Anritsu Meter AP-400/450 Handheld Temperature Meter with Thermal Printer

Overview

The Anritsu Meter AP-400 and AP-450 are portable, battery-powered handheld temperature meters engineered for field-deployed thermal verification, process validation, and quality control tasks requiring immediate traceable documentation. Both models integrate a built-in thermal line printer—eliminating dependency on external devices or post-processing software—and employ precision thermocouple signal conditioning in accordance with international thermoelectric standards. The AP-400 accepts fixed E- or K-type thermocouples via its single-input ANP connector, while the AP-450 expands flexibility with switchable support for E, K, J, T, and R types—enabling cross-material compatibility across metallurgical, food safety, HVAC, and laboratory applications. Measurements adhere to the IEC 60584-1:2013 standard for thermocouple EMF characterization, with digital linearization applied in real time. The instrument operates within a defined environmental envelope (0–40 °C, ≤80% RH non-condensing), ensuring metrological stability during on-site audits, equipment commissioning, or routine calibration checks.

Key Features

• Integrated thermal printer with 2.5 mm character height and 37 mm wide paper—supports on-the-spot generation of time-stamped, auditable measurement records without connectivity.
• Real-time absolute timestamping (HH:MM:SS) and sequential numbering for unambiguous data lineage and GLP/GMP-compliant recordkeeping.
• Three printing modes: manual (press PRINT), interval-based (eight preset intervals from 3 sec to 60 min), and batch print of up to 100 stored readings.
• Dual-resolution operation: automatic switching between 0.1 °C (high-precision range) and 1 °C (extended-range mode) based on measured value.
• Reference junction compensation accuracy of ±0.2 °C at 25 ±10 °C, with temperature coefficient of ±0.01% of full scale per °C outside that band.
• Robust mechanical design: compact form factor (~68 × 201 × 42 mm), lightweight (~350 g with batteries), and IP-rated enclosure suitable for industrial environments.
• Long-duration operation: up to 120 hours on four AA alkaline cells under low-frequency sampling (1/min, no print); optional AC adapters available for benchtop or continuous use.

Sample Compatibility & Compliance

The AP-400/450 supports direct connection of industry-standard thermocouples—E, K, J, T, and R types—with input impedance <500 Ω to minimize loading error. Each thermocouple type is validated against ITS-90 reference tables per IEC 60584-1:2013. The device meets general-purpose electrical safety requirements for portable instrumentation (IEC 61010-1). While not certified for hazardous locations, its operating environment specification (0–40 °C, non-condensing humidity) aligns with ISO/IEC 17025 clause 5.3.2 for controlled field measurement conditions. Calibration reports provided with each unit include as-received verification data traceable to national standards, supporting compliance with FDA 21 CFR Part 11 when used in conjunction with documented procedures and audit trails.

Software & Data Management

No proprietary software or PC interface is required—the AP-400/450 operates as a self-contained data acquisition and reporting system. All recorded measurements—including timestamp, thermocouple type, unit, and numeric value—are stored in non-volatile memory with power-fail protection. The internal lithium backup cell maintains real-time clock integrity during battery replacement. Batch printing retrieves all 100 entries in chronological order with header identification (model, serial number, date/time of print). Thermal paper rolls (ACAP4, 1000-line capacity) comply with ISO 11799 for archival stability under ambient storage. For regulated environments, users may implement supplementary SOPs governing paper retention, manual annotation, and periodic verification against NIST-traceable references.

Applications

• Validation of sterilization cycles (autoclaves, ovens, tunnel kilns) per ISO 17665 and EN 285.
• Temperature mapping of cold-chain logistics units, refrigerated trucks, and pharmaceutical storage rooms.
• In-process monitoring of heat treatment furnaces, soldering stations, and extrusion dies where rapid feedback and printed evidence are mandated.
• Field verification of HVAC sensor outputs and duct temperature uniformity per ASHRAE Guideline 1.
• Calibration lab support for thermocouple probe verification prior to formal calibration—reducing turnaround time for secondary standards.
• Educational labs requiring student-accessible, low-cost, self-documenting thermal instrumentation with minimal training overhead.

FAQ

Does the AP-400/450 support thermocouple calibration adjustment or offset correction?
No—this instrument performs direct thermocouple voltage-to-temperature conversion using factory-loaded coefficients per IEC 60584-1:2013. It does not offer user-adjustable calibration offsets or channel-specific corrections.
Can the thermal paper be replaced with third-party rolls?
Only ACAP4-compatible 37 mm wide thermal paper is guaranteed to function reliably; non-certified media may cause feed errors, smudging, or premature ribbon wear.
Is the internal memory retained after battery replacement?
Yes—data and clock settings are preserved by the integrated lithium backup cell, which maintains RTC functionality for up to 5 years under typical usage.
What is the maximum allowable source resistance for connected thermocouples?
The input circuit is designed for thermocouple sources with total loop resistance ≤500 Ω, including probe wire, connectors, and extension cable.
Does the device meet FDA 21 CFR Part 11 requirements for electronic records?
While the hardware supports ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate), full Part 11 compliance requires procedural controls—including operator training, access logs, and paper archive policies—implemented by the end user.