In-Situ RDO Sensor for TROLL 9500: Installation, Calibration, and Care (purchased after 09/2008) - Manual

Instruction Sheet
TROLL ®
9500 Water
Quality Instrument
RDO ® Optical Dissolved Oxygen Sensor
Cable Connect 0085070
Direct Connect 0084310
DESCRIPTION
The In-Situ RDO
® optical dissolved oxygen sensor measures dissolved
oxygen (DO) using the principle of “dynamic luminescence quenching.”
Certain molecules, called “lumiphores,” fluoresce when excited by light of
a specific wavelength. Oxygen molecules act to quench this fluorescence.
The lumiphores in the sensor are embedded in a gas-permeable sensing
foil in a replaceable cap.
The sensor optics include a lens, blue LED and filter, red LED and filter,
and a photodetector. When the blue LED emits light, the sensing foil emits
red photons; the presence of oxygen in the foil causes a reduction in red
light detected by the photodiode. The phase difference between the blue
excitation light and the returned red light is measured, and the result is
used to compute DO.
This method measures the "phase" (or delay) of the returned signal, and is
thus based on the “lifetime” rather than the “intensity” of the luminescence.
REquIRED MaTERIalS
To use the RDO sensor, you will need the following items:
TROLL • ® 9500 instrument
PC or RuggedReader • ® handheld PC
Most recent Win-Situ • ® 4 or Pocket-Situ 4 software 1
RDO sensor package •
Alkaline battery package (included with the TROLL 9500 instrument) •
Communication cable •
Most recent version of TROLL 9500 firmware •
TROLL • ® Com cable
1 Make sure to use the most recent version of Win-Situ software. Free updates are available at
www.in-situ.com. You must have the most recent software version to allow firmware updates.
uNPaCk ThE RDO CablE CONNECT SENSOR
The RDO cable connect sensor arrives installed in a 3-part adapter/restrictor/
nose cone assembly with the sensor cap in a black canister. Remove the
black restrictor and nose cone from the sensor and adapter assembly.
uNPaCk ThE RDO DIRECT CONNECT SENSOR
The RDO direct connect sensor ships in a box as shown below:
INSTallINg ThE RDO SENSOR CaP
Remove the red protective dust cap from the sensor and 1. save it for later use.
Protective dust cap Sensor cap
Use the supplied lens wipe to clean the lens on the sensor, if necessary. 2.
Remove the RDO sensor cap from its shipping sleeve. 3.
Align the arrow on the cap with the index mark on the sensor and 4.
firmly press the cap onto the sensor, without twisting, until it seals over
the probe body.
Keep the cap in its sealed packaging until you are ready to install it.
Make sure that the o-ring is not pinched or rolled inside the cap.
The cap's lifetime is 1 year after the first reading has been taken.
Install by the date printed on the packaging.
The soft Cal Cup insert enables
calibration of the basic sensors
when the RDO sensor is installed.
It also contains an extra screw for the
adapter plate.
Adapter
Nose cone
RDO sensor
Restrictor
Lens wipe
Sensor cap
RDO sensor
Instruction sheet