Page 1
STARTER 3100M
Multi-parameter
Bench Meter
Instruction Manual
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Page 2
TABLE OF CONTENTS
1
INTRODUCTION ................................................................... 1
1.1 Definition of Signal Warnings and Symbols ...................................... 1
1.2 Safety Precautions ............................................................................ 2
1.3 Display and controls .......................................................................... 3
2 INSTALLATION ..................................................................... 5
2.1 Package contents .............................................................................. 5
2.2 Installing the stand-alone electrode holder ....................................... 6
2.3 Installing the power adapter .............................................................. 7
2.4 Connect the electrodes ..................................................................... 7
2.5 Meter stand for adjusting view angle ................................................. 8
2.6 Attached quick guide ......................................................................... 8
3 ST3100M pH Operation ....................................................... 9
3.1 Setup ................................................................................................. 9
3.1.1 Set temperature unit and MTC value ......................................... 9
3.1.2 Selecting a predefined buffer group ......................................... 10
3.2 Calibration ........................................................................................ 11
3.2.1 Performing 1-point calibration ................................................... 11
3.2.2 Performing 2-point calibration .................................................. 12
3.3 Sample Measurement ..................................................................... 13
3.3.1 pH measurement ...................................................................... 13
3.3.2 mV measurement ..................................................................... 13
4 ST3100M Conductivity Operation ..................................... 13
4.1 Setup ............................................................................................... 13
4.1.1 Set temperature unit ................................................................. 13
4.1.2 Set MTC temperature value ..................................................... 13
4.1.3 Set calibration standard point ................................................... 14
4.1.4 Set temperature correction coefficient ..................................... 14
4.1.5 Set TDS factor .......................................................................... 14
4.2 Calibration ....................................................................................... 14
4.2.1 Selecting a standard ................................................................. 15
4.2.2 Performing a calibration ........................................................... 15
4.3 Sample measurement ..................................................................... 16
4.3.1 Conductivity measurement ....................................................... 16
4.3.2 TDS, Salinity or Resistivity measurement ................................ 16
5 Using the memory ............................................................. 17
5.1 Storing a reading ............................................................................. 17
5.2 Recalling from memory ................................................................... 17
5.3 Clearing the memory ....................................................................... 17
6 Printing ............................................................................... 17
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7 MAINTENANCE .................................................................. 20
7.1 Error message ................................................................................. 20
7.2 Meter maintenance.......................................................................... 21
7.3 Self-diagnosis .................................................................................. 21
7.4 Recover factory settings .................................................................. 21
8 TECHNICAL DATA .............................................................. 22
8.1 Specifications .................................................................................. 22
8.2 Compliance ..................................................................................... 23
9 Appendix ............................................................................ 24
9.1 pH Buffer Groups ............................................................................ 24
9.2 Conductivity standards .................................................................... 25
9.3 Examples of temperature coefficients (α-value) .............................. 26
9.4 Conductivity to TDS conversion factors .......................................... 26
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STARTER 3100M Bench Meter EN-1
General hazard
Explosion hazard
Corrosive hazard
Alternating current
Direct current
1 INTRODUCTION
Thank you for choosing OHAUS!
Please read the manual completely before using the STARTER 3100M multi-parameter bench meter
to ensure proper setup, operation and maintenance. STARTER 3100M multi-paramete r bench meter
can measure pH, ORP; Temperature; Conductivity/TDS/Resistivity/Salinity values.
STARTER 3100M multi-parameter bench meter has an excellent performance/price ratio and is
designed with many useful features including a stand-alone electrode holder and a beeper for
error alert. Other accessories such as pH electrodes and buffer solutions are also available.
STARTER 3100M multi-parameter bench meter offers many practical features and functions such as:
x Large backlit LCD with Quick Guide attached under the meter to assist with user operation
x Stand-alone electrode holder for maximum flexibility
x Electrode condition icon automatically showing you the health of your pH electrode
x memory to store up to 99 pH measurements and 99 conductivity measurements
1.1 Definition of Signal Warnings and Symbols
Safety notes are marked with signal words and warning symbols. These show safety issues and
warnings. Ignoring the safety notes may lead to personal injury, damage to the instrument,
malfunctions and false results.
Signal Words
WARNING For a hazardous situation with medium risk, possibly resulting in
CAUTION For a hazardous situation with low risk, resulting in damage to the
Attention For important information about the product.
Note For useful information about the product
Warning Symbols
injuries or death if not avoided.
device or the property or in loss of data, or injuries if not avoided.
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EN-2 STARTER 3100M Bench Meter
1.2 Safety Precautions
CAUTION: Read all safety warnings before installing, making connections, or servicing this
equipment. Failure to comply with these warnings could result in personal injury and/or property
damage. Retain all instructions for future reference.
x Verify that the input voltage range printed on the data label and the plug type matches the
local AC power to be used.
x Make sure that the power cord does not pose a potential obstacle or tripping hazard.
x Use the equipment only in dry locations.
x Dry off any liquid spills immediately. The instrument is not watertight.
x When using chemicals and solvents, comply with the instructions of the chemical producer
and the general lab safety rules.
x Use only approved accessories and peripherals.
x Operate the equipment only under ambient conditions specified in these instructions.
x Disconnect the equipment from the power supply when cleaning.
x Do not operate the equipment in hazardous or unstable environments.
x Service should only be performed by authorized personnel.
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STARTER 3100M Bench Meter EN-3
1
pH Electrode condition
and offset: ± (0
Electrode
good
or offset: ± (
Electrode
acceptable
or offset: ± (
Electrode
not
good or needs cleaning
2
Endp
3
Measurement icon - ; means measurement or calibration is running when blinks.
4
Calibration icon - ; means calibration in progress when display.
5
Setup icon
group
etc.
6
pH/mV reading, or slope of pH electrode calibration; or Conductivity/TDS/Salinity/Resistivity
value, or cell constant of conductivity electrode.
7
Calibration point
8
Auto temperature compensation - ATC ; Manual temperature compensation – MTC;
Conductivity reference temperature - R.Temp
9
Temperature value during measurement or offset (mV) value in pH calibration process.
2 3 4 1 5
8
9
1
2
3 4 5
6
1.3 Display and controls
Displays
Slope: more than 95%
-15) mV
condition is
oint stability icon ; Auto endpoint icon
- ; instrument is in the setup mode, can set temperature(MTC), buffer
/ Buffer group /Memory number / Error index .
Slope: 90-95%
15-35) mV
condition is
Slope: less than 90%
.
35-60) mV
condition is
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EN-4 STARTER 3100M Bench Meter
Button
Press & release
Press & hold
- Switch between pH(mV)
Resisti
measurement interface
- Start or finish measurement
- Confirm setting, store entered
- Turn auto endpoint on / off
- Start calibration
- Recall the latest calibration
- Meter turn on
-
to measurement
- Meter turn off
- Store current reading to memory
-
-
- Recall stored data
-
- Switch between pH and mV
-
-
- Scroll down through the memory
- Enter setup mode
-
Turn on/turn off the backlight
of the LCD
Controls
for 3 seconds
parameter and
conductivity(TDS/Salinity/
vity) parameter when at
value
Exit and return
screen
Increase value during setting
Scroll up through the memory
Switch between conductivity,
TDS, Salinity and Resitivity
Decrease value during setting
Start self-diagnosis
,
data : slope and offset
Print current memory data
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STARTER 3100M Bench Meter EN-5
Model
Description
STCON3
4-ring conductivity electrode (70 μS/cm-200 mS/cm.)
STCON7
Pure water 2-pole conductivity electrode (0.02μS/cm-200 μS /cm)
ST310
3-in-1 plastic refillable pH electrode
ST
U
1
Stand-alone electrode holder (include
holder base, screw and arm)
1
In use cover
1
1413 μS/cm standard solution
1 bottle (about 20ml)
12.88 mS/cm standard solution
1 bottle (about 20ml)
12V Power supply
1 set
RS232 Interface, Scout (Mini-din to RS232
cable)
1
pH Buffer Powder Set (4.01, 7.00, 10.01)
1 set
ST310 3-in-1 refillable pH electrode
1
STCON3 4-ring conductivity electrode
1
2 INSTALLATION
Carefully unpack the box.
2.1 Package contents
The model ST3100M-B multi-parameter bench meter (basic package) has the following items:
3100M-B
STARTER 3100M
In addition to ST3100M-B multi-parameter bench meter content, the ST3100M-F multi -parameter
bench meter package also includes the following:
Each pH buffer powder should be dissolved in 250ml pure water or deionized water in a
volumetric flask.
The best measurement range for STCON3 4-ring (or 4-pole) con ductivity electrode is 70μS/cm-
200mS/cm. In this range the measurement accuracy can reach 0.5%.
If you use STCON3 to measure pure water which conductivity value is below 70μS/cm; the
measurement will be less accurate (approximately 1% to 5%).
Do not use STCON3 to measure conductivity value less than 2μS/cm, the accuracy is not good.
We have STCON7 pure water conductivity electrode which measurement range is 0.02μS/cm-
200μS /cm, with accuracy of 0.02μS/cm.
Additional electrodes available include the followings:
nits
set
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EN-6 STARTER 3100M Bench Meter
ST320
3-in-1 plastic gel pH electrode(no need to fill)
ST350
3-in-1 glass refillable pH electrode
ST210
2-in-1 plastic refillable pH electrode
ST230
2-in 1 glass muddy sample pH electrode
ST260
2-in 1 glass tris-buffer pH electrode
ST270
2-in 1 glass pierce pH electrode
STORP1
Gel plastic ORP electrode
STORP2
Refillable glass ORP electrode
STTEMP30
Temperature Electrode
2.2 Installing the stand-alone electrode holder
Install the electrode arm on the base,
After adjusting the tension knob to some extent, you can move the upper arm up and down. When
the pH electrode is installed on the arm, the storage bottle of pH electrode fits into the base hole.
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STARTER 3100M Bench Meter EN-7
Power supply
Cond.
pH/BNC
Data
Temp
2.3 Installing the power adapter
Insert the right adapter clip into the power adapter slot. The Ohaus balance power supply is also
12V which could also be used for the pH meter.
2.4 Connect the electrodes
There are several sockets for ST3100M.
“BNC” socket for pH electrode,
“TEMP.” Socket (Cinch) for temperature electrode,
“Min-Din” Socket for conductivity electrode,
"Data" socket can connect printer through a connect cable (RS232 Interface, Scout ; from the
mini-din to RS232, item NO 30268982) which is included in the kits.
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EN-8 STARTER 3100M Bench Meter
For ST310 electrode connect to the BNC and Cinch socket. For 2-in-1 pH electrode (e.g. ST210)
you only need to connect to the BNC. Temp. socket is for a separate temperature electrode.
STCON3 or STCON7 have a built-in temperature sensor which do not need a separate
temperature electrode.
2.5 Meter stand for adjusting viewing angle
One unique design feature of the STARTER 3100M is the meter stand, which can be used to adjust
the viewing angle of the display in case of working on a high table.
2.6 Attached quick guide
Another unique design feature of the STARTER 3100M is the attached quick guide, the quick guide
is attached into the bottom housing of the meter.
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STARTER 3100M Bench Meter EN-9
3 ST3100M pH Operation
WARNING Do not operate the equipment in hazardous environments. The
equipment is not explosion protected.
3.1 Setup
3.1.1 Set temperature unit and MTC value
Please note:
If a temperature electrode is used, Automatic Temperature Compensation (ATC) and the sample
temperature are displayed on the screen. You may then choose to skip MTC setup (below).
If the meter does not detect a temperature electrode or one is not used, the meter automatically switches to
Manual Temperature Compensation (MTC) mode and MTC appears on the screen.
MTC can be set as follows:
WARNING When using chemicals and solvents, comply with the instructions of the
chemical producer and the general lab safety rules.
Power on the meter by pressing
Press and hold
temperature unit blinks (°C or °F).
Press
Press
Then
Continue with MTC temperature setting by using
compensation accordingly
Press
Press
The default MTC temperature value setting is 25 °C (77eF).
Note: eC = 5/9 (eF - 32)
Note: STARTER 3100M accepts NTC 30 kΩ temperature sensor.
or to switch between eC and eF .
until the setup icon appears on the display and the current
to confirm your selection.
to confirm the setting
to return to the measurement screen.
.
or to adjust temperature
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EN-10 STARTER 3100M Bench Meter
b1
1.68
4.01
7.00
10.01
b1 (US)
1.68
4.01
7.00
10.01
b2 (EU)
2.00
4.01
7.00
9.21
11.00
b3 (MERCK)
2.00
4.00
7.00
9.00
12.00
b4 (DIN)
1.09
4.65
6.79
9.23
12.75
b5 (JJG)
1.68
4.00
6.86
9.18
12.46
b6 (JIS Z)
1.68
4.01
6.86
9.18
5 °C
1.67
4.01
7.09
10.25
10 °C
1.67
4.00
7.06
10.18
15 °C
1.67
4.00
7.04
10.12
20 °C
1.68
4.00
7.02
10.06
25 °C
1.68
4.01
7.00
10.01
30 °C
1.68
4.01
6.99
9.97
35 °C
1.69
4.02
6.98
9.93
40 °C
1.69
4.03
6.97
9.89
45 °C
1.70
4.05
6.97
9.86
50 °C
1.71
4.06
6.96
9.83
3.1.2 Selecting a predefined buffer group
After confirming the MTC compensation temperature value, make the buffer group selection. Use
or to select a buffer group among 6 buffer groups . Press to confirm the
setting or press
The default buffer group is b1.
Please note:
There are 6 buffer groups in the meter, you can select the buffer group you prefer, the buffer value
will be automatically recognized during calibration. The 6 predefined buffer groups are (at 25°C):
ST3100M automatically corrects for the temperature dependence of the buffer pH values given in
the following table - buffer group b1.
This means, if the buffer solutions’ temperature is 15°C, the calibration value you will get should
be pH1.67 (buffer 1.68), pH4.00 (buffer 4.01), pH7.04 (buffer 7.00) and pH10.12 (buffer 10.01).
to leave to return to the measurement screen.
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STARTER 3100M Bench Meter EN-11
3.2 Calibration
Standard procedure of pH measurement is as follows:
a) pH electrode preparation
b) buffer preparation and pH electrode calibration
c) sample preparation
d) pH measurement
e) Record measurement results or print
f) Rinse the pH electrode and properly store
pH electrode preparation: pH electrode should be rinsed with pure water before and after use.
Check if the electrode is physically damaged. (Be careful with the glass bulb)
Note: please calibrate the pH electrode before measurement.
STARTER 3100M can perform 1-, 2- or 3- point calibrations.
Calibration: pH electrodes need to be calibrated with pH standard buffer solution before a proper
pH measurement can be made. Calibration is to display the correct pH value when meter receive
the mV value signal from the pH electrode.
Slope: the linear coefficient between mV and pH according to theoretical value (e.g. -
59.16mV/pH @ 25°C which means 100% slope);
Offset: the mV value when pH value is 7.00. (Theoretical value is 0 mV);
3.2.1 Performing 1-point calibration
When performing calibration, Ohaus recommends using Auto End Point Mode. After powering
the meter on, be sure the top of the screen shows
Mode.
Auto or Manual End point Mode:
to ensure the meter is in Auto End point
o Press and hold to change the End Point Mode.
o When in Manual Mode, to manually reach a pH measurement or calibration value,
you need to press buttonthen the sample reading or calibration value freezes,
freezes on the display.
o When in Auto End Point Mode, the meter determines when the reading is stable
then displays and locks the reading or calibration value automatically, the reading
freezes and
on the display.
Note: With the 1-point calibration only the offset is adjusted. If the sensor was previously
calibrated with multi-point calibration the previously stored slope will remain. Otherwise theoretical
100% slope (-59.16 mV / pH) will be used.
When STARTER 3100M is in pH measurement mode; place the pH electrode in a calibration buffer,
stir 5 seconds, wait for 30 seconds, then:
blinks 3 times then disappears; blinks 3 times and freezes
when reading is stable and displays :
blinks 3 times and
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EN-12 STARTER 3100M Bench Meter
Press “Cal 1” displays on the bottom left of the screen and “Cal ” is blinking.
and appear on the top of the screen, is blinking during calibration.
The meter reaches endpoint automatically according to the preselected auto-endpoint
mode, the calibration point pH value (e.g. 7.00) with the temperature display on the screen.
The 1-point calibration is finished; There are now 3 options (OHAUS recommends conducting at
least a 2 point calibration);
1. Press
2. Press
shown on the display for 3 seconds then return to the measurement screen.
3. Press
to do the 2-point calibration.
to store the 1-point calibration and exit, the offset and the slope are
to reject the calibration, return to the measurement screen.
3.2.2 Performing 2-point calibration
Perform 1-point calibration as described above.
Rinse the pH electrode with pure water and wipe off with tissue.
Place the electrode in the next calibration buffer, stir and wait, then press
displays on the bottom left of the screen and “
and appear, is blinking during calibration.
The meter reach es endpoint according to the endpoint mode, the calibration point pH value
(e.g. 4.01) with the temperature display on the screen.
The 2-point calibration is finished. There are 3 options:
1. Press
2. Press
shown on the display for 3 seconds then return to the measurement screen.
3. Press
Note: To perform a 3 point calibration, follow the instructions for performing a 2 point calibration
using a third buffer.
to do the 3-point calibration.
to store the 2-point calibration and exit, the offset and slope are
to reject the calibration, return to the measurement screen.
Cal ” is blinking. On the top o f the screen
, “Cal 2”
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STARTER 3100M Bench Meter EN-13
3.3 Sample Measurement
3.3.1 pH measurement
Place the pH electrode in the sample. Stir for 5 seconds; wait for 30 seconds.
Press
measurement.
When meter reaches endpoint, the pH value with the temperature display on the screen.
to start the pH measurement, appears on the display. is blinking during
3.3.2 mV measurement
Press to switch between pH measurement mode and mV measurement mode.
Follow the same procedure as for pH measurement to perform mV measurement.
4 ST3100M Conductivity Operation
After turning on the meter by pressing , press to switch from pH parameter to
conductivity parameter.
4.1 Setup
4.1.1 Set temperature unit
x Press and hold until the set up icon appears on the display and the current
temperature unit blinks. (°C or °F)
x Use
x Press
or buttons to select temperature unit .
to confirm your setting. Continue with temperature value setting by
following or press
Note: °C = 5/9 (°F -32)
to go back to the measurement screen.
4.1.2 Set MTC temperature value
After the temperature unit setting, the meter goes to setup manual temperature (MTC) value
setting.
Use
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or buttons to adjust the temperature value.
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Page 17
EN-14 STARTER 3100M Bench Meter
10 μS/cm
84 μS/cm
500 μS/cm
1413 μS/cm
12.88 mS/cm
Press to confirm your setting. Continue with calibration standard setting by following or
press
to go back to the measurement screen.
4.1.3 Set calibration standard point
After the MTC temperature value setting, the meter goes to setup calibration standard.
The 5 predefined standard points are:
Use the
Press
by following the steps in 4.1.4 or press
or buttons to select calibration standard.
to confirm your setting. Continue with temperatu re correction coefficient setting
to go back to the measurement screen.
4.1.4 Set temperature correction coefficient
After the calibration standard setting, the meter goes to the temperature correction coefficient
setting.
Use the
Press
the steps or press
Note:
If you set the temperature correction coefficient value as 0 %/°C , that means no Tempera ture
Compensation for the conductivity measurement. The meter displays the real conductivity value
at current temperature without compensation.
or buttons to adjust the temperature correction value. (0.00 to 10.00 %/°C).
to confirm your setting. Continue with reference temperature setting by following
to go back to the measurement screen.
4.1.5 Set TDS factor
After selecting the reference temperature, the current TDS factor blinks.
Use
setting or press
or buttons to adjust the TDS factor value. Press to confirm your
to go back to the measurement screen.
4.2 Calibration
The first time you use the conductivity electrode, it should be calibrated before taking any
measurement. Please also read the conductivity electrode instruction manual for reference.
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Page 18
STARTER 3100M Bench Meter EN-15
10 μS/cm
84 μS/cm
500 μS/cm
1413 μS/cm
12.88 mS/cm
4.2.1 Selecting a standard
When using the STARTER 3100M conductivity meter, you have to select a standard for calibration
(see 3.3).
Press and hold the
unit and value. Then the current standard blinks. Use
standards, press
The 5 predefined standards are:
Tables for automatic temperature compensation are programmed in the meter for each standard
(see appendix).
enter setup mode, after press to confirm the temperature
or buttons to select the
to confirm. Press to leave the setup mode.
4.2.2 Performing a calibration
When performing calibration, Ohaus recommends using Auto End Point Mode. After powering
the meter on, be sure the top of the screen shows
Mode.
About Auto or Manual End point Mode, please see 3.2.1.
Place the conductivity electrode in the selected calibration standard solution, wait 10-15s, then
press
The calibration icon
blinking during calibration measurement. The meter reaches endpoint automatically according to
the preselected auto-endpoint mode after the signal has stabilized.
When the calibration is finished, the standard value is displayed and stored; the measurement
icon
blinks 3 times and disappears.
.
and the measurement icon appear on the display. The icon is
to ensure the meter is in Auto End point
To finish the calibration and return to the sample measurement, press
cell constant is then shown on the display for 3 seconds.
Note:
To ensure the most accurate conductivity readings, you should verify your cell constant with a
standard solution before measurement and recalibrate if necessary. Always use fresh standards.
For STCON3 the normal cell constant range is 1.50 – 2.00. (e.g. 1.71 /cm) if the cell constant is
outside the range due to an improper calibration, you may need to recover factory settings (see
5.4), then repeat calibration.
. The cal. data--
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EN-16 STARTER 3100M Bench Meter
4.3 Sample measurement
4.3.1 Conductivity measurement
Place the conductivity electrode in the sample, wait 10-15s, then press to start the
measurement.
The measurement icon
measurement and the display shows the conductivity of the sample.
When it reaches endpoint (auto endpoint or manual endpoint), you can record the result.
Stability criterion for conductivity measurement: The sensor input signal of the meter may not
change by more than 0.4% from the measured average conductivity of the electrode in 6 seconds.
4.3.2 TDS, Salinity or Resistivity measurement
Press to switch between conductivity, TDS, Salinity and Resistivity measurement
mode.
Follow the same procedure as for conductivity measurement.
Ohaus conductivity electrodes STCON3 and STCON7 already have a built-in temperature sensor
to measure the temperature automatically.
appears on the display. The measurement icon is blinking during
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Page 20
STARTER 3100M Bench Meter EN-17
5 Using the memory
5.1 Storing a reading
The STARTER 3100M can store up to 99 pH endpoint results and another 99 conductivity endpoint
results.
Press button
has been stored.
If you press
further data you will have to clear the memory. (See 4.4.3)
when the measurement reaches endpoint. M01 indicates that one result
when M99 is displayed, FUL displays to indicate the memory is full. To store
5.2 Recalling from memory
Press and hold to recall the stored values from memory when the current
measurement reaches endpoint.
Press button
which result is being displayed.
Press
or to scroll through the stored results. R01 to R99 indicates
to exit.
5.3 Clearing the memory
Press or to scroll through the stored results until “MRCL” appears.
Press
There are now 2 options:
Press
, CLr blinks;
to confirm the deletion of all the stored data.
Press
to return to the measurement mode without deleting the memory.
6 Printing
If the printer is connected to the STARTER 3100M (e.g. SF-F40A) green light means connection
success.
Printer baud rate 9600bps; 8 data bit; none parity bit; 1 stop bit,
A print-out is automatically generated after each end pointed measurement or calibration.
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EN-18 STARTER 3100M Bench Meter
When ST3100M is in pH parameter:
The format for the print-out following a pH measurement is:
End Point, Value, Temp., ATC/MTC
Auto EP, 4.01pH, 25.0ºC, MTC
The details for the second line are:
Auto EP, 4.01pH, 25.0ºC , MTC
| | | |---- Manual Temperature Compensation
| | |---------------- Temperature value and unit ºC
| |------------------------- pH value
|---------------------------------------- Auto End Point
The format for the print-out following a mV measurement is:
End Point, Value, Temp., ATC/MTC
Auto EP, 182mV, 23.2ºC, ATC
The print-out in case of an error message is:
End Point, Value, Temp., ATC/MTC
Error3
The print-out for a 2-point calibration is:
Buffer1: 4.01pH
mV1: 178mV
Temp.1: 25.0ºC
Buffer2: 7.00pH
mV2: 3mV
Temp.2: 25.0ºC
Slope: 99%
Offset: 5mV
ATC/MTC: MTC
The print-out for a 3-point calibration is:
Buffer1: 4.01pH
mV1: 178mV
Temp.1: 25.0ºC
Buffer2: 7.00pH
mV2: 0mV
Temp.2: 25.0ºC
Buffer3: 9.21pH
mV3: -130mV
Temp.3: 25.0ºC
Slope: 100%
Offset: 0mV
ATC/MTC: ATC
Printing from memory:
When scrolling through the memory you can print the entry that is currently viewed by pressing
and holding(3 seconds)
Recall 01:
End Point, Value, Temp., ATC/MTC
Auto EP, 4.01pH, 35.6ºC, ATC
. The printout format is as follows:
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Page 22
STARTER 3100M Bench Meter EN-19
When ST3100M is in conductivity parameter:
The format for the print-out following a Cond. measurement is:
End Point, Value, Temp., ATC/MTC
Auto EP, 68.8μS/cm, 26.8°C , ATC
Ref.25°C , T.Comp.Coeff. 2.00%/°C
The details for the second line are:
Auto EP, 85.1μS/cm, 26.8°C, ATC
| | | |---- Auto Temp. Compensation
| | |----------------Temperature value and unit
| |------------------------- Conductivity value
|---------------------------------------- Auto End Point
The details for the third line are:
Ref.25°C , T.Comp.Coeff. 2.00%/°C
| |
| |---------------- Temperature compensation coefficient value
|------------------------------------------- Reference temperature, 20 or 25 °C
The format for the print-out following a TDS measurement is:
End Point, Value, Temp., ATC/MTC
Auto EP, 38.0mg/L, 23.2°C , ATC
Ref.25°C , T.Comp.Coeff. 2.00%/°C
TDS-F 0.5
The format for the print-out following a Salinity measurement is:
End Point, Value, Temp., ATC/MTC
Auto EP, 0.08psu, 25.0°C , MTC
The print-out in case of an error message is:
End Point, Value, Temp., ATC/MTC
Error4
The print-out for a successful calibration is:
Standard: 1413μS/cm
Temperature: 30.0 °C
Calibration value: 1552μS/cm
Cell Constant: 1.66 cm-1
ATC/MTC: ATC
Printing from memory:
When scrolling through the memory you can print the entry that is currently viewed by pressing
and holding
Recall 08:
EndPoint, Value, Temp., ATC/MTC
Auto EP, 68.8μS/cm, 26.8°C , ATC
Ref.25°C , T.Comp.Coeff. 2.00%/°C
for 2 seconds. The printout format is followings:
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Page 23
EN-20 STARTER 3100M Bench Meter
Error 0
Memory access error
Reset to factory settings
Error 1
Self-diagnosis failed
Repeat the self-diagnosis procedure and make
sure that you finish pressing all five keys within two
minutes
Error 2
Measured values out of
range
Check if the electrode is properly connected and
placed in the sample solution.
Error 3
Measured buffer temperature
out of range (<5 or >40 °C)
Keep the pH buffer temperature within the range
for calibration
Error 4
Offset out of range
offset > 60mV or <
Make sure the pH buffer is correct and fresh;
Clean or repla
Error 5
Slope out of range
Make sure the buffer is correct and fresh; Clean or
replace the pH electrode.
Error 6
Meter cannot recognize the
buffer
Make sure the buffer is correct and fresh; check if
the buffer has not been used more
Error 9
The current data set has
already been stored once
An endpoint reading can only be stored once.
Perform a new measurement to store.
Error 10
The sample temperature is
out of range
Check the sample temperature, the temperature
sensor.
Error 0
Memory access error
Reset to factory settings
Error 1
Self-diagnosis failed
Repeat the self-diagnosis procedure and
make sure that you finish pressing all five
keys within two minutes.
Error 2
Measured values out of range
C:
TDS:
SAL: > 100.0 psu
Make if the electrode is properly connected
an
Error 3
Measured standard temperature out
of range (5 ... 35 °C)
Keep the standard temperature within the
range for calibration
Error 4
Measuring temperature out of range
(0 ... 100
Check if the electrode is properly connected
and keep the sample temperature within the
range
Error 9
The current data set has already
been stored once
An endpoint reading can only be stored
once. Perform a new measurement to store.
7 MAINTENANCE
7.1 Error message
When ST3100M is in pH mode:
- 60 mV
When ST3100M is in conductivity mode:
> 199.9 mS/cm
< 0.1 mg/L or > 199.9 g/L
°C)
ce the pH electrode.
than once.
d placed in the sample solution
If an error occurs, the meter will also beep 3 times to alert.
For further technical support please contact Ohaus. (US please contact 1-800-672-7722).
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Page 24
STARTER 3100M Bench Meter EN-21
b
7.2 Meter maintenance
Never unscrew the two halves of the housing!
The STARTER 3100M series instruments do not require any maintenance other than occasional
wipe with a damp cloth and the replacement of depleted batteries.
The housing is made of acrylonitrile butadiene styrene (ABS). This material is attacked by some
organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage should be
immediately wiped off.
About the maintenance of the pH electrode or conductivity electrode, please see the electrode
manual instructions.
7.3 Self-diagnosis
When the meter is on, press and hold and simultaneously until the
meter displays the full screen. Each icon blinks one after the other.
This way you may check whether all icons are correctly shown. The next step is to check that the
keys are functioning correctly. This requires user interaction.
When b
blinks, five icons are displayed.
Press the five keys in any order. Each time you press a key an icon disappears from the
screen, continue to press the other keys until all the icons have disappeared.
When the self-diagnosis has been completed successfully, PAS appears. If self-diagnosis fails,
error message Err 1 appears.
Note: You have to finish pressi ng all five keys within 2 minutes, otherwise Err 1 appears and you
will have to repeat the procedure.
7.4 Recover factory settings
When the meter is off, press and hold & & simultaneously
for 3 seconds, the screen displays
Press
then restart the meter.
Or press
turned off.
to reset factory settings (MTC, slope and offset, etc.), display
to quit the setting, the screen displays and the meter is then
and blinks, this means “Reset”. There are 2 options:
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Page 25
EN-22 STARTER 3100M Bench Meter
Spec.
ST3100M
Measurement
pH
–2.00…20.00 pH
mV
–2000…+2000mV
Conductivity
0.0 μS/cm…199.9mS/cm
TDS
0.1mg/l…199.9 g/l(TDS)
Resistivity
0…20MΩЬcm
Salinity
0-100 psu
Temperature
-5°C…110 °C
Resolution
pH
0.01pH
mV
1mV
Conductivity
0.01 μS/cm Auto range
TDS
0.01 mg/L Auto range
Resistivity
0.01 Ω•cm Auto range
Salinity
0.01 psu
Temperature
0.1 °C
Limits/Accuracy
pH
± 0.01 pH
mV
± 1mV
Conductivity
etc.
± 0.5 %F.S.
Temperature
± 0.3 °C
Calibration
pH Up to
Conductivity
5 predefined conductivity standard points
99 sets pH and 99 sets conductivity data, last
calibration data
8 TECHNICAL DATA
8.1 Specifications
Ambient conditions
x Indoor use only
x Altitude: Up to 2000 m
x Specified Temperature range: 5°C to 40°C
x Humidity: maximum relative humidity 80 % for temperatures up to 30°C decreasing linearly to
50% relative humidity at 40°C
x Mains supply voltage fluctuations: up to ±10% of the nominal voltage
x Installation category II
x Pollution degree: 2
x Operability is assured at ambient temperatures between 5°C to 40°C
Range
Error
3 point, 6 buffer groups
Memory
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Page 26
STARTER 3100M Bench Meter EN-23
Power/Battery
AC Adapter Input: 100-240V ~ X.XA 50/60 Hz
AC Adapter Output: 12V X.XA
Size/weight
Approximately 220 W x 175 D x 78 H mm /
0.95 kg
Display
LCD with backlight
pH
BNC, impedance >10e+12 Ω
Conductivity
Mini-Din
Temperature
Cinch, NTC 30 kΩ
Data
RS232
Temp
Compensation
ATC or MTC
Compensation
pH
0 °C…100 °C for pH
Conductivity
Temperature Coefficient range:
0.00 %/°C…10.00 %/°C
Ref T: 20 or 25 °C
Housing
ABS
Input
Temp
Range
8.2 Compliance
This product conforms to the EMC Directive 2004/108/EC and the Low Voltage
Directive 2006/95/EC. The Declaration of Conformity is available online at
europe.ohaus.com/europe/en/home/support/compliance.aspx.
In conformance with the European Directive 2002/96/EC on Waste Electrical
and Electronic Equipment (WEEE) this device may not be disposed of in
domestic waste. This also applies to countries outside the EU, per their specific
requirements. Please dispose of this product in accordance with local
regulations at the collecting point specified for electrical and electronic
equipment. If you have any questions, please contact the responsible authority
or the distributor from which you purchased this device. Should this device be
passed on to other parties (for private or professional use), the content of this
regulation must also be related. Disposal instructions in Europe are available
online at europe.ohaus.com/europe/en/home/support/weee.aspx. Thank you for
your contribution to environmental protection.
FCC Note: This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
ISO 9001 Registration
In 1994, OHAUS Corporation, USA, was awarded a certificate of registration to ISO 9001 by
Bureau Veritus Quality International (BVQI), confirming that the OHAUS quality
management system is compliant with the ISO 9001 standards requirements. On June 21,
2012, OHAUS Corporation, USA, was re-registered to the ISO 9001:2008 standard.
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Page 27
EN-24 STARTER 3100M Bench Meter
9 Appendix
9.1 pH Buffer Groups
STARTER 3100M automatically correct for the temperature dependence of the buffer group pH value
given in the following tables (b2, b3, b4, b5, b6), you can find b1 in 3.1.2 .
Buffer group b2 Europe standard
Tempć pH2.00 pH4.01 pH7.00 pH9.21 pH11.00
5 2.02 4.01 7.09 9.45 11.72
10 2.01 4.00 7.06 9.38 11.54
15 2.00 4.00 7.04 9.32 11.36
20 2.00 4.00 7.02 9.26 11.18
25 2.00 4.01 7.00 9.21 11.00
30 1.99 4.01 6.99 9.16 10.82
35 1.99 4.02 6.98 9.11 10.64
40 1.98 4.03 6.97 9.06 10.46
45 1.98 4.04 6.97 9.03 10.28
50 1.98 4.06 6.97 8.99 10.10
Buffer group b3 MERCK (Ref. 20°C)
Temp °C pH 2.00 pH4.00 pH7.00 pH9.00 pH12.00
5 2.01 4.04 7.07 9.16 12.41
10 2.01 4.02 7.05 9.11 12.26
15 2.00 4.01 7.02 9.05 12.10
20 2.00 4.00 7.00 9.00 12.00
25 2.00 4.01 6.98 8.95 11.88
30 2.00 4.01 6.98 8.91 11.72
35 2.00 4.01 6.96 8.88 11.67
40 2.00 4.01 6.95 8.85 11.54
45 2.00 4.01 6.95 8.82 11.44
50 2.00 4.00 6.95 8.79 11.33
Buffer group b4 DIN (19267) (Ref. 25°C)
Temp °C pH1.09 pH4.65 pH6.79 pH9.23 pH12.75
5 1.08 4.67 6.87 9.43 13.63
10 1.09 4.66 6.84 9.37 13.37
15 1.09 4.66 6.82 9.32 13.16
20 1.09 4.65 6.80 9.27 12.96
25 1.09 4.65 6.79 9.23 12.75
30 1.10 4.65 6.78 9.18 12.61
35 1.10 4.65 6.77 9.13 12.45
40 1.10 4.66 6.76 9.09 12.29
45 1.10 4.67 6.76 9.04 12.09
50 1.11 4.68 6.76 9.00 11.98
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Page 28
STARTER 3100M Bench Meter EN-25
T(°C)
10 μS/cm
84 μS/cm
μS/cm
1413μS/cm
12.88 mS/cm
5
6.1 μS/cm
53 μS/cm
315.3μS/cm
896 μS/cm
8.22 mS/cm
10
7.1 μS/cm
60 μS/cm
359.63μS/cm
1020 μS/cm
9.33 mS/cm
15
8.0 μS/cm
68 μS/cm
402.93μS/cm
1147 μS/cm
10.48 mS/cm
20
9.0 μS/cm
76 μS/cm
451.53μS/cm
1278 μS/cm
11.67 mS/cm
25
10.0 μS/cm
84 μS/cm
500.03μS/cm
1413 μS/cm
12.88 mS/cm
30
11.0 μS/cm
92 μS/cm
548.5μS/cm
1552 μS/cm
14.12 mS/cm
35
12.1 μS/cm
101 μS/cm
602.53μS/cm
1667 μS/cm
15.39mS/cm
Buffer group b5 JJG119
Tempć pH1.68 pH4.00 pH6.86 pH9.18 pH12.46
5 1.67 4.00 6.95 9.39 13.21
10 1.67 4.00 6.92 9.33 13.01
15 1.67 4.00 6.90 9.28 12.82
20 1.68 4.00 6.88 9.23 12.64
25 1.68 4.00 6.86 9.18 12.46
30 1.68 4.01 6.85 9.14 12.29
35 1.69 4.02 6.84 9.11 12.13
40 1.69 4.03 6.84 9.07 11.98
45 1.70 4.04 6.83 9.04 11.83
50 1.71 4.06 6.83 9.02 11.70
Buffer group b6 J IS Z 8802 (Japanese)
Tempć pH1.68 pH4.01 pH6.86 pH9.18
5 1.67 4.00 6.95 9.40
10 1.67 4.00 6.92 9.33
15 1.67 4.00 6.90 9.28
20 1.68 4.00 6.88 9.23
25 1.68 4.01 6.86 9.18
30 1.68 4.02 6.85 9.14
35 1.69 4.02 6.84 9.10
40 1.69 4.04 6.84 9.07
9.2 Conductivity standards
500
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Page 29
EN-26 STARTER 3100M Bench Meter
Substance at 25 °C
Concentration [%]
Temperature coefficient α [%/°C]
HCl
10
1.56
KCl
10
1.88
CH3COOH
10
1.69
NaCl
10
2.14
H2SO4
10
1.28
HF
1.5
7.20
Standard
Measurement
temp.: 15°C
Measurement
temp.: 20°C
Measurement
temp.: 30°C
Measurement
temp.: 35°C
84 μS/cm
1.95
1.95
1.95
2.01
1413 μS/cm
1.94
1.94
1.94
1.99
12.88 mS/cm
1.90
1.89
1.91
1.95
Conductivity
At 25 °C
TDS KCl
TDS NaCl
ppm value
Factor
ppm value
Factor
84 μS
40.38
0.5048
38.04
0.4755
447 μS
225.6
0.5047
215.5
0.4822
1413 μS
744.7
0.527
702.1
0.4969
1500 μS
757.1
0.5047
737.1
0.4914
8974 μS
5101
0.5685
4487
0.5000
12.88 μS
7447
0.5782
7230
0.5613
15 μS
8759
0.5839
8532
0.5688
80 mS
52.168
0.6521
48.384
0.6048
9.3 Examples of temperature coefficients (α-value)
α-coefficients of conductivity standards for a calculation to a reference temperature of 25°C
9.4 Conductivity to TDS conversion factors
Ohaus products are warranted against defects in materials and workmanship from the date of
delivery through the duration of the warranty period. During the warranty period Ohaus will repair,
or, at its option, replace any component(s) that proves to be defective at no charge, provided that
the product is returned, freight prepaid, to Ohaus.
This warranty does not apply if the product has been damaged by accident or misuse, exposed to
radioactive or corrosive materials, has foreign material penetrating to the inside of the product, or
as a result of service or modification by other than Ohaus. In lieu of a properly returned warranty
registration card, the warranty period shall begin on the date of shipment to the authorized dealer.
No other express or implied warranty is given by Ohaus Corporation. Ohaus Corporation shall not
be liable for any consequential damages.
As warranty legislation differs from state to state and country to country, please contact Ohaus or
your local Ohaus dealer for further details.
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LIMITED WARRANTY
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