Ohaus STARTER 300 User manual

Ohaus
Brand
Ohaus
Model
STARTER 300
Category
Measuring, testing & control
Type
User manual
STARTER 300
Portable pH Meter
Instruction Manual
1
Table of Contents
1 Introduction .......................................................................... 2
1.1 Safety measures .............................................................................. 2
1.2 Display and controls ........................................................................ 3
2 Installation ............................................................................ 5
2.1 Package contents ............................................................................. 5
2.2 Installing the batteries ..................................................................... 5
2.3 Installing the electrode clip ............................................................. 5
2.4 Installing the IP54 cover .................................................................. 6
2.5 Integrated stand for table top use .................................................. 6
3 STARTER 300 operation ...................................................... 7
3.1 Calibration ........................................................................................ 7
3.1.1 Buffer group ................................................................................ 7
3.1.2 Performing 1-point calibration .................................................... 7
3.1.3 Performing 2-point calibration .................................................... 8
3.2 Sample measurement ...................................................................... 8
3.2.1 pH measurement ........................................................................ 8
3.2.2 mV measurement ....................................................................... 8
3.3 Temperature measurement ............................................................. 8
3.4 Using the memory ............................................................................ 9
3.4.1 Storing a reading ........................................................................ 9
3.4.2 Recalling from memory .............................................................. 9
3.4.3 Clearing the memory .................................................................. 9
4 Setup ..................................................................................... 9
4.1 Set endpoint mode ........................................................................... 9
4.2 Set temperature unit ........................................................................ 9
4.3 Set manual temperature compensation ...................................... 10
4.4 Selecting a predefined buffer group ............................................ 10
5 Maintenance ....................................................................... 10
5.1 Error message ................................................................................ 10
5.2 Meter maintenance ........................................................................ 10
5.3 Electrode maintenance .................................................................. 10
5.4 Self diagnosis .................................................................................. 11
6 Specifications .................................................................... 11
7 Buffer group ....................................................................... 12
2
1 Introduction
Thank you for purchasing this high quality OHAUS meter. Please read the manual completely
before using the STARTER 300 portable pH meter to avoid incorrect operation.
The STARTER 300 has an excellent price/performance ratio and is designed with many useful
features including a table top stand, a labeling area, an electrode clip and a wrist strap. Other
accessories such as electrodes, pH buffer power set are also available from OHAUS.
You will find much helpful functionality in these meters. A few of the many existing features are:
Ergonomic, multifunctional design for ambidextrous measurements or table top use
Integrated table top stand for counter use and semi-permanent installations
Integrated labeling design for quick product identification
IP54 protection against dust and water
Ohaus’ renowned user friendly software
1.1 Safety measures
Measures for your protection
Never work in an environment subject to explosion hazards! The housing of
the instrument is not gas tight (explosion hazard due to spark formation,
corrosion caused by the ingress of gases)
When using chemicals and solvents, comply with the instructions of the
producer and the general lab safety rules
Measures for operational safety
Do not unscrew the two halves of the housing
Dry off any liquid spills immediately! The instrument is not watertight
Exclude the following environmental influences:
- Powerful vibrations
- Direct sunlight
- Atmospheric humidity greater than 80%
- Corrosive gases present
- Temperatures below 5 °C and above 40 °C
- Powerful electric or magnetic fields
3
1.2 Display and controls
Displays
1
Electrode condition
Slope: more than 95%
and offset: ± (0-15) mV
Electrode is in very good
condition
Slope: 90-95%
or offset: ± (15-35) mV
Electrode is in good
condition
Slope: less than 90%
or offset: ± (>35) mV
Electrode needs cleaning or
is defective
2
Endpoint stability / Auto endpoint
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 / Memory number / Error index
9
Auto / Manual temperature compensation (see section 4.4)
10
Temperature during measurement or offset in calibration process
2
3
1
6
7
8
9
10
4
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
- Meter on
- Back to measurement screen
- Meter 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
5
2 Installation
Carefully unpack the meter.
2.1 Package contents
The model ST300-B has the following items:
In addition to ST300-B package content, the model ST300 package also includes the following:
2.2 Installing the batteries
1) Remove the battery cover screw and remove the battery cover
2) Insert the batteries in the battery compartment as shown
3) Replace the battery cover and tighten the battery cover screw
2.3 Installing the electrode clip
ST300-B
Units
STARTER 300 meter
1
AAA battery
4
Electrode Clip
1
IP54 electrode caps
1 set
Wrist Strap
1
pH Buffer Power Set (4.01, 7.00, 10.01)
1 set
ST320 3-in-1 gel pH electrode
1
6
The electrode clip is an electrode holder that can be placed next to the display on either side of
the housing.
1) Attach the clip by inserting the tabs into the recess.
2) Slide the clip forward to lock in position. Slide the shaft of the sensor into the clip from above.
2.4 Installing the IP54 cover
Use the small plastic tool as shown:
2.5 Integrated stand for table top use
One unique design feature of the STARTER 300 meter is the integrated stand as shown, which
can be pushed out to use the meter at the table. To close the stand, please take the mid-edge of
the stand.
7
3 STARTER 300 operation
3.1 Calibration
3.1.1 Buffer group
The STARTER 300 pH meter allows you to perform 1-, 2- or 3- point calibrations. The 4 buffer
group is predefined in the meter, after selecting your calibration buffer group among the 4 group in
the meter(4.4), the buffers are automatically recognized and displayed during calibration (auto
buffer recognition).
The 4 predefined buffer groups are:
b1
1.68
4.01
7.00
10.01
(at 25°C)
b2
2.00
4.01
7.00
9.21
11.00
(at 25°C)
b3
1.68
4.00
6.86
9.18
12.46
(at 25°C)
b4
1.68
4.01
6.86
9.18
(at 25°C)
STARTER 300 pH meters automatically corrects for the temperature dependence of the buffer pH
values given in the table.
Buffer group b1 (ref. 25 °C)
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 Performing 1-point calibration
Place the electrode in a calibration buffer and press Cal. “Cal 1” is blinking during calibration.
The calibration icon and the measurement icon appear on the display. The measurement
icon is blinking during calibration measurement. The meter endpoints according to the preselected
endpoint mode, after the signal has stabilized or after pressing Read.
When the first calibration point is finished, the relevant buffer value is displayed and stored; the
measurement icon blinks 3 times and disappears. Then, the endpoint stability and auto endpoint
icons blink 3 times and freeze on the display and “Cal 1” stops blinking. If the calibration
was endpointed manually, then only endpoint stability icon blinks 3 times and freezes on the
display.
To finish the calibration and return to the sample measurement, press Read. The offset value and
the slope are then shown on the display for 3 seconds. To reject the calibration, press Exit before
the meter returns automatically after 3 seconds to the measurement screen.
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.
8
3.1.3 Performing 2-point calibration
• Step 1: Perform the first calibration as described above in "Performing 1-point calibration".
• Step 2: Rinse the electrode with pure water.
• Step 3: Place the electrode in the next calibration buffer and press Cal
The calibration icon and the measurement icon appear on the display. The measurement
icon is blinking during calibration measurement. The meter endpoints according to the preselected
endpoint mode after the signal has stabilized or after pressing Read.
When the calibration point is finished, the relevant buffer value is displayed and stored; the
measurement icon blinks 3 times and disappears. Then, the endpoint stability and auto endpoint
icons blink 3 times and freeze on the display and “Cal 2” or “Cal 3” stops blinking. If the
calibration was endpointed manually, then only endpoint stability icon blinks 3 times and
freezes on the display.
To finish the calibration and return to the sample measurement, press Read. The offset value and
the slope are then shown on the display for 3 seconds. To reject the calibration, press Exit before
the meter returns automatically after 3 seconds to the measurement screen.
Note:
The use of a temperature sensor or an electrode with a built-in temperature sensor is
recommended. If you use the MTC mode, you should enter the correct temperature value and
keep all buffer and sample solutions at the set temperature. (see 4.2)
To ensure the most accurate pH measurement, you should perform a calibration once a day.
3.2 Sample measurement
3.2.1 pH measurement
Place the electrode in the sample and press Read to start the measurement. The measurement
icon appears on the display. The measurement icon is blinking during measurement and the
display shows the pH value of the sample. The automatic endpoint is the default setting of
the meter. When the signal has stabilized, the sample reading freezes, the measurement icon
blinks 3 times and disappears. Then, the endpoint stability and auto endpoint icons blink 3
times and freeze on the display.
By pressing and holding Read, you can switch between the auto and manual endpoint modes. To
manually endpoint a measurement, press Read: the sample reading freezes, the measurement
icon blinks 3 times and disappears. Then, the endpoint stability icon blinks 3 times and
freezes on the display.
Stability criterion for pH and mV measurement – The signal of the sensor input may not
change by more than 0.1mV in 6 seconds.
3.2.2 mV measurement
To switch to mV mode, press Mode.
To perform a mV measurement, follow the same procedure as for pH measurement.
3.3 Temperature measurement
For better accuracy, we recommend the use of either a built-in or a separate temperature probe. If
9
a temperature probe is used, ATC and the sample temperature are displayed. If the meter does
not detect a temperature probe, it automatically switches to the manual temperature
compensation mode and MTC appears. MTC temperature should be set. (See 4.2, 4.3)
Note:
The meter accepts NTC 30 kΩ temperature sensor.
3.4 Using the memory
3.4.1 Storing a reading
The STARTER 300 pH meter can store up to 30 endpointed results. Press Store when the
measurement has endpointed. M01 indicates that one result has been stored.
If you press Store when M30 is displayed, FUL indicates the memory is full. To store further data
you will have to clear the memory (see below).
3.4.2 Recalling from memory
Press and hold Recall to recall the stored values from memory when the current measurement
has endpointed.
Press up or down buttons to scroll through the stored results. R01 to R30 indicates which result is
being displayed. Press Read to exit.
3.4.3 Clearing the memory
Continue pressing up or down buttons to scroll through the stored results until MRCL appears.
Then press Read, CLr blinks. Press Read again to confirm the deletion or press Exit to return to
the measurement mode without deleting the data.
4 Setup
4.1 Set endpoint mode
The automatic endpoint is the default setting of the meter. By pressing and holding Read,
you can switch between the auto and manual endpoint modes. In auto endpoint mode, press
Read to start the measurement, then the meter judge the endpoint automatically and lock the
endpoint reading.
In manually endpoint mode, you should press Read one more time to confirm the final reading
result: the sample reading freezes, the measurement icon blinks 3 times and disappears. Then,
the endpoint stability icon blinks 3 times and freezes on the display.
Stability criterion for pH and mV measurement – The signal of the sensor input may not
change by more than 0.1mV in 6 seconds.
4.2 Set temperature unit
If the meter does not detect a temperature probe, it automatically switches to the manual
temperature compensation mode and MTC appears.
To set the MTC temperature and the temperature unit, press and hold Mode/Setup until the setup
icon appears on the display and the current temperature unit blinks. Use up or down buttons to
switch between °C and °F . Press Read to confirm your selection. Continue with MTC
temperature setting or press Exit to go back to the measurement screen.
10
4.3 Set manual temperature compensation
After confirming the temperature unit, the MTC temperature appears on the display. Then use up
or down buttons to increase or decrease the value to the temperature of your sample. Press
Read to confirm the setting. Press Exit to leave to setup. The default setting is 25 °C(77°F).
Note: °C = 5/9 (°F -32)
4.4 Selecting a predefined buffer group
After confirming the compensation temperature value, it goes to the buffer group selection. Use
up or down buttons to select a buffer group(3.1.1). Press Read to confirm the setting. Press Exit
to leave to setup. The default buffer group is b1.
b1
1.68
4.01
7.00
10.01
(at 25°C)
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 ... 40 °C)
Keep the standard buffer temperature within the
range for calibration
Error 4
Offset out of range
Make sure the 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
A measurement can only be stored once. Perform
a new measurement to store a new data set.
5.2 Meter maintenance
Never unscrew the two halves of the housing!
The STARTER 300 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.
5.3 Electrode maintenance
Make sure the electrode is filled with electrolyte solution. Always store the electrode according to
the manufacturer’s instructions and do not allow it to dry out.
If the electrode response becomes sluggish or the slope is not good enough, try:
1. Soak the electrode in 0.1M HCl overnight
2. For fat or oil build-up, degrease the membrane with cotton wool soaked in either acetone or a
soap solution
11
After electrode treatment, a new calibration should be performed. If the electrode slope is still not
satisfactory, the electrode might need to be replaced.
5.4 Self diagnosis
Press and hold Read and Cal 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 pressing all five keys within two minutes, otherwise Err 1 appears and you will
have to repeat the procedure.
6 Specifications
STARTER 300
Measuring range
0.00…14.00 pH
–1999…1999 mV
0 °C…100 °C
Resolution
0.01 pH
1 mV
0.1 °C
Error limits
± 0.01 pH
± 1 mV
± 0.5 °C
Calibration
3 points
1 predefined buffer group
Memory
30 measurements
Current calibration
Power supply
4 x AAA
> 500 operating hours
Size/weight
Approximately 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
12
7 Buffer group
STARTER 3000 meter automatically correct for the temperature dependence of the buffer group
(b2, b3, b4) pH value given in the following tables.
Buffer group b2 Europe standards
Temp℃ 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 JJG119
Temp℃ 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 b4 JIS Z 8802
Temp℃ 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
45 1.70 4.05 6.83 9.04
50 1.70 4.06 6.83 9.01
Ohaus Corporation
7 Campus Drive
Suite 310
Parsippany, NJ 07054 USA
Tel: (973) 377-9000
Fax: (973) 944-7177
With offices worldwide.
www.ohaus.com
PN 83033978 © Ohaus Corporation 2011, all rights reserved
*83033978*
*12113777*
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Ohaus STARTER 300 User manual

Ohaus
Brand
Ohaus
Model
STARTER 300
Category
Measuring, testing & control
Type
User manual
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