| 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 range** |
| Response Time (T90) | Standard < 20 seconds** |
| Repeatability | ±0.2 % of range |
| Linearity | ±1 % range |
| Zero Stability | ±0.5 % of range per month |
| Range Stability | ±0.5 % of range per month |
| Sample Flow Rate | 100...500 ml/min (0.2...1.27 scfh) |
| Sample Flow Rate(Ex) | 270...330 ml/min (0.54...0.66 scfh)) |
Sample Flow Effect
(calibrated at 300 ml/min) | < 1 % of range for flows:
100...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 | A constant temperature of +5...+45/+55 °C (+41...+113/+131 °F) |
| Sample Cell Temperature | +50/+60 °C (+122/+140 °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 |
| Power Supply | 24 V DC; 1.5 A max |
| Operating Conditions | |
| Ambient Temperature | +5...+60 °C (+41 °F...+140 °F)
+5...+50 °C (+41...+122 °F) cQPSus |
| Mechanical Specifications | |
| Warm Up Time | < 25 minutes |
| Stabilization Time | 5 minutes |
| Dimensions | 234 x 234 x 172 mm (w x d x h) |
| Weight | 9.7 kg |
| 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 1), 1/8" NPT female (Ex & GP2) |
| Ingress Protection | IP66, NEMA 4 |
| Hazardous Area Classification | |
| ATEX/UKCA | II 2 G D
Ex db IIB +H2 T6 Gb
Ex tb IIIC T85 °C Db IP66 |
| IECEx | Ex db IIB +H2 T6 Gb
Ex tb IIIC T85°C Db IP66 |
| Temperature ranges for ATEX/UKCA and IECEx as per O-ring type | Silicon: Ta = -40 °C...+60 °C (+50 °C for N. America, +55 °C for TR CU Ex (EAC))
Viton: Ta = -15 °C...+60 °C (+50 °C for N. America, +55 °C for TR CU Ex (EAC))
Ekraz: Ta = -10 °C...+60 °C (+50 °C for N. America, +55 °C for TR CU Ex (EAC)) |
| cQPSus | Class I, Division 1, Groups B,C,D T6
Class I, Zone 1
AEx db IIB+H2 T6 Gb / Ex db IIB+H2 T6 Gb |
| TR CU Ex | 1Ex d 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 300 ml/min is required |
