ETI 8100, 8000 User Manual

BUFFER SOLUTIONS/CAPSULES

It is recommended that you use buffer solutions closest to
your expected measurement range.
If you are measuring approx. 5 pH then calibrate using

7.00 & 4.01 pH buffer solutions.
Rinse the pH & temperature probes in de-ionised water
before placing in each buffer solution, if this is not
available tap water is acceptable.
The buffer solution’s value changes with temperature and
so the instrument automatically compensates for this during
calibration. Therefore only buffer solutions that follow the
temperature coefficients shown in the table below should
be used with these instruments for best accuracy.

0 4.01 7.12 10.32
5 4.01 7.09 10.25
10 4.01 7.06 10.18
15 4.00 7.04 10.12
20 4.00 7.02 10.06
25 4.01 7.00 10.01
30 4.01 6.99 9.97
35 4.02 6.98 9.93
40 4.03 6.97 9.89
45 4.04 6.97 9.86
50 4.06 6.97 9.83
55 4.08 6.97 9.81
60 4.10 6.98 9.79

temperature 4.01 pH 7.00pH 10.01pH

SPECIFICATION

range 0 to 14 pH 0 to 99.9 °C
resolution 0.01 pH 0.1 °C
accuracy ±0.05 pH ±0.5 °C
battery & battery life 3 x 1.5 volt AAA - 5000 hours
sensor type combination electrode / thermistor
display custom LCD
dimensions 25 x 56 x 128 mm
weight 130 grams

specification pH temperature

ACCESSORIES

Cleaning Solution

816-040 pH electrode cleaning solution 480ml

Storage Solution

816-041 pH electrode storage solution 500ml

Buffer Solutions

816-050 4.01 pH buffer solution pink 100 ml
816-051 7.00 pH buffer solution yellow 100 ml
816-052 10.01 pH buffer solution blue 100 ml

Buffer Capsules

816-004 4 pH buffer capsules pack of 10
816-007 7 pH buffer capsules pack of 10
816-009 9 pH buffer capsules pack of 10

ph Electrodes

823-501 Combination pH electrode
823-502 12 mm Spear Combination pH electrode
823-503 6 mm Spear Combination pH electrode
823-510 pH meat knife probe

manufactured by

Electronic Temperature Instruments Ltd

Easting Close, Worthing, West Sussex BN14 8HQ

tel: [phone] · fax: [phone]

email: [e-mail] · www.etiltd.com

User Manual

8000/8100

pH meters

545-080 15.03.13

GETTING STARTED

To begin taking measurements, connect the probe/s to the
socket/s on the instrument and remove the cap or bottle
covering the electrode.
Please note: a small amount of 4.01 pH solution is with­in the cap/bottle to ensure the electrode remains in good
moist condition when in storage. White crystals may form
on or around the electrode this is normal, remove with a
clean damp cloth.
Calibrate the unit as per instructions in Calibration
section.
Switch the unit on and place the electrode into the
solution to be measured.
The 8000 or 8100 with probe disconnected will
display the set temperature for 10 seconds. With the
probe plugged in the 8100 meter will display the
temperature continuously.
Stir the solution and wait for the measurement to
stabilise.
To prolong the life of the electrode, please read the Care
& Maintenance and Storage & Cleaning sections

Calibration - It is recommended that you calibrate the
unit daily to achieve consistent and accurate results.
Turn the meter on and place the electrode and
thermometer/probe into 7.00 pH buffer solution.
If using the manual temperature adjustment, first
measure the solution with a thermometer and adjust the
instrument to this reading. As per Temperature adjust­ment 8000/8100 (manual) section
With the electrode in the 7.00 pH solution allow the
reading to stabilise. Press and hold down the 'CAL' button
for 3 seconds, 'CAL' will be shown in the display and the
reading displayed will flash.
Place the electrode into 4.01 pH or 10.01 pH solution
and allow the reading to stabilise, stir the solution if
required to remove air bubbles.
If you are measuring approx. 5pH then calibrate using

7.00 & 4.01 pH buffer solutions.
If you are measuring approx. 8pH then calibrate using

7.00 & 10.01 pH buffer solutions.
To finish press the 'CAL' button and the display will show
the solution value that it is currently in.
To abort calibration at any point press the 'ON/OFF'
button - the meter will revert back to any previous
calibration values

INSTRUMENT FUNCTIONS

Auto-Off - The instrument will switch off automatically
after 10 minutes. To disable the auto-off function press and
hold the '' button whilst switching on the unit – auto-off
disabled will scroll across the screen to confirm this.

Please note: when the unit is turned off the auto-off
function will be re-enabled

C/F Selection - With the unit switched off, press and
hold the 'ON/OFF' button for 5 seconds to switch the
units between C and F.

Temperature adjustment 8000/8100 (manual) - To
manually adjust the temperature hold down the 'TEMP'
button for 3 seconds until 'Set' is displayed. Press or
hold the '' or '' button to adjust the temperature in
whole degrees. Press the 'ON/OFF' button to store the
temperature change.

Please note: Manual temperature adjustment on 8100
requires the temperature probe not to be plugged in.
To view the set temperature press the 'TEMP' button and
the temperature will be displayed for 10 seconds on
screen.

Temperature adjustment 8100 (ATC only) - When
the temperature probe is connected to the 8100 meter
it will be automatically detected and on connection the
temperature is displayed continuously.
Please note that with the probe attached the meter can
measure from 0 to 100 °C (32 to 212 °F).
If the probe is removed from the meter the temperature is
displayed for 10 seconds.
If the temperature probe is not used with the meter please
refer to the manual temperature adjustment.

ERRORS

Calibration - 'Err' will be shown if you do not calibrate at

7.00 pH first. If the probe & buffer solution’s combined
error is greater than 1 pH then 'Err' will be displayed and
calibration aborted.
If the probe & buffer solution’s combined slope error is
greater than 0.5 pH 'Err' will be displayed. To abort
calibration press the 'ON/OFF' button - the meter will
revert back to any previous calibration values.

pH Electrode - The pH electrode is connected via the
BNC connector; if this is not connected the readings
displayed are meaningless.

If 'Hi' is displayed the readings are higher than 14 pH and
if 'Lo' is displayed the readings are below 0 pH.
'Err' is displayed if readings are more significantly
outside of the specified measurement range or the
electrode is damaged.

Temperature Probe - 'Hi' is displayed if the readings
are above 100 ºC (212 °F) and 'Lo' is displayed if
readings are below 0 °C (32 °F).
Please note: ATC only works between 0 °C (32 °F) and
60 °C (140 °F)

CARE & MAINTENANCE
This pH meter and electrode if maintained correctly

should give years of service as long as the electrode
is maintained. Over time the electrode sensor will
degrade but regular calibrating, cleaning and storage of
the unit will prolong its life.
If the electrode readings are slow or erratic, place the
sensor into cleaning solution or 7.00 pH solution for at
least half to one hour before testing again.

ELECTRODE STORAGE & CLEANING
Ensure that the electrode glass bulb is kept wet by

replacing the storage cap after each use. Storage
or 4.01 pH solution can be used in the cap/bottle.
Always rinse the pH electrode with cleaning solution or
de-ionized before next use, if this is not available tap
water can be used. Do not touch the glass bulb or clean
with harsh materials.

BATTERY REPLACEMENT

Replace the battery when battery icon is displayed. This
meter will continue to measure accurately but after
further usage the meter will display “flat bat” and
shutdown.
Unscrew the screw on the back of the meter and replace
with three AAA batteries, ensuring the polarities are
correct.

EMC/RFI

Reading may be affected if the unit is operated within
radio frequency electromagnetic field strength of greater
than 1 volt per meter performance of the instrument will not
be permanently affected.