| Performance | |
| Measurement Technology | Thermal Conductivity sensor |
| Measured Gases | Air, Ar, CH4, CO2, H2, He or N2 |
| Gas Requirements | Non-condensing sample with particles <3μm |
| Measurement Range | Selectable from 0-5 up to 0-100%
50-100% up to 90-100% |
| Measurement Range (H2 & He) | Selectable from 0-1% up to 0-100%
50-100% up to 99-100%* |
| Display Resolution | 0.1% |
| Display Type | Backlit LCD |
| Intrinsic Error (Accuracy) | < ±2% of span** |
| Response Time (T90) | Standard < 20 seconds** |
| Repeatability | ±0.2% of span |
| Linearity | ±1% span |
| Zero Stability | ±0.5% of span per month |
| Span Stability | ±0.5% of span per month |
| Sample Flow Rate | 100 to 500 ml/min (0.2 to 1.27 scfh) |
| Sample Flow Rate(Ex) | 270 to 330 ml/min (0.54 to 0.66 scfh)) |
Sample Flow Effect
(calibrated at 300 ml/min) | < 1% of span for flows:
100 to 500 ml/min |
| Sample Pressure | Analyzers are callibrated at atmospheric pressure and must be operated with an atmospheric vent, unless otherwise stated |
| Maximum Safe Pressure | 4 barg (58 psig) |
| Sample Temperature | 5 to 45°C (+32 to +104°F) max |
| Sample Cell Temperature | +50°C (+122°F) |
| Electrical Specifications | |
| Analog Inputs | 2 off 4-20 mA inputs
One for an external sensor that can be displayed on the screen
One to act as an active compensation for the process conditions |
| Analog Outputs | 2 off 4-20 mA outputs |
| Output Ranges | Primary range is set to the calibrated range of the instrument
The second is user selectable |
| Alarms | 2 off single pole changeover (SPCO) relays (250 V, 5 A max) |
| Datalogging | The user can use the digital communications to log the output from the analyzer
The unit will store 40 alarm points and the min/max O2 concentrations with date and time stamp |
| Digital Communications | MODBUS RTU over RS485 Protocol |
| Power Supply | 24 V DC; 1.5 A max |
| Operating Conditions | |
| Ambient Temperature | 0 to 40°C (32 to 104°F) |
| Mechanical Specifications | |
| Warm Up Time | < 25 minutes |
| Stabilization Time | 5 minutes |
| Dimensions | 234 x 234 x 172mm (w x d x h) |
| Weight | 9.7kg |
| Wetted Materials | 316 stainless steel, boroscillicate glass,
platinum, (plus O-ring) |
| O-Ring Materials | Viton, Silicone or Ekraz |
| Gas Connection | 1/4” NPT FEMALE GP models, 1/8” NPT FEMALE Ex & GP2 models |
| Ingress Protection | IP66, NEMA 4X |
| Hazardous Area Classification | |
| ATEX | II 2GD
Ex d IIB +H2 T6 Gb
Ex tb IIIC T85°C Db IP66 |
| IECEx | Ex d IIB +H2 T6 Gb
Ex tb IIIC T85°C Db IP66 |
| Temperature ranges for ATEX and IECEx as per O-ring type | Silicon: Ta = -40°C to +55°C
Viton: Ta = -15°C to +55°C
Ekraz: Ta = -10°C to +55°C |
| CCSAUS | Class I, Division 1, Groups B,C,D T6 |
| TC TR Ex-Cert | 1Exd IIB+H2 T6 Gb |
*Ranges 98-100% and 99-100% (for H2 and HE only) will require a flowing reference and selection of the 4-port model.
reference and selection of the 4-port model.
**The typical intrinsic error and response time will be as above. Certain gas combinations and/or ranges may have different specifications. Please consult Michell Instruments for specific cases. For example, CO2 / N2 would be < 50 seconds for T90.
Note: If the 4-port version is selected then a reference gas with a flow rate of 300ml/min is required |
