Pfeuffer HE lite User manual

Artikelnummer Betriebsanleitung:
1170 0071
Item no. operating instructions:
Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Phone: + 49 9321 9369-0
[e-mail] Revision 10/03.03.2023
www.pfeuffer.com Translation of the original operating instructions
Operating instructions
for the grain moisture meter
HE lite

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. 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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Operating instructions HE lite | Revision 10
These operating instructions form part of the moisture meter HE lite 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, commissionin
g, 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
1.1 Designated use ..............................................................................................................................4
1.2 EU Declaration of Conformity........................................................................................................5
1.3 Structural features of the danger notes ........................................................................................6
1.4 Pictograms in the operating instructions.......................................................................................6
1.5 Identification .................................................................................................................................6
2Safety ..............................................................................................................................................7
3Technical data..................................................................................................................................7
3.1 Dimensions....................................................................................................................................7
3.2 Weight...........................................................................................................................................7
3.3 Power supply.................................................................................................................................8
3.4 General data..................................................................................................................................8
4Delivery, transport and storage........................................................................................................8
4.1 Scope of delivery ...........................................................................................................................8
4.2 Transport and packaging ...............................................................................................................9
4.3 Intermediate storage.....................................................................................................................9
4.4 Return transport............................................................................................................................9
5Operation ......................................................................................................................................10
5.1 Operation elements ....................................................................................................................10
5.2 Preparation of a sample ..............................................................................................................10
5.3 Filling the measuring cell and grinding ........................................................................................11
5.4 Measuring procedure ..................................................................................................................12
5.5 Automatic temperature correction .............................................................................................14
5.6 Maize, especially humid maize, e. g. freshly harvested maize.....................................................14
5.7 Sunflower seeds ..........................................................................................................................14
6Settings – Instrument options ........................................................................................................15
6.1 Battery and Version.....................................................................................................................15
6.2 Offset...........................................................................................................................................16
6.3 Code-Eingabe ..............................................................................................................................16
6.4 Setting of the products................................................................................................................17
6.5 Reset ...........................................................................................................................................19
6.6 Average .......................................................................................................................................19
6.7 Illumination .................................................................................................................................21
6.8 Contrast.......................................................................................................................................22
6.9 Reset brightness and contrast .....................................................................................................23
7Cleaning and maintenance .............................................................................................................24
7.1 Cleaning.......................................................................................................................................24
7.1.1 Measurement cell..........................................................................................................24
7.1.2 Threads and contact surfaces of the measurement cell................................................25
7.2 Maintenance ...............................................................................................................................26
7.3 Power supply and battery change ...............................................................................................26
8Malfunctions – causes and rectification..........................................................................................27
9Supplements and accessories.........................................................................................................27
10 Disposal.........................................................................................................................................28

Introduction
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Operating instructions HE lite | Revision 10
1Introduction
1.1 Designated use
The HE lite continues the thousandfold approved technique of its predecessor model
HE 50, which has worked satisfactorily as versatile and precise device for agriculture.
The HE lite can be used for the determination of the moisture content of cereals,
oilseeds and maize. While closing the measuring cell the sample to be measured is
ground, homogeneously mixed and pressed together inside the measuring cell.
Compared with his predecessor it convinces owing to the smaller design and improved
ergonomics. The HE lite is thus an important companion on the field, during drying and
when storing.
The HE lite is designed as a portable device to be operated by batteries.
The HE lite is not intended for private use.
NOTICE The HE lite is exclusively intended for the aforementioned purpose.
Any other use beyond this definition or conversion of the HE lite
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.
It is not allowed to measure respectively grind solid and substantial
matters made of metal, stone, concrete, liquids or other foreign
components.
The samples to be used for intended operation of the HE lite 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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1.2 EU Declaration of Conformity
In accordance with the EU Directives:
-Electromagnetic Compatibility (EMC) 2014/30/EU
-Directive on the restriction of the use of certain hazardous substances
in electrical and electronic equipment (RoHS) 2011/65/EU
Manufacturer:
Pfeuffer GmbH Phone: [phone]
Flugplatzstraße 70 [e-mail]
97318 Kitzingen www.pfeuffer.com
GERMANY
The manufacturer bears sole responsibility for issuing this Declaration of Conformity.
Person authorized to compile the technical documents: Lothar Pfeuffer,
General Manager
Product: Moisture meter HOH-EXPRESS HE lite
Serial no. _______________________________
The aforementioned product complies with the requirements of the following
harmonized standards:
DIN EN 61326-1:2013
DIN EN IEC 63000:2019
Any modification to the HE lite not agreed with us shall result in this declaration losing
its validity.
Kitzingen, ___________________ ________________________________
Lothar Pfeuffer, General Manager

Introduction
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Operating instructions HE lite | Revision 10
1.3 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:
CAUTION
This is a warning of a possibly dangerous situation that will lead to
slight or moderate injuries.
NOTICE This is a warning about harmful situations for the product and/or
environment.
1.4 Pictograms in the operating instructions
Information of particular
importance and/or
additional information
Warning of corrosive
substances
Comply with the operating
instructions
Disposal via normal
household waste
prohibited!
Warning
Recycling marking –
Supply refuse for recycling
Warning of electrical voltage
1.5 Identification
The information in these operating instructions only applies to the device with the type
designation indicated on the title page.
The type plate with type designation is located on the back of the measuring device.
It is important to state the type designation and serial number with all queries. Only in
this way will rapid processing be possible.

Safety
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2Safety
NOTICE Opening the housing and inappropriate operation will invalidate the
warranty.
General safety notes
The safety devices and safety information given in these operating
instructions must be complied with.
Do not allow the HE lite to become damp during transport, storage, cleaning and
operation.
Only use the HE lite 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 9).
3Technical data
HE lite
Electronic grain moisture meter
Products
Grains, maize, oilseeds
Parameter
Moisture
3.1 Dimensions
Measurement device:
Height
50 mm
Height with measurement cell in place
85 mm
Width
82 mm
Length 200 mm
Case:
Height
83 mm
Width 230 mm
Length
275 mm
3.2 Weight
Measuring device
approx. 0.9 kg
Measuring device and case
approx. 1.4 kg

Delivery, transport and storage
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Operating instructions HE lite | Revision 10
3.3 Power supply
Battery or rechargeable battery
3 pcs. battery 1.5 V mignon cells size AA
3.4 General data
Ambient temperature for storage and
transport
-10 °C to +60 °C
Ambient temperature for measurement
+10 °C to +30 °C
Atmospheric humidity
20 % to 80 % non-condensing
4Delivery, transport and storage
4.1 Scope of delivery
Scope of delivery HE lite
The standard scope of delivery to the owner comprises:
Item
Designation
1
Plastic housing with integrated electronic measurement device and
bottom unit of the measuring cell
2
Top unit of the measuring cell with 11 ml filling measure
3
Brush for cleaning
4
Cleaning paintbrush
5
3 pieces batteries 1.5 V (round cell, size AA)
6
Carrying case with foam insert
not illustr.
Operating instructions
For the particular article numbers, refer to chapter 9.
1
2
3
5
4
6

Delivery, transport and storage
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4.2 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.
4.3 Intermediate storage
The shipping packaging of the HE lite 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.
4.4 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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Operating instructions HE lite | Revision 10
5Operation
NOTICE Protect the HE lite against direct sunlight and extreme temperatures
in excess of +50 °C!
5.1 Operation elements
The HE lite switches off automatically after 30
seconds, if no button was pressed in the meantime.
The display has four lines. In the last line the current
function of the buttons is indicated in white letters
on black background. In the picture on the right,
arrow to the left, measure and off.
The instrument is equipped with three operational
buttons. The arrow buttons and the On/Off-button
have additionally th
e function indicated on the
display. The appropriate function is indicated above
each button.
5.2 Preparation of a sample
NOTICE Optimum measurement results can be achieved with cleaned
samples.
Extraneous constituents (e.g. stones, straw, husks, weed seeds, green
grains or pieces of stalk from maize) must be removed prior to the
measurement!
The temperature correction is performed automatically.
Ambient temperature
for measurement
Moisture
+10 °C to +30 °C
20 % to 80 %, non-condensing
Measurements below or above the specified temperature are
possible, but do represent a risk of yielding inaccurate measurement
values!
Allow the product samples to adjust to the ambient temperature!
This applies in particular to:
•Frozen samples, because the condition of aggregation of water
is significant for the measurement.
•Hot samples, e.g. taken during the drying process.
12.1 %
Weizen
<—
Mess.
AUS

Operation
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NOTICE Products with extreme surface moisture must be dried before
homogenization.
Measurement results from samples that already give off a
fermentation smell may be subject to greater errors than freshly
harvested samples.
To achieve an exact measurement result, it is necessary to have a
sample quantity of approx. 11 ml (corresponds to the filling level in
the upper part of the measuring cell).
5.3 Filling the measuring cell and grinding
The measuring cell is equipped with special ribbing allowing the crushing of grain and
oil seeds.
Open the top unit of the measuring cell anticlockwise.
Fill the filling level (11 ml) inside the upper part of the measuring cell to the brim with
the cleaned sample:
Empty the contents of the filling measure evenly into the bottom unit of the
measuring cell:

Operation
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Operating instructions HE lite | Revision 10
Place the top unit of the measuring cell and screw it down clockwise up to the limit
stop:
This position guarantees that the measuring cell is
always closed tightly exactly in the same way.
NOTICE Close the measuring cell at one go. Repeated back-and-forth
movement is not necessary and can worsen the measuring result.
5.4 Measuring procedure
NOTICE
Remove moist milled material from the measurement cell
immediately after performing the measurement!
Clean the measurement cell and the spindle after each measure
ment,
see chapter 7.1.
The measurement cell is equipped with special fluting to allow all
grain-type products to be crushed.
To avoid damage, the measurement cell is not allowed to be screwed
together bringing the milling disks into contact without any material
fill.

Operation
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Switch on HE lite: Press the central button .
The display indicates the product list (see picture
below) and the function of the three buttons. The
product measured last is marked by an arrow on the
display.
Choose the product by means of the arrow buttons:

If the arrow button
is next to the product to be
measured, press the central button marked by Meas.
in order to start the measurement:
Measure ...
Wheat
<—
OFF
Measure... indicates on the display.
12.1 %
Wheat
<—
Meas.
OFF
Then the display indicates the measured moisture
reading and the previously selected product. The
temperature of the sample is corrected auto-
matically.
To measure a different product press the button(<–) select it by means of the arrow
buttons  and press the central button for measure = Meas. .
NOTICE
Repeated pressing of the measure button can lead to slightly
different measuring results, since the calibration is optimized for a
single measurement.
Triticale
→Wheat
Settings
↑
Meas.
↓

Operation
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Operating instructions HE lite | Revision 10
12.1 %
Wheat
<—
Meas.
OFF
To switch off the device press the button

OFF or
wait for 30 seconds.
If the measuring cell is empty or if the sample is too dry, the reading which was too low
or too high, e.g. < 9 % depending on the selected calibration, indicates on the display.
Product and measuring ranges:
Wheat................... 9 to 35 %
Rye........................ 9 to 35 %
Barley ................... 7 to 38 %
Oats ...................... 8 to 35 %
Rapeseeds ............ 4 to 30 %
Maize.................... 8 to 45 %
Sunflower ............. 5 to 25 %
Triticale................. 9 to 35 %
5.5 Automatic temperature correction
The temperature correction is executed automatically. Reliable results are obtained at
ambient temperatures between +10 °C to +30 °C. For optimal results the device and
the sample to be tested should have nearly the same temperature. Warm grains just
taken from the drier should be measured after cooling down. Cold grain should be
allowed to warm up to ambient temperature, e.g. by spreading it out on a sheet metal.
5.6 Maize, especially humid maize, e. g. freshly harvested maize
For maize, use well-filled measuring cup (slightly heaped). When changing from moist
to very dry samples, e.g. during drying we recommend to carry out a "blank test". The
measurement takes place as with the normal measurement, but the result is not taken
into consideration. For this purpose, fill the measuring cell, close it, open it and refill
the measuring cell again with the filling measure slightly heaped with maize, close it
and only then carry out the measurement.
5.7 Sunflower seeds
For sunflower seeds, measure with a lightly heaped measuring cup.

Settings – Instrument options
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6Settings – Instrument options
Triticale
→Wheat
Settings
↑
Meas.
↓
The submenu Settings allows the inquiry and modification
of different parameters. To select the menu, proceed as
follows:
Switch on the device. The display indicates the product list
and the function Meas.
Wheat
→Settings
Off
↑
Set
↓
Select Settings by means of the arrow buttons

and
press the central button .
Battery
→Offset
Average
↑
Set
↓
Now the display indicates the menu items: Battery, Offset
and Average.
Change to the appropriate menu items by pressing

:
Menu:
Function:
Battery
Measurement of battery voltage
Offset
Calibration function, modification of the reading
Average
Setting of average calculation during the measurement
Lighting
Setting the backlight in the display
Contrast
Setting the display contrast
<----
Return to the initial menu
The selected menu item is called by pressing the central button .
6.1 Battery and Version
→Battery
Offset
↑
Set
↓
To measure the battery voltage select Battery and press
the central button .
Battery
4.6 V
<—
Bat
CRC
Normal voltage is 4.7-4.5 V, new batteries have been
inserted.
Battery
change ...
Bat< 3.3V
If the voltage is < 3.3 V no more measurements can be
carried out, the HE lite switches off automatically. The
batteries must be replaced.

Settings – Instrument options
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Operating instructions HE lite | Revision 10
Example:
Version 1.4 Eng
PRG: R8A5
DAT: 9FFE
<—
Bat
CRC
The right button CRC
allows the user to inquire the
software and calibration version. To return to the function
battery voltage measurement, press the button Bat.
By pressing (<–) you return to the submenu Settings.
6.2 Offset
Battery
→Offset
Average
↑
Set
↓
Each single product can be calibrated by means of an
additive constant factor (Offset) within a possible range of
-2 % to +2 % (in steps of 0.1 %). In addition to this the
device offers the possibility to enter a factor, allowing
linearly ascending corrections.
Select the function Offset and then press the central
button Set .
6.3 Code-Eingabe
→Code: 002
↑
Set
↓
A code inquiry prevents unintentional adjustments of the
device. CODE 001 is indicated on the display.
Enter the figure 2by means of the left arrow button

.
→Code: 042
↑
Set
↓
and move to the next figure by pressing the central
button .
Set figure 4by means of the left arrow button

→Code: 342
↑
Set
↓
and move to the next figure by pressing the central
button .
Enter the figure 3by means of the left arrow button

.
Now the correct code 342 indicates on the display and
must be confirmed by pressing .

Settings – Instrument options
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6.4 Setting of the products
→Barley
Oats
↑
Set
↓
After entering the code (see chapter 6.3) the product list
is indicated on the display in the same way as for the
product selection during the measurement.
Select the product to be adjusted by means of the arrow
buttons and confirm it by pressing the central button .
Barley
→Offset: 0.0
Gain : 1.000
–
Set
+
On the display the calibration factors Offset (constant
factor, factory setting 0.00) and Gain (proportional factor,
factory setting 1.000) are indicated.
Example:
Barley
→Offset: -0.5
Gain : 1.000
–
Set
+
The reading can be increased or decreased by means
of the arrow buttons

.
NOTICE The calibration of the device
must be prepared carefully. Pay
attention to a homogeneous sample material without dirt and green
grain portions. Do not change the calibration after one measurement
only. Carry out at least three measurements with the HE lite and
calculate the average. C
alculate the average deviation to the
comparative device.
Example:
You obtained the values 15.7 %, 16.0 % and 15.9 % with the same sample. The average
reading is 15.9 %.
The grain dealer measures 15.4 % with his device, which is 0.5 % less.
The HE lite would therefore display 0.5 % too much.
In this case the parameter offset must be set to -0.5 so that also the HE lite indicates
an average reading of 15.4 %.
Control the modification by means of your initial sample.
Change to the next factor Gain by pressing the central button .
Barley
Offset: -0.5
→Gain : 1.000
–
Set
+
The effects of increasing differences with increasing
moisture contents can be corrected by means of the
multiplicative factor gain.
For this purpose at least two samples, if possible, of different moisture contents are
required, since otherwise the effects cannot be determined exactly.

Settings – Instrument options
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Operating instructions HE lite | Revision 10
Since the procedure is complicated (determination of the gain of a straight line) we
recommend to consult the manufacturer before changing the gain!
Change the factor by means of the arrow buttons and terminate the input by pressing
the central button .
Battery
→Offset
Average
↑
Set
↓
Select again Offset and the next product to be changed,
etc.
Contrast
→<----
↑
Set
↓
Select <---- with the arrow buttons
→Barley
Oats
↑
Meas.
↓
and press the central button in order to return to the
main menu.
Settings
→Off
↑
OFF
↓
Now select the menu item Off and switch off by pressing
the central button .
Refill the measuring cell, switch on the device and carry out a test measurement with
the initial sample.
Example:
+
/
-
15.4 %
Barley
<—
Meas.
OFF
The change of the calibration is marked on the display by
a ±sign.
Thus you can see immediately during the measurement,
whether the test is carried out with the original calibration.
We recommend to document the changes of the calibrations, so that you can always
retrace, whether the measurement was carried out before or after a modification (see
example).
Date Product
Result
HE lite
before
Result grain
dealer
Factor Offset
(factory=0)
Factor Gain
(factory=1)
Result
HE lite
afterwards
01.03.2023 Wheat 15.9 15.4 -0.5 1.0 15.4

Settings – Instrument options
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6.5 Reset
→Barley
Oats
↑
Meas.
↓
In order to reset all Offset settings to 0and all Gain
settings to 1(factory setting), select the item Reset at the
end of the product list of the selection menu.
Wheat
→Reset
<----
↑
Set
↓
Press the central button .
Display:
Reset yes/no?
<----
Yes
No
Are you sure that you want to clear all calibration settings
changed by you?
Press Yes

in order to clear all offset values.
Display:
clear ...
Yes
No
The factors of all products are reset to the original setting.
Check the reset by carrying out a measurement. Now no
more ± signs may indicate before the result!
6.6 Average
The HE lite is equipped with an average function, allowing you to calculate automatically
the average of up to six measurements. This function is particularly useful, in case of very
different conditions (close to the forest, bottom of valleys, etc.) in order determine the
average of the moisture reading to be expected. For the setting of the average function
please proceed as follows:
Offset
→Average
Illumination
↑
Set
↓
Select the function Average and confirm by pressing the
central button .
→AV f. Meas. 0
at Display 0
+
Set
–
Two parameters are indicated on the display.
AV f. Meas. means the number of measurements included in the calculation.
Adjustable from 1to 6; factory setting 0, i. e. the average calculation is switched off.

Settings – Instrument options
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Operating instructions HE lite | Revision 10
at Display means the number of measurements of one product which are indicated
simultaneously (adjustable as a function of AV f. Meas.). Figure 1means just the same
indication as it is during the standard measurement, only the last reading and the number
of values included in the average calculation are indicated. Figure 2to 6 means that all
single readings included in the average reading are indicated during the measurement.
In both cases the average reading is indicated in the line before last next to the selected
product.
The following paragraph describes the procedure of the average function and the
simultaneous presentation of 3 measurements:
→AV f. Meas. 3
at Display 0
+
Set
–
Change the AV f. Meas. to 3by means of the left
button

. Confirm it by pressing the central button .
AV f. Meas. 3
→at Display 0
+
Set
–
The arrow moves to the line below to at Display.
AV f. Meas. 3
→at Display 3
+
Set
–
Change at Display to 3 by means of the left button

.
Then confirm by pressing the central button .
Offset
→Average
Illumination
↑
Set
↓
The device returns to the menu Settings.
Contrast
→<----
↑
Set
↓
To move to the main menu, select <---- with the arrow
buttons

.
→Barley
Oats
↑
Meas.
↓
and confirm by pressing the central button . On the
display indicates:
Settings
→Off
↑
OFF
↓
Select the lowest menu item Off and switch off by
pressing the central button .