Eutech Instruments ORPTestr 10, 10BNC User Manual
This Instruction Manual is also available for download on our Web-site: eutechinst.com or 4oakton.com
INSTRUCTION MANUAL
ORPTestr 10, 10BNC
Large Screen
Waterproof ORP / Redox Tester
Double Junction
Introduction
Thank you for selecting our microprocessor waterproof ORP tester. You have one of two
models:
• ORPTestr10
• ORPTestr10BNC
This manual provides a step-by-step guide to operate the testers.
Before you begin:
To condition electrode, immerse electrode in electrode storage solution or tap water for
at least 30 minutes before use. DO NOT use de-ionized water.
Note: For ORPTestr10BNC, please refer to the ORP electrode’s instruction manual.
Calibration
Calibration is not necessary unless exact readout agreement with a work standard and
at a specific ORP value is needed. To achieve this, use the following procedure:
1. Switch unit on (ON/OFF button)
2. Select a known solution sample from the actual process as near the critical ORP
value as possible, for example, 255 mV.
3. Dip the conditioned electrode into this solution for 2 to 5 minutes until the
readings stabilize. Ensure the whole sensor is immersed.
4. Press CAL button to enter Calibration mode. The screen will switch to a dual
display with the upper display flashing the relative mV value to be calibrated
and the lower display showing the default measurement value of the sample. The
‘CAL’ indicator will also be shown on the screen replacing ‘MEAS’ to indicate
that the tester is in calibration mode.
Note: To abort calibration, press the ‘CAL’ button to return to the measurement
mode.
5. Immediately press and hold the HOLD/ENT button to scroll the reading to
match value of the known solution sample. The offset adjustment is up to
+/- 150mV from the default measurement.
6. To complete the calibration, release the HOLD/ENT button and wait for 5
seconds for automatic confirmation. The primary display will stop flashing and
the secondary display will automatically show ‘CO’ before the screen return to
the single display measurement mode. The mV annunciator will now changed to
‘R.mV’ indicating the value displayed is a relative mV value of the default
measurement.
7. Rinse electrode in tap water before measuring other solutions.
Press
HOLD/ENTER
to increase offset up to
+150 mV from default
value. It will roll over to
-150 mV from default
value and start
increasing again.
Figure 1: Calibration or Offset Adjustment Sequence
Wait for
5 seconds.
Meter will
automatically
confirms & accepts
standard value.
ORP Measurement
1. Remove cap from the electrode and press the ON/OFF button to switch the
tester on.
2. Dip the electrode about 2 to 3 cm into the test solution. Stir once and let the
reading stabilize for 2 to 5 minutes.
3. Note the ORP value or press HOLD/ENT button to freeze the reading. Press
HOLD/ENT again to release the reading.
4. Press ON/OFF to turn off tester. If you do not press a button for 8.5 minutes,
the tester will automatically shut off to conser ve batteries.
Switching on
ORP Testr 10
Ready to take
measurement
Figure 2: Power Up Sequence
HOLD Function
This feature lets you freeze the display for a delayed observation
1. Press HOLD/ENT button to freeze the measurement. A ‘HOLD’ indicator will be
displayed and the measurement will be frozen.
2. Press HOLD/ENT again to release the measurement. The ‘HOLD’ indicator will not be
displayed anymore indicating the held measurement is released.
Figure 3: Hold Function
User Reset
You can reset the ORP calibration to the factory default by using the user reset function.
1. Switch off the tester.
2. While pressing the ‘Cal’ button, press and release the ON/OFF button to enter the
‘User Reset’ selection menu. The screen will display ‘rSt’ on the bottom display with
a flashing ‘nO’ selection.
3. Use the ‘CAL’ button to toggle between ‘nO’ and ‘YES’ selection.
• nO deactivates reset selection
• YES activates the reset selection
4. Press the HOLD/ENT button to confirm the selection made.
With meter
powered
off, press
CAL and
ON/OFF at
the same
time. First
release
ON/OFF
button,
then CAL
button.
Figure 4: User Reset Sequence
After
reset,
whole
LCD
segment
lits up and
goes back
to
measurement
mode.
Electrode Maintenance
1. Rinse the electrode with tap water or electrode storage solution after each
measurement.
2. In aggressive chemicals, dirty or viscous solutions, and solutions with heavy
metals or proteins, take readings quickly and rinse electrode immediately afterward.
3. If possible, keep a small piece of paper or sponge in the electrode cap – moistened
with clean water or electrode storage solution (NOT de-ionized water) – and close
the cap over the electrode.
Changing Batteries
1. Open battery compartment lid (with attached lanyard loop).
2. Remove old batteries; replace with fresh ones. Note polarity.
(shown in diagram below)
Electrode Replacement
You can replace the electrode module at the fraction of the cost of a new tester.
When the tester fails to calibrate or gives fluctuating readings in calibration standards,
you need to change the electrode.
1. With dry hands, grip the ribbed tester collar with electrode facing you. Twist
the collar counter clockwise (see picture A). Save the ribbed tester collar and
O-ring for later use.3. Align the four tabs on the new module so that they
match the four slots on the tester (see picture B).
2. Pull the old electrode module away from the tester.
3. Align the four tabs on the new module so that they match the four slots on the
tester (see picture B).
Rotate collar
away from you
Applications
Water quality testing • pools • spas • cooling towers • water purification • chromate
reduction • cyanide oxidation • boilers • pulp bleaching • ozone systems • water and
wastewater treatment • and more!
Warranty
The waterproof ORPTestr10DJ and ORPTestr10BNC are warranted to be free from
manufacturing defects for 2 years and electrode module for 6 months. If repair, adjustment
or replacement is necessary and has not been the result of abuse or misuse within the
time period, please return the tester – freight prepaid – and correction will be made
without charge. Out of warranty products will be repaired on a charge basis.
Return of Items
Authorization must be obtained from your distributor before returning items for any
reason.
When applying for authorization, please include information regarding the reason the
item(s) are to be returned.
Note: We reserve the right to make improvements in design, construction and appearance
of products without notice. Prices are subject to change without notice.
Self-Diagnostic Messages
Low battery
indicator
Over range /
Under range
signal
Error
Message
Or / UrOr / Ur
Or / Ur
Or / UrOr / Ur
ErEr
.0.0
Er
.0
ErEr
.0.0
3 Bars indicates Battery is full (100%)
2 Bars indicates 50% of the battery life is left
1 Bar indicates 25% of the battery life is left
Blinking battery casing indicates the need to replace
batteries with fresh ones as specified by manufacturer
Electrode is not in contact with solution or electrode
is failing
Replacement sensor is not connected properly to the
tester during sensor replacement
mV calibration error while attempting to calibrate tester to a
value which is out of range
Rlbbed collar
Insert Electrode Module
Electrode Module
Small O-ring
Small Tab Large Tab
Large
O-ring
4. Gently push the module onto the slots to sit it in position. Push the smaller
O-ring fully onto the new electrode module. Push the collar over the module
and thread it into place by firmly twisting clockwise.
Note: It is necessary that you recalibrate your tester prior to measurement after an
electrode replacement.
SpecificationsSpecifications
Specifications
SpecificationsSpecifications
Large Screen TesterLarge Screen Tester
Large Screen Tester
Large Screen TesterLarge Screen Tester
ORPTestr10 / ORP Testr 10BNCORPTestr10 / ORP Testr 10BNC
ORPTestr10 / ORP Testr 10BNC
ORPTestr10 / ORP Testr 10BNCORPTestr10 / ORP Testr 10BNC
Range -999 mV to +1000 mV
Resolution 1 mV
Accuracy ±2 mV
Calibration Window Offset adjustment up to ± 150mV
Auto Off After 8.5 minutes from last key press
User Reset Yes
Non Volatile Memory Backup Yes
LCD Display Dual
Power Requirement 4 x 1.5V “A 76” micro Alkaline Batteries
Battery Life More than 500 hours
Operating Temperature 0 – 50 °C
Tester Dimension 6.5 “L x 1.5”dia. (165 x 38 mm)
Boxed: 220 x 60 x 50 mm
Weight 3.25 oz (90 gm)
68X068043 01/04 Rev 0
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