WILKERSON INSTRUMENT CO., INC.

LP420 Loop Powered Process Indicator
In Explosion Proof Housing 3.5 Digit Display

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LP420

LP420
Loop Powered
Process Indicator
In Explosion Proof Housing
3.5 Digit Display

$570.00

We will calibrate this field rangeable product to your specifications at no charge.  It can be changed in the field if desired.

The following information must be entered to complete your order:
See "Specifications" below for Input and Display range limits.

Input:
  Display Action
Display: Zero Scale
Full Scale
Units (Optional)

Quantity:
  • Features
  • Description
  • Specifications
  • Dimensions
  • Connections
  • Provides 3½ Digit Liquid Crystal (LCD) Readout Proportional to a Process Loop Current
  • Loop Powered
  • Trailing Dummy Zero (±19990)
  • Switch-Selectable Engineering Units/Loop Current Display
  • Explosion-Proof Housing
  • 5 Year Warranty

The LP420 Loop Powered Display provides digital indication of a 4/20 mA or 10/50 mA process loop signal. The display takes its operating power from the loop current and requires no other source of power.

Wide-ranging zero and span adjustments plus switch- selectable decimal point location and trailing zero allow the display to be calibrated in engineering units. An Engineering Units/Loop Current switch permits a quick check of the process signal without recalibration.

The LP420 is mounted in an explosion-proof housing and operates from -40° to 185°F (-40 to 85°C). The circuit boards are conformal coated for protection from humidity and contamination.

TYPICAL APPLICATIONS
Displaying process variables where line power is NOT available, and in hazardous (explosive) atmospheres.

INPUT RANGE
4/20 mA or 10/50 mA

INPUT VOLTAGE DROP
3.5 V max (equivalent to 175 ohms at 20 mA or 70 ohms at 50 mA)

ACCURACY
±(0.05% of reading plus 1 digit)

DISPLAY
Digit Size 0.35" LCD, 3½ digits, ±1999
Switchable Decimal Points and Trailing Zero ±1.9.9.9 0
Control Range
Zero ±1999
Span (full scale minus zero) min span 10/max span 3998
Update 3/sec

DISPLAY SWITCH
Allows quick check of loop current (400/1999 or 100/500).
Decimal point remains in “Engineering Units” position.

OPERATING TEMPERATURE
-40°F to 185°F/-40°C to 85°C

TEMPERATURE STABILITY
±(0.01% of span plus 0.01% of display zero offset)/°C

POWER
Supplied by input current no separate power required

HOUSING
Explosion-proof (Killark HK Series)
Housing is: FM Approved and CSA Certified for the following locations:
Class I, Divisions 1 and 2;
Groups B, C, and D
Class II, Divisions 1 and 2;
Groups E, F, and G
Class III,
Nema 3, 4, 7, and 9
International Approvals (IEC)

* HK series enclosures are designed to meet flameproof requirements as defined by CENELEC
(EURONORM Standard 50018)
* BASEEFA Certified

LP420 Dimension Drawiing

PIN +
PIN -
PIN Center Pins
Input +
Input -
Tie Points
Specifications    Manual

Solutions Provider for Signal Conditioning and
Process Control Instrumentation