Manual - Hanna Instruments
®
pH
Dear
Customer
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using this instrument. This
manual will provide you with the necessary information for correct use of this
instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e-mail us at
tech@hannainst.com or view our worldwide contact list for a Hanna
representative near you at www.hannainst.com.
All rights are reserved. Reproduction in whole or in part is prohibited without the
written consent of the copyright owner, Hanna Instruments Inc., Woonsocket,
Rhode Island, 02895 , USA
Table of
Contents
Included ...............................................................................................................................................3
Safety Measures ..............................................................................................................................3
Description .........................................................................................................................................4
Diagram ..........................................................................................................................................4-8
Product Diagram ..................................................................................................................................................................4-5
Probe Diagram .......................................................................................................................................................................... 6
Keypad Function .......................................................................................................................................................................7
Guide to Indicators .................................................................................................................................................................. 8
Setup/Installation ....................................................................................................................9-19
Setting Up edgepH ® ......................................................................................................................................................... 9-10
Electrode & Probe Connections ...................................................................................................................................... 10
General Setup ...................................................................................................................................................................11-12
Basic Mode ............................................................................................................................................................................... 13
Logging Function ........................................................................................................................................................... 13-15
Viewing Logged Data ................................................................................................................................................... 15-17
PC & Storage Interface.................................................................................................................................................18-19
Operational Guide .................................................................................................................20-35
Basic vs Standard pH Mode...............................................................................................................................................20
pH Meter Configurations .................................................................................................................................................... 21
pH Calibration ..................................................................................................................................................................21-27
Calibration Messages................................................................................................................................................... 27-29
pH GLP Information ...................................................................................................................................................... 29-30
pH Measurement............................................................................................................................................................31-32
Relative mV Calibration................................................................................................................................................32-33
Relative mV GLP Information ................................................................................................................................... 33-34
Relative mV Measurement ................................................................................................................................................35
Maintenance........................................................................................................................... 36-39
pH Probe Maintenance ...............................................................................................................................................36-38
ORP Probe Maintenance.............................................................................................................................................38-39
Troubleshooting Guide .......................................................................................................................................................39
Specifications ................................................................................................................................40
Accessories ..............................................................................................................................41-42
Warranty ..........................................................................................................................................43
2
Remove the instrument & accessories from the packaging and verify damage
has not occurred during shipping. Remove protective film from meter. Notify
your nearest Hanna Customer Service Center if damage is observed.
Included
Each instrument is supplied with:
edgepH ® (HI 2002)
Bench cradle
Wall cradle
Electrode holder
USB cable
5 Vdc Power Adapter
Instruction Manual
Quality Certificate
HI 11310: Digital pH Electrode with integrated temperature sensor
pH 4.01, 7.01 & 10.01 Buffer Sachets
HI 700601 General Purpose Cleaning Solution
Note: Save all packing material until you are sure that the instrument works
correctly. Any defective item must be returned in its original packing.
Before using this product, make sure that it is entirely suitable for your specific
application and for the environment in which it is used.
Safety
Measures
Operation of this instrument may cause interference to other electronic
equipment, requiring the operator to take steps to correct interference. Any
variation introduced by the user to the supplied equipment may degrade the
instrument’s EMC performance.
To avoid damages or burns, do not put the instrument in microwave ovens.
For your and the instrument’s safety, do not use or store the instrument in
hazardous environments.
3
Description
edgepH ® enables the user to make fast, accurate measurements of commonly
measured laboratory parameters using the Hanna edgepH ® digital sensors for
pH. Each digital sensors has a unique serial numbe. Once connected to the meter,
the sensor(s) are ready to measure their parameter along with temperature.
The user interface permits you to adapt edgepH ® to your exact measurement
requirements. The intuitive design simplifies configuration, calibration,
measurement, data logging and transfer of data to a USB thumb drive or
computer. edgepH ® also offers a basic operation mode that streamlines
measurement configuration and is useful for many routine applications. (Every
feature and measurement detail is designed to give you an edge in measurement
technology.)
edgepH ® is versatile in many ways. The slim meter and probe can be used as
a portable device (using its rechargeable battery) or used in its bench or wall
cradles (that also power the meter) as a line-powered laboratory instrument.
Diagram
Product
Diagram
Side & Back
View
4
Diagram
•
•
•
•
•
•
•
•
•
Sleek, clean, intuitive design
Internal clock and date
Adjustable resolution
Auto parameter recognition
Dedicated GLP key
GLP data included with logged data
Basic mode for simplified operation
Simplified data transfer to a PC
Up to 8 hour battery life when used as a portable device
Product
Diagram
1.
2.
3.
4.
Liquid Crystal Display (LCD)
Capacitive Touch Keypad
3 mm jack input for edgepH ®
digital probes
Top mounted ON/OFF button
5.
6.
Micro USB device connection for
power or PC interface
Standard USB host connection
for data transfer to a USB
thumb-drive
Diagram
5
Probe
Diagram
Probe
pH Electrode
•
•
•
•
•
•
•
6
Diagram
Probes process signal directly for noise free measurements
Auto sensor recognition
Store calibration specific data from the last calibration
Are built with materials suitable for use in chemical analysis
Have integrated temperature measurement
Incorporate a 3 mm jack termination
Unique serial ID in every probe for traceability
Keypad
Function
1. CAL/MODIFY - Used to enter
and exit calibration mode. In
SETUP, used to initiate changes of a
configuration setting.
5.
/
- Used to scroll through
SETUP menu. Used to change
selection
when
modifying
a
parameter in SETUP.
2. GLP/CFM - Used to display GLP
calibration information. In SETUP,
used to confirm change made. In
calibration, used to accept calibration
points.
6. RCL (Recall) - Used to view
logged records or view % log memory
used.
3. RANGE/u - Used to select
measurement range. In SETUP, used
to move to right in pick list. In log RCL,
used to view GLP data for a data point.
4. SETUP/CLR - Used to enter/exit
SETUP mode. During calibration, used
to clear previous calibration data. In
log RCL, used to clear log records.
7. LOG - Used to log data by
manual log on demand or manual log
on stability or to start/stop interval
logging.
Note: You can increase/
decrease the speed to
change the value of a
parameter.
Proceed as follows:
Press and hold down the
p or q key, then slide the
finger toward the double
apex to increase the speed
that a value changes.
Diagram
7
Guide to
Indicators
1.
2.
3.
4.
5.
6.
7.
8.
Mode tags
Confirm tag
USB connection status
pH electrode diagnostics
Probes symbol
Battery symbol
Arrow tags, displayed when they
are available
pH calibration buffers used
9. Third LCD line, message area
10. Labels
11. Second LCD line, temperature
measurement
12. Temperature units
13. Temp. Compensation status
14. Measurement line
15. Measurement units
16. Stability Indicator
The third line of the LCD (9) is a dedicated message line. During measurement
the user may use the pq arrows to select desired message. Options include
date, time, calibration data, battery charge or no message. If a measurement
error or log status change occurs during measurement, the third line will display
a pertinent message.
8
Diagram
The main operating modes of edgepH ® are setup, calibration, measurement,
data logging, and data export. Follow this general outline of steps to get you
started. The following topics are expanded upon in the sections that follow in
this manual.
Setup/
Installation
1.
2.
Setting Up
edgepH ®
3.
4.
5.
6.
Familiarize yourself with the design features of this unique meter.
Decide how the meter will be used and set up the wall or bench cradle in a
clean area near line power.
Turn edgepH ® on using the ON/OFF button located on the top of the meter.
Plug in the probe required for measurement.
SETUP the measurement parameters required for the measurement you
will be making.
Calibrate the sensor/probe.
You are now ready for measurements.
Bench Cradle Setup
Insert electrode holder arm into the post
on the pivoting base.
Connect the probe connector to the
socket located at the bottom of the
instrument.
Slide edgepH ® into the cradle while
positioning the probe cable behind the
cradle. Put the probe/sensor into the
electrode holder and secure cable in
clips.
Connect the power adapter cable to the
rear socket of the bench cradle. Connect
the other end to the power adapter and
plug into line power. Verify the battery
icon indicates charging.
Wall Cradle Setup
Choose suitable wall location. (Use 2.5
mm or US #3 bit). Fasten the wall cradle
using the provided screws. Snap cover
over screw heads.
Setup/Installation
9
Setting Up
edgepH ®
Connect the power adapter cable to the
bottom socket of the wall cradle. Connect
the other end to the power adapter and
plug into line power.
Connect the 3mm probe jack to the socket
located at the bottom of edgepH ®.
Slide edgepH ® into the wall cradle. Verify
the battery icon indicates charging.
Power Connection
Alternatively to using the cradle for
power, edgepH ® can be powered by micro
USB socket at the top. Plug the 5 VDC
adapter into the power supply socket or by
connecting directly to a PC.
Note: edgepH ® is supplied with a
rechargeable battery inside, which
provides about 8 hours of continuous use.
Whenever edgepH ® is connected to the
power adapter or to a PC, the battery is
charging
Electrode
& Probe
Connections
Connect the 3mm probe jack to the probe
input located on the bottom of edgepH ®.
Make sure the probe is completely
connected. If the probe is recognized,
“CONNECTING” message is displayed along
with sensor model.
If the probe is not connected or not
recognized, “NO PROBE” message is
displayed.
10
Setup/Installation
The following General Setup options are displayed regardless of the sensor
being used. These settings remain when switching to another probe type or
when no probe is attached. Options are tabulated in the table below with choices
and default values. Options are accessed by pressing SETUP. Loop through the
options by using the pq arrows. To modify a setting, press MODIFY. The option
may be modified by using u, p and q keys. Press CFM to confirm the change. To
exit SETUP press SETUP.
Option
*Only seen
when cable
connection
between micro
USB and PC is
made.
Description
Choices
Select if PC is
being used for
charging battery
(and meter
will be used
for logging) or
if Data will be
exported to
the PC.
LOG ON EDGE or
EXPORT TO PC
Default
General
Setup
Basic mode
LOG ON EDGE
Available
Interval
(5 Sec)
Manual log
or
Stability log:
Medium
7 days
Not available
Select log type
to be used
from 3 types of
logging:
Log
Manual log on
demand
Manual Log
Manual log
on stability
(3 types of
stability criteria
available)
Stability Log:
Fast, Medium,
Accurate;
Timed interval
lot logging
Interval Log:
Seconds: 5, 10,
30; Interval Log
Minutes: 1, 2, 5,
15, 30, 60, 120,
180.
Set Calibration
Expiration
Warning
Meter will
indicate “CAL
DUE” when
set time in this
parameter has
been exceeded.
Probe Specific
Parameters that are specific to a measurement type are inserted here in
the SETUP list.
Set Date
Press MODIFY
key to Set current
date, displayed
in ISO format.
Press CFM to save
changes.
YYYY/MM/DD
Date
Set date
Available
Set Time
Press MODIFY
key to Set current
time, displayed
in ISO format.
Press CFM to save
changes.
24hr:MM:SS
Time
Set time
Available
1, 2, 3, 4, 5, 6, 7
days or OFF
Setup/Installation
11
General
Setup
Option
Description
Choices
Default
Set Auto Off
Used to save
battery life by
automatically
turning off when
no key press is
detected for
time set and
meter is not in
active logging or
calibration mode.
5, 10, 30, 60
Min
or Off
10 MIN
Available
Sound
If enabled, a
short audible
tone is produced
for key stroke
or calibration
confirmation and
a longer tone for
wrong key.
On or Off
On
Available
Temperature
Unit
Select degree
Celsius or
Fahrenheit scale
for displayed
and logged
temperatures.
ºC or ºF
ºC
Available
LCD Contrast
Permits
modification
of the display
contrast for
various lighting
conditions.
1 to 8
3
Available
Flash Format*
Only seen when
log errors are
present.
Permits
formatting the
flash drive.
On or Off
OFF
Available
Message
Transition
User may choose
how messages
are displayed on
third LCD line of
display.
Word scroll
messages or
letter scroll
messages
Letter scroll
messages
Available
Reset Config To
Default
Press the MODIFY key and CFM (when prompted) to
reset parameters.
Available:
RESETS with
Basic Mode OFF.
Instrument
Firmware/ Probe
Firmware
Displays firmware
version of meter.
Using the u
key switches to
Probe firmware
(if connected)
and diagnostic
made for
troubleshooting.
View only
Current
firmware
version.
Available
Meter ID/
Meter SN/
Probe SN
User ID and
Serial Number of
meter and probe
(if connected).
Use u to
change between
the three
parameters.
Meter ID is user
selectable
0000/ Serial
Number
Available
*Note: Options that are seen under special conditions only.
12
Basic mode
Setup/Installation
edgepH ® offers a basic operation mode that streamlines measurement
configuration for pH measurements and is useful for many routine applications.
Basic pH SETUP reduces parameter selection to the basic set. The meter limits
calibration to 5 standard pH buffers; 6.86, 7.01, 4.01, 9.18 and 10.01 buffers. All
pH measurements will display, log and export with 0.01 pH resolution. Interval
logging is also eliminated. Manual and Manual medium stability log on demand
are still functional. pH CONDITION, RESPONSE graphs are not displayed, giving
the display a “Basic” measurement screen with just pH data and temperature.
Basic Mode
Note:
•
If powering edgepH ® through the micro USB connector to a PC, a SETUP
option will require the choice “LOG ON EDGE” or “EXPORT TO PC“.
•
1000 log records can be stored into edgepH ® memory. This memory is
shared between all measurement types (pH, ORP) and all logging types
(Manual, Manual Stability, Interval logs).
•
The maximum number of records for an Interval lot is 600 records (provided
log space is available).
•
A record is a stored reading and a lot is a group of records.
Logging
Function
Each time an Interval log is initiated, a new lot is
created. The maximum number of Interval lots that
may be stored is 100. If a 101st lot is attempted, “MAX
LOTS” will be displayed. Some lots will need to be
deleted. The lot numbering is up to 999 and restarts if
all lot logs are deleted. All log on demand and stability
log on demand are stored in a single lot. The maximum
number of records that may be stored in a Manual or
Stability lot is 200 records.
If the log memory is full during any logging session,
the “LOG FULL“ message will be displayed on the
third LCD line for a brief moment and logging will
cease. The display will return to the measurement
screen.
Logging type is configured in SETUP.
Types of Logging
Interval logging: A continuous log recorded using a user-selected timed period.
(This is not available in Basic mode).
Manual log on demand: Readings are logged each time LOG key is pressed. All
of the records are stored in a single Manual lot for the measurement type. New
records made on different days are stored in the same Manual lot.
Manual Stability log on demand: A log on demand that is made each time LOG
key is pressed and the stability criteria is reached. Stability criteria may be set to
Fast, Medium or Accurate settings.
Setup/Installation
13
Logging
Function
In Setup mode, choose log parameter, press MODIFY then use the u arrow to
select between Interval, Manual, or Stability. When Interval is displayed, use the
p and q arrows to select the setting for the timed interval. When Stability is
displayed, use the p and q to select the measurement stability setting.
A complete set of GLP information including date, time, range selection,
temperature reading, calibration information and probe serial number is stored
with each log made.
Interval Logging
Select Interval and sampling period in the SETUP menu (Not available in Basic
mode). To start Interval logging, press the LOG key while the instrument is in
measurement mode.
A “PLEASE WAIT” message will be displayed followed
by the number of free spaces. During active interval
logging, lot information is displayed on the third
LCD line. The line indicates in which lot the data will
be placed and keeps track of the number of logged
records taken. The “LOG“ tag is continuously on during
active logging.
Pressing u during an interval log will display the
number of logs available.
Pressing the LOG key again will stop the Interval
logging session. The “LOG STOPPED“ message will be
displayed for a few seconds.
If a sensor failure occurs during interval logging, the
message “OUT OF SPEC.” will alternate with logging
information.
Manual Logging
Select Manual in the SETUP menu. To initiate a
Manual log, press the LOG key while the instrument
is in measurement. The “PLEASE WAIT” screen will
be displayed briefly followed by a screen indicating
the measurement has been saved and then a screen
indicating the log record number.
The “LOG” tag will be displayed on all 3 screens.
“PLEASE WAIT”
“SAVED” with the log record number
“FREE” with the number of free spaces available
14
Setup/Installation
Stability Logging
Select Stability and choose measurement stability
criteria in the SETUP menu. Only Stability Medium
is available in Basic mode. To initiate the Stability
log, press the LOG key while the instrument is in
measurement.
Logging
Function
The “PLEASE WAIT” screen will be displayed briefly
followed by a screen showing the stability tag, “LOG”
tag and a “WAITING” message. The log can be stopped
while the “WAITING” message is displayed by pressing
LOG again.
When the stability selected criteria has been met,
a “SAVED” message will be displayed followed by a
screen indicating how much log space is available. The
“LOG” tag will be displayed on all 4 screens.
“PLEASE WAIT”
“WAITING”
“SAVED” with the log record number
“FREE” with the number of free spaces available
All log records stored on edgepH ® may be viewed on the meter by pressing the
RCL key. The log records are grouped according to measurement (pH, ORP).
Viewing
Logged
Data
The parameter displayed first is based on the probe/
sensor connected. The display also indicates the
percentage of log memory used. Press CFM to display
those logs.
Choices are:
•
Manual log on demand lot,
•
Manual log on stability lot,
•
Individual Interval logging lots.
If no data was logged for the selected measurement
range, the instrument displays the following messages
(ex. for pH range):
“NO MANUAL LOGS”
“NO STABILITY LOGS”
Setup/Installation
15
Viewing
Logged
Data
Press CFM to enter inside lot information to view recorded data.
Use the ARROW keys to toggle between different records.
Use u to display GLP data including calibration information, date, time, etc.
Press CLR then CFM when deleting records or lots.
Press RCL to exit the logging type.
Press RCL to exit the parameter selection screen.
Press RCL to return to the measurement screen.
Delete Logging Type/Lot
Press RCL and select the parameter log.
Use the pq keys to select the Manual/Stability
records or Interval lots to delete. Press CLR. The
instrument will display “CLEAR MANUAL” for Manual
Records, “CLEAR STAB” for Stability Records.
For Interval lots, the message “CLEAR”, followed by the
selected lot will be displayed with “CFM” tag blinking.
Press the pq keys to select a different lot. Press CFM.
The instrument will display “PLEASE WAIT”.
“CLEAR DONE” is displayed for a few seconds after the
selected Interval lot is deleted.
Delete Records (Manual and Stability log on demand)
To delete individual records (Manual and Stability logs only), enter Manual
(Stability) log by pressing CFM when Manual (Stability) is displayed. Use the
ARROW keys to select the record to be deleted and then press CLR.
The instrument will display “CLEAR REC.“ and record
number along with “CFM” tag blinking. Use the ARROW
keys to select another record if necessary.
Press CFM. The instrument will display “PLEASE WAIT” and then “CLEAR
DONE” message. When individual logs are deleted within saved MANUAL or
STABILITY logs, the logs will renumber, filling in the deleted data but staying in
chronological order.
To delete all records of the MANUAL (STABILITY) log, proceed as described on
page 16 for LOTS.
16
Setup/Installation
Select the Manual (Stability) lot and press CLR.
The ”CLEAR” message will be displayed along with
”MANUAL” or “STABILITY” and CFM tag blinking on
the LCD. Press the CFM key to confirm the deleting of
the selected lot (MANUAL or STABILITY) or all records.
Press CLR to exit without deleting.
Viewing
Logged
Data
The lot number is used to identify particular sets of data. The lot numbers
are allocated successively until 100, even if some lots were deleted. The total
number of lots that can be saved is 100. If some are deleted (for example 1-50),
fifty additional logs may be stored. These will be numbered 101-150. The lots are
allocated successively (provided available memory space) until 999 is reached.
After this, it is necessary to delete all the LOT logs to start over the numbering.
Delete All
All pH logs, (or all ORP logs) may be deleted in a single clear. This function will
delete all MANUAL, STABILITY and INTERVAL logs.
Press the RCL key. pH will be blinking. Use u to select
desired measurement parameter log data to delete.
(pH or ORP)
While the measurement type is blinking and message
states “LOG RECALL”, press CLR.
“CLEAR ALL” and measurement type will be displayed
with “CFM” tag blinking. Press CFM.
“PLEASE WAIT” and the percent cleared will be
displayed until completed.
Note: If CLR is pressed in error, press CLR again to exit
without deleting.
Setup/Installation
17
PC & Storage
Interface
Logged data on edgepH ® can be transferred from the meter to a USB flash drive
by using the log recall function. The minimum requirement for the drive is USB
2.0. Select the pH record you wish to export and follow the simple steps below.
Connect USB flash drive to the USB port, located on
the top of the meter. Press the RCL key. Select Manual,
Stability, or interval lots by using the pq keys. Press
the LOG key (not CFM). The “USB HOST” tag should
come on.
“PLEASE WAIT” message appears followed by
“EXPORT”. Press CFM to export the selected record or
lot. If CFM is not pressed in 10 seconds, the USB host
will become inactive.
The meter will display the percentage of export.
The export percentage should go to 100%. Remove
USB flash drive.
If the selected file is already saved on the flash drive,
edgepH ® will ask for confirmation of overwriting the
existing file. The message “OVERWRITE’ and “CFM”
tag will blink. Press CFM for overwriting the existing
file or CAL to exit without exporting.
After exporting the display will return to the
selected file. Press the RCL key twice to return to
measurements.
Note: Do not remove USB flash drive during an active export transfer.
18
Setup/Installation
Logged data on the edgepH ® can be transferred from the meter to a PC by
following these simple directions. Suitable operating systems include Windows
(Xp minimum), OS X or Linux.
1.
2.
3.
4.
5.
6.
PC & Storage
Interface
Connect edgepH ® to the PC using the supplied micro USB cable.
Turn on edgepH ®.
Press SETUP and select “LOG ON EDGE”
Press MODIFY then use pq keys to change to “EXPORT TO USB”
Press CFM and the USB/PC Tag is displayed.
Press SETUP to exit
The PC should detect the USB as a removable drive. Open the drive to view the
stored files. Log files are formatted as Comma separated values (*.CSV) and can
be opened with any text editor or spreadsheet program.
Note:
•
Western Europe (ISO-88859-1) character set and English language are
suggested settings.
•
Other files may be visible depending upon computer settings. All files
stored will appear in this folder.
•
Adjust Font or column width appropriately. Adjust the decimal places if the
pH was logged with 0.001 resolution.
Interval logs are designated as pH or mV Lots. ie. PHLOT001, MVLOT002.
The Manual Lots are PHLOTMAN for pH and MVLOTMAN for ORP.
The Stability Lots are PHLOTSTAB for pH and MVLOTSTAB for ORP. All stability
logs, regardless of stability setting, are located in the same stability file for that
measurement.
Click on the desired log to view data.
Note:
•
If “ºC !” appeared in log data, the electrode/probe was used beyond it’s
operation specifications and the data is not considered reliable.
•
If “ºC !!” appeared in log data, the temperature sensor within the probe or
electrode is broken and the device should be replaced. Logged data should
not be considered reliable.
Setup/Installation
19
Operational
Guide
Basic vs
Standard
pH Mode
For optimum pH measurements, follow these steps:
1.
Understand the benefits and features of Standard and Basic Operation.
2. Set up edgepH ® meter by configuring preferences.
3. Calibration
4. Measurement
The “Standard” pH operation includes up to a 5-point buffer calibration, use
of custom buffers, choice of displaying 0.001 pH resolution, use of the full
diagnostic features of Calibration Check™ (that includes buffers used, probe
condition, response time and messages indicating a contaminated buffer or pH
sensor requiring maintenance during calibration). Additional Sensor Check™
indicators are available if using HI11311 or HI12301 pH electrodes. These
include a continuous diagnostic to detect if the electrode is broken and at the
time of calibration, a diagnostic to indicate the reference junction has been
compromised or fouled by sample contamination. The Standard pH operation
also includes full logging capability including Interval, Manual log on demand
and Manual log on stability.
“Basic” pH operation provides a simplified SETUP menu; there are no decisions
to make regarding the pH measurement itself. The meter will display 0.01 pH
resolution and permit a 3-point buffer calibration from the following pH buffers;
4.01, 6.86, 7.01, 9.18 or 10.01. Calibration Check™ and Sensor Check™ features
are limited to messages during calibration. Calibration reminders are also not
available. The GLP will still provide offset, slope, buffers used and a calibration
date. The Basic pH operation includes Manual log on demand and Manual log on
stability (medium setting).
Note: When changing from Standard to Basic operation in SETUP, previous
calibration data will be cleared. A prompt will force the user to facilitate this.
Major differences between Standard and Basic modes are shown below.
Calibration
Diagnostics
Log types
Recommended pH electrodes:
Standard
Basic*
5 points including 2 custom
buffers
3 points
Cal Check™ Feature
Sensor Check™ Feature
Error messages
GLP
Manual Log on demand
Manual Log on stability
(Fast, Medium, Accurate)
Interval Logging
HI 11310, HI 12300
HI 11311, HI 12301
HI 10530, HI 10430
Basic error messages
GLP basic
Manual Log on demand
Manual Log on stability
(Medium)
HI 11310*
HI 12300
* All Sensors work in this mode, but diagnostic and all buffers will not be
available.
20
Operational Guide
edge’s pH meter operation is configured by using the SETUP key with a pH probe
connected to the meter. The parameter-specific options will be seen inserted
into the menu. If Basic mode is “On”, the pH parameter list will not be displayed.
See Basic mode for a description of this operation before choosing how to
SETUP the meter.
Option
Description
Choices
Default
pH Meter
Configurations
Basic mode
Basic Mode
When “On”, a limited set of
parameters and calibration
buffers are available for
use.
Off or
On
Off
Available
Information
Visual indication of buffers
used, Probe Condition
and Response times are
determined and displayed
when calibration uses 7 and
4 and/or 10 pH buffers.
Off or
On
On
Buffers used, probe
conditions, and
response times are
not displayed.
First Custom
Buffer
When “On”, it permits the
user to enter a custom pH
buffer value to use during
electrode calibration.
Off or
value
Off
Not Available
Second
Custom Buffer
When “On”, it permits the
user to enter a custom pH
buffer value to use during
electrode calibration.
Off or
value
Off
Not Available
First
Calibration
Point
Allows the user to choose
how the first point in
calibration will be made.
Offset
or point
Offset
Not Available
(automatically uses
Offset).
Resolution
Allows the user to select
between 0.01 and 0.001 pH
resolution.
0.01 or
0.001
pH
0.01 pH
Not Available
(automatically uses
0.01 pH resolution).
Set Out Of
Calibration
Range
When set to “On”, a
measurement that is
outside the calibrated
range (buffers used) will
trigger a warning message.
Off or
On
On
Not Available, No
Error messages
displayed.
Calibration in Standard Mode
pH operation in standard mode offers full function of edgepH ®. This includes
seven standard buffers and two custom ones. Five pH buffers may be used for
calibration.
pH
Calibration
The instrument should be recalibrated whenever:
•
High accuracy and sensor verification are required.
•
The pH electrode is replaced.
•
At least once a week.
•
After testing aggressive chemicals.
•
If ”CAL DUE” is displayed on the third LCD line.
Every time you calibrate the instrument use fresh buffers and perform electrode
maintenance as required. It is advised to choose calibration buffers that bracket
the sample pH.
Operational Guide
21
pH
Calibration
Preparation
Pour small quantities of the buffer solutions into clean beakers. If possible,
use plastic to minimize any EMC interferences. For accurate calibration and to
minimize cross-contamination, use two beakers for each buffer solution; one
for rinsing the electrode and one for calibration. If you are measuring in the
acidic range, use pH 7.01 or 6.86 as the first buffer and pH 4.01 (or 3.00*) as the
second buffer. If you are measuring in the alkaline range, use pH 7.01 or 6.86 as
first buffer and pH 10.01 or 9.18 as the second buffer.
* pH 3.00 is only visible when using specific pH electrodes and will replace 4.01
pH buffer.
Procedure
Calibration can be performed using up to five calibration buffers. For accurate
measurements, a minimum of a three-point calibration is recommended. The
calibration buffer can be selected from the calibration buffer list that includes
the custom buffers and the standard buffers:
pH 1.68, 4.01 (pH 3.00), 6.86, 7.01, 9.18, 10.01 and 12.45.
The custom buffers allow the user to calibrate in a buffer solution different from
a standard one. Two custom buffers can be set in SETUP menu. See page 23 for
more information about using custom buffers.
The instrument will automatically skip custom buffers which are in a ±0.2 pH
window of an already calibrated buffer.
Submerse the pH electrode approximately 3 cm (1¼”) into a buffer solution and
stir gently. Press CAL to enter calibration.
The “CAL” tag will appear and the “7.01” buffer will be
displayed on the third LCD line. If necessary, press the
ARROW keys to select a different buffer value. The “ ”
along with “STIR” tag will be displayed and “WAIT” will
blink on the LCD until the reading is stable.
When the reading is stable and close to the selected
buffer, “CFM” tag will blink. Press CFM to confirm
calibration.
After confirming the first point, the calibrated value
will be displayed on the first LCD line and the second
expected buffer value on the third LCD line (i.e. pH
4.01).
22
Operational Guide
Rinse and submerse the pH electrode approximately 3 cm (1¼”) into the second
buffer solution and stir gently. If necessary, press the ARROW keys to select a
different buffer value.
pH
Calibration
The “ ” along with “STIR” tag will be displayed and “WAIT” will blink on the LCD
until the reading is stable.
When the reading is stable and close to the selected buffer, “CFM” tag will blink.
Press CFM to confirm calibration.
Repeat procedure with additional pH buffers. A total of five pH buffers can be
utilized.
After confirming the last desired buffer calibration
points, press CAL (or if all five buffer values were
calibrated) the instrument will automatically display
“SAVING” as it stores information. It will then return to
normal measurement mode.
Each time a buffer is confirmed, the new calibration
data replaces the old data for the corresponding
buffer or for any buffer in the proximity of ±0.2 pH.
If current buffer has no previous data stored and the
calibration is not full (five buffers), the current buffer
is added to the existing calibration. If the existing
calibration is full, the instrument asks which buffer to
replace.
Press the ARROW keys to select another buffer to be replaced.
Press CFM to confirm the buffer that will be replaced.
Press CAL to leave calibration without replacing.
Note: If the replaced buffer is outside the ±0.2 pH window of the calibrated
buffers, it is possible to select this buffer during the next calibration.
Working With Custom Buffers
If a custom buffer was set in SETUP menu, it can be selected during calibration
by pressing the ARROW keys. The “C1” or “C2” tag will be displayed once selected.
Press u if you want to modify the custom buffer
value. The buffer value will start blinking.
Use the ARROW keys to change the buffer value. After
5 seconds, the buffer value is updated. Press u if you
want to change it again.
Operational Guide
23
pH
Calibration
Note: Custom buffer values can be adjusted ±1.00 pH around the set
value during calibration. When a custom buffer is displayed, the “C1” or “C2”
tag is displayed.
First Calibration Point
When performing a new calibration, or adding to an existing one, the user has
a choice of how the first new calibration point will be treated in reference to
the existing calibration point. This is selected in SETUP by the option FIRST
CALIBRATION POINT. The two SETUP selectable options are “POINT” or “OFFSET”.
Point: A buffer value can be recalibrated and added to the previous calibration
set. The electrode slope of the other calibration points will be reevaluated with
the recalibrated buffer value.
Offset: The new buffer calibration point can create a constant offset to all
existing pH calibration data (existing calibration must have a minimum of two
pH buffers)
.
Recalibrating a pH sensor or adding to an existing calibration is simple and
follows the PROCEDURE outlined on page 22.
Press CAL. Place sensor in desired buffer and select buffer from choices. When
sensor has equilibrated, the CFM tag will turn on and blink. Press the CFM key.
Press CAL to escape the calibration. Alternately continue calibrating in
additional buffers. The latest calibration point will be added to the existing data.
GLP will reflect the latest calibration data. Older calibration buffers will be seen
as blinking buffers.
Note: Each time a buffer is confirmed, the new
calibration data replaces the old data for the
corresponding buffer or for any buffer in the proximity
of ±0.2 pH. If the current buffer has no previous data
stored and the calibration has not used five buffers,
the current buffer is added to the existing calibration.
If the existing calibration is full, the instrument asks
which buffer to replace.
Note: When using Standard mode, the user can choose if they want the display
to show the CONDITION and RESPONSE gauges on the display. These are part of
the Cal Check™ system and are selected in SETUP by the option INFORMATION.
The choice is ON or OFF.
Electrode Condition and Electrode Response Time
edgepH ® pH Calibration Check™ feature will assess electrode condition and
response time during each calibration and display it for the rest of the day.
The condition gauge shows the electrode’s condition that is based on the offset
and slope characteristics of the pH electrode at the time of calibration. The
response gauge is a function of the stabilization time between the first and
second calibration buffers, when calibration is performed between a pair of
4.01, 7.01, or 10.01 buffers. These gauges reflect the electrode’s performance
and should be expected to slowly decrease over the life of the electrode .
24
Operational Guide
pH
Calibration
If the instrument is not calibrated the calibration history has been deleted, or it
has been calibrated only at one point, the electrode condition and the electrode
response gauges will be empty.
For a continuous display of the electrode’s condition and response, daily
calibration is necessary. This information can also be viewed in the GLP data.
Junction Condition (HI11311 and HI12301 Only)
edge’s pH Sensor Check™ feature assess the health of the pH electrode’s
reference junction during each calibration. The junction gauge may be viewed
directly in GLP but will also blink a warning on the display if the junction is
compromised (not 100%). Should this happen, the junction condition will
appear on the display with the junction blinking. The Junction Condition is a
function of the electrode’s reference impedance which should be kept low. If the
reference junction becomes fouled from a precipitate or coating, the impedance
will rise and cause the pH measurement to drift. This diagnostic feature serves
as a warning to clean the sensor.
Calibration in Basic Mode
Procedure
Basic mode operation permits up to three-point buffer calibration.
For accurate measurements, at least a two-point calibration is recommended.
However, a single point calibration can also be used.
The calibration buffers can be selected from the calibration buffer list that
includes the standard buffers, pH 4.01, 6.86, 7.01, 9.18 and 10.01.
Three-Point Calibration
Submerse the pH electrode approximately 3 cm (1¼”) into a buffer solution and
stir gently. Press CAL. The “CAL” tag will appear and the “7.01” buffer will be
displayed on the third LCD line. If necessary, press the
ARROW keys to select a different buffer value.
The “ ” along with “STIR” tag will be displayed and
“WAIT” will blink on the LCD until the reading is stable.
Operational Guide
25
pH
Calibration
When the reading is stable and close to the selected
buffer, the “CFM” tag will blink. Press CFM to confirm
calibration.
After confirming the first calibration point, the
calibrated value will be displayed on the first LCD line
and the second expected buffer value on the third LCD
line. (i.e. pH 4.01)
Rinse and submerse the pH electrode approximately
3 cm (1¼”) into the second buffer solution and stir
gently.
If necessary, press the ARROW keys to select a different buffer value.
The “ ” along with “STIR” tag will be displayed and “WAIT” will blink on the LCD
until the reading is stable. When the reading is stable and close to the selected
buffer, the “CFM” tag will blink. Press CFM to confirm calibration.
The calibrated value is then displayed on the first LCD line and the third expected
buffer value on the third LCD line.
After the second calibration point is confirmed, rinse and submerse the pH
electrode approximately 3 cm (1¼”) into the last buffer solution and stir gently.
If necessary, press the ARROW keys to select a different buffer value.
The “ ” along with “STIR” tag will be displayed and “WAIT” will blink on the LCD
until the reading is stable.
When the reading is stable and close to the selected buffer, the “CFM” tag will
blink. Press CFM to confirm calibration.
At the end of calibration the instrument displays “SAVING”, stores the calibration
value and returns to normal measurement mode.
The calibration sequence may be reduced to two buffer values or a single one.
Press CAL to return to measurement mode after the desired number of buffers
have been calibrated.
Note:
•
When performing a new calibration or adding to an existing calibration the
first calibration point will be treated as an offset. See page 24 for details.
•
Press CAL after the first or second calibration point are confirmed and
the instrument will store the calibration data. Then it will return to
measurement mode.
•
If the value measured by the instrument is not close to the selected buffer,
“WRONG BUFFER” will blink. Check if the correct buffer has been used,
or clean the electrode by following the Cleaning Procedure. If necessary,
change the buffer or the electrode.
26
Operational Guide
•
If the buffer temperature exceeds the temperature limits of the buffer,
“WRONG BUFFER TEMPERATURE” will be displayed.
Press CLR after entering calibration to clear all calibration options.
“CLEAR ALL” message will be displayed and the instrument will return to
measurement mode displaying “CAL DUE” message.
•
pH
Calibration
pH Buffer Temperature Dependence
Temperature has an effect on pH. The calibration buffer solutions are affected by
temperature changes also. During calibration the instrument will automatically
calibrate to the pH value corresponding to the temperature. During calibration
the instrument will display the pH buffer value at 25 ºC.
TEMP
ºC
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
ºF
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
167
176
185
194
203
pH BUFFERS
1.679
1.670
1.670
1.671
1.673
1.675
1.679
1.683
1.688
1.693
1.700
1.707
1.715
1.724
1.734
1.744
1.755
1.767
1.780
1.793
1.807
3.000
3.072
3.051
3.033
3.019
3.008
3.000
2.995
2.991
2.990
2.990
2.991
2.993
2.995
2.998
3.000
3.002
3.003
3.002
3.000
2.996
4.010
4.007
4.002
4.000
4.001
4.004
4.010
4.017
4.026
4.037
4.049
4.062
4.076
4.091
4.107
4.123
4.139
4.156
4.172
4.187
4.202
6.862
6.982
6.949
6.921
6.897
6.878
6.862
6.851
6.842
6.837
6.834
6.834
6.836
6.839
6.844
6.850
6.857
6.865
6.873
6.880
6.888
7.010
7.130
7.098
7.070
7.046
7.027
7.010
6.998
6.989
6.983
6.979
6.978
6.979
6.982
6.987
6.993
7.001
7.010
7.019
7.029
7.040
9.177
9.459
9.391
9.328
9.273
9.222
9.177
9.137
9.108
9.069
9.040
9.014
8.990
8.969
8.948
8.929
8.910
8.891
8.871
8.851
8.829
10.010
10.316
10.245
10.180
10.118
10.062
10.010
9.962
9.919
9.881
9.847
9.817
9.793
9.773
9.757
9.746
9.740
9.738
9.740
9.748
9.759
12.454
13.379
13.178
12.985
12.799
12.621
12.450
12.286
12.128
11.978
11.834
11.697
11.566
11.442
11.323
11.211
11.104
11.003
10.908
10.819
10.734
The Calibration Check™ feature may flag diagnostic messages during a
calibration. As electrode aging is normally a slow process, substantial changes
from previous calibrations are likely due to a temporary problem with the
electrode or buffers that can be addressed easily. These messages are seen in
Standard and Basic modes.
Calibration
Messages
Wrong Buffer
This message appears when the difference between
the pH reading and the value of the selected buffer
is too great. If this error message is displayed, check
if you have selected the proper calibration buffer and
have poured the desired buffer.
Operational Guide
27
Wrong Old Points Inconsistency
“WRONG OLD POINTS INCONSISTENCY” is displayed if
the new calibration differs significantly from the last
value of that sensor in that buffer. In this case it may
be best to clear the previous calibration and attempt a
new calibration with fresh buffers.
Calibration
Messages
To clear calibration information, press CAL then
press CLR. The “CLEAR CALIBRATION” message will
be displayed. Either press the CFM key and clear all
calibration information or press CAL to exit to keep old
calibration data instead of clearing.
Once calibration information is cleared, the message
“CAL DUE” will be displayed
Clean Electrode
“CLEAN ELECTRODE” indicates poor electrode
performance (offset out of accepted window, or
slope under the accepted lower limit). Often, cleaning
the sensor will improve the pH electrodes response.
See pH Electrode Conditioning and Maintenance for
details. Repeat calibration after cleaning.
Check Electrode Check Buffer
“CHECK ELECTRODE CHECK BUFFER” appears when
electrode slope exceeds the highest accepted slope
limit. You should check your electrode and use fresh
buffer. Cleaning may also improve this response.
Bad Electrode
“BAD ELECTRODE” appears if the cleaning procedure
performed as a result of the above two messages is
found to be unsuccessful. In this case it is advised to
replace the electrode.
Wrong Buffer Temperature
“WRONG BUFFER TEMPERATURE” appears if the
temperature of the buffer is outside the defined
buffer temperature range. The calibration buffer
solutions are affected by temperature changes in a
defined manner. During calibration, the instrument
will automatically calibrate to the pH value
corresponding to the measured temperature but display it to the value at 25 ºC.
Immediately after calibration, the buffer should read the value of the buffer at
the temperature of measurement.
Note: Temperature limits will be reduced to actual sensor specifications.
28
Operational Guide
Calibration
Messages
Contaminated Buffer
“CONTAMINATED BUFFER” appears in order to alert
that the buffer could be contaminated. Refresh your
buffer and continue the calibration procedure.
Broken Temperature Sensor
If the temperature sensor should malfunction or
break at any time, a temperature of “25.0º C” will blink
on the second LCD line and the message “BROKEN
TEMPERATURE SENSOR” will appear on the third LCD
line after leaving calibration. The calibration will have
the compensation at 25 ºC.
Note: If this occurs during logging “25 ºC !” will appear in the CSV file.
Good Laboratory Practice (GLP) refers to a quality control function used to
ensure uniformity of sensor calibrations and measurements. The dedicated
GLP key opens a file of the latest calibration information. Use the qp keys to
scroll the stored information. This includes the buffers used, temperature of the
buffer, time and date of the last calibration, the sensor serial number and the
calculated offset and percent slope. This information is available in Basic and
Standard Modes. This information is also included with every data log. Newest
calibration points report as a solid number, older calibration data (that is still
used) will be displayed blinking.
pH GLP
Information
If calibration has not been performed, the instrument
displays a blinking “NO CAL” message.
The pH calibration offset and slope (the GLP slope is
the average of the calibration slopes; the percentage is
referenced to the ideal slope value at the temperature
of calibration). The condition and response indicators
displayed are from the last calibration.
Pressing the qp keys, the last calibration date (yyyy.
mm.dd) together with the current reading is displayed.
Operational Guide
29
pH GLP
Information
Note: If a custom buffer was used in calibration, the “C1” and “C2” tags will be
displayed. If only the one custom buffer is used in calibration, the tag will be “C1”
and the value will be displayed.
If disabled, “EXPIRATION WARNING DISABLED” is
displayed.
Or if enabled the number of days until the calibration
alarm “CAL DUE” will be displayed. (i.e. “CAL EXPIRES
IN 2 DAYS”)
The number of days since the calibration expired. (I.E.
“CAL EXPIRED 2 DAYS AGO”).
The probe serial number together with the current
reading.
If a buffer is not from the last calibration, the buffer
tag will be displayed blinking.
In Standard Mode, Condition and Response gauges are visible on the day of
calibration (See Electrode Condition And Electrode Response Time page 24).
If configured in SETUP, a countdown message displays the number of days
remaining until a new Calibration is due.
If using a HI 11311 or HI 12301 sensor, the glass
impedance is continuously monitored, updated and
reported here and the Junction Condition Gauge is
fully visible.
30
Operational Guide
pH
Measurement
When a pH electrode is connected, the instrument
will recognize it and the “REMOVE PROTECTIVE
AND FILLING CAPS” message will be displayed along
with “PH”. Press any key to skip the message. The
instrument will enter measurement mode. Make
sure the electrode has been calibrated before taking
measurements.
Rinse the pH sensor with water and a sample if
possible. Submerse the electrode tip approximately 3
cm (1¼”) into the sample to be tested and stir sample
gently. Allow time for the electrode to stabilize.
The pH is displayed on the first LCD line and the temperature on the second LCD
line. Using the ARROWS, date, time, battery status and offset with slope can be
displayed on the third LCD line. If the reading is out of measurement range, the
closest full scale value will be displayed blinking on the first LCD line.
If measurements are taken successively in different samples, it is recommended
to rinse the electrode thoroughly with deionized water or tap water and then
with some of the next sample to prevent cross-contamination. The pH reading is
affected by temperature. The temperature effect is compensated for using the
temperature sensor inside the probe. The resulting measurement is the actual
pH at the temperature of measurement.
Error Messages During Measurement
If the pH or temperature exceeds the limits of the
sensor, the message “ELECTRODE OUT OF SPEC”
will scroll on the third LCD line. The temperature will
continue to be displayed. If temperature exceeds the
meter specification of 120º C, then “120º C” will blink
on the display. If interval logging, the message “OUT
OF SPEC.” will alternate with the LOG specific message
in both these cases and the Log file will indicate a “ºC!”
next to the data.
In case the temperature sensor is damaged, “BROKEN
TEMPERATURE SENSOR” will be displayed and the
temperature will display “25.0” and the unit tag
blinking on the second LCD line. The Log file will
indicate “ºC!!” next to the data.
mV Reading Of The pH
The mV reading of the measured pH can be displayed
on the LCD by pressing the RANGE key.
Operational Guide
31
Range Specific Messages Displayed On Third LCD
Line During Measurement
pH
Measurement
All the messages described in General Setup (page 11)
are displayed in pH range.
Temperature Sensor Problem (if there is one)
Cal Due or Offset and Slope Value
Time
Date
Battery or Charge Status
Logging Messages
Out of Calibration Range
Relative mV
Calibration
Calibration Procedure
Pour small quantity of solution into clean beakers. If possible, use plastic beakers
to minimize any EMC interferences. Submerse the ORP electrode approximately
3 cm (1¼”) into the solution and stir gently. Press CAL when the instrument is
in RELATIVE mV measurement mode. The “CAL” tag
will appear and the Absolute mV is displayed on the
primary LCD line and “AbS” message on the secondary
LCD line. The “ ” will be displayed and “WAIT“ will blink
on the third LCD line until the reading is stable.
If the reading is out of range, “WRONG“ will be
displayed on the third LCD line.
When the absolute reading is stable and in
measurement range, the instrument asks for
confirmation, the “CFM” tag will blink.
Press CFM to confirm calibration. The instrument will
display “0.0“ RelmV on the primary LCD line with CFM
tag blinking and “MANUAL“ message on third LCD
line. In this moment the relative mV offset is equal to
absolute mV reading.
Use the ARROW keys for changing the displayed
Relative mV value.
32
Operational Guide
If the calculated offset is higher than ± 2000 mV the
“MAX LIMIT REACHED“ message will scroll on the third
LCD line. Until the error is eliminated the value cannot
be confirmed.
Press CFM to confirm the relative mV value. The display
will show “SAVING“ and returns to measurement
mode.
Note: The relative mV value can be changed only
inside the relative mV offset window (± 2000 mV).
Good Laboratory Practice (GLP) refers to a quality control function used to
ensure uniformity of sensor calibrations and measurements. The dedicated GLP
key opens a file of the latest calibration information. Use the qp keys to scroll
the stored information. This includes the time and date of the last calibration,
the sensor serial number and the offset. This information is also included with
every data log.
Relative mV
GLP
Information
If calibration has not been performed, the instrument
displays a blinking “NO CAL” message.
The relative mV calibration offset is displayed on the
third LCD display.
Pressing the qp keys, the last calibration date (yyyy.
mm.dd) together with the current reading is displayed.
The time of the last calibration is displayed along with
the current reading.
Operational Guide
33
Relative mV
GLP
Information
If disabled, “EXPIRATION WARNING DISABLED” is
displayed.
Or if enabled the number of days until the calibration
alarm “CAL DUE” will be displayed. (i.e. “CAL EXPIRES
IN 2 DAYS”)
The number of days since the calibration expired. (i.e.
“CAL EXPIRED 2 DAYS AGO”).
The probe serial number together with the current
reading.
34
Operational Guide
When an ORP electrode is connected, the instrument
will recognize it and the probe code will be displayed
along with “ORP”. Press any key to skip the message.
The instrument will enter measurement mode.
Rinse the sensor with water and a sample if possible.
Submerse the electrode tip approximately 3 cm (1¼”)
into the sample to be tested and stir sample gently.
Allow time for the electrode to stabilize.
Relative mV
Measurement
The Relative mV value is displayed on the first LCD
line and the temperature on the second LCD line.
Using the ARROWS, date, time, battery status and
offset can be displayed on the third LCD line. If the
reading is out of measurement range, the closest full
scale value will be displayed blinking on the first LCD
line.
Error Messages During Measurement
If the mV or temperature exceeds the limits of the
sensor, the message “ELECTRODE OUT OF SPEC”
will scroll on the third LCD line. The temperature will
continue to be displayed. If temperature exceeds
the meter specification of 120º C, then “120º C” will
blink on the display. If interval logging, the message
“OUT OF SPEC.” will alternate with the LOG specific
message in both these cases and the Log file will
indicate a “ºC!” next to the data.
In case the temperature sensor is damaged, “BROKEN
TEMPERATURE SENSOR” will be displayed and the
temperature will display “25.0” and the unit tag
blinking on the second LCD line. The Log file will
indicate “ºC!!” next to the data.
RelmV Reading
The RelmV reading can be displayed on the LCD by
pressing the RANGE key.
The relative mV reading is equal to the difference
between the absolute mV input and the relative mV
offset established in the relative mV calibration.
Absolute ± Offset = Relative
mV
mV
mV
Operational Guide
35
Maintenance
pH Probe
Maintenance
Remove the protective cap of the pH electrode.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT.
This is normal with electrodes. They will disappear when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb affecting
proper functioning of the electrode. These bubbles can be removed by “shaking
down” the electrode as you would do with a glass thermometer. If the bulb and/
or junction is dry, soak the electrode in HI 70300 or HI 80300 storage solution
for at least one hour.
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add
HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for double junction electrodes.
Unscrew the fill hole cover during measurements so the liquid reference junction
maintains an outward flow of electrolyte.
Measurement
Rinse the electrode tip with distilled water. Submerse the tip 3 cm (1¼”) in the
sample and stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples, rinse
the electrode tip with a few drops of the solution to be tested, before taking
measurements.
Storage Procedure
To minimize clogging and ensure a quick response time, the glass bulb and the
junction should be kept moist and not allowed to dry out.
36
Maintenance
Replace the solution in the protective cap with a few drops of HI 70300 or
HI 80300 Storage Solution or, in its absence, Filling Solution (HI 7082 or
HI 8082 for double junction electrodes).
Follow the preparation procedure before taking measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
pH Probe
Maintenance
Periodic Maintenance
Inspect the electrode and the cable. The cable used for connection to the
instrument must be intact and there must be no points of broken insulation on
the cable or cracks on the electrode stem or bulb. Connectors must be perfectly
clean and dry. If any scratches or cracks are present, replace the electrode. Rinse
off any salt deposits with water.
For refillable electrodes: Refill the reference chamber with fresh electrolyte
(HI 7082 or HI 8082 for double junction electrodes). Allow the electrode to
stand upright for 1 hour.
Follow the Storage Procedure above.
Cleaning Procedure
Use diagnostic messages to aid pH electrode troubleshooting. Several cleaning
solutions are available:
•
General – Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution
for approximately ½ hour.
•
Protein –Soak in Hanna HI 7073 or HI 8073 Protein Cleaning Solution
for 15 minutes.
•
Inorganic – Soak in Hanna HI 7074 Inorganic Cleaning Solution for
15 minutes.
•
Oil/grease – Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning
Solution.
Note: After performing any of the cleaning procedures, rinse the electrode
thoroughly with distilled water, refill the reference chamber with fresh
electrolyte (not necessary for gel-filled electrodes) and soak the electrode
in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking
measurements.
Temperature Correlation For pH Sensitive Glass
Verify the temperature range by reading the limits on electrodes cap. The pH
electrode’s life also depends on the temperature that is used. If constantly cycled
between two temperatures, the life of the electrode is drastically reduced.
Alkaline Error
High concentrations of sodium ions interfere with readings in alkaline solutions.
The pH at which the interference starts to be significant depends upon the
composition of the glass. This interference is called alkaline error and causes
the pH to be underestimated. Hanna’s glass formulations have the indicated
characteristics.
Sodium Ion error for various glass types at ambient temperature
Alkali Error with 0.1 mol/L Na+
pH
12.5
GP
HT
LT
0.11
0.05
0.28
13.0
0.23
0.11
0.35
13.5
0.35
0.16
0.45
14.0
0.48
0.20
0.54
Maintenance
37
pH Probe
Maintenance
ORP Probe
Maintenance
Alkali Error with 1.0 mol/L Na+
pH
GP
HT
LT
11.5
0.11
0.01
0.46
12.0
0.21
0.06
0.62
12.5
0.32
0.11
0.79
13.0
0.43
0.15
13.5
0.45
0.21
14.0
0.65
0.27
Remove the protective cap off the ORP electrode.
Wash off any SALT DEPOSITS. This generally confirms the reference junction is
free flowing.
If the storage cap is dry, the reference junction may be dry also. Soak the
electrode in HI 70300 or HI 80300 storage solution for at least one hour.
Keep the reference electrolyte topped off and the fill hole cover off during
operation.
Add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for double junction
electrodes.
Pretreatment
For a faster response, pretreat the ORP metal surface by soaking it for 15 minutes.
Pretreatment with HI 7091 Reducing Pretreatment Solution, or HI 7092 Oxidizing
Pretreatment Solution can prepare the metal surface for faster electron exchange
with sample. See mV and pH to determine what treatment you should use.
Measurement
Rinse the electrode tip with distilled water. Submerse the tip 3 cm (1¼”) in the
sample and stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples, rinse
the electrode tip with a few drops of the sample before taking measurements.
Storage Procedure
To minimize clogging and ensure a quick response time, protect the ORP sensor
by using the storage cap. Add a few drops of HI70300 storage solution to the
cap to keep the reference junction wetted.
Periodic Maintenance
Inspect the sensor and cable. The cable used for connection to the edge must
be intact and with no points of broken insulation.
The ORP metal surface must be smooth with no scratches. The metal surface
can be polished with a fine-grained emery cloth or powdered alumina.
Cleaning Procedure
Use diagnostic messages to aid troubleshooting. Several cleaning solutions are
available: See pH cleaning for specific contaminants or use a solvent system
capable of dissolving the coating firm.
38
Maintenance
After performing any of the cleaning procedures, rinse the electrode thoroughly
with distilled water, and refill the reference chamber with fresh electrolyte (not
necessary for gel-filled electrodes) and soak the electrode in HI 70300 or
HI 80300 Storage Solution for at least 1 hour before taking measurements.
ORP Probe
Maintenance
Temperature dependence for ORP sensors
The oxidation-reduction potential (ORP) displayed in mV, is the voltage that
results from the difference in potential between the platinum metal surface and
the Ag/AgCl reference electrode. ORP values are not temperature compensated,
although ORP mV can change with temperature (e.g. reference electrode potential
changes and sample equilibrium changes). It is important to report ORP values
together with the reference electrode used and the temperature of measurement.
Symptoms
Problems
Troubleshooting
Guide
Solution
No sensor connection.
Sensor model not
recognized.
Make certain, 3 mm connector is in all
the way by pushing firmly into probe
input.
Slow response/excessive
drift.
Dirty pH electrode.
Clean the electrode and then soak
the tip in HI 7061 or HI 8061 for 30
minutes.
Readings fluctuate up
and down (noise).
pH: Clogged/dirty
junction. Low electrolyte
level (refillable
electrodes only).
Clean the electrode. Refill with fresh
solution (for refillable electrodes only).
Check cable and connectors.
The meter does not
accept the buffer/
standard solution for
calibration.
pH: Dirty electrode or
contaminated buffer.
Follow the cleaning procedure. If still
no results, replace the electrode.
Replace buffer.
Out of range in the pH
scale.
A) Verify that the shipping cap has
been removed.
B) Make sure the pH sample is in the
specified range.
C) Check electrolyte level and general
state of the electrode.
If the display shows:
“mV” and “-1000” or
“1000” blinking.
Out of range in the mV
scale.
A) Verify the shipping cap has been
removed.
B) Make sure the sample pH is within
specified range.
C) Verify electrolyte level in pH sensor
is topped off.
D) Verify no bubbles inside pH
membrane.
The meter does not
measure temperature.
“----” is displayed on
second LCD line.
Broken temperature
sensor.
Replace the probe.
The meter fails to
calibrate or gives faulty
readings.
Broken pH electrode.
Replace the electrode.
At startup the meter
displays all LCD tags
permanently.
One of the keys is stuck.
Check the keyboard or contact your
local Hanna Office.
CAL “Prod” message at
startup.
Instrument was not
factory calibrated or lost
factory calibration.
Contact Hanna Technical Support for
help.
If the display shows: “pH”
and “-2.00” or “16.00”
blinking.
Maintenance
39
Specifications
pH, mV in pH, mV in ORP
Temperature
Range
-2.00 to 16.00 pH
-2.000 to 16.000 pH*
±1000.0 mV in pH
±2000.0 mV in ORP
-20.0 to 120.0 ºC ; -4.0 to 248.0 °F**
Resolution
0.01 pH
0.001 pH*
0.1 mV in pH
0.1 mV in ORP
0.1 ºC; 0.1 ºF
Accuracy
@ 25 °C / 77 °F
±0.01pH
±0.002 pH*
±0.2 mV in pH
±0.2 mV in ORP (±999.9 mV)
±1 mV in ORP (±2000 mV)
±0.5 ºC; ±0.9 ºF
pH Calibration
Automatic, up to 3 points (5 points*) calibration, 5 standard (7
standard*) buffers available (1.68*, 4.01 or 3.00, 6.86, 7.01, 9.18, 10.01,
12.45*) and 2 custom buffers*
Relative mV
Calibration
Single point calibration
Temperature
compensation
Automatic -5 to 100º C (23 to 212º F) (using integral temperature sensor)
Log feature
Up to 1000* records organized in:
Log on demand (Max. 200 logs)
Log on stability (Max. 200 logs)
Interval logging*
Additional Specifications
PC Interface
Micro USB
Storage Interface
USB
Power Supply
5 VDC Adapter (included)
Environment
0-50 ºC (32-122 ºF) Max 95% RH non-condensing
Dimensions
202 x 140 x 12 mm (7.9 x 5.5 z 0.5”)
Weight
250g (8.82 oz)
pH Electrode
HI 11310 Intelligent pH/temperature electrode (included)
*Standard Mode Only
** pH and temperature will be reduced to actual probe/sensor limits.
40
Specifications
Accessories
Electrodes/Probes
HI 10530
Triple ceramic, single junction, low temperature glass, refillable pH
electrode with conical tip and temperature sensor
HI 10430
Single ceramic,double junction, high temperature glass, refillable pH
electrode with temperature sensor
HI 11310
Glass body, double junction, refillable pH/temperature electrode
HI 11311
Glass body, double junction, refillable pH/temperature electrode with
enhanced diagnostics
HI 12300
Plastic body, double junction, gel filled, non refillable pH/temperature
electrode
HI 12301
Plastic body, double junction, gel filled, non refillable pH/temperature
electrode with enhanced diagnostics
HI 10480
Glass body, double junction with temperature sensor for wine analysis
FC 2320
Double junction, open reference, non refillable, electrolyte viscolene, PVDF
body with conical tip, pH/temperature electrode
FC 2100
Double junction, open reference, non refillable, electrolyte viscolene, glass
body with conical tip, pH/temperature electrode
FC 2020
Double junction, open reference, non refillable, electrolyte viscolene, PVDF
body with conical tip, pH/temperature electrode
HI 36180
Glass body, double junction, refillable ORP/temperature probe
HI 36200
Plastic body, single junction gel filled, non refillable ORP/temperature probe
pH
Buffer Solutions
HI 70004P
pH 4.01 Buffer Sachets, 20 mL (25 pcs.)
HI 70007P
pH 7.01 Buffer Sachets, 20 mL (25 pcs.)
HI 70010P
pH 10.01 Buffer Sachets, 20 mL (25 pcs.)
HI 7001L
pH 1.68 Buffer Solution, 500 mL
HI 7004L
pH 4.01 Buffer Solution, 500 mL
HI 7006L
pH 6.86 Buffer Solution, 500 mL
HI 7007L
pH 7.01 Buffer Solution, 500 mL
HI 7009L
pH 9.18 Buffer Solution, 500 mL
HI 7010L
pH 10.01 Buffer Solution, 500 mL
HI 8004L
pH 4.01 Buffer Solution in FDA approved bottle, 500 mL
HI 8006L
pH 6.86 Buffer Solution in FDA approved bottle, 500 mL
HI 8007L
pH 7.01 Buffer Solution in FDA approved bottle, 500 mL
HI 8009L
pH 9.18 Buffer Solution in FDA approved bottle, 500 mL
HI 8010L
pH 10.01 Buffer Solution in FDA approved bottle, 500 mL
ELECTRODE STORAGE SOLUTIONS
HI 70300L
Storage Solution, 500 mL
HI 80300L
Storage Solution in FDA approved bottle, 500 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P
Electrode Rinse Sachets, 20 mL (25 pcs.)
HI 7061L
General Cleaning Solution, 500 mL
HI 7073L
Protein Cleaning Solution, 500 mL
HI 7074L
Inorganic Cleaning Solution, 500 mL
HI 7077L
Oil & Fat Cleaning Solution, 500 mL
Accessories
41
Accessories
HI 8061L
General Cleaning Solution in FDA approved bottle, 500 mL
HI 8073L
Protein Cleaning Solution in FDA approved bottle, 500 mL
HI 8077L
Oil & Fat Cleaning Solution in FDA approved bottle, 500 mL
ELECTRODE REFILL ELECTROLYTE SOLUTIONS
HI 7082
3.5M KCl Electrolyte, 4x30 mL, for double junction electrodes
HI 8082
3.5M KCl Electrolyte in FDA approved bottle, 4x30 mL, for double junction
electrodes.
ORP STANDARD SOLUTIONS
HI 7021L
ORP Test Solution 240mV @ 25 ºC/ 77 ºF, 500 mL
HI 7021M
ORP Test Solution 240mV @ 25 ºC/ 77 ºF, 230 mL
HI 7022L
ORP Test Solution 470mV @ 25 ºC/ 77 ºF, 500 mL
HI 7022M
ORP Test Solution 470mV @ 25 ºC/ 77 ºF, 230 mL
ORP PRETREATMENT SOLUTIONS
HI 7091L
Reducing Pretreatment Solution, 500 mL
HI 7091M
Reducing Pretreatment Solution, 230 mL
HI 7092L
Pretreatment oxidizing solution, 500 mL
HI 7092M
Pretreatment oxidizing solution, 230 mL
Other Accessories
HI 75110/220U
42
Voltage adapter from 115 Vac to 5 Vdc (USA plug)
HI 75110/220E
Voltage adapter from 230 Vac to 5 Vdc (European plug)
HI 76404B
Electrode holder
HI 2000WC
Wall cradle
HI 2000BC
Bench cradle
HI 920015
Micro USB cable
Accessories
edgepH ® is guaranteed for two years against defects in workmanship and
materials when used for its intended purpose and maintained according
to instructions. Electrodes and probes are guaranteed for six months. This
warranty is limited to repair or replacement free of charge. Damage due to
accidents, misuse, tampering or lack of prescribed maintenance is not covered. If
service is required, contact your local Hanna Office. If under warranty, report the
model number, date of purchase, serial number and the nature of the problem.
If the repair is not covered by the warranty, you will be notified of the charges
incurred. If the instrument is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization number from the Technical Service department
and then send it with shipping costs prepaid. When shipping any instrument,
make sure it is properly packed for complete protection.
Warranty
Warranty
43
12/14
MANEDGEPH
Hanna Instruments reserves the right to modify the design, construction or appearance of its
products without advance notice.
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