TH1 HÕMÉRSÉKLETMÉRÉS ÉS KALIBRÁCIÓ

Cikkszám: TH1

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RENDELÉSI SPECIFIKÁCIÓK

• Asztali egység, tartalmaz hipszométert/vízfürdõt és jégtartót a különbözõ hõmérsékletek elõállításához.
• Pontos platina ellenállású hõmérõ (PT100) öt pontos NAMAS kalibrációs tanúsítvánnyal, a hõmérséklet kijelzés °C-ban.
• Egyéb hõmérõk:

- Platina ellenállású hõmérõ

- K-típusú termoelem

- Termisztor

- Bimetál hõmérõ

- Folyadékos hõmérõ

• A konzol tartalmaz minden szükséges elektronikát és RCD-t. A digitális mérõmûszer kiválasztó kapcsolóval jelzi ki a mért hõmérséklet értékeket. Számítógéphez csatlakoztatható interfész segítségével.
• A hipszométer, jégtartó és az elektromos konzol egy PVC alapzaton helyezkedik el.
• Opcionális interfész kiegészítõ (TH-304IFD) oktatószoftverrel.
• Részletes kézikönyv.

KÍSÉRLETI LEHETÕSÉGEK

• Mérés és hõmérõskálák fogalma.
• Hõmérsékletmérés, és a különbözõ mérõeszközök tulajdonságai.
• Az „International Temperature Scale” (ITS90) felépítése.
• Kalibráció és a fix pontok használata.
• Mérési és kalibrációs hibaforrások. 

A termék részletes technikai, mûszaki adatait lásd lent, illetve a letölthetõ pdf. tartalmazza. Amennyiben részletesebb magyar nyelvû leírásra van szüksége, kérjük jelezze.

KEY FEATURES

> Thermometric properties (physical changes due to temperature)

of different sensors are investigated

> Condensing vapour (using a hypsometer) provides an

accurate fixed point for calibration

> Stirred hot water bath provides variable temperatures

> Reference PRT with NAMAS calibration supplied

> All electrical sensors can be logged using a PC

(optional teaching software available)

DESCRIPTION

A bench top unit designed to introduce students to temperature, temperature scales and commonly available devices to measure temperature.

The equpment comprises a hypsometer/hot water bath and ice flask to generate accurate fixed points (the condensation point and triple point of water) and variable temperatures.

Temperature sensors having different thermometric principles and characteristics are supplied. An accurate platinum resistance thermometer (PT100) with five point NAMAS calibration certificate and temperature indicated directly in °C, is included for reference.

The temperature of the condensing water vapour in the hypsometer can be determined accurately using steam tables (included in the teaching manual and educational software), provided that an accurate barometer (not supplied) is available. The water level is simply raised to change the hypsometer into a variable temperature water bath.

The unit is designed for safe operation with insulation surrounding the vessel and a protected steam vent. A radiation shield surrounds the sensors to be calibrated to minimise measurement errors. A common carrier allows all sensors to be transferred simultaneously from ice flask to the hypsometer/water bath.

All power supplies, signal conditioning circuitry etc are contained in an electrical console with appropriate current protection devices and an RCD for operator protection.

All thermometric properties and temperatures measured are displayed on a digital meter with selector switch and all corresponding signals are routed to an I/O port for connection to a PC using an optional interface device with educational software package (TH-304IFD).

The following sensors/signal conditioning circuits are included:

Accurate reference PRT with linearised output in °C.

Industrial PRT with a bridge circuit to measure the resistance in Ohms. Higher current can be passed through the sensor to show the effect of self-heating.

Type-K thermocouple using a precision preamplifier to measure the thermoelectric voltage with cold junction compensation or a second thermocouple in ice as required.

Additional thermocouples allow errors due to response and conduction to be demonstrated. An additional conditioning circuit with user adjustable zero and span controls allows the output to be displayed as a direct reading thermometer calibrated in °C.

Thermistor with constant current through the sensor to measure the resistance in Ohms.

In addition to the thermoelectric sensors a liquid in glass and bimetallic thermometer are also supplied.

OPTIONAL ACCESSORIES

TH-304IFD:

Educational software for TH1-TH5 on a single CD-ROM complete with Data-logger

RECOMMENDED INSTRUMENTS

Barometer: (to determine absolute pressure)

Stop clock: (when not using the optional interface device/educational software)

DC calibrator/thermocouple simulator: (to demonstrate calibration of instrumentation)

Resistance box/PRT similator: (to demonstrate calibration of instrumentation/lead errors)

REQUIREMENTS

Single phase electrical supply:

TH1-A: 220v/1ph/50Hz @ 13A

TH1-B: 120v/1ph/60Hz @ 25A

Fill with pure water:

Hypsometer: 1 litre

Water bath: 4 litres

Source of ice shavings made from pure water

SHIPPING SPECIFICATION

Volume: 2.0m3

Gross weight: 15kg

OVERALL DIMENSIONS

Height: 0.680m

Width: 0.700m

Depth: 0.325m