Scott PORTABLE GAS DETECTION INSTRUMENT Manuel utilisateur
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MINI-SA PORTABLE
GAS DETECTION
INSTRUMENT
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INTRINSICALLY SAFE GAS
LEVEL DETECTOR
SCOTT INSTRUMENTS
EXTON, PA 19341
R
USC
39NO
CERTIFIED BY UNDERWRITERS LABORATORIES INC.
ONLY AS TO INTRINSIC SAFETY
FOR USE IN HAZARDOUS LOCATIONS
CLASS I, DIV, 1, GROUPS A, B, C, & D.
CERTIFIED TO CANADIAN CSA STANDARD C22.2 NO. 157-92
WARNING:
SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
USE ONLY WITH APPROVED BATTERIES.
TEMPERATURE CODE T3C.
CAUTION:
FOR SAFETY REASONS, THIS EQUIPMENT MUST BE
OPERATED AND SERVICED BY QUALIFIED PERSONNEL ONLY.
READ AND UNDERSTAND MANUAL BEFORE OPERATING AND SERVICING
CHANGE BATTERIES IN NON-HAZARDOUS AREA
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SCOTT INSTRUMENTS
MINI-SA PORTABLE GAS
DETECTION INSTRUMENT
Contents
1.0 INTRODUCTION ................................................................. 4
2.0 OPERATIONAL ENVIRONMENT ........................................ 4
3.0 GENERAL INSTRUCTIONS ............................................... 5
3.1 UNPACKING .......................................................... 5
3.2 REGISTRATION ..................................................... 5
3.3 BATTERY INSTALLATION ..................................... 5
4.0 INSTRUMENT DESCRIPTION ............................................ 6
4.1 ALARM LEGENDS ................................................. 7
4.2 AUDIBLE ALARMS ................................................ 8
4.3 VIBRATION ALARM ............................................... 9
4.4 ALARM LED LIGHTS ............................................. 9
4.5 STATUS LIGHT ...................................................... 9
5.0 SWITCH FUNCTIONS AND DISPLAYS ........................... 10
6.0 OPERATING INSTRUCTIONS ........................................... 11
6.1 INSTRUMENT TURN ON / OFF ............................ 12
6.2 MENU SELECTION .............................................. 14
6.3 ZERO CALIBRATION MENU ................................ 17
6.4 SPAN CALIBRATION MENU ................................ 18
6.5 SENSOR REPLACEMENT MESSAGE ................. 22
6.6 PEAK / HOLD MENU ............................................ 23
6.6.1 PEAK ............................................................. 23
6.6.2 HOLD ............................................................. 25
6.7 ALARM SETPOINT MENU ................................... 26
6.8 TWA / STEL MENU .............................................. 29
6.9 CONFIGURATION MENU ..................................... 32
6.9.1 BATTERY SAVER MODE ............................... 32
6.9.2 PASSWORD PROTECTION .......................... 33
7.0 ERROR MESSAGES ........................................................ 37
8.0 CALIBRATION GASES .................................................... 38
9.0 SPECIFICATIONS ............................................................ 39
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SCOTT INSTRUMENTS MINI-SA PORTABLE GAS DETECTOR
1.0 INTRODUCTION
The SCOTT INSTRUMENTS MINI-SA Portable Gas Detector is a self contained
instrument designed to detect and provide audible, visual, and tactile indication
of the presence of oxygen or toxic gas in the air. The toxic gas concentration is
monitored and shown in the graphic display in parts per million (ppm) of the
atmosphere. The oxygen concentration is shown in the graphic display as a
percent (%). When the gas level exceeds the preset level, alarms actuate
including a pulsing audible alarm tone, flashing LED, and a vibration alarm.
The alarm functions for toxic gases include a Time Weighted Average (TWA)
Alarm and a Short Term Exposure Level (STEL) Alarm.
Other features include AUTO CALIBRATION and self diagnostic capabili-
ties, a HOLD function that displays the lowest level detected, and user
adjustable high and low ALARM SETPOINTS. A battery life indicator con-
stantly monitors remaining battery capacity and a backlight provides visibil-
ity in low light situations.
Additional features include a PASSWORD PROTECT menu and a BAT-
TERY SAVER mode.
2.0 OPERATIONAL ENVIRONMENT
The SCOTT INSTRUMENTS MINI-SA Portable Gas Detector is designed to
be “INTRINSICALLY SAFE” suitable for operation in Class I, Division 1, Groups
A, B, C & D Hazardous Locations.
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3.0 GENERAL INSTRUCTIONS
3.1 UNPACKING
Remove the SCOTT INSTRUMENTS MINI-SA instrument from its packaging
and examine it for external damage. If any damage is found, notify your
SCOTT INSTRUMENTS distributor, sales representative, or the SCOTT IN-
STRUMENTS Service Department.
3.2 REGISTRATION
Fill out and mail the postage paid Registration Card provided. Registering
your SCOTT INSTRUMENTS MINI-SA instrument assures that you will re-
ceive notification of any future enhancements and/or upgrades that become
available. You may also register your instrument on SCOTT INSTRUMENTS
web site “www.scottinstruments.com”.
3.3 BATTERY INSTALLATION
The SCOTT INSTRUMENTS MINI-SA instrument is powered by two “AAA”
Alkaline batteries. Use only alkaline (Eveready Energizer Industrial EN 92,
Duracell PC2400, or Ray-O-Vac AL-AAA) batteries. Use of any other batter-
ies except those listed will void the intrinsic safety listing of the SCOTT
INSTRUMENTS MINI-SA Portable Gas Detector. Use of rechargeable batter-
ies is prohibited. Two of the specified “AAA” Alkaline batteries will provide
approximately one hundred (100) hours of continuous non-alarming opera-
tion before requiring replacement.
Install the batteries as follows:
1) Remove the battery cover by loosening the #1-phillips-head captive cover
screw counterclockwise, then lifting the cover out of the housing. Then
lift the two batteries from the housing, using a small coin or tool.
2) Install two (2) AAAAlkaline batteries of the specified type. Note polarity
orientation (+/-) as shown inside the battery box and push the batteries
securely in between the contacts.
3) Replace the battery cover by pushing it into the bottom detents and
secure by tightening the cover screw.
NOTE
The metal belt clip is designed to be removed from the instrument. After
removing the battery cover, remove the cover screw completely and slide
the clip out of the cover. Store the clip for future use. Replace the cover
screw and reattach battery cover to the instrument.
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4.0 INSTRUMENT DESCRIPTION
THE SCOTT INSTRUMENTS MINI-SA INSTRUMENT is designed for use as
a personal monitor. The MINI-SA is equipped with a snap mounting clip for
ease of use. A break-away neck strap and rubber boot are also available.
All operations of the instrument are controlled by two push-button actuators
which are large enough to accommodate use with gloved hands. In each
menu screen, “PROMPTS” over each push-button define their use.
The SCOTT INSTRUMENTS MINI-SA INSTRUMENT case is constructed of
high impact resistant, flame retardant plastic. The push-button actuators
and the graphic display overlay are UV and chemical resistant.
The Graphic Liquid Crystal Display (LCD) provides continuous readings of
gas concentration as well as battery life remaining and other information.
Alarm conditions are signaled by an alarm legend on the graphic display, an
audible tone, a flashing light, and an internal vibration. Audible tones for
certain alarms can be suspended for thirty (30) second intervals while oth-
ers will continue until the unit is reset in an atmosphere that corresponds to
the preset safe values. Alarms can also be configured to be latching or
nonlatching. Latching alarms operate until acknowledged. Nonlatching
alarms clear automatically when the detected gas is on the safe side of the
alarm setting.
MINI-SA INSTRUMENT
(w/ H2S Sensor shown for reference)
FIGURE 1
PUSHBUTTONS
LED
(GREEN OR RED
DEPENDING
SENSOR
GRAPHIC
BATTERY
MENU
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4.1 ALARM LEGENDS
The following alarm legends appear in the graphic display:
“ALARM” flashing legend indicates one of the following:
a) Gas concentration which exceeds the preset level
b) A Time Weighted Average (TWA) Alarm
c) A Short Term Exposure Level (STEL) Alarm.
For toxic gas, the ppm, TWA, or STEL level detected and the “ALARM”
legend will flash alternately.
A graphic battery level indicator appears continuously on the display screen.
The indicator shows battery capacity as ten (10) lines inside a picture of a
battery. Each line represents approximately 10% of battery time remaining.
The battery level indicator flashes when the batteries are low. This will occur
when approximately 10% of battery life remains.
EACH LINE REPRESENTS
APPROXIMATELY 10%
OF BATTERY TIME REMAINING
FIGURE 2
BATTERY LEVEL INDICATOR
An exhausted battery alarm will occur after the last bar disappears. See
Figure 2.
“HOLD ACTIVATED” flashing legend indicates that the HOLD feature has
been selected. The instrument will display the highest reading of a toxic gas
or the lowest oxygen reading. This reading will continue to be displayed until
the HOLD function is reset.
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4.2 AUDIBLE ALARMS
The SCOTT INSTRUMENTS MINI-SA has an audible alarm which is acti-
vated when any of the following conditions occurs:
- The preset gas alarm level is exceeded (ALARM)
- The Time Weighted Average (TWA) is exceeded
- The Short Term Exposure Limit (STEL) is exceeded
- The battery is exhausted
- The sensor is missing or incompatible
In addition, each time the instrument is turned ON, the audible alarm will
pulse three times.
The following describes the function of the Audible Alarm during the alarm
conditions listed above:
GAS ALARM – The Audible Alarm sounds when a gas concentration is de-
tected that exceeds the chosen alarm level, or when a TWA or STEL alarm
value is exceeded. A repetitive pulsing tone will occur at one (1) second
intervals while the alarm condition exists.
In the LATCHING alarm mode, selected in the Alarm Setpoint Menu, after an
alarm condition has cleared, the alarm indication will continue until the alarm
is acknowledged by depressing a pushbutton. In the NON-LATCHING alarm
mode, all alarm indications clear when the alarm condition clears. In either
mode, the instrument gives an “all clear” signal with three audible beeps,
three flashes of the Red Alarm Light, and three vibration pulses when the
alarm indication is cleared.
When an Audible Alarm sounds, depressing either pushbutton on the instru-
ment will silence the Audible Alarm for thirty (30) seconds. If the original
alarm condition still exists after the thirty (30) second silence period, the
Audible Alarm will sound again. The Audible Alarm can be silenced repeat-
edly by depressing a pushbutton.
LOW BATTERY – An Audible Alarm tone will pulse once every fifteen (15)
seconds to indicate when less than 10% of battery life remains.
MISSING SENSOR – The Audible Alarm for a missing or incompatible sen-
sor is identical to the pulsing one (1) second tone that occurs during an
ALARM condition. Depressing a pushbutton to acknowledge the condition
turns the unit OFF.
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4.3 VIBRATION ALARM
An internal vibrating motor activates whenever the Audible Alarm sounds. The
Vibration Alarm operates as a secondary alarm feature in high noise environ-
ments where the audible alarm may be difficult to hear.
The Vibration Alarm is reset the same as the Audible Alarm as described in
Section 4.2.
The Vibration Alarm will also pulse briefly whenever the MINI-SA instrument
is turned ON or OFF.
WARNING
THE VIBRATION ALARM DOES NOT FUNCTION FOR THE LOW BAT-
TERY INDICATION.
4.4 ALARM LIGHT
The SCOTT INSTRUMENTS MINI-SA instrument contains a Red Light Alarm
LED (Light Emitting Diode) which flashes whenever any Alarm Condition oc-
curs. It will continue to flash when the Audible Alarm is silenced and will flash
as long as the alarm condition is present. In the LATCHING alarm mode,
selected in the Alarm Setpoint Menu, after an alarm condition has cleared,
the alarm indication will continue until the alarm is acknowledged by de-
pressing a pushbutton. In the NON-LATCHING alarm mode, all alarm indica-
tions clear when the alarm condition clears. In either mode, the instrument
gives an “all clear” signal with three audible beeps, three flashes of the Red
Alarm Light, and three vibration pulses when the alarm indication is cleared.
4.5 STATUS LIGHT
The instrument also has a Green Status LED that flashes periodically, indi-
cating continuing instrument operation.
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5.0 SWITCH FUNCTIONS AND DISPLAYS
All operations on the MINI-SA Portable Detector are controlled by two push-
buttons located on the bottom of the unit. The operations vary depending on
the operating mode and the graphic display appearing above the two switches.
The unit sounds a brief audible “beep” whenever either pushbutton is de-
pressed while the instrument is on. Whenever the instrument is turned ON or
OFF, three successive audible tones will sound and the Red Alarm LED will
flash. The Green Status LED will flash once every fifteen (15) seconds during
instrument operation. When in the BATTERY SAVER mode, the Green Sta-
tus LED flash rate increases to once every five (5) seconds.
When the unit is in the operating mode, depressing the Display Backlight
Pushbutton will illuminate the graphic display for fifteen (15) seconds. A light
bulb icon for the Backlight is located above the pushbutton on the operat-
ing mode screen. Depressing the button again extinguishes the Backlight.
The Backlight is sustained ON or OFF while the MENU operations are in
progress, except for calibration. In an alarm condition, the Backlight flashes
for the duration of the alarm indication.
When in the BATTERY SAVER mode, the instrument graphic display will be
blank. Depressing either pushbutton will turn on the graphic display. The
display remains on for thirty (30) seconds after the last pushbutton opera-
tion.
WARNING
USE OF THE DISPLAY BACKLIGHT FOR EXTENDED PERIODS OF TIME
WILL REDUCE BATTERY SERVICE LIFE.
COMPONENT LOCATIONS
FIGURE 3
PUSHBUTTONS (2)
LED
(GREEN OR RED
DEPENDING
SENSOR
GRAPHIC
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