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LR-Cal Kalibriergeräte / Calibration Equipment von / from DRUCK & TEMPERATUR Leitenberger - GERMANY

LR-Cal LPK 300-PP pressure calibration case with electric pressure/vacuum pumpPressure Calibration Case ±0,025% v.E.

Model LR-Cal LPK 300-PP

with integrated electric pump -0,85...+20 bar / -12...+300 psi

The compact designed pressure calibration case LR-Cal LPK 300-PP can be used portable as well as stationary. The rugged case makes it suitable for harsh operating conditions also.

The LR-Cal LPK 300-PP, through its integrated electric pump, enables the provision of -0.85 to +20 bar (-12...+300 psi). Due to the integrated electric pump, the operator can supply the test item to be calibrated with pressure or vacuum on-site and does not need any separate pressure supply for pressure ranges up to 20 bar. The fine pressure adjustment is to be carried out via the manual sensitive volume fine adjustment valve. 

The LR-Cal LPK 300-PP is a very user-friendly, accurate and compact solution for pressure comparison calibrations. The separately to be ordered reference sensor LR-Cal LPC-S is changeable. Several pressure ranges can be covered with one instrument.

All standard pressure ranges between 0...250 mbar (0...4 psi) and 0...1000 (0...14,500 psi) are available. For operations with pressure ranges over 20 bar, a pressure test pump is required in addition.

The pressure calibration case LR-Cal LPK 300-PP measures pressure, volts and milliamps and supplies 24 VDC as source for transmitters as unit under test. Calibration procedures can be pre-defined and used for calibrations on site. The LR-Cal LPK 300-PP is featured with an USB interface and is powered by a chargeable Lithium-Ion battery pack.


LR-Cal LPK 300-PP Description

LR-Cal LPK 300-PP pressure calibration case with electric pressure/vacuum pumpFeatures

  • Built-in electric pump to generate pressure / vacuum
    -0,85...+20 bar (-12...+300 psi)
  • Pressure ranges from 0...250 mbar to 0...1.000 bar
    (over 20 bar, in addition a pressure test pump has to be used)
  • Changeable pressure reference sensors LR-Cal LPC-S
  • All standard pressure units (plus one self-definable)
  • Gauge pressure, absolute pressure, vacuum, compound ranges
  • Conversion pressure to current or voltage
  • Conversion current or voltage to pressure
  • Stores calibration data (plus time stamp from integrated real time clock)
  • Pressure switch test function
  • Menu-driven operating in several languages (e.g. English, German, Italian, French, Spanish)
  • Large illuminated colour display
  • Power supply 24 VDC output for pressure transmitter as unit under test
  • Chargeable Li-Ion battery
  • USB interface
  • Certificate of calibration, traceable, for pressure, current and voltage

The separately to be ordered pressure reference sensors LR-Cal LPC-S are equipped with a welded stainless steel membrane, they are suitable for aggressive media, which do not destroy stainless steel 1.4571.

LR-Cal LPK 300-PP pressure calibration case with electric pressure/vacuum pump (this image shows also an unit under test)The LR-Cal LPK 300-PP features a complete numeric keypad and cursor block, for easy ans simple entering of data.

The pressure calibration case LR-Cal LPK 300-PP can be operated in three different modes:

Measuring Mode:
First, the operator defines the unit under test (analogue or digital, pressure range, accuracy class, pressure unit, gauge or absolute pressure, gaseous or fluid calibration medium, power supply 24 VDC on or off).

Then, the comparison calibration can be made: The display shows the pressure range of the LR-Cal LPC-S reference sensor, the true pressure measured by the LR-Cal LPK 300-PP, the pressure range of the unit under test, the output signal of unit under test (measured if it is a transmitter, to be entered manually if it is an analogue pressure gauge), deviation in selected pressure unit of unit under test, deviation in percentage of full scale value of unit under test.
With one view the operator sees whether the unit under test is within it's specification (accuracy class) or not - at every test point.

15 different pressure units are available for selection, plus an user-definable pressure unit. The resolution adjustment (decimal point setting) can be made very comfortable.

Calibration Mode:
In this mode, calibration procedures can be pre-defined, incl. management of units under test. One procedure has following data: Same like "Measuring Mode", plus Calibration Number (program no.), Serial number of unit under test, location number of unit under test, test pressure points (up to 32 for each unit under test), dwell time (seconds) between test pressure points.

Up to 16 units under test with each 32 test points can be managed by the LR-Cal  LPK 300-PP at a time.

Later on, it can be worked on the pre-defined calibration procedures, e.g. on site. The values are saved in the internal memory of the LR-Cal LPK 300-PP and can be transmitted to a PC via the USB interface.

Also, in this "Calibration Mode", the operator can see on one view whether the unit under test is within it's specification or not.

With the optional PC software LR-Cal  LPC-Cal the calibration data can be downloaded to a Windows-PC and printed out (via MS-Excel).

Pressure Switch Test Mode:
After specification of the unit under test (pressure range, power supply 24 VDC On/Off), the electronic pressure calibrator LR-Cal LPK 300-PP shows the actual status of the pressure switch.

Settable basic parameters:
Several basic parameters can be entered into the LR-Cal LPK 300-PP, e.g. ambient temperature, fluid level difference between reference and unit under test, Language (English/French/Italian/Spanish/German), Setting of the realtime clock, Setting of the display, Setting of the powersafe function, Indicating battery level, Tara value (offset), Indicating Min/Max values, Setting/indicating alarm values, Digital software filter, USB setting.

LR-Cal LPK 300-PP menu structure and operating modes

Pressure port for unit under test of LR-Cal LPK 300-PPPressure port for LR-Cal LPC-S reference sensor for  LR-Cal LPK 300-PP


LR-Cal LPK 300-PP Specification

Pressure supply bar -0,85...+20, with integrated electrical pressure / vacuum pump
Pressure fine adjustment   manual, via sensitive volume fine adjustment valve
Allowed media with integrated pump   Dry, clean and non-aggressive gases
Overpressure warning   audiovisual
Temperature compensation °C active, +15...+35°C (outside of this range: temperature coefficient 0.002% of span)
Wetted parts LR-Cal LPC-S   Stainless steel, welded
Pressure port LR-Cal LPC-S   1/2" BSP male, ranges up to 20 bar can be mounted in the case - 1/2" BSP female port with o-ring
Pressure port for unit under test   1/2" BSP female with o-ring
Resolution   adjustable, max. 6 digits
Voltage measurement V 0...1, 0...2, 0...5, 0...10
Voltage resolution mV 0.1
Voltage accuacy mV ±1 (incl. certificate of calibration
Current measurement mA 4...20, 0...20 (maximal load 1000 Ohm)
Current resolution µA 1
Current accuracy µA 5 (incl. certificate of calibration)
Voltage sourcing VDC 24 (min. 20 mA, max. 50 mA), tolerance ±1V, settable via menu
Operating temperature °C 0...50 (during charging of battery: 0...45)
Operating humidity % r.F. 35...85, non-condensing
Storage temperature °C -20...+60
Storage humity % r.F. 35...80, non-condensing
Display   High resolution colour display, illuminated
Functions   MEASURE, CALIBRATE, SWITCH-TEST, Min- and Max values, Tara, Min-/Max-Alarm, Filter, Zero set, PowerSafe
Storage capacity   16 units under test with each 32 pressure points
Interface   USB (for special cable)
Battery   Chargeable, Lithium-Ion (Charging time: approx. 8 h typ.)
Battery charger   110...230 VAC 50/60 Hz with EU-/US-/UK adapters
NOTE: the instrument cannot be operated during charging.
Electrical ports   Charging plug 9 V / 450 mA ±50 mA
PC-Kommunikation USB
4 mm measurement plugs for measurement of current, voltage, switch-test, powering unit under test
Case   NK-77M Harz
Dimension mm 387,4 x 304,8 x 177,8 mm
Weight kg aproxx. 7
Protection degree   Case closed: IP 67; Case open: IP 40

Pressure ranges

Pressure ranges of reference sensors LR-Cal LPC-S

Available standard pressure ranges of the reference sensors LR-Cal LPC-S
Accuracy ±0,025% v.E.

Pressure range [bar]   Type of pressure
Overload [bar] Burst pressure [bar]
0...0.25   gauge 1.6 2.4
0...0.4   gauge or absolute 2 2.4
0...0.6   gauge or absolute 4 4.8
0...1   gauge or absolute 5 6
0...1.6   gauge or absolute 10 12
0...2.5   gauge or absolute 10 12
0...4   gauge or absolute 17 20.5
0...6   gauge or absolute 35 40
0...10   gauge or absolute 35 42
0...16   gauge or absolute 80 96
0...25   gauge or absolute 80 96
0...40 to be used with manual pressure test pump gauge 80 96
0...60 to be used with manual pressure test pump gauge 120 550
0...100 to be used with manual pressure test pump gauge 200 800
0...160 to be used with manual pressure test pump gauge 320 1000
0...250 to be used with manual pressure test pump gauge 500 1200
0...400 to be used with manual pressure test pump gauge 800 1700
0...600 to be used with manual pressure test pump gauge 1200 2400
0...700 to be used with manual pressure test pump gauge 1200 2400
0...1000 to be used with manual pressure test pump gauge 1500 3000
-0,4...0   gauge 2 2.4
-0,6...0   gauge 4 4.8
-1...0   gauge 5 6
-0,25...+0,25   gauge 1.6 2.4
-0.4...+0.4   gauge 2 2.4
-0.6...+0.6   gauge 4 4.8
-1...+1.5   gauge 10 12
-1...+3   gauge 17 20.5
-1...+5   gauge 35 42
-1...+9   gauge 35 42
-1...+15   gauge 80 96
-1...+20   gauge 80 96
-1...+24 to be used with manual pressure test pump gauge 80 96
-1...+39 to be used with manual pressure test pump gauge 80 96

Calibrated at 23°C at vertical position (pressure port to the bottom), incl. linearity, hystersis and reproducability (1 year).

Delivery + Accessories

LR-Cal LPK 300-PP Scope of standard delivery + Accessories

Scope of standard delivery

Pressure calibration case LR-Cal LPK 300-PP  LR-Cal LPK 300-PP (geschlossener Druckkalibrier-Koffer)
Battery charger 110...230 VAC Steckerladegerät für LR-Cal LPK 300-PP Druckkalibrier-Koffer
Electrical connection cable for reference sensor LR-Cal LPC-S Referenzsensor-Anschlusskabel für LR-Cal LPK 300-PP Druckkalibrier-Koffer
Set of red/black test cables Prüfkabel-Set (rot/schwarz) für LR-Cal LPK 300-PP (und LR-Cal LPC 300)
Factory certificate of calibration for pressure, current and voltage, traceable
Operating manual

Optional accessories:

Order-Code: Description Image
starting with LPC-S- , depending on range Reference pressure sensor LR-Cal LPC-S
At least 1 pc. must be ordered separately, max. 10 sensors.
LR-Cal LPC-S Referenz-Drucksensor für LR-Cal LPK 300-PP (und LR-Cal LPC 300)
 LPK300-PP-ABSCHEIDER Strongly recommended if built-in electric pressure/vacuum pump is used:
Dirt trap
If the instrument is used with the reference sensor screwed into the case and the electric pump, only dry and clean gases may be used. To avoid a contamination (resultig in damage) of the electrical pump, the optional dirt trap is to be mounted between pressure port in the case and the unit under test.
By using this optional dirt trap, specifically developed for the LR-Cal LPK 300-PP, contamination of the integrated pump can be prevented.
As the dirt trap is fitted with a 1/8" BSP female thread, stainless steel threaded adapters to 1/2" BSP female, 1/4" BSP female, 1/2" NPT female and 1/4" NPT female, as well as 2 USIT gaskets are included in standard supply of this accessory.
Schmutzabscheider für den Prüflingsanschluss des LR-Cal LPK 300-PP Druckkalibrier-Koffers
LPK300-PP-ADAPTSET Set of threaded adapters for pressure port 1/2" BSP female for unit under test:
to 1/4" BSP female, 1/2" NPT female and 1/4" NPT female
LPK300-PP-DICHTSET Set of gaskets for pressure port 1/2" BSP female for unit under test:
4 x USIT gasket 1/2" BSP and 2 x USIT gasket 1/4" BSP
LPK300-PP-DAKKS DAkkS certificate of calibration (instead of factory certificate) for each reference pressure sensor LR-Cal LPC-S
LPC300-SW-USB Windows PC software LR-Cal LPC-Cal incl. USB interface cable.
Online calibration, download of stored calibration data, making certificates of calibration, etc.
Screenshot LPC-Cal Software für LR-Cal LPK 300-PP (und LR-Cal LPC 300)


Muster eines mit LPC-Cal erstellten Kalibrierzertifikats (mit Druckkalibrator LR-Cal LPC 300)LPC-Cal Windows-PC Software

After aquisition of calibration data with LR-Cal LPK 300-PP (in Calibration Mode), the calibration data can be downloaded with this optional Windows-PC software to a Laptop or PC. With MS-Excel the data can be saved or printed out in Calibration Certificate form. This form can be edited to be conform to users requirements (company logo, layout, etc.)

Select on the PC the calibration data (test items) to be transmitted and generate certificates of calibration with MS-Excel.

You can use all features of MS-Excel to adapt and configure the layout of the certificates to your requirements.


  • Windows-PC
  • Windows 98SE or Windows 2000 (SP4) or Windows XP or Windows 7
  • Keyboard and Mouse
  • SVGA colour monitor
  • Printer
  • COM-port or USB port
  • Installed software MS-Excel version 2000, XP, 2003, 2007 or 2010
    (does NOT work with version 2013)

Manual for PC-software LPC-Cal: see DOWNLOADs.

Also you need following accessory:

  • USB cable for LR-Cal LPK 300-PP


LR-Cal LPK 300-PP Datasheet + Operating manual

Datasheet and Manual can be downloaded as PDF files. To open PDF files, you need the ADOBE READER. You can get this software free of charge from ADOBE.

Software for Pressure Calibrator LR-Cal LPK 300-PP

  • Simple FREE OF CHARGE Windows-PC software (not supported!):
    An USB-cable, order-code LPC300-KAB-USB is required.
    Screenshot GRATIS-Software LPC300COM für Windows-PC und Druckkalibrator LR-Cal LPC 300
  • Windows-PC Software LR-Cal LPC-Cal  to be specified in order, if required; incl. USB cable:
    Information about LR-Cal LPC-Cal  here...
  • USB driver (latest version) for USB interface of LR-Cal LPC 300 to make a virtual COM-port on your Windows-PC:
    Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows 8, Windows 8.1:
    This drivaer makes a virtual COM-Port, used to communicate with your LR-Cal LPK 300-PP via USB port of your PC. This driver is needed for the above listet gratis software as well as for the optional LR-Cal LPC-Cal software, if the LR-Cal LPK 300-PP is connected to the PC via USB port. Furthermore, the cable with order-code LPC300-KAB-USB is required and must be ordered seperately.
    Manual for the USB driver (PDF): USB-driver-Win Manual.pdf

See also: LPP-KIT pressure calibration kits

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LR-Cal Leitenberger Kalibriersysteme
is a trade mark of
Leitenberger GmbH

for calibration equipment
Pressure & Temperature.