GF Signet 2610 User Manual

Signet 2610 Process Optical Dissolved Oxygen Sensor

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*3-2610.090*

3-2610.090 Rev. C 08/13

Introduction

System Description

Your new RDO® Pro is a rugged, reliable sensor designed to
deliver accurate dissolved oxygen (DO) data across a wide
measuring range while reducing maintenance costs. It features
the latest optical technology for DO measurement.

The RDO Pro system is available in two versions. The 3-2610-31
has 4 to 20mA current loop output, Modbus RS485, and SDI-12
connectivity. The 3-2610-41 includes S3L communications to
support both the 8900 and 9900 Signet products in place of the
SDI-12 output.

The RDO Pro system consists of the following:

English

Operator's Manual

• 10 m (32.8 ft.) cable with stripped and tinned ends

• Black sensor body with removable nose cone

• Optical DO sensing cap

• Titanium thermistor

Cable end, stripped and tinned

Nose cone

Thermistor

Sensor cap
(not visible)

Dimensions

20.3 cm

68.6 mm
(2.7 in.)

43.7 mm
(1.72 in.)

(8.0 in.)

Serial Numbers

The instrument part number, code number and serial number is
engraved on the side of the unit.

RDO is a registered trademark of In-Situ® Inc., Fort Collins, CO USA

Introduction

Unpacking the Sensor

Sensor

Shipping/Storage sleeve

Dust cap

Nose cone

1. Remove the RDO

®

sensor from the box and other

packaging materials.

2. Unscrew the nose cone from the sensor and
remove the red protective dust cap from the
sensor. Save the dust cap for later use.

3. Remove the sensor cap from its shipping/storage
sleeve.

4. Align the two lines on the cap with the fl at part of

the sensor and fi rmly press (DO NOT TWIST) the

cap onto the sensor until it seals over the probe
body.

• CAUTION: Twisting the sensor cap can

permanently damage both the cap and the
sensor.

• Avoid allowing moisture, including atmospheric
humidity, inside the cap. Keep the cap in its
sealed packaging until you are ready to install
it. Install promptly. Make sure that O-ring
grooves are dry and the O-ring is not rolled or
pinched inside the cap.

• The cap's lifetime is 1 year after the fi rst
reading has been taken. Install by the date
printed on the packaging.

Align flat side of the tip
with lines on cap

5. Reattach the nose cone

Calibration

Calibration is not required. The unit, as shipped from
the factory, will measure within 2% of reading for the
life of the sensor cap.

Replacing the sensor cap will keep the reading within
2% accuracy.

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2610 DO Sensor

Sensor Deployment

The cable end of the RDO® Pro is internally threaded (1¼ - 11½ NPT) and can
be attached to a externally threaded pipe.

When deployed, make sure that the nose cone and thermistor are completely
submerged.

Care and Maintenance

Cleaning the Sensor Cap

1. Leave the cap and nose cone on the sensor!

2. Rinse the sensor with clean water from a squirt bottle or spray bottle.

3. Gently wipe with a soft-bristled brush or soft cloth if biofouling is present.
Use Alconox® to remove grease.

4. If extensive fouling or mineral build-up is present, soak the cap end in
vinegar for 15 min., then soak in deionized water for 15 min.

Sensor Deployment

1¼ in. NPT

with 10 m cable

Do not use organic solvents - they will damage the foil.
Do not remove the cap from the sensor prior to brushing.

Cleaning the Optical Window

Perform only when changing the cap. See full instructions in the sensor
replacement cap kit.

Do not wet the lens area with water or any solution.

Remove the cap and gently wipe the window with the supplied lens wipe.
Use only the supplied lens wipe for cleaning. Do not use any other wipe
or material.

Cleaning the Sensor Body

With the sensor cap installed on sensor, gently scrub sensor body with a soft­bristled brush or nylon dish scrubber. Use Alconox to remove grease or other
matter. Soak in vinegar and deionized (DI) water to remove mineral deposits or
extensive fouling as in step 4, above.

Cap Storage

• Prior to installation: Store in factory supplied container.

• Installed: Keep or store in the calibration chamber with the storage cap

attached and a few drops of clean water.

32610 DO Sensor

Care and Maintenance

Sensor Cap Replacement

Replace the Sensor Cap

The sensor cap has a 1-year life after the instrument
takes its fi rst reading. Install the cap by the date
printed on the package. Replacement caps are
available from Georg Fischer, part number 3-2610.392
(159 310 122).

Avoid allowing moisture, including atmospheric humidity,
inside the cap. Keep the cap in its sealed package until
you are ready to install it. Install promptly. Make sure
that O-ring grooves are dry and that the O-rings are not
rolled or pinched inside the cap.

Lightly coat with lubricant
Install 2 O-rings

Clean lens and allow to dry

Replace cap in
a dry environment

Sensor Cap Replacement Kit Contents:

• Sensor cap

• O-rings (2)

• O-ring lubricant

• Lens wipe

• Instruction sheet

1. Pull the used sensor cap off of the sensor. DO

NOT TWIST!

2. Remove the existing O-rings from the sensor.

3. Use a lint-free cloth to remove any moisture from

the sensor body. NOTE: Make sure that the O-ring

grooves are dry. Avoid touching or cleaning the
lens with anything other than the supplied lens
wipe.

4. Use your fi nger to apply a thin layer of lubricant
around the O-ring grooves. Place the O-rings on

the sensor. NOTE: Do not transfer lubricant to the

lens or sensor pins.

5. Clean the lens on the sensor with the wipe
provided in the kit and allow to dry thoroughly.
Inspect for scratches or dirt.

6. Remove the new cap from its sealed package.

7. Align the arrow on the cap with the index mark on
the sensor and press it fi rmly until it seals over the

probe body. DO NOT TWIST. Make sure that the

O-rings are not pinched or rolled between the cap
and sensor.

8. Replace the nose cone on the sensor.

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2610 DO Sensor