Humidity generator with calibration system 5128A

portablecalibration

Overview
The Fluke Calibration 5128A RHapid-Cal® Humidity Generator is a portable, mixed-flow humidity generator designed for rapid, multi-point calibration of humidity probes, transmitters and loggers in laboratory and on-site environments. It ships with an ISO 17025 accredited system calibration and supports high-throughput calibration workflows where reliable humidity control is required.

Key features

• System accuracy: ±1.0 % RH (7 %–80 % RH, 18 °C–28 °C), with specified range above 80 % RH.
• Fast humidity and temperature stabilization for high calibration throughput (typical rates: +10 °C/min temperature rise, −1.5 °C/min fall; +10 % RH/min humidity rise, −5 % RH/min fall).
• Supports on-site multi-point calibration via a 5-port chamber to accommodate multiple probes simultaneously.
• Compact, lightweight design for easy transport and field use.
• ISO 17025 accredited system calibration included as standard.
• Easy maintenance: front-load desiccant cartridge and refillable distilled water reservoir.

Applications and usage
The 5128A is intended for corporate and independent calibration laboratories, production quality teams and field service technicians in sectors such as pharmaceuticals, medical devices, semiconductors, chemicals and food production. It enables more representative multi-point calibrations compared with one-point spot checks and reduces overall calibration time per device.

Standard contents (examples)

• Square chamber door with 5 ports
• Desiccant cartridge
• Filling syringe with extension tubing
• Grommets (1/4", 3/8", 1/2", 3/4", 7/8")
• 2 m power cord
• ISO 17025 accredited system calibration certificate

Key advantages
Clearly specified system accuracy for traceable calibrations, rapid stabilization to increase throughput, portability for field calibration, flexible chamber configuration to handle varied sensor form factors, and included accredited calibration to simplify compliance and traceability.

Technical specifications (selected)

• System accuracy: ±1.0 % RH (7 %–80 % RH, 18 °C–28 °C); ±1.25 % RH above 80 % RH per product specification.
• Humidity display/data resolution: 0.1 % RH; temperature display/data resolution: 0.1 °C.
• Chamber performance (18–28 °C, 7 % setting): temperature uniformity ±0.12 °C; humidity uniformity ±0.3 % RH; humidity stability ±0.15 % RH; temperature stability ±0.05 °C.
• Operating humidity range (18–28 °C): up to 80 % RH (higher ranges specified).
• Power: 100 V–240 V AC ±10 %, 47–63 Hz; consumption 300 VA.
• Transducer output: 12 V DC, 1 A max; fuse F1A 250 V fast.
• Interfaces: USB for data export.
• Dimensions (chassis): 237 mm × 432 mm × 521 mm; weight (chassis only): 15 kg.
• Work volume (indicative): 109 mm × 125 mm (depth × diameter); chamber total depth 200 mm × diameter 150 mm.
• Required test fluid: distilled water.
• Safety and EMC: IEC 61010-1, IEC 61326-1 / CISPR 11 and regional approvals as specified.

Maintenance and support
Replaceable desiccant cartridge accessible from the front panel, refill with distilled water only, simple operational routines and global support options from Fluke Calibration, authorized channel partners and service centers.