Chino AH4000 — 24-Point Hybrid Digital Chart Recorder

Unit Only — No Case | No Pre-Wired T/C Jack PanelSKU: AH4000

Overview

The Chino AH4000 24-Point Hybrid Digital Chart Recorder is the highest-capacity configuration in the trusted AH4000 series — a professional-grade, multi-channel temperature recording solution purpose-built for large-scale industrial heat treatment, post-weld heat treatment (PWHT), process monitoring, and quality assurance applications where the maximum number of simultaneous temperature channels is required.

With 24 independent recording channels, this unit is capable of monitoring and documenting the complete thermal profile of the most complex multi-zone heat treatment setups, large pressure vessel fabrications, pipeline girth weld arrays, and multi-point process installations — all simultaneously, on a single instrument. This listing is for the recorder unit only, supplied without a carrying case and without a pre-wired Type K thermocouple jack panel, making it the ideal choice for integration into existing power consoles, custom control enclosures, or installations where the operator supplies their own thermocouple connection arrangement.

What's Included

Box Dimensions & Shipping Weight (Estimated)

Key Specifications

24-Point Capacity — Maximum Zone Coverage

The 24-point configuration of the AH4000 is the definitive choice for the most demanding heat treatment and process monitoring applications — offering double the channel capacity of the 12-point model and four times the capacity of the 6-point model. With 24 independent recording channels, a single AH4000 unit can cover:

• A full 6-way power console with 4 thermocouple inputs per circuit (6 circuits × 4 T/C = 24 points)
• Large pressure vessel fabrications with distributed thermocouple arrays across multiple weld seams and heat zones
• Multi-spool pipeline heat treatment operations with numerous individual monitoring locations
• Complex structural steel PWHT setups requiring dense thermocouple coverage for uniform temperature verification

Hybrid Recording — Simultaneous Chart and Digital

The AH4000 is a true hybrid recorder — recording simultaneously to both the physical strip chart and to a digital SD card, providing two independent and complementary records of every heat treatment 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.

Unit Only Configuration — Integration Ready

This listing supplies the AH4000 24-point recorder as a standalone unit without a carrying case or pre-wired Type K thermocouple jack panel. This configuration is ideal for:

• Console integration — mounting directly into a Hotfoil-EHS or custom power console enclosure where the recorder sits permanently in the console lid support system
• Custom installations — where the operator or fabricator supplies their own thermocouple connection panel, terminal blocks, or miniature T/C connectors suited to the specific installation
• Replacement units — replacing an existing recorder in a console or enclosure where the original case and wiring are already in place
• OEM and system builders — integrating the AH4000 into a larger custom heat treatment or process monitoring system

Alarm & Chart Management

• 4 alarm types per input channel — high, low, rate-of-change, and deviation alarms independently configurable for each of the 24 channels
• Visual alarm indication — LCD display flashes "ALM" and the associated measured value flashes when any alarm triggers
• Chart end detection — automatic alarm when chart paper supply runs low, preventing unrecorded data gaps during extended heat treatment cycles
• Simultaneous print options — periodic data records, alarm event logs, and setting data lists can be printed directly to 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; up to 2 GB)
• 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
• Data Acquisition Software — acquire, replay, process, and trend data from PC
• Parameter Setting Software — manage all recorder settings from PC via USB or optional communication interface

Compliance & Standards

The Chino AH4000 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

• Large-scale post-weld heat treatment (PWHT) with 24 or more thermocouple monitoring points
• Multi-zone pressure vessel and boiler fabrication heat treatment documentation
• Pipeline girth weld heat treatment with dense thermocouple arrays
• Integration into Hotfoil-EHS or custom 6-way, 9-way, or 12-way power consoles
• Process temperature monitoring in industrial plant environments requiring high channel counts
• Laboratory and R&D multi-channel temperature data acquisition
• Any application requiring a permanent, traceable, 24-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.