Hawkeye Goshawk User Manual
GOSHAWK
LEVEL
TRANSMITTER
1.3.2 FILLING DIRECTION
GOSHAWK
2.3 TRANSMITTER - INTERNALS
[E] POWER TERMINAL
(ORANGE)
[F] ENCODING
POTENTIOMETER
TERMINAL (GREY)
[G] ENCODING
POTENTIOMETER
[H] PCB
[I] H-CLIP
REPLACED
BY [M] - [P]
IN GH II AND GH III
[J] OPERATOR SHAFT
[K] STANDOFFS
OPERATION AND
TROUBLESHOOTING GUIDE
Refer to www.hawk-eye.com for
latest manuals and information
READ AND UNDERSTAND THIS DOCUMENT BEFORE
INSTALLING AND USING THE GOSHAWK TRANSMITTER
REPLACES “GOSHAWK INSTALLATION INSTRUCTIONS, MAY 2010”
VALID FOR ALL GOSHAWK MODELS MANUFACTURED SINCE MID-2008.
1.0 INTRODUCTION
1.1 DESCRIPTION
The Goshawk Level Transmitter is a bolt-on, two-wire 24 VDC loop powered
transmitter that adds 4 – 20 mA electronic output to Hawkeye Industries Inc.’s Redtail
Hawk and Roadside Hawk gauge heads. The transmitter connects mechanically to the
gauge head cable reel, converting the rotational position of th e cable reel to a precise
current output.
Because Hawkeye’s Dry-Seal gauge heads use wound reels of cable as opposed to
pulleys, the rotational position of the reel provides accurate and repeatable float and
indicator position information. The solid-state nature of the transmitter electronics
allow the device to continue to track (but not transmit) float position information even
when unpowered. Powering the unit back up will provide instantaneous level position.
1.2 SAFETY CONSIDERATIONS
The Goshawk Transmitter carries CSA Hazardous Location Certification for Class I Div
1 Group C & D. Some parts of the transmitter may be classified as sparking
components, and as such the cover should only be removed from the device when in
a non-energized state, or in an non-hazardous location. Several procedures in this
manual require power to be disconnected from the transmitter before proceeding.
Failure to do so will provide erroneous calibration information, and may cause damage
to the transmitter, calibration equipment and / or process control equipment.
NOTE: INFORMATION REQUIR ED FOR SUCCESSFUL INSTALLATION
CAUTION OR IMPORTANT: INFORMATION IF NOT HEEDED MAY RESULT IN
DAMAGE TO THE EQUIPMEN T AND/OR INSTALLATION FAILURE
WARNING: INFORMATION THAT IF NOT FOLLOWED MAY RESULT IN INJURY OR
SHOCK.
1.3 ROTATIONAL ORIENTATIONS
1.3.1 EMPTYING DIRECTION
GOSHAWK
REDTAIL SYSTEM ROADSIDE SYSTEM
Indicator
moves
Float
moves
UPWARD DOWNWARD CLOCKWISE COUNTERCLOCKWISE
FIGURE 1 EMPTYING DIRECTION
Atmospheric
Reel rotates
Transmitter rotates
REDTAIL SYSTEM ROADSIDE SYSTEM
Indicator
moves
Float
moves
Atmospheric reel
rotates
DOWNWARD UPWARD COUNTERCLOCKWISE CLOCKWISE
FIGURE 2 FILLING DIRECTION
NOTE: ROTATION DIRECTIONS FOR THE GAUGE HEAD AND TRANSMITTER ARE
OPPOSITE TO ONE ANOTHER FOR THE SAME FILLING / EMPTYI NG DIRECTION IN
THE ORIENTATIONS ILLUSTRATED ABOVE. THIS IS DUE TO THE NATURAL
ORIENTATION OF EACH DEVICE THE READER WILL ENCOUNTER OVER THE
COURSE OF INSTALLING AND TROUBL ESHOOTING THE TRANSMITTER .
2.0 PART IDENTIFICATION
2.1 GAUGE HEADS
REDTAIL
GAUGE HEAD
ROADSIDE
ELECTRONIC COVER PLATE
FIGURE 3 GAUGE HEADS AND THEIR ELECTRONIC COVERS
CAUTION: THE ELECTRONIC CO VER PLATE CAN ONLY BE INSTALLED ON THE
ATMOSPHERIC SIDE OF THE GAUGE HEAD. INSTALLATION ON THE PRESSURE
SIDE WILL COMPROMISE THE GAUGE HEAD SEALS.
2.2 TRANSMITTER - EXTERNAL
ELECTRONIC COVER PLATE
GAUGE HEAD
[A] COVER
[B] COVER STAKE
SCREW
INTERNALS
SEE [E] THRU [L]
[C] BOX
[D] TRANSITION
COUPLING
ROADSIDE
REDTAIL
Transmitter
rotates
[L] OPERATOR BUSHING
[D] TRANSITION
COUPLING
2.4 TRANSMISSION (GH II AND GH III)
[M] IDLE GEAR
(LARGER)
[N] DRIVE GEAR
(SMALLER)
[O] TRANSMISSION
[G]
CHASSIS
[P] TRANSMISSION
CENTRE AXLE
[J]
2.5 PCB
[S] R10 TRIMMER
[Q] TEST POSTS
TP3 & TP4
[R] R13 TRIMMER
[E] [F]
[U] R19 (SPAN)
TRIMMER
[H]
3.0 BASIC INSTALLATION
NOTE: BEFORE STARTING INSTALLATION, READ AND UNDERSTAND ALL THE
INSTRUCTIONS PROVIDED BELOW.
3.1 TOOLS REQUIRED
Transmitter Installation
Redtail
Wrenches ............................................................ 7 / 16 in and 9 / 16 in
Pliers ....................................................Vise-grip style locking pliers
Roadside
Wrenches .............................................................. 7 / 16 in and 1 / 2 in
Pliers ....................................................Vise-grip style locking pliers
Electrical Connections & Calibration
Allen Key ................................................................................. 7 / 64 in
Screw Driver ........................................................... 1 / 8 in wide Slot Driver
Loop Calibrator ...................................................................... Fluke 789 or Eq.
Or: Multimeter ...................................................... Fluke 187 or Eq.
and Power Supply ....................................................... 13 – 24 VDC
and Load Resistance ........................................................... see 7.3
[T] TEST POSTS
TP1 & TP2
[V] R20 (ZERO)
TRIMMER
GOSHAWK INSTALLATION, OPERATION AND TROUBLESHOOTING MANUAL. 1
Hawkeye Industries Inc. 1-800-910-4295 www.hawk-eye.com
3.2 PARTS REQUIRED
1 ea. ......................... Electronic Cover Plate (if not factory-equipped)
1 ea. ................................................ Goshawk Transmitter (included)
2 ea. ........................... 1/4 -20 UNC x 3/4 Hex Cap Screw (included)
and ........................... Existing Loop Power Process Controller / PLC
26.) Connect the (+ V) lead from the power supply to the (+) PCB Terminal [E]
27.) Connect the Red (mA) lead from the multimeter to the
(-) PCB Terminal [E].
28.) Connect the Black (COM) lead from the multimeter to the (-) or (GND)
Terminal of the DC Power Supply through your Load Resistance.
29.) Continue to Section 3.5 using the multimeter display to calibrate the
transmitter. Be sure to connect your process controller following calibrations.
3.3 INSTALLING ON THE GAUGE HEAD
3.3.1 CONFIRM GAUGE HEAD ORIENTATION AND
OPERATION
Before installing the Goshawk Transmitter, it is imperative that the gauge head is
installed correctly. Refer to the gauge head installation instructions and the direction
diagrams in Section 1.3, noting:
Redtail: Facing the gauge board, the indicator cable will be exiting from the front, right
half of the Gauge Head (Atmospheric Side).
Roadside:. Facing the gauge board, the indicator cable will be exiting from the
underside of the left half of the Gauge Head (Atmospheric Side).
Do not proceed with Goshawk Installation until the gauge head resemble the figures in
Section 1.3.
3.3.2 REMOVE STANDARD COVER PLATE (IF REQUIRED)
If the gauge head has been shipped from the factory already prepared for transmitter
installation, the electronic cover plate will already be installed on the atmospheric side
of the gauge head. If this is the case, skip to Section 3.3.3 to zero out the float and
indicator.
1.) Using the 9 / 16 Wrench (Redtail) or 1 / 2 Wrench (Roadside), remove the
three retaining bolts holding the standard cover in place. Keep these bolts.
2.) Remove the standard cover, and set aside. You will no longer require this
cover plate for this installation.
3.) Place the Electronic Cover Plate on the Atmospheric Side of the gauge head,
and align the three mounting tangs to the bosses on the gauge head.
4.) Replace the 3 retaining bolts, and tighten wrench-tight.
TO STOP
FIGURE 6 PREPARING TRANSMITTER
CAUTION: THE GAUGE HEAD REELS CAN GENERATE CONSIDERABLE ROTATING
INERTIA IF EXCESSIVE FO RCE IS USED TO MANUALLY MOVE THE F LOATINDICATOR SYSTEM. THIS INERTIA CAN EASILY OVERTURN THE ENCODING
POTENTIOMETER, AS WELL A S INTRODUCE SLACK INTO THE FLOAT A ND
INDICATOR CABLES, LEADI NG TO TANGLES OR BINDING I NSIDE THE GAUGE HEAD.
FOR THIS REASON, IT IS STRONGLY RECOMMENDED THAT NO ROPE OR OTHER
MEANS OF MOVING THE INDI CATOR FROM THE GROUND BE USE D WITH A DRYSEAL GAUGE HEAD -- WITH OR WITHOUT -- A GOSHAWK TRANSMITTER.
[STEP 8.) AND 9.)]
3.3.5 MOUNT TRANSMITTER
10.) Place the Transmitter on the Electronic Cover Plate, ensuring th e
TRANSITION COUPLER [D] mates with the gauge head axle without binding.
11.) Align the mounting tangs on the Goshawk Box [C] to the tapped holes on the
Electronic Cover Plate. Partially thread in the included 1 / 4 UNC x 3 / 4 Hex
Cap Screws to hold the transmitter in place.
12.) If the reel was secured in Section 3.3.2 release the vise grips.
13.) Gently rotate the reel in the Filling Direction (COUNTERCLOCKWISE). Ensure
that the reel is able to rotate freely, and does not bind against the transition
coupling. If there is some binding, allow the transmitter to self-centre on the
cover over the course of a few rotations.
14.) Once running smoothly, replace the vise grips (again, if the zero point is not
at the bottom of the tank) and tighten the 1 / 4 UNC x 3 / 4 Hex Cap Screws
the rest of the way to secure the transmitter to the gauge head.
1/2 TURN
FIGURE 8 PCB POWER CONNECTIONS. [STEP 17.) TO 29.)]
3.5 CALIBRATION
3.5.1 SET ZERO
NOTE: IF YOU ARE UNABLE TO SE T THE TANK TO THE ZERO CONDI TION BECAUSE
IT IS PARTIALLY FULL OR IN SERVICE, REFER TO SECTION 4.2 FOR NON-EMPTY
ZERO POINT SETTING.
30.) With all the gauge components free to rotate, move the indicator and float to
the TANK EMPTY POSITION, if not there already.
31.) Locate the R20 (ZERO) trimmer [V] on the PCB
FIGURE 9 ZERO TRIMMER [STEP 30.) TO 33.)]
32.) Power up the transmitter, and note the output current on your calibration
device.
33.) Adjust R20 (ZERO) [V] until output current to read 4 mA.
FIGURE 4 REDTAIL SHOWN, SAME PROCESS FOR ROADSIDE
3.3.3 ZERO OUT FLOAT AND INDICATOR
IMPORTANT: THE FOLLOWING STEPS REQUIRE THAT THE MECHANICAL
CALIBRATION STEPS FROM THE GAUGE HEAD INSTALLATION HAVE BEEN
PERFORMED. ENSURE THAT WH EN THE FLOAT IS IN THE ZER O (EMPTY)
POSITION, THE INDICATOR I S AT THE TOP OF THE GAUGEBOARD . FAILURE TO
ENSURE THIS MAY RESULT IN DAMAGE TO THE ENCODING POTENTIOMETER.
5.) If not already there, put the system into the TANK EMPTY POSITION.
[STEP 1.) TO 4.)]
Manually rotate the exposed Atmospheric Side cable reel in the Emptying
Direction (CLOCKWISE) until the float is in the empty position (i.e. resting on
the tank floor).
FIGURE 7 MOUNTING THE TRANSMITTER TO THE GAUGE HEAD
[STEP 10.) TO 14.)]
NOTE: THE TRANSMITTER’S CONDUIT C ONNECTIONS CAN EITHER BE ON TOP OF
TRANSMITTER, OR ON BOTTOM OF TRANSMITTER. SELECT THE BEST
ORIENTATION FOR YOUR APPLICATION. IT IS GENERALLY SUGGESTED THAT THE
OPEN CONDUIT CONNECTI ON EXITS AWAY FROM THE GAUGE BOARD.
3.4 MAKING POWER CONNECTIONS
3.4.1 REMOVE GOSHAWK COVER
15.) Use the 7 / 64 Allen Key to loosen the staking screw [B] on the cover [A]
16.) Unscrew the cover [A] and set down. The PCB [H] and terminal blocks will
be visible. Ensure the sealing O-Ring between the cover [A] and box [C]
remains in place.
3.4.2 MAKE POWER CONNECTIONS
Determine how you are calibrating your transmitter and go to the corresponding steps.
a.) If the indicated current is below 4 mA, turn the R20 (ZERO) trimmer
[V] CLOCKWISE until the current increases to 4 mA.
b.) If the indicated current is above 4 mA, turn the R20 (ZERO) trimmer
[V] COUNTERCLOCKWISE until the current decreases to 4 mA.
NOTE: THE MINIMUM INDICA TED CURRENT WILL BE APPROXI MATELY 3.1 – 3.2
MA. IF THE INITIAL FACTOR Y SETTING OF THE R20 TRI MMER IS FAR ENOUGH
OUT OF RANGE, THERE WILL BE VERY LITTLE CHANGE IN THE OUTPUT CURR ENT
UNTIL THE TRIMMER GETS BACK IN RANGE.
WHEN TURNING THE TRIMMER CLOCK WISE, THE OUTPUT CURRENT MAY BRIEFLY
APPEAR TO DROP AS THE ZERO TRIMMER MOVES INTO THE LINEAR
ADJUSTMENT RANGE. KEEP TURNING CLOCKWISE TO INCREASE THE OUTPUT
CURRENT.
IF ALL 23 TURNS OF THE ZERO TRIMMER HAVE BEEN TRAVERSED WITH NO
CHANGE IN THE OUTPUT CURRENT, THIS MAY BE INDICATIVE OF AN DAMAGED
ENCODING POTENTIOMETER. REPLACE THE ENCODING POTENTIOMETER PER
SECTION 5.2 AND REPEAT THE ABOVE SERIES OF STEPS.
3.5.2 SET SPAN
34.) Move the indicator to the bottom of the gauge board, which will bring the
float to the top and put the system in the TANK FULL POSITION. Prevent the
float from dropping back down by securing indicator reel to the gauge cover
using vise grip pliers.
35.) Locate the R19 (SPAN) trimmer [U] on the PCB
A.) If you are using your existing process controller or follow Steps 17.) to 20.).
B.) If you are using a Fluke 789 or eq. Process Meter, follow Steps 21.) to 24.)
FIGURE 5 DIRECTION TO ROTATE TO ZERO OUT THE FLOAT AND
6.) If, in the TANK EMPTY POSITION the float is:
7.) Secure the reel in place against the cover using the vice grip pliers to prevent
INDICATOR. LEFT: REDTAIL, GAUGE BOARD TO LEFT.
RIGHT: ROADSIDE, GAUGE BOARD TO RIGHT
(COVERS OMITTED FOR CLARITY.) [STEP 5.)]
a. NOT resting on the tank floor
(i.e. it is suspended above the floor, or the tank has an ungauged
conical bottom); or,
b. the tank is not empty, and cannot be made empty
Use the position of the indicator to set the TANK EMPTY POSITION. Rotate
the reel as indicated in Step 5.) until the indicator is at th e top of the gauge
board. In the case of the non-empty tank, this will feed some loose float
cable into the tank, so care will need to be taken to slowly take that up when
moving onto Step 34.)
the reel from turning throughout the next steps.
3.3.4 PREPARE TRANSMITTER
8.) With the bottom of the transmitter facing you, rotate the TRANSITION
COUPLER [D] in the Emptying Direction (COUNTERCLOCKWISE) until it
stops. DO NOT OVER ROTATE!
9.) Turn the TRANSITION COUPLER [D] 1/2 revolution in the Filling Direction
(CLOCKWISE). This is required, and provides a rotational buffer so the
encoding potentiometer is less likely to overturn during normal operation.
C.) If you are using a Fluke 189 or eq. Multimeter with separate DC Power
Supply, follow Steps 25.) to 29.)
A.) PROCESS CONTROLLER /PLC
17.) Connect the positive (+ 13 to +24 VDC) line from the PLC to the (+) PCB
terminal [E], and secure in place with the 1/8 slot driver
18.) Connect the negative line from the PLC to the (-) PCB terminal [E] and
secure terminal contact in place with the 1/8 slot driver.
19.) If you require a shield connection, run it to the (S) PCB ter minal [E] and
secure terminal contact in place with the 1/8 slot driver.
20.) Continue to Section 3.5, using the output from your PLC to calibrate the
transmitter.
WARNING: ENSURE THE TWO-WIRE LOOP CABLES ARE RUN OUT OF THE CONDUIT
PORT ON THE GOSHAWK BODY, OBS ERVING PROPER HAZLOC WIRI NG PRACTICES
PER CSA C22.1 SECTION 18 / APPENDIX J.
B.) PROCESS METER
21.) Ensure the leads from the process meter are connected to the correct po rts
(Red to + SOURCE, Black to – SOURCE), and the meter is set to mA Loop
Power
22.) Connect the (+ SOURCE) Lead to the (+) PCB Terminal [E]
23.) Connect the (- SOURCE) Lead to the (-) PCB Terminal [E]
24.) Continue to Section 3.5 using the Process Meter Display to calibrate the
transmitter. Be sure to connect your process controller following calibrations
C.) MULTIMETER + DC POWER SUPPLY
25.) Ensure the leads from the process meter are connected to the correct po rts
(Red to mA, Black to COM), and the meter is set to read mA.
FIGURE 10 SPAN TRIMMER [STEPS 34.) TO 37.)]
36.) Note the current output on your calibration device.
37.) Adjust R19 (SPAN) [U] until output current to read 20 mA.
a.) If the indicated current is below 20 mA, turn the R19 (SPAN)
trimmer [U] CLOCKWISE until the current increases to 20 mA.
b.) If the indicated current is above 20 mA, turn the R19 (SPAN)
trimmer [U] COUNTERCLOCKWISE until the current decreases to 20
mA.
NOTE: IF ALL 23 CLOCKWI SE TURNS OF THE SPAN TR IMMER HAVE BEEN
TRAVERSED, AND THE OUTPUT CURRENT IS STILL BELOW 20 MA, ADJUST THE
SPAN SENSITIVITY RESISTANCE DOWNWARD (SEE SECTION 4.1).
IF ALL 23 COUNTERCLOCKWISE TURNS OF THE SPAN TRIMMER HAVE BEEN
TRAVERSED, AND THE OUTPUT CURRENT IS STILL ABOVE 20 MA, ADJUST THE
SPAN SENSITIVITY RESISTANCE UPWARD (SEE SECTION 4.1).
3.5.3 CONFIRM CALIBRATION
38.) Remove the vise grips from the reel and cover so the system is free to rotate.
Gently allow the float to return to the TANK EMPTY POSITON
2 REVISION D0, MARCH 2014
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