Detcon FP-424C Manual de usuario descargar pdf (Pagina 7)

4.0 SPECIFICATIONS

Method of Detection

Catalytic detector diffusion/adsorption

easurement Range

0-100% LEL (lower explosive limit)

Accuracy/Repeatability

± 3% LEL in 0-50% LEL Range

± 5% LEL in 51-100% LEL Range

Response/Clearing Time

T50 <10 seconds; T90 <30 seconds

Zero Drift

< 5% per year

Operating Temperature Range

-40° to +167° F; -40° to +75°C

Operating Humidity Range

0-100% RH (non-condensing)

Output

Linear 4-20 mA DC

Input Voltage

11.5-28 VDC

Power Consumption (maximum)

< 2.1 watts @ 24 VDC

Electrical Classification

Explosion Proof; Class I, Div. 1; Groups B, C, D

Safety Approvals

CSA/NRTL (US OSHA Certified)

Warranty

Sensor: 2 year conditional

Transmitter: 2 year

Field Wiring

3 conductor; max 10 ohms single conductor resistance

Max Ohms Between Sensor and Transmitter (in applications where sensor head is remotely mounted)

1/2 ohm

5.0 INSTALLATION

Optimum performance of ambient air/gas sensor devices is directly relative to proper application and

installation practice.

5.1 Field Wiring Table

Detcon Model FP-424C wiring consists of three conductors: + (+24VDC power), – (DC common), and MA

(4-20 mA DC signal output referenced to DC common). Maximum single conductor resistance between

sensor and controller is 10 ohms. Maximum wire size for termination in the sensor assembly terminal con-

nector board is 14 gauge. Note the wiring table below.

AWG Meters Feet

20 240 800

18 360 1200

16 600 2000

14 900 3000

Note 1:

This wiring table is based on stranded tinned copper wire and is designed to serve as a reference only.

Note 2: Shielded cable may be required in installations where cable trays or conduit runs include high volt-

age lines or other sources of induced interference.

Note 3: The supply of power must be from an isolating source with over-current protection as follows:

AWG Over-current Protection AWG Over-current Protection

22 3A 16 10A

20 5A 14 20A

18 7A 12 25A

Detcon Model FP-424C Combustible Gas Sensor PG.7

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Comentarios a estos manuales

Sin comentarios

Detcon FP-424C Manual de usuario Pagina 7

Comentarios a estos manuales