YEO-KAL 801C User manual

Yeo-Kal Electronics Pty Ltd 18/26 Wattle Road, Brookvale NSW Australia
Telephone [phone] Fax [phone]
USER MANUAL
Model
801C Optical DO and Temperature Sensor with
S618 Reader/Logger
Version
1.1
Date
28/7/2021
Information in this document is the copyright of YEO-KAL Electronics Pty Ltd and is subject to change
without notice. No part of this document may be copied or reproduced by any means without the
express written permission of YEO-KAL Electronics Pty Ltd. All trademarks are the property of their
respective companies.
© 2021Yeo-Kal Electronics Pty Ltd

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Contents
INTRODUCTION............................................................................................4
GENERAL DESCRIPTION.............................................................................4
SPECIFICATIONS.........................................................................................4
Reader Unit............................................................................................4
Sensors...................................................................................................5
Temperature...........................................................................................5
Optical DO........................................... Error! Bookmark not defined.
Physical..................................................................................................5
DESCRIPTION OF READER UNIT .................................................................6
Connector Pins.......................................................................................6
Communications....................................................................................7
DESCRIPTION OF PROBE.............................................................................8
Temperature Sensor............................................................................... 9
............................................................. Error! Bookmark not defined.
Optical DO Sensor.................................................................................9
ASSEMBLY....................................................................................................10
CONNECTING THE PROBE ASSEMBLY ......................................................10
OPERATION .................................................................................................11
OPERATING INSTRUCTIONS......................................................................11
KEY PAD DESCRIPTION............................................................................12
UPLOAD DATA FROM S618 TO PC...........................................................13
Clear Store Memory (1) ......................................................................13
Calibration Constants to PC (2)...........................................................13
Store Data out (3) ................................................................................13
Logged Data Out (4)............................................................................13
MAIN MENU LOGGER SETTINGS.............................................................. 15
Start/Stop Logger time (5)...................................................................15
Programming the Reader Unit.............................................................15
Check Battery (6) ................................................................................ 15
SET UP MENU S618 SETTINGS................................................................. 16
Sensor Serial Number (1)....................................................................16
Set Clock (2)........................................................................................16
Configuring the sensors - Assgn/Config Sens (3)...............................16
Live Real Time (4) .............................................................................. 16
Average (5)..........................................................................................16
Data Out Format (6) ............................................................................16
Set Precision (7) ..................................................................................16
Auto Off (8).........................................................................................16
Altitude Correct (9) .............................................................................16
Auto Warning (10) ..............................................................................16

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CALIBRATION.............................................................................................17
TEMPERATURE CALIBRATION..................................................................17
OPTICAL DO CALIBRATION.....................................................................22
INTERNAL BLUETOOTH AND GPS............................................................ 23
BLUETOOTH .............................................................................................23
One off Pairing:...................................................................................23
GPS23
BLUETOOTH AND GPS POWER................................................................. 23
MAINTENANCE...........................................................................................24
READER UNIT MAINTENANCE .................................................................24
BATTERY REPLACEMENT......................................................................... 24
PROBE MAINTENANCE.............................................................................24

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Introduction
The YK801B comes already assembled. The only construction required is to connect the probe assembly to the
reader unit.
General Description
The model 801B Water Quality Analyser Reading Unit is a robust Optical DO field instrument which can be used
for real time water quality measurements or for remote operation using a built in data logger.
The instrument consists of a Optical DO and temperature sensor probes and a reader unit which can store, log
and display data. The probe and reader unit have been designed to be compact, durable and easy to use. Data is
transferred to the reader unit using Bluetooth. The reader unit controls the operation of the instrument,
provides easy access to the data, control, memory and calibration functions. The reader unit contains a real time
clock and all stored data includes the date and time of measurement. Both stored data and calibration
information can be easily down loaded to a computer using the data transfer program, YK Quick Terminal.
The battery charger is supplied with this reader unit.
Specifications
Reader Unit
Display:
TFT LCD with colour selectable display. Both sensors of real time data can be displayed
within one screen and on a computer at the same time.
Memory:
Remote logging –Maximum 65536 samples. Real time (STORE key) maximum 8192
samples. All samples include date, time, GPS and data tag if assigned. Memory’s data
can be kept for 10 years without battery.
Data tags:
You may type your own tag name or automatically generate one by this reader unit
according to the time and date, your older tag name or GPS data. Note: Each data tag
is limited to 18 characters long.
Sample Rate:
Logging time can be easily set from 3 seconds to 1 sample every 24 hours. Display
updates every 1 second.
ADC:
22 bit ADC for probe.
Communications:
Baud rate 9600, 8 data bits, 0 parity, 1 stop bits.
Power:
Battery containing 4.8AH rechargeable lithium battery.
Case:
Impact resistance polycarbonate; waterproof display, keypad, connectors and case.
Dimensions:
100 mm X 35 mm X 200 mm
Weight:
0.4 kg

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Sensors
Temperature
Range: -2 - 50ºC
Accuracy: ±0.05ºC
Resolution: 0.01ºC
Type: Pt. 1000 platinum element
Optical DO
Range: 0 - 200% saturation
0 - 20 mg/l
Accuracy: ±0.5%
Resolution: 0.1%
Physical
Cable length: 3 m or 10 m. Other lengths made to order up to 100 meters.
Dimensions: 26 mm diameter, 270 mm long

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Description of Reader Unit
The reader unit is housed in a tough, durable, high impact polycarbonate case with a keypad and a colour TFT
LCD display mounted on the front panel. On the bottom of the case is a probe/charging connector. The
connector also has a polarising pin so that an incorrect connection cannot be made. Inside the reader unit a CPU
controls the operation of the instrument, the memory store data and the battery power of the instrument.
Figure 1 Water quality analyser reader unit/logger

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Connector Pins
The connector pins on the bottom of the reader unit connectors are numbered in clockwise order from the
polarising pin (see figure 2). The following table lists the purpose of each pin on the connector.
Communications
Pin 1 Ground Negative
Pin 2 +12VDC Positive
Pin 3 RS232 in N/A
Pin 4 RS232 out N/A
Figure 2 Connector pin sockets

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Description of Probe
The probe assembly consists of a sensor, cable and connectors. The body of the probe is made of stainless steel
with a PVC head. The interface cable is permanently connected to the probe body to eliminate the need for
underwater connectors. In the event of the cable being cut, the probe has a waterproof seal between the cable
connection and the internal electronics package. At the other end of the cable is a corrosion and water resistant
connector for connection to the reader unit.
Figure 3 Optical DO and temperature probe

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Temperature Sensor
The temperature sensor consists of a Pt. 1000 platinum element, housed in a stainless steel sheath for
robustness and corrosion resistance. The temperature sensor requires little maintenance. See Figure 4.
Figure 4 Temperature sensor
Optical DO Sensor
Optical DO will emit an infrared light when excited by a blue light which is detected by a filtered
detector. See Figure 5.
Figure 5 Optical DO emitter and detector

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Assembly
The YK801B comes already assembled. The only construction required is to connect the probe
assembly to the reader unit.
Connecting the Probe Assembly
To attach the probe assembly, first unscrew the knurled connector cap from the sensor connector
of the reader unit. The connector cap is attached to the reader unit by a chain so that it can be
replaced whenever the probe assembly is disconnected. To connect the probe assembly, align the
locating pin on the reader unit with the slot on the cable connector and push the cable connector
into the reader unit reciprocal connector then screw home the retaining ring. See Figure 6.
Figure 6 Probe connected to reader unit