500T-115VAC – VAS ENGINEERING – DORIC 500 SERIES DIGITAL TEMP INDICATOR
500T-115VAC – VAS ENGINEERING – DORIC 500 SERIES DIGITAL TEMP INDICATOR
The VAS Engineering Doric 500 Series (Model: 500T-115VAC) is a highly reliable, industrial-grade Digital Temperature Indicator engineered for precision temperature monitoring in rugged process environments.
Operating on a standard 115V AC power supply, this legacy-backed instrument provides highly accurate, real-time readouts from thermocouple or RTD sensors.
Known for its excellent noise rejection and robust build, the 500T-115VAC serves as a critical panel-mounted monitor in manufacturing lines, laboratories, and heavy industrial plants.
It converts low-voltage sensor signals into an easily scannable digital display, minimizing parallax errors and ensuring that operators can maintain strict thermal control over vital process loops.
Technical Parameter Table
| Parameter | Specifications |
| Brand / Manufacturer | VAS Engineering (Doric Scientific Series) |
| Model / Ordering Code | 500T-115VAC |
| Series | Doric 500 Series |
| Product Type | Digital Temperature Indicator / Panel Meter |
| Input Voltage | 115V AC ($\pm 10\%$), 50/60 Hz |
| Sensor Input Compatibility | Thermocouples (Type J, K, T, E, R, S, B) / RTD (Pt100) Model dependent |
| Display Type | High-visibility LED digital display |
| Measurement Resolution | 1° or 0.1° (Selectable configuration) |
| Mounting Configuration | Panel Mount (Standard DIN cutout profile) |
| Operating Temperature | 0°C to +50°C |
| Enclosure Protection | Front panel sealed against dust and splash |
Product Advantages and Features
Legacy Industrial Reliability: Time-tested design trusted across the process industry for long-term operational stability and calibration retention.
High-Contrast Digital Display: Offers crystal-clear temperature readouts from across the plant floor, eliminating the guesswork of analog dial meters.
Exceptional Noise Rejection: Built with advanced input filtering to block heavy electromagnetic interference (EMI) caused by surrounding motors and heavy switchgear.
Rugged Enclosure Architecture: Housed in a durable casing designed to slip directly into standard control room panels and withstand industrial vibrations.
Straightforward 115V AC Powering: Eliminates the need for external DC step-down transformers, piping line power directly into the rear terminals.
Application Cases
Industrial Heat-Treating Furnaces: Provides independent, high-visibility monitoring of thermal zones in metal and ceramic processing ovens.
Chemical and Petrochemical Processing: Used as a localized safety readout for pipeline temperatures, distillation columns, and storage tanks.
Food Processing and Pasteurized Lines: Monitors strict processing temperatures inside bulk ingredient vats and industrial baking lines.
HVAC and Boiler Monitoring: Installed directly into building automation panels to monitor main steam line and boiler exhaust temperatures.
Related Models & Other Models in the Same Series
The Doric 500 series encompasses various power options, display ranges, and sensor configurations tailored to different instrumentation loops:
500T-115VAC: Digital Temperature Indicator, 115V AC Input (Current Model)
500T-230VAC: Digital Temperature Indicator, 230V AC Input (for European/International power grids)
500T-24VDC: Low-Voltage Auxiliary Panel Model
510 Series: Digital Process Indicators with scaled linear voltage/current inputs (e.g., 4-20mA monitoring)
520 Series: Dual-input differential temperature indicators
Installation and Maintenance
Installation Guidelines
Panel Cutout Prep: Prepare a standard rectangular panel cutout corresponding to the unit’s frame dimensions. Ensure the mounting surfaces are smooth and clean.
De-Energize Power Lines: Ensure the 115V AC line power supply is fully locked out and tagged out prior to making any terminal connections at the rear of the device.
Sensor Separation: Route your thermocouple or RTD signal wires away from high-voltage AC lines to prevent magnetic coupling and reading fluctuations.
Secure Mounting: Slide the indicator through the front panel cutout and lock it into place using the provided rear mounting brackets/screws. Do not over-torque.
Routine Maintenance and Calibration
Front Panel De-dusting: Periodically wipe down the front display lens with a soft, dry, anti-static cloth to remove grease and ambient factory dust.
Terminal Audits: During standard annual shut-down procedures, verify that the screw terminals on the rear connector block remain tightly secured against vibration loosening.
Calibration Verification: Check the indicator accuracy annually using a certified temperature simulator to ensure tracking loops stay perfectly true to sensor input curves.