HyQuest Solutions AD375MA User manual

AD375MA
User Manual

© 2022 HyQuest Solutions 2
Table of Contents
Disclaimer 3I
II Scope of Delivery 4
III Safety Instructions 5
Part I Introduction 6
Part II Installation 7
Part III Configuration 13
Part IV Operation 14
4.1 Screwless Terminals ..................................................................................................................................... 14
4.2 External Power ............................................................................................................................................... 14
4.3 4-20mA Interface ......................................................................................................................................... 15
4.4 LCD Screen ...................................................................................................................................................... 15
4.5 SDI-12 Compliant Commands .................................................................................................................... 16
Part V Maintenance 20
Part VI Troubleshooting 21
Part VII Repair 23
Part VIII Technical Data 24
Part IX Obligations of the Operator and Disposal 25
9.1 Obligations of the Operator ....................................................................................................................... 25
9.2 Dismantling / Disposal ................................................................................................................................ 25
Part X Appendices 27
10.1 Appendix A Surge Protection .................................................................................................................... 27
10.2 Appendix B SDI-12 to RS232 Interfacing ............................................................................................. 28
10.3 Appendix C Changing Pulley Sizes ........................................................................................................... 30

Copyright Notice: No parts of this work may be
reproduced in any form or by any means without the
written permission of the publisher. HyQuest
Solutions waives copyright for users to print out
parts of the documentation in hard copy for their
own use only.
Trademark Notice: HyQuest Solutions (HS) and
KISTERS products and services referred to in this
document are trademarks or registered trademarks
of HyQuest Solutions or KISTERS AG. Other product
names used may or may not be the trademarks of
their respective owners.
© 2020 HyQuest Solutions, a KISTERS Group
Company. Any rights not expressly granted herein
are reserved.
The information provided in this manual was deemed
accurate as of the publication date. However, updates
to this information may have occurred.
This manual does not include all of the details of
design, production, or variation of the equipment
nor does it cover every possible situation which may
arise during installation, operation or maintenance.
HyQuest Solutions shall not be liable for any
incidental, indirect, special or consequential damages
whatsoever arising out of or related to this
documentation and the information contained in it,
even if HyQuest Solutions has been advised of the
possibility of such damages.
Any errors found in any HyQuest Solutions product
should be reported to HyQuest Solutions where
every effort will be made to quickly resolve the
problem.
This document is public.
3© 2022 HyQuest Solutions
I Disclaimer

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II Scope of Delivery
§ AD375MA Shaft Encoder Unit w/axle and its knurled bolt w/set screw
§ Allen key suitable for set screw
§ Manufacturing Compliance Certificate
© 2022 HyQuest Solutions 4

§ Read the user manual including all operating instructions prior to installing, connecting and powering up the HyQuest
Solutions AD375MA. The manual provides information on how to operate the product. The manual is intended to be
used by qualified personnel, i.e. personnel that have been adequately trained, are sufficiently familiar with
installation, mounting, wiring, powering up and operation of the product.
§ Keep the user manual on hand for later reference!
§ If you encounter problems understanding the information in the manual (or part thereof), please consult the
manufacturer or its appointed reseller for further support.
§ HyQuest Solutions AD375MA is intended to be used in hydrometeorological or environmental monitoring
applications.
§ Before starting to work, you have to check the functioning and integrity of the system.
§ Check for visible defects on the AD375MA, this may or may not include any or all of the following mounting
facilities, connectors and connections, mechanical parts, internal or external communication devices, power
supplies or power supply lines, etc.
§ If defects are found that jeopardize the operational safety, work must be stopped. This is true for defects found
before starting to work as well as for defects found while working.
§ Do not use the HyQuest Solutions AD375MA in areas where there is a danger of explosion.
§ The present user manual specifies environmental/climatic operating conditions as well as mechanical and electrical
conditions. Installation, wiring, powering up and operating the HyQuest Solutions AD375MA must strictly comply with
these specifications.
§ Perform maintenance only when tools or machinery are not in operation.
§ If guards are removed to perform maintenance, replace them immediately after servicing.
§ Never make any electrical or mechanical diagnostics, inspections or repairs under any circumstances. Return the
sensor to the manufacturer’s named repair centre. You can find information on how to return items for repair in the
relevant section of the HyQuest Solutions web site.
§ Disposal instructions: After taking the HyQuest Solutions AD375MA out of service, it must be disposed of in
compliance with local waste and environmental regulations. The HyQuest Solutions AD375MA is never to be disposed
in household waste!
§ Inputs and outputs of the device are protected against electric discharges and surges (so-called ESD). Do not
touch any part of the electronic components! If you need to touch any part, please discharge yourself, i.e. by touching
grounded metal parts.
III Safety Instructions
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Introduction
1Introduction
Thank you for choosing our product. We hope you will enjoy using the device.
HyQuest Solutions manufactures, sells, installs and operates quality instrumentation, data loggers and communication
technology. Products are designed with passion for environmental monitoring and with a deep understanding of the
quality, accuracy and robustness needed to fulfil the requirements of measurement practitioners in the field.
The present User Manual will help you understand, install and deploy the device. If, however, you feel that a particular
information is missing, incomplete or confusing, please do not hesitate to contact us for further support!
The AD375MA is a rugged, microprocessor-based, power-efficient shaft encoder for reliable and accurate water level
measurement. The built-in digital technology determines the absolute water level from the reference level and the
relative rotational movements at level increase or decrease. This eliminates any further calculation or conversion in
downstream data acquisition devices.

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Installation
2Installation
The encoder is readily adapted to float pulley wheels with beaded or borehole floatline, tape chain and sprockets and
gear drives. Provided on the base of each encoder are two threaded holes for levelling screws.
Beaded Float Line
§ Two adjustable end hooks (part EH01) are provided for attaching the beaded float line to the float and the
counterweight. The length of the float line should be such that the counterweight will not run into the shelf or pulley
when the float is at a low stage or strike the bottom of the float well when the float is at the highest stage. Float and
counterweight should pass each other and should have adequate clearance from the sides of the stilling well.
§ Beaded line should be cut about 1/16 inch past a bead to prevent fraying.
§ Attach the float line to the float and lower it to the water. Pass the float line over the pulley making sure that the cable
beads (or tape perforations) engage the respective recessed (or spines) on the pulley. Attach the counterweight and
lower it into position.

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Installation
Borehole Float Line
§ Attach borehole guide pulleys to mounting bracket. Ensure guide sheave grooves line up with float pulley groove.
§ Two adjustable end hooks (part EH01) are provided for attaching the float line to the float and the counterweight. The
length of the float line should be such that the counterweight will not run into the shelf or pulley when the float is at a
low stage or strike the bottom of the float well when the float is at the highest stage. Float and counterweight should
pass each other and should have adequate clearance from the sides of the Borehole.
End Hook Assembly
§ Cut the beaded line approximately 2 mm (1/16") past a bead to prevent fraying. Attach end hook by :-
§ Unscrew the plate from the adjustable hook.
§ Place the beaded line between the two plates and then tighten the screws on the plate.
§ Allow for a bead to be trapped just below the locking plate. Make sure that the line is sitting perpendicular to the plate.
Electrical Installation
A +12V power source must be connected to the SDI-12 / Power port as shown on page 8, to provide power to the
AD375MA electronics.
Once external power is connected, press the “Scroll” button and step to the “Battery Voltage” display. Press and hold the
“Select” button until the display shows “Lithium Backup” – No. Press the “Select button again and the “No” will start
flashing. Press the “Scroll” button to change the No to a “Yes”. Press the “Select” button to stop the Yes from flashing. Press
the “Scroll” button to step back to the main displays.
(The internal lithium battery is used to power the internal electronics during transport, but it doesn’t power the circuitry
to monitor the shaft rotation position. If this were selected while external 12V power wasn’t present, the battery would
only last for about 1 to 2 months. So with Lithium Backup set to “Yes”, the lithium battery will allow the water level to be
tracked in the unlikely event that the external 12V power is not present.)

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Installation

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Installation
Shaft Encoder Typical Bore Hole Set Up Using Guide Pulleys.

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Installation

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Installation

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Configuration
3Configuration
1. If using the SDI-12 interface, set the required address by stepping to the “Sensor Addr” menu, and pressing the “Select”
button and then use the “Scroll” button to set the address from 0 to 9.
2. If using an SDI-12 logger, make sure the “Comms Type” is set to SDI-12. If using an RTU with an SDI-12 to RS232
adapter then set the “Comms Type” to RS232.
3. Use the staff gauge in the river to measure the water level (1.450m)
4. Step to the “Set Level” menu and set it to 1.450m
If operating in SDI-12 mode, setup is complete.
If operating in 4-20mA mode then continue with step 5.
5. Estimate the range over which the water level will change. (eg. Min level = 1.000m : Max Level = 8.000m)
6. Step to the “4mA / 20mA Level” menu
Set the 4mA level to 1.000m
Set the 20mA level to 8.000m
When the water level is at 1.000m the 4-20mA current will be 4.000mA
When the water level is at 4.500m the 4-20mA current will be 12.000mA
When the water level is at 8.000m the 4-20mA current will be 20.000mA
7. The range in this example is 8.000 – 1.000 = 7.000m
Set the logger range to 7.000m (eg. ML420 range is set with TxR=7.000)
8. The offset in this example is 1.000m
Set the logger offset to 1.000m (eg. ML420 offset is set with RvHR=1.000)
9. Set the logging interval and transducer warmup period in the data logger.
(eg. Say ML420 interval is 15mins and warmup is 1 sec then TXI=015/01)
(The AD375MA 4-20mA current is ready 200mS after loop power is applied)
Note: Setting the 4-20mA range to the smallest possible will give the best resolution on a 4-20mA interface!

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Operation
4Operation
This chapter contains the following subsections:
§ Screwless Terminals
§ External Power
§ 4-20mA Interface
§ LCD Screen
§ SDI-12 Compliant Commands
4.1 Screwless Terminals
The plug in terminal block shown is a screwless terminal that keeps a constant tension on the wire that is inserted. (The
mating socket on the front panel of the AD375MA is sealed with a waterproofing gasket.)
4.2 External Power
Even though the Shaft Encoder's have an internal lithium battery, the unit should only be operated if +12VDC (9.0V to
16VDC) power is connected. This guarantees continuing correct pulse counting and SDI-12 operation. (The internal
lithium batteries are for backup purposes only – it will allow the water level to be continuously measured for up to 2
months with no external +12V ! )
An adequate 12VDC (9 to 30VDC) battery and charger option should be used if the optically isolated 4-20 mA current
loop is to be powered continuously and independently of the telemetry module or data logging equipment.
The AD375MA must have +12VDC power (9.0V to 16V DC) connected for correct operation.
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Operation
4.3 4-20mA Interface
The 4-20mA interface in the AD375MA is optically isolated from the 0V and +12VDC on the right hand end of the
connector. The 4-20mA circuitry must be powered by the loop.
To conserve power, the data logger switches power to the 4-20mA circuit only when it wants to make a measurement.
(The 4-20mA current will be ready to read 200mS after applying loop power.)
(See Configuring the AD375MA for configuring the 4-20mA interface.)
4.4 LCD Screen
There are 8 LCD screens available. Some screens display internal data and some allow parameters to be changed. The
screens are:
LCD SCREEN
DESCRIPTION
AD375MA S/W
5.1
Level: 9.392 m
Display model, S/W Rev and present river level
13

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Operation
LCD SCREEN
DESCRIPTION
Battery Voltage
3.6V / 12.8V
Display internal and external battery voltage.
NOTE: Press ‘Select’ to go to “Lithium Backup” menu.
Lithium Backup
No
Internal lithium battery backup can be enabled by setting this option to yes. (See Electrical
Installation )
Sensor Addr: 2
Sensor ID:
12345
Display Sensor SDI-12 address and external d 5 digit ID
Comms Type:
SDI-12
Allows the comms type of the SDI-12 port to be selected - normal setting is "SDI-12".
(When "RS232" is selected the critical SDI-12 timing is removed)
4mA/20mA
Level:
5.0 / 25.0 m
Allows the 4mA level and 20 mA level to be viewed and changed. (Select button must be pressed and
held for 10 secs to enter "Set 4mA Level" mode)
Quad Direction:
Normal
Allows the quadrature direction for "rising" water to be changed.
(Normal / Reversed)
Set Level:
12.392 m
Allows the present River Level to be preset
RS 232/SDI-12 SELECTION
The SDI-12 protocol has very strict timing requirements. The operator may use the SDI-12 to RS232 adaptor cable and
then communicate to the SDI-12 port using the RS232 from a PC. The "RS232" option must be selected via LCD screens. In
this mode all of the timing/break requirements of the SDI-12 are removed. Commands may be typed from a terminal
program such as "Hyperterm".
Note you must select 1200 baud, 7 bits, even parity and no handshaking.
If communications is via an SDI-12 device, you must select the SDI-12 option via the LCD screen.
4.5 SDI-12 Compliant Commands
SDI-12 V1.3 COMPLIANT COMMAND SET (CRC commands are implemented)
(Please note the letter ‘a’ in the commands below refer to the SDI-12 address 0, 1, 2,….9)
Name
Command
Response
Break
Continuous spacing for at least 12
milliseconds
None
Acknowledge Active
a!
a<CR><LF>
Send Identification
aI!
allccccccccmmmmmmvvvxxx...xx<CR>
<LF>
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Operation
Name
Command
Response
(Refer Note 1.)
Change Address from a to b
aAb!
b<CR><LF>
Address Query
?!
a<CR><LF>
Start Measurement
aM! or aMC!
atttn<CR><LF>
Send Data
aD0!
a<value><CR><LF> or
a<value><CRC><CR><LF>
Start Verification
aV!
atttn<CR><LF>
(Refer Note 2)
Start Concurrent Measurement
aC! or aCC!
atttnn<CR><LF>
Continuous Measurements
aR0! or aRC0!
a<value><CR><LF>
a<value><CRC><CR><LF>
(same as the D commands)
SEE SAMPLE SDI-12 COMMS SESSION
Note 1.
SPECIAL SDI-12 X COMMANDS
aXn! Return data associated with command 'n'. Quadrature Shaft Encoder will reply with a0001<CR><LF> The aDO!
command must be issued to get the actual data.
aXn+xxxx! Set parameter for command 'n'. Quadrature Shaft Encoder will reply with a0001<CR><LF> The aDO! command
must be issued to get the actual data.
Set/Get Current Value
aX0!
Get the river level.

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Operation
aX0+0012.345!
Set the river level to +12.345 m.
(Note: AD100A only uses 2 decimal places)
Set/Get 4mA Level
aX2!
Get the water level when 4mA will be output on 4-20mA
loop
aX2+0005.0!
Set the 4mA Level to 5.0m (Acceptable values are 0000.0
to 9999.9)
(Value should be less than the 20mA Level)
Set/Get 20mA Level
aX3!
Get the water level when 20mA will be output on the 4-
20mA loop
aX3+0025.0!
Set the 20mA level to 25.0m (Acceptable values are
0000.0 to 9999.9)
(Value should be greater than the 4mA Level)
Set/Get ID Number
aX4!
Get the Shaft Encoder ID.
aX4+12345!
Set the Shaft Encoder ID. Acceptable values 0-65535. This
value appears in the Identify command.
Set/Get Quadrature Direction
aX8!
Get the Quadrature Direction.
aX8+0!
Set the Quadrature Direction (0=>Normal : 1=>Reversed)
Set/Get Lithium Battery Backup Mode (S/W Rev 5-3 and higher)
aX16!
Get the Lithium backup mode (0=NO (off) : 1=YES (on)).
aX16+0!
Set the Lithium Battery Backup mode to NO
aX16+1!
Set the Lithium Battery Backup mode to YES
(When set to YES and no external 12V is present – the
internal lithium battery will continue to power the sensor
to measure water level. The lithium battery can only
power the sensor for 1 to 2 months !)

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Operation
Set/Get Battery Voltages Measure Feature (S/W Rev 5-3 and higher)
aX17!
Get the BattV measure feature state (0=off : 1=on).
aX17+0!
Set the BattV measure feature to OFF (default from
factory)
(Result of aM! is a0001<CR><LF>
and aD0! is a+0001.234<CR><LF>
where +0001.234 is the water level)
aX17+1!
Set the BattV measure feature to ON
(Result of aM! is a0003<CR><LF>
and aD0! is a+0001.234+3.6+12.8<CR><LF>
where +0001.234 is the water level
+3.6 is the internal lithium battery and
+12.8 is the external battery voltage)
Increment the 4mA Calibration
aX96+00!
Examine the present 4mA Calibration without altering it.
(This also saves the calibration)
aX96+05!
Increment the 4mA Calibration by 5 steps
(This should be done while accurately measuring the current on the 4-20mA loop)
(If the calibration is changed, always finish by sending aX96+00! to save it)
Increment the 20mA Calibration
aX97+00!
Examine the present 20mA Calibration without altering it.
(This also saves the calibration)
aX97+03!
Increment the 20mA Calibration by 3 step
(This should be done while accurately measuring the current on the 4-20mA loop)
(If the calibration is changed, always finish by sending aX97+00! to save it)

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Maintenance
5Maintenance
The AD375MA (as well as AD37.5MA, AD150MA and AD100MA) Shaft Encoders require no maintenance, however all
connected mechanical equipment should be periodically checked for cleanliness and ease of operation.
Internal 3.6V Lithium AA batteries should be replaced every 2 years.
Internal Batteries Replacement Instruction:
§ Loosen the 4 screws on the enclosure lid
§ Remove the lid
§ Cut restraining strap
§ Remove and replace batteries one at a time (ensuring polarity is correct) to ensure processor is not interrupted (use a
3.6v Lithium battery -AA package)
§ Fit a new restraining strap (150mm cable tie)
§ Replace enclosure lid ensuring a proper fit
§ Tighten the 4 screws