Absolute pressure decay leak tester K7890

pressurepneumaticfor automation

Overview
The K7890 is a dual-channel absolute decay air leak tester designed to test two parts simultaneously in a compact standard chassis. It targets industrial applications requiring parallel testing of paired or dual-chamber components and supports sectors such as automotive, medical, hydraulics, appliances, e‑mobility, aerospace and defense.

Main highlights

• Dual-channel architecture: two independent measurement channels in one unit for simultaneous testing of 2 parts
• Measurement range: −1 to 15 bar with multiple selectable scales
• Compact footprint identical to the single-channel model for easy integration
• 5.7" color TFT capacitive touchscreen with tempered glass front and backlit keyboard
• Dynamic LED bar for immediate process status visualization
• 300 configurable test programs and USB data logging

Application sectors

• Automation
• Automotive
• Medical
• Hydraulics / oleodynamic
• Home appliances
• E‑mobility
• Aerospace & Defense

Design and bi-channel performance
The K7890 embeds two independent channels in an ultra-compact housing, enabling parallel inspection of paired components (for example headlight pairs or dual-chamber parts) to halve cycle time while keeping pneumatic flexibility and test repeatability.

User interface and industrial robustness
Front tempered glass panel with 5.7" TFT capacitive touch interface (800x480 px) and backlit keyboard engineered for continuous production cycles. Dynamic LED bar provides quick visual feedback of process states.

Pneumatic configuration and measurement
Measurement capability from −1 to 15 bar. Two regulation modes: high-precision manual regulator (standard) or automatic electronic regulator (option). Includes dedicated Stäubli® fitting for connecting calibrated leaks for periodic verification.

Connectivity and Industry 4.0
Standard interfaces: RS232 (x2), RS485, USB master/slave; Ethernet and industrial fieldbus protocols available as options (Modbus RTU, Profinet, EtherNet/IP, EtherCAT). Wireless modules: Bluetooth Low Energy (standard) and optional Wi‑Fi. Designed for PLC/SCADA/MES interoperability.

Accessories

• External discharge solenoid valve with filter
• External start button
• External start/abort push-button panel
• External 4-program selection push-button panel
• Start foot pedal
• Barcode reader
• Adhesive label roll for printer (4,500 pcs)
• AUX signal extension cable
• Venturi
• Air filter
• Stäubli® male connector
• Precision micrometric valve
• Micrometric valve
• PC Software K-Series Manager

Optionals

• Internal discharge valve
• Front precision pressure regulator (STANDARD)
• Electronic pressure regulator
• I/O expansion board 24 Vdc
• Two-hand safety logic start input
• Ethernet/TCP-IP port
• EtherNet/IP port
• EtherCAT port
• Profinet port
• Active USB port (STANDARD)
• Bluetooth Low Energy interface (STANDARD)
• Wi‑Fi connection
• High resolution measurement (1M pts AD) (STANDARD)

Technical Data (summary)
Model | 0-1bar | 1-2bar | 2-6bar | 6-10bar | 10-15bar
Accuracy Dp | 0,5% RDG+3DGT | 0,5% RDG+3DGT | 0,5% RDG+3DGT | 0,5% RDG+3DGT | 0,5% RDG+3DGT
Range of measurements Dp | 0-65 mbar | 0-65 mbar | 0-65 mbar | 0-650 mbar | 0-650 mbar
Resolution Dp | 0,001 mbar | 0,002 mbar | 0,005 mbar | 0,01 mbar | 0,1 mbar
Direct pressure accuracy | 0,5%FS (all ranges)
Direct pressure measurement range | 0-FS (all ranges)
Direct pressure resolution | 0,1 mbar (up to 6 bar) ; 1 mbar (higher ranges)
Accuracy measuring loss in cc/min | 1%RDG+0,03 cc/min (all ranges)
Measurement range in cc/min | 0-10 cc/min (all ranges)
Measured measurement resolution in cc/min | 0,01 cc/min (all ranges)
Accuracy measure volume in cc | 1%RDG+2 cc/min (applicable ranges)
Volume range in cc | 0-500 cc (applicable ranges)
Volume measurement resolution in cc | 0,1 cc
Measure unit | mbar, bar, psi, mmHg, mmH2O, Pa, hPa, cc/min, cc/h, pressure/s
Dimensions | L: 220 mm, H: 140 mm, D: 250 mm
Weight | 4 kg
Display size | 5.7" (800 x 480 px)
Operating temperature range | 5 - 40 °C
RS232 ports | 2
RS485 ports | 1
"Master" USB port | 1
"Slave" USB port | 1
Ethernet port | Optional (supports ForTest protocols, Modbus RTU, Profinet, EtherCAT, EtherNet/IP)
I/O signals | Start, Stop, Filling, Test, Good, Reject, 4BCD
Auxiliaries | 8 programmable outputs, 4 programmable inputs, 4BCD
Number of programs | 300
Test archive memory | Advanced
Password block | Yes
Program name | Yes, up to 16 characters
Notes & Normatives | Resolution for uncertainty calculation: 1 Pa up to 10 bar. Flow measurement is volumetric; mass-type flowmeter values are referenced to 0°C - 1013.25 mbar. Accuracy data are guaranteed under laboratory calibration conditions. Reference Normatives: EN 61010-1; EN61326-1 / EN61326/A1; EN61000 series; EN1779.

Technical specifications

• Model: K7890 (dual-channel absolute decay air leak tester)
• Measurement ranges: −1 to 15 bar (selectable scales)
• Pressure resolution: down to 0,001 mbar depending on scale
• Leak measurement: 0–10 cc/min, resolution 0,01 cc/min
• Volume measurement: 0–500 cc, resolution 0,1 cc
• Accuracy (differential): 0,5% RDG + 3 DGT; direct pressure 0,5% FS
• Interfaces: RS232 (2), RS485 (1), USB master (1), USB slave (1), Ethernet (optional), Bluetooth, Wi‑Fi
• I/O: Start/Stop/Filling/Test/Good/Reject/4BCD; 8 outputs programmable; 4 inputs programmable
• Programs: 300 configurables; advanced test archive
• Dimensions: 220 × 140 × 250 mm; Weight: 4 kg
• Display: 5.7" color TFT capacitive touch, tempered glass front
• Operating temperature: 5–40 °C
• Standards: listed EN references