Pfeuffer HE lite User manual

Artikelnummer/Article number: 1170 0071
Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Phone [phone]
Fax [phone]
Internet: http://www.pfeuffer.com Revision 9/08.06.2017
Email: [email protected] Translation of the original operating instructions
Operating Instructions
for the grain moisture meter

Operating instructions HE lite
Page 2 of 28 Revision 9 © 2017 – Pfeuffer GmbH
Document history
Date
Revision
Remark
Name
21.07.2014
8
Revisions
MF
08.06.2017
9
Declaration of conformity updated
MF
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, 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.
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: [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)

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 3 of 28
1Contents
1Contents ...........................................................................................................................3
2Introduction ......................................................................................................................4
2.1 General / Mode of operation .........................................................................................4
2.2 Notice – for use only as directed....................................................................................4
3Safety................................................................................................................................4
3.1 Symbol and notice explanation......................................................................................4
3.2 Operator-safety instructions..........................................................................................4
3.3 Working with electric components ................................................................................5
4Packing, transport .............................................................................................................5
4.1 Transport and storage....................................................................................................5
4.2 Equipment supplied .......................................................................................................6
4.3 Environmental conditions .............................................................................................. 6
4.4 Connections/Power supply ............................................................................................ 6
5Operation/Use ..................................................................................................................7
5.1 General/Operational control/Display/Notice: ...............................................................7
6Moisture measurement.....................................................................................................7
6.1 Filling the measuring cell and grinding...........................................................................7
6.2 Measurement ................................................................................................................9
6.3 Cleaning the measuring cell ......................................................................................... 10
6.4 Automatic temperature correction..............................................................................11
6.5 Maize, especially humid maize, e. g. freshly harvested maize .....................................11
6.6 Sunflower seeds...........................................................................................................11
7Settings/Instrument options............................................................................................12
7.1 Battery and Version .....................................................................................................13
7.2 Offset ...........................................................................................................................14
7.3 Code entering ..............................................................................................................14
7.4 Setting of the products ................................................................................................ 15
7.5 Reset ............................................................................................................................18
7.6 Average ........................................................................................................................19
7.7 Illumination ..................................................................................................................22
7.8 Contrast .......................................................................................................................23
7.9 Reset brightness and contrast...................................................................................... 25
8Trouble shooting .............................................................................................................25
8.1 Fault finding – What to do, if?......................................................................................25
9Cleaning and maintenance ..............................................................................................26
9.1 Cleaning advices...........................................................................................................26
9.2 Maintenance ................................................................................................................26
10 Spare parts and service ...................................................................................................26
10.1 Spare parts...................................................................................................................26
10.2 Customer Service .........................................................................................................27
11 Technical data .................................................................................................................27
11.1 Ratings (please enter data): ......................................................................................... 27
11.2 Instrument data ...........................................................................................................27
11.3 CE-marking...................................................................................................................27
EC-Declaration of Conformity....................................................................................................28

Operating instructions HE lite
Page 4 of 28 Revision 9 © 2017 – Pfeuffer GmbH
2Introduction
2.1 General / Mode of operation
The HE lite continues the thousandfold approved technique of its predecessor model HE 50,
which has worked satisfactorily as versatile and precise instrument 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.
2.2 Notice – for use only as directed
It is not allowed to measure respectively grind solid and substantial matters made of metal,
stone, concrete, liquids or other foreign components. This leads to a destruction of the
instrument.Unauthorized modifications are not allowed. Attention must be paid to the
indications of these operating instructions regarding operation and maintenance.
Any application other than that stated herein is forbidden. The manufacturer assumes no
liability for damage caused by incorrect or unauthorized use. Any damage or risk caused by
improper use is the responsibility of the operator. Before using the HE lite for applications
outside the guidelines contained herein contact the customer service department of
Pfeuffer GmbH, Kitzingen.
3Safety
3.1 Symbol and notice explanation
3.1.1 Operator safety instructions:
You 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.
3.1.2 Attention symbol
Attention! You find »Attention!« at points in these operating instructions, which must be
complied with particularly in order to maintain the directives, rules, notices
and correct operation and to prevent damage or destruction of the
instrument.
3.2 Operator-safety instructions
The HE lite 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

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 5 of 28
safety precautions of the instrument serve for accident prevention, i. e. the protection of the
operating and maintenance personnel and for the instrument itself.
The following notices regarding operator safety must be particularly considered:
•Each person, who is concerned with mounting, dismounting, remounting,
commissioning, operation and maintenance (inspection, maintenance and overhaul) of
the HE lite 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 HE lite only in perfect condition.
•The operator of the HE lite is responsible that the safety devices are not changed, that
they are working and that they are not blocked.
•After repair works it is necessary to check whether all protection devices have been fixed
before using the instrument.
•The local rules for safety and accident prevention must be considered in every case
during operation.
3.3 Working with electric components
The opening of the housing as well as all repair and maintenance works
regarding electric components 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. The warranty expires when opening the housing and in case of
the guarantee expires by the opening of the housing and in case of
improper handling.
4Packing, transport
4.1 Transport and storage
4.1.1 Notices and protective measures for the transport
•To be despatched with supplied original packing only
•To be treated with usual care
•To be kept dry inside original packing
•Not to be kept outside
•Don’t put any heavy items on the packing
4.1.2 Information regarding damages in transit
Damages in transit must be reported and documented in written form (preferably by means
of a picture).
4.1.3 Checks during the acceptance through the consignee:
Are there any loose parts inside the housing? (shaking test)
Are there any scratches or dents on the housing??

Operating instructions HE lite
Page 6 of 28 Revision 9 © 2017 – Pfeuffer GmbH






4.2 Equipment supplied
Check the equipment supplied with regard to completeness. Compare the following list to
the delivered parts. If something is not clear look up the delivery note first. It contains all
parts delivered by us. Missing parts must be reported to us immediately in written form.
Description
Quantity

Plastic housing with integrated
electronic measuring device and bottom
unit of the measuring cell
1 piece

Top unit of the measuring cell with
11 ml filling measure
1 piece

Brush for cleaning
1 piece

Cleaning paintbrush
2 pieces

Batteries 1.5 V (round cell, size AA)
3 pieces

Carrying case with foam insert
1 piece
For further spare parts and accessories please refer to chapter 10.1.
4.3 Environmental conditions
Attention! Protect the HE lite against direct sunshine and
extreme temperatures!
4.4 Connections/Power supply
The power is supplied by three 1.5 V batteries (round cells
size AA) commercially available. The battery voltage must be
> 3.3 V. Otherwise the HE lite switches off automatically! A
faulty measuring due to low battery is not possible. By
means of the option »battery« (refer to chapter 7.1) the
supply voltage can be checked. Prior to the measurement
the warning notice »Bat < 3.3 V« appears on the display.
The old battery then has to be replaced by a new one. For this purpose the battery box must
be opened at the bottom surface.
Pay attention to the »+« and »–« marking when replacing the batteries. Bend the nozzle of
the cover forwards after closing the battery box, until it locks into place.
Attention! A battery cannot be recharged! This can lead to a dangerous escape of acid.
Battery
change ...
Bat< 3.3V

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 7 of 28
5Operation/Use
5.1 General/Operational control/Display/Notice:
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 keys and the On/Off-button have
additionally the function indicated on the display. The
appropriate function is indicated above each button.
6Moisture measurement
6.1 Filling the measuring cell and grinding
The measuring cell is equipped with
special ribbing allowing the crushing of
grain and oil seeds.
Attention!
Foreign elements, such as small
stones, straw, husks, weed seeds,
green kernels or in case of corn, stalks
should be removed from the sample
prior to the measurement.
Open the top unit of the measuring cell
anticlockwise.
Fill the filling measure (11 ml) inside the
top unit 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.
12.1 %
Wheat
<—
Meas.
OFF

Operating instructions HE lite
Page 8 of 28 Revision 9 © 2017 – Pfeuffer GmbH
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.

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 9 of 28
6.2 Measurement
Switch on HE lite:
Press ON 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.
»Measure …« appears on the display.
Then the display indicates the measured
moisture reading and the previously
selected product. The temperature of the
sample is corrected automatically.
Choose the product by means of the
arrow keys:

If the arrow key is next to the product to
be measured, press the central key
To measure a different product press the
button

(<-), select it by means of the
arrow keys and press the key measure.

marked by »Meas.« in order to start the
measurement .
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.
↓
Measure ...
Wheat
<—
OFF
12.1 %
Wheat
<—
Meas.
OFF

Operating instructions HE lite
Page 10 of 28 Revision 9 © 2017 – Pfeuffer GmbH
To switch off the instrument 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,
appears on the display.
Product and measuring ranges:
Wheat....................9 bis 35 %
Rye.........................9 bis 35 %
Barley ....................7 bis 38 %
Oats .......................8 bis 35 %
Rape ......................4 bis 30 %
Maize.....................8 bis 45 %
Sunflower ..............5 bis 25 %
Triticale..................9 bis 35 %
Open the measuring cell, empty it and
clean it with a paintbrush (see following
picture).
Attention! Moist materials must be removed from the measuring cell immediately after
the measurement!
6.3 Cleaning the measuring cell
To open the measuring cell unscrew the
top unit anticlockwise.
Use the small handbrush to clean the top
unit of the measuring cell. Make sure
that the grinding disc shows downwards
when brushing off, so that no coarse
meal falls into the thread and leads to
dirt accumulations.
12.1 %
Wheat
<—
Meas.
OFF

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 11 of 28
Empty the bottom unit by turning it and
clean it by means of the paintbrushes
with hard or soft bristles depending on
the moisture content or the glueing of
the sample.
Attention!
Do not beat out the lower part!
This can lead to damage the
measuring cell.
Notice:
For moist, oily and sticky samples we
recommend to grind a dry sample
(approx. 14
% moisture) inside the
measuring cell.
Residuals are connected with the coarse
meal and can easily be removed.
6.4 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 instrument 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.
6.5 Maize, especially humid maize, e. g. freshly harvested maize
For maize use a filling measure heaped with kernels. 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.
6.6 Sunflower seeds
When testing sunflower seeds use a slightly heaped filling measure.

Operating instructions HE lite
Page 12 of 28 Revision 9 © 2017 – Pfeuffer GmbH
7Settings/Instrument options
The submenu »Settings« allows the
inquiry and modification of different
parameters. To select the menu, proceed
as follows:
Switch on the instrument.
The display indicates the product list and
the function »Meas.«.
Now the display indicates the menu
items: Battery, Offset und Average.
Change to the appropriate menu items
by pressing:

Select »Settings« by means of the arrow
keys

.
and press .
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 key .
Triticale
→Wheat
Settings
↑
Meas.
↓
Wheat
→Settings
Off
↑
Set
↓
Battery
→Offset
Average
↑
Set
↓

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 13 of 28
7.1 Battery and Version
To measure the battery voltage select
battery and press the central button .
Normal voltage is 4.7-4.5 V, new
batteries have been inserted.
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.
The right key »CRC« allows the user to
inquire the software and calibration
version. To return to the function battery
voltage measurement, press the key
»Bat« by pressing

(<–) you return to
the submenu »Settings«.
(Example)
→Battery
Offset
↑
Set
↓
Battery
4.6 V
<-
Bat
CRC
Version 1.4 Eng
PRG: F8A5
DAT: 9FFE
<-
Set
CRC
Battery
change ...
Bat< 3.3V

Operating instructions HE lite
Page 14 of 28 Revision 9 © 2017 – Pfeuffer GmbH
7.2 Offset
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 instrument offers the possibility to
enter a factor, allowing linearly ascending
corrections.
Select the function »Offset« and then
press the central key »SET«.
and move to the next figure by pressing
Set figure »4« by means of the left arrow
key

:
and move to the next figure by pressing
Enter the figure »3« by means of the left
arrow key

:
7.3 Code entering
A code inquiry prevents unintentional
adjustments of the instrument.
»CODE 001« is indicated on the display.
Enter the figure »2« by means of the left
arrow key

:
Now the correct code »342« appears on
the display and must be confirmed by
pressing
Battery
→Offset
Average
↑
Set
↓
→Code: 002
↑
↑
Set
↓
→Code: 042
↑
↑
Set
↓
→Code: 342
↑
↑
Set
↓

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 15 of 28
7.4 Setting of the products
After entering the code (see chapter 7.3)
the product list is indicated on the
display in the same way as for the
product selection during the measure-
ment:
Select the product to be adjusted by
means of the arrow keys and confirm it
by pressing .
On the display the calibration factors
offset (constant factor, factory setting
»0.00«) and gain (proportional factor,
factory setting »1.000« are indicated.
The readings can be increased or
decreased by means of the arrow keys.

(Example)
Notice:
The calibration of the instrument 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.
Calculate the average deviation to the
comparative instrument.
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 instrument, i. e. 0.5 % less.
This means that the reading of the HE lite
is 0.5 % would be too high.
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 original sample.
Change to the next factor »GAIN« by
pressing .
→Barley
Oats
↑
Set
↓
Barley
→Offset: 0.0
Gain : 1.000
—
Set
+
Barley
→Offset: -0.5
Gain : 1.000
—
Set
+

Operating instructions HE lite
Page 16 of 28 Revision 9 © 2017 – Pfeuffer GmbH
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.
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
keys and terminate the input by pressing:
Select again »Offset« and the next
product to be changed, etc.
»»<----« select with the arrow keys
and press in order to return to the
main menu.
Now select the menu item »Off«:
and switch off by pressing .
Settings
→Off
↑
OFF
↓
Barley
Offset: -0.5
→Gain : 1.000
—
Set
+
Battery
→Offset
Average
↑
Set
↓
Contrast
→<----
↑
Set
↓
→Barley
Oats
↑
Meas.
↓

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 17 of 28
Refill the measuring cell, switch on the
instrument and carry out a test
measurement with the original sample:
(Example)
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.
Notice:
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
01.06.17 Wheat 15,9 15,4 -0,5 1,0 15,4
+
/
-
11.1 %
Barley
<—
Meas.
OFF

Operating instructions HE lite
Page 18 of 28 Revision 9 © 2017 – Pfeuffer GmbH
7.5 Reset
In order to reset all offset settings to »0«
and all gain settings to »1« (factory
setting), select the item »Reset« at the
end of the product list of the selection
menu.
and press the central button .
On the display the following question
appears:
Are you sure that you want to clear all
calibration settings changed by you?
Press »YES«

in order to clear all
offset values.
Then the following message appears on
the display:
The factors of all products are reset to
the original setting.
Check the reset by carrying out a
measurement. Now no more »±« signs
may appear before the result!
Clear ...
Yes
No
→Barley
Oats
↑
Meas.
↓
Wheat
→Reset
<----
↑
Set
↓
Reset yes/no?
<----
Yes
No

Operating instructions HE lite
© 2017 – Pfeuffer GmbH Revision 9 Page 19 of 28
7.6 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:
Select the function Average and confirm
by pressing .
Two parameters are indicated on the
display:
»AV f. Meas« means the number of
measurements included in the calculation
(adjustable from 1 to 6; factory setting
»0«, i.
e. the average calculation is
switched off).
»at
Display« means the number of
measurements of one product which are
indicated simultaneously (adjustable as a
function of »AV f.
Meas«). Figure »1«
means 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 »2« to »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:
Change the »AV f. Meas« to »3« by
means of the left button

.
→AV f. Meas. 0
at Display 0
+
Set
–
Offset
→Average
Illumination
↑
Set
↓
→AV f. Meas. 3
at Display 0
+
Set
–

Operating instructions HE lite
Page 20 of 28 Revision 9 © 2017 – Pfeuffer GmbH
Confirm it by pressing .
The arrow moves to the line below to
»at Display«:
Change »at Display« to »3« by means of
the left button

.
Then confirm by pressing .
The instrument returns to the menu
»settings«.
To move to the main menu, select
»<----«

and confirm by pressing .
On the display appears:
AV f. Meas. 3
→at Display 3
+
Set
–
AV f. Meas. 3
→at Display 0
+
Set
–
Offset
→Averge
Illumination
↑
Set
↓
Contrast
→<----
↑
Set
↓
→Barley
Oats
↑
Meas.
↓