Pfeuffer GT 1 User manual

Artikelnummer Betriebsanleitung: 1332 1197
Item no. operating instructions:
Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Phone: [phone]
[e-mail] Revision 4/10.02.2021
www.pfeuffer.com Translation of the original operating instructions
Operating instructions
Temperature measuring probe GT 1

Translation
On delivery or subsequent sale to 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 referred to for clarification, or else
contact the manufacturer.
Operating instructions in electronic format
The original operating instructions (German) and translations of the original operating instructions can be
requested in PDF file format via e-mail: d[email protected]om. Specifying the correct type designation and
serial number is important for further processing!
© Copyright
This document is not allowed to be communicated or duplicated, utilized 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)
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These operating instructions form part of the temperature measuring probe
GT 1 and must be available to the operating personnel at any time. They are
intended for the owner of the system, the operating personnel and the
specialists who are responsible for transport, setup, installation,
commissioning, 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.

Table of contents
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1Introduction ..............................................................................................................4
Designated use ...................................................................................................... 4
Declaration of Conformity ..................................................................................... 5
Structural features of the danger notes ................................................................ 6
Pictograms in the operating instructions............................................................... 6
2Safety........................................................................................................................7
3Technical data ...........................................................................................................8
Dimensions ............................................................................................................ 8
Weight ................................................................................................................... 8
Power supply ......................................................................................................... 8
General data .......................................................................................................... 8
4Delivery, transport and storage.................................................................................9
Scope of delivery ................................................................................................... 9
Transport and packaging ....................................................................................... 9
Intermediate storage............................................................................................. 9
Return transport.................................................................................................... 9
5Operation................................................................................................................10
Overview.............................................................................................................. 10
Insert and change battery.................................................................................... 10
Display modes...................................................................................................... 11
MAX / MIN memory............................................................................................. 12
Setting the time ................................................................................................... 13
Switching off the GT 1.......................................................................................... 13
Perfroming measurements.................................................................................. 14
5.7.1 Measure haystack.................................................................................... 14
5.7.2 Influence of moisture and storage temperature on the shelf life of grain .... 16
5.7.3 Monitoring of grain stocks is essential..................................................... 17
Measurement uncertainty................................................................................... 17
6Cleaning and maintenance ......................................................................................18
Cleaning ............................................................................................................... 18
Maintenance........................................................................................................ 18
7Malfunctions – causes and rectification...................................................................19
8Spare parts..............................................................................................................19
9Disposal...................................................................................................................19
Measurement table for haystack ...........................................................................20

Introduction
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1Introduction
Designated use
The temperature measuring probe GT 1 is a versatile assistant in agriculture and in
smaller grain storages. The temperature measurement range is from -10 °C to +70 °C
in loose agricultural bulk materials as cereal, silage, compost, hay and straw. The GT 1
is designed for measuring in the stack at different depths and at the surface. It has two
temperature sensors, one in the measuring tip (OUT) and one in the housing (IN).
The GT 1 is not waterproof and designated for use only in closed rooms. Protect it
against moisture and humidity.
The GT 1 is designed as a portable device to be operated by batteries.
The GT 1 is not intended for private use.
NOTE The GT 1 is exclusively intended for the aforementioned purpose.
Any other use beyond this definition or conversion of the GT 1 without
written consultation with Pfeuffer GmbH is regarded as contrary to
the intended use.
Pfeuffer GmbH will not be liable for any damage resulting from this!
The risk is the responsibility of the owner alone.
The GT 1 is not appropriate for the measurement of liquid and sticky
products!
The samples to be used for intended operation of the GT 1 are
obtained by the owner.
Correct treatment of these materials and the associated risks are
exclusively the responsibility of the owner.
The owner must also provide notes on danger and notes on disposal.
The designated use also includes complying with the operating instructions as well as
the maintenance and servicing conditions as defined in these operating instructions.

Introduction
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Declaration of Conformity
EU Declaration of Conformity
Manufacturer: Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
This Declaration of Conformity is issued under the sole responsibility of the
manufacturer.
Person authorized to compile the technical documents: Lothar Pfeuffer, General Manager
Product: Temperature measuring probe GT 1
Serial number _________________________________
The aforementioned product complies with the requirements of the following
directives:
-2014/35/EU Low voltage
-2014/30/EU Electromagnetic compatibility (EMC)
Any modification to the GT 1 not agreed with us shall result in this declaration losing
its validity.
Kitzingen, ________________ ___________________________________
Lothar Pfeuffer, General Manager

Introduction
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Structural features of the danger notes
The operating instructions from Pfeuffer GmbH contain instructions that you must
comply with for your personal safety as well as to avoid damage to property.
Information intended for your personal safety is highlighted by a warning triangle.
Comply with the following categories of danger notes and explanations of symbols:
Pictogram
SIGNAL WORD
Type of danger and its source.
Possible consequence of failure to comply.
Measure to guard against the danger.
DANGER
This is a warning about a highly dangerous situation that will lead to
serious or fatal injuries.
WARNING
This is a warning about a dangerous situation that may result in
serious or fatal injuries.
CAUTION
This is a warning of a possibly dangerous situation that will lead to
slight or moderate injuries.
NOTE This is a
warning about harmful situations for the product and/or
environment.
Pictograms in the operating instructions
Information of particular
importance and/or
additional information
Warning
of cut danger
Warning
Warning
of corrosive substances

Safety
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2Safety
NOTE Opening the housing and inappropriate operation will invalidate the
warranty.
Obligations on the owner
In the European Economic Area (EEA), it is mandatory to comply with
and follow the national implementation of the general directive
89/391/EEC as well as the corresponding individual directives and, of
these, in particular Directive 2009/104/EC "concerning the minimum
safety and health requirements for the use of work equipment by
workers at work", in each case in the valid version.
In addition, he/she must comply with the local legal requirements on:
Safety of personnel (accident prevention regulations)
The accident prevention regulations DGUV regulation 3 (previously BGV A 3)
"Electrical systems and equipment" (DGUV = German Social Accident Insurance Association)
Safety of work equipment (protective equipment and maintenance)
Product disposal (waste legislation)
Material disposal (waste legislation)
Cleaning (cleaning agents and disposal)
Hazardous substances
(in Germany, the Technical Rules for Hazardous Substances – TRGS 555 apply)
Environmental protection regulations.
General safety notes
The safety devices and safety information given in these operating
instructions must be complied with.
Do not allow the GT 1 to become damp during transport, storage, cleaning and
operation.
Only use the GT 1 when it is in correct condition.
Never touch the battery or the rechargeable battery with moist hands.
Only use genuine spare parts and accessories (see chapter 8).

Technical data
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3Technical data
GT 1
Temperature measuring probe
Products
Cereal, silage, compost, hay and straw
Parameter
Temperature
Dimensions
Models for cereals, oilseeds and grains (with cone tip):
Length
Item no.
GT 1
1.5 m
1332 1102
GT 1-2
2.0 m
1332 1108
GT 1-3
2.8 m
1332 1103
Model for silage (with knife tip):
Length
Item no.
GT 1S
0.5 m
1332 1105
Models for hay, straw and compost (with knife tip):
Length
Item no.
GT 1H
1.5 m
1332 1106
GT 1-3H
2.8 m
1332 1107
Weight
Total weight depending on the model
approx. 350 to 530 g
Power supply
Battery or rechargeable battery
Micro AAA 1.5 V
General data
Ambient temperature for
storage and transport
-10 °C to +60 °C
Measuring range
-10 °C to +70 °C
Measurement accuracy (knife tip)
±1 °C
Atmospheric humidity
20 % – 80 % non-condensing

Delivery, transport and storage
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4Delivery, transport and storage
Scope of delivery
The standard scope of delivery to the owner comprises:
1. Temperature measuring probe GT 1
2. Battery, Micro AAA 1,5 V
3. (Tip for haystack measurement (knife and knife carrier) for GT 1S or GT 1H)
4. Operating instructions
Transport and packaging
Systems, machines and instruments from Pfeuffer GmbH are carefully checked and
packaged before shipping; nevertheless, it is impossible to rule out the possibility of
transport damage entirely.
Incoming check
Check for completeness with reference to the delivery note.
In case of damage
Check the delivery for damage (visual inspection).
In case of complaints
If the delivery suffered damage in transit:
Keep the packaging (to allow it to be checked subsequently by the forwarding
company, or for sending back).
Immediately inform the supplier or Pfeuffer GmbH.
Intermediate storage
The shipping packaging of the GT 1 and its accessories and replacement parts is
designed for a storage period of six months from delivery.
Do not place any heavy objects on the packaging.
Storage conditions
Enclosed, dry room with a room temperature between min. -10 °C and max. +60 °C.
Keep the original packaging in case you need to send the equipment back.
Return transport
If possible, use the original packaging and the original packaging material.
If neither is available any longer, request new packaging from Pfeuffer GmbH.

Operation
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5Operation
Overview
1 2 3 4 5
Figure 1: Temperature measuring probe GT1
Item
Designation
1
Glass fiber reinforced plastic probe (various lengths available)
2
LC display
3
Grip
4
Tip for haystack measurement for GT 1H or GT 1S
5
Cone tip
Insert and change battery
Figure 2: Insert battery
A commercially available Mikro AAA 1,5 V
battery is required for powering the GT 1.
Open the battery compartment on the back
of the display device by laterally sliding the
cover in the arrow direction.
Insert the battery according to the polarity.
Close the cover.
The GT 1 is ready for use.

Operation
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To avoid battery leakage, remove the battery when not using the GT 1 for a longer
period.
CAUTION
A non-rechargeable battery cannot be recharged!
This can lead to dangerous acid leakage.
Acid contact can cause skin irritation, burns and corrosion.
Return used batteries/rechargeable batteries to a municipal collecting
facility or retail outlet.
Disposal as normal domestic waste is prohibited, and represents a
violation of battery legislation.
Display modes
IN = Temperature inside the measuring instrument (outside the
grain pile)
OUT = Temperature on the measuring tip of the GT 1
Use the button CLOCK / TEMP on the front to change between the different display
modes.
It can take up to 10 seconds until the display has adjusted to the temperature change,
as the measuring interval is 10 seconds.
Standard display:
Temperatur
e inside the measuring
instrument (IN):
Temperature on the measuring tip (OUT):

Operation
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Button CLOCK / TEMP pressed once:
Time:
Temperature inside the measuring
instrument
(IN):
Button CLOCK / TEMP pressed twice:
Time:
Temperature on the measuring tip (OUT):
MAX / MIN memory
To save the minimum or maximum
temperatures at the temperature
sensors press once on the button
MEMORY.
The display shows MEM before the
temperature value.
Then press once the button MAX /
MIN to read the corresponding
temperature maxima.

Operation
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
Press a second time on the button
MAX / MIN to read the temperature
minima.
To clear the memory press again on
the button MEMORY so that the
indicator MEM disappears.
Setting the time
Press once on the button CLOCK /
TEMP to switch into Time mode.
With the button HR on the back of
the LC display you set the hours and
with the MIN
button you set the
minutes.

Press the appropriate button until
the desired time is set.
Switching off the GT 1
Depending on the model, you can use
the slide switch to change the
temperature display from °C to °F
(degrees Fahrenheit).
To switch off the GT 1, remove the
battery in this case.
Or you can switch on or off the GT 1
directly with the ON / OFF slide
switch.
HR
MIN
°C
°F

Operation
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Perfroming measurements
With the GT 1 temperatures from -10 °C to +70 °C can be measured.
NOTE To avoid damages of the temperature measuring probe, protect the
GT 1 against direct sunlight and extreme temperatures in excess of
+70 °C!
For a correct measurement the temperature in the metal tip has to adjust to the
temperature in the measured product. This depends on the temperature difference
between the measured product and the measuring probe and can take a few minutes.
Temperatures below -10 °C are displayed with LLL, temperatures over +70 °C are
displayed with HHH. The GT 1 collects the temperature of the grain that is directly in
contact with the tip of the probe. There can be huge temperature differences
depending to the different points in the pile/bale. Therefore, you should make
measurements in at least 5 different areas of the pile/bale. Use the highest value as
reference.
Refer to an expert for detailed i
nformation about the adequate
temperature for the storage of grain, compost, silage, hay and straw.
The information and instructions in the chapters 5.7.1 to 5.7.3 are for
a rough overview only and is not exhaustive.
All statements without guarantee!
5.7.1 Measure haystack0F
1
Because of the danger of self-ignition, the farmer must check the temperature of the
stored material for three months regularly with a temperature measuring probe. In fire
hazard immediately take the necessary measures. (§ 16 VVB1F
2).
This obligation is exacerbated by VdS safety2F
3, as outside Bavaria you have to inform
the fire department at a haystack temperature from more than +60 °C.
Start the measurement one or two days after putting into storage.
Then continue measuring for twelve weeks (at least once a week).
Perform control measurements at locations with high temperature.
Measure at least at five points and different depths.
In particular, measure at the discharge points of the hay elevator or under the blow-
out openings of the hay blower.
1Source: Brochure Risk-Management – Measure haystack, Insurance chamber Bavaria/Germany, www.vkb.de
2Regulation on the prevention of fires (only in Bavaria/Germany)
3VdS Loss prevention Ltd., www.vds.de

Operation
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At temperatures of more than +60 °C, measure several times a day and notify the
fire department as a precaution.
Make a note of the measured values in a measurement table, and keep this care-
fully as information for the insurance company.
(There is a measurement table on the last page of these operating instructions or contact
your fire insurance)
Over +70 °C – acute fire danger
Call the fire department!
Use of a special instrument to cool down the
bale.
Clearing away of the heated haystack in the
presence of the fire department
ready to
extinguish!
Extinguishing of smouldering areas.
Up to +70 °C – fire danger
Special attention necessary!
Measure at intervals of maximum of five hours
Up to +60 °C – critical
1. and 2. week
Measure every other day
3. and 4. week
Measure every third day
5. until 12. week
Measure once a week
Up to +45 °C – harmless
1. week
Measure every other day
2. until 4. week
Measure twice a week
5. until 12. week
Measure once a week
CAUTION
Risk of injury on pointed objects!
To avoid cuts
never transport the GT 1 with the knife screwed on!
take out the knife carrier of the packaging first at the measuring
point.
unscrew the knife carrier from the GT 1 after each measurement.
clean the knife carrier and the knife carefully.
keep it in the packaging intended for it.

Operation
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5.7.2 Influence of moisture and storage temperature on the shelf life of grain
Moisture and temperature have a big influence on the shelf life of seeds, bread stuffs
and feed grain. The following tables give a rough guide about possible storage times
depending on moisture and storage temperature.
All statements without guarantee!
Seeds and brewing barley
Moisture in %
Storage temperature in °C
Shelf life approx.
12 – 15
9 – 12
permanently
15 – 16,5
8 – 10
1 – 1,5 years
16,5 – 18
5 – 7
4 – 6 months
18 – 20
5
2 – 3 months
20 – 22
5
2 – 4 weeks
22 – 25
5
1 – 2 weeks
25 – 30
4 – 5
2 – 3 days
More than 30
-
-
Bread stuffs
Moisture in %
Storage temperature in °C
Shelf life approx.
12 – 15
10 – 12
permanently
15 – 16,5
9 – 10
permanently
16,5 – 18
8 – 10
8 – 14 months
18 – 20
8 – 10
6 – 10 months
20 – 22
6 – 8
8 – 12 weeks
22 – 25
5 – 7
3 – 8 weeks
25 – 30
4 – 5
5 – 10 days
More than 30
-
-
Feedgrains
Moisture in %
Storage temperature in °C
Shelf life approx.
12 – 15
10 – 14
permanently
15 – 16,5
10 – 12
permanently
16,5 – 18
8 – 10
10 – 20 months
18 – 20
8 – 10
8 – 16 months
20 – 22
8 – 10
16 – 40 weeks
22 – 25
5 – 8
10 – 25 weeks
25 – 30
4 – 5
14 – 30 days
More than 30
4 – 5
a few days

Operation
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5.7.3 Monitoring of grain stocks is essential
Detail of the original article by H.-J. Plesse LWK Hannover:
(...) Experience has shown that grain cannot be stored over a longer period of time
without the corresponding monitoring. This means that the grain is cooled down to a
final temperature of ca. 6 to 8°C, a temperature at which the above mentioned
phenomenons cannot develop anymore. At the same time the development of fungi,
microorganisms and pest is constrained or eliminated. (...)
An increasing storage time leads to a cooling down of the sides of the pile or the outer
layers. Resulting from the warmer core, a thermal develops which carries the released
water vapor inwards or upwards. Sooner or later this will lead to a moist surface of the
pile and to a germination of the corn. (...)
Temperature monitoring of the grain pile is essential to cool down the pile in case it
heats up again too much. This can be done at low costs by means of stick in
thermometer like the GT 1. However, this requires access from above. (...)
When ventilating or cooling by means of ambient air, the grain temperature as well as
the ambient temperature and the relative humidity play a role.
If there is a difference of at least 5 to 6 °C, the pile can be ventilated a certain time even
with a high humidity. The air that is blown into the pile is heated by the grain. With each
°C the relative humidity decreases by ca. 5 %, so that a moisture equilibrium to the dry
grain is reached. The pile temperature relevant for the ventilation should be measured
in the lower half of the silo, as this part cools down soonest. (...)
If a compressor cooling aggregate is used, the air is processed technically. In this case
the parameters for temperature and moisture can be set correspondingly and stay
constant, so that the ventilation can be done day and night. (...) A part of the emerging
process heat is used to heat up the cooled down air, so that the relative humidity
equals the equilibrium moisture of dry grain. This has a favorable drying effect, even if
only a small one. (...)
Measurement uncertainty
The accuracy of the results of the GT 1 is influenced by many parameters.
Exposure time in the bulk: The exposure time in the bulk is decisive for the
temperature adjustment of grain and measuring probe. Wait at least 2 (better 5)
minutes!
The accuracy of the measuring instrument is about ±1 °C. However, the change of
temperature in the bulk is more important than the absolute accuracy. There it is
important to make measurements at the same points and to note down the results.
Due to the spatial separation between tip and measuring instrument, there can be
differences between the displayed temperatures.

Cleaning and maintenance
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NOTE Do not misinterpret the result of the GT 1
as the one and only
reference, as there are many parameters that can influence the value.
Nevertheless the measuring results are very helpful for the safe
storage of grain, hay and straw.
6Cleaning and maintenance
NOTE Opening the housing and
inappropriate operation will invalidate the
warranty.
Cleaning
NOTE
Do not use any sharp objects or tools for cleaning. Only use objects that
are expressly intended for this purpose.
During cleaning, make sure that no water, steam or dust can penetrate
the electronics area.
Cleaning and maintenance intervals:
AEM = After each measurement
AR = As required
Measure
Interval
Clean the LC Display with a clean, lint-free cloth.
AR
Clean the probe and the measuring tip with a clean, lint-free cloth or use a
moist cloth in case of heavy contamination
AR
Maintenance
Check the GT 1 for wear and tear at regular intervals.
The inspection intervals depend on the significance of the measured value, the
frequency of use and the ambient conditions to which the GT 1 is exposed. Only
through regular checks (visual inspection) can damage to the device caused during use
be detected early and reliably.

Malfunctions – causes and rectification
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7Malfunctions – causes and rectification
If the specified measures do not prove successful, contact
Pfeuffer GmbH.
Problem Cause Rectification
Unrealistic result
in the display
Display is set to °F.
Set the slide switch on the back of the
LC display to °C.
Or remove battery, wait 10 seconds
and insert again.
No display
Battery is empty.
Change battery.
8Spare parts
NOTE It is expressly pointed out that spare and accessory parts not supplied
by us will not have been tested and approved by us either. Installing
and/or using such products can thus lead to negative changes to the
design properties of the GT 1 under certain circumstances.
Pfeuffer GmbH cannot be held liable for damage attributable to the
use of non-genuine parts and non-genuine accessories.
Standard parts can be obtained from the dealer.
Product
Item number
Knife tip (knife and knife carrier)
2150 0200
9Disposal
The GT 1
must be disposed of according to applicable local
environmental regulations (directive for e
lectric and electronic
equipment waste 2012/19/EU).
Dispose of battery, see chapter 5.2.

Measurement table for haystack
Name: ____________________________ Location:____________________________
Period Measurement point and depth Temperature
2 days after
putting into
storage
Date:
1 week after
putting into
storage
Date:
2 weeks after
putting into
storage
Date
3 weeks after
putting into
storage
Date
4 weeks after
putting into
storage
Date
(Copying template – scale up to DIN A4 size using 141 % zoom)