Keterangan
APPLICATIONS
For continuous analysis of methane ( CH4) in process gas streams using an infrared detector. Percent and PPM levels available as Models 470 & 470L respectively.
FEATURES
⢠PPM or percent CH4 by infrared detector
⢠Detector is sensitive, very reliable, and non-depleting
⢠Bright digital readout, 4 - 20 mA outputs
⢠Fast response ( T90 - less than 15 seconds)
⢠Microprocessor control for push button calibration
⢠Easy-to-maintain modular layout
⢠Built in sample pump, flowmeter, and filters
OPTIONS
⢠Hi/ Low gas, low flow, and diagnostic alarms available
⢠Isolated analog, RS232, RS485, MODBUS, and Ethernet outputs available
⢠Sample conditioning systems available for removal of moisture, acidic gas, and dust
⢠Cabinet purge system available for use in hazardous areas
⢠One-step ' cal-now' button with touch screen LCD display
⢠Full automatic calibration with touch screen LCD display
⢠Cold weather package for operation to -5° F ( -20° C)
⢠Cabinet coolers can be fitted to most models
⢠Sensors mounted in temperature controlled heated box to improve accuracy
⢠High temperature filters and probes
CALIBRATION
⢠Easily zero checked on ambient air or nitrogen ( N2)
⢠Span using a known CH4 in nitrogen calibration gas.
DESCRIPTION
The Nova 470 Series CH4 analyzers utilize a simple and reliable microprocessor-based non-dispersive infrared detecter specific to CH4. The detector pulses an infrared beam of light through the sample tube, without the need for a mechanical chopper. In operation, the internal sample pump draws the sample gas through the
filter/ condensate trap, secondary filter, flowmeter, and then on to the infrared detector. The detector output is
digitally linearized and then displayed as percent or PPM CH4 on the digital meter. The output is also available as
an analog or digital signal.
MODELS
There are seven types of mounting configurations available ( shown as 470 % version) :
⢠470N4 - Wall mounted NEMA4 ( IP65) enclosure rating
⢠470N4X - Wall mounted corrosion-resistant NEMA4X
( IP65) enclosure rating
⢠470N12 - Wall mounted NEMA12 ( IP52) enclosure rating
⢠470PM - Panel mounted, slides open for easy access
⢠470RM - 19" ( 483mm) rack mounted, on sliding rails
⢠470N7MC: Wall mounted NEMA7 UL/ CSA explosion-proof with non-intrusive magnetic calibration, Class 1 Div 1 Group BCD
⢠470PMN7: Wall mounted NEMA7 sensor housing with panel mounted control cabinet ( two separate enclosures)
SPECIFICATIONS
Method of Detection : Single cell NDIR with no moving parts
Ranges Available : 470L - 0-500, 0-1000, 0-3000, 0-5000, PPM CH4, 470 - 0-1, 0-5, 0-10, 0-20, 0-30, 0-50, 0-100% CH4
Resolution : 0.1% CH4 on % versions, 1 PPM CH4 on PPM versions
Accuracy and Repeatability : 1% of full scale
Drift : Less than 2% of full scale per month.
Response Time ( T-90) : Less than 15 seconds
Ambient Temperature Range : 40-122° F ( 5-50° C) . Lower temps ( -5° F, -20° C) avail. with Cold Weather Package.
Linearity : ± 1% of full scale
Size and Weight : Physical data will vary depending on enclosure style and options required
Power : 115VAC 60Hz ( 220VAC 50Hz available)
Output Options : 4-20ma into 500 ohms non-isolated standard Isolated 4-20mA, RS232, RS485, MODBUS, Ethernet outputs optional
Alarms : High and/ or low alarm contacts available, relay contacts SPDT 5A @ 220VAC rating.
Low flow alarm optional
Prioritas Indotrade