OHAUS ST300-G User manual

STARTER 300
Portable pH Meter
Instruction Manual
Manual de instrucciones
del pHmetro portátil
STARTER 300
STARTER 300
PH-mètre portable
Manuel d’instructions
STARTER 300
Medidor de pH Portátil
Manual de Instruções
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TABLE OF CONTENTS
1INTRODUCTION...................................................................1
1.1 Definition of Signal Warnings and Symbols ...................................... 1
1.2 Safety Precautions............................................................................ 2
1.3 Display and controls.......................................................................... 3
2INSTALLATION.....................................................................5
2.1 Package contents.............................................................................. 5
2.2 Installing the batteries ....................................................................... 6
2.3 Installing the electrode clip................................................................ 6
2.4 Installing the IP54 seal components ................................................. 6
2.5 Integrated stand for table top use ..................................................... 7
3STARTER 300 SETUP..........................................................8
3.1 Set temperature unit and MTC value................................................ 8
3.2 Selecting a predefined buffer group.................................................. 8
4STARTER 300 OPERATION.................................................9
4.1 Calibration ......................................................................................... 9
4.1.1 Buffer group................................................................................ 9
4.1.2 Performing 1-point calibration ..................................................10
4.1.3 Performing 2-point calibration ...................................................11
4.2 Sample measurement..................................................................... 12
4.2.1 pH measurement...................................................................... 12
4.2.2 mV measurement..................................................................... 12
4.3 Temperature measurement............................................................. 12
4.4 Using the memory........................................................................... 12
4.4.1 Storing a reading...................................................................... 12
4.4.2 Recalling from memory ............................................................ 12
4.4.3 Clearing the memory................................................................ 12
5MAINTENANCE ..................................................................14
5.1 Error message................................................................................. 14
5.2 Meter maintenance.......................................................................... 14
5.3 Electrode maintenance ................................................................... 14
5.4 Self-diagnosis.................................................................................. 15
5.5 Recover factory settings.................................................................. 15
6TECHNICAL DATA.............................................................16
6.1 Specifications................................................................................ 16
6.2 Compliance ..................................................................................... 16
7BUFFER GROUP................................................................18
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STARTER 300 Portable pH Meter EN-1
1 INTRODUCTION
Thank you for choosing OHAUS.
Please read the manual completely before using the STARTER 300 portable pH meter to avoid
incorrect operation.
STARTER 300 has an excellent performance/price ratio and is designed with many useful features.
Other accessories such as different electrodes for different applications, bottle buffer solutions are
also available from OHAUS.
Starter 300 offers many practical features such as:
xErgonomic, multifunctional design for ambidextrous measurements or table top use
xIntegrated table top stand for counter use and semi-permanent installations
xIntegrated labeling design for quick product identification
xIP54 protection against dust and water
xOhaus renowned user friendly software
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
injuries or death if not avoided.
CAUTION For a hazardous situation with low risk, resulting in damage to the
device or the property or in loss of data, or injuries if not avoided.
Attention For important information about the product.
Note For useful information about the product
Warning Symbols
General hazard
Explosion hazard
Corrosive hazard
±
Alternating current
¯
Direct current
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EN-2 STARTER 300 Portable pH 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.
xUse the equipment only in dry locations.
xDry off any liquid spills immediately. The instrument is not watertight.
xWhen using chemicals and solvents, comply with the instructions of the chemical producer
and the general lab safety rules.
xUse only approved accessories and peripherals.
xOperate the equipment only under ambient conditions specified in these instructions.
xDo not operate the equipment in hazardous or unstable environments.
xService should only be performed by authorized personnel.
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STARTER 300 Portable pH Meter EN-3
1.3 Display and controls
Displays
1
Electrode condition
Slope: more than 95%
and offset: ± (0
-15) mV
Electrode
condition is
good
Slope: 90-95%
or offset: ± (
15-35) mV
Electrode
condition is
acceptable
Slope: less than 90%
or offset: ± (>
35) mV
Electrode
condition is
not
good or needs cleaning
2
Endpoint stability icon ; Auto endpoint icon
3
Measurement icon - ; measurement or calibration is running
4
Calibration icon - ; calibration in progress
5
Setup icon - ; instrument is in the setup mode
6
Battery status icon shows the condition of the batteries - fully charged, half-charged or fully
discharged
7
pH/mV reading or slope in calibration process
8
Calibration point / Buffer group /Memory number / Error index
9
Auto temperature compensation - ATC ; Manual temperature compensation - MTC
10
Temperature during measurement or offset in calibration process
2
3
4
1
5
6
7
8
9
10
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EN-4 STARTER 300 Portable pH Meter
Controls
Button
Press & release
Press & hold
for 3 seconds
- Start or endpoint measurement
- Confirm setting, store entered
value
-
Turn
auto endpoint on / off
,
- Start calibration
- Review the latest calibration
data (slope, offset)
- Meter turn on
-
Return
to measurement screen
-
Meter turn off
- Store current reading to memory
-
Increase value during setting
-
Scroll up through the memory
-
Recall stored data
- Switch between pH and mV
measuring modes
-
Decrease value during setting
- Scroll down through the memory
-
Enter setup mode
-
Start self-diagnosis
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STARTER 300 Portable pH Meter EN-5
2 INSTALLATION
Carefully unpack the box.
2.1 Package contents
The ST300-B (basic) package has the following items:
In addition to ST300-B content, the ST300 package also includes the following:
Each pH buffer powder should be dissolved in 250ml pure water or deionized water in volumetric
flask.
Additional Ohaus pH electrodes are available for various applications:
Model
Description
P/N
ST310
3-in-1 plastic refillable pH Electrode
83033965
ST210
2-in-1 plastic refillable pH Electrode
83033966
ST320
3-in-1 plastic gel pH Electrode(no need to fill)
83033967
ST230
2-in 1 glass muddy sample pH Electrode
83033968
STORP1
Gel plastic ORP electrode
30038555
STORP2
Refillable glass ORP electrode
30038553
STTEMP30
Temperature Electrode
83033970
Buffers and Accessories:
Buffer powder set (4.01; 7.00; 10.00)
83033971
Buffer pH1.68 250ml
30100424
Buffer pH4.01 250ml
30100425
Buffer pH7.00 250ml
30100427
Buffer pH10.01 250ml
30100429
Buffer pH12.45 250ml
30100430
Portable Bag for portable meters
30031635
ST300
-B
U
nits
STARTER 300
1
AAA battery
4
Electrode Clip
1
IP54 seal components
1 set
Wrist Strap
1
pH Buffer Powder Set (4.01, 7.00, 10.01)
1 set
ST320 3-in-1 gel pH electrode
1
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EN-6 STARTER 300 Portable pH Meter
2.2 Installing the batteries
Remove the battery cover screw using a coin or screwdriver and remove the battery cover.
Insert the batteries in the battery compartment as shown.
Replace the battery cover and tighten the battery cover screw.
2.3 Installing the electrode clip
The electrode clip is an electrode holder that can be placed on either side of the housing.
Attach the clip by inserting the tabs into the recess.
Slide the clip forward to lock in position.
Slide the shaft of the sensor into the clip from above.
2.4 Installing the IP54 seal components
Use the small plastic tool as shown to install the seal components:
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STARTER 300 Portable pH Meter EN-7
2.5 Integrated stand for table top use
STARTER 300 has an integrated table stand as shown, which can be pushed out to use the meter
on a lab bench or desk. To close the stand, push the middle edge of the stand toward the meter.
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EN-8 STARTER 300 Portable pH Meter
3 STARTER 300 SETUP
3.1 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:
Power the meter on by pressing
Press and hold until the setup icon appears on the display and the current
temperature unit blinks (°C or °F).
Press or to switch between eC and eF .
Press to confirm your selection.
Then
Continue with MTC temperature setting by using or to adjust temperature
compensation accordingly
Press button- to confirm the setting
Press to return to the measurement screen.
The default MTC temperature value setting is 25 °C (77eF).
Note: eC = 5/9 (eF - 32)
3.2 Selecting a predefined buffer group
After confirming the MTC value (or if you are using ATC) you have the option of making a buffer
group selection. In most cases the default buffer group will be used, buffer group b1.
If it is necessary to switch the buffer group, use button- or button- to select a buffer
group among 4 buffer groups shown in section 4.1.1 in this manual. Press button- to confirm
the setting or press button- to return to the measurement screen.
The default buffer group is b1.
b1
1.68
4.01
7.00
10.01
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STARTER 300 Portable pH Meter EN-9
4 STARTER 300 OPERATION
The basic procedure for 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
f) Rinse the pH electrode and store properly
For pH electrode preparation: pH electrode should be rinsed with pure water before and after
using. Check if the electrode is physically damaged. (Be careful with the glass bulb)
The pH electrode should be stored in the included storage bottle; the solution in the bottle is 3M
KCl. After placing pH electrode into the sample or buffer solution, carefully stir with the electrode
for several seconds then wait 30 to 60 seconds for the signal to be stabilize, and then press the
button to operate (Calibration or measurement).
WARNING Do not operate the equipment in hazardous environments. The
equipment is not explosion protected.
WARNING When using chemicals and solvents, comply with the instructions of the
chemical producer and the general lab safety rules.
STARTER 300 will turn off the power automatically without any press operation after 10 minutes.
4.1 Calibration
4.1.1 Buffer group
STARTER 300 can perform 1-, 2- or 3- point calibrations.
There are 4 buffer groups in the meter, you can select the buffer group you prefer (see 4.3),
default buffer group is b1 (US standard), and the buffer value will be automatically recognized
during calibration.
The 4 predefined buffer groups are (at 25°C):
STARTER 300 automatically corrects for the temperature dependence of the buffer pH values
given in the following table - buffer group b1.
b1
1.68
4.01
7.00
10.01
b2
2.00
4.01
7.00
9.21
11.00
b3
1.68
4.00
6.86
9.18
12.46
b4
1.68
4.01
6.86
9.18
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EN-10 STARTER 300 Portable pH Meter
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 receives
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);
4.1.2 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 to ensure the meter is in Auto End point
Mode.
Auto or Manual End point Mode:
oPress and hold to change the End Point Mode.
oWhen in Manual Mode, to manually reach a pH measurement or calibration value,
you need to press button- when reading is stable and displays : then the
sample reading or calibration value freezes, blinks 3 times and freezes on
the display.
oWhen 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 blinks 3 times then disappears; blinks 3 times and freezes on
the display.
oPlease note stability criterion: the signal of the sensor input may not change by
more than 0.1mV in 6 seconds.
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.
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
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STARTER 300 Portable pH Meter EN-11
When STARTER 300 is in pH measurement mode (see 4.2) and Auto End point Mode.; place
the pH electrode in your chosen calibration buffer, stir for 10 seconds, and wait 30-60 seconds,
then:
Press button- . “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 the calibration (e.g. 7.00) value 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 button- to store the 1-point calibration and exit, the offset and the
slope are shown on the display for 3 seconds then return to the measurement
screen.
2. Press button- to reject the calibration, the meter then returns to the
measurement screen.
3. Rinse pH electrode then put into another buffer, press button- to do the 2-
point calibration.(see 4.1.3)
4.1.3 Performing 2-point calibration
Perform 1-point calibration as described above.
Rinse the pH electrode with pure water.
Place the electrode in the next calibration buffer, stir and wait, then press button- ,“Cal
2” 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 the calibration (e.g. 4.01) with the temperature display on the screen.
The 2 point calibration is finished. There are now 3 options :
1. Press button- to do the 3-point calibration.
2. Press button- to reject the calibration, the meter then returns to the
measurement screen.
3. Press button- to store the 2-point calibration and exit, the offset and the
slope are shown on the display for 3 seconds then return to the measurement
screen.
Note: To perform a 3 point calibration, follow the instructions for performing a 2 point calibration
using a third buffer.
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EN-12 STARTER 300 Portable pH Meter
4.2 Sample measurement
4.2.1 pH measurement
Place the electrode in the sample, stir for 10 seconds, and wait 30-60 seconds.
Press button- to start the pH measurement, appears on the display. is blinking
during measurement.
When meter reaches the proper value, the pH value with the temperature is displayed on the
screen.
4.2.2 mV measurement
Press button- to switch between pH and mV measurement.
Follow the same procedure as for pH measurement to perform a mV measurement.
4.3 Temperature measurement
For better accuracy, we recommend to use either a built-in or a separate temperature electrode.
If a temperature electrode is used, ATC and the sample temperature are displayed.
If the meter does not detect a temperature electrode, it automatically switches to the manual
temperature compensation mode and MTC appears. MTC temperature should be set. (See
section 3.1 in this manual)
Note: STARTER 300 accepts NTC 30 kΩtemperature sensor.
4.4 Using the memory
4.4.1 Storing a reading
The STARTER 300 can store up to 30 results.
Press button- when the measurement reaches its final reading, M01 indicates that one
result has been stored.
If you press button- when M30 is displayed, FUL displays to indicate the memory is full. To
store further data you will have to clear the memory. (See 4.4.3 below)
4.4.2 Recalling from memory
Press and hold button- to recall the stored values from memory when the current
measurement reaches its final reading and freezing.
Press button- or button- to scroll through the stored results. R01 to R30 indicates
which result is being displayed.
Press button- to exit.
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STARTER 300 Portable pH Meter EN-13
4.4.3 Clearing the memory
Pressing button- or button- to scroll through the stored results until “MRCL”
appears.
Press button- , CLr blinks;
There are now two choices:
Press button- to confirm the deletion of all the stored data.
Press button- to return to the measurement mode without deleting the memory.
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EN-14 STARTER 300 Portable pH Meter
5 MAINTENANCE
5.1 Error message
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
< - 60 mV
Make sure the pH buffer is correct and fresh;
Clean or replace the pH electrode.
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 than once.
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.
For further technical support please contact Ohaus. (US please contact 1-800-672-7722)
5.2 Meter maintenance
Never unscrew the two halves of the housing!
The STARTER 300 series instruments do not require any maintenance other than replacement of
depleted batteries. To clean, use a damp cloth.
The housing is made of acrylonitrile butadiene styrene (ABS). This material is susceptible to
damage by some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any
spillage should be immediately wiped off.
5.3 Electrode maintenance
Make sure the electrode is filled with electrolyte solution. Always store the electrode according to
the electrode instruction manuals and do not allow it to dry out.
If the electrode response becomes sluggish or the slope is not acceptable, try the following:
oSoak the electrode in 0.1M HCl for at least 8 hours.
oFor fat or oil contaminant, degrease the membrane with cotton wool soaked in either
acetone or a soap solution.
After electrode treatment, a new calibration should be performed. If the electrode slope is still not
acceptable, the electrode might need to be replaced.
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STARTER 300 Portable pH Meter EN-15
5.4 Self-diagnosis
Press and hold and simultaneously until the meter displays the full screen. Each
icon blinks one after the other.
This checks whether all icons are correctly shown. The next step is to check that the keys are
functioning correctly. This requires user interaction.
When b
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. In this case, repeat the self-diagnosis.
Note: You have to finish pressing all five keys within 2 minutes, otherwise Err 1 appears and you
will have to repeat the procedure.
5.5 Recover factory settings
When the meter is off, press and hold & & together for 3 seconds, the
screen displays “RST”and blinks, press to reset factory settings (MTC, slope and
offset, etc.).
Press to switch off the meter.
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EN-16 STARTER 300 Portable pH Meter
6 TECHNICAL DATA
6.1 Specifications
Ambient conditions
xAltitude: Up to 2000 m
xSpecified Temperature range: 5°C to 40°C
xHumidity: maximum relative humidity 80 % for temperatures up to 30°C decreasing linearly to
50% relative humidity at 40°C
xInstallation category: N/A
xPollution degree: N/A
xOperability is assured at ambient temperatures between 5°C to 40°C
Model
ST300
Measuring range
0.00…14.00 pH
–
1999…1999 mV
0 °C…1
00 °C
Resolution
0.01 pH
1 mV
0.1 °C
Error limits
± 0.01 pH
± 1 mV
± 0.5 °C
Calibration
3 points
4 predefined buffer groups
Memory
30 measurements
Current calibration
Power supply
4 xAAA (LR03) batteries
> 500 operating hours
Size/weight
90 W x 150 D x 35 H mm / 0.18 kg
(without batteries)
Display
Liquid crystal
Input
BNC, impedance > 10e+12 Ω
Cinch, NTC 30 kΩ
Temperature-compensation
ATC & MTC
IP protection
IP54
Housing
ABS
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STARTER 300 Portable pH Meter EN-17
6.2 Compliance
This product conforms to the EMC Directive 2004/108/EC and the Low Voltage
Directive 2006/95/EC.
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. 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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EN-18 STARTER 300 Portable pH Meter
7 BUFFER GROUP
STARTER 300 automatically corrects for the temperature dependence of the buffer group pH value
given in the following tables (b2, b3, b4), you can find b1 in 3.1.1.
Buffer group b2 Europe standard
TempćpH2.00 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 JJG119
TempćpH1.68 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 b4 JIS Z 8802
TempćpH1.68 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
45 1.70 4.05 6.83 9.04
50 1.70 4.06 6.83 9.01
www.calcert.com [e-mail]1.888.610.7664 0
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