Ele 430-020 User manual

pH/mV Temperature Meter
430-020
19907X0088 Issue 2
OPERATING INSTRUCTIONS
pH/mV Temperature Meter
430-020
ELE International
Chartmoor Road, Chartwell Business Park
Leighton Buzzard, Bedfordshire, LU7 4WG
England
phone: [phone]
fax: [phone]
email: [email protected]
http://www.ele.com
ELE International, a division of Hach Lange Ltd.
Distributor:
ELE International
Soiltest Product Division
PO Box 389, Loveland, CO 80539
USA
phone: [phone]
fax: [phone]
email: [email protected]m
http://www.eleusa.com
In the interests of improving and updating its equipment, ELE reserves the right to alter
specifications to equipment at any time ELE International 2016 ©

pH/mV Temperature Meter
430-020
29907X0088 Issue 2
Contents
Section Page
1 Safety 3
2 Introduction 3
2.1 General 3
2.2 Instrument Specification 4
3 Installation 5
3.1 Unpacking 5
3.2 Connection 5
3.3 Display and Controls 5
4 Temperature Adjustment 7
4.1 Manual Temperature Adjustment 7
4.2 Automatic Temperature Correction (ATC) 7
5 Calibration and Measurement 8
6 Care and Maintenance 10
6.1 Battery Replacement 11
7 Spare Parts 11
8 Service and Support 11
8.1 Service 11
8.2 Technical Support 12
Declaration of Conformity 13

pH/mV Temperature Meter
430-020
39907X0088 Issue 2
1 Safety
Please read this information carefully prior to installing or using this
equipment.
1.1 The unit described in this manual is designed to be operated only by
trained personnel. Any adjustments, maintenance and repair must be
carried out as defined in this manual, by a person qualified to be aware
of the hazards involved.
1.2 It is essential that both operating and service personnel employ a safe
system of work, in addition to the detailed instructions specified in this
manual.
1.3 Other than for those items defined in the maintenance procedures
herein, there are no user serviceable items in this instrument. Removal
of covers and attempted adjustment or service by unqualified personnel
will invalidate the warranty and may incur additional charges for repair.
1.4 References should always be made to the Health and Safety data
supplied with any chemicals used. All available information, advice and
warnings on the handling, storage, use and disposal of such must be
carefully observed. Generally accepted laboratory procedures for safe
handling of chemicals should be employed. Suitable safety and
personal protective equipment must be used at all times.
1.5 If it is suspected that safety protection has been impaired in any way,
the unit must be made inoperative and secured against any intended
operation. The fault condition should immediately be reported to the
appropriate servicing authority.
2 Introduction
2.1 General
The 430-020 is a general purpose hand-held pH/mV and temperature meter
offering 2 point calibration and automatic buffer recognition. This model
simultaneously displays either temperature compensated pH readings or
electrode potential and temperature.

pH/mV Temperature Meter
430-020
49907X0088 Issue 2
2.2 Instrument Specification
Model
430-020
Type
pH/mV and temperature
Waterproof
Yes (IP67)
pH Range
-2 to 16pH
pH Resolution
0.01pH
pH Accuracy
+/-0.02pH
mV Range
-1000 to 1000mV
mV Resolution
1mV
mV Accuracy
+/- 1mV
ATC
0 to 100°C
Temperature Range
-39.9 to 149.9°C
Temperature Resolution
0.1°C
Temperature Accuracy
+/-0.4°C (-10 to 70°C)
No. of Calibration Points
2
Automatic Buffer Recognition
Yes, 4, 7 and 10 pH
Auto Shut Off
10 mins
Operating Temperature
0 to 100°C
Battery Life (hours)
2500
pH Connector
BNC
Temperature Connector
Waterproof Lumberg screw-locking
type
Dimensions (l x w x d)
141 x 71 x 32mm
Weight
230g
Instrument Warranty
1 year
Electrode/Temperature probe
warranty
6 months

pH/mV Temperature Meter
430-020
59907X0088 Issue 2
3 Installation
3.1 Unpacking
Remove the 430-020 from the packaging and ensure the following items are
included:
a) Model 430-020 pH and temperature meter
b) Epoxy bodied combination pH electrode (430-020/10)
c) Temperature probe (430-020/12)
d) pH 4, 7 and 10 buffer sachets
e) 3 x AAA alkaline batteries (fitted)
f) Instruction manual (9907X0088)
3.2 Connection
Connect the electrode to the BNC socket on the instrument and remove the
protective cap covering the electrode. Connect the temperature probe to the
connector on the instrument and remove the protective sheath. Press the
ON/OFF key to turn the instrument on.
3.3 Display and Controls
The pH meter has an LCD display which displays either the temperature
compensated pH readings or electrode potential and temperature
simultaneously. The keypad used for this meter enables an easy and
effective way of calibrating and performing a measurement.
1
4
2

pH/mV Temperature Meter
430-020
69907X0088 Issue 2
Fig. 1 - Display and Controls
1. Display showing pH or electrode potential and temperature reading
2. BNC connector for pH electrode
3. Connector for temperature probe
4. UP arrow Key for adjusting values
5. DOWN arrow key for adjusting values
6. On/Off key
7. MODE key to change the display between pH or mV and temperature
(single press), changing between °C and °F units (long press)
8. Calibration and Backlight key for calibrating the instrument and
switching on the backlight respectively
The instrument will switch off automatically after 10 minutes of inactivity (i.e.
no key presses). To disable the auto-off function press and hold the Up
arrow key whilst switching the unit on. “Auto-off disable” will be displayed
across the screen. When the unit is turned off the auto-off function will be
re-enabled.
2
3
1
4
5
6
7
8

pH/mV Temperature Meter
430-020
79907X0088 Issue 2
To change the instrument temperature units between °C and °F, press and
hold the MODE key for 3 seconds.
When the instrument is turned on a single press of the CAL and backlight
key will turn the backlight on. Another press will switch the backlight off.
When the backlight is on it will automatically turn off after 10 seconds. If the
low battery icon is showing the backlight function will not work.
If mV is selected instead of pH the instrument will read the voltage generated
by a pH, redox or ion type electrode within the range of ±1000mV.
4 Temperature Adjustment
Model 430-020 is supplied with a temperature probe enabling automatic
temperature compensation to be used. If the probe is disconnected then
manual temperature compensation can be used instead.
4.1 Manual Temperature Adjustment
If the temperature probe is disconnected ‘MANUAL’ will be displayed above
the temperature value. To manually adjust the temperature press or hold the
Up or Down arrow keys to adjust the temperature in whole degrees.
Note that manual temperature adjustment can only be performed if the
temperature probe is not connected.
4.2 Automatic Temperature Correction (ATC)
When the temperature probe is connected the 430-020 meter will
automatically detect the connection and the temperature will be displayed
continuously on the screen. The pH reading will be automatically
compensated depending on the temperature of the sample being measured.
The ATC range is 0 to 100°C (32 to 212°F). If the temperature probe is
removed the temperature will be displayed for 10 seconds.
‘Hi Temp Err’ is displayed if the readings are above 100°C.
‘Lo Temp Err’ is displayed if the readings are below 0°C.

pH/mV Temperature Meter
430-020
89907X0088 Issue 2
5 Calibration and Measurement
Before performing a measurement the instrument must be calibrated. It is
recommended that the instrument is calibrated daily to achieve consistent
and accurate results. Model 430-020 has a 2 point calibration process. The
first calibration point MUST be buffer pH 7.00. The second calibration point
depends on the acidity of the solution which is to be measured. For samples
with a pH around 5 the second calibration point should be 4.01 pH buffer.
For samples with a pH around 8 the second calibration point should be
10.01pH buffer. Always rinse the pH and temperature probes in de-ionised
water before placing in each buffer solution. If the ATC probe is connected
the instrument automatically compensates for the resulting change in
electrode response due to temperature during the calibration process.
Press the ON/OFF key to switch the instrument on. If the temperature probe
is not connected ‘MANUAL’ will be displayed above the temperature value. If
manual temperature adjustment is being used, the temperature of the
solution must be measured using a thermometer so that the temperature can
be manually adjusted.
Place the pH electrode and temperature probe into 7.00 pH buffer solution
and allow the reading to stabilise. Stir, then press and hold down the CAL
key for 3 seconds. Auto-Cal will flash up on the display and then the current
reading will be displayed. Once the reading has stabilised press the CAL
key, rinse the electrode and temperature probe in deionised/distilled water
and place them into 4.01 pH or 10.01 pH solution and allow the reading to
stabilise, again stir the solution to remove any air bubbles. To finish press
the CAL key, ‘Calibrated Ok’ will flash up and the display will show the
solution value of the buffer.
To abort the calibration point at any time press the ON/OFF key and the
meter will revert back to any previous calibration values.
During the calibration process the instrument will automatically detect the
buffer solution. However if you know the exact pH value for the buffer at a
given temperature (temperature coefficient) you can change the offset BS
(buffer solution 7.00pH) and slope BS (buffer solution 4.01 or 10.01) by
using the Up or Down arrow keys. Refer to your calibration
solutions/capsules temperature coefficients before any alterations are
carried out.

pH/mV Temperature Meter
430-020
99907X0088 Issue 2
‘FAIL’ will be shown if 7.00 pH buffer isn’t used as the first calibration point.
If the electrode and buffer solution’s combined error is greater than 0.5 pH or
30mV then ‘Error I/P’ will be displayed and the calibration aborted. If the
electrode and buffer solution’s combined error is greater than 30mV then
‘FAIL’ will be displayed and the calibration aborted. If the electrode and
buffer solution’s combined slope error (4.01 or 10.01) is greater than 0.5pH
or 15% ‘Slope error’ will be displayed. If the slope error is greater than 15%
the ‘FAIL’ will be displayed.
If an error is displayed during a correctly performed pH calibration this can
be investigated using the mV reading from the pH electrode to determine if
the electrode needs to be replaced. With the instrument in mV mode place
the clean/conditioned electrode and temperature probe into buffer pH 7.00 at
a temperature of 25°C and leave for 30 seconds to stabilise. Record the mV
reading (Asymmetry Potential). Rinse the electrode and temperature probe
in distilled or deionised water, blot and repeat the process in buffer pH 4.01.
Record the mV reading and calculate the difference between the two to
obtain the span.
Example:
Reading at 7.00 pH: 4 mV
Reading at 4.01 pH: 178 mV
Span = 178 –4 = 174mV
In order to calculate the slope percentage (Condition), divide the calculated
span by the theoretical span and times it by 100. The theoretical span
between 7.00 pH and 4.01 pH is 176.9 mV.
Slope % = 174/176.9 x 100 = 98%
If your results are below 85% or your mV reading exceeds ±30mV at 7pH,
then you will need to replace the electrode.
Once the instrument is calibrated the sample can be measured. Place the
pH electrode and temperature probe into the sample and allow to stabilise.

pH/mV Temperature Meter
430-020
10 9907X0088 Issue 2
If ‘Over Range pH Err’ is displayed the readings are higher than 16pH or
1000mV.
If ‘Under Range pH Err’ is displayed the readings are below -2pH or -
1000mV.
If ‘No Probe Err’ is displayed the pH electrode is not connected.
6 Care And Maintenance
Over time the electrode sensor will degrade, but regular calibrating, cleaning
and the correct storage will prolong its life. The epoxy bodied combination
electrode supplied with this instrument is suitable for the majority of tests
carried out in aqueous solutions. For other applications, such as low ionic
strength, Tris buffers, high temperatures and strongly acidic solutions a more
suitable pH/reference electrode pair may be required. Details or advice are
supplied on request at [email protected].
If the electrode readings are slow or erratic, place the electrode into cleaning
solution or 7.00 pH solution for at least half an hour to one hour before
testing again. The temperature probe and pH electrodes are not waterproof
and cannot be fully immersed in water. It is recommended that the
instrument is calibrated daily to achieve consistent and accurate results.
The following general guidelines indicate the care and maintenance
required:
Always rinse the pH electrode with cleaning solution or deionised water
before next use.
Electrodes should be stored:
away from direct sunlight
in a vertical position
within their specified temperature range
Always ensure the electrode is used within its specified temperature range.
Ageing of electrodes used above their specified temperature is rapid and
irreversible.

pH/mV Temperature Meter
430-020
11 9907X0088 Issue 2
DO NOT touch the sensitive glass pH membrane or reference junction.
Excess droplets of solution may be removed by gently blotting with filter
paper or tissue.
DO NOT rub the electrode as this may induce an electrostatic charge.
During use ensure the electrode is rinsed between each measurement to
eliminate the contamination of solutions.
6.1 Battery Replacement
Replace the battery when the battery icon is low.
This meter will continue to measure accurately but after further usage the
meter will display ‘FLAt bAT’ and shutdown.
Unscrew the screws on the back of the meter and replace with three AAA
batteries ensuring that the polarities are correct.
7 Spare Parts
Part Code
Description of Spare Part
430-020/10
Epoxy bodied electrode
430-020/12
Temperature probe
8 Service and Support
8.1 Service
Our dedicated service staff are on hand to help in the unlikely event that your
equipment develops a fault. Please contact them by one of the following
means with a clear description of the problem:
E-mail:
[email protected]
Tel:
[phone]
Fax:
[phone]
On occasion it may be necessary for your equipment to be sent back to our
Service Department for repair. In this case please contact the Service
Department for a reference number which you should include with your faulty
equipment. Please also ensure you include a clear description of the fault.

pH/mV Temperature Meter
430-020
12 9907X0088 Issue 2
All replacement parts are guaranteed for 6 months and wherever possible
returned equipment is turned around in 10 working days.
8.2 Technical Support
ELE International have a dedicated Technical Support team who are on
hand to help with any applications advice and questions you may have about
our products and how to use them. If you require any technical or application
assistance please contact the team at:
E-mail:
[email protected]
Tel:
[phone]

pH/mV Temperature Meter
430-020
13 9907X0088 Issue 2
Declaration of Conformity
pH/mV Temperature Meter, Model 430-020
This product complies with the requirements of the EU Directives listed
below:
2004/108/EC EMC Directive.
2011/65/EC RoHS Directive.