Turner Designs Little Dipper User manual

Little Dipper™
User’s Manual
January 07, 2023
P/N: 998-2853
Revision A
TURNER DESIGNS
1995 N. 1st Street.
San Jose, CA 95112
Phone: [phone]
FAX: [phone]

Little Dipper™User’s Manual Rev. A
2
Table of Contents
1
Before Use
1.1
Disposal
3
1.2
Specifications
5
2
Initial Information
2.1
Description
6
2.2
Inspection and Setup
6
2.3
General Information, Precautions & Cleaning
6
3
Instrument Operation and Calibration
3.1
3.2
3.3
Instrument Power Up
Sample Analysis
Calibration Procedure (only needed if Little Dipper fails calibration check)
7
7
7
4
Warranty
4.1
Terms
8
4.2
Warranty Service
8
4.3
Out of Warranty Service
8
Appendixes
A
Linear Range, Quenching and Temperature Considerations
9

Little Dipper™User’s Manual Rev. A
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1 Before Use
1.1 Disposal
WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE) DIRECTIVE
Turner Designs is in the business of designing and selling products that benefit the well-being of
our environment. Accordingly, we are concerned with preserving the surroundings wherever
our instruments are used and happy to work with customers by complying with the WEEE
Directive to reduce the environmental impact resulting from the use of our products.
WEEE Return Process:
To arrange the return of an end-of-life product, proceed as follows:
If you purchased your instrument through a Turner Designs Distributor, please contact your
local representative. They will instruct you where to return the end-of-life product.
If you purchased your instrument directly from Turner Designs please contact Turner
Designs Customer Service
By Phone: [phone]
By Email: Customer Service at [e-mail]
Turner Designs will provide a WEEE RMA Number, a Shipping Account Number, and a Ship
to Address. Package and ship the product back to Turner Designs.
The product will be dealt with per Turner Designs’ end-of-life recycling program in an
environmentally friendly way.

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Little Dipper™User’s Manual Rev. A
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1.2 Specifications
Little Dipper
Linear range
0-199 ppb
Resolution
1 ppb
Power
2 AA batteries, standard or rechargeable
Auto Power Off
After 1 minute of inactivity
Calibration Type
Single point
Light source
LED
Detector
Photodiode
Case
Meets IP67 Standard; dustproof/waterproof
Temperature
41 - 104 °F, (5 - 40 °C)
Size
8.9 x 2 x 1.75 in. (22.6 x 5.1 x 4.5 cm)
Weight
4.3 oz, (120 g)

Little Dipper™User’s Manual Rev. A
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2 Initial Information
2.1 Description
The Little Dipper is a lightweight, handheld fluorometer ideal for field use. Its small size
makes it perfect for the user who needs quick measurements away from the laboratory.
2.2 Inspection and Setup
- Inspection
Upon receiving your instrument, please inspect everything carefully and make sure
all accessories are present. Contact your local distributor for help if there are
difficulties. All shipments include:
•The Little Dipper™
•The User’s Manual and Quick Start Guide on USB Flash Drive
•Laminated Quick Start Guide
•2 - AA batteries
•Shade Cap P/N 023-2850
•Wrist strap P/N 030-8500-1
- Setup
Before the Little Dipper can be used, the supplied batteries
must be installed.
1. On the back side of the instrument, remove the battery
panel by loosening the screws and then gently remove the
back panel.
2. Install the 2 - AA batteries and verify the batteries are
positioned correctly.
3. Replace the battery panel and press it down into position.
4. Hold the battery panel down in place and gently tighten the
screws until it is snug. Do not over tighten the screws.
2.3 General Information, Precautions and Cleaning
•The Little Dipper should NOT come into contact with any organic solvents or
strong acids and bases.
•There are three messages that will display during use of the Little Dipper, “td” for Turner
Designs, “Lb” for Low Battery, and numerical readings from 0-199.
•Rinsing with fresh water and drying the instrument thoroughly with a non-abrasive cloth
after use is recommended.
•Visual inspection of the optical face for fouling
should be done on a regular basis.
•To inspect the optical face, remove the cap:
•If there is any noticeable fouling, use a soft bristle
brush or non-abrasive cloth and soapy water to
clean the optical window. Rinse thoroughly.
•Do not expose the Little Dipper to
temperatures outside the specified range of 5 to 40 °C or damage may
occur to the unit that will not be covered under warranty.
•Do not use instrument under water. Sensor works best when partially
submerged below the Stop line.
Rotate the cap
until the seam
is aligned with
opening. Then
remove the cap.
Reverse steps
to install the
cap.

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3 Instrument Operation and Calibration
3.1 Instrument Power Up
To turn on the Little Dipper, press the power button.
3.2 Sample Analysis
1. Insert the sensor in the sample at an angle with the cap fully submerged.
2. Shake gently to make sure all bubbles are purged from the cap. Then vertically
straighten the device.
3. Press the READ button.
3.3 Calibration Procedure
Note: Little Dipper is calibrated when shipped. Only re-calibrate if unit does not read
100 ± 3% for the appropriate Standard Solution. Use P/N 10-608 (PTSA 100 ppb).
Calibrating 100
1. Prepare a 500 mL darkened beaker with the standard solution.
2. To calibrate, press and hold the READ button while unit is off. If taking measurements
with the cap, ensure cap is still on the Little Dipper while doing all calibrations. If
you choose to measure without the cap, then have calibrations with the cap off.
3. While holding the READ button, press and hold the Power button until 100 appears on
the screen. Release both buttons.
4. Insert the sensor in the standard at an angle with the cap fully submerged, shake gently
to make sure all bubbles are purged from the cap, straighten sensor vertically from an
angle, and press the READ button.
5. The display will flash “td” four times and then the unit will automatically turn off.
At this point the Little Dipper is calibrated. You can confirm the calibration by turning the
unit on and pressing the READ button while the unit is in the standard solution. Readings
should be 100 ± 3%.
Calibrating 0
6. Repeat Step 2 from Calibration 100 to begin calibration for 0.
7. Repeat Step 3 of continuing to hold both buttons, the 100 will appear and after 15
seconds, the 0 will now display. Release both buttons.
8. Hold sensor away from yourself at least 4 feet away from any reflective surfaces, direct
sunlight, or the ground and press the READ button.
9. The display will flash “td” four times and then the unit will automatically turn off.
You can confirm the calibration by turning the unit on and pressing the READ button while
the unit is facing away from reflective surfaces and the ground. Display should show 0.
READ

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4 Warranty
4.1 Terms
Turner Designs warrants the Little Dipper and accessories to be free from defects in
materials and workmanship under normal use and service for a period of 12 months from
the date of shipment from Turner Designs, with the following restrictions:
•Turner Designs is not responsible for replacing parts damaged by accident or neglect.
Damage from corrosion is not covered. Damage caused by customer modification of the
instrument is not covered. Instrument must be used as described in the User’s Manual.
•This warranty covers only Turner Designs products and is not extended to equipment
used with our products. We are not responsible for incidental or consequential
damages, except in those states where this limitation is not allowed. This warranty gives
you specific legal rights and you may have other rights which vary from state to state.
•Damage incurred in shipping is not covered.
4.2 Warranty Service
To obtain service during the warranty period, the owner shall take the following steps:
1. Write, email, or call the Turner Designs Technical Support department and describe as
precisely as possible the nature of the problem.
Phone: [phone]
Email: [e-mail]
2. Carry out any adjustments or tests as suggested by the Technical Support Department.
3. If proper performance is not obtained you will be issued a Return Authorization number
(RMA). Package the unit, write the RMA number on the outside of the shipping carton,
and ship the instrument, prepaid, to Turner Designs. If the failure is covered under the
warranty terms, the instrument will be repaired and returned free of charge, for all
customers in the contiguous continental United States.
For customers outside of the contiguous continental United States who purchased
equipment from one of our authorized distributors, contact the distributor. If you
purchased directly, contact us. We will repair the instrument at no charge. Customer
pays for shipping duties and documentation to Turner Designs. Turner Designs pays for
return shipment (custom duties, taxes and fees are the responsibility of the customer).
4.3 Out of Warranty Service
Follow steps for Warranty Service as listed above. If our Technical Support department can
assist you by phone or correspondence, we will be glad to, at no charge. Repair service will
be billed on a fixed price basis, plus any applicable duties and/or taxes. Shipment to Turner
Designs should be prepaid. Your bill will include return shipment freight charges.
Address for Shipment:
Turner Designs
1995 N. 1st Street
San Jose, CA 95112