setpoint devices
VERIS INDUSTRIES
800.354.8556
+1 503.598.4564
www.veris.com
APPLICATIONS
● Hospitals and operating rooms, pharmaceutical labs
● Clean rooms
● Food processing plants
● Environmental testing facilities, and other institutional applications
FEATURES
● Independent RH and T (HT relay) or analog setpoint outputs (HT analog)
provide application exibility
● LCD for local display of readings and setup values
● Oset function adjusts calibration intervals for both RH and T (HT models)
● Switch-selectable 4-20mA or 0-10V/0-5VDC analog outputs
● Multi-point calibration to 1% RH, traceable to NIST
● Replaceable RH sensor element supports eld calibration oset...saves time
● Semiconductor temperature sensor can be eld calibrated
Independent RH, Temp, and
Analog Setpoint Outputs
Wall Mount Humidity
Transmier Thermostat
Humidistat Functions
DESCRIPTION
All HT/HWS Series institutional grade relative humidity/temperature transmitters
are designed to meet the rigorous needs of pharmaceutical labs, hospitals, science
labs, and other settings that call for precise environmental control. Internal jumpers
control access to a feature that allows adjustment of the calibration osets. The
devices can also be made tamper resistant using a jumper to disable keypad
programing functions. HT/HWS models are calibrated with NIST traceable
calibration equipment.
Analog Output Transmitter
Analog output models feature a keypad to make adjusting humidity and
temperature setpoint values easy. They transmit the setpoint values back to a control
system by means of dual outputs. A slide-switch allows easy selection of output
type, either 4-20mA or 0-5V/0-10VDC signals. Dual outputs enable eortless control
of both humidity and temperature in a single, compact sensor.
Setpoint Relay Transmitter
The HT Series setpoint relay models also oer thermostat or humidistat functionality.
Two separate relays can be congured to control heating and cooling when in
thermostat mode, or humidifying and de-humidifying when in humidistat mode.
HWS models oer the same precise humidity measurement and control as the HT,
but without the temperature and thermostat features.
SPECIFICATIONS
Input Power 15 to 30VDC/24VAC, 100mA max.
Outputs, Analog Switch-selectable 4-20mA, or 0-10V/0-5VDC (switch aects both outputs)
Outputs, Relay (Relay models only) 2 Form C (SPDT), 1A 30VDC, resistive, 30W max.
HS Element Digitally proled thin-lm capacitive (32-bit mathematics) U.S. Patent 5,844,138†
Accuracy at 25°C from 10-80% RH* (Multi-point calibration NIST traceable) ±2%, 3%, or 5% models ; ±1% at 20-50% RH on HTA models
±1% at 12-40% RH on HTR models in mA output mode; ±1% at 30% RH on HTR models in voltage output mode
Reset Rate** 24 hours
Stability ±1% @ 20°C (68°F) annually, for two years
Hysteresis RH: 1.5% (typical), Temp: 1° to 10°F in 1°F increments
Linearity Included in accuracy spec.
Operating Humidity Range 0-100% RH non-condensing
Temperature Coecient ± 0.1%RH/°C above or below 25°C (typical)
Operating Temperature Range 10° to 35°C (50° to 95°F)
Temperature Accuracy ±1.0°C (±1.8°F)
Scaling RH: 0-100%; Temp: 10°to 35°C (50° to 95°F) or 0° to 50°C (32° to 122°F) menu selectable
Calibration Oset RH: Adjustable ±10% in 0.1% increments; Temp: Adjustable ±10° in 0.1° increments
Setpoint Range RH: 10-80% in 1% increments; Temp: minimum to full scale in 1°F increments
† The HS sensing element has a 1-year warranty. The element is not a part of the 5-year product warranty.
* Specied accuracy with 24VDC supplied power with rising humidity
**Reset Rate is time required to recover to 50% RH after exposure to 90% RH for 24 hours
One side of transformer secondary is connected to signal common, so an isolation transformer or dedicated power supply may be required.
RTD/Thermistors in wall packages are not compensated for internal heating of product.
HT
HT/HWS SERIES
HQ0001872.B 01131
(2 pagine)
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