Wet Labs WETStar Owner's Manual
WETStar
User’s Guide
The user’s guide is an evolving document. Please check our website periodically for
updates. If you find sections that are unclear, or missing information, please let us know.
WET Labs, Inc.
PO Box 518
Philomath, OR 97370
(541) 929-5650
www.wetlabs.com
WETStar User’s Guide (WETStar) Revision N 11 September 2007
WETStar Warranty
Standard Warranty
This unit is guaranteed against defects in materials and workmanship for two
years from the original date of purchase. Warranty is void if the factory
determines the unit was subjected to abuse or neglect beyond the normal wear
and tear of field deployment, or in the event the pressure housing has been
opened by the customer.
To return the instrument, contact WET Labs for a Return Merchandise
Authorization (RMA) and ship in the original container. WET Labs is not
responsible for damage to instruments during the return shipment to the factory.
WET Labs will supply all replacement parts and labor and pay for return via 3
day air shipping in honoring this warranty.
Annual Servicing Extended Warranty
WET Labs will extend the warranty on this unit to five years if it is returned
annually for servicing. This includes calibration, standard maintenance, and
cleaning. Charges associated with this annual service work and shipping are the
responsibility of the customer.
rd
Shipping Requirements
1. Please retain the original Pelican® shipping case. It meets stringent shipping and
insurance requirements, and protects your meter.
2. Service and repair work cannot be guaranteed unless the meter is shipped in its
original case.
3. Clearly mark the RMA number on the outside of your case and on all packing lists.
4. Return instruments using 3
WETStar User’s Guide (WETStar) Revision N 11 September 2007
rd
day air shipping or better: do not ship via ground.
Attention!
Return Policy for Instruments with Anti-fouling
Treatment
WET Labs cannot accept instruments for servicing or repair
that are treated with anti-fouling compound(s). This
includes but is not limited to tri-butyl tin (TBT), marine
anti-fouling paint, ablative coatings, etc.
Please ensure any anti-fouling treatment has been removed
prior to returning instruments to WET Labs for service or
repair.
WETStar User’s Guide (WETStar) Revision N 11 September 2007
Table of Contents
1. Specifications ............................................................................... 1
1.1 Connectors .......................................................................................................... 2
1.2 Test Cable ........................................................................................................... 3
1.3 Delivered Items................................................................................................... 3
2. Theory of Operation ..................................................................... 5
2.1 Chlorophyll WETStar ........................................................................................ 5
2.2 CDOM WETStar ............................................................................................... 5
2.3 Uranine WETStar............................................................................................... 6
2.4 Rhodamine WETStar ......................................................................................... 6
2.5 Phycoerythrin WETStar..................................................................................... 6
3. Instrument Operation.................................................................... 9
3.1 Connector Check................................................................................................. 9
3.2 Electrical Checkout............................................................................................. 9
3.3 Analog Signal Output Check .............................................................................. 9
3.4 Digital Signal Output Check............................................................................. 10
3.5 Deployment....................................................................................................... 10
3.6 Data Collection ................................................................................................. 10
3.7 Data Analysis.................................................................................................... 11
3.8 Upkeep and Maintenance.................................................................................. 11
4. Characterization ......................................................................... 13
4.1 Chlorophyll Characterization............................................................................ 13
4.2 CDOM Characterization ................................................................................... 13
4.3 Uranine/Rhodamine/Phycoerythrin WETStar Characterization....................... 14
4.4 Gain Adjustment ............................................................................................... 14
4.5 Final Testing ..................................................................................................... 15
Appendix A. Chlorophyll WETStar Flow Rate Dependence.......... 17
Appendix B. Calibration Details for Chlorophyll WETStar .............. 18
Introduction and Caveats .............................................................................................. 18
Calibration Protocol...................................................................................................... 18
Appendix C. References ................................................................ 21
WETStar User’s Guide (WETStar) Revision N 11 September 2007 i
1. Specifications
Mechanical
Size:
Weight in air: 1.7 lb (0.8 kg); in water: 0.25 lb (0.1 kg)
Rated depth: 600 meters
Housing: Acetal copolymer
Pressure housing—6.7 x 2.7 in (17.1 x 6.9 cm)
Overall height (including bulkhead connector and tubing fittings)—10.2 in (25.7 cm)
Electrical
Response time: 0.17 sec (analog); 0.125 sec (digital, optional)
Input: 7–15 VDC
Output: 0–5 VDC (analog); 0–4095 counts (digital, optional)
Current draw: < 40 mA (analog); < 80 mA (digital, optional)
Linearity: ≥ 99% R
Optical
Chlorophyll
2
Dynamic ranges: 0.03 –75 µg/l (standard); 0.06–150 µg/l (optional)
Sensitivity: ≥ 0.03 µg/l
Excitation: 460 nm
Emission: 695 nm
CDOM
Dynamic ranges: 1000 ppb (estuarine waters)
250 ppb (near-coastal waters)
100 ppb (open ocean waters)
Sensitivity: 0.100 ppb quinine sulfate dihydrate (other sensitivities available on request)
Excitation: 370 nm (10 nm FWHM)
Emission: 460 nm (120 nm FWHM)
Uranine
Dynamic range: 0–4000 µg/l uranine
Sensitivity: 1 µg/l uranine
Excitation: 485 nm
Emission: 532 nm
Rhodamine
Excitation: 470 nm
Emission: 590 nm
Phycoerythrin
Excitation: 525 nm
Emission: 575 nm
Specifications are subject to change without notice.
WETStar User’s Guide (WETStar) Revision N 11 September 2007 1
1.1 Connectors
Figure 1. WETStar bulkhead connector
Pinout summary for four-pin WETStar connectors
Analog Digital
Socket/Pin Function Socket/Pin Function
1 Common (ground) 1 Ground
2 Analog out 2 Analog +
3 V+ 3 V+
4 Analog return 4 RS-232 (TX)
Figure 2. Optional 6-pin digital WETStar connector
Pinout summary for optional digital WETStar connectors
Pin /Socket Function
1 Power ground
2 RS-232 (RX)
3 Analog ground
4 V in
5 RS-232 (TX)
6 Analog output
Input power of 7–15 VDC is applied to pin 4. The power supply current returns through
the common ground pin. Data is sent out the serial output pin (pin 5).
2 WETStar User’s Guide (WETStar) Revision N 11 September 2007
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