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Thermo GasTech HS-95, CO-95, OX-95 Operator's Manual

Personal portable gas monitor 95 series
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95 Series
Operator's Guide
Personal Portable Gas Monitor
HS-95, CO-95, OX-95

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Summary of Contents for Thermo GasTech HS-95, CO-95, OX-95

  • Page 1 95 Series Operator’s Guide Personal Portable Gas Monitor HS-95, CO-95, OX-95...
  • Page 2 TATEMENT Protected through use and/or registration in the United States and many foreign countries are the trademarks and service marks of Thermo GasTech. The use of the ® symbol indicates registration in the United States only; registrations may not have been issued at present in other countries. All other product names and logos are trademarks of their respective owners.
  • Page 3 ARNING HIS INSTRUMENT IS DESIGNED TO DETECT ONE OR MORE OF THE FOLLOWING FLAMMABLE VAPORS OXYGEN CONTENT OR TOXIC GAS AND TO GIVE WARNING BEFORE THEY REACH HARMFUL CONDITIONS IN ORDER TO ENSURE THAT IT WILL WARN OF DANGEROUS CONCENTRATIONS IT IS ESSENTIAL THAT THE INSTRUCTIONS IN THIS MANUAL PARTICULARLY THOSE CONCE RNING START UP...
  • Page 4 You may send the unit, prepaid, to: Thermo GasTech, 8407 Central Ave., Newark, CA 94560-3431, Attn.: Service Department. Enclose the copy of the RMA (Return Material Authorization) that was previously faxed to you.
  • Page 5 ARRANTY TATEMENT Thermo GasTech (the “Company”) warrants that the Products will operate substantially in conformance with the Company’s published specifications, when subjected to normal, proper, and intended usage by properly trained personnel, for a period of one (1) year after shipment to Customer (the “Warranty Period”).
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  • Page 7: Table Of Contents

    TABLE OF CONTENTS Chapter 1 INTRODUCTION..........1-1 OVERVIEW ............1-1 DESCRIPTION............1-1 SPECIFICATIONS ..........1-2 Chapter 2 PHYSICAL DESCRIPTION ......2-1 OVERVIEW ............2-1 PHYSICAL DESCRIPTION ........2-1 Electronics Assembly ......... 2-3 Buzzer ..............2-4 Housing/Housing Gasket ........2-4 Sensor ..............2-5 Battery Compartment..........
  • Page 8 Chapter 4 CALIBRATION & MAINTENANCE .... 4-1 OVERVIEW ............4-1 TEST KIT ..............4-2 Test Gas Cylinders..........4-2 H2S Regulator (for HS-95)......... 4-2 Dispensing Valve (for CO-95 and OX-95)..4-2 Flowmeter (for CO-95 and OX-95)....4-3 Test Cup.............. 4-3 Tubing..............4-3 Test Kit Instruction Sheet ........

  • Page 9: Chapter 1 Introduction

    INTRODUCTION CHAPTER OVERVIEW This Operator’s Guide provides information on the proper set-up, use, calibration, and maintenance of the 95 Series of single-gas monitoring instruments. Chapter 2 contains a physical description of your monitor. Instructions to use and interpret monitor readings are in Chapter 3, Start Up and Operation.

  • Page 10: Specifications

    95 Series Operators Guide SPECIFICATIONS Table 1-1 95 Series Gas Monitor Specifications Model Designation OX-95 (0-30.0% O in 0.1% increments) (Gases Detected) HS-95 (0-100 ppm H S in 1 ppm increments) CO-95 (0-500 ppm CO in 1 ppm increments) Detection Method Diffusion, electrochemical Response Time 90% in 30 seconds...

  • Page 11: Chapter 2 Physical Description

    PHYSICAL DESCRIPTION CHAPTER OVERVIEW This chapter describes the physical components of your 95 Series gas monitor. For purposes of identification throughout this guide, the monitor is described as having front and rear housing halves, as shown in Figure 2-1. PHYSICAL DESCRIPTION To open your monitor, loosen the two captive screws on the rear cover, then separate the two halves.
  • Page 12 95 Series Operator’s Guide (Hydrophobic Sensor Port membrane Buzzer Port behind grille) FRONT HOUSING HOUSING GASKET Operator Controls Cover Earphone Jack Cover ELECTRONICS ASSEMBLY: Display Board Display Cable Main Board Plug-in Buzzer Sensor Battery Compartment Zero Button Power Switch Span Button Earphone Jack REAR HOUSING Figure 2-1...

  • Page 13: Electronics Assembly

    Physical Description Electronics Assembly The electronics assembly consists of the main board, operator controls (power switch, buttons, and earphone jack), display board with liquid crystal display (LCD), and the display cable. If any of these components fail, contact the factory for repair. Main Board All buttons and operator controls are part of the main board.

  • Page 14: Buzzer

    95 Series Operator’s Guide Display Board/Display Cable The display board is attached to the main board by a nondetachable ribbon cable. Liquid Crystal Display (LCD) The LCD panel is visible through the window in the top of the housing. A red LED is visible through the display panel as a visual indication of alarm conditions.

  • Page 15: Sensor

    Physical Description Sensor Each model has a dedicated, detachable sensor that plugs into the main board. A hydrophobic (waterproof) membrane on the inside of the case sensor opening is held down by a gasket. The membrane permits diffusion of the surrounding atmosphere to the sensor.
  • Page 16 95 Series Operator’s Guide 71-0011 — REV E...

  • Page 17: Chapter 3 Start Up & Operation

    START UP & OPERATION CHAPTER OVERVIEW This chapter describes the normal operation of your 95 Series gas monitor, and how to respond to abnormal operation. Normal operation is any time that start up has been completed, and the monitor is not indicating an alarm, fault, or low battery condition. This chapter also contains interference charts listing other gases that can affect the sensor in the HS-95 or CO-95 monitor, and procedures to use the optional accessories available for your...

  • Page 18: Start Up

    95 Series Operator’s Guide START UP Perform the following steps to start up your monitor. Refer to Figure 2-1 as needed. CAUTION Perform start up only in a fresh air environment. Flip open the housing gasket flap that covers the operator controls, and move the power switch toward the sensor to turn the monitor on.

  • Page 19: Instrument Operation

    Start Up & Operation INSTRUMENT OPERATION In normal operation, your instrument monitors the environment and displays the current gas concentration. The instrument displays alarms to indicate gas concentrations outside preset limits. Low and dead battery as well as weak and failed sensor conditions are also indicated.

  • Page 20: Low Or Dead Battery Indications

    95 Series Operator’s Guide Recommended Action: When an alarm occurs, follow the established procedure for an alarm condition. If no procedure is in place, please establish one that is appropriate for your application. The alarm circuit is self-resetting. When the instrument is moved from the suspect environment, the alarm ceases, and the instrument returns to normal operation.

  • Page 21: Weak Or Failed Sensor Indications

    Start Up & Operation Weak or Failed Sensor Indications Weak sensor: When a weak sensor is detected during calibration, the word FAULT blinks on the LCD. The instrument is still functioning normally, but you should replace the sensor as soon as possible. Failed sensor: When a defective sensor or sensor circuit is detected, the word FAULT is displayed on the LCD.

  • Page 22: Interference Charts

    95 Series Operator’s Guide INTERFERENCE CHARTS Your HS-95 or CO-95 monitor can respond to gases other than S and CO. Tables 3-1 and 3-2 indicate the readings that can occur for specified concentrations of other gases. Table 3-1 HS-95 Interference Chart, H S Sensor Interfering Gas Concentration Tested...
  • Page 23 Start Up & Operation Table 3-2 CO-95 Interference Chart, CO Sensor Interfering Gas Concentration Tested Reading Acetylene 100 ppm No response Chlorine 7 ppm No response Hexane 4400 ppm No response Hydrogen 100 ppm 12 ppm Hydrogen sulfide 10 ppm No response* Methane 2.5%...

  • Page 24: Optional Accessories

    95 Series Operator’s Guide OPTIONAL ACCESSORIES This section describes the optional accessories available for your 95 Series gas monitor, and how to use them. Hand-aspirated Sample-draw Adapter Description The sample-draw adapter is used to draw a gas sample from a particular location.

  • Page 25: Earphone

    Start Up & Operation Earphone Description The earphone has an earpiece on one end, with a cord and adapter plug extending from it. The earphone repeats the audible alarms of your monitor. Since the earphone is in your ear during operation, you can hear the alarm in noisy environments.
  • Page 26 95 Series Operator’s Guide Note: Vibration should always occur with the audible buzzer and display light. If it does not vibrate, replace the battery. (see chapter 4 for maintenance). NOTE Close the earphone flap when the earphone or vibrating alarm is not in use.

  • Page 27: Overview

    CALIBRATION & MAINTENANCE CHAPTER OVERVIEW This chapter contains calibration instructions for all models of the 95 Series single-gas monitors. A troubleshooting guide, alarm setting procedures, and field replaceable unit (FRU) replacement procedures are also provided in this chapter. A part number list for FRUs and accessories is on the final page.

  • Page 28: Test Kit

    95 Series Operator’s Guide TEST KIT The test kits includes test gas cylinders, a regulator or dispensing valve and flowmeter, a test cup, and flexible tubing. The test kit is housed in a custom storage case. Test Gas Cylinders The test gas cylinder for the CO-95 contains 200 ppm of CO in air.

  • Page 29: Flowmeter (For Co-95 And Ox-95)

    Calibration & Maintenance Flowmeter (for CO-95 and OX-95) The ball in the flowmeter column indicates the flow rate of the gas from 0.2 to 2.0 standard cubic feet per hour (SCFH). The inlet is on the bottom and the outlet is on the top. Test Cup The test cup is a rubber cylinder that fits into the groove around the sensor port and is held in place by a retainer arm.

  • Page 30: Preparing For Calibration (All Models)

    95 Series Operator’s Guide Preparing for Calibration (all models) NOTE With a HS-95 or CO-95, if the battery has gone dead or the battery has been out of the instrument for 30 minutes or more, allow 1 hour after the new battery has been installed for the sensor to stabilize before beginning calibration procedures.
  • Page 31 Calibration & Maintenance • When you press and release the ZERO/- and SPAN/+ buttons at the same time, the mode changes. In the HS-95 and CO-95, the modes are: span calibration (C), set low gas alarm (L), set high gas alarm (H), set alarm delay (d), and normal.

  • Page 32: Calibration (Hs-95, Co-95)

    95 Series Operator’s Guide Calibration (HS-95, CO-95) Open the operator controls flap, and slide the power switch on (toward the sensor). Allow a few seconds for the instrument to stabilize. Make sure the instrument is in a fresh air environment, free of H S or CO gas.

  • Page 33: Calibration (Ox-95)

    Calibration & Maintenance Press and hold the SPAN/+ button. A high bar is displayed to the left of the gas reading during the automatic span calibration. Release the button when the PASS or FAIL message is displayed. The instrument returns to normal mode, with the alarm inhibited for 30 seconds.

  • Page 34: If Calibration Fails

    95 Series Operator’s Guide Press and hold the ZERO/- button. A low bar is displayed to the left of the gas reading during the automatic zero calibration. Release the button when the PASS or FAIL message is displayed. The instrument returns to normal mode, with the alarm inhibited for 2 minutes.

  • Page 35: Switch To Default Zero (Ox-95)

    Calibration & Maintenance For the HS-95 or CO-95, allow the new sensor to stabilize for 1 hour. For the OX-95, allow the new sensor to stabilize for 5 minutes. Turn the instrument on. Run the zero and span calibration procedures from the beginning.

  • Page 36: Return To Normal Operation

    95 Series Operator’s Guide Using the default zero value, the readings are approximate. You should recalibrate as soon as possible, using N gas for zero and fresh air for span. The reading with N may be several percent off zero until you press the ZERO/- button. Return to Normal Operation After calibration, return to normal operation.

  • Page 37: Maintenance

    Calibration & Maintenance MAINTENANCE This section contains troubleshooting and maintenance procedures, including procedures for alarm point adjustment. How to Open and Close Your Monitor To open your monitor, open both gasket flaps, then ensure that the power switch is off. Loosen the two captive screws on the rear housing, then separate the two halves.

  • Page 38: Troubleshooting Guide

    95 Series Operator’s Guide Troubleshooting Guide The following troubleshooting guide lists possible indications, probable cause, and recommended actions. Table 4-1 95 Series Gas Monitor Troubleshooting Guide Condition and Indication Recommended Action Probable Cause Blinking LOBAT Low battery. Less than Replace the battery. message.

  • Page 39: Changing Alarm Setpoints

    Calibration & Maintenance Changing Alarm Setpoints The 95 Series has two alarms, low and high, each with its own setpoint. The low alarm sounds when the reading is at or above the low setpoint for the CO-95 and HS-95. The high alarm sounds when the reading is at or above the high setpoint.

  • Page 40: Changing The Alarm Delay

    95 Series Operator’s Guide Changing the Alarm Delay The instrument can be programmed to delay the audible and visual alarm indications for a pre-determined time after a gas alarm setpoint has been exceeded. This feature prevents nuisance alarms caused by transient radio frequency interference (RFI). The alarm delay can be set from 0þ(noþdelay) toþ3 seconds (factory setting).
  • Page 41 Calibration & Maintenance Replacing the Sensor Open the instrument, then perform the following steps: Hold the monitor in one hand with your thumb on top of the buzzer. This holds the electronics assembly in place while you remove the sensor. Do not touch the main board during this process.
  • Page 42 95 Series Operator’s Guide Replacing the Instrument Battery WARNING To maintain approvals, use only Duracell PC1604 or Eveready EN22 batteries. Open the instrument, then perform the following steps: Lift the old battery from its compartment. Insert the new battery into the compartment. Make sure to align the positive and negative clips with the figure in the bottom of the battery compartment.
  • Page 43 2. Test the Vibrating Alarm using the Testing instructions. If The alarm does not vibrate after changing the batteries, contact Thermo GasTech for futher instructions Electronics Assembly Components The electronics assembly consists of the main board, power switch, buttons, earphone/vibrating alarm jack, liquid crystal display (LCD), and display cable.
  • Page 44 95 Series Operator’s Guide Housing Gasket O-ring (2) (Place thumb on buzzer when removing sensor) Plug-in Sensor 9V Battery Figure 4-1 95 Series Gas Monitor FRU Locations 4-18 71-0011 — REV E...

  • Page 45: Frus And Accessories List

    Calibration & Maintenance FRUs AND ACCESSORIES LIST Table 4-2 lists the field replaceable units (FRUs) and accessories for all 95 Series instruments. Table 4-2 95 Series Gas Monitor FRUs and Accessories Part No. Description 07-0080 Housing gasket 07-0090 Gasket, switch cover 07-6010 O-ring 13-0197...

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