Det-Tronics NTMOS IP66/IP67 H2S Gas Detector - Manual (Page 15)

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APPENDIX A
FM APPROVAL
NOTE
The NTMOS Gas Detector is designed and approved as a ‘stand alone’ toxic gas detector.
Hazardous Location
Class I, Division 1, Groups B, C, D
Class I, Division 2, Groups A, B, C, D
–40°C to +65°C (Performance verified)
–40°C to +75°C (Haz Loc Rating)
IP66/IP67 (with hydrophobic filter)
IP53 (without hydrophobic filter)
Acidic atmospheres excluded.
Accuracy
Performance tested to ANSI/ISA-92.0.01:
±10% of applied gas concentration or ±2 ppm whichever is greater.
Temperature variation
Performance tested to ANSI/ISA-92.0.01:
–10°C to +50°C, ±5 ppm at 50 ppm of applied gas concentration.
Det-Tronics verified:
–40°C to -10°C, ±10 ppm at 50 ppm of applied gas concentration
+50°C to +65°C, ±8 ppm at 50 ppm of applied gas concentration.
Humidity variation
Performance tested to ANSI/ISA-92.0.01:
5 to 95% RH: ±5 ppm at 50 ppm of applied gas concentration.
Response time (with full Ingress Protection applied)
T50 ≤10.8 seconds with full gas scale applied
T90 ≤33.0 seconds with full gas scale applied.
Mechanical
Model with hydrophobic filter and sinter guard (IP66/IP67)
Model with hydrophobic filter removed and sinter guard (IP53).
Performance tested to ANSI/ISA-92.0.01 – Sample of test requirements
Gas Detected
ANSI/ISA 92.0.01: 1998 (App. A)
H
2
S Requirement
Det-Tronics IP66/IP67 Model NTM
Series Approved Performance
Full Scale Range 10 - 100 PPM full scale 10 - 100 PPM full scale*
Operating Temperature Range –10°C to +50°C –40°C to +65°C*
Storage Temperature Range –35°C to +55°C –40°C to +65°C*
Test Gas Concentration 45 - 55% of full scale 45 - 55% of full scale
Test Gas Tolerance 1 PPM or 5% of concentration 1 1 PPM or 5% of reading
Accuracy/repeatability (Readout or display) 2 PPM or 10% of reading 1 2 PPM or 10% of reading
Accuracy/repeatability (Alarm-only) 2 PPM or 10% of reading 1 2 PPM or 10% of reading
Alarm setpoint 50% of full scale 10 to 90% of full scale
Time, Response to 20% of Final 20 seconds 5.4 seconds
Time, Response to 50% of Final 45 seconds 10.8 seconds
Time, Response to 90% of Final 60 seconds 33.0 seconds
Time, Recovery to 50% of Initial 180 seconds 6.7 seconds
Time, Recovery to 10% of Initial 90 seconds 16.3 seconds
High Concentration 1000 PPM 1000 PPM
High Concentration Recovery Time 10 minutes <= 2 minutes
1 Where two values exist (e.g., 3 PPM or 10% of reading), the value providing the widest tolerance should be used.
*In accordance with FMID 3033318.