Greenheck AMD-xx-TD Transmitter - Manual (Page 5)

5
2.1 – ACCURACY
Sensor Accuracy.
Velocity: ±2% of Reading
Temperature: ±0.1ºF
Overall System Accuracy.
Flow: ±2-3% of Actual Flow
Temperature: ±0.1ºF of Air Temperature
2.2 – RANGE
Velocity Calibration Range.
Low Range (0 to 5,000 FPM)
High Range (0 to 10,000 FPM)
Custom Range (consult Factory)
2.3 – PROBE ASSEMBLY
Mounting.
4 in. x 4 in. aluminum plate with four 0.25 in. holes for
fasteners and neoprene gasket.
Length.
8 in. up to 120 in.
Sensors Per Probe.
Maximum of 16
Connection.
Probe to Probe via RJ-45 cable for signal and power.
Probe to Transmitter via shielded cable with RJ-45
connection. 10 foot length standard with optional 50
foot and 100 foot lengths.
Temperature Limits.
–20ºF to 180ºF Storage
–20ºF to 140ºF Operating
Humidity Limits.
0 to 95% RH, non-condensing.
2 – PERFORMANCE SPECIFICATIONS
2.4 – TRANSMITTER
Display.
3 line, backlit graphical display. Flow on Line 1 is
double height and width for improved visibility. Lines
2 and 3 are standard size and are user selectable.
Output.
Dual analog outputs (0-5VDC, 0-10VDC, 4-20mA)
user selectable and configurable.
Configuration.
Via cover mounted membrane keypad
Filter.
Analog outputs filtered via user selectable digital low
pass filter.
Temperature Limits.
–20ºF to 180ºF Storage
–20ºF to 140ºF Operating
Humidity Limits.
0 to 95% RH, non-condensing
2.5 – POWER
Power Supply.
24VAC or 24VDC.
Power Consumption.
16 to 90VA dependent on number of sensor nodes (1 to
32 maximum)
Circuit Protection.
Power input is isolated, fused, and reverse polarity
protected. Earth Ground must be connected to the
terminal labeled "G".
3 – FEATURES
3.1 – OPERATOR MENU
The microprocessor program contains a Operator menu
system for selecting parameters.
Four pushbuttons UP, DN, ENT, and ESC allow the
operator access to the menu for setting configuration
modes and values. Refer to the Configuration
Programming (Section 5.6) instructions for operation
details.
Also contained in the Operator menu is an output
calibration feature. The calibration method is completely
digital and contains no analog potentiometer
adjustments which are susceptible to drift. Non-volatile
memory is used for storing all setup parameters and
calibration values, and will remain unchanged after set,
even when power to the unit is off.
3.2 – DATA DISPLAY
The Vari-Green Thermal Air Flow Transmitter utilizes a
high visibility backlit graphical LCD. 3/4" x 2-1/2" display
with three lines of process data, selectable for U.S. or
S.I. units. Also used for configuration interface.
3.3 – LARGE OPERATION RANGE
The Vari-Green Thermal Air Flow System can maintain
accurate and linear output of flows from 0 to 5,000 FPM
(Low Range) and 0 to 10,000 FPM (High Range). Consult
factory for custom range.
3.4 – ENCLOSURE
The Vari-Green Thermal Air Flow Transmitter is housed
in an aluminum NEMA 1 enclosure with hinged front
cover for access to power and signal terminals for field
connection.
3.5 – MULTIPLE OPERATING POWER
SELECTIONS
The Vari-Green Thermal Air Flow Transmitter can be
powered by either 24VAC or 24VDC.