Chromalox 3901 Manual de usuario descargar pdf (Pagina 17)

Chromalox 3901 User’s Manual 15

Section 5

Specifications

Alarm Output

Repeatability +/- 1°F or 1°C

Reset

Differential

5°F or 3°C, nominal

Alarm Relay Normally-open, normally-energized, SPST, latching

relay (contacts open on alarm & when no power is

applied to controller - failsafe)

Rating at 120 or 240 Vac (resistive load):

20 amps, 150,000 operations

15 amps, 200,000 operations

5 amps, 800,000 operations

Mechanical life, 10 million operations

Input

Specifications

Type J

Thermocouple

0 to 999°F, 0 to 500°C

Type K

Thermocouple

0 to 1999°F, 0 to 1100°C

Input Loop

Resistance

Up to 150 ohms

Cold Junction

Compensation

Automatic, typically less than 0.1°F per 1°F over

ambient 50 to 120°F

Indications

Open Sensor

Indications

Red LED lamp for J thermocouple input, “1”

illuminates for K thermocouple input Upscale burnout,

alarm indication, contacts open

Accuracy of

Indication

+/- 0.5% of span over mid-80% of scale

Resolution 1°F or 1°C

Repeatability 1°F or 1°C

Alarm Output Red “ALARM” LED

1 2 ... 12 13 14 15 16 17 18 19 20

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Chromalox 3901 Manual de usuario Pagina 17

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