Specifications – Det-Tronics 505 Combustible Gas Detector Transmitter with Combustible Gas Sensor CGS User Manual

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3.1

SPECIFICATIONS

TRANSMITTER

INPUT VOLTAGE—

With signal loop impedance option A:

10 to 30 Vdc

With signal loop impedance option B:

17 to 30 Vdc.

Refer to “Description” section for additional information

regarding impedance option.
Linear, regulated, filtered 24 Vdc power source is

recommended.

POWER CONSUMPTION—

4.0 watts maximum.

PEAK STARTUP CURRENT—

Less than 0.5 ampere for < 0.2 second at 10 Vdc input,

and less than 0.2 ampere for < 0.2 second at 24 Vdc

input.

OUTPUT CURRENT—

Linear 4 to 20 milliamperes.

CURRENT LEVEL—

Fault:

< 2.0 mA.

Calibration Mode:

3.4 mA (non-adjustable).

LOAD RESISTANCE—

Option A:

125 ohms maximum.

Option B:

500 ohms maximum.

Refer to “Description” section for additional information

regarding impedance option.

TEMPERATURE RANGE—

Operating:

–40°F to +167°F (–40°C to +75°C).

Storage:

–67°F to +185°F (–55°C to +85°C).

HUMIDITY RANGE—

0 to 99% RH, non-condensing.

RFI/EMI IMMUNITY—

Less than ± 0.5 mA signal output variation with a 5 watt,

157 Mhz or 451 Mhz walkie-talkie keyed at distances

greater than 1 foot from Model 505 with junction box

cover installed.

DIMENSIONS—

See Figure 4.

CERTIFICATION—

For complete approval details, refer to the apprpriate

Appendix:

Appendix A – FM

Appendix B – CSA

Appendix C – ATEX/CE

Appendix D – IECEx.

3.77

(9.6)

1.28

(3.3)

3.46

(8.8)

4.7

(11.9)

2.7

(6.9)

5.2

(13.2)

5.86

(14.9)

E2281

SEE FIGURE 5 FOR SENSOR DIMENSIONS

Figure 4—Dimensions of Transmitter Junction Box in Inches (Centimeters) Multiport Model

APPROVED