Veris Industries Hawkeye 939 User manual

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CURRENT MONITORING INSTALLATION GUIDE
Installer’s Specifications
Sensor Power Induced from monitored conductor
Insulation Class 600VAC RMS
Frequency Range 50/60Hz
Temperature Range -15° to 60°C (5° to 140°F)
Humidity Range 10-90% RH, non-condensing
Hysteresis 10% Typical
Terminal Block Maximum Wire Size 14 AWG
Terminal Block Torque (nominal) 4 in-lbs (0.45 N-m)
Agency Approvals UL 508 open device listing
Do not use the LED status indicators as evidence of applied voltage.
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Wiring ExamplE
H939 939
DimEnsions
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Removable Mounting Bracket
Self-gripping
Iris
1.0”
(25 mm)
0.8”
(21 mm)
1.1”
(26 mm)
3.1”
(79 mm)
2.8”
(70 mm)
Ø = 0.3”
(8 mm)
1.4”
(36 mm)
2.5”
(64 mm)
3.0”
(76 mm)
Bracket can be mounted
on either side for added
installation flexibility.
Use DIN Rail
Mounting clip
(Veris part
number AH01) to
mount on stan-
dard DIN rail.
quick install
Disconnect and lock out power to the conductor to be monitored.1.
Plan the installation:2.
Locate a mounting surface for the removable mounting bracket that will allow
the monitored conductor to pass through the iris, or “window” when it is installed
and keep the product at least ½” (13mm) from any uninsulated conductors (CE).
Determine cable routing for the controller connection, allowing wiring to reach
the mounting location.
Install mounting bracket3.
Drill holes to mount the bracket to the chosen surface using the included screws.
Wire the output connections between the sensor and the controller.4.
Snap thesensor over the wire to be monitored and clip the assembly to the5.
mounting bracket.
Close up and power up.6.
Fan or Pump
CONTROLLER
Motor
CONTACTOR
DI (Status)
DO (Relay
Coil)
CONTROL
POWER
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INSTALLATION GUIDE
H939
opEration
The H939 is a current-sensitive switching device with integral command relay that
monitors current (amperage) in the conductor passing through it. A change in
amperage in the monitored conductor that crosses the switch (setpoint) threshold
plus the hysteresis value will cause the resistance of the status output to change
state, similar to the action of a mechanical switch. This status information can be fed
back to a building controller that interprets the signal and separately switches the
relay. The status output can also be used to switch the relay directly.
In this model, the setpoint is adjustable through the action of a twenty (20) turn
potentiometer (see the CALIBRATION section). The status output is suitable for
connection to building controllers or other appropriate data acquisition equipment
operating at up to 30 volts. The H939 relay requires a 24VAC/VDC external power
supply for operation.
The H939 housing offers unprecedented mounting flexibility. The mounting bracket
can be attached in three different places. Additionally, the bracket is compatible with
the Veris AH01 DIN Rail clip, allowing DIN mounting.
notEs
troublEshooting
For load currents less than sensor minimum rating:
Wrap the monitored conductor through the center hole and around the sensor body
to produce multiple turns through the "window." This increases the current measured
by the transducer.
4x
1A
DANGER: 5A CTs can present hazardous voltages.
Install CTs in accordance with manufacturer's instructions.
Terminate the CT secondary before applying current.
H68xx-5A CT
> 135A (Sensor max.)
For load currents greater than sensor maximum rating:
Use a 5 Amp (H68xx series) Current Transformer (CT) as shown.
Problem Solution
No Reading at Controller • Check sensor calibration (see above)
• Check for control voltage at sensor (<30V)
• Check for amperage in monitored conductor (>2.5A)
• Assure that sensor core mating surfaces are clean and
that the core clamp is completely closed
Setpoint screw has no stops The setpoint screw has a slip-clutch at both ends of its
travel to avoid damage.Twenty turns CCW will reset
the sensor to be most sensitive. Repeat calibration
above.
Both LEDs are lit Setpoint screw is too far clockwise. See solution above.
CAUTION
RISK OF EQUIPMENT DAMAGE
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calibration
A. To monitor under-current (belt loss, coupling shear, status)
"
OK!
!
1. Turn setpoint screw
clockwise until Status OPEN
LED turns ON.
2. Slowly turn the screw counter-clockwise until the Status CLOSED LED just
turns ON.
3.Turn the screw an
additional ¼ turn
counter-clockwise for
operational margin.
B. To monitor over-current (mechanical problems, seized impeller)
"
OK!
!
3. Turn the setpoint
screw an additional
¼ turn clockwise for
operational margin.
1.Turn setpoint screw
counter-clockwise until Status
CLOSED LED turns ON.
2. Slowly turn the setpoint screw clockwise until the Status OPEN LED just turns ON.
OK!
45"564
OK!
45"564
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Before beginning calibration, establish normal load conditions.
OK!
"
OK!
Then choose either A or B below.
Controller must be
programmed to account for the
extra turns. e.g., if four turns
pass through the sensor (as
shown) the normal controller
reading must be divided by 4.
< 2.5 A (Sensor Min.)
240A
300A:5A
4A
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