HS AD375MA Instruction Manual

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 1

Issue 3 July, 2017

INSTRUCTION MANUAL

ABSOLUTE SHAFT ENCODER

MODEL AD375MA

HYQUEST SOLUTIONS PTY LTD

PO BOX 332, LIVERPOOL B.C NSW 1871, AUSTRALIA

Phone:(Int.) 612 9601 2022 Fax: :(Int.) 612 9602 6971

Phone:(Nat.) [phone] Fax: :(Nat.) [phone]

Email: [e-mail]

Web:

www.hyquestsolutions.com.au

QUALITY SYSTEM

ISO:9001

CERTIFIED

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 2

Issue 3 July, 2017

TABLE OF CONTENTS

1. Introduction........................................................................................ 3

2. Installation .......................................................................................... 4

3. Maintenance ....................................................................................... 12

4. LCD Screen ........................................................................................ 15

4.1 Configuring the AD375MA ................................................................................ 16

5. SDI-12 Compliant Commands ......................................................... 17

6. Specification ....................................................................................... 20

6.1 Hardware Specification ....................................................................................... 20

Appendix A Surge Protection ......................................................................... 21

Appendix B SDI-12 to RS232 Interfacing ...................................................... 22

Appendix C Changing Pulley Sizes ................................................................. 25

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 3

Issue 3 July, 2017

1. Introduction

The Hyquest Solutions Absolute Shaft Encoder model AD375MA is a low power,
microprocessor controlled shaft encoder designed for field operation to enable measurement
of water level. The internal CMOS circuitry enables the encoder to output measured levels in
absolute format as a 4-20mA and SDI-12 signal at the same time.

SDI-12 Output/
Power Input
(All models)

4-20mA Output

2 line x 16 character LCD
with backlighting
(All Models)

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 4

Issue 3 July, 2017

2. Installation

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.

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 5

Issue 3 July, 2017

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

pull

ey 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.

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.

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 6

Issue 3 July, 2017

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.

Ele

ctrical 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.)

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 7

Issue 3 July, 2017

HyQuest Solutions Pty. Ltd.

Model AD375MA
© Copyright Page 8

Issue 3 July, 2017

Shaft Encoder Typical Bore Hole Set Up Using Guide Pulleys