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Scott PORTABLE GAS DETECTION INSTRUMENT User Manual

Portable gas detection instrument
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MINI-SA PORTABLE
GAS DETECTION
INSTRUMENT
1

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Summary of Contents for Scott PORTABLE GAS DETECTION INSTRUMENT

  • Page 1 MINI-SA PORTABLE GAS DETECTION INSTRUMENT...
  • Page 2 INTRINSICALLY SAFE GAS LEVEL DETECTOR 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.

  • Page 3: Table Of Contents

    SCOTT INSTRUMENTS MINI-SA PORTABLE GAS DETECTION INSTRUMENT 1.0 INTRODUCTION ... 4 2.0 OPERATIONAL ENVIRONMENT ... 4 3.0 GENERAL INSTRUCTIONS ... 5 UNPACKING ... 5 REGISTRATION ... 5 BATTERY INSTALLATION ... 5 4.0 INSTRUMENT DESCRIPTION ... 6 ALARM LEGENDS ... 7 AUDIBLE ALARMS ...

  • Page 4: Introduction

    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.

  • Page 5: General Instructions

    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.

  • Page 6: Instrument Description

    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.

  • Page 7: Alarm Legends

    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”...

  • Page 8: Audible Alarms

    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...

  • Page 9: Vibration Alarm

    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.

  • Page 10: Switch Functions And Displays

    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”...

  • Page 11: Operating Instructions

    6.0 OPERATING INSTRUCTIONS Before using this instrument, read and understand ALL instructions for ALL operating modes described in this Section. Prior to use, the instrument should be checked for proper calibration as described in this Section. BEFORE EACH DAY’S USAGE, THE SENSITIVITY OF THE GAS SENSOR MUST BE TESTED ON A KNOWN CONCENTRATION OF CALIBRATION GAS.

  • Page 12: Instrument Turn On / Off

    6.1 INSTRUMENT TURN ON / OFF To turn the instrument ON, depress either pushbutton. Three successive “beeps” will sound. The Red LED will flash and the vibration alarm will pulse for each “beep.” The graphic display will show one of the following screens while the instrument initializes.
  • Page 13 sensor type has been changed or if the previous calibration was not suc- cessful, the bottom line of the display will show “CALIBRATION REQUIRED”. For Toxic Gases For O MENU In the normal Operating Mode, the following information is displayed: Gas concentration in either ppm (toxic Gas) or % (oxygen) Battery life indication Backlight prompt...

  • Page 14: Menu Selection

    6.2 MENU SELECTION From the Operating Mode screen, there are six menus that can be selected by the user. They are “ZERO CALIBRATION,” “SPAN CALIBRATION,” “PEAK/ HOLD,” “ALARM SETPOINT,” “TWA/STEL,” and “CONFIGURATION.” De- press the pushbutton below the MENU prompt on the display and then one of the following screens will appear: For Toxic Gases NEXT...
  • Page 15 NEXT To go to the PEAK/HOLD menu, depress the “SELECT” pushbutton. To go to the next menu, depress the left pushbutton below the “NEXT” com- mand and one of the following screens will be displayed: <gas> ALARM SETPOINT For Toxic Gases NEXT For O NEXT...
  • Page 16 CONFIGURATION NEXT SELECT To go to the CONFIGURATION menu, press the “SELECT” pushbutton. To go to the next menu, depress the left pushbutton below the “NEXT” com- mand and the ZERO CALIBRATION for toxic gas or AUTO CALIBRATION for oxygen screen will again be displayed. The MINI-SA will scroll repeatedly through these Menus each time the “NEXT”...

  • Page 17: Zero Calibration Menu

    6.3 ZERO CALIBRATION MENU The MINI-SA instrument can be Auto Zeroed at any time. An Auto Zero should only be performed in an area known to be free of toxic gas or any known cross sensitive materials. See Section 8.0 for SCOTT INSTRUMENTS sup- plied calibration gas cylinders.

  • Page 18: Span Calibration Menu

    6.4 SPAN CALIBRATION MENU FOR TOXIC GAS ONLY Note: The MINI-SA software requires that an “AUTO ZERO” be performed as described in Section 6.3 before the instrument will allow a “SPAN CALIBRA- TION”. Failure to do so will display the following screen when attempting a “SPAN CALIBRATION”...
  • Page 19 Calibration cylinders supplied by SCOTT INSTRUMENTS contain 25 PPM S or 50 PPM CO. To use another certified concentration, depress the left pushbutton below the “CHANGE” command. The one of the following screens will be displayed: For Toxic Gases GAS = <_> ppm <CALGAS> Factory preset span calibration gas values: CO = 50 ppm = 5.0 ppm...
  • Page 20 This screen will remain on until the instrument detects calibration gas. If no calibration gas is detected after thirty (30) seconds, the instrument will sound a single beep and return to the operating mode. Depressing the “EXIT” pushbutton will also return the instrument to normal operation with no calibration having occurred.
  • Page 21 Attach the hose of the Adapter to the calibration gas cylinder and begin flowing gas to the cap at a flow rate of 500 cc/min. (300 cc/min. for Cl instrument detects the gas, the display will change to one of the following screens: For Toxic Gases The display will count down <seconds>...

  • Page 22: Sensor Replacement Message

    Note: SCOTT INSTRUMENTS supplies Teflon®-lined tubing with all chlorine and ammonia calibration kits. Sticky gases such as chlorine and ammonia require this tubing be used for calibration. Using tub- ing of another type may inhibit the automatic calibration of a MINI-SA and lead to improper readings or a false failed sensor message.

  • Page 23: Peak / Hold Menu

    6.6 PEAK / HOLD MENU The MINI-SA can be set to display either the lowest and highest gas reading (PEAK) or just the highest toxic gas or lowest oxygen reading (HOLD) during use. To enter the PEAK/HOLD menu, depress the “SELECT” pushbutton when the PEAK/HOLD menu is displayed as described in Section 6.2.
  • Page 24 For Toxic Gases For O Current and peak readings update continuously while this screen is dis- played. If the PEAK menu is accessed from a peak reading display, the option “SHOW PEAK” will read “HIDE PEAK” instead, as follows: For Toxic Gases RESET PEAK For O...

  • Page 25: Hold

    NOTE: After an Alarm Condition occurs and the Audible Alarm is si- lenced as instructed in Section 4.0, the instrument will automatically change to the “SHOW PEAK” display to inform the user of the actual level responsible for the alarm condition. To return to the standard operating screen, depress the pushbutton under “HIDE PEAK,”...

  • Page 26: Alarm Setpoint Menu

    6.7 ALARM SETPOINT MENU The “ALARM SETPOINT” can be adjusted by the user in the ALARM SETPOINT menu within the following ranges: CO = 5 to 250 ppm = 0.1 to 10.0 ppm = 0.10 to 2.00 ppm HCN = 0.1 to 50.0 ppm S = 5 to 100 ppm = 5 to 100 ppm = 0.2 to 5.0 ppm...
  • Page 27 the “OK” pushbutton to return to the Operating Mode. To change the setpoint, depress the “CHANGE” pushbutton. One of the following screens will be displayed: <gas> ALARM SETPOINT For Toxic Gases For O HI ALARM = 23.5% LO ALARM = 19.5% For toxic gases, choose “UP”...
  • Page 28 For O LO ALARM = 19.5 % To raise or lower this setpoint, select the “UP” or “DOWN” command. For example, choose “DOWN” and the following screen will appear: For O LO ALARM = 19.5 % DOWN The % value will flash while this screen is displayed. Each time the “DOWN” pushbutton is depressed, the setpoint will be decreased by 0.1%.

  • Page 29: Twa / Stel Menu

    Depressing the “OK” pushbutton will display one of the following screens: For Toxic Gases LATCH For O LATCH The status of the alarms will be displayed as “NON-LATCHING” or “LATCHING”. Status can be changed by depressing the left pushbutton. Depress the “OK” pushbutton to leave the status as indicated. If neither pushbutton is selected, after fifteen (15) seconds the unit will automati- cally return to the Operating Mode with the new alarm setpoints in effect and the alarms at the status indicated.
  • Page 30 The STEL (Short Term Exposure Level) function measures the level of toxic gas during a fifteen (15) minute interval and alarms when the preset STEL value in parts per million is exceeded. The alarm levels are as follows: Ammonia Carbon monoxide Chlorine Chlorine Dioxide Hydrogen Cyanide...
  • Page 31 Depressing the “RESET” pushbutton will reset the TWA value, the STEL value, and time all to “0”. The instrument will automatically go back into the Operating Mode and begin collecting measurement data. The “DISABLE” pushbutton turns off the TWA/STEL functions. If the TWA/ STEL functions are off, one of the following screens will be displayed: <gas>...

  • Page 32: Configuration Menu

    6.9 CONFIGURATION MENU The CONFIGURATION menu of the SCOTT INSTRUMENTS MINI-SA pro- vides the user with the following two (2) optional features: • BATTERY SAVER mode can extend operational battery life to sev- eral hundred hours by turning off the instrument graphic display dur- ing normal non-alarm operation.

  • Page 33: Password Protection

    If an alarm condition occurs while in the BATTERY SAVER mode, the graphic display will come on automatically and remain on until the alarm is reset. After the alarm indication clears, the graphic display will remain on for thirty (30) seconds and then the display will go blank as described above. If the BATTERY SAVER mode had already been enabled , the graphic display will show the following: Depressing the “YES”...
  • Page 34 has been entered, the instrument will display the following screen: PASSWORD PROTECTION FOR ADVANCED MENUS TURN The MINI-SA is shipped from the factory with password protection off. The “TURN ON” pushbutton will bring up the following display: PASSWORD PROTECTION LOCK OUT ACCESS TO Pressing “NO”...
  • Page 35 Use the “UP” and “SET” push-buttons to enter the correct password. Enter- ing the incorrect password will display an INCORRECT PASSWORD mes- sage and allow the user to enter the password again. When the correct password has been entered, the instrument will display the following screen: PASSWORD PROTECTION FOR ADVANCED MENUS TURN...
  • Page 36 VERIFY NEW PASSWORD 5678 Note: If the pushbutton is not depressed within fifteen (15) seconds, the instrument will beep once and automatically go back to the oper- ating mode and the password will be unchanged. If you wish to change the password shown in the VERIFY NEW PASS- WORD screen, depress the “CHANGE”...

  • Page 37: Error Messages

    7.0 ERROR MESSAGES A SCOTT INSTRUMENTS MINI-SA INSTRUMENT THAT DISPLAYS ANY ERROR MESSAGE MUST BE REMOVED FROM SERVICE IM- MEDIATELY AND THE FAILURE DIAGNOSED AND REPAIRED BY AUTHORIZED PERSONNEL. DO NOT ASSUME THAT A PROBLEM HAS CORRECTED ITSELF IF A PREVIOUSLY DISPLAYED ERROR MESSAGE DOES NOT APPEAR A SECOND TIME.

  • Page 38: Calibration Gases

    SCOTT INSTRUMENTS Service Center for information regarding avail- ability of Calibration Gases and accessories for the SCOTT INSTRUMENTS MINI-SA Portable Gas Detection Instrument. Calibration eguipment from SCOTT INSTRUMENTS: Calibration Kits ( Including gas cylinder, regulator, cal adapter and tubing)

  • Page 39: Specifications

    9.0 SPECIFICATIONS HYDROGEN SULFIDE SPECIFICATIONS Range: 0 to 100 ppm (for H 0 to 500 ppm (for H Response Time: T90 < 30 seconds Operating Temperature Range: -40 to +50 (-40 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing...
  • Page 40 CARBON MONOXIDE SPECIFICATIONS Range: 0 to 500 ppm (for CO 500) 0 to 999 ppm (for CO 999) Response Time: T90 < 25 seconds Operating Temperature Range: -20 to +50 (-4 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing...
  • Page 41 SULPHUR DIOXIDE SPECIFICATION Range: 0.0 to 99.9 ppm Response Time: T90 < 35 seconds Operating Temperature Range: -20 to +50 (-4 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68...
  • Page 42 PHOSPHINE SPECIFICATIONS Range: 0.00 to 9.99 ppm Response Time: T90 < 30 seconds Operating Temperature Range: -20 to +50 (-4 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy:...
  • Page 43 CHLORINE SPECIFICATION Range: 0.0 to 99.9 ppm Response Time: T80 < 60 seconds Operating Temperature Range: -20 to +50 (-4 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy:...
  • Page 44 AMMONIA SPECIFICATIONS Range: 0 to 200 ppm Response Time: T90 < 150 seconds Operating Temperature Range: -25 to +30 (-13 to +86 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy:...
  • Page 45 CHLORINE DIOXIDE SPECIFICATION Range: 0.00 to 2.00 ppm Response Time: T80 < 60 seconds Operating Temperature Range: to +50 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy:...
  • Page 46 OXYGEN SPECIFICATIONS Range: 0.0 to 25.0% Response Time: T95 = 15 seconds Operating Temperature Range: -20 to +50 (-4 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 0 to 99% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy:...
  • Page 47 HYDROGEN CYANIDE SPECIFICATION Range: 100 ppm Response Time: T90 < 200 seconds Operating Temperature Range: to +50 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 15 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy: ±3% of Applied Gas...
  • Page 48 NITROGEN DIOXIDE SPECIFICATIONS Range: 150 ppm Response Time: T90 < 25 seconds Operating Temperature Range: -20 to +50 (-4 to +122 Graphic Display Temperature Range: -10 to +60 (+14 to +140 Operating Humidity: 0 to 90% RH, Non-Condensing Recommended Storage Temperature: 0 to 20 (32 to 68 Sensor Accuracy:...
  • Page 49 NOTES...
  • Page 50 ® 251 Welsh Pool Road EXTON, PA 19341 Telephone: (610)363-5450 • Fax: (610)363-0167 40014802 Rev. D 08/21/03 CN #3181...

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