A large, easy to read LCD on the RIS indicates gas concentration and features a "strobing" visual alarm that is triggered when a preset alarm level is exceeded. The LCD also shows self-diagnostic data such as unit readiness, alarm set level, battery current and charge voltage, percent of sampling tape remaining and fault situations. The RIS's modular internal design makes maintenance quick and easy. Many system faults can be readily identified using the unit's test mode.

An internal terminal strip provides a connection for the eternal power supply, an audible alarm relay, and analog output. An internal card cage allows the unit to accept a number of optional upgrade plug in printed circuit cards for enhanced performance and capabilities.

Typically, up to 8 hours of sampling data can be stored in the RIS's internal memory. This allows personnel to review data over the course of an entire workday to pinpoint when and where toxic gas concentrations occur. The unit calculates 8 hour and 15 minute PNA values and can be set to alarm at TWA and STEL values.

A Memory and Printer option gives the RIS the capability to send its output to a printer on demand or on a regular, timed basis. This option enables the unit to store data for the last seven day sampling period. The printout will automatically include the 8 hour and 15 minute TWAs based on the last data available.

By using the 4-20 mA output, it is possible to network RIS units into a multi point monitoring system, supervised by a central controller. This capability enables personnel to remotely monitor and control the RIS, providing instant access to gas monitoring information in all parts of a facility.

How to Order an RIS

Step 1: Which gas do you wish to detect? Determine the instrument part number.

Step 2: Order the required tape cassette. Tape cassettes are ordered separately. We recommend ordering cassettes through a blanket order. Each cassette lasts approximately 60 days. Cassettes should not be stored over 4 months in ambient conditions. Do not use cassettes beyond the end of life date marked on the case.

Step 3: What power supply do you need? An AC power supply is required. Note: Each RIS comes equipped with a backup battery as standard.

Step 4: What alarming needs do you have? The RIS provides only a visual indication of the reading. No audible alarm or siren is installed. Each unit can be equipped with an alarm module kit that can accommodate common visual and audible alarms for up to three instruments or an optional relay board may be ordered that provides up to three relay outputs per instrument for separate alarm annunciation devices.

Instrument Specifications

Accuracy	+/- 15% of reading +/- 1 ppb	ppb Ranges
	ppm Ranges	+/- 15% of reading +/- 0.01 ppm
Power Input Requirements	Power Transformer	12 VDC
	Input Current	Depends upon model & conditions
	Low Flow Models	Normal Run Current (charged battery)= 150 to 200 mA Run Current (discharged battery)= 500 to 700 mA
	High Flow Models	Normal Run Current (charged battery)=250 to 300 mA Run Current (discharged battery)=600 to 800 mA
Solid State Relay Output	Standard System	1 Combined Gas/Fault Alarm
	Optional Outputs	2 Gas Alarms plus 1 Fault Alarm
Analog Output	Standard	4-20 mA is available on the instrument, 0-1 VDC can be hardware selected, in both cases the minimum = zero concentration and the maximum value = system range minimum
Display	Parameters	System readiness status, measured concentration, tape remaining and icons for gas & fault alarms
	Test Mode	Alarm set points, system current (mA), alarm type, regulated voltage (V), active gas type, track 1&2 light levels, date & time with optional serial printer interface pcb
Front Panel	Membrane switch panel: Four switches for the following functions: PRINT, 8 HR, TWA/DIGIT SET, 15 MIN TWA/DECADE & HOLD/RELEASE
Battery	Sealed Lead Acid, charge maintained with external power connected
Temperature	-10 to 40°C
Humidity	5-95% RH
Sampling Input	Teflon input tubes
Printer Options	TTL serial interface and 7 day memory
Cable Glands	3X for input/output cables, prewired connector for optional printer
Enclosure	IP-55 with sealed glands
Dimensions	7" D x 11.75" W x 7.875" H
Weight	11.5 pounds

Ordering Information

For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com.

Gas	Instrument Catalog No.	Cassette Catalog No.
TDI RIS, 0-100 ppb, Alarm 1: 5 ppb, Alarm 2: 10 ppb	2772-0010	096-3018-1
HDI RIS, 0-500 ppb, Alarm 1: 5 ppb, Alarm 2: 0.1ppm	2772-0100	096-3018-9
MDI high flow RIS, 0-200 ppb, Alarm 1: 5 ppb, Alarm 2: 10 ppb, Flow 700 cc/min	2772-0120	096-3018-2
TDI, MDI, IPDI high flow, 0-200 ppb, Alarm 1: 5 ppb, Alarm 2: 10 ppb, Flow 700 cc/min	2772-0160	096-3018-11
Phosgene A & Chloroformates RIS, 0-5 ppm, Alarm 1: 0.05 ppm, Alarm 2: 0.1 ppm	2772-0030	2772-1030

Accessories Ordering Information

Description	Catalog No.
Battery Pack for all Low Flow RIS	2772-2081
Battery Pack for High Flow RIS	2772-1713
3 Alarm Relay (low, high & fault), Solid State, 1 amp Related Relays	2701-1761
Inlet Tube for all Low Flow RIS	2772-1311
Audible/Visual Alarm Module with Battery Back Up	2772-2081

Measuring the Level of Polymeric MDI Vapors in the Workplace using Scott MDI Monitors

Calibration of a Direct Reading Airborne MDI Monitor for Monitoring HDI Biuret and HDI Isocyanate Aerosols

RIS literature

Features

Tough, NEMA 4X enclosure for safe, dependable operation

Large LCD readout provides gas levels and diagnostic cues

Modular design for easy maintenance

Continuous data storage capability

Memory and print options for greater versatility