DIGITAL GAGE TRANSMITTER
The GAGE-4000 is an integrated unit, used for reading of many sensor types, frequency, voltage, current, resistance and digital I/O pins. The unit may also output analog voltage, control I/O pins or PWM signals.
Various
types of sensors may be read by the GAGE-4000:
Thermocouples, Pressure transducers, RTD temperature sensors, Force and weight
transducers, resistive sensors (Thermistors, LDRs etc.). The unit reads the
sensor output, converts it to Engineering units (using an internal user's programmed
calibration curve) and transmits the results (in ASCII format) via a standard
RS-232 or RS-485 interface line to the host computer.
The GAGE-4000 contains an innovative A/D converter, with an adaptive resolution of up to 20 bits, designed especially for infield measurements. It's low current consumption and the ability to connect up to 128 unit on one communication line, makes the GAGE-4000 a perfect choice for making infield measurements, using battery power only. Its communication line can go to distances of up to 1.2 Km without any performance penalty or up to 20 Km, using relay units.
Features
Reading of J,K,R,S,T,B,C thermocouples, and detection
of an unconnected sensor. Reading of bridge
type sensors with an excitation of ±8V. Isolation of 500V
between sensor inputs and digital interface / Power supply. Linearization of
sensor reading using a polynomial fit. Zero reading for
all analog inputs. Simultaneous sampling
of up to 128 units. Cold junction compensation
. RS-232 or RS-485
communication. Nonvolatile memory
retains setup and sensor calibration. Low current consumption. Power save mode.GAGE-4000 models
Standard
(GAGE 4000)
Includes
one Thermocouple input, one RTD or resistance input, One differential (mV) input
or two single ended millivolts inputs (configured by software), 3 low-resolution (8 bit) A/D, 3
Digital I/O pins capable of being Input, Output or Open Collector type (one
of the I/O pins can be configured as a frequency / event counting input), one
PWM (analog) output and ± 5V excitation outputs.
GAGE-4001 Digital I/O
Includes
5 digital I/O pins (Input, Output, Open collector), 3 output pins, 3 Input pins
(one of inputs may be configured as a frequency / event counting input), one
PWM output and one +5V output for driving dry contact sensors/switches.
GAGE-4002 Special Units 
Capable
of reading voltages of up to 220V, current of up to 20A, Humidity, pH and other physical parameters. These units are manufactured per request, and a minimum order is required.
GAGE-4003 LCD Display
May
be connected to any of the above units. Capable of displaying the measured parameters
configured for this unit. (up to 4 measurements simultaneously), print messages
created by the user and read the status of 4 keyboard keys on the unit.
All units are software programmable via any standard communication software and can be chained using a standard 4-wire telephone line cable.
Any unit may be configured separately to read any of the connected sensors, or all of them together.
Drivers
available for LABVIEW, GENNIE, etc.
Applications
Process
control for factories and laboratories.
Sensor
reading in noisy environment.
Long time data acquisition,
using battery power.
Process control
and product inspection.
Measurement of various
physical parameters.
Simultaneous measurements
in separated locations.
Heating / cooling
energy control.
Multi station control.
Remote operation
of relays, valves etc.
Frequency or event
counting.
Low volume, low
weight, low cost measurements.
Technical
Specifications
Reading
accuracy of J,K,R,S,T,B,C thermocouples: ± 0.5
deg.C.
Excitation Voltage: ± 8V.
Isolation between
sensor inputs and digital interface / Power supply: 500V.
RS-232/RS-485 Transfer
Rate: 19,200 bps.
Environmental Conditions:
- Temperature Range: -20 to +60 deg.C,
- Relative Humidity: 5 - 95%, non-condensing.
Current consumption:
- In normal operation: 35 mA.
- In Power Save mode: 8 mA only.
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