Knick Portamess 913 Cond User manual

User Manual
Portamess® 913 Cond and
Portamess® 913 X Cond
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Batteries for applications in hazardous locations
Batteries (3 x each) Temp. class Ambient temperature range
Duracell MN1500 T4 –10 °C ≤ Ta ≤ +40 °C
Energizer E91 T3 –10 °C ≤ Ta ≤ +50 °C
Power One 4106 T3 –10 °C ≤ Ta ≤ +50 °C
Panasonic Pro Power LR6 T3 –10 °C ≤ Ta ≤ +50 °C
The batteries listed in the table are used instead of the Varta batteries Type
4006, Type 8006 and Type 3706 listed in the EC-Type-Examination Certificate.
These batteries were tested according to IEC 60079-0:2007, IEC 60079-11:
2006 by a notified body and the test results were set out in an IECEx test
report.
Equipped with the batteries listed in the table, the Model 91. X Cond
portable conductivity meter may be used in hazardous areas.
Be sure to observe the temperature classes and ambient temperature ranges
listed in the table for the different battery types.
Safety Information

Conventions used in this manual
Conventions Used in this Manual
ITALICS are used for texts which appear in the
Portamess® 913 (X) Cond display.
Bold print is used to represent the texts of keys, e.g.
cal.
Display examples
or
keys whose functions are explained are frequently
shown in the left-hand column.
Note Notes provide important information which should
always be observed when using the meter.
Caution Caution means that the instructions given must
always be followed to prevent malfunctions or
damage to the device.
Warning Warning means that the instructions given must
always be followed for your own safety. Failure to
follow these instructions may result in injuries.

1 The Model 913 (X) Cond
The Model 913 (X) Cond
Package contents
Please check the completeness of the shipment after
unpacking.
The package should include:
•Portamess® 913 (X) Cond incl. batteries and
sensor container
•Carrying strap
•User manual
•Quickstart instructions in German, English and French
•Interface cable with adapter for printer and PC
•Paraly® transfer software
Intended use / Short description
•The Portamess® 913 (X) Cond measures conductivity,
salinity, TDS and temperature in industry, the environ-
ment, food processing and waste-water treatment.
•Operation of the Portamess® 913 X Cond is also
permitted in hazardous areas Zone 1.
•The meter meets the EMC requirements of 89/336/
EEC and the recommendations as per NAMUR NE 21.
•The meter is IP 66 protected to EN 60 529 (jet water
from all directions).
•Temperature compensation is automatic with an NTC
30 kΩ or a Pt 1000 temperature detector (automatic
recognition during power-on). When using sensors
without a temperature detector, the temperature can
be manually specified.
•Calibration can be carried out by directly entering the
cell constant, by calibrating with KCl 0.01 mol/l or 0.1
mol/l solutions or with any other calibration solutions.

Caution
•The data logger records up to 100 measured values with
the temperature, date and time. Recording can be done
either manually, interval or event-controlled.
•To minimize battery consumption, the meter switches
off automatically when it is not operated for either one
hour or twelve hours.
•Only three alkaline AA batteries are required for uninter-
rupted operation for approx. 1,000 hours.
•With the Paraly®software, the meter can be completely
remote-controlled from a PC. All measured values and
parameters can be read out and easily processed further
(e.g. using Microsoft Excel).
•Measured values and meter records can also be output
directly to a printer via the serial interface.
The Model 913 (X) Cond
Never use the remote interface in hazardous areas!

2 Operation
Meter design
1 Sensor connection
2, 3 Separate temperature probe connection
4 PC/printer interface connection
5 Sensor container, removable
Operation

Battery
Error
message Main
display
Manual
temperature
detection
Display
Slope (cell
constant)
Keypad
Operation
Press cal key
Secondary
display
Wait
Clock
Read
memory
Write
memory
Pressing on/off switches the meter on or off.
After power-on, the meter automatically carries out a
self-test and adjusts itself to the connected temperature
detector.
Pressing meas returns the meter to the measuring mode
from any function. Pressing meas in the measuring mode
displays the following parameters:
Cond measuring mode: temperature compensation
tdS measuring mode: TDS factor
Note You can also switch the meter on by pressing meas.
However, in this case only a short test is performed and
the temperature detector is not identified. The meter
assumes that the last temperature detector identified is
used.
Temperature
detection using
NTC / Pt1000
Measurement
units

Operation
Pressing cal starts calibration.
▲ ▼ With ▲and ▼you can select and change parameters
and select a mode.
Pressing clock switches the meter into the clock mode.
All measurement processes are canceled and the battery
consumption is reduced to a minimum.
Pressing STO records the measured value in the display
and stores it in the data memory.
Pressing RCL displays stored measured values.
Pressing print outputs the currently measured value to a
printer or PC.
Pressing RCL and then print prints out the data memory.
Pressing cal and then print prints out the meter record.
Pressing STO and then clock switches the meter into the
data logger mode.
+ Pressing clock and STO simultaneously activates the
mode for setting the date and time.
+ Pressing cal and on/off simultaneously when the meter
is switched off, opens the configuration menu.
Note When pressing two keys simultaneously, make sure that
the key shown at the left is pressed first.

I+
V+
V–
I–
4 3 2 1
I–
NTC
V–
NTC
V+
I+
Shield
Connection and start-up
Operation
Sensor
connection
The following sensors from the line of accessories can be
connected to the meter.
SE 202 2-electrode sensor with integrated
NTC 30 kΩ temperature detector
SE 204 4-electrode sensor with integrated
NTC 30 kΩ temperature detector
Connection
assignment
Connection.................................................Socket
Sensor.....................................................................................1
Separate temperature probe.....................................2, 3
Remote interface................................................................ 4
If no temperature detector is used for measurement,
the meter operates with the manually set temperature
and man appears in the display.
Note When using a sensor with integrated temperature
detector, do not connect an external temperature
probe.

Operation
Note If the meter is connected to a PC and is used to take
measurements in a grounded liquid, measuring errors
may result.
Note Prior to first use, the cell constant, temperature com-
pensation and time and date must be checked and set,
if required. The cell constant is printed on the sensor
head and listed in the sensor specifications (see also
page 37).
Note The calibration and configuration data remain perma-
nently stored both with the meter switched off and
with the batteries removed (battery replacement).
Start-up Pressing on/off switches the meter into measuring
mode. After power-on, the meter determines the con-
nected temperature detector and performs a self test:
•Simultaneous appearance of all display segments
•Display of the model number
•Display of the software version
Note For recognition of the temperature detector, the con-
ductivity sensor must be connected to the meter before
power-on. The temperature detector is only recognized
during the power-on procedure after pressing on/off.
Note The meter can also be switched on with meas.
However, in this case only a short test is performed and
the temperature detector is not identified. The meter
assumes that the last temperature detector identified
is used.
Note The SE 202 and SE 204 sensors have an integrated NTC
temperature detector.

Configuration
Operation
The following basic settings can be changed in the
configuration:
Function: Cond (conductivity), SAL (salinity) or tdS (Total
Dissolved Solids or evaporation residue)
•Calibration by entering the cell constant (AutCAL Off)
or calibration with calibration solution (AutCAL On)
•Automatic meter switch-off after 1 hour or 12 hours
•Interface: Printer output On/Off, baud rate
•Temperature display °C or °F
•Date and time format 24 hours and day, month, year
or 12 hours (a.m./p.m.) and month, day, year
+ To activate the configuration, hold down cal with the
meter switched off and then press on/off.
The menu items of the configuration menu are worked
through in sequence. Use ▲and ▼to change the
setting of the respective menu item. STO saves the
parameters and switches to the next menu item.
Pressing meas exits the configuration menu at any
time. The value last displayed and possibly changed will
then not be saved.
Function Select the measuring function: Cond (conductivity), SAL
(salinity) or tdS (Total Dissolved Solids or evaporation
residue).
Automatic
or manual
calibration
Select whether you wish to adapt the sensor by directly
entering the cell constant or by calibrating with a cali-
bration solution and automatic drift check.
(Default setting: Direct entry of the cell constant
(AutCAL OFF))
Direct entry of the cell constant (AutCAL OFF) from
0.010 cm–1 to 199.9 cm–1. (Default setting 0.475 cm–1)

Operation
Automatic calibration (AutCAL On) with 0.1 molar KCl
solution, 0.01 molar KCl solution or entry of the tem-
perature-compensated conductivity of another known
calibration solution.
Automatic
switch-off
To protect the batteries, the meter switches off
automatically when not operated for a longer time.
You can select whether switch-off is to take place after
one hour or after twelve hours (default setting: 1 hour).
If the data logger is active and during remote interface
operation, the auto switch-off feature is disabled.
Interface If the meter is controlled by a PC and interface conflicts
occur when the print key is pressed, you should deacti-
vate the print function (Print OFF)
(default setting: Print On, 4,800 bauds).
The transmission speed can be set to 600, 1200, 2400,
4800 or 9600 bauds.
The transmission speed must correspond to that set in
the printer or PC.
Data format and protocol are permanently set to 7
bits, one stop bit, even parity and XON/XOFF protocol
(NAMUR NE28).
Temperature
display
The temperature can be displayed either in °C or °F
(default setting: °C).

Operation
Date and time
format
You can choose between the display format 24 hours
and day.month.year and the format 12 hours a.m./p.m.
and month.day.year.
(Default setting: 24 hours and day.month.year)

Calibration
Operation
Calibration
solutions
Solutions for calibration of conductivity measuring devices
are unbuffered systems. Care should be taken to use fresh
conductivity standards and to avoid contamination of the
conductivity standard by water droplets adhering to the
conductivity sensor.
Clean sensors Before calibration, make sure that the conductivity sensor
is clean. Residues should be rinsed off with distilled water.
Afterwards, the sensor should be wiped dry and rinsed
with the calibration solution to be used.
Cell constant The cell constant is determined by the size and geometric
arrangement of the measuring electrodes. It is the charac-
teristic parameter of conductivity sensors. The cell constant
changes very little over time. The prerequisite is clean elec-
trode surfaces without insulating deposits. Regular calibra-
tion is therefore generally not necessary.
4-electrode
sensors
With 4-electrode sensors the principle of separate current/
voltage electrodes results in virtually no measuring errors
even in the case of partial soiling of the measuring elec-
trodes. However, electrodes completely soiled with insulat-
ing coatings cause the measurement to fail.
2-electrode
sensors
With 2-electrode sensors for the measurement of low con-
ductivities, e.g. ultrapure water, no calibration with calibra-
tion solutions is possible in practice, as calibration solu-
tions with a correspondingly low conductivity do not have
a stable conductivity value. The use of calibration solutions
with a higher conductivity (> 200 S/cm) would lead to con-
siderable polarization errors. Therefore, the cell constant
must be entered manually when using 2-electrode sensors.
By calibration, the Portamess® 913 (X) Cond is adjusted to
the cell constant of the sensor.
It is generally sufficient to enter the cell constant specified
by the sensor manufacturer.
General information on calibration

Calibration by direct entry of the cell constant (AutCAL OFF)
Operation
SE 202 and
SE 204 sensors
For the conductivity sensor models SE 202 and SE 204, the
cell constant is specified with a tolerance of 2 % and 1.5 %.
This cell constant is entered and stored in the calibration
mode (AutCAL OFF). An additional calibration with calibra-
tion solutions is not necessary.
SE 202 sensor: c = 0.1 cm–1
SE 204 sensor: c = 0.475 cm–1
Press cal to activate calibration. The cell constant deter-
mined or set during the last calibration is displayed.
Pressing meas exits calibration again.
Use ▲and ▼to set the cell constant of the sensor and
confirm by pressing cal. The meter will then switch back to
the measuring mode.

Calibration with 0.1 or 0.01 molar KCl solution (AutCAL On)
Operation
Note Impurities must always be prevented from getting into the
calibration solutions.
Pressing cal activates calibration.
Calibration can be exited again by pressing meas. Then,
the cell constant of the last calibration is displayed briefly.
Select the calibration solution used (CALSoL). A 0.1 and a
0.01 molar KCl solution are available to choose from.
Press cal to confirm the corresponding solution.
Immerse the clean and dry sensor in the calibration
solution (see also “Clean sensors“, page 19).
Press cal to start calibration. If calibration is not desired,
cancel the process by pressing meas.
During calibration the lower line indicates the tempera-
ture. The automatic drift check checks the stability of
conductivity and temperature. The hourglass indicator
flashes.
When the measured values are stable, the temperature-
compensated table value of the KCl solution is displayed.
The measured conductivity value flashes.
Confirm by pressing cal.
The determined cell constant is displayed for a few
seconds. Then, the meter switches back into the measuring
mode.

Calibration with any calibration solution (AutCAL On)
Operation
Note Impurities must always be prevented from getting into the
calibration solutions.
Pressing cal activates calibration.
Calibration can be exited again by pressing meas. Then,
the cell constant of the last calibration is displayed briefly.
First confirm any of the 0.1 or 0.01 mol/l KCl solutions
(CALSoL) by pressing cal.
Immerse the clean and dry sensor in the calibration
solution (see also “Clean sensors“, page 19).
Press cal to start calibration. If calibration is not desired,
cancel the process by pressing meas.
During calibration the lower line indicates the tempera-
ture. The automatic drift check checks the stability of
conductivity and temperature. The hourglass indicator
flashes.
When the measured values are stable, the temperature-
compensated table value of the KCl solution is displayed.
The measured conductivity value flashes.
See the table of your calibration solution for the
conductivity value which belongs to the displayed
measuring temperature.
Set the temperature-compensated conductivity in the
meter using ▲and ▼, then confirm it by pressing cal.
The determined cell constant is displayed for a few
seconds. Then, the meter switches back into the measuring
mode.

Measurement
Measuring the conductivity (Cond)
Operation
Measuring
mode
Pressing meas accesses the measuring mode from all func-
tions. In the measuring mode, the main display indicates
the measured variable and the secondary display shows
the temperature.
Note If the Portamess® 913 (X) Cond is connected to a PC and
measurements are taken in a grounded liquid, measuring
errors may result.
The main display indicates the measured conductivity, the
secondary display shows the temperature.
Temperature
compensation
The meter offers various temperature compensation
methods. With meas and ▲or ▼, the temperature
compensation method can be selected and set:
(tc OFF) No temperature compensation
(tc nLF) Temperature compensation with non-linear charac-
teristic to EN 27088 for natural water and ultrapure water
(reference temperature 25 °C). In the secondary display tc
also appears.
(tc 0.01 – 9.99 %/°C) Temperature compensation with lin-
ear characteristic and definable temperature coefficients
(reference temperature 25 °C). In the secondary display tc
also appears.
Note When you have selected temperature compensation
with linear characteristic, you can only exit this function
or select the nonlinear function when the temperature
coefficient has been set to 0.00.

TDS determination (TDS)
Operation
Measuring the salinity (SAL)
The main display indicates the measured salinity in ‰
(g/kg), the secondary display shows the temperature.
The main display indicates the concentration of the
dissolved solids contributing to the solution conductivity
(TDS, comparable to the evaporation residue) in mg/l, the
secondary display the temperature.
TDS factor Pressing meas and then ▲or ▼sets the TDS factor within
the range 0.40 – 1.00.
Note The TDS factor depends on the composition of the water
to be tested and must be determined for each water type.
Manual
temperature
specification
The man display signals that no temperature detector is
connected. The meter operates with the manually speci-
fied temperature. The specified temperature can be edited
with the ▲and ▼keys in the Cond measuring mode.

Operation
Data memory
Up to one hundred measured values can be saved in the
data memory together with the temperature, date and
time. Storage is performed either manually or automati-
cally using the data logger. The currently measured value
is stored.
Write memory Press STO.
The currently measured value is shown in the display.
Select any memory location with ▲and ▼.
Press STO to store the measured value in the selected
memory location
After storing, the memory location number is automatical-
ly incremented and the meter returns to measuring mode.
Read memory Pressing RCL displays the last stored value.
Select any memory location using ▲and ▼.
Pressing RCL switches between the measured value and
the time/date of storage.
This allows, for example, searching for a value that was
stored at a certain time.
Pressing meas returns to the measuring mode.
Clear memory To clear the entire data memory, press STO to access the
memory mode and then press clock to access the data
logger mode.
Here, select Clear (CLr) using ▲or ▼.
+
By confirming this with STO, the entire data memory is
cleared.
If you do not want to clear the memory, press meas to
cancel.