Greystone Energy Systems SPC Series Catalog Page
HUMIDITY/TEMPERATURE
TRANSMITTER c/w SETPOINT
ADJUSTMENTS
SPC Series
Precision humidity/temperature
control/sensing
FEATURES:
• Dual humidity and temperature outputs
Humidity and/or temperature setpoint adjustment outputs
•
• Current and voltage models
• LCD indication
• Highly stable RH sensor element
• Attractive, low prole enclosure
Installer friendly wiring access
•
Peace of mind
through reliable
humidity/temperature
monitoring
GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM
DESCRIPTION:
The SPC Temperature/humidity transmitter incorporates two sensors in one attractive wall mount enclosure
for the most ecient environmental monitoring and control system. It uses a eld-proven RH sensor to
monitor relative humidity and a curve-matched thermistor to measure temperature.
Two setpoint controls are also available for temperature and humidity adjustment. The device may also
include an occupancy override button and an external communication jack. Both measurements and setpoint
signals are available on separate outputs as linear 4-20 mA, 0-5 or 0-10 Vdc signals.
Several congurations of the device are available with one to four outputs as required. An LCD is included for
conguration and local indication of all parameters. Several operating parameters can be programmed using
a keypad for specic applications including four temperature ranges and C/F display.
SPECIFICATIONS :
General
Power Supply.............................24Vac/dc ±10% (non-
isolated half-wave rectied)
Consumption.............................20 mA + (20ma x number of
outputs) max @ 24 Vdc
Input Voltage Eect.................Negligible over specied
operating range
Protection Circuitry..................Reverse voltage and MOV
protected and output limited
Output Signals...........................4-20 mA active (sourcing) or
0-5 Vdc or 0-10 Vdc
(specify when ordering)
Output Resolution ...................10 bit for all signals
Output Drive Capability.........550 ohm max for current
10Kohm min for voltage
Programming and Selection Via push buttons and
on-screen menu
Operating Conditions.............0˚-50˚C (32˚-122˚F) 0-95% RH
non-condensing
Wiring Connections.................Screw terminal block
(14 to 22 AWG)
Enclosure.....................................White ABS - IP30 (NEMA 1)
84mmW x 117mmH x 29mmD
(3.3” x 4.6” x 1.15”)
LCD Display
Display Size.................................38.1 x 16.5 mm (1.5” x 0.65”)
Digit Height................................11.43 mm (0.45“)
Symbols .......................................˚C, ˚F, %RH, OCC
Backlight......................................Enable or disable via menu
Temperature
Accuracy.......................................± 0.2˚C (±0.4˚F)
Range............................................0˚ to 35˚C (32˚ to 95˚F) or 0˚ to 50˚C
(32˚ to 122˚F) programmable
Oset ............................................±9˚ F programmable
Display Units ..............................˚C or ˚F programmable
Display Resolution ...................0.5˚ <100˚, 1˚ >100˚
Humidity
Sensor............................................ Thermoset polymer based capacitive
Accuracy....................................... ±2, 3 or 5% RH
Range............................................ 0 to 100% RH
Temperature Compensation. 0˚ to 50˚C (32˚ to 122˚F)
Hysteresis... ................................. ± 3% RH
Response Time........................... 15 seconds typical
Stability......................................... ±1.2% RH typical @ 50% RH in
5 years
Oset............................................. ±20% RH programmable
Humidity Setpoint
Midpoint...................................... 20 to 70% RH programmable
Range............................................ ±5, ±10 or ± 20% RH of the
midpoint, programmable
Resolution .................................. 1% RH
Manual Override
Type .............................................. Front panel, momentary pushbutton
Ratings ........................................ 50 mA @12 Vdc, N.O., SPST
Occupied Input
Signal Type ................................ Digital input, 0/5 Vdc standard,
active low
Action .......................................... Causes “OCC” segment to light on LCD
Fan Speed Switch
Type .............................................. Side mounted, 5 position slide switch
Designators ............................... O, Auto, Low, Medium, High
Signal ........................................... 2 wire, resistance output - 0, 2, 4, 6, 8 KΩ
Custom ranges available, contact
Greystone
Communications
3.5mm phono jack.................... Ring/Mid/Tip connections to
a 3-pin terminal block
Temperature Setpoint
Midpoint......................................18˚ to 27˚C or 65˚ to 80˚F
programmable
Range............................................±2 to ±10˚C or ±5 to ±20˚F
of the midpoint, programmable
Resolution...................................0.5 or 1.0˚C and 1.0 or 2˚F
programmable
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