Jupiter
SUBSEA CONTROL SYSTEMS
TM
Tel: +44 (0) 1653 602020
Fax: +44 (0) 1653 691712
Email: sales@zetechtics.com
Website: www.zetechtics.com
Zetechtics Ltd, Malton YO17 6TA England
SUBSEA DISPLAY SYSTEM MANUAL
INSTALLATION, OPERATION & MAINTENANCE
All information, documents, data and software supplied by us to you or you to us is confidential and supplied in
confidence whether or not a contract comes into existence between us.
Zetechtics standard Confidentiality Agreement applies.
Jupiter is a Trademark of Zetechtics Ltd.
Jupiter SUBSEA DISPLAY SYSTEM - QUICK START GUIDE Jupiter
Jupiter Subsea Display System Manual Quick Start Guide 023-14-52-010 Issue 3
Page 1 of 2 PDF Date 13 June 2018
Specification
Operational Environment:
Fresh water or seawater to a depth of 3000m
-10 to +50°C Operational.
-20 to +65°C Storage
Electrical:
2 Connectors
Connector 1 – (5 way) – Power and data (RS232)
Connector 2 – (8 way) – Sensors
Material:
Main Housing – 316 stainless steel pressure housing
with removable end cap
Display – Acetal or 316 stainless steel, solid potted
Size:
2 Digit:- Ø50 x 199.5mm
4 Digit:- Ø50 x 230mm, Display 80 x 40mm
Dual 4 Digit:- Ø50 x 230mm Display 80 x 72mm
Weight:
2 Digit:-1.4kg (in air), 1.0kg (in water)4
4 Digit:-1.5kg (in air), 1.1kg (in water)
Dual 4 Digit:-1.6 kg (in air), 1.2kg (in water)
Display Type and Range:
Blue 7 segment LEDs – digits 14.2mm High
2 digit: -99 to 99 up to 1 decimal place
4 digit: -9999 to +9999 up to 3 decimal places
Leading zero suppression except immediately before
decimal point
Strain Gauge Transducer
Interface:
Suitable for 4 wire bridge
transducers such as pressure,
torque, load cell or other strain
gauge applications
Strain Gauge
Measurement Accuracy:
Offset Variation:
Transducer Sensitivity
Range:
Bridge Resistance:
System Calibration
Frequency:
± 1.0% of full scale
(From 10% to 100% of
full scale)
± 1.0% of full scale
2, 5 or 10 mV/V
>100 ohms
Minimum bi-annually
recommended
Counter Sensor Interface:
Suitable for reed switch
contact closures and 2 or 3
wire proximity sensors,
including NAMUR type
Counter Sensor Supply
up to 10mA:
Maximum Input
frequency on each
input:
Minimum dwell time
in any input state:
+5V Nominal or
+10V Nominal
2kHz
250µ seconds
Power Supply:
Battery – 1 D Cell Normally NiMH Rechargable
Capacity >7000mAH. May be fitted with Primary
cell – Duracell or equivalent for higher Capacity and /
or longer shelf / standby life.
Power Supply/Battery Life:
5 Days Average with continuous display, 5 Months
Standby.
Mounting the System
The system should be attached to a secure and stable structure with good visibility of the
display. Securing cylindrical body with a Jubilee® clip is an effective method.
The 4 Digit Subsea Display (not dual), may also be mounted within a Remote Actuator
Assembly, that provides a facility for switching the zero display, scaling and units functions.
Zetechtics Part No: 023-14-16-002.
Electrical Connections
Conn 1 – Subconn MCBH5F – Power & Data, use RS232 Interface Cable or Power
Enable Connector.
Pin
Signal 1 RS232 Tx.
2
RS232 Rx.
3
0V / Battery.
4
0V / Circuitry.
5
Battery +ve / fused at 1A.
Note: A) Power Enable Connector links pins 3 and 4 to enable system.
B) Charger Connects to pins 3 and 5.
Conn 2 – Subconn MCBH8F – Sensors / Transducers, see Sensor Connection diagram:
023-14-52-011 in Hardware Options section of this manual.
Pin
Signal
1
+ve Excitation (to Strain Gauge)
2
-ve Excitation (to Strain Gauge), (Also digital sensor 0V if required)
3
+ve Sense (to Strain Gauge)
4
-ve Sense (to Strain Gauge)
5
Sensor 1 Supply +5V or +10V
6
Sensor 1 Input
7
Sensor 2 Supply +5V or +10V
8
Sensor 2 Input
Replacing Fuses
Both fuses are to be found on the Rear Interface PCB (nearest the connectors).
Fuse
Nanofuse Type
Farnell Part No.
Function
F1
3A Quick Blow
992-2180
Battery +ve Line
F2
3A Quick Blow
992-2180
Battery –ve Line
NOTE: Earlier systems were fitted with 1A fuses. These may be replaced with 3A fuses to
permit the use of international charger unit, Zetechtics part number: 023-14-02-005.
Jupiter SUBSEA DISPLAY SYSTEM - QUICK START GUIDE Jupiter
Jupiter Subsea Display System Manual Quick Start Guide 023-14-52-010 Issue 3
Page 2 of 2 PDF Date 13 June 2018
RS232 Serial Interface / Command Console Interface
The Subsea Display has an RS232 serial interface to allow configuration of various aspects of
the system functionality using the “Command Console Interface”. The system options
defined elsewhere within the system manual may be configured as required via the
Command Console Interface using a PC with an RS232 port and a communications program
such as “Windows Hyper Terminal”.
Normally the Jupiter Subsea Dis play system outputs the display reading over the RS232
serial interface whilst it is active.
The operational mode must be set for the system application, – see “System Modes”.
The system scale factors must be set to give the correct display for a given input, – see
“Calibration”.
Note: A Serial Interface Cable to connect to a standard PC 9 pin RS232 connector is supplied
with the Subsea Display System (Part No. 023-14-11-020). Connection to a USB port is
possible via a suitable USB to RS232 convertor. Contact Zetechtics, for further information.
RS232 Communication Parameters
Default
Data
Start
Stop
Parity
Handshaking
19200 8 1 1 None
None
Note: Available baud rates 2400 to 115200 (see RS232 Console User Commands).
Option Links – (It is only necessary to open the system to configure
display brightness or strain gauge sensitivity!!!)
Links on Front Interface PCB 023-14-14-003 / 023-14-19-003 (nearest PCB to
display).
LK
Option
Function
A Light Sensor.
Swap Light Sensor Enabled / Disabled
State
B Tare (Zero) switch.
Swap Zero Switch Enabled / Disabled
State
C
Scale switch, (no effect for strain gauge).
Swap Scale Switch
D
Not fitted to 2 Digit Quadrature Counter.
See Separate Table (below).
Display Brightness 1.
E
Display Brightness 2
Factory default link setting is A, B, C & E fitted / enabled.
Display Brightness / Typical Battery Life All Digits Continuously Illuminated
With Average Number of segments lit
Link D Link
E
Brightness 4 digit / Days
Dual 4 digit /
Days
Off
Off
Low 9 4.5
On
Off
Medium Low
6 3 Off
On
Medium High (Default)
4 2 On
On
High 3 1.5
Strain Gauge Input Gain Setting – Links
The system has three gain settings, which should be selected based on the maximum
output (sensitivity) from the transducer.
Links on Strain gauge Interface PCB023-14-07-003 (2nd from Cylindrical
Housing End Cap)
Links
Transducer Sensitivity (mV/V)
A (Default)
2
B
5
C
10
System Power Up / Operation
Ensure that the display face is exposed to daylight or artificial light.
Activate the Jupiter Subsea Display by fitting the RS232 Interface Cable or 5 way Power
Enable connector to Conn 1.
The Power – up Information Sequence is displayed.
The normal system display is shown with the display reset to zero.
The Subsea Display System is doing this, what does it mean?
Description
Cause
The display is illuminated
constantly
The light sensor is disabled. (Software or
Link A)
The display is only illuminated when
light is shone on the unit
The light sensor is enabled. (Software or
Link A)
The display is not illuminated at all
No connector in CONN 1
OR
There is insufficient light shining on the
unit and the light sensor is enabled
OR
The battery is completely flat
OR
A fuse has blown
The display shows ErHi
(Strain Gauge input)
The input value is above that set as
maximum or there is a sensor cabling /
connector fault.
The display shows ErLo
(Strain Gauge input)
The input value is below that set as
minimum or there is a sensor cabling /
connector fault.
The display is on continually except
for a brief flicker every six seconds
The light sensor is enabled (the unit
turns off the display briefly to test the
ambient light level).
The display is on continually except
for two brief periods every six
seconds
Low Battery
Jupiter Subsea Display System Manual 023-14-52-010 Issue 3
PDF Date 13 June 2018
ISSUE INFORMATION
Issue Changes Date
1 Original Issue 25 Jan 2011
2
Calibration example correction. Technical support details updated
28 March 2011
3 Correction to Battery Life 17 October 2014
4 Updating for new Control Comands 13 June 2018
WARNING & DISCLAIMER
All rights reserved. This manual and the programs referred to herein are copyrighted works of
Zetechtics Ltd, York, England. Reproduction in whole or in part, including utilisation in
machines capable of reproduction or retrieval, without the express written permission of the
copyright holders is prohibited. Reverse engineering is also prohibited. The user is allowed to
make copies of the whole or part of this document solely for the purpose of the operation of
Jupiter Tool Control Systems by the intended customer and his servants.
Jupiter is a registered trademark of Zetechtics Ltd.
The Jupiter System is highly complex and should only be operated & maintained by suitable
qualified & experienced personnel. In particular it is recommended that personnel undergo
training by Zetechtics on all aspects of this system. Failure to do so may jeopardise warranty and
other service agreements.
As part of our continuous improvement program Zetechtics reserves the right to change any of
the specifications contained within this document without prior notice. The information provided
is believed to be reliable however Zetechtics assumes no responsibility for inaccuracies &
omissions.
TRADEMARKS & ACKNOWLEDGEMENTS
Windows is a registered trademark of Microsoft Corporation, LabVIEW is a registered trademark
of National Instruments Corporation, Paintshop Pro is a registered trademark of JASC
Corporation, Adobe Acrobat is a registered trademark of Adobe Systems Inc..
Zetechtics Ltd. cannot attest to the accuracy of this information. Use of a term in this manual
should not be regarded as affecting the validity of any trademark or service name. Companies,
names and/or data used in screens or sample printouts are fictitious unless otherwise noted.
TABLE OF CONTENTS
INTRODUCTION ....................................................................................... 1
BRIEF DESCRIPTION ..................................................................................................................... 1
EQUIPMENT SUPPLIED .................................................................................................................. 1
MOUNTING THE SYSTEM ................................................................................................................ 2
GETTING STARTED .................................................................................. 3
CONNECTIONS ............................................................................................................................. 3
SYSTEM CONFIGURATION .............................................................................................................. 3
RS232 Serial Interface / “Command Console Interface” ............................................................... 3
SYSTEM POWER UP / OPERATION .................................................................................................... 3
LOW BATTERY INDICATION ............................................................................................................ 4
POWER UP INFORMATION SEQUENCE ............................................................................................... 4
Factory Default Conditions ............................................................................................................. 4
DISPLAY OPERATION .................................................................................................................... 4
Light Sensing ................................................................................................................................... 4
Operational Option Links A, B, C, D & E ...................................................................................... 5
2 AND 4 DIGIT QUADRATURE COUNTER OPERATIONAL MODES ....................... 6
QUADRATURE OR SINGLE INPUT ..................................................................................................... 6
WHAT IS QUADRATURE? ................................................................................................................ 6
UNIPOLAR ................................................................................................................................... 6
BIPOLAR ..................................................................................................................................... 6
UN-SCALED DISPLAY .................................................................................................................... 7
SCALED DISPLAY ......................................................................................................................... 7
STANDARD MODES ....................................................................................................................... 8
Counting Modes ............................................................................................................................... 8
Single Input Continuous Display ................................................................................................... 8
Dual Input Quadrature Continuous Display ................................................................................. 8
Dual Input Quadrature Bipolar Continuous Display ................................................................... 8
Dual Input Quadrature Bipolar Overflow Display ....................................................................... 8
QUADRATURE INPUT DECODING ...................................................................................................... 9
CALIBRATION PROCEDURE ........................................................................................................... 10
Methods .......................................................................................................................................... 10
Method 1 – Calculating calibration scale factors ........................................................................ 11
Method 2 – Determining calibration scale factors by experiment ............................................. 13
Calibration Check Procedure ........................................................................................................ 15
Scaling Options .............................................................................................................................. 16
Count Scaling ................................................................................................................................. 16
Numerator ...................................................................................................................................... 16
Denominator .................................................................................................................................. 16
DISPLAY MODES ......................................................................................................................... 17
Normal Counter Display with Input Activity .............................................................................. 17
Zero Display modes ....................................................................................................................... 17
Normal Counter Display showing Absolute Zero ........................................................................ 18
One example of the utilization of absolute zero .......................................................................... 18
4 Digit Counter Display with Overflowed Indication ................................................................. 18
4 Digit Counter Bipolar Overflow Display ................................................................................... 19
Rounding Options .......................................................................................................................... 19
Rounding Mode .............................................................................................................................. 19
Truncated Mode ............................................................................................................................. 19
Examples of the display with various options ............................................................................. 21
2
DISPLAY CONTROLS ................................................................................................................... 22
Zero Display Reed Switches (4 Digit Display only) ..................................................................... 22
Scale Swap Reed Switch (4 Digit Display only) .......................................................................... 22
4 DIGIT STRAIN GAUGE INPUT OPERATIONAL MODES ................................. 23
GAIN SETTINGS ......................................................................................................................... 23
CALIBRATION ............................................................................................................................ 23
Dead Band Trim Function ............................................................................................................ 24
DISPLAY CONTROLS ................................................................................................................... 25
Zero Display Reed Switches .......................................................................................................... 25
Units (Nm / Ib.ft) Reed Switches (Torque display modes only) .................................................. 25
DUAL 4 DIGIT DISPLAY OPERATIONAL MODES ........................................... 26
DESCRIPTION ............................................................................................................................ 26
DUAL 4 DIGIT DISPLAY CONTROLS ................................................................................................ 26
THE SUBSEA DISPLAY SYSTEM IS DOING THIS, WHAT DOES IT MEAN? .................................................. 26
COMMAND CONSOLE INTERFACE ............................................................. 27
RS232 Console Display ................................................................................................................. 27
Console Operation Procedure ....................................................................................................... 27
RS232 DATA OUTPUT ................................................................................................................ 28
RS232 Serial Data Format ............................................................................................................ 28
DUAL DISPLAY RS232 SERIAL DATA FORMAT ................................................................................ 28
RS232 CONSOLE USER COMMANDS ............................................................................................. 29
Command Summary – General Use ............................................................................................. 29
Command Summary – Quadrature Counter ............................................................................... 30
Command Summary – Strain Gauge Input ................................................................................. 32
Command Summary – System Availability ................................................................................ 32
Note: ............................................................................................................................................... 32
Command Description ................................................................................................................... 33
POWER ................................................................................................ 39
BATTERY .................................................................................................................................. 39
SYSTEM CHARGING .................................................................................................................... 39
New type International 100 to 240VAC charger: 023-14-02-005 ............................................... 39
Older type UK 230VAC charger: 023-14-02-001 ......................................................................... 39
Checking the System Operation ................................................................................................... 39
Remote - Display Zero Control ..................................................................................................... 39
MAINTENANCE ..................................................................................... 40
OPENING THE SUBSEA DISPLAY .................................................................................................... 40
REPLACING FUSES ..................................................................................................................... 40
REPLACING THE BATTERY ........................................................................................................... 41
REASSEMBLING / SEALING THE SUBSEA DISPLAY ............................................................................. 41
MAINTENANCE/STORAGE .............................................................................................................. 42
Subconn® Connectors ................................................................................................................... 42
O-Rings ........................................................................................................................................... 42
HARDWARE OPTIONS ............................................................................. 43
SYSTEM OPTIONS....................................................................................................................... 43
Sensor Connection ......................................................................................................................... 43
3
SYSTEM SPECIFICATION ........................................................................ 44
ZETECHTICS CONTACT INFORMATION ...................................................... 45
TECHNICAL SUPPORT.................................................................................................................. 45
AGENTS .................................................................................................................................... 45
1
INTRODUCTION
BRIEF DESCRIPTION
All Jupiter Subsea Display Systems are rated to 3,000m depth in sea water, and can be
interfaced to a Jupiter Subsea Control System or data-link. They are stand-alone, battery
powered, ultra low power consumption with selectable dormant state. Designed for Strain
Gauge input and/or Digital Sensor input and display either individually or simultaneously.
The Jupiter Strain Gauge Subsea Display System is a simple means of measuring a strain
based variable (such as pressure, torque, etc.) when an electronic control system is not fitted.
The Subsea Strain Gauge Display System can be calibrated to display any variable with a
scale and offset applied to ensure that the user sees a real world value directly related to the
measurement in question.
The Jupiter Subsea Quadrature Counter System is a means of monitoring how a
Quadrature Sensor, changes state, when an electronic control system is not fitted. Sensor
types, including contact closure such as a Reed Switch and Inductive Proximity (including
NAMUR) types are supported.
For example if a rotating tool, is fitted with a Quadrature Sensor, which has a known number
of changes of state per revolution, then the 2 or 4 digit display will show the number of full
revolutions, together with an indication of whether a partial revolution has occurred.
2 Digit Display: Can be used as a 2 digit counter only.
4 Digit Display: Can be used as either a 4 digit counter display or a 4 digit strain gauge
input display. An externally applied magnet can quickly and easily zero the display as well as
changing the unit between scaled and un-scaled modes or units, ie. Nm / lb.ft.
Dual 4 Digit Display: Can display count and strain gauge input simultaneously. An
externally applied magnet can quickly and easily zero the display as well as changing the unit
between scaled and un-scaled modes or units, ie. Nm/lb.ft.
Both 2 and 4 Digit Counters have a user set 5V or 10V power supply provided for the input
sensor(s).
All Jupiter Subsea Display Systems have a visible low battery indication and power saving
options, which can user configured.
E
QUIPMENT SUPPLIED
The standard Subsea Display System is supplied with the following components:
1 x Subsea display system
1 x Battery Charger
1 x Power enable connector
1 x RS232 interface cable
1 x Manual
1 x Test Certificate
System Types
Part Number
Description
023-14-52-121
2 Digit Jupiter Subsea Display (Counter Only)
023-14-52-122
2 Digit Jupiter Subsea Display – NAMUR
(Counter Only)
023-14-52-131
4 Digit Jupiter Subsea Display
023-14-52-132
4 Digit Jupiter Subsea Display – NAMUR
023-14-52-141
Dual 4 Digit Jupiter Subsea Display
[TorqueNm/Ft.lb & Turns]
023-14-52-142
Dual 4 Digit Jupiter Subsea Display – NAMUR
[TorqueNm/Ft.lb & Turns]
023-14-52-151
2x4 Digit Jupiter Subsea Display System [Flow
Rate & Volume]
023-14-52-161
2x4 Digit Jupiter Subsea Display System [Flow
Rate USG/Min & Pressure/bar]
Note: The 2 Digit Jupiter Subsea Display can function as a counter only.
2
M
OUNTING THE SYSTEM
The system should be attached to a secure and stable structure so that there is good visibility
of the output display. The means of mounting will be dependent on the specific application,
however using a worm drive hose clip (such as a Jubilee® clip) to secure the cylindrical body of
the system to channel section proves an effective method.
The 4 Digit Subsea Display (not dual) may also be mounted within a Remote Actuator
Assembly, Part No: 023-14-16-002, that provides a facility for switching the zero display,
scaling and units functions. If this is the case the system will be mounted directly to the
Remote Actuator as detailed in the General Assembly Drawing, Doc. No: 023-14-16-001, which
in turn should be mounted using the 2 off mounting holes on the front flange. The position and
size of these mounting holes are detailed in the General Assembly Drawing. Consideration
should be made to the mounting position to allow the actuator levers to be operated.
If a Remote Actuator Assembly is required for a Dual 4 Digit Subsea Display, then please
contact Zetechtics.
Note: Adapter holes are provided on the Remote Actuator to allow for mounting of adapter
levers (not supplied by Zetechtics).
If the front glass of the 2 digit display is scratched or otherwise damaged, the Unit should be
returned to Zetechtics for replacement/pressure testing.
3
GETTING STARTED
CONNECTIONS
Conn 1 – Power & Data, use RS232 Interface Cable or
Power Enable Connector supplied.
Conn 2 – Sensors / Transducers, see Sensor
Connection diagram: 023-14-52-011 in Hardware
Options section of this manual.
Pin
Signal
Pin
Signal
1
RS232 Tx.
1 +ve Excitation (to Strain Gauge)
2 RS232 Rx.
2 -ve Excitation (to Strain Gauge), (Also
digital sensor 0V if required)
3
0V / Battery.
3 +ve Sense (to Strain Gauge)
4
0V / Circuitry.
4 -ve Sense (to Strain Gauge)
5
Battery +ve / fused at 1A.
5 Sensor 1 Supply +5V or +10V
Note: A) Power Enable Connector links pins 3 and 4
to enable system.
B) Charger Connects to pins 3 and 5.
6 Sensor 1 Input
7 Sensor 2 Supply +5V or +10V
8 Sensor 2 Input
Note: Older type systems (023-14-40-XXX) provided +5V on pin 1 of CONN 2. These systems
do not. Contact Zetechtics for compatibility information.
S
YSTEM CONFIGURATION
There is no need to open the subsea display unit to configure any system
options, except adjusting the display brightness for the single / dual 4
digit display unit, or the strain gauge sensitivity!!!
RS232 Serial Interface / “Command Console Interface”
The Subsea Display has an RS232 serial interface to allow configuration of various aspects of the
system functionality using the Command Console Interface, and to provide an output of the
Subsea Display Reading to third party equipment, such as a data multiplexer, or data logger.
The system options defined elsewhere within this manual may be configured as required via the
Command Console Interface using a PC with an RS232 port and a communications program such
as “Windows Hyper Terminal”.
Normally the Jupiter Subsea Display system outputs the display reading whilst it is active.
The operational mode must be set for the system application, – see “System Modes”.
The system must be scaled to give the correct display for a given input, – see “Calibration”.
Note: A Serial Interface Cable to connect to a standard PC 9 pin RS232 connector is supplied
with the Subsea Display System (Part No. 023-14-11-020). Connection to a USB port is possible
via a suitable USB to RS232 converter, contact Zetechtics for further information.
See the Command Console Interface section for full details of how to use the Command Console.
S
YSTEM POWER UP / OPERATION
The battery should be charged according to the instructions, see the “Power” section of this
manual.
The unit should be connected to the sensor(s) via Conn 2, as shown in the table above.
Ensure that the display face is exposed to daylight or artificial light.
Activate the Jupiter Subsea Display by fitting the RS232 Interface Cable or 5 way Power Enable
connector to Conn 1.
The Power – up Information Sequence is displayed.
The normal system display is shown with the display reset to zero.
4
LOW BATTERY INDICATION
The battery potential is internally monitored and if it falls below 1.1 Volts, the display will
indicate a low battery by switching off twice, briefly, every 6 seconds. This battery low state will
not be cleared until the battery voltage is raised above 1.2 Volts by recharging or replacement.
P
OWER UP INFORMATION SEQUENCE
Ensure that the display face is exposed to daylight or artificial light.
Activate the Jupiter Subsea Display by fitting the RS232 Interface Cable or 5 way Power Enable
connector supplied to Conn 1.
On power up the display will:-
Power Up Information Sequence
Description 2 Digit Display Shows
4 Digit Display Shows
1
Lamp test: All the segments of the display are illuminated
to assure the user that the display is fully operational and
therefore any information shown cannot be misinterpreted by
misrepresentation of the characters due to a faulty segment.
2
Display serial number: The serial number of the unit is a
simple 8-digit index with no decimal places, and is displayed
with the prefixes ‘J.’ and ‘I.’ as shown.
eg. J.2845 and I.1234, = 28451234
No Equivalent
Followed by:-
3
Display software version: The version of the software the
unit is programmed with, is a simple 4-digit index with no
decimal places, and is displayed with the prefix ‘V.’ as shown.
No Equivalent
4
Display battery voltage: Full – 1.4V, ½ - 1.2V, Low – 1.0V.
The present potential on the battery is displayed in Volts
with 3 decimal places, and is displayed with the prefix ‘b.’ as
shown.
No Equivalent
5
Display RS232 baud rate: The present setting of the baud
rate is shown together with the prefix ‘R.’ as shown.
No Equivalent
6
Display Function:
Normal Display: After the power sequence, the display is
shown. Note that the display has been reset to zero, however
the system configuration is exactly as previously configured.
To deactivate the system remove the RS232 Interface Cable or Power Enable connector from
Conn 1.
Factory Default Conditions
All parameters and options as described in the Command Summary, (see RS232 Console User
Commands), will be in the state as if the command ‘reset’ has been executed.
The Baud rate will be set to 19200 bits per second.
D
ISPLAY OPERATION
Light Sensing
In order to conserve battery charge and therefore maximize operational time before a recharge is
required, the system has a light sensor which if enabled is used to detect the presence of light. If
there is little or no ambient illumination the system enters a very low power mode where the
display is switched off. However, the unit will still register any changes on the counter inputs at
full specified speed.
The time lapse between loss of illumination and the display switching off, can be set by the user
at the command Console interface, with the ‘dwelltime’ command. Type ‘dwelltime 0500’, for
example, this will give a time lapse of 500 seconds between loss of illumination and the display
switching off. The value is always entered as a 4 figure number in seconds. The maximum value
that can be entered is 1000.
5
Operational Option Links A, B, C, D & E
Important: The functions set by links A, B and C can all be configured via a PC communications
link (RS232) using the Command Console Interface. It is strongly advised that this method is
used rather than physically changing links as damage may occur during disassembly and
subsequent reassembly.
Inside the cylindrical pressure housing there are 3 (on the 2 digit counter) or 5 (on the 4 digit
counter) links on the front interface PCB nearest to the display (which can be seen through the
window of the 2 digit counter).
These links allow the user to change the operation of the display controls (A, B, C) if it is not
possible to connect the system to a PC RS232 port, and to adjust the display brightness of the 4
digit or dual 4 digit counter (D, E).
Note: The link positions can be overridden through the console interface, and vice versa. i.e.
fitting or removing links A, B or C will swap the current enabled or disabled state of the control,
to the alternate state.
Factory default link setting is A, B, C & E fitted.
Display Brightness / Typical Battery Life All Digits Continuously Illuminated With
Average Number of segments lit
Link D
Link E
Brightness
4 digit / Days
Dual 4 digit / Days
Off
Off
Low
9
4.5
On
Off
Medium Low
6 3 Off
On
Medium High (Default)
4 2 On
On
High
3
1.5
Note: At lower brightness level settings, inconsistencies in display segment brightness may
become apparent due to tolerances in their design and manufacture. If your application requires
the increased battery life offered by lower display brightness, please contact Zetechtics for a
specially selected display assembly to your requirements.
To change the links:
Open the Subsea Display System by removing the end cap from the cylindrical housing and
sliding out the internal support tube (see Opening the Subsea Display).
The links are located on the Front Interface PCB (nearest the display) and can be fitted or
removed using fine nose pliers.
Re-assemble the Subsea Display System (see Reassembling / Sealing the Subsea Display).
Links on Front Interface PCB 023-14-14-003 / 023-14-19-003 (nearest PCB to display).
Option Function
A
Light Sensor
Swap Light Sensor Enabled / Disabled State
B
Zero switch
Swap Zero Switch Enabled / Disabled State
C
Scale switch (Counter or Torque modes
only)
Swap Scale Switch Enabled / Disabled State
D
Not fitted to 2 Digit Quadrature Counter.
See Separate Table (below).
Display Brightness 1.
E
Display Brightness 2
6
2 AND 4 DIGIT QUADRATURE COUNTER OPERATIONAL MODES
The modes of operation describe the behaviour of the display when the count is below zero or
above the maximum number the 2 or 4 digit display is able to convey i.e. 99 and 9999
respectively. Counts below zero are only applicable to a system using Quadrature inputs which
has the ability to turn in both directions, however the behaviour of the counter after the full scale
of the display has been exceeded will still be important.
Q
UADRATURE OR SINGLE INPUT
It is possible to use both sensor inputs if a quadrature input is required. Alternatively either one
of the inputs may be used if a quadrature input is not required.
W
HAT IS QUADRATURE?
A quadrature sensor input arrangement allows the system to monitor 2 inputs and determine the
direction of travel whenever a sensor changes state. This can relate to rotation or linear
movement depending on the mechanical system and sensor arrangement.
The sensors and sensor triggers are arranged such that after a sensor changes state, the other
sensor must change state next if movement continues in the same direction. If the direction of
movement changes and movement continues, the last sensor to change state will revert to its
state prior to the previous change of state next time it is triggered.
For a graphical representation of this see the section on Quadrature Input Decoding.
This can be achieved in a number of ways such as:
• A wheel or rail with a number of magnetic targets at regular intervals
• A wheel or rail with a number of teeth at regular intervals
• A helical / threaded drive shaft with a wheel as described above
It is very important to get the arrangement of sensors and targets correct. If a single sensor
changes state twice before the other sensor changes state, or is intermittent, then the count will
be unreliable.
Correctly implemented Quadrature schemes are inherently immune to noise / contact chatter.
U
NIPOLAR
In Unipolar mode the display is always positive as indicated by the sign indicator on the display.
As the count is decremented, one less count than zero be comes ‘+9999’ and ‘99’ on the 4 and 2
digit displays respectively. Similarly as the count is incremented one more count than the +9999
or 99 becomes +0 or 0.
B
IPOLAR
In Bipolar mode, the display with one count less than zero is –1, and with one more count than
+9999 is ‘o000’ which represents an overflowed zero equivalent to 10,000 which cannot be
displayed on a 4 digit display. More counts in the positive direction will yield –9999 on the
display followed by –9998, -9997 etc through –1, 0, +1, +2 and up to +9999 again. Decrementing
the count through zero from say +5 will yield +4, +3, +2, +1, 0, -1, -2, -3, -4 etc.
7
U
N-SCALED DISPLAY
It is possible to configure the display to display an un-scaled count (actual number of counts
before the scale factor is applied). It is possible to monitor both the scaled and un-scaled counts
simultaneously via the RS232 diagnostic display, and in the case of the 4 digit display it is
possible to swap the display between the scaled and un-scaled values with the display switches.
This enables the user to precisely monitor the detection of the change of state of each input.
The un-scaled count is reset to zero when the scaled count is reset to zero. The mode of operation
of the un-scaled count is the same as either the “Single Input Continuous” or “Dual Input
Quadrature Continuous” modes of counting, depending on whether a single input or quadrature
input mode is being used. That is, the unscaled count value is not signed.
The un-scaled count may rollover from 9999 to 0 (or 99 to 0 for the 2 digit counter), (or vice versa
in quadrature mode) before the scaled value, and may do so many times, depending on the scale
factor determined by the numerator and denominator. This means the user must keep track of
the number of rollovers if they wish to compare the scaled value to the un-scaled count. However,
the display of the un-scaled value always changes by 1 in the correct direction for each edge
transition (except when rolling over). Also, a given number of counts in either direction will
always display the same un-scaled value.
S
CALED DISPLAY
Scaled operation modes may be selected as either Rounded or Truncated. This determines how
the displayed value is determined after scaling.
The rounding mode, overflow mode and absolute zero mode configuration all affect the system’s
operation and display.
8
STANDARD MODES
Counting Modes
The following modes configure standard operational configurations which should suit most user’s
needs, but can each be modified once set by adjusting any individual option.
Single Input Continuous Display
Available with 2 or 4 digit display.
seti1c: This command sets the Counter to Input 1, Unipolar mode, continuous display, with
overflow indication disabled.
seti2c: This command sets the Counter to Input 2, Unipolar mode, continuous display, with
overflow indication disabled.
0 • 1 • 2 • 3 … 9997 • 9998 • 9999
Dual Input Quadrature Continuous Display
Available with 2 or 4 digit display.
Setiqc: This command sets the Counter to Quadrature using Inputs 1 and 2, Unipolar mode,
continuous display, with overflow indication disabled.
0 • +1 • +2 • +3 … +9997 • +9998 • +9999
Dual Input Quadrature Bipolar Continuous Display
Available with 2 or 4 digit display.
Setiqbc: This command sets the counter to Quadrature using Inputs 1 and 2, Bipolar mode,
continuous display, with overflow indication disabled.
-9999 • -9998 • -9997 …-2 • -1 • 0 • +1 • +2 … +9997 • +9998 • +9999
Dual Input Quadrature Bipolar Overflow Display
Available with 4 digit display only.
Setiqbo: This command sets the Counter to Quadrature using Inputs 1 and 2, Bipolar mode,
continuous display, with overflow indication enabled.
-9999 • -9998 • -9997 …-2 • -1 • 0 • +1 • +2 … +9997 • +9998 • +9999
In this mode once an overflow has occurred an indication is displayed until the counter is reset, or
the unit is powered off. The indication is displayed once a second at a duty cycle of 25%,
overlaying the sign indication, i.e.
“+”
25% 75%
or
“-“
25% 75%
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