Panran’s PR7XX Series Precision Digital Thermometer Guide

PR710 vs PR721/PR722: Quick Comparison 

Which Panran thermometer should I buy? 

• Choose PR710 if you want a handheld precision thermometer with Pt100 and very long runtime for routine checks. 

• Choose PR721/PR722 if you need modular probes (PRT/thermocouple/humidity), app connectivity (Bluetooth/ZigBee), IP64, U-disk data export, or explosion-proof capability. 

How Precision Thermometers Work 

PRT (Pt100) thermometers measure resistance change in a platinum element; they offer the best stability and low drift. Thermocouples (TCs) generate a small voltage from two dissimilar metals; they cover wider ranges (up to ~1300 °C with Type S/N on PR7XX) but require cold-junction compensation at the readout.  

The meter linearises inputs (ITS-90 tables or polynomials), applies calibration coefficients, and outputs temperature with a set resolution (e.g., 0.001 °C). On PR7XX, the reference junction compensation for TCs is specified and contributes to uncertainty.  

Choosing the Right Probe & Sensor 

Match the probe to your range, accuracy target, environment, and connectivity: 

• Range: cryogenic/freezer work (down to –80/–200 °C) → PRTs; high-temp process checks (to ~800–1300 °C) → TCs. On PR721/PR722, the intelligent sensor range spans –200…1300 °C depending on module.  

• Accuracy: for tight tolerances, use wire-wound Pt100 PRT probes; for mapping and high-temp verification, TCs are practical. 

• Environment & IP: wet or dusty sites need IP64 on PR721/PR722.  

• Explosion-risk: select CNEx-certified PR721/PR722 configurations.  

• Data & app: prefer Bluetooth/ZigBee for live sync and U-disk for quick exports. cspanran.com 

Australian Requirements & Good Practice 

Food & Beverage (HACCP/FSANZ): Keep potentially hazardous foods at ≤ 5 °C or ≥ 60 °C; the “danger zone” is 5–60 °C. Use the 2-hour/4-hour rule when food must be outside control during prep or display.  

GMP (TGA/PIC/S): Manufacturers must maintain controlled processes, equipment calibration and qualification, and documented records aligned to the PIC/S Guide to GMP adopted in Australia (Version 16 in 2024, moving to Version 17 in 2025). Temperature control and documented calibration are routine compliance expectations.  

NATA guidance (selection of references): A reference thermometer’s uncertainty should be ≤ 1/5 of the uncertainty required for the working thermometer—practical for setting targets during validation and calibration planning.  

Calibration & Traceability in Australia 

CISCAL is NATA-accredited (Accreditation No. 411) to ISO/IEC 17025 and performs digital thermometer calibration from –80 °C to 1100 °C, as well as verification of controlled temperature enclosures (e.g., ovens, furnaces, incubators, baths, freezers) with AS 2853 references where applicable. Expanded uncertainty (≈95% confidence) is reported on certificates, together with traceability.  

How often to calibrate? 

• Baseline: annually for most lab and QA uses. 

• GMP critical control / release: 6–12 months depending on risk, load, and audit history. 

• Harsh use (high-temp cycling, shocks): shorten intervals (e.g., quarterly).  

These intervals align with risk-based GMP expectations under the PIC/S Guide.  

How We Calibrate PR7XX (method snapshot) 

• Sources: dry-well calibrators for field checks and stirred liquid baths for best stability at low/medium temps. 

• References: reference readout (e.g., PR722B) with calibrated PRT thermometer; ambient temperature/humidity tracking; comparison and electrical input checks where required. 

• Reporting: results with expanded uncertainty, traceability, and digital certificates issued via the CIS CAL SMART portal. 

• Coverage: field service hubs in NSW, VIC, QLD with national reach. 

  
  

   

Setup, Logging & Connectivity (PR7XX) 

• Wireless: PR721/PR722 supports Bluetooth or ZigBee for app sync; U-disk mode (micro-USB) for mass storage and quick data copy. PR710 can form a 2.4 G wireless link to a PC dongle for multi-unit monitoring.  

• Best-practice logging: for temperature stability checks, log at 1–5 s; for routine trending, 30–60 s balances data volume and insight. For food safety, ensure logs prove time outside control comply with 2-hour/4-hour guidance. 

Buying Checklist 

• Accuracy class and uncertainty target (remember the 1/5 rule for references).  

• Sensor compatibility: Pt100/PRT thermometer, thermocouple thermometer, humidity.  

• Ingress protection/IP rating: need IP64 thermometer?  

• Explosion-proof requirement (CNEx).  

• Data logging capacity and U-disk data export.  

• Connectivity: Bluetooth/ZigBee.  

• Battery/runtime: AAA vs rechargeable.  

• Calibration on delivery: request ISO/IEC 17025 NATA-traceable certificates.  

• Warranty & service: confirm local NATA-accredited support and national coverage. 

Panran Equipment Used in Calibration 

Getting the Most Value from Your CISCAL services 

Why CISCAL for PR7XX? We combine supply, probes, and NATA-traceable calibration with digital certificates via the CIS CAL SMART portal—ideal for GMP temperature mapping, HACCP verification, and laboratory QA. Our accredited scope covers –80 °C to 1100 °C for digital thermometers and temperature enclosures verification against AS 2853 where applicable, backed by Accreditation No. 411 and national coverage from NSW/VIC/QLD hubs.  

Get NATA-traceable calibration & supply in Australia. CISCAL has 60+ years of ISO/IEC 17025 accreditation (No. 411) with national coverage. We calibrate PR7XX systems, supply probes, and issue digital certs via the CIS CAL SMART portal.

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