Compact | Digital Reading | °F & °C | 17 T/C Types | Pre-Mounted Type K Jacks | 6 ft Power Cord | Carrying CaseSKU: 22008C

Overview

The Chino AH-4000 12-Point Hybrid Digital Chart Recorder is a compact, versatile, and field-proven temperature recording solution trusted across the industrial heat treatment, PWHT, welding, and process industries. Combining the reliability of a traditional strip chart recorder with the convenience and precision of a modern digital display and data logging system, the AH-4000 delivers a complete, permanent, and code-compliant temperature record across up to 12 independent thermocouple channels simultaneously.

Supplied complete with pre-mounted Type K thermocouple jacks, a 6-foot power cord, and a protective carrying case, this unit is ready to deploy immediately — making it the ideal standalone recorder for field heat treatment operations, weld procedure qualification testing, quality control documentation, and any application requiring traceable multi-channel temperature records.

What's Included

Box Dimensions & Shipping Weight (Estimated)

Key Specifications

Hybrid Recording — The Best of Both Worlds

The AH-4000 is a true hybrid recorder — meaning it records simultaneously to both the physical strip chart paper and to a digital SD card. This dual recording capability provides two independent, complementary records of every heat treatment or measurement cycle:

• Strip chart — a continuous, ink-on-paper temperature trace that is immediately readable without any software or equipment, universally accepted for code compliance and quality documentation, and resistant to data loss from power failures or digital media failure
• SD card digital record — a precise, time-stamped digital dataset that can be transferred to a PC for analysis, archiving, report generation, and long-term storage using Chino's compatible data acquisition and analysis software

Together, these two records provide the redundancy, traceability, and flexibility that demanding industrial and quality assurance applications require.

Multi-Channel Temperature Monitoring

With 12 independent input channels, the AH-4000 can simultaneously monitor and record up to 12 thermocouple or RTD sensors — covering all zones of a multi-zone heat treatment setup, a complex weld joint with multiple thermocouple attachment points, or a process vessel with distributed temperature monitoring requirements.

The large rotating digital display cycles continuously through all active channels — displaying each zone's current temperature in large, easy-to-read digits so the operator always has a clear view of the full thermal picture without needing to scroll or switch screens manually.

17 Thermocouple Types — Broad Compatibility

This configuration of the AH-4000 is pre-configured to accept 17 thermocouple types — covering virtually every thermocouple type encountered in industrial heat treatment, PWHT, weld testing, and process monitoring applications. The pre-mounted Type K jacks are the most widely used thermocouple type in field heat treatment operations, ensuring immediate compatibility with standard Type K thermocouples without any additional wiring or adapters.

Supported thermocouple types include: K, E, J, T, R, S, B, N, U, L, W-WRe26, WRe5-WRe26, PtRh40-PtRh20, NiMo-Ni, CR-AuFe, Platinel, and Au/Pt.

Alarm & Chart Management

• 4 alarm types per input channel — high, low, rate-of-change, and deviation alarms can be independently configured for each of the 12 channels
• Visual alarm indication — when any alarm triggers, the LCD display flashes "ALM" and the associated measured value flashes to immediately alert the operator
• Chart end detection — the recorder automatically triggers an alarm when the chart paper supply is running low, preventing unrecorded data gaps during extended heat treatment cycles
• Simultaneous print options — the recorder can print periodic data records, alarm event logs, and setting data lists directly to the chart for a fully self-contained paper audit trail

Data Management & Connectivity

• USB port — direct PC connection for data download and software communication (standard)
• SD card slot — on-board data logging to SD card for portable data transfer (SD card sold separately)
• Optional communication interfaces — RS232C, RS422A, RS485, and Ethernet available as factory options
• Ethernet option — enables remote monitoring of live readings via PC web browser, remote parameter configuration, and automatic email alarm notifications
• Compatible software — data acquisition software for replay, waveform processing, editing, and trend display; parameter setting software for PC-based configuration management

Compliance & Applications

The Chino AH-4000 recorder produces temperature records suitable for compliance with the following codes and standards:

• ASME Boiler & Pressure Vessel Code — Section I, VIII, and IX
• AWS D1.1 — Structural Welding Code
• API 1104 — Welding of Pipelines and Related Facilities
• ASME B31.1 / B31.3 — Power Piping / Process Piping
• NACE MR0175 / ISO 15156 — PWHT documentation for sour service
• AMS 2750 — Pyrometry requirements for aerospace heat treatment

Ideal Applications

• Post-weld heat treatment (PWHT) temperature recording and documentation
• Weld procedure qualification testing — thermocouple data recording
• Field and shop heat treatment quality control
• Pressure vessel and boiler fabrication inspection documentation
• Process temperature monitoring in industrial plant environments
• Laboratory and R&D multi-channel temperature data acquisition
• Any application requiring a permanent, traceable, multi-channel temperature record

About Chino Corporation

Chino Corporation is a globally recognized Japanese manufacturer of precision temperature measurement and recording instruments, with a history spanning over 80 years. Chino recorders are trusted by heat treatment contractors, pressure vessel fabricators, aerospace manufacturers, and process industries worldwide for their accuracy, durability, and compliance with the most demanding international quality standards.