In-situ Aqua TROLL 600 User manual

Aqua TROLL 500 & Aqua TROLL 600 pH/ORP Sensor
Part Number 0063470
Description
The pH/ORP sensor is a combination, single-junction electrode
that contains a platinum ORP sensor, a glass pH sensing bulb, a
replaceable junction, and refillable reference electrolyte
solution. The sensor is designed and manufactured for long-
lasting, accurate results in a variety of environmental waters.
Installation
1. Remove the restrictor or cal cup from the front end of the
instrument. This allows access to the sensor block.
2. Remove the black storage cap from the sensor and save it
for future sensor storage.
Salt crystals may form on pH/ORP sensors during
storage. These crystals are normal and do not
impact sensor performance.
3. Rinse the sensor with clean water.
4. Remove any moisture or dirt from the instrument and
remove the port plug or other sensor from the sensor port.
Retain the plug for future storage.
5. Remove the dust cap from the sensor connector. Check
lubrication of the O-rings. If the O-rings appear dry, apply a
small amount of silicone lubricant, provided in the sensor
box, before installation.
6. Insert the sensor into the sonde and push until it is fully
installed and flush.
Notice the blue sensor interlock grooves on the
wiper motor. You must install the sensors so that
they slide into the grooves.
1 Sensor interlock grooves
2 Sensor interlock tab
7. Use the Allen wrench to tighten the screw at the base of
the sensor. Do not overtighten the screws.
Calibration
The pH/ORP sensor requires separate calibrations for pH and
ORP.
ORP
A 1-point calibration in a solution with known potential at a
given temperature is sufficient to calibrate ORP. Use Quick
Cal or ZoBell's solution for a 1-point calibration that calculates
the sensor offset, or use default coefficients in the software to
reset the factory defaults.
pH
Although pH may be calibrated with Quick Cal (1 point at pH
7), In-Situ recommends a 2- or 3-point calibration. Use
calibration solutions closest to the pH range you expect to
measure. The Default Coefficients option resets factory
defaults to the sensor. No solutions are required.
Sensor Calibration Procedure
For proper calibration procedures for all sensors, please
consult the instrument manual.
Information subject to change without notice. In-Situ, In-Situ logo, Baro Merge, BaroTROLL, HERMIT, HydroVu™, iSitu, Pocket-Situ, RDO, RuggedCable,
RuggedReader, SmarTROLL™, TROLL, VuSitu, and Win-Situ are trademarks or registered trademarks of In-Situ Inc.©2016. All rights reserved. This product
may be covered by patents identified at www.in-situ.com/patents
2018-05-14 | 0063472
Instruction Sheet

Instruction Sheet
Resetting Default Coefficients
Sensor calibration may be reset to factory defaults at any time.
This option is most effective when the sensor is new. This is also
a good option for the ORP sensor if the results of a recent
calibration are suspect because the calibration solution has
deteriorated. Results for each parameter must be set separately.
Cleaning and Storing the pH/ORP Sensor
Routine Maintenance
If the ORP platinum electrode is dull or dirty, it can be cleaned
with a swab and methanol or isopropyl alcohol. Rub the
electrode gently until it is shiny.
The pH sensor must be kept moist for the life of the sensor.
The sensor fill solution has a shelf life of 2 years. Replace the fill
solution every 5 to 6 months or when:
lThe sensor fails to calibrate within the acceptable slope
and offset range.
lSensor readings vary.
lReadings during calibration at pH 7 are greater than +30
mV or less than -30 mV.
lSensor is slow to respond.
If the sensor fails to calibrate after you replace
the fill solution, replace the reference junction.
Replacing the Filling Solution
1. Remove the sensor from the port.
lAqua TROLL 500/600—Loosen the screw at the
bottom of the sensor. Insert the tool into the small
hole and lever the sensor out of the sonde.
2. Install the dust cap on the connector end or wrap the
connector end in a paper towel to prevent solution from
entering the connector.
3. Unscrew the reference junction.
4. Hold the sensor at an angle and empty the old filling
solution into a paper towel or trash can.
5. Lightly shake the bottle of reference filling solution to mix.
Turn the bottle upside down until fluid begins to drip from
the fill tube. This will eliminate air bubbles in the solution.
6. Insert the fill tube into the bottom of the empty reservoir.
Squeeze a steady stream of solution into the reservoir while
slowly pulling the tube out. Overfill slightly, then reinsert the
tube and pull back out to ensure no air bubbles are
trapped.
7. Attach the reference junction cap to the sensor and tighten
until it touches the sensor body. Turn the cap 90° more
(one quarter of a turn). Some filling solution will overflow.
Wipe the excess off the sensor body.
8. Soak the sensor in tap water for at least 15 minutes.
9. Calibrate the sensor.
If necessary, thoroughly clean the sensor
connector to remove filling solution: Using a
disposable pipette, fill the connector with
isopropyl alcohol (70% to 100%), Shake to dry.
Repeat 3 times. Dry overnight. When thoroughly
dry, calibrate the sensor.
Replacing the Junction
Replace the junction when the sensor fails to calibrate with a
reasonable slope and offset, even after you have replaced the
filling solution.
1. Unscrew the reference junction and discard.
2. Replace the filling solution and screw in a new reference
solution.
3. Soak for 15 minutes, then calibrate the sensor.
Keep the junction damp at all times to avoid a
lengthy rewetting process.
Cleaning
Begin with the most gentle cleaning method and continue to
the other methods only if necessary. Do not directly wipe the
glass bulb.
To clean the pH sensor, gently rinse with cold water. If further
cleaning is required, consider the nature of the debris.
To remove crystalline deposits:
lClean the sensor with warm water and mild soap.
lSoak the sensor in 5% HCl solution for 10 to 30 minutes.
lIf deposits persist, alternate soaking in 5% HCl and 5%
NaOH solutions.
To remove oily or greasy residue:
lClean the sensor with warm water and mild soap.
lMethanol or isopropyl alcohol may be used for short
soaking periods, up to 1 hour.
lDo not soak the sensor in strong solvents, such as
chlorinated solvents, ethers, or ketones, such as acetone.
To remove protein-like material, or slimy film:
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Instruction Sheet
lClean the sensor with warm water and mild soap.
lSoak the sensor in 0.1 M HCl solution for 10 minutes and
then rinse with deionized water.
After performing any of these cleaning methods, rinse the
sensor with water, then soak overnight in pH 4 buffer.
Short-term Storage
Up to 1 week: Soak the sponge included with the black storage
cap with pH 4 buffer and install the cap on to the sensor. Use
electrical tape to seal the cap onto the sensor to prevent leaks or
the sponge drying out.
Long-term Storage
Greater than 1 week: Soak the sponge included with the black
storage cap with storage solution (0065370) and install the cap
on to the sensor. Use electrical tape to seal the cap onto the
sensor to prevent leaks or the sponge drying out.
Storage Recommendations
Prior to using the pH sensor after long-term storage, rinse the
sensor with DI water and then soak it in pH 4 buffer for 1 or 2
hours. This will saturate the glass bulb with hydrogen ions and
prepare it for use.
Do not store the pH sensor in DI water
because it will deplete the reference solution
and drastically reduce the life of the sensor.
Replacement Parts
Reference Filling Solution 0056900
Zobell's ORP Solution (1 L) 0032100
pH Calibration Kit (1 L each pH 4, pH 7, pH 10,
DI water) 0032080
Quick Cal (4 x 250 mL) 0033250
Reference Junction Kit (3 junctions, 60 mL
reference filling solution) 0059620
pH Storage Solution (500 mL) 0065370
More solutions and sizes available at www.in-situ.com
800-446-7488 3www.in-situ.com