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PAGE 3 ©2009 Veris Industries USA 800.354.8556 or 503.598.4564 / suppor[email protected] 02092Alta 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.
Disconnect power to the unit.1.
Remove probe from junction box by loosening black swage nut and sliding out.2.
For 4–20 mA versions: Test leads output 0-1VDC corresponding to 0 to 100% RH
sensor reading. For example, a 0.42 VDC output on test points equals 42% RH sensor
reading. These test points also provide an output that verifies mother board accuracy
when the HS element is removed. CONNECT TEST POINT LEADS TO VOLTMETER ONLY.
This output is not suitable for connection to a DDC panel.
To check motherboard accuracy using the test leads, remove sensor element. 1.0 VDC
reading verifies motherboard accuracy.
To verify sensor accuracy, de-power unit and insert a replacement HS element.
Repower unit and compare readings to original sensor. For example, if test points
read 0.40VDC (40% RH) with original sensor, and 0.45VDC (45% RH) with new
replacement sensor, the original sensor is 5% off specification. This method of
ensuring accuracy offers more precision than using slings or other devices, and it
eliminates the need to manually adjust sensors to an unstable standard.
Note: Temperature, body sweat, and breath effect humidity. Ensure that conditions
are stable to evaluate performance.
Filter may be washed using warm water and soft brush. Do not attempt to scrub HS
element.
For 0-5V/0-10V versions, use output as test point and scale accordingly.
Test leads and voltmeter
verify accuracy and simplify
DDC programming
1VDC
0.42
WHITE (+)
GREY(--)
Voltmeter shows reading of 42% RH
test PoInts and setuP verIfIcatIon calIbratIon-free sensor
The microprocessor-profiled capacitive HS element can be replaced in the field
without calibration.
Replacement HS Element Ordering Information
HS2xxx Replacement 2% HS Element, Duct
HS3xxx Replacement 3% HS Element, Duct
HS4xxx Replacement 5% HS Element, Duct
HS1Nx Replacement 1% HS NIST Element, Duct
HS2Nx Replacement 2% HS NIST Element, Duct
Replacement filters are provided with all elements. Order appropriate element
accuracy to match motherboard accuracy for compatability.
Observe handling precautions for static sensitive
devices to avoid damage to the circuitry which
would not be covered under the factory warranty.
troubleshootIng
Problem Solution
Filter tip does not fit on probe HS element is backwards; reverse element.
Unit reads approx. 4.5mA HS element is backwards; reverse element.
Unit reads 100% with new
replacement sensor
Unit must be unpowered when installing a new
sensor; interrupt sensor power to restart.
Accuracy appears incorrect · Remove HS element while powered and verify output
goes to full scale.
· Verify voltage test leads on 4-20mA models
corresponds to the 4-20mA output.
Remove HS element by unscrewing probe filter tip and gently pulling sensor board3.
from jack. Do not attempt to remove black temperature sensor next to board.
Install new HS element, observing orientation such that filter tip can be4.
reinstalled.
HS element
Optional temperature sensor
