Installation guide – Veris Industries HD SERIES Install User Manual

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Z201380-0V

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HD SERIES

INSTALLATION GUIDE

For 4–20 mA versions: Test leads output 0-1 VDC 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 the motherboard
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 the motherboard functionality using the test leads, remove the sensor
element. A 1.0 VDC reading verifies motherboard functionality.

To verify sensor accuracy, de-power the unit and insert a replacement HS element.
Repower the unit and compare readings to the original sensor. For example, if test
points read 0.40 VDC (40% RH) with the original sensor, and 0.45 VDC (45% RH) with
the replacement sensor, then 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.

The filter may be washed using warm water and a soft brush. Do not attempt to scrub
the HS element.

For 0-5V/0-10V versions, use the output as a test point and scale accordingly.

Test leads and voltmeter
verify accuracy and simplify
DDC programming

1VDC

0.42

ITE (

(--)

Voltmeter shows reading of 42% RH

TEST POINTS AND SETUP VERIFICATION

SENSOR REPLACEMENT

Observe precautions for handling static sensitive

devices to avoid damage to the circuitry that

is not covered under the factory warranty.

1. Disconnect power to the unit.

2. Remove the probe from the junction box by loosening the black swage nut and

sliding it out.

3. Unscrew the filter on the tip of the probe. Set filter aside.

4. Remove the HS element by gently pulling from the pin connector. Do not attempt

to remove the temperature sensor adjacent to the HS element (if equipped).

5. Place a new HS element onto the pin connector. Orient as shown, or the unit will

not function (the filter will not screw on if the HS is inserted incorrectly).

Top

Side

Bottom

Side

Top Side

Bottom Side

Temp Sensor

(if equipped)

6. Replace the filter. Re-insert the probe into the junction box and tighten the swage

nut.

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 the appropriate element accuracy to
match the motherboard accuracy for compatability.