Comark RF500 Bedienungsanleitung PDF herunterladen (Seite 31)

GLOSSARY OF TERMS

ATEX: Atmosphére Explosive. Refers to the current

standards for Intrinsically Safe equipment.

Baseefa: Refers to Baseefa 2001 Ltd, the notiﬁed body

for Comark ATEX compliance.

Differential Measurement: Ability of an instrument

to measure temperature, pressure etc. simultaneously

from two different points and to calculate the difference

between them.

Distance to Spot Size Ratio: The measure of the

increase in the target area diameter detected by an

infrared thermometer, over the distance from instrument

to target surface.

Emissivity: The natural level of infrared radiation from

the surface of any material. Emissivity is measured on a

scale from 0.1 to 1.0, where 1.0 represents the radiation

from a black body.

HACCP: Hazard Analysis and Critical Control Point.

The quality system used throughout the food industry to

ensure safe food.

HVAC: Heating, Ventilating and Air Conditioning.

IP Rating: Set of standards for dust and waterproof

protection. Many Comark instruments are rated at IP67.

Lumberg: Connector with locking screw, used to provide

strong, secure probe-to-instrument connections with

better prevention of liquid ingress.

NPL: The National Physical Laboratory.

Operating Range: Temperature and humidity limits

within which an instrument will function correctly.

Pt100: Platinum resistance thermometer. High accuracy

temperature sensor.

“Quick” Calculations: Pre-programmed calculations

available in software, such as average or standard

deviation.

Resolution: Indicates the smallest difference in

measurements that can be detected and displayed by

the instrument, e.g. 0.1° indicates that the instrument

can detect differences of one tenth of a degree. In some

cases there can be a difference between the detected

measurement change and the displayed change.

Sub–miniature: Two-pin industry standard connector.

System Accuracy: Temperature accuracy level for the

instrument and probe combined. Instrument accuracy

excludes the probe.

Thermistor: Type of temperature sensor offering

accuracy suitable for food applications.

Thermocouple: Type of temperature sensor using

bi–metal electrical properties. Eight types of bi-metal

combinations are available: – K, N, T, J, R, S, E and B –

with different measurement ranges and characteristics

to suit different applications.

UKAS: The United Kingdom Accreditation Service.

Wraparound: Ability to program a data logger to

continue logging when its memory is full, by logging new

readings over the oldest readings already in the memory.

°C

1820

1767

1372

1300

1200

1100

1000

850

800

760

700

650

600

545

500

450

400

260

250

200

190

150

140

125

120

110

100

–1

–5

–10

–18

–20

–25

–30

–32

–40

–50

–55

–80

–100

–200

°F

3308

3213

2502

2372

2192

2012

1832

1562

1472

1400

1292

1202

1112

1013

932

842

752

500

482

392

374

302

284

257

248

230

212

194

190

185

176

167

158

149

145

140

122

104

–4

–13

–22

–26

–40

–58

–67

–112

–148

–328

Type

Temperature Range

–200°C to +1372°C

–200°C to +1300°C

–200°C to +400°C

–200°C to +1200°C

Type

R, S

Temperature Range

–50°C to +1767°C

–200°C to +1000°C

0°C to +1820°C

THERMOCOUPLE LIMITS

CONVERSION

FORMULA

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