Auxilab KGD003 User manual

KGD003
910/9 Conductivity Meter
Operating Instruction

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
1
⚫Please read the specifications before using the instrument.
⚫The instrument must be sent to metrological service or other departments that
are qualified to check for checking after being used for one year, and only
those qualified ones can be used again.
⚫The expiration date of the electrode should be referred to the “Electrode
Instruction Manual”. Its performance will be affected after the expiration date
whether it’s used or not and should be replaced in time.

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
2
Contents
1 Installation
1.1 Unpacking
1.2 Instrument Structure
1.2.1 Front view of the instrument
1.2.2 Rear view of the instrument
1.2.3 Accessories
1.3 Instrument Installation
1.3.1 Installation of the Meter
1.3.2 Installation of the Power Adapter
1.3.3 Installation of the USB Cable
1.3.4 Installation of the Printer Cable(optional)
2 Operation Guide
2.1 Introduction
2.1.1 Terms Definition
2.1.2 Features
2.1.3 Main Specifications and Performance
2.1.4 Operation Mode
2.1.5 Operation Chart
2.2 Measuring mode
2.3 Power On, Shutdown and Keypad
2.4 Initial Interface
2.5 Instrument Operation
2.5.1 System Setup
2.6 Electrode Calibration
2.6.1 How to calibrate
2.6.2 Calibrate cell constant
2.6.2.1 Preparation before Calibration
2.6.2.2 Start Calibration
2.6.3 Calibrate TDS Factor
2.7 Measurement
2.7.1 Preparation before Measurement
2.7.2 Start with ‘Initial State
2.7.3 Several Ways to Start Measurement
2.7.4 Check Measurement Mode
2.7.5 Check Conductive Probe Information
2.7.6 Check ATC Probe Information
2.7.7 Check Calibration Result
2.7.8 Check Sample Information
2.7.9 Check Result Information

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
3
2.7.10 Start Measurement
2.7.11 End Measurement
2.8 Data Center
2.8.1 View Electrode Calibration Data
2.8.2 View Stored Result
2.8.2.1 View Mode setup
2.8.2.2 Result Reports
2.8.2.3 Output Measuring Results
3 Instrument Maintenance
3.1 Instrument Maintenance
3.2 Common Troubleshooting
4 Appendix

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
4
1. Installation
1.1 Unpacking
Users can find below parts in the packing box:
1．910/9 conductivity meter 1 Set
2．Electrode Holder 1 Pc
3．Accessories 1 Set
1.2 Instrument Structure
1.2.1 Front view of the instrument
Front View (Figure 1)
1) Main engine 2) Electrode Holder
3)ATC probe 4) Conductivity electrode
The Meter is composed of an electric unit and a probe system. The probe system
contains conductive probe and ATC probe. The measurement probe is platinum-black
conductive probe and the temperature sensor isATC probe (Refer to the final packing list for
contents actually shipped). User may select another conductive probe with an appropriate
cell constant for the expected conductivity of the samples to be measured.)

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
5
1.2.2 Rear view of the instrument
Rear View (Figure 2)
5) ATC probe socket 6) Grounding
7) Conductivity electrode socket 8) USB socket
9) Power
1.2.3 Accessories
9) Electrode holder
11) DJS-1D Conductivity electrode
12) Electrode connector (3-pin)

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
6
15) Universal power adapter
16)ATC probe
17) RS232 printer line (optional)
1.3 Instrument Installation
Open the packing box; take out the 910/9 conductivity meter, electrode holder, and other
accessories.

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
7
1.3.1 Installation of the meter
⚫Take out electrode holder base
⚫Insert the electrode holder into the base
⚫Put the electrodes into the electrode holder
⚫Put the Conductive probe into Cond socket
⚫Put theATC probe into the Temp. Socket
⚫Rinse the electrodes with DI water and then pull into sample
1.3.2 Installation of the power adapter
A universal power adapter is included with the 910/9. The power adapter operates at
100–240 V/AC, 50/60 Hz. The output is 9V, 0.8 A.
User should connect the power adapter with the instrument at one side and power
supply at the other side.
Caution:
The power adapter only applies to this instrument; please don't use it to
other instrument. Do not use any other power adapters with the 910/9.

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
8
1.3.3 Installation of the USB communication cable
While using the data collection software, link the instrument and PC with USB
communication cable.After installing the USB driver, it is ready to communication.
Caution:
Please install USB driver on PC before using USB communication function.
1.3.4 Installation of the printer line(optional)
For printing function, customized printing line should be used.Link instrument and
printer(RS232 port) with printer line, set the baud rate of printer to 9600bps, then it’s ready
to print.
Caution:
1. To avoid unnecessary loss, please power off the instrument and printer before
connecting to the printer.
2. The baud rate of the instrument is always 9600bps, default setting is 8 data bits, 1
start bit, 1 stop bit, no parity.
2 Operation guide
2.1 Introduction
Please make sure to read the installation guide and operation guide before using the
meter.
Note following problems before using:
⚫The use of non-original power adapter can cause unnecessary safety problems.
⚫Ensure a good grounding.
⚫Prevent corrosive gas invasion.
⚫Keep the meter interface clean and dry, avoid contacting with acid, alkali, salt solution.
⚫Be careful not to use brute force when installing the electrode. Check the marking of the
electrode plug and insert it carefully.
⚫This instrument is available to long-term stability. After sample test, the
electrode should be immersed in distilled water. If the testing interval is longer
than 6 hours or for long-term storage, it is suggested to be cleaned and stored
in empty protection bottles.
2.1.1 Terms Definition
◼Cell Constant: Also called conductivity pond constant, the ratio of the distance of
electrode slice and area. Usually expressed as cm-1.
◼TDS factor: Conversion factor of conductivity and TDS.
◼Temperature Coefficient: The conductivity variation for each 1℃temperature.

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
9
Usually expressed as %/℃.
2.1.2 Features
910/9 conductivity meter is a new design of high-precision laboratory instruments. It has
following characteristics:
◼It adopts new microprocessor technology；
◼New UI design specification, navigational operating experience, support simple
operates by sliding;
◼It supports to measure conductivity, Total Dissolved Solid (TDS), salinity, resistivity and
temperature value;
◼It supports multi-measurement mode with Continuous reading mode, Balance reading
mode and Timed reading mode; support long timing or interval timing.
◼It supports to save conductivity data, TDS data and salinity data for each 500 sets;
◼It supports to view data. Support multiple access ways, can view stored data according
to storage number; storage time; results are displayed by curve.
◼Supports electrode calibration function. Users can calibrate cell constant or TDS factor.
◼Supports multi-point conductivity calibration, up to 3-point calibration.
◼Supports automatic recognition of conductance standard solution, default four kinds of
JJG standard solution.
◼Supports GLP Norm.
◼It allows users to set meter ID, user ID, electrode ID and series number.
◼It supports to connect the meter with RS232 serial port printer. It can direct to print the
measurement data.
◼It supports to connect the meter with PC that read the last measurement result and
store the reading with our software;
◼Supports firmware update;
◼Power-off protection. The meter will save the measuring data and parameters when it is
power off at abnormal condition.
2.1.3 Main Specifications and Performance
1. Measurement range:
◼Cond: 0.000μS/cm~199.9mS/cm;
◼Resistivity: 5.00Ω.cm~20.0MΩ.cm;
◼TDS: 0.000 mg/L~99.9g/L;
◼Salinity: (0.00~8.00)%;
◼Temp: (-5.0~110.0)℃.
2.Accuracy:
◼Cond: ±0.8％(FS) ;
◼Salinity: ±0.2％;

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
10
◼Temp: ±0.4℃.(0℃≤T≤60℃)，±1.0℃(the other measurement range )。
3. Normal working conditions
◼Environments temperature: (5~35)℃;
◼Relative humidity: ≤75%;
◼There should be no electromagnetic field disturbance except geomagnetic field.
4. Power supply: Power adapter (DC9V; 800mA; inside +/outside -);
5. Dimension (length × width × height, mm): 280×215×92;
6. Weight(kg)：About 1kg.
2.1.4 Operation mode
The meter has 15 operating buttons. The operating buttons are: 1/Output, 2/▽, 3/Save, 4/◁,
5/Setup, 6/▷, 7/View, 8/△, 9/Mode, 0/Measure, ·/Calib, -/Delete, Enter, Cancel and On/Off
buttons. Except ‘Enter’ and ‘Cancel’ buttons, other buttons have double-function. Their
functions are listed as below:
0/mV: Input ‘0’ or switch to mV measurement;
1/Output: Input ‘1’ or press this button to output measuring results;
2/▽, 8/△button: Input ‘2’, ‘8’, or press 2/▽and 8/△, button to select mode;
3/Save: Input ‘3’ or store measuring data;
5/Setup: Input ‘5’ or set different functions;
7/View: Input ‘7’ or view stored or calibrated data;
9/pH: Input ‘9’or begin pH measurement;
·/Calib: Input decimal point or calibrate;
- /Delete: Input negative number or delete function. Pressing this button can delete saved
data when you view them;
On/Off: Turn on or turn off the meter
The meter defaults to the reverse display, and the bar indicates that the change can be set.
The meter has two input methods, one for input characters and one for input numbers. The
title of the input window is the input information prompt, and the upper part is the input
window. The button is displayed below when you enter a character.
When inputting characters, when the user presses the direction key to move the cursor to
the desired character, press the setup key to input a character, press the “mode” key to

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
11
switch the keyboard, including the input of special characters such as uppercase characters,
lowercase characters, numbers, and so on.
When entering a number, the user can directly press the corresponding number key to enter.
The user presses the "Cancel" button to cancel the input, press the "Enter" button to Enter
the input, and press "Delete" to indicate the backspace, that is, to clear an entered
character.
Figure 4. The diagram of Instrument string, data input
2.1.5 Operation chart

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
12
Keyboard input (Figure 5)
2.2 Measurement parameters
The meter meets GLP norms, each measurement contains a complete set of
measurement parameters. Including several parts, such as prompt parameters,
electrode calibration parameters, measure control parameters, sample parameters,
measuring results parameters, etc. Following is a detailed description.
◼Measurement parameters: it is the current measurement parameter types. The
meter allows to measure conductivity value, TDS value, salinity value
◼Measurement method: it is the measurement method of current measurement
parameters. The meter supports three measurement methods, continuous
measurement method, smart measurement methods and timed measurement
method.
Continuous measurement method:

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
13
This measurement method is suitable for continuous
monitoring of the sample data, observing the change
trend of sample. It requires user to manually terminate the
measurement.
Smart measurement method:
Set the balance condition first. The meter will measure ,
calculate and display the result automatically after start
measuring. Once meet the balance condition, the
measurement is finished.
The balance result includes balance time, balance value.
When all the measured data meet the demand of balance
value in the set balance time, It means satisfies balance
conditions, this measurement is finished.
By default, the meter provide four balance conditions to
select, "Fast, Medium, Strict, Custom", different
parameters have different balance conditions. Fast,
medium, and strict are three kinds of balance conditions
provided by the meter, the user cannot modify. User is
only allowed to modify custom type balance conditions.
Timed measurement method:
The meter supports two timed measurement methods,
one is fixed time measurement method, another is fixed
interval time measurement method.
Fixed time measurement method:
When the measurement started, the meter works until
the set time is up, for example set the time as 300
seconds, the meter will continuously measure for 300
seconds.
Note: Fixed time method does not save measuring
results automatically.
Fixed interval time measurement method:
User needs to set measurement interval time and
measurement quantity, then the meter will automatically
collect and record data according to the set interval, the
minimum time interval is 1 second.
◼Calibration result: it is not only the last calibration results of used electrode, but also
the electrode parameter of current measurement parameters to be used. User can
calibrate again.
◼Corrector: it is the calibration operator last time. It cannot be modified by user.
◼calibration time: it is the last calibration time. It cannot be modified by user.
◼Balance condition: By default, the meter provides four balance conditions to select,
"Fast, Medium, Strict, Custom", different balance condition should be selected
corresponding to different measured parameter and measurement environment.
◼Balance time: This parameter corresponding to the balance condition, it is one
parameter of the balance condition, it means the least waiting time of meeting data

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
14
stable condition. All the measured parameter can meet the set balance value during
this time. Once it cannot meet the condition, the meter will keep waiting. The longer
balance time is set, the more strict is the requirement, and vice versa.
◼Balance value: this parameter is corresponding to the balance condition, its a
parameter of balance condition. It is the degree of data can be accepted, the greater
the number is, the easier to balance, and vice versa. Different measurement
parameters have different values.
Note: users can only modify the custom of Balance time, Balance values.
◼Electrode type: it means which type of electrode is using, can be set as combination or
no combination.
◼Electrode name: User can set the name of electrode, up to 20 characters.
◼Electrode serial number: User can set serial number of the electrode, up to 20
characters.
◼ATC probe name: User can set name asATC probe. It cannot be modified by user…
◼ATC probe serial number: User can set serial number of the ATC probe, up to 20
characters.
Note: If has GLP demand, please set above parameters before using.
◼Temperature compensation mode: Each measurement parameter supports
independent temperature compensation, when user selects manual temperature
compensation, the meter will calculate with the manual temperature value set by the
user; When selects automatic compensation, the meter will calculate with the
temperature collected from ATC electrode. If no ATC electrode is connected with the
meter, the meter will still use the manual setting temperature.
◼Manual temperature: use manual temperature when automatic temperature
compensation is invalid.
◼Sample ID: Its the name of the sample, maximum 16 characters.
◼Temperature Compensation Coefficient: Corresponding to measurement of
conductivity, TDS and Salinity. When accuracy measurement is required, the influence
of temperature will affect the measurement accuracy of conductivity; at this point we
need to set temperature compensation coefficient, the default value is 0.020, that is
2.00%/℃.
In the state of conductivity and TDS, after connecting temperature sensor
conductivity will be compensated to the value in 25.0℃according to the set
temperature coefficient. If no temperature sensor is connected, it’ll display the
original conductivity value without compensation.
In the state of salinity, after connecting temperature sensor conductivity will be
compensated to the value in 18.0℃according to the set temperature coefficient. If
no temperature sensor is connected, it´ll display the original conductivity value
without compensation.
◼Set cell constant: this parameter is corresponding to conductivity and salinity
measuring parameter. Usually, there are two ways to get cell constant: calibrate
conductivity electrode with standard conductivity solution or set the cell constant
directly.
The cell constant for each probe was calibrated and displayed in the label on the
probe before shipped. However, transportation and longtime storage may change
the cell constant to some degree. The cell constant may be changed after the probe

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
15
is used for a period of time. It is recommended for user to re-calibrate conductive
probe before measurement.
◼Set TDS Factor: this parameter is corresponding to TDS measuring parameter.
Usually, there are two ways to get TDS factor: calibrate conductivity electrode with
standard conductivity solution or set the TDS factor directly.
◼GLP support: Output result is GLP norm or standard norm.
◼Output option: Output measuring results while stored or not.
◼Instrument serial number: Serial number of the instrument, up to 20 characters.
2.3 Power On, Shutdown and Keypad
Connect power supply, press “ON/OFF”button to turn on the instrument. The
instrument will display information such as model, name, software version. After
self-check, the instrument will enter into initial interface.
After using, press “ON/OFF”button to turn off the instrument.
2.4 Initial Interface
The instrument will enter into initial interface after self-check.
As shown below, time will be displayed above, cell constant of last time calibrated
(or TDS factor), temperature coefficient, current operator ID, sample ID and current
measuring results include conductivity value (or TDS value or salinity value), resistance
value, temperature value are displayed below.
All other operation will start from this interface, the meter will get back to this
interface after related operation finished, we call it initial interface.
✓Press “Setup”button to set cell constant (or TDS factor), operator ID,
sample ID, measurement parameters, instrument serial number, system
time, electrode calibration checking, set buzzer;
✓Press “View”button to view last calibration result or stored measuring
results;
✓Press “Calib”button to re-calibrate slope of the electrode.
For ease of use, the initial state is continuous measurement mode. User can
measure, display data, store, output measuring result, re-calibrate electrode or other
operations.
Note ： For ease use, in the initial state, press ‘Mode’button to view
conductivity value, TDS value and salinity value, etc in the initial state.
If user wants to view results, set parameters or use other measurement mode,
press “Meas”button to select measuring mode, set measurement parameters.

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
16
Figure 6. The diagram of initial state display
2.5 Operation
2.5.1 System setup
System setup include function modules such as cell constant (or TDS factor),
setting operator ID, sample ID, measurement parameters, instrument serial number,
system time, electrode calibration checking, set buzzer.
✓Press “Setup”button in the initial interface to enter, as shown in below.
Figure 7. The diagram of system setup display
◼Set cell constant (or TDS factor): Press ‘Setup’button to set cell constant (or TDS
factor). Two ways to get cell constant: one is to re-calibrate electrode with standard
solution; the other is to input cell constant (the same as TDS factor) when user knows
the cell constant.
◼Set user ID: Select and press “Setup”button to set user ID.
Note: If has GLP demand, please set user ID before using.
◼Set sample ID
Set sample ID, up to 16 characters.
Note: If has GLP demand, please set sample ID before using.
◼Set measurement parameters
Each measuring result contains a complete set of measurement parameters, view
section 2.2 for details.
Note: Save data after setting.
◼Set the meter series number: the meter has only one series number, up to
20 characters.
Note: If has GLP demand, please set sample ID before using.
◼Set system time: Record execution time of the meter, such as operation time,
storage time, electrode calibration time and so on. If the deviation is larger, user
need to adjust according to the local time, time format is year / month / day, hour:

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
17
minute: second.
◼Set electrode calibration check: For ease of use, the instrument has electrode
calibration prompt function. If turn on this function, it will remind user to re-calibrate
electrode.
◼Set buzzer: Set the prompt way of buzzer, including whether buzz or not when the
button is valid and prompt the user whether buzz or not when perform to the special
circumstances.
2.6 Electrode calibration
2.6.1 Several electrode calibration methods
The meter provides a variety of ways to calibrate electrode:
✓In the initial interface, press “Calib”button to re-calibrate electrode;
✓In the interface of view last calibration result, press “Calib”button to re-calibrate
electrode;
✓While measuring, press “Calib”button to re-calibrate electrode.
2.6.2 Calibrate cell constant
The electrode will have some drift, different slope and zero point under different
service environment or unused for a long time and need to be re-calibrated with the
standard solution, the meter can support up to 3-point calibration.
The instrument supports automatic recognition function for electrode standard
solution, default 4 kinds of JJG standard solution.
There are usually two ways to get standard solution, prepare by themselves or
purchase.
First, prepare the conductivity standard solution: on the basis of JJG standard,
users can prepare standard solution by themselves according to below data.
Table of KCl Standard Solution used to measure cell constant
Cell Constant(cm-1)
0.01
0.1
1
10
KCl solution approximate concentration
(mol/L)
0.001
0.01
0.01 or 0.1
0.1 or 1
The Composition of Standard Solution
Approximate concentration (mol/L)
Volume concentration KCl(g/L) solution (in 20℃air)
1
74.2650
0.1
7.4365
0.01
0.7440
0.001
Dilute 100mL 0.01mol/L solution to 1L

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
18
The relationship between KCl solution approximate concentration (Unit：
μS/cm) and its’ conductivity value
Temperature
Approximate
Solution (mol/L)
15.0℃
18.0℃
20.0℃
25.0℃
30.0℃
1
92120
97800
101700
111310
131100
0.1
10455
11163
11644
12852
15353
0.01
1141.4
1220.0
1273.7
1408.3
1687.6
0.001
118.5
126.7
132.2
146.6
176.5
Second, the purchase of conductivity standard solution. If it is inconvenient for users to
prepare standard solution because of the limited conditions, users can also directly
purchase certified standard buffer solution from professional manufacturers.
Caution:
For users’convenience, to reduce the work of prepare standard solution, our company
produce the 4 standard buffer solution mentioned above. Users can buy directly. It is
convenient to use standard solution to calibrate electrode before measurement.
2.6.2.1 Preparation before Calibration
Prepare 1~3 kinds of conductivity standard solution, DI water and etc. as required. Only
one standard solution can be finished calibration before measuring all. To get accuracy
measurement in higher conductivity solution (greater than 50mS/cm), it is better to calibrate
with two standard solution before measuring. One is lower conductivity standard solution
and the other is the conductivity is close to the sample.
2.6.2.2 Start Calibration
Calibration process is as follows: The middle is calibration result; the right is type of
identification, standard value and data, etc.
The meter supports identification of the conductivity solution automatically. The default
standard solution is four JJG standard solution (KCL solution) that concentration are
1mol/L,0.1mol/L,0.01mol/L and 0.001mol/L.
If the meter cannot be identified automatically the standard solution, because cell
constant is different or user uses the standard solution that cannot be identified by the meter.
User has to set type of identification that is ‘Manual Identification’and then input the
standard value by hand.
The meter shows two kinds of identification to standard solution of 0.01mol/L
concentration as following: calibration prompt shows as down area included in current
calibrated data, calibrated help information.
✓Press ‘<’or ‘>’button to view in turn.

Version Nº 2, February 2019 KGD003, Conductivity meter 910/9
19
Figure 8. The diagram of Calibration display
Specific calibration process is as follows:
◼Prepare 1~3 kinds of standard solution as required (can be purchased);
◼Insert conductivity electrode and ATC probe into relevant instrument socket; rinse the
electrode with DI water and immerse it in standard solution;
◼Control temperature of the sample is always (25.0±0.1) ℃or (20.0±0.1) ℃or
(18.0±0.1) ℃or (15.0±0.1) ℃；
◼If it is automatic identification, the meter will automatically identify standard solution
and display the nominal value; if the recognition is failure, may be the ATC probe
connected wrongly, conductive electrode is damaged, or the standard solution passes
its shelf life;
◼If it is manual identification, users need to manually input the nominal value;
◼If the standard solution cannot be identified or there is no input nominal value, this
calibration will not be able to continue;
◼After the reading is stable, press ‘Calib’ key, the meter will calculate and display the
calibration result;
◼If users need to continue calibrating other standard solution. Rinse the electrode
and put into another standard solution. After successfully identified and stable reading,
press ‘Enter’ key to complete the calibration.
◼The meter supports repeatedly calibration of the same standard solution, that is,
supports the function of matching the same standard solution. When the current
calibration solution differs by 50uS/cm from previous calibration solution, the meter
considers the standard solution the same and will automatically cover former standard
solution’s calibration data.
◼If need, user has to set some parameter to finish calibration. Press ‘Setup’button
to set.
◼Press ‘Cancel’button to end calibration.
2.6.3 Calibrate TDS Factor
For the measurement of corresponding TDS, users may need to calibrate TDS factor.
The operation method is similar to calibrate cell constant, basic operations are as follows:
◼Rinse the electrode with DI water.
◼Immerse the conductivity electrode in standard solution; control the temperature of