Lovibond SensoDirect pH200 Manual de usuario
SensoDirect pH200
pH-/Redox-/Temperature Meter
Operating instructions
Meas Cal
Hold Rcl Store
On
Off Menu
%
°C
pH
Rel mV
mV
ATC OK CAL
MEAS
HOLD
°F
°C
GB
Declaration of CE-Conformity
The manufacturer: Tintometer GmbH
Schleefstraße 8 a
44287 Dortmund
Deutschland
declares that this product
Product name: SensoDirect pH200
with all optional items conforms to the following regulations:
EMC EN 55 022 : 6 / 1993 class B
EN 50 082-1 (EN 61000-4-6,
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
Table of Contents Page
1. Scope of delivery .............................................................. 4
2. System description ........................................................... 4
3. Connections ..................................................................... 5
4. Display ............................................................................. 7
5. Keypad ............................................................................ 7
6. Start up ............................................................................ 8
7. Measurement ................................................................... 9
8. Configuration of the unit ................................................. 11
8.1 Selection of measuring function [pH] – [mV] – [Rel mV] ... 11
8.2 Calibration: selection of calibration ................................. 12
8.3 Display of electrode status.............................................. 12
8.4 Selection of temperature unit °C /°F ............................... 14
8.5 Power off: automatic unit switch-off ................................ 14
9. Calibration of pH measurement ...................................... 14
9.1 Starting calibration: Press [CAL] key ............................... 16
9.2 Selecting buffer solutions................................................ 16
9.3 Calibration point 1: ‘CAL. 1’ ........................................... 17
9.4 Calibration point 2: ‘CAL. 2’ ........................................... 18
9.5 Calibration point 3: ‘CAL. 3’ ........................................... 20
10. Result memory ............................................................... 21
10.1 Storing results ................................................................ 21
10.2 Displaying stored results ................................................. 21
10.3 Deleting stored results .................................................... 22
11. Error messages and troubleshooting .............................. 22
12. Technical data ................................................................ 25
13. Accessories .................................................................... 27
14. Assembling Carrying strap .............................................. 27
4
1. Scope of delivery
Standard:
• pH Meter
• Batteries, 4 x AA 1,5 V cells
• Operating instructions
• Carrying strap
Set:
• pH Meter
• Batteries, 4 x AA 1,5 V cells
• pH/Temperature sensor
• Standard buffer solutions, each 90 ml pH 4.00/7.00/
10.00
• Carrying case
• Operating instructions
• Carrying strap
2. System description
The system is a sturdy, water-tight handheld meter
designed for daily measurements in the area of field or
laboratory analysis.
It is used to measure redox voltage and temperature
in the field of environmental analysis as well as for ap-
plications in the food and chemical industries.
The system complies with the requirements in EN
60529 relating to protection class IP67 and water-
proof/dustproof properties.
5
The permanent protective plating on the unit serves
not just as impact protection but also as a storage
compartment for the electrode and as an anti-slip de-
vice when the meter is used in an upright position.
Microprocessor technology and 4 x AA 1,5 V batte-
ries allow unit operation without battery change for
15,000 hours or more.
A "Low Bat” indicator in the display shows the user
when it is time to change the batteries.
The required temperature compensation for the sy-
stem is performed automatically (ATC) following con-
nection of a temperature sensor or via manual input
via the touch-sensitive film keypad. The unit automati-
cally identifies Pt1000 and NTC 30 kOhm sensors.
The AUTO HOLD feature enables the user to identify
stable results and call them up on the display.
The MEAS function is the standard continuous measu-
ring mode for pH levels or redox voltages.
pH calibration of the system is via an integrated auto-
matic buffer recognition feature.
The temperature characteristics of the Tintometer stan-
dard buffer solutions and the reference buffer soluti-
ons specified in DIN 19266 are stored in the unit and
are used for automatic calibration of the system when
selected.
It is additionally possible to enter some of the buffer
data into the unit manually.
Calibration is performed optionally at 3 points, 2 points
or 1 point.
A sensor evaluation is automatically shown in the dis-
play (or can be called up via the menu) after each ca-
libration.
6
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.
3. Connections
Temperature sensor “T”, 4mm
1-pin
Temperature sensor “REF”
and separately routed reference
electrode, if present, 4mm 1-pin
pH or redox electrode, HF soc-
ket in acc. with DIN 19262
T REF
%
°C
pH
Real mV
mV
ATC O CAL
MAX
MEAS
MIN
HOLD
°F
°C
MeasCAL
Hold KClStore
On
Off Menu
%
°C
pH
Rel mV
mV
ATC OK CAL
MEAS
HOLD
°F
°C
Meas Cal
Hold Rcl Store
On
Off Menu
123
456
789
7
%
°C
pH
Rel mV
mV
ATC OK CAL
MEAS
HOLD
°F
°C
Meas Cal
Hold Rcl Store
On
Off Menu
4. Display
5. Keypad
Meas Continuous measurement,
(standard setting)
Hold Auto Hold: automatic retaining
of stable result
on/off On/Off
[▲] [▼] Leaf through menu or memory,
manual temperature setting
Rcl Display of stored results
Cal Calibration mode
Store Storage of current
result or acceptance of
unit configuration
Menu Unit configuration
Main display: Result or user prompt
[mV] Redox voltage, absolute
[Rel mV] Redox voltage, relative to the
hydrogen electrode (DIN 38404)
[pH] pH level
Secondary display: Result - temperature
or user prompt
[%] Percent (sensor evaluation)
[∆
!
] Warning index - battery/ one-point calibration
[°C,°F] Temperature unit
[ATC] Automatic temperature compensation
[OK] Stable measuring signal
[CAL] Calibration mode
[MEAS] Measuring mode - standard
[HOLD] Measuring mode - AUTO-HOLD
8
6. Start up
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. When inserting the batteries, ensure correct
polarity!
Screw the unit back together carefully without exer-
ting 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 batte-
ries 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 comple-
tely empty.
Displayed values in the event of cable break or if no
pH or redox electrode is connected:
If no electrode is connected or if the connecting cable
Remove
6 screws
4 x AA 1,5 V
Don`t
touch
Display
9
is defective, the display still shows pH or mV results.
However, these results are not valid results!
The electrode or temperature sensor must be plug-
ged in before the unit is switched on.
Switch the unit on via the [On/Off] key.
The system must be calibrated when the system is
started up (see Calibration).
Following measurement, please switch the unit off
using the [On/Off] key.
See the enclosed Operating Instructions for more de-
tailed information on storage and care of the electro-
des.
7. Measurement
Measuring mode MEAS
After the unit is switched on, it is automatically in the
standard measuring mode MEAS.
You can switch to the standard MEAS measuring mode
by pressing the [Meas] key.
The display shows the current, possibly still fluctua-
ting result and MEAS. If the result is stable, the [ok]
arrow appears in the display.
Measuring mode HOLD
Pressing the [Hold] key takes you into the AUTO HOLD
measuring mode.
In this mode, the recorded result is checked by the
system in line with the predefined stability criteria until
these criteria are met.
On
Off
Hold
Meas
10
The display shows Auto/Hold in alternating mode to-
gether with the result.
Once a stable reproducible value is present, the result
is shown permanently in the display (“frozen”).
The display also shows HOLD and the automatically
set or manually entered temperature.
If you press the [Hold] key again, the measuring cycle
starts anew and runs until the stability criteria are met.
Temperature measurement, automatic temperature
compensation (ATC)
During pH measurement and redox measurement (re-
lative to the hydrogen electrode [Rel mV]), it is neces-
sary to compensate for the temperature effect of the
electrode.
If a temperature sensor is connected, temperature
compensation is performed automatically (ATC = au-
tomatic temperature compensation).
The unit can automatically distinguish between a
Pt1000 and an NTC30kOhm temperature sensor.
The sensor type is displayed if you simultaneously press
the [Meas] and [Hold] keys.
If a temperature sensor is not connected, you must
manually enter the temperature of the medium to be
tested using the [▲] [▼]keys after switching on the unit
and confirm the value by pressing the [Store] key.
During the measurement process, you can change the
temperature value at any time using the [▲] [▼]keys.
In the HOLD measuring mode, a new Auto Hold mea-
surement is started automatically every time a change
is made.
Hold
+
Hold
Meas +
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