6 Guttman Boulevard, Charleroi Industrial Park, Charleroi Pennsylvania 15022
(800) 487-8450; Fax: (724) 489-9772 Page 3 of 17 http://www.conspec-controls.com
1.0 GENERAL DESCRIPTION
The Universal Gas Transmitter is a micro-controller based electronic sensor that accepts signals
delivered by several types of industry standard cells including Electrochemical, Catalytic Bead,
Infrared, Photo-Ionization & Thermal Conductivity to determine ambient levels of target gas. The
monitor can operate stand-alone, providing local display and alarm indication, or it can be
connected to a larger fixed point detection system by incorporating the 900773 MODBUS protocol
2W 485 communications trunk adapter board. Alternatively, a 4-20 mA current signal is provided
when the instrument is used as a remote sensor.
Alarm indicators are provided on the monitor. Normal condition will cause a green visual indicator to
blink once every two seconds. If the first level of alarm is exceeded, this indication will change to
one red blink every two seconds. When the second level of alarm is exceeded, the red visual
indicator will blink twice every two seconds. Available options include the 900773 Modbus - Alarm
Relay Board. The 900773 contains three SPDT relays that activate via the programmable alarm set
points. Optional self contained or remote audible and visual alarms can be connected with the
incorporation of the Relay Board. This also enables control devices to be activated during an alarm
condition. The monitor has a 2-line, 8-character alphanumeric Liquid Crystal Display that is used to
display status, readings, and prompts to the user. User configuration and status indication is
initiated via keypad entry. The standard keypad is a self-contained infrared encoder. The Universal
Transmitter is temperature compensated over its entire range of operation in software. The one-
person calibration feature is simple and adjustment free.
2.0 TECHNICAL DESCRIPTION
Control Voltage: 12-24 Volt DC, Approx. 100mA typical load
Analog Output: 4-20 mA current source standard
Operating Temperature: -20 to +50 degree Centigrade
Humidity: 10-95%, non-condensing
Accuracy: +/- 2% Full Scale
Repeatability: +/- 2% Full Scale
Stability: +/- 2% over 24-hour test, full temperature range
To Next Page
Loading...