Specification Sheet

Page 2 of 4
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Bump test status indicators Instrument shall be capable of indicating its bump test status.
 Bump PASS: flashing green LED in top right corner and on-screen checkmark.
 Bump FAIL or expiration: flashing red LED in top right corner and no checkmark.
Time/date Instrument must be able to display time and date.
User must be able to reset time and date without tools.
Last calibration date
Instrument must be able to display last successful calibration date.
Instrument power-on Power-on instrument button must be clearly marked.
Sensor Characteristics and Performance
Sensor life Sensors shall have an expected life of four years.
End of life sensor indicator Instrument shall indicate when sensor is close to and at its end of life following
calibration.
Typical t(90) response
times
Combustible sensor < 10 seconds (methane); < 15 seconds (pentane)
O
2
sensor < 10 seconds
CO, H
2
S, SO
2
& NO
2
sensors < 15 seconds
All sensors All sensors shall have built-in control circuitry, including drive circuits,
memory, microprocessor, and analog to digital converter to all for sensor level
control and compensation.
Oxygen sensor Oxygen sensor shall be lead-free and use non-consumable chemical reaction.
Combustible sensor Combustible sensor must provide the following poison resistance at minimum:
 3000 ppm*hours to H
2
S

90 ppm*hours to silicone
CO/H
2
S sensor CO/H
2
S sensor shall be designed with extremely robust carbon filter for CO
channel to block interference. Sensor shall be designed for virtually no cross-
channel interference. Sensor shall be designed for two-toxic gas detection in the
same physical envelope as a single gas sensor.
CO/NO
2
sensor CO/NO
2
sensor shall be designed with extremely robust carbon filter for CO
channel to block interference. Sensor shall be designed for two-toxic gas detection
in the same physical envelope as a single gas sensor.
H
2
S/SO
2
sensor H
2
S/SO
2
sensor shall be designed to meet the measurement requirements for
lowered exposure limit guidelines for H
2
S. Sensor shall be designed for two-toxic
gas detection in the same physical envelope as a single gas sensor.
Advanced Display and Software Options
Industrial hygiene
displays
Instrument shall have capability of displaying PEAK, STEL and TWA at user’s
discretion. User shall have ability to enable/disable STEL and TWA functions.
Instrument settings
All settable instrument parameters (alarm set points, expected calibration gas values,
etc.) shall be protected by user-selectable password.
Reset of functions
User shall be provided with capability of resetting PEAK, STEL and TWA
readings in the field.
Measurement units
Unit shall be capable of displaying both types of installed gas sensors
and measurement units for each gas.
Instrument Alarms
MotionAlert
™
feature
Instrument shall offer MotionAlert feature. When activated, instrument shall
go into latch alarm when no instrument movement is detected for 30 seconds.
InstantAlert
™
feature
Instrument shall have InstantAlert feature to allow users to manually activate
all alarms if situation requires.
Visual alarms
Visual alarms shall consist of bright, flashing LEDs on top and bottom of
instrument and positive indication on unit’s display for alarm type identification.
Audible alarm Audible alarm shall be rated at > 95 dB @ 1 ft (30 cm).
Vibrating alarm Unit shall be offered with standard vibrating alarm.
LEL latching alarm
Combustible channel shall have non-resettable latching alarm when combustible
gas level exceeds 100% LEL or 5.00% CH
4
.
Oxygen alarms
Oxygen channel shall have alarm set points for both oxygen deficiency
and oxygen enrichment.
Alarm set points Alarm set points must be user-settable.
STEL and TWA alarm
Instrument shall provide audible, visual and vibrating alarms if STEL or TWA levels
are exceeded. User shall be able to select alarm set points for STEL and TWA.
Battery alarms
Instrument shall provide user with 10-minute warning of battery power loss in all
environmental conditions. Power consumption alarms shall activate audible, visual
and vibrating alarms.