Veris Industries H701 Install - Manual (Page 2)

6%2)3 INSTALLATION GUIDE H701
Z201482-0D PAGE 2 ©2009 Veris Industries USA 800.354.8556 or +1(0)503.598.4564 / [email protected] 08092
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
opEration
The H701 is a current-sensitive switching device 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 FET status output to change state, similar to the action of a
mechanical switch. 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 H701 requires no external power supply
to generate its output.
notEs
troublEshooting
Problem Solution
No Reading at Controller • Check sensor calibration (see above)
• Check for control voltage at sensor (<30V)
• Check for amperage in monitored conductor (> 1 A)
• 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.
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
0.5A
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
240A
300A: 5A
> 135A (Sensor max.)
For load currents greater than sensor maximum rating:
Use a 5 Amp (H68xx series) Current Transformer (CT) as shown.
CAUTION
RISK OF EQUIPMENT DAMAGE
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calibration
A. To monitor under-current (belt loss, coupling shear, status)
"
OK!
!
1. Use a Volt-Ohm meter to monitor the
current switch status. Turn setpoint screw
clockwise until current witch opens.
2. Slowly turn the screw counter-clockwise until the current switch closes.
3.Turn the screw an
additional 1/4 turn
counter-clockwise for
operational margin.
B. To monitor over-current (mechanical problems, seized impeller)
"
OK!
!
3. Turn the setpoint
screw an additional
1/4 turn clockwise for
operational margin.
1. Use a Volt-Ohm meter to monitor the
current switch status. Turn setpoint screw
counter-clockwise until current switch closes.
2. Slowly turn the setpoint screw clockwise until the switch opens.
OK!
45"564
OK!
45"564
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+
+
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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. < 1 A (Sensor Min.)