JENCO 3173 User manual

Operation Manual
MODEL 3173/3173R
MICROCOMPUTER BASED
Conductivity/Salinity/TDS
&Temperature
BENCH METER
3173/3173R

1
INITIAL INSPECTION……………………………………...…..………2
GENERAL INTRODUCTION……………………………………..……2
USING THE METER………………………………………………….…3
THE DISPLAY………………………………………………………….……...……3
THE KEYPAD……………………………………………………………….…...…4
CONNECTORS……………………………………………………………….….…4
REPLACINGTHE BATTERIES…………………………………...…………..…5
TURNING ON / OFF THE INSTRUMENT………………………………………5
MODES OFTHE METER…………………………………………………………6
CALIBRATION SET-UP……………………………………...…………7
BEFORE CALIBRATE……………………………………………………….……7
CALIBRATION PROCESS………………………………………………..………7
MEASUREMENTS………………………………………………………9
RS-232C INTERFACE OPERATION (For 3173R only) ………...…..10
INTRODUCTION…………………………………………………………..……..10
PREPARATION………………………………………………………………...…10
DB-9 CONNECTOR CABLE……………………………………………….….…11
SOFTWARE………………………..………………………………………...….…11
PREPARING & STORAGE STANDARD SOLUTIONS……….... …11
ERROR DISPLAYS……………………………………………….….…13
SPECIFICATIONS………………………………………………..…….14
WARRANTY………………………………………………………....….15
RETURN OF ITEMS…………………………………………........…...16
3173/3173R

2
INITIALINSPECTION
Carefully unpack the instrument and accessories. Inspect for damages made in shipment.
If any damage is found, notify your Jenco representative immediately. All packing
materials should be saved until satisfactory operation is confirmed.
GENERALINTRODUCTION
The Jenco Model 3173/3173R Bench System is a microprocessor based instrument
designed for use in field, laboratories and process control applications. Using a two-wire
electrode cell, it is user-friendly for the precise measurements of conductivity, salinity,
TDS (Total Dissolved Solids) and temperature.
The model 3173/3173R micro-processor allows the user to easily recalibrate the
parameters for the probe. A few keystrokes will adjust all the parameters for compensated
and uncompensated conductivity and will also give the user the option to select three
types (0.1, 1.0, 10) of probe cell constant for a better selection of available probes and
applications. And the user can input Kvalue of the cell by keyboard directly.
The system simultaneously displays temperature in ℃along with either Compensated
Conductivity, Uncompensated Conductivity, Salinity or TDS. The user can switch back
and forth from all these displays by just pushing a single [MODE] key.
This instrument is powered by six AAA-size alkaline batteries or with a UL approved AC
adapter (OUTPUT: DC 9V). The instrument also displays a "LO BAT" message when the
batteries are in need of replacement.
Optional RS-232C can trace all displayed values and interface the meter with recorders,
printers, or computers, etc. This is only for 3173R.
Other features include large LCD display, touch keys with audio feedback, percentage of
power supply display, auto-ranging conductivity, auto-saving calibration values and high
50/60Hz AC noise rejection.

3
USINGTHEMETER
THE DISPLAY
FIGURE 1
1.BAT. ：Low battery indicator。
2.CAL ：Calibration mode indicator。
3.AUTO RANGING ：Auto ranging indicator。
4.10.00 ：Main display。
5. mS、uS ：Unit indicator。
6.UNIT ：Conductivity units。
7.Conductivity/Salinity/Temperature ：Parameters of this meter。
8.℃：Temperature unit。
9.25.0 ：Secondary display。
10.ppt ：TDS unit or salinity unit。
11.ppm ：TDS unit。
12.% ：Percentage unit。
13.CELLK= ：K value。
14.UNCOMPENSATED ：Uncompensated indicator。
15.SALINITY ppt ：Salinity and it’s unit。

4
THE KEYPAD
FIGURE 2
1. The [MODE] key. In normal operation this key will change the display to Conductivity,
compensated Conductivity, Salinity and TDS displays. In calibration mode this key will
exit the current parameter calibration and go to the next calibration parameter.
2. The [CAL] key. During normal operation this key will change the mode from normal to
calibration mode. See section CALIBRATION SET-UP.
3. The [ ∆] key. This key is used during calibration to increment the value / choose
parameters of the display.
4. The [ ∇] key. This key is used during calibration to decrement the value / choose
parameters of the display.
5. The [ENTER] key. During calibration set-up, this key will save the current parameter.
6. The [ON/OFF] key. This key will turn on or turn off the instrument. The last display
mode will be saved.
CONNECTORS
FIGURE3
1. RS-232C connector (for 3173R only) 2. AC ADAPTER connector
3.PROBEconnector 4.Nouse

5
REPLACING THE BATTERIES
Follow the procedures to replace the internal batteries.
1.Replace batteries when the BAT indicator appears on the LCD. The instrument can
operate within specifications for approximately one hour after BAT starts to appear.
2.The battery compartment is located at the bottom side of the meter (Refer to Figure 4).
Flip the meter over so that the bottom side is facing up. Lift the battery compartment
cover to expose the battery compartment.
3.Replace all six type AA batteries.
4.Replace battery compartment cover.
FIGURE 4
TURNING ON / OFF THE INSTRUMENT
Once the batteries are installed correctly and / or an AC adapter is plugged in the unit, it
automatically turns on. If not, press the [ON/OFF] key to turn it on. It will activate all
segments of display for a few seconds then it will display the current cell constant. After a
little while it will display the percentage of power supply. After the self-diagnostic is
completed the temperature will be displayed on the LCD and the instrument is ready to
make a measurement. Immerse the probe half-way in the solution. If possible do not allow
the probe to touch any solid object in the solution. There should be no air bubbles around
the probe either. Shaking or moving the probe vigorously before recording any
measurement will dislodge any bubble formed in the probe.
When the unit is not in use, the user should turn off the instrument by pressing the
[ON/OFF] key to save battery life. By just unplugging the AC adapter will not turn off
the instrument if batteries are present, it would automatically switch to battery
power and will continue to operate.

6
MODES OFTHE METER
This instrument has four modes as follow:
Temperature is always displayed in all modes.
1.Conductivity (uS or mS):
A measurement of the conductive material
in the solution with no regard to
temperature.
2. Compensated Conductivity (uS or mS):
Also known as temperature compensated
conductivity which automatically adjusts
to a calculated value which would have
been read if the sample had been at 25 ℃
( or some other reference temperature
which the user chooses). See section
CALIBRATION SETUP.
3. Salinity (ppt):
A measurement of the salinity in the
solution, the calculation is based on the
Conductivity and Temperature.
4. TDS (ppm or ppt):
A measurement of the total dissolved
solids (TDS), the calculation is based on
the Compensated Conductivity.

7
To change between modes, simply press and release the [MODE] key, the unit will cycle
through these four modes. When change mode, please carefully observe the annunciators
on the LCD.
Note : Every time the unit is turned OFF the last mode will be saved so that when turn the
instrument ON again it will return to this mode.
CALIBRATIONSET-UP
BEFORE CALIBRATE
System calibration is rarely required as Model 3173/3173R were all factory pre-calibrated.
However, from time to time it is wise to check the system calibration and make
adjustment when necessary.
When the new probe / instrument is used, CALIBRATION should be performed, since
the cell constant of conductivity probes may differ from each other.
CALIBRATION PROCESS
1. After the power-on diagnostics, press the [CAL] key and the CAL annunciator will
appear on the display.
TEMPERATURE COEFFICIENT
2. The unit will display 1.91% or a value set previously using
this procedure. Use the [ ∆] and [ ∇] keys to change the
value to the desired new temperature coefficient.
3. Press the [ENTER] key to save the new value of
temperature coefficient or press the [MODE] key to exit
(and go to the next calibration parameter).
TEMPERATURE REFERENCE
4. The unit will display 25.0C or a value set previously using
this procedure. Use the [ ∆] and [ ∇] keys to change the
value to the desired new temperature reference.
5. Press the [ENTER] key to save the new value of

8
temperature reference or press the [MODE] key to exit (and go to the next calibration
parameter).
PROBE BASIC CELLCONSTANT
6. The unit will display the actual (calibrated previously or
default) cell constant while the lower part of the LCD will
display the current selected cell number. Using the [ ∆] and
[ ∇] keys, you can now change the probe basic cell
constant to that you use from the 3 available cell constants
(0.1, 1and 10).
7. Press the [ENTER] key to save the new value of probe
basic cell constant or press the [MODE] key to exit (and go
to the next calibration parameter).
CELL CONSTANT CALBRATION
8. Immerse the probe to a known standard conductivity
solution (See section PREPARING & STORAGE
STANDARD SOLUTIONS) that is chosen to calibrate
your probe. The unit will display the conductivity value of
the standard solution. During cell constant calibration, the
following parameters are over-ridden: temperature reference
(fixed to 25.0℃) and temperature coefficient (fixed to
1.91%).
9. Wait for the values of temperature and conductivity to
stabilize for a few seconds.
If you want input K value directly, please press the [MODE] key to go to the Step 11.
Using the [ ∆] and [ ∇] keys, you can now adjust the reading of the display until it
matches the value of the known standard conductivity solution at 25℃.
10.Press the [ENTER] key to calculate and save the new value of cell constant or press
the [MODE] key to exit (and go to the next calibration parameter).

9
K VALUE INPUT
11.The instrument will display the conductivity value of the
standard solution with the CELL K= flashing.
If the CELL CONSTANT has been calibrated by using Step
9 & 10, please press the [MODE] key to exit calibration
and return to normal operation.
When you press the [ ∆] or [ ∇] keys, the unit will display
Kvalue with the CELL K= staying on. Using the [ ∆] and
[ ∇] keys, you can now input the Kvalue (from 70% to
130% of the probe basic cell constant).
After release the [ ∆] or [ ∇] keys for 2 seconds , the unit
will display the conductivity value with the CELL K=
flashing again.
12.Adjust the Kvalue until the conductivity value displayed on
the LCD matches the value of the known standard
conductivity solution at 25℃.
13.Press the [ENTER] key to save the new Kvalue of the cell
or press the [MODE] key to exit calibration and return to normal operation.
MEASUREMENTS
The Model 3173/3173R is an autoranging instrument. This means that, regardless of the
conductivity of the solution (within the specifications of the instrument), all you need to
do to get the most accurate reading is to put the probe into the sample.
After immersing the probe into the solution, the unit will automatically find the right
range for the solution. During the search, the unit will display “rAnG” on the LCD. The
AUTORANGING will take a few seconds after which the measurement will be displayed.
Press and release the [MODE] key to show values in other parameters.

10
RS-232C INTERFACE OPERATION (For 3173R only)
INTRODUCTION
The RS-232C interface feature can track all displayed values and interface your Jenco
meter with recorders, printers, computers, etc. For example, the user can log all data
simultaneously to an interfaced IBM PC/AT compatible computer.
This section assumes you are familiar with the basics of data communication, the
RS-232C interface, programming with computer languages, like Delphi, VB, VC, etc. A
simple program must be written in order to send command and receive data from the unit.
If you do not have that knowledge, you must have a rudimentary knowledge and a copy of
the more popular Windows® 98 operating system or a later version of Microsoft’s
Windows®operating system capable of using COM port. In addition you must also have
an interface cable of the DB-9 type (sometimes also called a Serial port connector) and
that the wiring of that connector is wired to be compatible to the RS-232C standard for
RxD, Receive Data and TxD, Transmit Data and Circuit Common.
To use the RS-232C interface, you must choose either to download on line from the Jenco
website at http://www.jencoi.com/ a general Windows® compatible program that allows
you to receive data from the Jenco meter as pre-programmed by that Windows®
compatible program or you must custom write your own simple program to send the
commands you want to the Jenco meter and to receive back the specific data sampled at
the time intervals you specify in your custom written program.
PREPARATION
The Jenco unit communicates with a PC computer (IBM PC/AT compatibles) through a
DB-9 interface connector. The DB-9 must be configured to be compatible with the
RS-232C standard for TxD, RxD and Circuit Common. (Please see accompanying
diagram.) After you have connected the cable, turn on both the Jenco unit and the
computer, you are now ready for the software part of the operation.

11
DB-9 CONNECTOR CABLE
Below is the wiring diagram showing the DB-9 connector wired to be compatible to the
RS-232C standard for TxD, RxD and Circuit Common.
Note: The “Standard RS-232C” cable is a 25-Pin connector. The essential Circuit
Common and TxD and RxD are shown here adapted to the DB-9 connector.
DTE DCE
Data Terminal Equipment Data Communications Equipment
( Your computer or recorder, etc.) ( Your Jenco Meter.)
SOFTWARE
A demo program and the protocol are included in the accompanying CD. Using the demo,
you can easily track or recall data from the Jenco meter. Please read the protocol to
understand more about the procedure in detail. You may also choose to download from
our website a pre-programmed Windows® compatible program but you will be limited to
tracking and recalling data as preset in those programs.
PREPARING & STORAGE STANDARD SOLUTIONS
Suitable conductivity standards are available commercially or the user can prepare them
using research grade reagents.
Here are some standard solutions the user can prepare to calibrate the probe of the Model
3173/3173R.
1.Standard solution of 1413 µSat 25°C: Accurately weight out 0.746 grams of research
grade dried Potassium Chloride (KCl). Dissolve it in 1000ml of deionized water
2.Standard solution of 12.90 mS at 25°C: Accurately weight out 7.4365 grams of
research grade dried Potassium Chloride (KCl). Dissolve it in 1000ml of deionized
water
Transmit Data! Pin 2
Receive Data? Pin 3
Circuit Common Pin 7
Pin 2 Receive Data?
Pin 3 Transmit Data !
Pin 7 Circuit Common

12
3.Standard solution of 111.0 mS at 25°C: Accurately weight out 74.2640 grams of
research grade dried Potassium Chloride (KCl). Dissolve it in 1000ml of deionized
water
You can store the remaining solution in a plastic container for one week but the air space
between the cap and the solution must be kept to an absolute minimum. The storage life
can be prolong by storing the solution below 4°C. If you have any doubt of the accuracy
of the stored solution, a fresh batch should be prepared.

13
ERRORDISPLAYS
Main
Display Secondary Display Mode/State Reasons
OuEr
OuEr -10.0～120.0℃
OuE/Und Uncompensated
conductivity
measurement
Uncompensated conductivity is out of the range.
Temperature is out of the -10.0～120℃range.
OuEr
OuEr
LErr
-10.0～120.0℃
OuE/Und
-10.0～120.0℃
Compensated
conductivity
measurement
Compensated conductivity is out of the range.
Temperature is out of the -10.0～120℃range.
Temperature exceeds the limit (compute using the current temperature
coefficient and temperature reference).
OuEr
OuEr -10.0～120.0℃
OuE/Und Salinity
measurement Salinity value is out of the range.
Temperature is out of the -10.0～120℃range.
OuEr
OuEr
LErr
-10.0～120.0℃
OuE/Und
-10.0～120.0℃
TDS
measurement TDS value is out of the range.
Temperature is out of the -10.0～120℃range.
Temperature exceeds the limit (Compute using the current temperature
coefficient and temperature reference).
OuEr
Undr Cell constant calibration Cell constant calibration is greater than ±30% of the selected basic cell constant.
OuE/Und Temperature
measurement Temperature is out of the -10.0～120℃range.

14
SPECIFICATIONS
DISPLAY RANGE RESOLUTION ACCURACY RANGE of TDS (0.5)
0～20.00 uS/cm 0.01 uS/cm ±0.5% FS 0～10.00 ppm
20.0～200.0 uS/cm 0.1 uS/cm ±0.5% FS 10.0～100.0 pm
Conductivity
(PROBE CELL CONSTANT = 0.1)
200～2000 uS/cm 1 uS/cm ±0.5% FS 100～1000 ppm
0～200.0 uS/cm 0.1 uS/cm ±0.5% FS 0～100.0 ppm
200～2000 uS/cm 1 uS/cm ±0.5% FS 100～1000 ppm
Conductivity
(PROBE CELL CONSTANT = 1)
2.00～20.00 mS/cm 0.01 mS/cm ±0.5% FS 1.00～10.00 ppt
0～2000 uS/cm 1 uS/cm ±0.5% FS 0～1000 ppm
2.00～20.00 mS/cm 0.01 mS/cm ±0.5% FS 1.00～10.00 ppt
Conductivity
(PROBE CELL CONSTANT = 10)
20.0～200.0 mS/cm 0.1 mS/cm ±0.5% FS 10.0～100.0 ppt
DISPLAY RANGE RESOLUTION ACCURACY
Salinity 0.0～80.0 ppt 0.1 ppt ±1% FS
Temperature -10.0～120.0 ℃0.1 ℃±0.5 ℃

15
Temperature sensor Thermistor, 10kΩ, at 25℃
Cell constant 0.1, 1.0, 10 ; user selectable
Reference temperature From 15.0 to 25.0℃, default 25.0℃; user
adjustable
Temperature coefficient From 0.00 to 4.00%, default 1.91%; user
adjustable
K value From 70% to 130% of the probe basic cell
constant
TDS constant 0.5 (Fixed)
LCD character size 21mm / 16mm high
Calibration Back-up Yes
Automatic temperature compensation Yes
Audio Feedback All Touch Keys
Communication RS-232C output (for 3173R only)
Power Supply 6 AA batteries / AC adaptor (Output: DC 9V)
Ambient temperature From 0 to 50 ℃
Relative humidity Up to 95%
Weight (Batteries not included) About 650 grams
Dimensions 230mm x 165 mm x 80 mm
WARRANTY
Jenco Instruments, Ltd. warrants this product to be free from significant deviations in
material and workmanship for a period of 3 years from date of purchase. If repair or
adjustment is necessary and has not been the result of abuse or misuse, within the year
period, please return-freight-prepaid and the correction of the defect will be made
without charge. If you purchased the item from our Jenco distributors and it is under
warranty, please contact them to notify us of the situation. Jenco Service Department
alone will determine if the product problem is due to deviations or customer misuse.
Out-of –warranty products will be repaired on a charge basis.

16
RETURNOFITEMS
Authorization must be obtained from one of our representatives before returning items
for any reason. When applying for authorization, please have the model and serial
number handy, including data regarding the reason for return. For your protection,
items must be carefully packed to prevent damage in shipment and insured against
possible damage or loss. Jenco will not be responsible for damage resulting from
careless or insufficient packing. A fee will be charged on all unauthorized returns.
NOTE: Jenco Instruments, Inc reserves the right to make improvements in design,
construction, and appearance of our products without notice.
JENCO INSTRUMENTS, INC.
7968 Arjons Drive, Suite C
San Diego, CA 92126 USA
TEL: [phone] FAX: [phone]
E-MAIL: [e-mail]; [email protected]om
Homepage: http://www.jencoi.com/
JENCO ELECTRONICS, LTD.
PO. BOX LINKOU 117
TAIPEI, TAIWAN
TEL: [phone] FAX: [phone]
E-MAIL: [e-mail]
Homepage: http://www.jenco.com.cn/big5/
SHANGHAI JENCO ELECTRONICS, LTD.
18 Wang Dong Zhong Road
Sijing Town,Songjiang
SHANGHAI,CHINA
TEL: [phone] FAX: [phone]
E-MAIL: [e-mail]
Homepage:http://www.jenco.com.cn/
Version 03（090629）

17
04-11-05:Beacause changing the input K value, the operation is not as same as the
primary. So the manual should be rewrote. Version 2 .
09-6-29:修改或增加 EMAIL 地址信息
使用说明书
机型 3173 编制人 豆林奇 编制日期 2004/09/06
文件编号 K3173-02 修改人 杨启娜 修改日期 2009-6-29
版本号 03 核准人 核准日期