Lovibond SensoDirect Con200 User manual

GB
SensoDirect Con200
Conductivity/TDS/Salinity Meter
Operating instructions

2
Declaration of CE-Conformity
The manufacturer: Tintometer GmbH
Schleefstraße 8 a
44287 Dortmund
Deutschland
declares that this product
Product name: SensoDirect Con200
with all optional items conforms to the following regulations:
EMC EN 55 022 : 6 / 1993 class B
EN50082-1(EN61000-4-6,
EN 61000-4-4, EN 61000-4-3,
EN 61000-4-2)
The product conforms to the regulations of the
EMC Directive 89/336/EEC and 73/23/EEC.
Dortmund, March 12, 2003
Cay-Peter Voss,
Managing Director

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Table of Contents Page
1. Scope of delivery ...............................................................4
2. System description .............................................................4
3. Connections.......................................................................6
4. Display ..............................................................................6
5. Keypad .............................................................................7
6. Startup...............................................................................7
7. Measurement.....................................................................9
8. Configuration of the unit .................................................10
8.1 ‘Unit’ ..............................................................................10
8.2 ‘Auto Range’ - Automatic range selection ........................10
8.3 Selection of temperature compensation ..........................10
8.4 ‘t.Lin’ – Setting of compensation coefficient ....................11
8.5 ‘t.rEF’ – Selection of temperature unit °C /°F ...................11
8.6 ‘C.tdS’ – Input of TDS factor ...........................................12
8.7 ‘CELL’ – Input of TDS factor..............................................12
8.8 ‘Unit t’ – Selection of temperature unit °C /°F...................12
8.9 ‘Offset’ – Zero point temperature offset ...........................12
8.10 ‘P.oFF’ – ‘Power off’: automatic unit switch-off.................13
9. Calibration of conductivity measurement .........................13
9.1 Restoring the factory calibration setting ...........................15
10. Result memory ................................................................15
10.1 Storing results ..................................................................15
10.2 Displaying stored results...................................................16
10.3 Deleting stored results......................................................16
11. Error messages and troubleshooting.................................17
12. Technical data ..................................................................19
13. Accessories ......................................................................21

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1. Scope of delivery
Standard:
• Lovibond®SensoDirect Con200
• Batteries, 4*AA 1,5 V cells
• Operating instructions
Set:
• Lovibond®Con
• Batteries, 4*AA 1,5 V cells
• 4 pole measuring sensor
• Carrying case
• Operating instructions
2. System description
The Lovibond®Con is a sturdy, water-proof handheld
meter designed for daily measurements in the area of
field or laboratory analysis.
It is used to measure conductivity, total dissolved so-
lids and salinity in surface water and groundwater as
well as in the field of waste water or industrial water
analysis.
The system complies with the requirements in EN
60529 relating to protection class IP67 and water-
proof/dustproof properties.
The permanent protective plating on the unit serves not
just as impact protection but also as a storage compart-
ment for the electrode and as an anti-slip device when
the meter is used in an upright instrument position.
A „Low Bat” indicator in the display shows the user

5
when it is time to change the batteries.
The required temperature compensation for the system
is performed automatically (ATC) following connection
of the temperature sensor (NTC 10 kOhm) that is inte-
grated in the conductivity electrode.
The Min/Max function enables the user to identify mi-
nimum or maximum results and to show these results
on the display.
Temperature compensation during measurement can
be carried out either in non-linear mode in accordance
with EN 27888 or in linear mode. The system is cali-
brated using Lovibond standard solutions.
An internal memory for 20 results is integrated in the
unit as standard. The memory stores location, result
and temperature.
The memory is called up via the display.

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3. Connections
4. Display
Main display: Result or user
prompt
[SAL] Salinity, g/kg
[mg/l] TDS
Total Dissolved Solids
[kOhm] Specific Resistance
(1/conductivity)
kOhm · cm
[mS] Conductivity ms/cm
[µS] Conductivity µS/cm
Secondary
display: Result - temperature or user prompt
[°C/°F] Temperature unit
[∆
!
]Warning index - battery
[LIN] Linear temperature compensation
[NLF] Non-linear temperature compensation
[%/K] Unit for temperature compensation coefficient
[1/cm] Unit for cell constant correction
[MAX/MIN/
HOLD] show whether maximum, minimum or Hold value is
shown
Conductivity measuring cell

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5. Operation
6. Startup
The unit is supplied with integrated batteries as stan-
dard and is therefore ready for immediate use.
You have to unscrew the unit to insert or change the
batteries.
[Meas] Continuous measurement,
(standard setting)
[Hold] Retain of current result
[On/Off] On/Off
[ ] [ ] Leaf through menu or
memory or show maximum [ ]
or minimum [ ] value
[Cal] Calibration mode
[Rcl] Display of stored results
[Store] Storage of current result or acceptance of
unit configuration
[Menu] Unit configuration

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When inserting the batteries, ensure correct polarity!
Screw the unit back together carefully without exerting
too much pressure on the gasket seal.
If the [∆
!
] symbol appears together with „bAt” in the
lower section of the display, this means that the bat-
teries are nearly empty and need replacing.
However, the unit will continue to function for a certain
period of time.
If „bAt“ appears in the upper section of the display, this
means that the batteries are completely empty.
Only use the matching Lovibond conductivity elec-
trodes!
Other electrodes may cause serious damage to the
meter and the electrode.
Switch off the unit before changing electrodes. Plug in
the electrode before switching the unit back on.
The unit is factory-calibrated to the supplied electrode.
If the electrode is replaced, the unit must be factory-
calibrated.
The electrode must be plugged in before the unit is
switched on.
Switch the unit on via the [ON/OFF] key.
Following measurement, please switch the unit off
using the [ON/OFF] key.

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7. Measurement
Measuring mode MEAS
After the unit is switched on, it is automatically in the
standard measuring mode MEAS.
You can “freeze” the result shown in the display by
pressing the [Hold] key.
If you press the [Hold] key once again, the meter swit-
ches back to the continuous measuring mode.
Four display modes are supported:
Conductivity (units – mS/cm
and µS/cm)
Resistance (unit – kOhm · cm)
Salinity (unit – g/kg)
Total dissolved solids (TDS) (unit – mg/l)
The conductivity mode supports 4 different measuring
ranges:
0,0 ... 200,0 µS/cm
0 ... 2000 µS/cm
0,00 ... 20,00 mS/cm
0,0 ... 200,0 mS/cm
When the Auto Range feature is active, the meter
automatically selects the most suitable resolution.
When the Auto Range feature is inactive, you can
change to the next measuring range resolution by
briefly pressing the [Meas] key. If the highest resolution
is active when you press the key, the unit switches to
the lowest measuring range resolution.

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8. Configuration of the unit
To configure the unit, press the [Menu] key.
The first menu item appears.
If you press the [Menu] key again, the display jumps
to the next menu item.
You can set the various parameters using the [ ] [ ]
keys.
Press the [Store] key to store and conclude configu-
ration.
The unit then switches back to measuring mode.
You can terminate the configuration process by pres-
sing the [Meas] or [Hold] key.
Settings made up to this point are not stored.
The unit retains the previous settings.
8.1 ‘Unit’: Selection of the display
mode
SAL: Salinity
mg/l: TDS
kOhm: Specific Resistance
mS/µS: Conductivity
8.2 ‘Auto Range’: automatic range
selection in Conductivity measuring
mode
off: the range is entered manually ([ ] or [ ] keys )
on: the most suitable range is automatically set by
the unit
+
µS
kOhm mS
SAL mg/l