- function: meter of toxic gases concentration in the air
- measurement: CO2 concentration (carbon dioxide)
- measurement method: NDIR
- analogue output 4..20mA or 0..10V
- 1 transmitter output
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The meter IGM-0171 is a stationary device, of small size, powered
from an outside source. The meter is characterized by modern
construction based on the NDIR method (non-dispersive infrared method).
It is relays on measurement of attenuation of infrared radiation
of a defined wave length put through the measured gas, which is
suppressed depending on the carbon dioxide content in the examined gas.
The NDIR method assures accurate and stable measurement result as well
as failure-free work for many years.
The meter has a digital
interface RS-485 used during meter’s
calibration and for connecting the meter to a digital measurement
system. The meter additionally has 1 transmitter output, of regulated
work thresholds, in standard switched on with for concentration 2000
ppm and switched off with concentration 1000 ppm. Optionally, depending
on a version, the meter has 1 additional analogue output: 4..20 mA or
0..10V.
Additional equipment of the meter is provided by a power pack LB-830
(12V, 100mA, stabilized) that additionally has the systems protecting
the meter’s analogue output.
| METER MEASUREMENT CHARACTERISTICS IGM-0171 | |
|---|---|
| Sensor type | NDIR |
| Scope of CO2 volume content measurement | 0...10000 ppm (0...1 %) |
| Scope of orientation CO2 indication content | 10000...20000 ppm (1...2 %) |
| CO2 measurement accuracy | +/- 5 % actual indication +/- 50 ppm |
| CO2 measurement resolution |
10 ppm |
| Standard scope of an analogue output |
0...10000 ppm |
| Meter response time (up to level of 90% ) | 40 seconds |
| Meter warm-up time after power supply switch on |
3 minutes |
| MEASUREMENT RESULTS OUTPUTS | ||
|---|---|---|
| Digital output |
RS-485 | 9600 bodes, 8 bits, 1 stop bit, without an evenness bit |
| Analogue output (optional) | 4..20 mA / max. 500 ohm | Meter version: IGM-0171-01 |
| 0...10 V / min. 1000 ohm | Meter version: IGM-0171-02 | |
| Transmitter output (alarm) |
60 V / 1 A | Rwy(ON) <= 0,3 ohm, Rwy(OFF) >= 3 Mohm |
| Transmitter output hysteresis |
ON: 2000 ppm, OFF: 1000 ppm |
levels programmed by through an interface RS-485 |
| WORK CONDITIONS | ||
|---|---|---|
| Scope of environment relative humidity | 0...95 % | without steam condensation |
| Scope of work temperatures | 5...50 °C | influence on measurement: +/- 0,25% actual indication to 1 °C
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| Scope of storage temperatures | 0...50 °C | |
| Measured air pressure |
84...106 kPa | influence on measurement: +/- 0,8 % actual indication to 1 kPa |
| Acceptable carbon dioxide content volume in the measured air |
0...2 % | |
| Acceptable oxygen content volume in the measured air |
0...21 % | |
| Acceptable nitrogen content volume in the measured air |
left (refill up to 100%) | |
| Dustiness |
maximum 2 mg/m3 | |
| Average time of meter exploitation |
8 years | |
| Recommended scope of calibration |
1 year | |
| POWER SUPPLY | ||
|---|---|---|
| Scope of voltages / meter energy consumption IGM-0171 | 12 +/- 3 V / DC | 30 mA |
| Voltage / power of a power pack supply LB-830 | 230 +/- 15 V / 50 Hz | 2 VA |
| Output voltage / maximum power pack current charge LB-830 | 12 +/- 0,1 V | 100 mA |
| OVERALL DIMENSIONS, MASS | |
|---|---|
| Meter overall dimensions IGM-0171 | 91 x 105 x 60 mm |
| Meter mass IGM-0171 | approximately 0,3 kg |
| Overall power pack dimensions LB-830 | 91 x 55 x 66 mm |
| Power pack mass LB-830 | approximately 0,2 kg |
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Dystrybutor: LAB-EL Elektronika Laboratoryjna Sp. J. ul. Bodycha 68b, 02-495 Warszawa tel: (022) 667 71 18, fax: (022) 867 53 32 poczta elektroniczna: info@label.com.pl witryna internetowa: http://www.label.com.pl internetowa stacja meteorologiczna: http://www.meteo.waw.pl internetowa stacja meteorologiczna w komórce: wap.meteo.waw.pl Ostatnia aktualizacja: 22.11.2006 |
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