Mopec MB1019 User manual

MOPEC USER MANUAL
VOLATILE ORGANIC COMPOUND (VOC) SENSOR - OPTION
MB1019

VOLATILE ORGANIC COMPOUND
(VOC) SENSOR
MB1019
TABLE OF CONTENTS
TABLE OF CONTENTS 2
INTRODUCTION 3
BACKGROUND ON OSHA AND FORMALDEHYDE/FORMALIN 3
SENSOR TYPE 3
PERFORMANCE 3
SENSOR DISPLAY 4
SENSOR ALERT LIMIT 4
SENSOR REPLACEMENT 5
NEW UNIT SETUP 6
QUICK START GUIDE 8
CALIBRATION POINT 8
ALARM POINT AND TIME CONSIDERATION 8
USER ADJUSTMENT OF ALARM POINT AND TIME ABOVE ALARM LIMIT 8
TIME ADJUSTMENT BASED ON SLOPE OF SENSOR OUTPUT 9
DISPLAY OF VOC SENSOR OUTPUTS, LIMITS, AND ALARMS 9
MAIN UI SCREEN 10
SETUP SCREEN (LAB MANAGER) 11
FACTORY CONFIGURE SCREEN 11
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INTRODUCTION
The purpose of the VOC sensor, is to detect OSHA limits of Formaldehyde, track time and
exposure and provide output so warnings can be given to the operator of the Grossing Station.
BACKGROUND ON OSHA AND FORMALDEHYDE/FORMALIN
1. https://www.osha.gov/OshDoc/data_General_Facts/formaldehyde-factsheet.pdf
2. Formaldehyde is a colorless, strong-smelling gas often found in aqueous (water based)
solutions. Commonly used as a preservative in medical laboratories and mortuaries,
formaldehyde is also found in many products such as chemicals, particle board,
household products, glues, permanent press fabrics, paper product coatings, fiberboard,
and plywood. It is also widely used as an industrial fungicide, germicide and disinfectant.
Although the term “formaldehyde” describes various mixtures of formaldehyde, water,
and alcohol, the term “formalin” is used to describe a saturated solution of formaldehyde
dissolved in water, typically with another agent, most commonly methanol, added to
stabilize the solution. Formalin is typically 37% formaldehyde by weight (40% by volume)
and 6- 13% methanol by volume in water. The formaldehyde component provides the
disinfectant effects of formalin.
SENSOR TYPE
1. The system utilizes two sensing elements that are comprised of a metal oxide
semiconductor layer formed on the alumina substrate of a sensing chip together with an
integrated heater. In the presence of detectable gas, sensor conductivity increases
depending on gas concentration in the air.
PERFORMANCE
1. The sensor will detect levels of Formaldehyde equivalent to
a. Range: 0.2 – 5.0 ppm +/- 15% in a (-)10’C to 50’C environment.
b. Two-point factory calibration at 0.0 and 2.0 ppm formaldehyde
2. The sensor has a warm up time to equalize the sensing environment
a. Warm up: 30 minutes
3. The sensor life is variable depending on exposure levels
a. Life: 1 year when exposure limits do not exceed 3.0 ppm
b. Life detection: 100-hour warning
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SENSOR DISPLAY
1. The sensor display output shows the following performance chart trendline after warm up
period.
Simulated sensor voltage just under alarm point
Alarm adjust set to 0%
Simulated sensor voltage just under alarm point
Alarm adjust set to 20%
2. Sensor trendline will show the trailing 15 minutes of data.
3. Extremely high levels (over 5.0 ppm) will go off the chart and can take up to 10 minutes
to return back to the normal operating range
SENSOR ALERT LIMIT
Sensor alert limit should be set by laboratory management here
1. Setup Screen (Lab Manager)
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2. WARNINGS:
a. VOC Temporarily inactive – performance data error due to warm up fault or
environmental condition being out of range below 0 deg C or above 70 deg C,
warm up resets allowed for 24 hours before faulting
b. Replace VOC sensor soon – sensing element within 100 hours of end of life
(warning: warn_sensor_eol)
c. Replace VOC – Life Exceeded – sensor 100-hour warning timer has expired
(Fault condition: fault_replace_voc)
SENSOR REPLACEMENT
1. Remove the (4) mounting screws using a Phillips screwdriver (shown below) on the
underside of the hood.
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2. Disconnect the ethernet cable
3. Unpackage the new sensor and connect the ethernet cable (P/N 7220)
4. Attach the (4) mounting screws.
5. Power up sensor to begin the warm up cycle.
6. Check for any Warnings listed on the user interface.
NEW UNIT SETUP
Use this section for setting up Fume Detection VOC sensor on an existing unit (This will already
be configured on factory-built units).
1. Turn on the unit. When the touch screen boots up click on the Settings button in the
upper left corner of the screen
2. Type in the factory access code “4 3 2 1 “
3. Verify fume detection options are turned ON under the factory tab:
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4. On initial start-up you should see the yellow icon displayed below that says “fume sensor
initializing”:
5. Under the diagnostics tab it will look like this when initializing/starting up.
a. NOTE: start-up could take up to 25 minutes.
6. After the start-up process is complete, the screen will look like this: Notice it now says
“Sample Normal” vs “Warmup” as previously shown during start-up. The sensor is now
functioning.
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QUICK START GUIDE
CALIBRATION POINT
1. The sensor will be calibrated with an atmosphere of 2 PPM formaldehyde.
2. Notes: This will assure if the reading is below 2 PPM that the formaldehyde is below the
OSHA limit.
ALARM POINT AND TIME CONSIDERATION
1. The software will set the 2 PPM level as the initial alarm point. The alarm indication will
be turned on if the VOC sensor voltage is at or above the 2 PPM level for a given time
period, which will be user (lab manager) adjustable. The software will initially set this
time limit at 15 minutes.
2. During the 15-minute period, if the sensor voltage drops below the 2 PPM equivalent
level for more than 30 seconds the 15-minute timer will be restarted at 0 minutes if and
when the voltage climbs above the 2 PPM equivalent level again.
3. If the sensor voltage drops below the 2 PPM equivalent for 30 seconds or less and then
climbs above the 2 PPM equivalent level the 15-minute timer will continue counting up
without a reset.
USER ADJUSTMENT OF ALARM POINT AND TIME ABOVE
ALARM LIMIT
The user (Lab Manager) may adjust the alarm point parameters to accommodate lab specific
preferences. It is anticipated that this adjustment would only be in an increased alarm value to
offset normally present VOC fumes.
1. The user offsets allowed shall be:
Alarm Point Alarm Time
Initial Value: 2 PPM Initial Value: 15 Minutes
Minimum Allowed: 0% Minimum Allowed: 1 Minute
Maximum Allowed: +40% Maximum Allowed: 60 Minutes
2. The adjustment for alarm point and time shall be accessible by the lab manager as
shown below.
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3. Set-up Screen (Lab Manager)
4. The increase in the alarm point and time will be applied until the lab manager re-adjust
the limits.
5. The alarm points and time considerations will be applied to the new offset values just as
they were previously applied to the 2 PPM equivalent value.
TIME ADJUSTMENT BASED ON SLOPE OF SENSOR OUTPUT
1. None
DISPLAY OF VOC SENSOR OUTPUTS, LIMITS, AND ALARMS
1. The display of the VOC will not change from the current implementation. It will show the
alarm limit as a horizontal dashed line at 2 PPM and a moving line to indicate current
VOC levels. This will allow the user to see if values are increasing or decreasing over
time.
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MAIN UI SCREEN
Simulated sensor voltage just under alarm point
Alarm adjust set to 0%
Simulated sensor voltage just under alarm point
Alarm adjust set to 20%
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SETUP SCREEN (LAB MANAGER)
FACTORY CONFIGURE SCREEN
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