Yosemite Y504-A User manual

Y504-A
Online Optical Dissolved Oxygen
Sensor
User Manual
Yosemite Technologies Ltd.
V 1.0

contents
Preface........................................................................................................................................3
Overview.....................................................................................................................................4
Features：..........................................................................................................................4
Introduction............................................................................................................................ 4
Cable Definition.................................................................................................................6
Technical Specifications.................................................................................................... 6
Installation..............................................................................................................................7
Part List...............................................................................................................................7
Before use.......................................................................................................................... 7
Sensor Installation............................................................................................................. 7
Calibration..............................................................................................................................8
Calibration Solution Preparation......................................................................................8
Calibration (take 2-point calibration as an example).................................................... 8
Appliances and raw materials required...........................................................................9
Maintenance............................................................................................................................ 10
Maintenance Schedule................................................................................................... 10
Maintenance.................................................................................................................... 10
Attention.......................................................................................................................... 11
Trouble Shooting.................................................................................................................12
Quality Assurance................................................................................................................13

Preface
Dear customer
Thank you for your Yosemite Technologies’ instrumen. Reading the entire manual before use is
highly recommended for operation and maintenance the instrument and out of unnecessary
trouble.
Please observe the operating procedures and precautions in this manual.
To make sure the effective after-sales protection provided by the instrument, please do not use
any operation or maintenance other than which mentioned in the manual.
Due to non-compliance with the precautions specified in this manual, any fault and loss caused
shall not be covered by the warranty, and the manufacturer shall not bear any relevant
responsibility. If you have any questions, please contact our after-sales service department or
representative.
Carefully unpack the instrument and accessories from the shipping container, and inspect for
possible damage during shipping. Check received parts with items on the packing list. If any parts
or materials are damaged or missing, please contact Yosemite Technologies customer service or
the authorized distributor immediately.
Save all packing materials until you are sure that the instrument functions properly. Any damaged
or defective items must be returned in their original packaging materials.

Overview
Yosemitech Optical dissolved oxygen sensor measures dissolved oxygen using the principle of
oxygen dynamic luminescence quenching technique. When blue light excites sensor film, the
sensing film emits red light. The phase difference between the blue excitation and returned
red emission is measured, and the result is used to calculate DO concentration.
Features：
Membraneless, no electrodes design
No oxygen consumption
Flow Independent
Automatic temperature compensation
No H2S Interference
Low Drift, fast response, and more accurate
Low Maintenance, low operating cost
Easy sensor cap replacement
RS-485; MODBUS protocol compatible
Introduction

structure chart：
dimension
26x151 mm(Φ xL)
Y504 structure chart

Cable Definition
1、Power Supply Requirements
Power Supply DC 8-26V ±10%，Current <50mA
2、Sensor Cable
4 wire AWG-24 or AWG-26 shielding wire. OD=5mm
Technical Specifications
名称
参数
Range
0-20mg/L or 0-200% Saturation
Response Time
10 sec
Housing IP Rating
IP68
Accuracy
±1%
Drift
<1% per year
Working Temperature Range
0 ~ 50℃
Temperature Accuracy
±0.2℃
Interface
Support RS-485，MODBUS protocols
Construction
3/4 inch NPT
Power Requirements
DC 6~12V +/-5%，current <50mA
Temperature Sensor Type
NTC
Sensor OD
26mm
Sensor Length
177.5 mm
Cable Length
10m standard; 5m, 15m, and 30m optional
Calibrations
Support one point and two-points calibrations
Sensor Cap Lifetime
1 Year（at normal use）
Body materials
POM and Stainless steel
The above technical specifications are tested under standard solution in laboratory
environment.。
1, Red—Power (VCC)
2, White—485 Date_B ( 485_B)
3, Green ---485 Date_A (485_A)
4, Black --- Ground (GND)
5, Bare wire ---- shield

Installation
Part List
Item
Number
Note
Y504-A Sensor
1
Cable
1
10m
protective cover
1
Rubber protective Cap
1
Before use
1) Take off the protect cap: Please take off the protect cap of Optical dissolved
oxygen sensor , before installation and keep them properly for future use.Meanwhile,
tighten the protective cover.
Sensor Installation
1) Wiring and power supply:
•The female and male connector of sensor cable should be screwed tightly to
avoid moisture incursion
•Do not use the sensor cable to pull the sensor! It is required to install sensor in a
secure and stable mounting bracket.
•Make sure power supply voltage is correct before power on.
2) Sensor installation:
•It is recommended to install the sensor vertically with electrodes facing down.
•Considering water level change, the sensor should be installed 30cm below
water level. The sensor should not be installed no more than 2m below water
surface for maintenance purpose.
•The sensor must be securely installed to avoid damage caused by water flow and
other things.

Calibration
PC tool name: SmartPC(DO).exe. (Please scan the QR code on
the right to download the application software).
Note: If custom development is needed, please contact
Yosemitech Customer Service.
Calibration Solution Preparation
Preparation for zero oxygen environment: take 200mL distilled water and pour it into the
prepared beaker, then add anhydrous sodium sulfite, add and stir at the same time, until
anhydrous sodium sulfite is insoluble and solid crystallization occurs, then the standard
solution can be regarded as close to 0 oxygen.
Preparation for 100% oxygen environment: Prepare 1 beaker, take 200mL purified water
(or distilled water) and pour it into the cup, add to the air pump, and fully aerate the solution
(at least 30 minutes).
Note: If the field conditions really do not allow, the sensor can be directly put into the air
(calibration accuracy will be slightly deviated).
Calibration (take 2-point calibration as an example)
Restore user calibration data by default, K=1, B=0(see modbus documentation for
details).
Take the sensor out of the zero oxygen, wipe the sensor measurement end face with a paper
towel, put the sensor into 100% environment (air), read the value of dissolved oxygen, wait
for the data to stabilize, the value is close to 1 (Saturation is 100%), and record the value as Y.
Place the sensor in the prepared zero-point solution, immerse the front end of the sensor
completely in the solution, read the value of dissolved oxygen, and wait for the data to
stabilize, with the value approaching 0.01 (Saturation is 1%), for example
Dissolved oxygen = 0.015, recorded as X.
Record K and B values according to the following formula:
K=(1-0)/(Y-X), B= - KX
Write K, B values to the sensor.

(See modBus documentation)
Yosemitech Sensor has also developed pc-based calibration software for Y504 dissolved
oxygen sensor. You only need to connect the probe to the calibration software through the
computer interface, and you can easily complete the calibration of the sensor according to
the software prompts.
Appliances and raw materials required
Anhydrous sodium sulfite powder
Distilled water or deionized water (Watsons distilled Water)
Beakers, gloves, stirring rod, air pump

Maintenance
Maintenance Schedule
Unlike traditional electrical chemical sensors, optical DO sensors require low maintenance.
There are no need for frequent solution filling and calibrations.
Maintenance task
Frequency
Sensor cleaning
Every 30 days
Sensor and sensor cap inspection
Every 30 days
Sensor cap replacement
Every one year
Calibration（if required of agency）
Calibration based on required schedule
Maintenance
1) Clean the sensor surface：Wash the outer surface of sensor with tap water, if there is
still residue, using soft brush, for some stubborn dirt, household detergent can be
added in tap water to clean.
2) Clean the cap outer surface：Remove the protective cover , flush the dirt on the light
window of the sensor with clean water, and finally put the cover on;If you need to
wipe it, please wipe it gently with a soft cloth and do not scratch it forcefully.
Otherwise, once the fluorescent film is scratched or scratched, the sensor will not
work properly
3)Clean the cap inner surface:
If water vapor or dust gets inside the fluorescent cap, the cleaning steps are as follows:
(1) Remove the fluorescent cap
(2) Rinse the inner surface of the fluorescent cap with tap water
(3) For dirt containing fat and oil, wash it in warm water with household detergent
(4) Rinse the inner surface of the fluorescent cap with deionized water
(5) Gently dry all surfaces with a clean flannelless cloth and place in a dry place to allow water
to completely evaporate
4) Check the cable：inspect the sensor cable if there is damage.
5)Store the cap ：Regular electrode maintenance requires cap to be stored ina
protective cover with a damp sponge and checked and watered regularly, so as to
keep the fluorescent film in a moist state for a long time.If the sensor fluorescent cap

head is dry for a long time, the measurement results will drift, and it needs to be
soaked in water for 48 hours before continuing to work.
Attention
Protect the inner surface of the fluorescent cap from sun exposure.
Do not touch the fluorescent film with your hands.
Avoid applying any mechanical stress (pressure, scratch, etc.) directly to the
fluorescent film during use.

Trouble Shooting
Table 5-1 lists the symptoms, possible causes, and recommended solutions for
common problems encountered with the Y560-A sensor. If your symptom is not listed,
or if none of the solutions solves your problem, please contact us.
Table 5-1 Troubleshooting
ERROR
POSSIBLE CAUSE
SOLUTION
No data displayed on
controller (if sensors
are connected)
Connection issue
Reconnect sensor to controller
Cable failure
Contact customer service
Bad sensor cap or loose
sensor cap
Reinstall sensor cap or replace
Unstable DO reading
Dirty sensor cap
Clean sensor cap
Damaged sensor cap
Replace sensor cap
Sensor cap expired
Hardware failure
Contact customer service
Bad Temperature
reading
Bad connection
Reconnect sensor to controller
Dirty temperature sensor
Contact customer service

Quality Assurance
Warranty period:
Sensor warranty period is 1 year
Electrode warranty period is 4 months (Non-chemical environment, Non industrial
wastewater).
If there are defects found during the warranty period, Yosemite technologies
promises to repair or replace the defective products, or return the payment of
product except the charge for the first time for transport and related formalities. In
the warranty period, repair or replacement of any product will only enjoy the rest of
the original warranty.
After receiving feedback for the product quality problems from the customer,
Yosemite technologies will confirm whether the product need repair within two
weeks; It can’t be returned without approval to repair the product.
This warranty does not include the following：
•Damage caused due to force majeure, natural disasters, social unrest, war
(published or unpublished), terrorism, civil war or any government forced.
•Damage caused due to improper use, negligence, accident, or caused by the
improper application and installation.
•Freight for the product shipped back to Yosemite technologies.
•Freight for parts or products express or express delivery within the warranty.
•Travel expense for repair in local in warranty
The quality assurance includes all content of products provided by Yosemite
technologies.
It constitutes the final, complete and exclusive statement about the quality
guarantee, no person or agent is authorized in the name of Yosemite technologies to
develop other warranty.
As described above, the remedial measures such as repair, replacement or return the
payment for product is not in violation of the warranty, and it aim at our own
products only. Based on the strict liability or other legal theory, Yosemite
technologies is not responsible for defects or any other damage due to careless
operation, including the subsequent damage with a causal connection between
these situations.

Yosemite Technologies Ltd.
18 Dongchang Rd. Building 25, Suzhou Industrial Park, 215126, China
ZIP code：215123
Tel：[phone]
Fax：[phone]
E-mail：sale[email protected]
www.yosemitech.com