hc-485-1000 Measurement Specialties, hc-485-1000 Datasheet

hc-485-1000

Manufacturer Part Number

hc-485-1000

Description

Hc-485 Series - Digital I/o Lvdt

Manufacturer

Measurement Specialties

Datasheet

1.HC-485-1000.pdf (4 pages)

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DESCRIPTION

The HC-485 Series of heavy-duty LVDTs are self-contained, ultra precision, digital I/O devices for high

performance measurements in environments containing moisture, dirt, and fluid contaminants. The HC-485

eliminates the need for expensive and error-prone analog to digital conversion by internally converting the

analog LVDT signals into engineering units (imperial or metric). The result is a fully calibrated and traceable

measurement device, ready for installation, and 100% field interchangeable.

Operating on 8.5 to 30 VDC supply, the HC-485 provides an addressable RS-485 (2-wire) digital output

(MODBus RTU and ASCII protocols) running at 119kBd baud rate and capable of handling up to 32 devices

communicating over two wires. MIN, MAX and TIR readings are sampled and stored internally at a maximum

update rate of 600 samples per second, and are provided to the host on demand. A velocity output (inch or mm

per second) is also available, while an internal tare (zero) function affords maximum set-up flexibility.

MEAS offers accessories and options such as mating connector plugs, imperial or metric threaded core, guided

core, and captive core. The ‘EA’ option extends the linear stroke range to 150% with ±0.1% linearity.

Captive core option: The HC-485 features an optional captive core design that greatly simplifies installation. The

core rod and bearing assembly includes a Bronze bearing on the front end for self-alignment, while a Teflon

sleeve allows low-friction travel through the stainless steel boreliner (spool tube). The core rod and the bearing

assembly are both field serviceable.

Also see our other models: DC-EC (±DC voltage), DC-SE (single-ended dc voltage), HCD (hermetically sealed,

bi-polar dc voltage) and the HCT-IS (intrinsically safe, 4-20mA, 2-wire loop-powered).

Measurement Specialties, Inc. (NASDAQ MEAS) offers many other types of sensors and signal conditioners.

Data sheets can be downloaded from our web site at:

MEAS acquired Schaevitz Sensors and the Schaevitz

FEATURES

HC-485 Series Rev. 2

HC-485 Series - Digital I/O LVDT



All-welded stainless steel construction

MS type connector (MIL-C-5015)

MOD-Bus RTU & ASCII protocols

Programmable filtering

Velocity output

Field interchangeable

Calibration certificate supplied with each unit

www.meas-spec.com

http://www.meas-spec.com/datasheets.aspx

1/4

trademark in 2000.



APPLICATIONS

RS-485 output

±0.25% of FS max (±0.1% optional) linearity

32 devices communicating over 2 wires

MIN, MAX and TIR readings

Velocity output

Internal tare (zero) function

Stroke ranges from ±0.05 to ±3 inches

IEC IP68 rating to 1,000 PSI [70 bars]



Process control

Valve position feedback

Roller gap

Automated test systems

X-Y Positional Feedback

Remote Monitoring

Applications where wiring must be minimized

2011-december

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hc-485-1000 Summary of contents

Page 1

... The ‘EA’ option extends the linear stroke range to 150% with ±0.1% linearity. Captive core option: The HC-485 features an optional captive core design that greatly simplifies installation. The core rod and bearing assembly includes a Bronze bearing on the front end for self-alignment, while a Teflon sleeve allows low-friction travel through the stainless steel boreliner (spool tube) ...

Page 2

... HC-485 Series - Digital I/O LVDT PERFORMANCE SPECIFICATIONS Parameter HC485-050 ±0.050 Stroke range [±1.27] Stroke range ±0.075 ‘EA’ option [±1.91] Temperature coefficient of scale factor 0.025%/°F [0.05%/°C], maximum Input voltage 8 VDC Input current 50mA Output RS-485 (MODBus RTU and ASCII protocols) ...

Page 3

... Bore depth 1.17 “C” [29.7] Core center @ null 0.54 “P” [13.7] MECHANICAL SPECIFICATIONS, CAPTIVE CORE OPTION HC485-050 HC485-125 HC485-250 HC485-500 HC485-1000 HC485-2000 HC485-3000 Main body length 3.67 “A” [93.2] 0.84 Core center at null “P” [21.3] Core rod position 3.69 at null “R”” ...

Page 4

... Captive core Captive core, metric threaded extension (M4x0.7-8g) Note: Add multiple option dash numbers together to determine proper ordering suffix Example: HC-485-1000, ±1 inch, ‘EA’, captive core, metric, P/N 02561016-208 Core connecting rod, 6 inches long, 4-40 threads Core connecting rod, 12 inches long, 4-40 threads ...

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