To design a Standard Operating Procedure that describes the procedure for operation, maintenance, and calibration of a Hygrometer.
2.0 SCOPE
This Standard Operating Procedure (SOP) is applicable for the operation, maintenance, and calibration of Hygrometer.
3.0 RESPONSIBILITY
3.1 All personnel in the Microbiology and Animal House Facility shall be responsible for the implementation and compliance with the SOP.
3.2 Head/Scientists/Designees/Study Directors of the Microbiology and Animal House Facility shall be responsible to ensure the implementation and compliance with the SOP.
4.0 DISTRIBUTION
4.1 The Quality Assurance department is responsible to keep SOP ‘Master Copy’ approved through the Quality Assurance Head
4.2 The copy of ‘Control Copy’ of SOP is being distributed in the AHF department and placed near related Equipment/ Instrument as Display Copy.
5.0 DEFINITION(S)
5.1 Definition(s)
5.1.1 Thermometer and hygrometer units located throughout the animal facilities are used for the environmental monitoring of animal housing areas and areas used to store reagents, pharmaceuticals, biological samples, animal diets, or other substances that could affect the generation, measurement, or assessment of research data. These units are calibrated at least annually and this calibration is memorialized by a written label affixed to that unit.
6.0 ABBREVIATION(S)
6.1 Abbreviation(s)
6.1.1 SOP: Standard Operating Procedure
6.1.2 AHF: Animal House Facility
6.1.4 PPEs: Personal Protective Equipment
7.0 PROCEDURE
7.1 Introduction
7.1.1 LCD display of two lines of figures, indoor temperature and relative humidity are clear at a glance.
7.1.2 ˚C l˚F temperature display.
7.1.3 Relative degrees of humidity and comfort display.
7.1.4 Temperature and relative humidity Trend display.
7.1.5 Display the highest or lowest temperature and relative humidity, and it can clear and restore the memory of maximum/minimum.
7.1.6 It can be hung on the wall or be put on the desk.
7.2 Instrument description
7.2.1 Temperature measure range: -20-50˚C
7.2.2 Temperature resolution: 0.1 ˚C
7.2.3 Temperature accuracy: +1˚C
7.2.4 Humidity measure range: 10% - 95%RH
7.2.5 Humidity resolution: 1%
7.2.6 Humidity accuracy: 5%RH
7.2.7 Measuring period: 20 sec
7.2.8 Power: 1.5V (444 or 7# battery)
7.3 Button functions
7.3.1 “˚C/˚F” BUTTON: Selects between Centigrade (˚C) and Fahrenheit (˚F).
7.3.2 "MEMORY" BUTTON: Displays minimum and maximum temperature and humidity readings, and erases memory data.
7.3.3 Temperature:-Display C, measure the temperature the first time, and restore it in the memory.
7.4 Operations
7.4.1 Before using this product, please move away the cell door according to the indicative direction in the back of the clock, and take off the battery septa, lock the cell door, and then move away the protective plastic film on the LCD. Then this device can be used.
7.4.2 ˚C and ˚F display transform
7.4.3 You can change the display of ˚C and ˚F by pressing the 'ClT' button. The unit will change correspondently when the figure changes.
7.4.4 Max/Min temperature and humidity display
7.4.5 Press 'MEMORY" once, it displays both the max temperature and humidity from the memory and the icon MAX".
7.4.6 Press "MEMORY" again, it displays both the min temperature and humidity from the memory and the icon, MIN".
7.4.7 Press "MEMORY" again, and it returns to the current temperature and humidity.
7.4.8 Press "MEMORY" for 2 seconds, it can clear max/min temperature and humidity.
7.4.9 The degree of comfort display
7.4.10 When the temperature is between 20-26˚C (68-78.8˚F), the humidity is between 4O%-70%RH. The icon COM" displays, which means it's comfortable around.
7.4.11 When under any temperature, the humidity is higher than 70%RH, the icon " WET” displays, which means it's too wet around.
7.4.12 When under any temperature, the humidity is lower than 40%RH, the icon " DRY" displays, which means it's too dry around.
7.4.13 When the temperature is lower than 20˚C (68˚F) or higher than 26˚C(78.8˚F), the humidity is between 40%-70% RH, and there is no status of comfort displays.
7.4.14 Temperature and humidity trend indicators.
7.4.15 The temperature-trend and humidity trend indicators show the trends of collected readings. Arrows indicate arising, steady or falling trends.
7.5 Equipment calibration
7.5.1 Either the Facility Manager or a licensed subcontractor may perform the annual calibration and/or certification of thermometers and hygrometers.
7.5.2 Calibration must be performed using a certified NIST traceable standard or a new or recently
7.5.3 Certified unit that can be traceable to a NIST standard as a reference.
7.5.4 Each thermometer/hygrometer should be uniquely identified as to the room and/or area in which it is used. This can be done on the back of the unit with a label and/or permanent marker.
7.5.5 At least annually, and more often if a unit is suspected of being inaccurate, the Facility Manager, or their designee, collects all units in the facility and brings them to an area for evaluation, calibration, and certification. Units should be decontaminated prior to being removed from or placed in an animal room.
7.5.6 The units being evaluated and the reference standard unit is allowed a few minutes to equilibrate to the ambient room temperature and humidity.
7.5.7 Temperature and humidity for each unit being evaluated and the reference standard are recorded on the Thermometer/Hygrometer Calibration Record.
7.5.8 The Thermometer/Hygrometer Calibration Record includes the following information:
7.5.8.1 Date of calibration
7.5.8.2 Unit model number
7.5.8.3 Unit serial number
7.5.8.4 Location of unit
7.5.8.5 Temperature of unit
7.5.8.6 Temperature of standard
7.5.8.7 Percent difference of temperature from standard
7.5.8.8 Humidity of unit
7.5.8.9 Humidity of standard
7.5.8.10 Percent difference of humidity from standard
7.5.8.11 Traceable reference number of standard
7.5.8.12 Status determined (calibrated, rejected)
7.5.9 Units with temperature readings within + 5% and humidity readings within + 15% of the reference standard are considered to be within calibration limits and are certified and memorialized by a written label affixed to the unit.
7.5.10 Units with temperature readings > 5% or humidity readings > 15% of the reference standard are considered out of calibration and are replaced.
7.6 Maintenance
7.6.1 Clean units periodically by wiping them down with a mild disinfectant and a soft cloth.
7.6.2 Any additional maintenance/service should be performed by authorized personnel.
8.0 PRECAUTIONS
8.1 All PPEs like an apron, gloves, mask, head caps, and shoe cover should be worn before using the instrument.
8.2 Press Keys softly.
8.3 Clean the equipment with a dry piece of robe or a lightly moistened one, do not use organic solutions.
8.4 NEVER USE ABRASIVE PRODUCTS OR DISSOLVENTS.
8.5 NEVER pour water or liquids on the equipment.
8.6 Keep the device dry. ln case it wets, please wipe away the water in no time and dry it. The liquid including minerals may corrode the circuits inside.
8.7 Keep it clean on its surface; you can usually clean the surface of the device with a wet cloth. Do not use chemical reagent, cleanser or strong scour to clean.
8.8 If you change the circuits by yourself, the product may not work normally.
8.9 If it displays dismal, maybe the batteries have no charge, and please note the polarity of batteries when you charge the batteries.
8.10 When batteries are not in use for a long time, the batteries may leak to corrode the crust or lines. Used batteries can't be thrown away; please protect the environment.
9.0 REFERENCES
9.1 Reference
9.1.1 Refer to the manufacturer’s manual for additional information.
6.1.1 SOP: Standard Operating Procedure
6.1.2 AHF: Animal House Facility
6.1.4 PPEs: Personal Protective Equipment
7.0 PROCEDURE
7.1 Introduction
7.1.1 LCD display of two lines of figures, indoor temperature and relative humidity are clear at a glance.
7.1.2 ˚C l˚F temperature display.
7.1.3 Relative degrees of humidity and comfort display.
7.1.4 Temperature and relative humidity Trend display.
7.1.5 Display the highest or lowest temperature and relative humidity, and it can clear and restore the memory of maximum/minimum.
7.1.6 It can be hung on the wall or be put on the desk.
7.2 Instrument description
7.2.1 Temperature measure range: -20-50˚C
7.2.2 Temperature resolution: 0.1 ˚C
7.2.3 Temperature accuracy: +1˚C
7.2.4 Humidity measure range: 10% - 95%RH
7.2.5 Humidity resolution: 1%
7.2.6 Humidity accuracy: 5%RH
7.2.7 Measuring period: 20 sec
7.2.8 Power: 1.5V (444 or 7# battery)
7.3 Button functions
7.3.1 “˚C/˚F” BUTTON: Selects between Centigrade (˚C) and Fahrenheit (˚F).
7.3.2 "MEMORY" BUTTON: Displays minimum and maximum temperature and humidity readings, and erases memory data.
7.3.3 Temperature:-Display C, measure the temperature the first time, and restore it in the memory.
7.4 Operations
7.4.1 Before using this product, please move away the cell door according to the indicative direction in the back of the clock, and take off the battery septa, lock the cell door, and then move away the protective plastic film on the LCD. Then this device can be used.
7.4.2 ˚C and ˚F display transform
7.4.3 You can change the display of ˚C and ˚F by pressing the 'ClT' button. The unit will change correspondently when the figure changes.
7.4.4 Max/Min temperature and humidity display
7.4.5 Press 'MEMORY" once, it displays both the max temperature and humidity from the memory and the icon MAX".
7.4.6 Press "MEMORY" again, it displays both the min temperature and humidity from the memory and the icon, MIN".
7.4.7 Press "MEMORY" again, and it returns to the current temperature and humidity.
7.4.8 Press "MEMORY" for 2 seconds, it can clear max/min temperature and humidity.
7.4.9 The degree of comfort display
7.4.10 When the temperature is between 20-26˚C (68-78.8˚F), the humidity is between 4O%-70%RH. The icon COM" displays, which means it's comfortable around.
7.4.11 When under any temperature, the humidity is higher than 70%RH, the icon " WET” displays, which means it's too wet around.
7.4.12 When under any temperature, the humidity is lower than 40%RH, the icon " DRY" displays, which means it's too dry around.
7.4.13 When the temperature is lower than 20˚C (68˚F) or higher than 26˚C(78.8˚F), the humidity is between 40%-70% RH, and there is no status of comfort displays.
7.4.14 Temperature and humidity trend indicators.
7.4.15 The temperature-trend and humidity trend indicators show the trends of collected readings. Arrows indicate arising, steady or falling trends.
7.5 Equipment calibration
7.5.1 Either the Facility Manager or a licensed subcontractor may perform the annual calibration and/or certification of thermometers and hygrometers.
7.5.2 Calibration must be performed using a certified NIST traceable standard or a new or recently
7.5.3 Certified unit that can be traceable to a NIST standard as a reference.
7.5.4 Each thermometer/hygrometer should be uniquely identified as to the room and/or area in which it is used. This can be done on the back of the unit with a label and/or permanent marker.
7.5.5 At least annually, and more often if a unit is suspected of being inaccurate, the Facility Manager, or their designee, collects all units in the facility and brings them to an area for evaluation, calibration, and certification. Units should be decontaminated prior to being removed from or placed in an animal room.
7.5.6 The units being evaluated and the reference standard unit is allowed a few minutes to equilibrate to the ambient room temperature and humidity.
7.5.7 Temperature and humidity for each unit being evaluated and the reference standard are recorded on the Thermometer/Hygrometer Calibration Record.
7.5.8 The Thermometer/Hygrometer Calibration Record includes the following information:
7.5.8.1 Date of calibration
7.5.8.2 Unit model number
7.5.8.3 Unit serial number
7.5.8.4 Location of unit
7.5.8.5 Temperature of unit
7.5.8.6 Temperature of standard
7.5.8.7 Percent difference of temperature from standard
7.5.8.8 Humidity of unit
7.5.8.9 Humidity of standard
7.5.8.10 Percent difference of humidity from standard
7.5.8.11 Traceable reference number of standard
7.5.8.12 Status determined (calibrated, rejected)
7.5.9 Units with temperature readings within + 5% and humidity readings within + 15% of the reference standard are considered to be within calibration limits and are certified and memorialized by a written label affixed to the unit.
7.5.10 Units with temperature readings > 5% or humidity readings > 15% of the reference standard are considered out of calibration and are replaced.
7.6 Maintenance
7.6.1 Clean units periodically by wiping them down with a mild disinfectant and a soft cloth.
7.6.2 Any additional maintenance/service should be performed by authorized personnel.
8.0 PRECAUTIONS
8.1 All PPEs like an apron, gloves, mask, head caps, and shoe cover should be worn before using the instrument.
8.2 Press Keys softly.
8.3 Clean the equipment with a dry piece of robe or a lightly moistened one, do not use organic solutions.
8.4 NEVER USE ABRASIVE PRODUCTS OR DISSOLVENTS.
8.5 NEVER pour water or liquids on the equipment.
8.6 Keep the device dry. ln case it wets, please wipe away the water in no time and dry it. The liquid including minerals may corrode the circuits inside.
8.7 Keep it clean on its surface; you can usually clean the surface of the device with a wet cloth. Do not use chemical reagent, cleanser or strong scour to clean.
8.8 If you change the circuits by yourself, the product may not work normally.
8.9 If it displays dismal, maybe the batteries have no charge, and please note the polarity of batteries when you charge the batteries.
8.10 When batteries are not in use for a long time, the batteries may leak to corrode the crust or lines. Used batteries can't be thrown away; please protect the environment.
9.0 REFERENCES
9.1 Reference
9.1.1 Refer to the manufacturer’s manual for additional information.
END OF THE DOCUMENT
You may like to read these links:
1. List of In-vivo laboratory Vendors (Capex)
2. List of SOPs and Documents for CPCSEA
3. List of All SOPs and Documents for Laboratory Instruments and Equipment
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