Practical-instrument-electronics 322-1 Manual do Utilizador descarregar pdf (Página 7)

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Practical Instrument Electronics

82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • [email protected] • www.piecal.com

General

Accuracy ±(0.008% of Reading + 0.006 mV)

Cold Junction Compensation

± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11 years

Millivolt Range -13.000 to 80.000 mV

Operating Temperature Range -25 to 60 °C (-10 to 140 °F)

Temperature Effect ≤ ±50 ppm/°C; Cold Junction Sensor ≤ ±25 ppm/°C

Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing

10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing

Size L=5.63 x W=3.00 x H=1.60 inches

Weight 12.1 ounces (including boot & batteries)

Batteries Four “AA” Alkaline 1.5V (LR6)

Battery Life 50 Hours

Optional NiMh

Rechargeable battery kit

120 VAC for North America Only; charger, four

NiMh

batteries, AC & DC cords [Part # 020-0103]

Low Battery Low battery indication with nominal 1 hour of life left

Protection against misconnection Over-voltage protection to 60 V dc (rated for 30 seconds)

Display High contrast graphic liquid crystal display. LED backlighting

for use in low lit areas.

Read

Input Impedance

> 10 Megohms

Open Thermocouple

Threshold

Pulse

10,000 Ohms nominal

< 10 microamp pulse for 300 milliseconds

Normal Mode Rejection 50/60 Hz, 50 dB

Common Mode Rejection 50/60 Hz, 120 dB

PIECAL 322 Specifications

Unless otherwise indicated all specifications (except Cold Junction) are rated from a nominal 23 °C, 70 % RH for 1 year from calibration

Source

Output Impedance < 0.3 Ohms

Source Current > 20 mA (drives 80 mV into 10 Ohms)

Noise ≤ 4 microvolts p-p for frequencies of 10 Hz or below

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Practical-instrument-electronics 322-1 Manual do Utilizador Página 7