature probe (1-200) with box or position number. Thus it is
possible to carry out control measurements more selectively.
The GTM 800 may only be operated with the protective bag. It prevents the battery
from falling out of the housing when the device falls down.
The GTM 800 may not remain permanently in the ex-zone. It is only carried for the
purpose of measuring in the ex-zone, and then removed again.
The measurement procedure is easy and fast. The temperature probes are connected to the GTM 800
one by one (the temperature probes must be numbered) during the normal flat store inspections. When
pressing the measurement key the GTM 800 stores the temperature readings of the temperature probe.
In case of limit exceeding an acoustic signal is sent immediately. Optionally it is also possible to connect
a printer.
Temperature probes
4-6 m spacing
4.2 Assembly of the GTM800
Due to the portability of the GTM 800 device any location for the printer (option) can be chosen. Do not
expose the printer to direct solar irradiation, heat, humidity and dust. Pay attention to a correct paper
feed when using endless paper. The mains and the interface cable should not hinder the paper feed. A
printer pillar can be supplied on request.

Installation and operating instructions GTM 800
© 2017 –Pfeuffer GmbH Revision 3 Seite 9 von 22
5 Configuration
5.1 Survey of the single keys and indications
5.2 Switch on
Press the central key :
5.3 Menu Installation/Configuration
Select the menu item »Settings« by means of the arrow keys and confirm by pressing the central
key :
800
800
800
800
Measure
Indicate
. . .SET . ..
Measure
Indicate
. . .SET . ..
Print
Settings
Switch off
. . .SET . ..
Display with key assignment
Keys

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Seite 10 von 22 Revision 3 © 2017 –Pfeuffer GmbH
Then select the menu item »Inst./Config.« by means of the arrow keys and confirm by pressing the
central key :
The window »Code ?« appears in order to protect the configuration from unintended modifications.
Set code by entering the figure » 2 « by means of the arrow keys and confirm it by means of the
central key .
Then enter the figure » 4 « by means of the arrow keys and confirm by means of the central key :
Basic settings
Display
. . .SET . ..
Display
Inst./Config.
<----
. . .SET . ..
Code ?
000

. . .NEXT. ..
Code ?
000

.++. .NEXT. .--.
Code ?
002

.++. .NEXT. .--.
Code ?
002

.++. .NEXT. .--.
Code ?
042

.++. .NEXT. .--.

Installation and operating instructions GTM 800
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Then enter the figure » 3 « and confirm by pressing the central key :
Now the menu »Installation and Configuration« appears.
5.4 Configuration probes
First select the menu and then enter the code as described under chapter 0 Select probes and
confirm by pressing the central key . Select »Number of probes« and confirm by pressing the
central key . Increase the figure until the number of probes is reached. A value from 0 to 200 is
permitted.
At the end of the setting the start menu appears again. In order to store the settings into the permanent
memory the instrument must be switched off (You also can wait until the instrument switches off
automatically after approx. 30 seconds):
Completed!
Code ?
042

.++. .NEXT. .--.
Code ?
342

.++. .NEXT. .--.
Probes
Reset
. . .SET . ..
Please wait ...
1063
.++. .SET . .--.
Number of
probes 100
.++. .SET . .--.
Settings
Switch off
. . .SET . ..
Measure
Indicate
. . .SET . ..

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5.5 Reset
»Reset« deletes the complete measuring memory and the complete configuration.
5.6 EXCEL-file
»EXCEL-file« allows the output of the temperature data in an Excel compatible file format. Select
»On/Off« by means of the arrow keys and confirm by pressing SET .
The correct reception of this format on the PC requires the configuration of the interface as well as the
use of a terminal program! If you have any questions, please contact Pfeuffer GmbH.
5.7 Auto Off/Sec
»Auto Off/Sec« regulates the period time the GTM 800 remains activated without entering any data.
This figure is indicated in seconds and can be changed by means of the arrow keys and confirmed
by pressing SET . The standard value is 100 seconds.
Please wait ...
5063
.Yes. .<- . .No.
Probes
Reset
EXCEL-file
. . .SET . ..
Delete all ?
.Yes. .<- . .No.
Reset
EXCEL-file
Auto Off/Sec
.. .SET . ..
EXCEL-file
Off
.. .SET . ..
EXCEL-file
On
.. .SET . ..
EXCEL-file
Auto Off/Sec
<----
.. .SET . ..
Auto Off/Sec
60
++ SET -- .
Auto Off/Sec
100
++ SET -- .

Installation and operating instructions GTM 800
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6 Routine operation
6.1 Measurement
Switch on the instrument. The main menu appears. Now you can move to the measurement menu by
pressing the central key . Press the left key to select the probe number. Press the right key to
start the measurement.
The GTM 800 indicates the measured readings on the display. To select the next probe, press the left
key again and then press the right key to activate the measurement.
The proceeding is the same for the measurement of the other probes.
6.2 Indicate measurement
Move to Indicate by means of the arrow keys and confirm by pressing the central key .
Probe no. 1 and the measured temperature readings appear on the display. By means of the arrow keys
the single probes can be selected. By pressing the central key you can quit the menu to return
to the main menu.
Probe no. 3
1 ---- 3 ----
2 ---- 4 ----
No.+ .SET ..Meas
Probe no. 1
1 ---- 3 ----
2 ---- 4 ----
No.+ .SET ..Meas
Measure
Indicate
.. .SET . ..
Probe no. 1
1 10.2 3 11.0
2 10.6 4 11.2
No.+ .SET ..Meas
Probe no. 2
1 ---- 3 ----
2 ---- 4 ----
No.+ .SET . .Meas
Measure
Indicate
Print
.. .SET . ..
Probe no. 1
1 10.2 3 11.0
2 10.6 4 11.2
. ++..SET . . --.
Probe no. 2
1 10.5 3 11.2
2 10.9 4 11.5
.++..SET . . --.

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6.3 Print measurement
First of all the IR interface with the adapter must be connected to the printer and an optical connection
between the instrument and the adapter must be available.
IR module at GTM 800 Printer LX 300 from the bottom side with IR module and adapter
Now select the menu »Print« and confirm by pressing the central key .
The printing starts. Please hold up the connection between the IR module and the GTM 800 until the
printing procedure is completed.
Indicate
Print
Settings
.. .SET . ..
Indicate
Print
Settings
.. .SET . ..
Print ...
Probe no. 1
.. .SET . ..

Installation and operating instructions GTM 800
© 2017 –Pfeuffer GmbH Revision 3 Seite 15 von 22
If the setting was changed to Excel format, this is indicated on the display:
The correct reception of this format on the PC requires the configuration of the interface as well as the
use of a terminal program! This format is not suitable for the output on the printer! If you have any
questions, please contact Pfeuffer GmbH.
7 Other settings
7.1 Menu Basic settings
Select the menu item »Settings« by means of the arrow keys and confirm by pressing the central
key :
Then select the menu item »Basic settings« and confirm by pressing the central key . The
window basic settings and the corresponding submenus appears:
7.1.1 Menu Time/Date
Allows the setting of date and time.
Select the menu item »Time/date« and confirm by pressing the central key . Then select the
requested menu item (time, date or reset) by means of the arrow keys:
EXCEL-file
Print
Probe no. 1
.. .SET . ..
Print
Settings
Switch off
.. .SET . ..
Basic settings
Display
.. .SET . ..
Time/Date
Limits
.. .SET . ..

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The submenus »Date« as well as »Time« offer can be indicated on the display:
or can be changed:
At the date indication you can move forward by one position by means of the arrow key .
The arrow key increases the numerical value above the selection arrow by one figure. Confirm the
requested setting by means of the central key .
The same proceeding is valid for the submenu »Time«.
The submenu »Reset time« deletes the date and time settings. After pressing the central key the
date and time settings must be readjusted.
Time/Date
Limits
.. .SET . ..
Date
Time
.. .SET . ..
Date
Time
.. .SET . ..
Display date
Set date
.. .SET . ..
Date
10:02:2017
.. .SET . ..
Date
Time
.. .SET . ..
Display date
Set date
<----
.. .SET . ..
Set date
10:02:2017

Next <- .++ .
Time
Reset time
<----
.. .SET . ..

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7.1.2 Menu Limits
Allows the determination of the upper limit at which the alarm signal is to be raised. Select the menu
item »Limits« by means of the arrow keys and confirm it by pressing the central key :
The requested temperature reading is set by means of the arrow keys in steps of 0.5°C. Confirm by
pressing the central key .
7.1.3 Menu Battery
Allows the inquiry of the battery voltage. Confirm by pressing the central key :
The voltage of a new 9 V compound battery is 9.4 V –9 V.
We recommend replacing the battery at a voltage of 7.0 V, at least, however, when the message
»Battery empty « (see chapter 8 –trouble shooting) appears on the display.
7.1.4 Menu Beep
Allows the activation and deactivation of the beep for the warning in case the set limit is exceeded.
Select the menu item »Beep« by means of the arrow keys and confirm it by pressing the central
key :
The activation or deactivation of the beep is done by means of the arrow keys . Confirm by pressing
the central key .
Time / Date
Limits
Battery
.. .SET . ..
Upper limit
28.0
. ++..SET . .-- .
Limits
Battery
Beep
.. .SET . ..
Battery 7.92V
.. .SET . ..
Battery
Beep
Delete data
.. .SET . ..
Beep on/off
Off
.. .SET . ..

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7.1.5 Menu Delete data
Allows the deletion of all stored measurement data. Confirm by pressing the central key . Then the
erasing procedure is carried out automatically. This process takes some minutes.
7.1.6 Menu Language
Allows the language selection (German/English). Press the central key to activate this option:
The selection is done by means of the arrow keys . Confirm by pressing the central key .
7.1.7 Menu Version
Allows the inquiry of the release. Activate this option by pressing the central key :
Beep
Delete data
Language
.. .SET . ..
Please wait ...
3018
.. .SET . ..
Delete data
Language
Version
.. .SET . ..
Language/Sprache
english
.++..SET . .-- .
Language
Version
<----
.. .SET . ..
Version 1.00
GTM 800 11.11.04
.. .SET . ..

Installation and operating instructions GTM 800
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7.2 Menu Display
Allows the modification of the display settings (illumination, brightness, contrast). Confirm by pressing
the central key .
7.2.1 Menu Lighting on/off
Allows the activation and deactivation of the display illumination. Activate this menu item by pressing
the central key . The illumination is switched on or off.
7.2.2 Menu Brightness
Allows the setting of the illumination intensity. Confirm this menu item by pressing the central key .
The requested degree of brightness can be selected by means of the arrow keys in steps of 20 %.
Press the central key after the setting.
Print/Output
Display
Inst./Config.
.. .SET . ..
Light on/off
Brightness
.. .SET . ..
Light on/off
Brightness
.. .SET . ..
Light. on/off
Brightness
Contrast
.. .SET . ..
Set brightness
100%
.++. .SET . .-- .

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7.2.3 Menu Contrast
Allows the setting of the display contrast. Confirm the setting by pressing the central key .
The requested contrast intensity is selected by means of the arrow keys in steps of 3-5 %. The basic
setting should be between approx. 51 % and 64 %. Confirm the setting by pressing the central key .
8 Small trouble shooti ng - Problems and solutions
Error message
Cause
Battery is empty. Confirm error message by means of the central key
and replace the battery or charge the accumulator, see chapter 7.1.3.
You should only use the following battery or accumulator types:
-9 V compound battery Alkali Mangan, 6LR61, 550 mAh
-9 V accumulator / 120 mAh
A battery change must always be carried out outside the ex-zone. The battery could
be lost and pose a hazard. In addition, a lost battery is to be negatively evaluated for
environmental reasons.
Brightness
Contrast
<----
.. .SET . ..
Contrast
51%
.++. .SET . .-- .
Battery empty