Pfeuffer HOH-EXPRESS HE 50 User manual

Artikelnummer Betriebsanleitung:
1150 0051
Article no. operating instructions:
Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Phone: [phone]
Fax: [phone]
[e-mail] Revision 7/17.11.2020
www.pfeuffer.com Translation of the original operating instructions
Operating instructions
Electronic moisture meter HOH-EXPRESS
HE 50
for cereals, oil seeds and legumes

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)
2 | 26 Operating instructions HE 50 | Revision 7
These operating instructions form part of the moisture meter HE 50 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
Revision 7 | Operating instructions HE 50 3 | 26
1Introduction........................................................................................................4
Designated use.................................................................................................4
EU Declaration of Conformity ..........................................................................5
Structural features of the danger notes ..........................................................6
Pictograms in the operating instructions.........................................................7
Identification....................................................................................................7
2Safety.................................................................................................................. 8
Obligations on the owner ................................................................................8
General safety notes........................................................................................8
3Technical data..................................................................................................... 9
Dimensions ......................................................................................................9
Weight..............................................................................................................9
Power supply ...................................................................................................9
General data ....................................................................................................9
4Delivery, transport and storage ........................................................................ 10
Scope of delivery............................................................................................10
Transport and packaging................................................................................11
Intermediate storage .....................................................................................11
Return transport ............................................................................................11
5Operation ......................................................................................................... 12
Overview ........................................................................................................12
Preparation of a sample.................................................................................13
Filling the measurement cell and crushing ....................................................14
Measuring procedure ....................................................................................15
5.4.1 Moist products ...................................................................................17
5.4.2 Oily products.......................................................................................17
5.4.3 Tough products...................................................................................17
5.4.4 Finely grained products ......................................................................17
5.4.5 Hops....................................................................................................18
5.4.6 Coarsely grained special products ......................................................19
6Cleaning and maintenance................................................................................ 20
Cleaning .........................................................................................................20
6.1.1 Measurement cell...............................................................................20
6.1.2 Threads and contact surfaces of the measurement cell ....................21
6.1.3 Measurement device..........................................................................21
Maintenance..................................................................................................22
Electrical power supply and battery change..................................................23
7Malfunctions – causes and rectification ............................................................ 24
8Supplements and accessories............................................................................ 25
9Disposal ............................................................................................................ 26

Introduction
4 | 26 Operating instructions HE 50 | Revision 7
1Introduction
Designated use
The HE 50 is a versatile and precise moisture meter for use in agriculture. It is used for
measuring the moisture content of cereals, milled products, oil seeds and legumes.
Products such as spelt, triticale, soy meal and beans can be replaced by other products
such as timothy grass, linseed, etc.
The sample to be investigated is crushed in the measurement cell by screwing it
together, then homogeneously mixed and compressed.
The HE 50 is designed as a portable device to be operated by batteries.
The HE 50 is not intended for private use.
NOTICE The HE 50 is exclusively intended for the aforementioned purpose.
Any other use beyond this definition or conversion of the HE 50
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.
Measuring fluids is prohibited.
The samples to be used for intended operation of the HE 50 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
Revision 7 | Operating instructions HE 50 5 | 26
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
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Person authorized to compile the technical documents: Lothar Pfeuffer,
General Manager
Product: Moisture meter HOH-EXPRESS HE 50
Serial no. _______________________________
The aforementioned product complies with the requirements of the following
harmonized standards:
Standard
Title
DIN EN 61326-1:2013
Electrical equipment for measurement, control and
laboratory use – EMC requirements – Part 1: general
requirements
DIN EN IEC 63000:2019
Technical documentation for the assessment of
electrical and electronic products with respect to the
restriction of hazardous substances
Any modification to the HE 50 not agreed with us shall result in this declaration losing
its validity.
Kitzingen, ___________________ ________________________________
Lothar Pfeuffer, General Manager

Introduction
6 | 26 Operating instructions HE 50 | Revision 7
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.
NOTICE This is a warning about harmful situations for the product and/or
environment.

Introduction
Revision 7 | Operating instructions HE 50 7 | 26
Pictograms in the operating instructions
Information of particular importance and/or
additional information
Comply with the operating instructions
Warning
Warning of electrical voltage
Warning of corrosive substances
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 on the right-hand side of the housing of the
measurement instrument.
It is important to state the type designation and serial number with all queries. Only in
this way will rapid processing be possible.
Sample Pfeuffer GmbH type plate:
Pfeuffer GmbH
Flugplatzstraße 70
97318 Kitzingen
Moisture meter HE 50
S/N 0000 0000
Batterie/Battery 9 V
Made in Germany

Safety
8 | 26 Operating instructions HE 50 | Revision 7
2Safety
NOTICE 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 HE 50 to become damp during transport, storage, cleaning and
operation.
Only use the HE 50 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
Revision 7 | Operating instructions HE 50 9 | 26
3Technical data
HOH EXPRESS HE 50
Moisture meter
Products
Cereal, maize, leguminous crops, oil seeds
Parameters
Moisture
Measuring time
approx. 7 seconds
Dimensions
Measurement instrument:
Height
50 mm
Height with measurement cell
in place
130 mm
Width
120 mm
Length
220 mm
Case:
Height
90 mm
Width
290 mm
Length
390 mm
Weight
Measurement device
approx. 730 g
Measurement device incl.
measurement cell
approx. 1.7 kg
Case, empty
approx. 1.1 kg
Overall weight with accessories
approx. 3.2 kg
Power supply
Battery or rechargeable battery
9 V block battery
General data
Ambient temperature
for storage and transport
-10 °C to +60 °C
Ambient temperature
for measurement
+5 °C to +40 °C
Atmospheric humidity
20 % to 80 % non-condensing

Delivery, transport and storage
10 | 26 Operating instructions HE 50 | Revision 7
4Delivery, transport and storage
Scope of delivery
Figure 1: Scope of supply HE 50
The standard scope of delivery to the owner comprises:
Item
Designation
1
Electronic measurement device
2
Measurement cell with integrated temperature sensor
3
Ratchet (for screwing in the measurement cell)
4
2 measurement cups (11 ml)
5
Cleaning screw
6
Cleaning brushes (2x hard and 1x soft)
7
Hand brush
8
Plastic case
not illustr.
Operating instructions
For the particular article numbers, refer to chapter 8.
1
2
3
4
5
6
7
8

Delivery, transport and storage
Revision 7 | Operating instructions HE 50 11 | 26
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 HE 50 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
6
7
8
Item
Designation
1
Ratchet
2
Measurement cell top part
3
Measurement cell bottom part
4
Measurement device
5
Guide pin
6
LC display
7
Measurement key
8
Product selection dial switch
NOTICE Protect the HE 50 against direct sunlight and extreme temperatures
in excess of +50 °C!
Under extreme temperature conditions, the LC display on the
measurement device may appear darker, making it more difficult to
read off the values. This does not mean the display is broken! It will
regenerate itself under normal temperatures (+5 °C to +40 °C).
Figure
2: Overview

Operation
Revision 7 | Operating instructions HE 50 13 | 26
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
+5 °C to +40 °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.
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 (corresponding to the size of the
supplied measurement cup).

Operation
14 | 26 Operating instructions HE 50 | Revision 7
Filling the measurement cell and crushing
1 2
4
3
4
5
6
Item
Designation
Item
Designation
1
Ratchet
4
Stop pin
2
Measurement cell top part
5
Spindle
3
Milling disk
6
Measurement cell bottom part
Fill the measurement cup with the product so it is level with the rim.
Insert the supplied ratchet into the top part of the measurement cell until it engages.
Screw the measurement cell top part on anticlockwise and put it down.
Remove the plastic disk (protection against contact for the milling disks).
Empty the content of the measurement cup evenly into the bottom part of the
measurement cell.
Put the top part on.
Change over the ratchet and turn the measurement cell clockwise as far as the stop.
Tip: Tip the measurement cell to the side if the milling disk touches
the product. Screw in the measurement cell with short movements
of the ratchet.
Figure
3: Filling the measurement cell

Operation
Revision 7 | Operating instructions HE 50 15 | 26
NOTICE Only close the measurement cell once as far as the stop.
Turning to and fro several times is not required, and can impair the
measurement result.
Exception: Tough products, see chapter 5.4.3.
Figure 4: Put on the measurement cell
Insert the measurement cell into the
holding device on the measurement
device so the handle is pointing to
the right.
The pins on the measurement device
like the hole in the handle of the
measurement cell are used for
guidance.
Item
Designation
1
Guide pin for putting on the measurement cell
2
The contact pins for the measurement cell
3
Correct position of the measurement cell handle pointing to the right
4
Hole in the handle
Measuring procedure
Use the dial switch to select the required product, e.g. wheat.
Press the measurement key to switch the HE 50 on and start the measurement
procedure.
Display shows:
* HE 50 *
Shortly after that, the selected product is displayed:
Wheat
1
3
2
4
1
1

Operation
16 | 26 Operating instructions HE 50 | Revision 7
After approx. 7 seconds, the result is shown with the first two letters of the product:
Wh 14.5%
Turning the dial switch causes another measurement to be
performed immediately thereafter.
Pressing the measurement key several times can produce a slightly
different result, because the calibration is configured for an individual
measurement.
Change the ratchet position to open the measurement cell.
Hold the measurement cell at the side and unscrew the top part by making short
movements with the ratchet.
NOTICE
Remove moist milled material from the measurement cell
immediately after performing the measurement!
Clean the measurement cell and the spindle after each measurement,
see chapter 6.1.
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. Place the plastic disk supplied with the product around the spindle
as protection.
Figure 5: Protection against touching the milling disks
1
2
3
Item
Designation
1
Measurement cell top part
2
Plastic disk
3
Measurement cell bottom part

Operation
Revision 7 | Operating instructions HE 50 17 | 26
5.4.1 Moist products
Fill a heaped measurement cup with the moist product (e.g. freshly harvested
maize, approx. 9 g) and distribute the content in the bottom part of the measure-
ment cell.
Screw the measurement cell together, open it, empty and clean it.
Fill the measurement cell again and carry out a measurement.
This procedure increases the measurement accuracy for moist
products.
When changing from a moist product to a very dry product, it is also
recommended that this »dummy test« should be performed.
5.4.2 Oily products
When measuring moist rape seed and moist sunflower seeds, it is possible that the
milling disks might touch one another when being screwed together.
Display shows:
range
Repeat the measurement.
With rape seed, fill a heaped measurement cup, and with sunflower seeds, fill
two measurement cups up to the level of the brim.
The measurement result is not falsified in this case!
5.4.3 Tough products
To fill the measurement cell, use one well filled measurement cup.
Particularly with peas and beans in the tough condition (17 % - 20 % moisture
content), it is recommended that you should only screw the measurement cell
partially together and then open it again.
Repeat this procedure two or three times until the measurement cell can be screwed
together as far as the stop.
5.4.4 Finely grained products
When measuring finely grained products (e.g. meal, semolina, flour and grass seeds) it
is possible for the milling disks to touch one another when being screwed together.
Display shows:
range

Operation
18 | 26 Operating instructions HE 50 | Revision 7
Repeat the measurement.
With meal and semolina, use a heaped measurement cup, and with flour and
grass seeds, use two heaped measurement cups.
Tamp the product in the measurement cup (up to 10 times) and refill it before
you distribute the content in the measurement cell.
The measurement result is not falsified in this case!
For measuring flour, a special flour measurement cell with smooth
milling disks is available as an accessory.
To fill the flour measurement cell, use one well filled measure-ment
cup.
If you frequently measure finely grained products, we recommend
using a funnel.
The particular article numbers can be found in chapter 8.
5.4.5 Hops
Hops can only be measured using the flour measurement cell available as an accessory.
Fill the measurement cup (0.02 l) well with compressed hop cones so the hops
still spring back under finger pressure.
Place the funnel on the measurement cell bottom part and fill in the hops.
Turn the funnel and distribute the hops evenly in the bottom part of the
measurement cell.
Remove the funnel and turn the measurement cell top part by hand.
Set the dial switch to the required hop program, e.g. "hops 1" and perform the
measurement.
NOTICE A sticky resin (lupulin) is created when hops are milled.
Thoroughly clean the milling disks of the measurement cell after
each investigation, using cleaning fluid or spirit.

Operation
Revision 7 | Operating instructions HE 50 19 | 26
There are various programs for hops, because hop varieties differ in
their acid content.
The program selection should be defined with Pfeuffer GmbH before
you order the HE 50.
Program selection
Program
Variety, e.g.
Hops 1
Tettnanger, Tettnanger Hallertauer, Brewers Gold, Perle
Hops 2
Northern Brewer, Hallertauer Magnum, Taurus
Hops 3
Hallertauer Tradition, Hallertauer mittelfrueh, Saphir
Hops 4
Herbrucker spaet, Spalter Select
Hops 5
Hercules
Hop pellets
Hop pellets will have to be granulated with an electric granulator before the
measurement, for example.
Granulate the hop pellets at the highest setting for approx. 20 seconds.
Allow the mass to cool down.
Fill a measurement cup with the granulated hop pellets.
Tamp the product in the measurement cup (up to 10 times) and fill it up again
until the cup is filled to the brim.
Place the funnel on the measurement cell bottom part and fill in the hop pellets.
Turn the funnel and distribute the hop pellets evenly in the measurement cell
bottom part.
Take the funnel off and turn the measurement cell top part as far as the stop
using the ratchet.
Set the dial switch to "hop pellets" and carry out the measurement.
5.4.6 Coarsely grained special products
With coarsely grained products (e.g. hazel nut kernels) it is recommended that you
should crush the product in advance using a hammer, chopping knife or the like.
Fill the measurement cell with two measurement cups full up to the brim.
Proceed with the rest of the measurement as for cereals.

Cleaning and maintenance
20 | 26 Operating instructions HE 50 | Revision 7
6Cleaning and maintenance
NOTICE Opening the housing and inappropriate operation will invalidate the
warranty.
To ensure trouble-free operation, it is essential for the HE 50 to be
cleaned and maintained at regular intervals.
Cleaning
NOTICE 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
6.1.1 Measurement cell
Measure
Interval
Clean the top part of the measurement cell with the hand brush.
When brushing, make sure that the milling disk is pointing downwards,
to prevent any dirt getting into the threads.
AEM
Clean the bottom part of the measurement cell with the hard or soft
brush, depending on the moisture and degree of gumming.
AEM
With very moist, oily and sticky products, it is recommended that you
mill a dry sample of cereal (approx. 14 % moisture content) in the
measurement cell as a cleaning measure.
Residues will be bound up with the meal and can be removed easily.
NOTICE
Do not empty the measurement cell top part or bottom part by
knocking it out!
This can lead to damage to the measurement cell.