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SPECTRUM SENSORS & CONTROLS, INC. • 328 State Street • St. Marys, PA 15857 • Phone: 814.834.1541 • Fax:814.834.1556
E-mail: atp@SpecSensors.com • Web Site: www.SpecSensors.com
Features:
• Provides a standard 4-20mA signal output
• Linear output with respect to temperature
• Push button calibration
• Cost efficient design
• Sturdy construction
• Highly accurate response
• Suitable for in head or DIN rail mounting
Description:
The SS&C push button transmitter connects to a standard
10kΩ thermistor or 100Ω Pt RTD sensor and produces
a 4-20mA signal that is linear with temperature. The
transmitter can be mounted on a DIN Rail or in a junction
box for attaching directly to the temperature sensor or for
surface mounting to a wall or duct. A digital indicator
can also be incorporated.
The simple push of a button ranges and calibrates the
PBT420 transmitter. There is no need for jumpers or pot
adjustments. The high accuracy, stability, flexibility and
low cost of the PBT420 make it ideal to use in those ap-
plications where a 4-20mA output is desirable.
To calibrate the PBT420, connect a thermistor simulator
or resistance decade box to the input and a voltage be-
tween 8 and 30 VDC to the PBT420. Set the simulator or
decade box to the resistance value corresponding to the
desired temperature for an output of 4mA. Press and hold
the calibration button down until the LED starts to blink
and then release. Set the simulator or decade box to the
resistance value corresponding to the desired temperature
for an output of 20mA. Press the calibration button and
release. The LED continues blinking and then shuts off
confirming that the transmitter is calibrated.
A complete data sheet with input and output specifications
is available by contacting SS&C Engineering.
Push Button Temperature Transmitter
Ordering Information
SS&C Part Number
R
25 (W)
Material
Curve
PBT420-10KT 10,000 Z
PBT420-100R 100 Pt RTD
Resistance versus temperature data for material curve can be
found on page 59 and for Pt RTD can be found on page 70.
Push Button
Temperature
Transmitter
