General Monitors S104 - Appendix; Specifications

5.0 Appendix
5.1 Specifications
5.1.1 System Specifications
Sensor Type:
Diffusion, low temp. catalytic bead
Standard industrial types: Combustible
Gas; Solvent Special; Standard and High
TemperatureVersions (See section 5.4)
Typical Life: 3 years in normal service
Warranty:
Two Years
Readout/Relay Modules (See section 5.4):
DC100 Single Channel Display
DC110 Eight Channel Display
DC120 X/P Dual Channel Display
DC130 Dual Channel Display
TA102A Single Channel, 02 Series
Fault Conditions Monitored:
Low DC Supply, Sensor Bead Open,
Calib. Out of Range, EEPROM Failure
Accuracy:
+3% LEL at ambient
Zero Drift:
Less than 5% per year
Response Time:
With 100% LEL Methane Applied,
T50 < 10 sec. & T90 < 30 sec.
Approvals:
FM approved
CSA certified to C22.2 No.152
Cenelec certified (display only with
SST flame arrestor sensors)
CE Mark approval against EMC Directive
and Product Safety
5.1.2 Electrical Specifications
Input Power:
24 VDC @ 250mA nom., 1A during SU
20 to 30 VDC range
Output Current: (
0-22mA @ 300 Ohms max. load)
Fault: 0.0mA
Calibration: 1.5 mA (0.0mA optional)
0-100%LEL: 4 to 20mA
Over-range: 20 to 22mA
Electrical Classification:
Class I, Division 1, Groups B, C & D
NEMA 4x rated
Recommend Three Wire Shielded Cable:
Maximum distance between the Model
S104 and the power source.
AWG Feet Meters
22 750 228
20 1100 335
18 1600 488
16 2250 685
14 4500 1372
For interfacing with 250 ohm input
impedance devices, the following
maximum cable lengths apply, with
respect to the Analog Signal, with the
total loop resistance less than 300 ohms.
AWG Feet Meters
22 1600 488
20 2400 730
18 3800 1160
16 5200 1585
14 9000 2740
NOTE: Good design practices dictate cable
lengths conservatively shorter than the maxi-
mum given values.
17
GENERAL MONITORS
Model S104