Features:
- Unique measuring principle ”Opt-Sonic calculation” is applied
- This can minimise the interference effects caused by interference gases, and a high-accuracy measuring result can be obtained
- Fast response time T90 reaction within 5 seconds
- High repeatability +/- 0.02MJ/m3
- Wide operation temperature -20 ~ +57 degree C
- Explosion-Proof structure even for Hydrogen Exd IIB
- High ingress protection level IP66 / IP67
- Remarkable temperature characteristic
- Below 0.10MJ/m3 fluctuation for the temperature change in a day (< 20 degree C)
- Easy to switch the display among “Calorific value”, “Density” and “WOBBE index” just by the button operation
Applications:
- Electric Power Energy
- Gas Energy
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Gas Engine for Ship
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Biogas
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Iron Steel
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Refinery
Overview of the Explosion-proof Calorimeter
The OHC-800 is an all in one explosion-proof calorimeter which features high accuracy, continuous measurement and high-speed response.
“Opt-Sonic calculation” is applied by using Optical sensor and Sonic sensor.
“Opt-Sonic calculation” is based on the calculation combining 2 measuring results obtained by the 2 sensors. This can minimise the interference effects on the reading caused by interference gases, and enable the high-accuracy and reliable measurement.
* Opt-Sonic is a term coined by RIKEN KEIKI to describe Optical and Sonic sensors
Easy to switch the display among “Calorific value”, “Density” and “WOBBE index”
Displayed unit is easily switched by pressing the button. Laborious calculation is not needed.
Fulfilling self-diagnosis function and running cost.
Self-diagnosis function including fault diagnostic prevents the calorimeter from being incapable of measuring the gas. Few consumables are needed and this saves running cost.
Body structure that can be installed into all types of location.
Structure is robust with Explosion-Proof (Exd IIB+H2 T4) and high ingress protection level (IP66 / IP67) Both 100VAC~240VAC and 24VDC power supply can be supplied.
Downloads:
Specifications of the Explosion-proof Calorimeter
| Model | OHC-800 |
| Measuring principle | Opt-Sonic calculation through measurement of refractive index and sound speed |
| Measuring gas | CH4 basis Paraffinic Hydrocarbon gases as represented by Natural Gas *1 |
| Measuring targets | Calorific value (Density / WOBBE index selectable) |
| Measuring range *2 | Calorific value : 25.00～50.00 MJ/㎥ (Gross, 0 degree C, 101.325kPa converted) Density : 0.500～1.500 MJ/㎥ (Specific gravity converted) |
| Measuring method | Constant-flow-rate gas introduction using external sampling devices |
| Display | Full-dot LCD (with backlight), 3 color LED lamp |
| External Output | 4-20 mA DC (isolated, source current type) maximum load resistance of 300 Ω / RS-485 communication |
| FAILURE alarm | Low flow, Sensor unit abnormality, Low light amount |
| FAILURE alarm display | Lamp (red) / Content indication on LCD |
| FAILURE alarm contact *3 | No-voltage contact 1a or 1b De-energise (Energise when alarming) or Energise (De-energise when alarming) Contact capacity of 2 A, 30 VDC (resistance load) |
| Self-diagnostic function | FUNCTION CHECK (warm-up or maintenance mode), MAINTENANCE REQUIRED, OUT OF SPECIFICATION |
| Self-diagnostic display | FUNCTION CHECK, OUT OF SPECIFICATION : Lamp (orange)/Content indication on LCD MAINTENANCE REQUIRED : Lamp (green) / Content indication on LCD |
| Self-diagnostic contact | FUNCTION CHECK, OUT OF SPECIFICATION : No-voltage contact 1a or 1b De-energise (Energise when alarming) or Energise (De-energise when alarming) Contact capacity of 2 A, 30 VDC (resistance load) MAINTENANCE REQUIRED : SSR contact, contact capacity of 20 W, 240 VAC (resistance load) |
| Power supply | 100 – 240 VAC ±10%, 50/60 Hz, max. 18 VA or 24 VDC ±10%, max. 5 W (The setting can be changed to either the AC or DC) |
| Ingress Protection level | Equivalent to IP66 and IP67 |
| Operation temperature | -20～+57 degree C（TIIS）/-20～+60 degree C（ATEX/IECEx） |
| Operation humidity | 95%RH or less (no condensing) |
| Outer dimensions / Weight | Approx. 286 (W) x 453 (H) x 150 (D) mm / Approx. 23 kg |
| Explosion-Proof structure | Flame-proof enclosures (Explosion-proof class: ExdⅡB+H2 T4 <TIIS>/Ⅱ2GExdⅡB+H2T4 <ATEX/IECEx>) |
*1 Total concentration of interference gases such as N2, O2, CO2, CO etc. contained in a target gas is estimated as less than 20%
*2 Contact Control Equipment Pty Ltd for the other measuring ranges
*3 Contact setting is adjustable
- Overview
-
Overview of the Explosion-proof Calorimeter
The OHC-800 is an all in one explosion-proof calorimeter which features high accuracy, continuous measurement and high-speed response.
“Opt-Sonic calculation” is applied by using Optical sensor and Sonic sensor.
“Opt-Sonic calculation” is based on the calculation combining 2 measuring results obtained by the 2 sensors. This can minimise the interference effects on the reading caused by interference gases, and enable the high-accuracy and reliable measurement.* Opt-Sonic is a term coined by RIKEN KEIKI to describe Optical and Sonic sensors
Easy to switch the display among “Calorific value”, “Density” and “WOBBE index”
Displayed unit is easily switched by pressing the button. Laborious calculation is not needed.Fulfilling self-diagnosis function and running cost.
Self-diagnosis function including fault diagnostic prevents the calorimeter from being incapable of measuring the gas. Few consumables are needed and this saves running cost.Body structure that can be installed into all types of location.
Structure is robust with Explosion-Proof (Exd IIB+H2 T4) and high ingress protection level (IP66 / IP67) Both 100VAC~240VAC and 24VDC power supply can be supplied. - Downloads
-
Downloads:
- Specifications
-
Specifications of the Explosion-proof Calorimeter
Model OHC-800 Measuring principle Opt-Sonic calculation through measurement of refractive index and sound speed Measuring gas CH4 basis Paraffinic Hydrocarbon gases as represented by Natural Gas *1 Measuring targets Calorific value (Density / WOBBE index selectable) Measuring range *2 Calorific value : 25.00～50.00 MJ/㎥ (Gross, 0 degree C, 101.325kPa converted) Density : 0.500～1.500 MJ/㎥
(Specific gravity converted)Measuring method Constant-flow-rate gas introduction using external sampling devices Display Full-dot LCD (with backlight), 3 color LED lamp External Output 4-20 mA DC (isolated, source current type) maximum load resistance of 300 Ω / RS-485 communication FAILURE alarm Low flow, Sensor unit abnormality, Low light amount FAILURE alarm display Lamp (red) / Content indication on LCD FAILURE alarm contact *3 No-voltage contact 1a or 1b De-energise (Energise when alarming) or Energise (De-energise when alarming) Contact capacity of 2 A, 30 VDC (resistance load) Self-diagnostic function FUNCTION CHECK (warm-up or maintenance mode), MAINTENANCE REQUIRED, OUT OF SPECIFICATION Self-diagnostic display FUNCTION CHECK, OUT OF SPECIFICATION : Lamp (orange)/Content indication on LCD MAINTENANCE REQUIRED : Lamp (green) / Content indication on LCD Self-diagnostic contact FUNCTION CHECK, OUT OF SPECIFICATION : No-voltage contact 1a or 1b De-energise (Energise when alarming) or Energise (De-energise when alarming) Contact
capacity of 2 A, 30 VDC (resistance load)
MAINTENANCE REQUIRED : SSR contact, contact capacity of 20 W, 240 VAC (resistance load)Power supply 100 – 240 VAC ±10%, 50/60 Hz, max. 18 VA or 24 VDC ±10%, max. 5 W (The setting can be
changed to either the AC or DC)Ingress Protection level Equivalent to IP66 and IP67 Operation temperature -20～+57 degree C（TIIS）/-20～+60 degree C（ATEX/IECEx） Operation humidity 95%RH or less (no condensing) Outer dimensions / Weight Approx. 286 (W) x 453 (H) x 150 (D) mm / Approx. 23 kg Explosion-Proof structure Flame-proof enclosures (Explosion-proof class: ExdⅡB+H2 T4 <TIIS>/Ⅱ2GExdⅡB+H2T4 <ATEX/IECEx>) *1 Total concentration of interference gases such as N2, O2, CO2, CO etc. contained in a target gas is estimated as less than 20%
*2 Contact Control Equipment Pty Ltd for the other measuring ranges
*3 Contact setting is adjustable