VWR 304 Series User manual

EN
304 series
Handheld conductivity measuring device
Quick reference guide
European catalogue number:
EU connection: 663-0348 HCO 304, 663-0349 LCO 304
Version: 1.0
Issued: 15.01.2019

Table of contents 304 series
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Table of contents
1 Legal address of the manufacturer ............................................ 19
2 About this documentation........................................................... 20
2.1 Purpose of the document................................................................20
2.2 Warranty .........................................................................................20
2.3 Compliance with local laws and other legal regulations..................20
2.4 Further information..........................................................................20
3 Safety............................................................................................. 22
3.1 Explanation of safety symbols ........................................................22
3.2 Foreseeable misuse........................................................................22
3.3 Safety instructions...........................................................................23
3.4 Intended use ...................................................................................23
4 The product at a glance ............................................................... 25
4.1 304 series .......................................................................................25
4.2 Display elements.............................................................................25
4.3 Operating elements.........................................................................25
5 Bases for measurement............................................................... 27
6 Maintenance.................................................................................. 27
6.1 Operating and maintenance notices ...............................................27
6.2 Battery.............................................................................................27
6.2.1 Battery indicator..............................................................................27
6.2.2 Changing battery.............................................................................28
7 Operation ...................................................................................... 29
8 Error and system messages ....................................................... 31
9 Service........................................................................................... 32
9.1 Online resources.............................................................................32

304 series Legal address of the manufacturer | 1
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1 Legal address of the manufacturer
VWR International bvba
Researchpark Haasrode 2020
Geldenaaksebaan 464
B-3001 Leuven
Phone: + 32 16 385011
http://be.vwr.com

2 | About this documentation 304 series
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2 About this documentation
2.1 Purpose of the document
– This document is intended as a quick reference option.
– It does not replace the operating manual.
– For this reason, read the operating manual before operating the product for the
first time.
2.2 Warranty
VWR guarantees that this product will remain free from material and production de-
fects for a period of two (2) years from the time of delivery. If there is a defect, VWR
shall decide on its own discretion whether to repair or replace the product free of
charge or to provide the customer with a refund of the purchase price of the product,
insofar as it is sent back during the warranty period. This warranty shall be voided if
the product was damaged accidentally or intentionally due to improper use or nor-
mal wear. Insofar as the necessary maintenance tasks and inspections are not car-
ried out in accordance with the operating manual and the local requirements, the
warranty shall be voided, unless this omission is not causal for the defects of the
product.
The customer must insure returned articles against damage and loss. This warranty
is limited to the aforementioned rights. IT IS EXPRESSLY AGREED THAT THIS
WARRANTY APPLIES INSTEAD OF ANY WARRANTY OF FITNESS AND IN-
STEAD OF WARRANTY OF GENERAL MERCHANTABILITY.
2.3 Compliance with local laws and other legal regulations
The customer is responsible for obtaining the necessary official approvals and other
authorisations that are necessary for operation and use of the purchased product in
its place of use. VWR can only be held liable if the customer fails to carry out the ne-
cessary activities for this purpose or authorisations are not issued unless a corres-
ponding rejection is based on a defect of the product.
2.4 Further information
Software version of the product:
– V1.3 or later
Link to the complete operating manual
htttp://www.vwr.com
http://www.conrad.com/downloads

304 series About this documentation | 2
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For the exact product name, refer to the type plate on the rear side of the product.
NOTE
For information about the software version, press and hold the ON button to switch
on the product for longer than 5 seconds. The series is shown in the main display
and the software version of the product is shown in the secondary display.

3 | Safety 304 series
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3 Safety
3.1 Explanation of safety symbols
DANGER
This symbol warns of imminent danger which can result in death, severe bodily in-
jury, or severe property damage in case of non-observance.
CAUTION
This symbol warns of potential dangers or harmful situations which can cause dam-
age to the device or to the environment in case of non-observance.
NOTE
This symbol indicates processes which can have a direct influence on operation or
can trigger an unforeseen reaction in case of non-observance.
3.2 Foreseeable misuse
The fault-free function and operational safety of the product can only be guaranteed
if generally applicable safety precautions and the device-specific safety instructions
for this document are observed.
If these notices are disregarded, personal injury or death, as well as property dam-
age can occur.
DANGER
Incorrect area of application!
In order to prevent erratic behaviour of the product, personal injury or property dam-
age, the product must be used exclusively as described in the chapter Description in
the operating manual.
– Do not use in safety / Emergency Stop devices!
– The product is not suitable for use in explosion-prone areas!
– The product must not be used for diagnostic or other medical purposes on pa-
tients!
– The product is not intended to come into direct contact with food. For measure-
ment in foods, samples must be taken and discarded after the measurement!

304 series Safety | 3
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3.3 Safety instructions
This product has been designed and tested according to the safety requirements for
electronic measuring devices.
CAUTION
Erratic behaviour!
On suspicion that the product can no longer be operated without danger, it must be
decommissioned and prevented from recommissioning with appropriate labelling.
The safety of the user can be impaired by the device if, for example, if it shows vis-
ible damage, it no longer works as specified or if it was stored for an extended
period of time under unsuitable conditions.
– Visual inspection!
– In case of doubt, send the product to the manufacturer for repair or mainten-
ance!
NOTE
If the product is stored at a temperature above 50 °C, or is not used for an extended
period of time, the batteries must be removed. Leaks from the batteries are avoided
as a result.
NOTE
This product does not belong in children's hands!
3.4 Intended use
The product is designed for measuring the conductivity in liquids. The measuring
cell is connected permanently.

3 | Safety 304 series
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Measuring
range
HCO304 LCO304
Conductivity 0 .. 2000 µS/cm
0.00 .. 20.00 mS/cm
0.0 .. 100.0 mS/cm
-
-
-
Specific resist-
ance
0.000 .. 2.000 µS/cm
0.00 .. 20.00 µS/cm
0.0 .. 100.0 µS/cm
10.0 .. 200.0 kΩ/cm
0.010 .. 2.000 MΩ/cm
0.01 .. 20.00 MΩ/cm
Salinity 0.0 .. 50.0 g/kg -
TDS 0 .. 2000 mg/l -
Temperature -5.0 .. +100.0 °C (23.0 .. +212.0 °F) – the con-
ductivity measuring cells can be exposed tempor-
arily to temperatures of up to 100 °C and perman-
ently to temperatures of up to 80 °C.
Operating conditions -20 to 50 °C; 0 to 95 % r.h. (temporarily 100 %
r.h.)
Storage temperature -20 to 70 °C
Protection rating IP65 / IP67

304 series The product at a glance | 4
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4 The product at a glance
4.1 304 series
LCD Display HCO304 LCO304 HCO304 LCO304
4.2 Display elements
Display
Battery indicator Evaluation of the battery status
Unit display Display of units, if applicable, with unstable sym-
bol or type of mode, min/max/hold
Main display Measurement of the current conductivity value or
value for min/max/hold
Auxiliary display Corresponding temperature value for the value
shown in the main display. If applicable, alternat-
ing with the temperature compensation.
4.3 Operating elements
On / Off button
Press briefly Switch on the product
Activate / deactivate lighting
Long press Switch off the product
Reject changes in a menu

4 | The product at a glance 304 series
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Up / Down button
Press briefly Display of the min/max value
Change value of the selected parameter
Long press Reset the min/max value of the current measure-
ment
Both simultaneously Rotate display, overhead display
Function key
Press briefly Freeze measurement
Return to measurement display
Call up next parameter
Long press, 2s Open menu, frozen measurement is displayed
Close menu, changes are saved

304 series Bases for measurement | 5
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5 Bases for measurement
For additional information, refer to the operating manual!
6 Maintenance
6.1 Operating and maintenance notices
NOTE
The product and conductivity measuring cell must be handled with care and used in
accordance with the technical data. Do not throw or strike.
NOTE
If the product is stored at a temperature above 50 °C, or is not used for an extended
period of time, the batteries must be removed. Leaks from the batteries are avoided
as a result.
NOTE
If the product is stored at a temperature above 50 °C, or is not used for an extended
period of time, the batteries must be removed. Leaks from the batteries are avoided
as a result.
The device is calibrated at the factory with the permanently connected conductivity
measuring cell. The highest system precision can be achieved in this manner. If de-
sired, a gradient correction can be carried out for the product in order to further op-
timise the accuracy in a narrow range. This is only necessary for normal use. See
Adjustment of the measuring input.
6.2 Battery
6.2.1 Battery indicator
For additional information, refer to the operating manual!

6 | Bases for measurement 304 series
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6.2.2 Changing battery
Only use new, high-quality and suitable alkaline batteries!
For additional information, refer to the operating manual!

304 series Operation | 7
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7 Operation
Parameter Values Meaning
Input
INP
(OND Measured variable - conductivity
RES Measured variable - specific resistance
SAL Measured variable - salt content / salinity
TDS Measured variable - total dissolved solids
Factor for TDS
CTDS
0.40 .. 1.00 Conversion factor for TDS measurement
Temperature compensation
TCOR
OFF Do not compensate conductivity measurement
NLF Non-linear function for natural water in accord-
ance with EN 27888 (ISO 7888) Ground water,
surface water or drinking water
NACI Compensation of weak NaCI solutions only in
pure and ultrapure water
L,N Linear temperature compensation
Compensation coefficient
TL,N
0.300 .. 3.000 Temperature compensation coefficient in %/K
Reference temperature for temperature compensation

7 | Operation 304 series
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TREF
25 °(Reference temperature 25 °C or 77 °F
20 °(Reference temperature 20 °C or 68 °F
Shut-off time
POFF
OFF No automatic shut-off
15 30 60 120 240 Automatic shut-off after a selected time in
minutes, during which no buttons have been
pressed
Backlighting
L,TE
OFF Backlighting deactivated
15 30 60 120 240 Automatic shut-off of the backlighting after a se-
lected time in seconds, during which no buttons
have been pressed
ON No automatic shut-off of the backlighting
Temperature unit
UN,T
°(Temperature display in °C
°FTemperature display in °F
Factory settings
IN,T
NO Use current configuration
YES Reset product to factory settings. IN,T DONE ap-
pears in the display

304 series Error and system messages | 8
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8 Error and system messages
Display Meaning Possible causes Remedy
---- Range switching or
measured value un-
stable
Measurement far
outside of the
measuring range
Measuring cell de-
fect
Contamination or
air bubbles
Wait for the transient effect
of the controller
Measurement leaves the
permissible range
Send in for repair
No display,
unclear
characters
or no re-
sponse
when but-
tons are
pressed
Battery depleted
System error
Product is defective
Battery depleted
Error in the product
Product is defective
Replace battery
Send in for repair
BAT Battery depleted Battery depleted Replace battery
ERR.1 Measuring range
exceeded
Measurement too
high
Measuring cell de-
fect
The measurement is above
the permissible range
Check the measuring cell
Send in for repair
ERR.2 Measuring range is
undercut
Measurement too
low
Measuring cell de-
fect
The measurement is below
the permissible range
Check the measuring cell
Send in for repair
SYS ERR System error Error in the product Switch product on/off
Replace batteries
Send in for repair

9 | Service 304 series
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9 Service
9.1 Online resources
The following information is provided on the VWR website at www.vwr.com:
– All contact information of the technical customer service
– VWR online catalogue and information about accessories and compatible
products
– Additional product information and special offers
Contact If you require information or technical support, please contact your VWR
sales centre or visit our website: www.vwr.com.