JENCO 3177M User manual

Operation Manual
MODEL 3177M
Cond/TDS/Salt/Temperature
Based Benchtop Meter
3177M

1
CONTENTS
GENERAL INTRODUCTION.........................................2
INITIAL INSPECTION....................................................2
POWER INPUT..............................................................2
INSTALLING THE BATTERIES....................................3
CONNECTORS..............................................................3
DISPLAY & KEY FUNCTIONS..................................................4
A. Display.................................................................4
B. Operational Keys Description................................ 5
OPERATIONAL PROCEDURES...................................6
A. Calibration............................................................6
B. Conductivity, Salinity, TDS Measurements........... 8
C. Save, Recall and Delete Data................................ 8
D. Preparing Conductivity Standard Solutions.............. 9
ERROR DISPLAYS AND TROUBLESHOOTING....... 10
SPECIFICATIONS...................................................... 11
WARRANTY................................................................ 12

2
GENERAL INTRODUCTION
Thank you for selecting the 3177M meter. The 3177M is a precision
tool that measures Conductivity, Salinity, TDS and temperature. A
built-in microprocessor stores, calculates and compensates for all
parameters related to Conductivity. The 3177M is a 5th generation
Conductivity/ Salinity/TDS/temperature benchtop meter.
This meter has a waterproof IP54 case. The mechanical keys are
highly reliable with tactile and audio feedback. It is powered by six
AAA-size alkaline batteries or with a UL/CE approved AC adapter
(OUTPUT:DC9 V). The meter also displays a “BAT” message when
the batteries are in need of replacement. Re-calibration is not
required when power is restored.
The front of the meter has a large LCD that displays Conductivity,
TDS, Salinity and temperature simultaneously along with user
prompts and mode indicators. The unit prompts the user through
calibration and measurement procedures.
The unit is also equipped with a non-volatile memory allowing the
user to store 750 different sets of readings. This unit will assign a
site number for each set of reading so the user can review the data
easily.
The model 3177M comes with a conductivity probe. Other features
include 1 point calibration for Conductivity, automatic temperature
compensation and 50/60 Hz AC noise rejection. This meter is
user-friendly for laboratory application.
INITIAL INSPECTION
Carefully unpack the unit 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.
POWER INPUT
The model 3177M can be powered by an UL/CE approved 100 to
240 VAC adaptor as well as 6 “AAA” alkaline batteries. Check the
label on the AC adaptor supplied with the meter to make sure that
the AC line voltage is correct. If the wrong AC adaptor is supplied,
notify your JENCO representative immediately.

3
INSTALLING THE BATTERIES
To insert the batteries into the meter, follow the procedure outlined
below.
1. Use a Philip screw driver and unlock the battery cover by
turning the screw driver in the counter clockwise direction.
After unlocking the screw, take off the battery cover (Fig.1)
2. Replace the old batteries with new ones and install them on
the correct polarity position.
3. Put the battery cover back on the meter. Use a Philip screw
driver and turn the screw in the clockwise direction to lock the
battery cover.
Figure 1: Battery compartment
CONNECTORS
Figure 2: Connectors
1. Conductivity/ATC connector (8 PIN connector)
2. AC adaptor input connector

4
DISPLAY & KEY FUNCTIONS
A. Display
Figure 3 : Active LCD screen for Conductivity, TDS and Salt
1. mS/cm-
Millisiemens, indicates
Conductivity measurement.
7. mg/L-
Milligrams/Liter indicates
TDS measurement.
2. BAT-
Low battery indicator.
8. ppt-
Parts per thousand,
indicates Salinity
measurement.
3. uS/cm-
Microsiemens, indicates
Conductivity measurement.
9. CELL K=-
Indicates conductivity cell
constant value.
4. CAL-
This will be displayed when
the unit enters into the
calibration mode.
10. %/
℃
-
Indicates Temperature
Coefficient.
5. AUTO-
Auto ranging indicator.
11. MAIN DISPLAY-
For Conductivity, Salinity
and TDS values.
6. ATC-
ATC indicator will be
displayed if a temperature
probe is connected.
12. SECONDARY DISPLAY-
For temperature in ℃.

5
B. Operational Keys Description
Figure 4
NO.
Key
Description
1
Enter
Mode
Cal
Cal-
In conductivity measure mode, press this key to go
to the “Calibration” mode.
2
Clear
Mode
Cal
Enter
Mode/Clear-
Selects display mode. Pressing this key changes
the display sequentially to display Conductivity,
Salinity, TDS, Recall, Delete One and Delete All.
In the conductivity (salinity, TDS) mode, when the
“Mode/Clear” key is pressed for 5 seconds, the
meter clears all calibration values stored in the
internal memory.
In the Recall and Delete modes, press
“Mode/Clear” key to exit “Recall” and “Delete”
modes respectively.
3
Mea.
Eff.
Stand
Slope
Mode
Clear
Power-
Press and hold this key for 2 seconds to power on
and shut off the meter.
4
Enter
Mode
Cal
Enter-
In the measure mode, press “Enter” key for 2
seconds to save reading into the data storage
site.
In the calibration mode, press “Enter” key to save
the current parameter to memory.
In the Recall mode, press “Enter” key to display
the last set of saved data.
In the “Delete All” mode, press “Enter” and enters
the selection screen.
In the “Delete One” mode, press “Enter” key to
delete a single set of data.

6
5
Mea.
Eff.
Stand
Slope
ode
Clear
Mea.
Eff.
Stand
Slope
Mode
Clear
Up & Down-
In the calibration mode, these two keys are used
to adjust the conductivity display value or K value.
In the “Recall” mode, view saved data and data
storage site number by pressing these keys.
In the “Delete ALL” mode, select between the
“YES” and “no” for data all delete.
In the “Delete One” mode, view to be deleted data
and data site numbers by pressing these keys.
OPERATIONAL PROCEDURES
A. Calibration
Calibration setup contains six sections: TDS Constant,
Temperature Coefficient, Temperature Reference, Probe Basic
Cell Constant, Standard Solutions Calibration and K Value
Input. To access these sections:
1. Turn the unit on. In the conductivity/TDS/salinity mode, press
“Mode/Clear” key for 5 seconds, all LCD elements will lit up.
The meter clears all calibration values stored in internal
memory.
2. Connect the conductivity probe to the unit.
3. Press “Mode/Clear” key to go to conductivity mode. “ATC”
icon, “uS/cm” icon and “AUTO” icon will lit up.
4. Rinse the conductivity probe in distilled water and immerse
them in the standard solution. Allow temperature reading to
stabilize, then press “Cal” key to enter the calibration mode.
“CAL” and “ATC” icons appears on the LCD.
[Note: Press “Enter” key to accept any values changes in
each section and automatically advance to the next section. If
there are no changes, the unit accepts the current value and
proceeds to the next section.]
TDS Constant
TDS is determined by multiplying conductivity (mS/cm) by a
TDS factor. The default factor value is 0.65. To change the
TDS factor, use the “Up” or “Down” keys to adjust the value
between 0.30 to 1.00. Press “Enter” key to save the new
value and go to the next calibration parameter.

7
Temperature Coefficient
The unit uses the temperature coefficient to calculate
temperature compensated conductivity. The default value is
1.91%. To change the Temperature Coefficient, use the “Up”
or “Down” keys to adjust the value between 0.00 to 4.00%.
Press “Enter” key to save the new value and go to the
next calibration parameter.
Temperature Reference
The unit uses the temperature reference value to calculate
temperature compensated conductivity. The default value is
25 ℃. To change the temperature reference, press the “Up”
or “Down” keys to adjust the value between 15 to 25 ℃.
Press “Enter” key to save the new value and go to the
next calibration parameter.
Probe Basic Cell Constant
The main display shows the Cell Constant of the conductivity
probe (calibrated previously or default, the deviation range is
70% to 130%). The secondary display shows the current
selected cell constant which is either 0.10 or 0.475. Press the
“Up” or “Down” keys to select the one you want to use. Press
“Enter” key to save the new value and go to the next
calibration parameter.
Standard Solutions Calibration
Immerse the probe in a standard of known conductivity
solution (see section Preparing Standard Solutions),
preferably a standard in the middle range of the solutions to be
measured. Immerse the probe (at least 2” to 3” or 5 to 7cm
from the tip) without touching the sides of the calibration
container. Shake the probe lightly to remove any air bubbles
trapped in the conductivity cell. The unit will display the
conductivity value. Wait for the values of temperature and
conductivity to stabilize for a few seconds. Press the “Up” or
“Down” keys to adjust the reading of the display until it
matches the value of the known standard conductivity solution
at 25 ℃. Press the “Enter” key to save and exit the
calibration.
[Note: If you want input K value directly, press the “Enter”
key to go to the K Value Input.]
K Value Input
The unit will display the cell constant value of the conductivity

8
probe with the CELL K= staying on. Adjust the probe constant
to a known value by pressing the “Up” or “Down” keys. You
can now input the K value (from 70% to 130% of the probe
basic cell constant). Press the “Enter” key to exit calibration
and return to normal operation.
B. Conductivity, Salinity, TDS Measurements
1. Turn the unit on. Connect the conductivity probe to the unit.
2. Press “Mode/Clear” key to go to conductivity/salinity/TDS
mode. “ATC” icon, “uS/cm (ppt/mg/L)” icon and “AUTO” icon
will lit up. Place the probe in the solution to be measured.
Immerse the probe (at least 2” to 3” or 5 to 7cm from the tip).
Shake the probe lightly to remove any trapped air bubbles in
the conductivity cell.
3. Allow sufficient time for the display to stabilize. The meter
will display the conductivity/salinity/TDS value of the sample at
the displayed sample temperature.
[Note: Press “Mode/Clear” key to enter the desired
measurement mode (Conductivity, Salinity or TDS). The
message“rAn9” may appear briefly on the display indicating
auto-ranging; this is normal. Allow temperature to stabilize
before taking measurements.]
C. Save, Recall and Delete Data
1. Saving readings to memory.
a. In the measure modes, press and hold “Enter” key for 2
seconds to save data. The “ID” icon and number with the
corresponding site number will lit up for a brief moment to
indicate a successful data save. Saving is now complete.
b. If “Full” lit up, this means that all 750 data saving sites
are used up. No new data can be saved until existing saved
data are deleted.
2. Recalling readings from memory.
a. Press “Mode/Clear” key until “dAtA rCL” shows. Press
"Enter" key to go into “Recall” mode.
b. To view data, press “Up” or “Down” key to select the
storage site number and displays the corresponding record.
c. Press “Mode/Clear” key to exit “Recall” mode.

9
3. Deleting data.
a. Press “Mode/Clear” key until the “dEL onE” or “dEL ALL”
shows. Then press the “Enter" key to go into the
corresponding “Delete one ” or “Delete ALL” mode.
b. In the “Delete ALL” mode, press the “Enter” and enters the
selection screen. Use the “Up” or “Down” key to select
YES/no for clearing all stored data. To clear all data, select
YES and press the “Enter” key. “nonE” will show after data
is completely deleted.
c. In the “Delete one” mode, use “Up” or “Down” key to select
data to be deleted. Then press “Enter” key to delete.
Deletion is now complete. The next set of saved data will
automatically move up a slot in the storage site.
d. Press “Mode/Clear” key to exit “Delete” mode.
D. Preparing Conductivity 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 3177M.
1. Standard solution of 1413 uS/cm at 25 ℃: Accurately weight
out 0.746 grams of research grade dried Potassium Chloride
(KCL). Dissolve in 1000 ml of distilled water.
2. Standard solution of 12.90 mS/cm at 25 ℃: Accurately weight
out 7.4365 grams of research grade dried Potassium Chloride
(KCL). Dissolve in 1000 ml of distilled water.
3. Standard solution of 111.9 mS/cm at 25 ℃: Accurately weight
out 74.264 grams of research grade dried Potassium Chloride
(KCL). Dissolve in 1000 ml of distilled water.
[Note: You can store the unused portion of the standard
solution in a plastic container for six months but the air space
between the cap and the solution must be kept to an absolute
minimum. Storing the excess solution below 4 ℃can increase
the storage life. If you have any doubt of the accuracy of the
stored solution, a fresh batch should be prepared.]

10
ERROR DISPLAYS AND TROUBLESHOOTING
[Note: If the meter still does not perform normally after the above
measures are taken, call JENCO representative.]
Main
Display
Secondary
Display
Possible cause(s) Corrective
Action(s)
"over" during
measurement
s
0.0 to
100.0 ℃
1. Sample
Conductivity
value > 200.0
mS/cm; Sample
TDS > 200 g/L.
Sample Salinity >
80.0 ppt
2
. Conductivity cell
contaminated or
defective.
3
. Incorrect K
constant value
input.
1. Sample cannot
be tested.
2
. Decontaminate/
clean cell or
replace cell.
3
. Input correct K
value.
"over" during
calibration
0.0 to
100.0 ℃
1. Incorrect standard
solution.
2
. Conductivity cell
contaminated or
defective.
3
. Incorrect K
constant value
input.
1. Replace
standard
solution.
2
. Decontaminate/
clean cell or
replace cell.
3
. Input correct K
value.
"over " during
measurement
s
over
1. Sample
temperature >
100 ℃.
2
. Defective
conductivity cell.
1. Reduce sample
temperature.
2
. Replace cell.
undr
1. Sample
temperature
< 0.0 ℃
2
. Defective
conductivity cell.
1. Increase sample
temperature.
2
. Replace cell.

11
SPECIFICATIONS
Display
Range
Resolution
Accuracy
Conductivity
K=0.1 : 0.00 to 99.99 μS/cm
100.0 to 200.0 μS/cm
K=0.475: 0.0 to 474.9 μS/cm
475 to 4749 μS/cm
4.75 to 47.49 mS/cm
47.5 to 200.0 mS/cm
0.01 μS/cm,
0.1 μS/cm,
1 μS/cm,
0.01 mS/cm,
0.1 mS/cm
±0.5% F.S.
TDS
K=0.1 : 0.00 to 99.99 mg/L
100.0 to 200.0 mg/L
K=0.475: 0.0 to 474.9 mg/L
475 to 4749 mg/L
4.75 to 47.49 g/L
47.5 to 200.0 g/L
0.01 mg/L,
0.1 mg/L,
1 mg/L,
0.01 g/L,
0.1 g/L
±0.5% F.S.
Salinity
0.0 to 80.0 ppt
0.1 ppt
±0.5% F.S.
Temperature
0.0 to 100.0 °C
0.1 °C
±0.2 °C
Conductivity calibration
1 point
Reference Temperature
15.0 to 25.0 °C, default at 25.0 °C
Temperature Coefficient
0.0% to 4.0%, default at 1.91%
TDS Factor
0.30 to 1.00, default at 0.65
Cell Constant
0.10 (2 wire), 0.475 (4 wire)
Temperature sensor
Thermistor, 10 k Ω at 25 °C
Power
6 X 1.5 V AAA Batteries or 100 to
240 VAC adapter
Calibration Back-up
EEPROM
Memory
750 sets
Audio Feedback
All Touch Keys
Screen
Segmented LCD w/backlight
Ambient Temperature Range
0 to 50 °C
Relative Humidity
up to 90%
Case
IP 54
Dimensions (W x D x H)
150 x 210 x 45 mm
Weight
430 grams

12
WARRANTY
JENCO warrants this product to be free from significant deviations
in material and workmanship for a period of 1 year 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
free of 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.
RETURN OF ITEMS
Authorization must be obtained from one of our representatives
before returning items for any reason. When applying for
authorization, 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 authorized returns.
NOTE: JENCO 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: [email protected]; s[email protected]
Website: www.jencoi.com
Jenco Electronics, Ltd.
6F., NO. 81, Sec.2, Chang-an E. Rd., Jhongshan District, Taipei
City 104, Taiwan
TEL: [phone]
FAX: [phone]
E-Mail: [email protected]
Website: www.jenco.com.tw
Shanghai Jenco Instruments, Ltd.
18 Wang Dong Zhong Road Sijing Town, Songjiang Shanghai,
China 201601
TEL: [phone]
FAX: [phone]
E-Mail: [email protected]
Website: www.jenco.com.cn