HCT SERIES 4 to 20mA loop LVDT Transmitter SPECIFICATIONS 4-20mA, 2-wire current loop operation Stroke ranges from 0.25 to 10 inches Hermetically sealed, all welded Stainless steel housing MS style connector Shock and vibration tolerant IEC IP68 rating to 1,000 PSI 70 bars Captive core option (most models) The HCT Series LVDT transmitters are the perfect choice for high performance measurements in environments containing moisture, dirt, and fluid contaminants. Operating on a +10.5 to +28VDC loop voltage, the HCT delivers a smooth 4-20mA current loop output. True hermetic sealing of the coil assembly and electronics provides premium protection against adverse FEATURES environments. 4-20mA current loop output The integral electrical connector (welded, glass-sealed MS All-welded stainless steel type) provides for easy installation and allows replacing a construction damaged cable without sacrificing the sensor. MS type connector (MIL-C-5015) Imperial or metric threaded core Available in a number of standard linear measurement ranges from 0.25 to 10 inches, the HCT is ideal for process industries Reverse polarity protection and power plant applications, or wherever high accuracy Calibration certificate supplied with measurements are required in electrically noisy environments. each unit The 2-wire 4-20mA current loop output is compatible with most PLCs. APPLICATIONS Like in most of our LVDTs, the HCT windings are vacuum Process industries impregnated with a specially formulated, high temperature, Power plants flexible resin, and the coil assembly is potted inside its housing with a two-component epoxy. This provides excellent protection Valve position monitoring against hostile environments such as high vibration and shock. Rolling mill roller gap feedback Ideal for electrically noisy Captive core option: The HCT features an optional captive core environments design (available for most models) that greatly simplifies Outdoor use with long cable installation. The core rod and bearing assembly includes a Bronze bearing on the front end for self-alignment, while a PTFE sleeve allows low-friction travel through the stainless steel boreliner (spool tube). SENSOR SOLUTIONS /// HCT Series Rev 7 07/2017 Page 1 HCT SERIES 4 to 20mA loop LVDT Transmitter PERFORMANCE SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter HCT 250 HCT 500 HCT 1000 HCT 2000 HCT 5000 HCT 10000 Stroke range 0.25 6.35 0.5 12.7 1 25.4 2 50.8 5 127 10 254 Sensitivity, mA/inch mA/mm 64 2.52 32 1.26 16 0.63 8 0.315 3.2 0.126 1.6 0.063 Non-linearity, % of FR max. 0.5% 1% Temp. coefficient of sensitivity 0.022%/F 0.04%/C Loop supply voltage +10.5 to +28VDC Output 4 to 20mA (Output increases when the core is displaced from null towards the connector) Output at null position 12mA (null position is defined as the mid-stroke position) Max loop resistance 540 ohms +24VDC (see loop resistance chart below) Output noise and ripple 25 A, peak-to-peak maximum Stability 0.05% of FSO, after 30 minute warm up Frequency response 50Hz -3db ENVIRONMENTAL AND MATERIAL SPECIFICATIONS o o o o Operating temperature range -13 F to +185 F -25 C to +85 C Survival temperature -65F to +250F -55C to 125C Shock survival 250 g (11ms half-sine) Vibration tolerance 10 g up to 2kHz Housing material AISI 400 Series stainless steel Electrical connector 6-pin MS type connector (MIL-C-5015) IEC 60529 rating IP68 to 1,000 PSI 70 bars with use of proper mating connector plug Notes: All values are nominal unless otherwise noted Dimensions are in inch mm unless otherwise noted FR: Full Range is the stroke range, end to end FR=S for 0 to S stroke range FSO (Full Scale Output): Largest absolute value of the outputs measured at the ends of the range WIRING SCHEMATIC & LOOP RESITANCE CHART 700 600 540 500 400 300 Recommended 200 working range 100 0 10 12 14 16 18 20 22 24 26 28 10.5 Loop supply voltage, VDC SENSOR SOLUTIONS /// HCT Series Rev 7 07/2017 Page 2 Max loop resistance, Ohms