BW Technologies GasAlertQuattro 3, GasAlertQuattro 2, GasAlertQuattro 1, GasAlertQuattro 4 Operator's Manual

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1, 2, 3, and 4-Gas Detector

Operator’s Manual

Page 2

GasAlertQuattro

Introduction

The operator’s manual provides basic information to operate the GasAlertQuattro gas detector. For complete operating instructions, refer to the GasAlertQuattro Technical Reference Guide provided on the CD-ROM. The GasAlertQuattro gas detector (“the detector”) is designed to warn of hazardous gas levels above user-defined alarm setpoints.

The detector is a personal safety device. It is your responsibility to respond properly to the alarm.

The detector is shipped with English as the default

displayed language. Additional languages provided

are French, German, Portuguese, and Spanish. The

screens for the additional languages are displayed on

the detector and in the corresponding operator s

manual.

Note

Zeroing the Sensors

To zero the sensors, refer to steps #1-3 in Calibration on page 8.

Safety Information - Read First

Use the detector only as specified in this operator’s manual and the technical reference guide, otherwise protection provided by the detector may be impaired. Read the following Cautions before using the detector.

Cautions

• Warning: Substitution of components may impair Intrinsic

Safety.

• Before using the detector, refer to Sensor Poisons and Contaminants.

• Protect the combustible sensor from exposure to lead compounds, silicones, and chlorinated hydrocarbons. Although certain organic vapors (such as leaded gasoline and halogenated hydrocarbons) may temporarily inhibit sensor performance, in most cases the sensor will recover after calibration.

• Caution For safety reasons, this equipment must be operated and serviced by qualified personnel only. Read and understand the technical reference guide completely before operating or servicing.

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GasAlertQuattro

Operator’s Manual

• Charge the detector before first-time use. BW Technologies by Honeywell recommends the detector be charged after every workday.

• Calibrate the detector before first-time use and then on a regular schedule, depending on use and sensor exposure to poisons and contaminants. BW recommends that the sensors must be calibrated regularly and at least once every 180 days (6 months).

• Calibrate only in a safe area that is free of hazardous gas in an atmosphere of 20.9% oxygen.

• The combustible sensor is factory calibrated to 50% LEL methane. If monitoring a different combustible gas in the % LEL range, calibrate the sensor using the appropriate gas.

• Only the combustible gas detection portion of this instrument has been assessed for performance by CSA International.

• BW recommends that the combustible sensor be checked with a known concentration of calibration gas after any exposure to contaminants/poisons such as sulfur compounds, silicon vapors, halogenated compounds, etc.

• BW recommends to bump test the sensors before each day’s use to confirm their ability to respond to gas by exposing the detector to a gas concentration that exceeds the alarm setpoints. Manually verify that the audible, visual, and vibrator alarms are activated. Calibrate if the readings are not within the specified limits.

• Caution High off-scale LEL readings may indicate an explosive concentration.

• Any rapid up scaling reading followed by a declining or erratic reading may indicate a gas concentration beyond upper scale limit, which can be hazardous.

• For use only in potentially explosive atmospheres where oxygen concentrations do not exceed 20.9% (v/v).

• Extended exposure of the GasAlertQuattro to certain concentrations of combustible gases and air may stress the detector element that can seriously affect its performance. If an alarm occurs due to a high concentration of combustible gases, a calibration should be performed, or if needed, the sensor replaced.

• Warning: The lithium battery (QT-BAT-R01) may present a risk of fire or chemical burn hazard if misused. Do not disassemble, heat above 212°F (100°C), or incinerate.

• Warning: Do not use any other lithium batteries with the GasAlertQuattro detector. Use of any other cell can cause fire and/or explosion. To order and replace the QT-BAT-R01 lithium battery, contact BW Technologies by Honeywell.

• Warning: Lithium polymer cells exposed to heat at 266°F (130°C) for 10 minutes can cause fire and/or explosion.

• ec Warnin g: This instrument contains a lithium polymer battery. Dispose of used lithium cells immediately. Do not disassemble and do not dispose of in fire. Do not mix with the solid waste stream. Spent batteries must be disposed

of by a qualified recycler or hazardous materials handler.

• Keep lithium cells away from children.

• Deactivating the detector by removing the battery pack may cause improper operation and harm the detector.

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Parts of the GasAlertQuattro

Item Description Item Description Item Description Item Description

Confidence/compliance

indicator (green LED)

Visual alarm indicator

(red LED)

Hydrogen sulfide

(H2S) sensor

Pushbutton

Combustible (LEL)

sensor

Carbon monoxide

(CO) sensor

Liquid crystal display

(LCD)

Audio alarm

Oxygen (O2) sensor

GasAlertQuattro

Alligator clip

Battery pack

Charging connector and IR interface

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GasAlertQuattro

Operator’s Manual

Screen Elements

Calibration gas cylinder

Bump test gas cylinder

Indicates pass for startup, sensors, calibrations, and bump tests

Indicates fail for startup, sensors, calibrations, and bump tests

Pushbutton displays when screen provides an option to end or skip

Displays when the Stealth option is enabled

Display during startup to indicate audio and visual alarm pass or fail during a MicroDock II bump test

Displays during an operation such as charging or autozeroing

Displays when the most recent calibration failed but a previous calibration is still valid within the calibration due interval

Reading displays with white background during normal operation

Reading displays with black background when the sensor is in alarm

Displays when the detector is in alarm (not applicable to TWA and STEL)

Displays when there is a warning, failure, error, or low battery

Heartbeat pulses continually during normal operation to verify the detector is operating correctly

Displays for STEL alarms and setpoints

Displays for TWA alarms and setpoints

Displays when maximum concentration encountered during work shift displays

Displays if calibration is initiated and the IR Lock option is enabled

Displays during calibration and when startup is complete

Battery — full charge

Battery — half charge

Low battery warning

Displays when the detector is connected to an IR Link

Grey check box displays during bump tests or calibration when a gas is not due

Displays when the detector’s ﬁ rmware is being updated

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Pushbutton

Pushbutton Description

• To activate the detector, press and hold C in a safe area that is free of hazardous gas and

in an atmosphere of 20.9% oxygen.

• To deactivate the detector, press and hold C during the powering off countdown. Release

C when OFF displays.

• To view the date/time, current battery power, calibration due date, bump test due date,

TWA, STEL, and peak readings, press C twice rapidly. To clear the TWA, STEL, and peak readings, press C when the LCD displays Hold C to reset peaks, TWA, STEL.

• To initiate calibration, press and hold C while the detector performs the OFF countdown. Continue holding C while the LCD briefly deactivates and then reactivates to begin the calibra ion countdown. Release C when Calibration started displays.

• To activate the backlight, press C and release.

• To acknowledge latching alarms, press C.

• To acknowledge a low alarm and disable the audible alarm, press C. The Low Alarm Acknowledge option must be enabled in Fleet Manager II.

• To acknowledge any of the “due today” messages (calibration and bump test) press C. If enabled, the force calibration and force bump features cannot be bypassed.

GasAlertQuattro

Pushbutton

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GasAlertQuattro

Operator’s Manual

Sensor Poisons and Contaminants

Several cleaners, solvents, and lubricants can contaminate and cause permanent damage to sensors. Before using cleaners, solvents, and lubricants in close proximity to the detector sensors, read the following caution and table.

Caution

Use only the following BW Technologies by Honeywell recommended products and procedures

• Use water based cleaners.

• Use non-alcohol based cleaners.

• Clean the exterior with a soft, damp cloth.

• Do not use soaps, polishes, or solvents.

The following table lists common products to avoid using around sensors.

Cleaners and

Lubricants

Brake cleaners

Lubricants

Rust inhibitors

Window and glass cleaners

Dishsoaps Mold releasing agents

Citrus based cleaners

Alcohol based cleaners

Hand sanitizer

Anionic detergents

Methanol (fuels and antifreezes)

Silicones Aerosols

Silicone cleaners and protectants

Silicone based adhesives, sealants, and gels

Hand/body and medicinal creams that contain silicone

Tissues containing silicone

Polishes

Bug repellents and sprays

Lubricants

Rust inhibitors

Window cleaners

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Connecting the Gas Cylinder to the Detector

GasAlertQuattro

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GasAlertQuattro

Operator’s Manual

Calibration

Calibration is performed to adjust the sensitivity levels of sensors to ensure accurate responses to gas.

This calibration procedure is written as the procedure is intended. If an error or alarm screen displays, refer to Calibra ion Troubleshooting in the GasAlertQuattro Technical Reference Guide.

a Caution

Calibrate only in a safe area that is free of hazardous gas in an atmosphere of 20.9% oxygen.

If performing single gas calibration, calibrate O

Note

The maximum hose length for calibration is 3 ft. (1 m).

The following steps are written for use with a standard quad gas cylinder.

Calibration can only be aborted after the sensors have been zeroed. If C is pressed to abort, CALIBRATION cancelled displays.

1. Press and hold C as the detector performs the Powering off countdown.

first.

Continue holding C when OFF displays and the detector briefly deactivates.

2. The detector activates again and performs the calibration countdown. Continue holding until Starting Calibration displays.

3. The detector enters the zero function. zeroing displays while the detector zeros all of the sensors.

Caution

If a sensor fails to zero, it cannot be calibrated. Refer to Startup Self-Test Troubleshooting in the

GasAlertQuattro Technical Reference Guide.

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If the IR Lock option is enabled, the following screen displays to indicate calibration can only be performed using an IR device (MicroDock II or

R Link).

4. When the following screen displays, attach the calibration cap and apply calibration gas at a flow rate of 250-500 ml/min. Refer to

Connecting the Gas Cylinder to the Detector.

If a sensor is not yet due for calibration, its box will have a greyed out checkmark.

5. The detector initially tests for gas. When a sufficient amount of

gas is detected, displays beside each gas that is detected.

6. The detector then begins calibrating the sensors. The following activities occur during the span:

• calibrating displays at the bottom of the screen.

• Gas values adjust during the span.

• Target gas values that are defined in Fleet Manager II display above or below the adjusting gas value.

To abort calibration after the sensors have been zeroed, press C.

7. When the following screen displays, close the valve on the gas cylinder and remove the calibration cap from the detector.

A check mark displays beside each sensor that has calibrated successfully.

GasAlertQuattro

Calibration

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GasAlertQuattro

Operator’s Manual

8. When calibration is complete, the following screen displays.

Note

The calibration due date cannot be reset for a sensor that fails calibration. If a sensor fails or an error screen displays, refer to Calibration Troubleshooting in the GasAlertQuattro Technical Reference Guide.

9. All successfully calibrated sensors automatically reset to the number of days defined in the Cal Interval field in Fleet Manager II.

The calibration due dates can be changed in Fleet Manager II.

10. The detector now enters normal operation.

Bump Test

A bump test applies test gas to force the detector into alarm. A bump test must be performed regularly to confirm the sensors are responding correctly to gas, and that the audible, visual and vibrator alarms activate during an alarm condition.

BW recommends to bump test the sensors before each day’s use to confirm their ability to respond to gas by exposing the sensors to a gas concentration that exceeds alarm setpoints.

1. Connect the calibration hose to the 0.5 l/min regulator

on the gas cylinder. Refer to Connecting the Gas Cyl-

inder to the Detector.

To bump test using the MicroDock II station, refer to the MicroDock II User Manual.

2. Connect the calibration hose to the intake inlet on the

calibration cap. Arrows on the calibration cap indicate the direction of gas flow.

3. Attach and tighten the calibration cap onto the

detector and apply gas. Verify the visual, audible, and vibrator alarms activate.

4. Close the regulator and remove the calibration cap.

The detector temporarily remains in alarm until the gas clears from the sensors.

Caution

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GasAlertQuattro

Alarms

Refer to the following table for information about alarms and corresponding screens. For more information about alarms refer to the GasAlertQuattro Technical Reference Guide.

Alarm Screen Alarm Screen

Low Alarm

• Slow siren (upward tone)

• Slow flash

• Black box around gas flashes

• Vibrator alarm activates

High Alarm

• Fast siren (downward tone)

• Fast flash

• Black box around gas flashes

• Vibrator alarm activates

TWA Alarm

• Fast siren (downward tone)

• Fast flash

• Black box around gas flashes

• Vibrator alarm activates

STEL Alarm

• Fast siren (downward tone)

• Fast flash

• Black box around gas flashes

• Vibrator alarm activates

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GasAlertQuattro

Operator’s Manual

Alarm Screen Alarm Screen

Multi Alarm

• Alternating low and high alarm siren and flash

• Black box around gas flashes

• Type of alarm alternates

• Vibrator alarm activates

Over Limit (OL) Alarm

• Fast siren (downward tone)

• Fast flash

• Black box around gas flashes

• Vibrator alarm activates

Note: LCD may also display an under limit reading (-OL)

Sensor Alarm

• displays

If enabled, during an alarm condition the Latching Alarms option causes the low and high gas alarms (audible, visual, and vibrator) to persist until the alarm is acknowledged by pressing C and the gas concentration is below the low alarm setpoint. The peak concentration values display continually until the alarm no longer exists. Enable/disable Latching Alarms in Fleet Manager II. Local regulations may require the Latching Alarms option be enabled.

Normal Deactivation

• Sequence of alternating beeps and alternating flashes

• Vibrator alarm activates

• Countdown initiates

• OFF displays

Note

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Alarm Screen Alarm Screen

Low Battery Alarm

• Sequence of 10 rapid sirens and alternating flashes with 7 seconds of silence in between (continues for 15 minutes)

• flashes

• Vibrator alarm pulses

• After 15 minutes of the low battery alarm sequence, the detector enters critical battery alarm (see Critical Battery Alarm below)

Critical Battery Alarm

• Fifteen minutes after low battery alarm activates, sequence of 10 rapid sirens and alternating flashes with 1 second of silence in between (sequence reactivates seven times)

• Vibrator alarm pulses

• Low Battery Powering Off displays and the detector deactivates

GasAlertQuattro

Alarms

Confidence Beep

• One beep every 1-120 seconds (beep frequency is defined with Confidence Beep Interval option)

Confidence Flash

(default: one flash every 1 second)

• One flash every 1-120 seconds (flash frequency is defined with

Confidence Flash Interval option)

Heartbeat

• pulses once every second to verify detector is operating correctly

Note

If the Low Alarm Acknowledge option is enabled, the audible alarm can be disabled during a low alarm condition. The LED and visual alarm indicators remain active until the alarm condition changes or the detector deactivates. Press C to acknowledge the low alarm and deactivate the audible alarm. If the alarm escalates to a high, TWA, or STEL alarm, the audible alarm reactivates.

Note: Confidence beep and confidence flash automatically disables during a low battery alarm.

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GasAlertQuattro

Operator’s Manual

User Options and Sensor Configuration

The following items are required to modify the user options and sensor configuration:

• Detector

• IR Link adapter or MicroDock II

• Fleet Manager II software

Refer to the GasAlertQuattro Technical Reference Guide and Fleet Manager II Operator s Manual for complete information.

Maintenance

To maintain the detector in good operating condition, perform the following basic maintenance as required.

• Calibrate, bump test, and inspect the detector on a regular schedule.

• Maintain an operations log of all maintenance, bump tests, calibrations, and alarm events.

• Clean the exterior with a soft damp cloth. Do not use solvents, soaps, or polishes. Refer to Sensor Poisons and

Contaminants.

Battery Pack Retaining Screw

The retaining screw (QAQD-20x) provided with the detector must be used to lock the battery pack on all European and

ECEx scheme detectors, and on all Canadian and U.S. Zone

Certified detectors.

A hex tool is required to tighten and loosen the retaining screw. Tighten the screw 1-2 turns using 3-4 in-lbs of torque. Do not overtighten the screw.

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Charging the Lithium Battery

a Warni ng

To avoid personal injury and/or damage to the detector, adhere to following

Charge only in a safe area that is free of hazardous gas within temperatures of 32°F to 104°F (0°C to 40°C).

Charge the battery immediately when the detector emits a low battery alarm.

Charge the lithium battery pack using the BW supplied charger and charger adapter only. The charging adapter is specific to your region. Use of the charging adapter outside your region will damage the charger and the detector. Failure to adhere to this caution can lead to fire and/or explosion.

Charge the lithium battery after each workday.

Change the lithium battery pack only in safe area that is free of hazardous gas.

1. Press and hold C to deactivate the detector, then

plug the charger into an AC outlet.

Note

The time required to charge will increase if the detector is activated.

GasAlertQuattro

Maintenance

2. Connect the charging adapter to the detector IR receptacle. Refer to the following illustration.

3. The lithium battery may require 6 hours to reach full capacity.

Replacing the Lithium Battery

1. Press and hold C to deactivate the detector.

2. Loosen the retaining screw if required. Push the battery release latch toward the top of the detector to release the battery pack.

3. From the top of the battery pack, lift upward to remove.

4. Insert a fully charged battery pack. Insert the bottom of the battery pack first, then lower the top into place. Press until the release tab engages. Tighten the retaining screw if required.

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GasAlertQuattro

Operator’s Manual

Replacing the Alkaline Batteries

a Warni ng

To avoid personal injury and/or damage to the detector, use only BW recommended alkaline batteries. Refer to

Specifications

Change the alkaline batteries only in safe area that is free of hazardous gas.

1. Press and hold C to deactivate the detector.

2. Loosen the retaining screw if required. Remove the

alkaline battery pack. Refer to steps #2

ing the Lithium Battery.

3. Unhook the ejector bar from the release clasp. Pull the tab on the ejector bar up and then move the ejector bar left and right to release the batteries. Remove the spent batteries.

4. Push the ejector bar down until the release clasp engages.

5. Insert the new batteries. Position the positive end of the battery at a 30° angle and insert into the battery pack before pushing the negative end down. Ensure the batteries are not inserted over the tab.

6. Replace the battery pack by inserting the bottom first, then lower top into place. Ensure the tab is tucked in before replacing the battery pack.

sPress until the release tab engages. Tighten the retaining screw if required.

-3 in Replac-

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Replacing the Sensors

GasAlertQuattro

Maintenance

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GasAlertQuattro

Operator’s Manual

a Warni ng

To avoid personal injury and/or property damage, only use sensors that are specifically designed for the detector.

Detectors that are configured for 1, 2, or 3 gases may contain a dummy sensor in one of the four sensor locations.

To replace a sensor or sensor filter, refer to the illustration

Replacing the Sensors

1. Press and hold C to deactivate the detector. Press

the release latch, and remove the battery pack.

2. Remove the six machine screws from the rear shell.

3. Remove the front shell.

4. Remove the spent sensor(s). Ensure no damage occurs to the LCD.

5. Insert the new sensor(s).

6. Reassemble the detector. Press the front and rear shells together firmly to ensure a proper seal. Ensure the front and rear shells have a tight, uniform 1/16 in. (1.5 mm) seal on all sides of the detector.

7. Replace the six machine screws using 3-4 in. lbs torque. Do not overtighten the screws. Replace the battery pack.

8. New sensors must be calibrated prior to use. Calibrate the new sensor(s) immediately. Refer to

Calibration

Note

and the following steps #1-8.

Replacing the Sensor Filter

To replace the filter, refer to the illustration Replacing the Sen-

sors and the following steps #1-6.

1. Press and hold C to deactivate the detector. Press

the release latch, and remove the battery pack.

2. Remove the six machine screws from the rear shell.

3. Remove the front shell. Remove the sensor filter.

4. Refer to the following illustration before inserting the new filter. Ensure the filter is laying flat and that the holes are correctly aligned over the filter posts.

5. Replace the front shell. Press the front and rear shells together firmly to ensure a proper seal. Ensure the front and rear shells have a tight, uniform 1/16 in. (1 mm) seal on all sides of the detector.

6. Replace the six machine screws using 3-4 in. lbs torque. Do not overtighten the screws. Replace the battery pack.

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Specifications

Instrument dimensions 12.9 x 8.0 x 3 8 cm (5.1 x 3.2 x 1.5 in.)

Weight 317 g (11.2 oz.)

Operating temperature -20°C to +50°C (-4°F to +122°F)

Storage temperature -40°C to +60°C (-40°F to +140°F)

Operating humidity 10% to 100% relative humidity

(non-condensing)

Dust and moisture ingress IP66/67 (with screw engaged)

Alarm setpoints May vary by region and are user-defined

Detection range

S: 0 - 200 ppm (1 / 0.1 ppm increments)

CO: 0 - 1000 ppm (1 ppm increments) O

: 0 - 30.0% vol. (0.1% vol. increments)

Combustible (LEL): 0 - 100% (1% LEL increments) or 0 - 5.0% v/v methane

Sensor type

S, CO, O2: Single plug-in electrochemical cell

Combustibles: Plug-in catalytic bead

measuring principle Capillary controlled concentration

sensor

Bump test specified limits BW recommends using a gas cylinder that will ensure the combustible sensor has an accuracy of -0 to +20% of actual reading

Alarm conditions TWA alarm, STEL alarm, low alarm, high alarm, multi alarm, over limit (OL) alarm, low battery alarm, critical low battery alarm, confidence flash, confidence beep

Audible alarm 95 dB at 30 cm (12 in.) variable pulsed beeper

GasAlertQuattro

Specifications

Visual alarm Red light-emitting diodes (LEDs)

Confidence flash Green light-emitting diode. Flash

frequency is user-defined with confidence flash interval option

Confidence beep Audible beep from variable pulsed beeper. Beep frequency is user-defined with confidence beep interval option

Display Alphanumeric liquid crystal display (LCD) with flip display (0° or 180°) capability (user-defined in Fleet Manager II)

Backlight Activates upon startup and deactivates when selftest is complete. Activates when the pushbutton is pressed and deactivates after 10 seconds. Also activates during an alarm condition and remains lit until alarm ceases

Internal vibrator Vibrates during activation, deactivation, and all alarms

Self-test Initiated during activation, self-test runs continuously while detector is operational

Calibration Zero and automatic span

User options Startup message, lockout on self-test error, safe

mode, confidence flash, confidence beep, latching alarms, force calibration, force bump, calibration IR lock, flip display stealth mode, datalog interval, confidence flash interval, confidence beep interval, and language selection

Sensor options Sensor enable/disable, calibration gas values, calibration interval, bump test interval, alarm setpoints (low/high/TWA/STEL), STEL interval, TWA period, auto zero at startup enable/disable, LEL correction factor, 10% (of reading) over-span, low alarm acknowledge, O measurement, %vol methane measurement

Year of manufacture The detector's year of manufacture is determined from the serial number. The second and third num-

measurement, LEL gas

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GasAlertQuattro

Operator’s Manual

ber after the second letter determines the year of manufacture. E g., QA109

Approved lithium battery for GasAlertQuattro product Lithium-ion polymer (QT-BAT-R01) as per standards UL913, EN60079-11, EN60079-0, C22.2 No. 157

Rechargeable battery (QT-BAT-R01) Temperature code

Lithium polymer -20°C ≤ Ta ≤ +50°C T4

Lithium battery operating time One rechargeable lithium polymer battery provides the following operating runtimes:

20 hours at 20°C (68°F) 18 hours at -20°C (-4°F)

Approved alkaline battery pack for GasAlertQuattro (QT-B AT-A01) as per standards UL913, EN60079-11,

EN60079-0, C22 2 No. 157

-001000 = 2009 year of manufacture

Approved alkaline batteries for GasAlertQuattro product

Duracell MN1500 -20°C ≤ Ta ≤ +50°C T4 (129 9°C) Energizer E91VP -20°C ≤ Ta ≤ +50°C T3C (135 3°C)

AA Alkaline battery operating time

14 hours at 20°C (68°F)

Battery charger Charging adapter

First-time charge 6 hours

Normal charge 6 hours

Warranty 2 years including sensors

Approvals

Approved by CSA to both U.S. and Canadian Standards CAN/CSA C22.2 No. 157 and C22.2 152 ANS/UL - 913 and ANSI/ISA - S12.13 Part 1

CSA Class I, Division 1, Group A, B, C, D ATE X CE 0539 g II 1 G Ga Ex ia IIC T4 for Zone 0

IECEx Ga Ex ia IIC T4 IECEx CSA 09 0006

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules and ICES-003 Canadian EMI requirements. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Group IIC KEMA 09 ATEX 0137 EN 60079-0, EN 60079-11, EN 60079-26

IEC 60079-0, IEC 60079-11, IEC 60079-26

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for

help.