ETC Sasquatch User Manual
Sasquatch
User’s Manual
Revision 4
April 23, 2018
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Ta ble of Contents
1 Background ........................................................................................................................................... 1
2 Physical Connections ............................................................................................................................. 1
2.1 Power ............................................................................................................................................ 1
2.2 Output Signal ................................................................................................................................ 1
2.2.1 Dry Contact Input .................................................................................................................. 2
2.2.2 Voltage Input ......................................................................................................................... 2
2.3 Communications Port ................................................................................................................... 3
2.3.1 Communications Settings ..................................................................................................... 3
2.3.2 Modbus Slave ........................................................................................................................ 4
2.3.3 Program Mode ...................................................................................................................... 4
2.3.4 Wiring .................................................................................................................................... 4
3 Sensitivity .............................................................................................................................................. 6
3.1 Default Sensitivity ......................................................................................................................... 6
3.2 Adjusting the Default Sensitivities ................................................................................................ 7
4 Operating Modes .................................................................................................................................. 7
4.1 Normal .......................................................................................................................................... 7
4.2 Capture - Full Debug ..................................................................................................................... 7
4.3 Capture - Raw Samples ................................................................................................................. 7
5 Configurable Options ............................................................................................................................ 8
5.1 Output Switch Parameters ............................................................................................................ 8
5.1.1 Minimum Output Hold Time ................................................................................................. 8
5.1.2 Output Hold Scale ................................................................................................................. 8
5.2 Output Switch - Modes of Operation............................................................................................ 8
5.2.1 Static Time ............................................................................................................................. 8
5.2.2 Velocity Scaled ...................................................................................................................... 9
5.2.3 Plunger Hold .......................................................................................................................... 9
5.3 Detection Algorithm Timers ........................................................................................................ 10
5.3.1 Baseline Update Timer ........................................................................................................ 10
5.3.2 Arrival Detection Period ...................................................................................................... 10
5.3.3 Velocity Gathering Period ................................................................................................... 10
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5.3.4 Velocity Gathering Timeout ................................................................................................ 10
5.3.5 Velocity Calculation Timer .................................................................................................. 10
5.3.6 Departure Detection Period ................................................................................................ 10
5.3.7 Re-Initialize Timer ............................................................................................................... 10
5.4 Lubricator / Spring Wear Settings ............................................................................................... 10
5.4.1 Plunger Mass ....................................................................................................................... 10
5.4.2 Hard Arrival Velocity Threshold .......................................................................................... 10
5.4.3 Hard Arrival Kinetic Energy Threshold ................................................................................ 11
5.4.4 Dangerous Arrival Velocity Threshold ................................................................................. 11
5.4.5 Dangerous Arrival Kinetic Energy Threshold ....................................................................... 11
5.4.6 Consecutive Hard Arrival Alarm Threshold ......................................................................... 11
5.4.7 Cumulative Hard Arrival Threshold ..................................................................................... 11
5.4.8 Cumulative Kinetic Energy Threshold ................................................................................. 11
6 History ................................................................................................................................................. 11
6.1 Parameters .................................................................................................................................. 11
6.1.1 Date and Time ..................................................................................................................... 12
6.1.2 Units .................................................................................................................................... 12
6.2 Arrival Log ................................................................................................................................... 12
6.2.1 Arrival Time ......................................................................................................................... 12
6.2.2 Velocity................................................................................................................................ 12
6.2.3 Velocity Confidence Code ................................................................................................... 12
7 Lubricator / Spring Wear Monitoring ................................................................................................. 12
8 Hazardous Locations Certification ...................................................................................................... 14
9 Cathodic Protection ............................................................................................................................ 15
10 Company Contact Information ....................................................................................................... 15
Index of Tables
Table 1 - Dial Setting and Threshold Relationship ......................................................................................................... 6
Table 2 – Lubricator / Spring Wear Settings ................................................................................................................ 13
Table 3 – General Specifications (Normal Mode) ........................................................................................................ 16
Table 4 – Performance ................................................................................................................................................. 16
Table 5 – Environmental Data ..................................................................................................................................... 16
Table 6 - Double Word Register Format ...................................................................................................................... 17
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Table 7 - Elapsed Time Register Format ...................................................................................................................... 17
Table 8 - Date/Time Register Format .......................................................................................................................... 18
Table 9 - Available Coils ............................................................................................................................................... 19
Table 10 - Available Input Discretes............................................................................................................................. 20
Table 11 - Available Input Registers ............................................................................................................................ 21
Table 12 - Available Holding Registers ........................................................................................................................ 26
Ta ble of Figures
Figure 1 - Sasquatch Physical Connections .................................................................................................................... 1
Figure 2 - Typical Dry Contact Interface......................................................................................................................... 2
Figure 3 - External Resistor for Voltage Input ................................................................................................................ 2
Figure 4 – RS-485 Connection ........................................................................................................................................ 4
Figure 5 - Sensitivity Dial ................................................................................................................................................ 6
Figure 6 - Static Time Output Mode ............................................................................................................................... 8
Figure 7 - Velocity Scaled Output Mode ........................................................................................................................ 9
Figure 8 - Plunger Hold Output Mode ............................................................................................................................ 9
Figure 9 – Vision Sasquatch Kinetic Energy Settings .................................................................................................... 14
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Installation Location: Class I, Divisi on 2, Groups A, B, C, D or No n Haza rdous Locations Only
Applicable to all models
WARNING - DO NOT REMOVE, REPLACE OR DISCONNECT WHILE CIRCUIT IS LIVE UNLESS THE AREA IS KNOWN
TO BE FREE OF IGNITIBLE CONCENTRATIONS OF FLAMMABLE SUBSTANCES.
WARNING – EQUIPMENT SHALL BE CONNECTED TO AN APPROVED POWER SOURCE OR BARRIER THAT DOES
NOT PROVIDE MORE THAN 24VDC AND 8A.
WARNING - EXPLOSION HAZARD – SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I,
DIVISION 2.
WARNING - THIS EQUIPMENT IS SUITABLE FOR USE IN CLASS I, DIVISION 2, GROUPS A, B, C, D OR NONHAZARDOUS LOCATIONS ONLY.
WARNING - NO SERVICEABLE PARTS.
WARNING - IF EQUIPMENT IS USED IN A MANNER NOT SPECIFIED BY THE MANUFACTURER, THE PROTECTION
PROVIDED BY THE EQUIPMENT MAY BE IMPAIRED.
AVIS – NE PAS ENLEVER, REMPLACER OU COUPER SI LE CIRCUIT EST SOUS TENSION À MOINS QUE LA RÉGION
EST SAUF ET SANS SUBSTANCES INFLAMMABLES.
AVIS – L’ÉQUIPEMENT DOIT ÊTRE BRANCHER À UNE SOURCE D’ALIMENTATION APPROUVÉE OU UNE BARRIÈRE
QUI NE FOURNIRA PAS PLUS QUE 24VDC ET 8A.
AVIS – RISQUE D'EXPLOSION – LA SUBSTITUTION DE COMPOSANTS PEUT RENDRE CE MATERIEL
INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE I, DIVISION 2.
AVIS – L’ÉQUIPMENT EST ADAPTÉ POUR UTILISATION DANS CLASS I, DIVISION 2, GROUPS A, B, C, D OU DANS
DES RÉGIONS SAUFS.
AVIS – PAS DE COMPOSANTS SERVICEABLES.
AVIS – SI L’ÉQUIPEMENT N’EST PAS UTILISÉ TANT QU’AUX INSTRUCTIONS DU FABRICANT, LA PROTECTION PEUT
ÊTRE RÉDUITE.
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Installation Location: Class I , Division 1, Groups C, D or Class 1 Zone 0
Locations Only
Applicable to model ET-11000-1031-0000 ONLY
WARNING – INTRINSICALLY SAFE WHEN CONNECTED PER DRAWING ET-11000-1031-2001.
WARNING – EQUIPMENT SHALL BE CONNECTED TO AN APPROVED POWER SOURCE OR BARRIER THAT DOES
NOT PROVIDE MORE THAN 24VDC AND 8A.
WARNING – SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
WARNING – NO SERVICEABLE PARTS.
WARNING – AVOID STRIKING OR EXCESSIVE FRICTION ON THE EQUIPMENT SURFACE DUE TO IGNITION
HAZARD.
WARNING – TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES, DISCONNECT POWER
BEFORE OPENING.
AVIS – L’ÉQUIPEMENT EST EN SÉCURITÉ INTRINSÈQUE QUAND IL EST BRANCHÉ SELON LE DESSIN ET-110001031-2001.
AVIS – L’ÉQUIPEMENT DOIT ÊTRE BRANCHER À UNE SOURCE D’ALIMENTATION APPROUVÉE OU UNE
BARRIÈRE QUI NE FOURNIRA PAS PLUS QUE 24VDC ET 8A.
AVIS – LA SUBSTITUTION DE COMPOSANTS PEUT COMPROMETTRE LA SECURITE INTRINSEQUE.
AVIS – PAS DE COMPOSANTS SERVICEABLES.
AVIS – ÉVITER DE FRAPPER OU FRICTION EXCESSIVE SUR LA SURFACE DE L’ÉQUIPEMENT EN RAISON DE
RISQUES D'INFLAMMATION.
AVIS – POUR ÉVITER L’ALLUMAGE DES ATMOSPHÈRES INFLAMMABLES OU COMBUSTIBLES, COUPER LE
COURANT AVANT OUVERTURE.
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1 Background
The Sasquatch is a revolutionary new magnetic field sensor that can not only detect the movement of a
ferrous object, but calculate and store its velocity. It features a rugged aluminum case with support for
two hose clamps, a ½” NPT strain relief port, and captive screws in the lid. The adjustable sensitivity dial
allows the operator to reduce sensitivity to eliminate false detections in noisy environments or increase
sensitivity for hard to detect objects.
Sasquatch is the only velocity sensor on the market that features a communication mode where you can
upgrade the firmware, access more sensitivity settings, and see real time readings to troubleshoot hard
to detect situations. This microprocessor based design incorporates noise reducing filters and also
controls the output switch to give a clean, user configurable switch closure that is easy for any controller
to detect.
2 Physical Connections
The Sasquatch provides two connectors so that it can be powered, configured, and communicated with.
All cables should be labeled with the corresponding signal connection prior to inserting into terminals.
Ensure cables used meet the temperature and electrical ratings of the equipment. (See Table 2, 4)
Figure 1 - Sasquatch Physical Connections
2.1 Power
The Sasquatch requires a DC power source with a voltage of 5 V to 24 V. Power must be supplied while
waiting for an arrival and during any time the interface will be accessed as there is no internal battery.
• PWR – 5 V to 24 V DC
• COM – Ground
2.2 Output Signal
Each Sasquatch sensor is factory programmed to operate an internal switch when an arrival occurs. The
physical wiring and descriptions of the connections are shown below:
• SIG – Connect this to the input signal on your controller.
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• COM – The common (COM) is connected to ground. When an arrival occurs, current will flow
through the signal (SIG) connection to ground. There is 100 Ohms of impedance in this path to
limit the current.
This output can be used with controllers that support a dry contact or voltage input.
2.2.1 Dry Contact Input
The Sasquatch has been designed with an open collector field effect transistor (FET) so that it acts as a
dry contact, which ensures that it can be connected directly to most controllers. Most magnetic sensors
available on the market are designed to act as a dry contact, so the Sasquatch can easily be used as a
replacement sensor for any system. A dry contact input on a controller features an internal pull up
resistor. When the contact is open, the internal input will read the system voltage. When the contact
closes, the input will now read ground.
ETC Controller
100kΩ
5 V
PWR
SIG
COM
Sasquatch
PWR
SIG
COM
100Ω
To Input
Figure 2 - Typical Dry Contact Interface
2.2.2 Voltage Input
When using a programmable logic controller (PLC) or other application specific controller (i.e. Flow
Computer) it is possible that you need to connect to a voltage based input. This type of input is
expecting to see a change in the voltage and is not directly compatible with the Sasquatch because it
closes a switch instead of sending back a voltage. The difference is that there is no internal pull up
resistor provided by these controllers, so an external pull up resistor must be connected. Connecting a
100kΩ resistor between the power and input on the controller will allow these systems to connect to a
Sasquatch.
When the Sasquatch switch is open, the input will see the voltage coming from the power connection.
When the switch closes, the input will be pulled to ground. This difference in voltage can then be
detected.
Controller w/ Voltage Input
100kΩ
5 - 24 V
PWR
SIG
COM
Sasquatch
PWR
SIG
COM
100Ω
To Input
Figure 3 - External Resistor for Voltage Input
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2.3 Communications Port
The Sasquatch also provides a serial communications port. This is a standard 2 wire RS-485 differential
signal with a common (ground). It is used for accessing settings, reading the device status and history,
upgrading firmware, and configuring the operating mode.
• A/B – Two wire RS-485 Differential Signal
• COM – An additional ground connection to be used with an RS-485 connection.
2.3.1 Communications Settings
The settings for the communications port are fully configurable so that the Sasquatch can be used with
any other RS-485 compatible communication device. The following outlines the parameters that can be
configured.
2.3.1.1 Baud Rate
This is the data rate, represented in bits per second. The default is 9600 bps. The following are the
available rates:
• 1200 bps
• 2400 bps
• 4800 bps
• 9600 bps
• 19,200 bps
• 38,400 bps
• 56,000 bps
• 115,200 bps
• 128,000 bps
• 256,000 bps
2.3.1.2 Parity
The parity can be configured as no parity, even, or odd.
2.3.1.3 Data Bits
This is the number of data bits used to send one byte of data. It can be configured to 7 or 8, which is the
default.
2.3.1.4 Stop Bits
This is the number of bits that are appended at the end of the data to indicate the end of byte. The
default is 1 stop bit, but can be configured to 2.
2.3.1.5 Station Address
This is the Modbus slave station address. It is used to distinguish one Modbus slave from another and
must be unique on a given network. It can be configured between 1 and 247. The default is 1.
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2.3.1.6 Protocol
The default protocol is RTU, which transmits data in binary format. This is the most efficient protocol for
Modbus. It can also be set to ASCII, which sends the equivalent ASCII code for each digit, essentially
doubling the amount of data required.
2.3.2 Modbus Slave
The COM port supports the Modbus protocol. The Sasquatch acts as a Modbus slave device and only
responds to communication from the master. There is no special cable required and any other RS-485
compatible device can be connected directly to these connections. Please note that there may be a
requirement for an intrinsic safety barrier depending on the installation location and certification of the
master device.
RS-485 Modbus Master
B
A
COM
Sasquatch
B
A
COM
Figure 4 – RS-485 Connection
2.3.3 Program Mode
When the sensitivity dial is set to 0, Sasquatch enters a mode where it listens for external commands on
the RS-485 COM port. Using ETC Vision, you can program new firmware, change the operating mode,
and adjust the sensitivity levels.
2.3.4 Wiring
Most computers do not come with an RS-485 port, so a USB to RS-485 adapter must be used. The
connection is relatively straightforward.
2.3.4.1 Using the Raven USB to RS-485 Adapter
The Raven is the only adapter that has been certified for use in hazardous locations. When connecting to
the Sasquatch in hazardous locations, a Raven adapter should be used.
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Figure 5 - USB to RS-485 Adapter Wiring using the Raven
2.3.4.2 Using the Link
TM
Device Connection Adapter
Use the Sasquatch device cable that came with Link to connect to the device. Before connecting Link to
Sasquatch, ensure that the switch on Link is set to position 1 (the leftmost position).
Figure 6 - USB to RS-485 Adapter Wiring using the Link
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