Panran PR235 Multi-Function Calibrator: Your All-In-One Calibration Solution

Panran PR235: One-Stop Multi-Function Calibrator 

If your week swings from checking RTDs to trimming 4–20 mA transmitters and chasing intermittent loop noise, carrying three different tools isn’t helping. The Panran PR235 multi-function calibrator packs electrical, temperature and frequency work into one handheld, with a phone-like touchscreen, glove-friendly keys, and 300 V port protection that can survive wiring mix-ups on site.

Key Features Overview 

• Measure & source the lot: DC voltage/current, resistance (2/3/4-wire), frequency; plus 11 TC types and 11 RTD types for both measurement and output.  

• Built-in isolated LOOP power: Drive and test transmitters without a benchtop supply.  

• 300 V mis-connection tolerance: Both measure and source ports are protected, reducing hardware damage risk.  

• Touchscreen + keys + flashlight: A 4.0″, 720×720 screen, physical keys, and a light for tight panels and low-light areas.  

Smart Design & Ease of Use 

An embedded intelligent OS supports swipe/tap and quick text entry. Mechanical keys keep you accurate with gloves on. There are also a built-in flashlight and a help screen, screenshots, and firmware upgrade options. Useful quality-of-life touches for field work.  

Reference Junctions Made Simple 

Choose built-in, external, or custom. In external mode, the PR235 auto-matches an intelligent tellurium-copper reference junction with a corrected internal sensor for more reliable TC compensation. The clamp design grips wires/nuts securely for stable readings.  

Deep Dive: Measurement & Output Capabilities 

Smarter measurements: Auto-range helps avoid wrong scale errors; when measuring resistance or RTDs, the unit auto-recognises 2-, 3-, or 4-wire connections, saving time and mistakes.  

Flexible outputs: Manual/auto ramp, step, and sine patterns are built in; set periods and step lengths for controller testing, alarm checks, and loop characterisation.  

Measurement toolbox: Convert between electrical and temperature values for RTD/TC on the fly, and swap units across 20+ physical quantities, handy when plant documentation mixes °C, K, and °F or when converting pressure/flow units.  

Representative ranges & accuracy (examples): 

• Voltage (measure): up to 50.0000 V, resolution down to 0.1 mV, accuracy as tight as 0.015% RD + 0.002 V (range-dependent).  

• Current (measure): to 50.0000 mA with 0.1 μA resolution, 0.015% RD + 0.003 mA.  

• RTD/Resistance: supports 2/3/4-wire with fine resolution (e.g., 0.1 mΩ in the 100 Ω range).  

• Loop tasks: integrated LOOP power keeps 4–20 mA work compact and tidy.  

Advanced Functions & Modules 

Live curve display & logging: Use PR235 as a mini-recorder to plot readings in real time, then review min, max, average, and standard deviation to confirm stability or uncover drift.  

Task workflows (PR235A/B): Pre-built templates for temperature transmitters, switches, and panel instruments guide steps, auto-determine error, and let you export the process and results. Ideal for defensible records.  

HART on board (PR235A): Communicate with HART transmitters using the built-in 250 Ω resistor and LOOP power then set or adjust device parameters.  

Plug-in expansion (PR235A/B): Add PR9110 pressure and T&H modules. The calibrator auto-recognises the module and opens a three-screen mode so your core measure/source functions remain available.  

Pressure choices (PR9110): From −100 kPa up to 100 MPa across gauge and compound ranges, with 0.05/0.1 classes for gas or liquid. Great coverage for pneumatic lines through to high-pressure hydraulics.  

Real-World Workflows (Step-by-Step) 

1. 4–20 mA temperature transmitter (HART) — PR235A 

• Connect PR235 mA measure leads in series with the loop; enable LOOP power.  

• Launch HART; auto-handshake via the 250 Ω internal resistor; read tag/range.  

• Source a step or ramp temperature (RTD/TC) and record transmitter output; log to the curve display for traceable data.  

• Save/export task results for QA records (Models A/B).  

2. Temperature switch check 

Use resistance/RTD auto-recognition to wire quickly; apply a sine or step output around the trip point; capture actuation/reset values with curve logging and statistics to confirm hysteresis.  

3. Loop noise or drift investigation 

Set PR235 to frequency or mA monitor; use curve logging to capture intermittent spikes; inspect min/max/σ. If a wiring slip occurs during probing, 300 V protection reduces the chance of killing the calibrator. 

Safety & Reliability (What Reduces Risk) 

• 300 V protection on measure and source ports with alarm/fuse response to overloads.  

• Replace only the supplied fuses to maintain protection.  

• Don’t verify while charging; performance may drop.  

• Some measure/output modes are mutually exclusive; the UI greys them out to prevent misuse.  

• Respect environment limits (5–35 °C, non-condensing).  

Technical Specifications (Quick Read) 

• Size/weight: 200 × 110 × 55 mm, 790 g.  

• Display: 4.0″ industrial touchscreen, 720×720.  

• Battery: 11.1 V / 2800 mAh, ≥13 h continuous.  

• Ingress/build: IP63, tellurium-copper terminals, TF card storage.  

• Calibration cycle: 1 year.  

Model Picker: PR235A vs PR235B vs PR235C

Why It Matters (for Manufacturing, Pharma, Food & Beverage) 

• Faster jobs: Auto-range, wiring recognition, tasks, and logging shave minutes off k check across transmitters, switches, and indicators.  

• Fewer tools: A portable calibrator that covers electrical/temperature and HART communication means lighter bags and simpler callouts.  

• Lower risk: Over-voltage protection helps avoid costly damage when panels mix strong/weak circuits.  

• Scales with you: Add pressure or humidity modules as needed; the PR235 detects them and keeps your main functions ready.  

Comparison Snippet / Alternatives 

Many multi-function calibrators need an external HART modem or separate loop supply. The PR235A builds both in, so you can read tags, set ranges and run trims straight from the handheld. Its 300 V port protection is another stand-out for mixed-panel work.  

Getting the Most Value from Your CISCAL Services 

Pair your Panran PR235 multi-function calibrator with a planned calibration program and clear records. Use the device’s task exports and curve logs to support audit trails and maintenance decisions, and keep to the annual calibration interval noted in the specs.  

Ready to streamline field calibration? Contact us today to learn how the Panran PR235 can improve your calibration process or schedule a demo to see its advanced features in action. 

FAQs