产品名称：Model 912A Continuous Gas Analyzer for Oxygen & Methane

On the B ('Cal Now') and C (Full Auto-calibration) models, all calibration functions are controlled through the display rather than manual potentiometers. The C model includes additional helpful information for effective analyzer preventative maintenance.

The C model has timed alerts that will appear on the display when a filter is ready to be changed. The alert can either be 'Accepted' if the filter is changed, or 'Acknowledged' if there is no immediate need. Regular maintenance of filters are critical to the long term reliability of the analyzer. Diagnostics and troubleshooting information are also included in the display interface of the B and C models. This assists operators to quickly determine the cause of an alarm and get the analyzer back on-line. Spare part numbers relevant to the alarm are included in the display.

Models:

900 (A, B, or C) - O2		H1 - H2S, range 0 - 200 PPM
901 (A, B, or C) - CH4		H2 - H2S, range 200 - 5,000 PPM
902 (A, B, or C) - O2 and CH4		H3 - H2S, range 1,000 - 10,000 PPM (if no CO2 in sample)
903 (A, B, or C) - O2, CH4, and CO2		H4 - H2S, range 1,000 - 10,000 PPM (if CO2 is in sample)
Other combinations can be requested		BTU - BTU readout, range 0-1000 BTU

A - Base Model
• Easy to use manual potentiometer calibration with LCD digital displays for each gas
• Temperature controlled sensors to reduce drift due to ambient temperature swings
• Long life electrochemical O2 sensor
• Modular, field-cleanable infrared CO2/CH4 detector
• Cabinet positive-pressure kit to minimize corrosive effects of hydrogen sulfide (H2S) on cabinet electronics & sensors
• Built in sample pump, pre-filter, filters, and flow meter
• Automatic moisture removal without the use of cooling water, compressed air or failure-prone thermal-electric elements
• Vacuum gauge and valve to allow user to measure and minimize vacuum effects if unit is vented back to blower
• Rugged NEMA4 (IP65) enclosure
• 4 - 20 mA outputs for each gas
• Low flow alarm & relays

B - 'Cal-Now' Model
• Same features as Base model, plus:
• Microprocessor control and LCD touch screen display
• Graphing view shows approx. 12 hours of historical data
• Display includes access to alarms, basic troubleshooting guides, and sensor diagnostic information
• Magnetic 'cal now' button allows 'one touch' calibration without the need to open the enclosure door

C - Full Auto-calibration Model
• Same features as Base and 'Cal Now' models, plus:
• Automatic analyzer calibration with full-color touchscreen LCD display
• Preventative maintenance alerts and user adjustable alert frequency

OPTIONS
• Gas hi/low alarms with relay contacts
• Isolated analog, RS232, RS485, MODBUS, and Ethernet outputs available
• Class 1 Division 2 Group BCD rated purge kit for use in hazardous areas
• Cold weather package for operation to -20°C (-5°F)
• Solid-state cabinet coolers that do not require instrument air

CALIBRATION
• Ambient air for O2 span and CO2 & CH4 zero
• Analyzed calibration gas of CH4 in nitrogen with a representative balance of CO2 and N2 for CO2 & CH4 span and O2 zero

Method of Detection:
Long life electrochemical O2 sensor, field-cleanable infrared CH4 & CO2 detector

Ranges Available:
0-25.0% O2; any range between 0-50.0% and 0-100.0% CH4, CO2

Resolution:
0.1% on CO2, O2, & CH4

Accuracy and Repeatability:
±1% of full scale

Drift:
Less than 2% of full scale per month

Response Time (T-90):
Less than 30 seconds not including sample line delay

Ambient Temperature Range:
40-120°F (4-48°C). Lower temperatures (-5°F, -20°C) with Cold Weather Package

Linearity:
±1% of full scale for each gas measured

Size and Weight:
Approx. 24" H x 20" W x 10" D @ 90 lbs (61 x 51 x 25 cm @ 20 kg) Physical data may vary depending on 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 O2, high CO2, low CH4, low flow; SPDT relays with 10A contacts

H-Tech Shipping Information
Estimated Ship Dimensions: " x " x "
• Estimated Ship Weight: lbs
• Lead time: 63 days
• Shipping origin: Niagara Falls, United States
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