Calibration of Digital Hygrometer, Purpose :
Calibration of Digital Hygrometer, This purpose of this SOP is to describe to operate of Hygrometer for the determination of temperature and humidity of Quality Control Laboratory, Microbiology Laboratory, and Product Development.
Calibration of Digital Hygrometer, Scope :
This procedure is applicable for the determination of room temperature and humidity by digital hygrometer used in Quality Control Laboratory, Microbiology Laboratory, and Product Development of XXP Pharmaceuticals Ltd.
Definitions/Abbreviation:
N/A
Responsibilities:
The roles and responsibility is as follows
Officer/Executive/Sr. Executive, Quality Control
To ensure that the instructions of this procedure are correctly followed
Manager, Quality Control
[][]To ensure that SOP is kept up to date.
[][]To ensure appropriate personnel from the section are trained on this procedure.
[][]To confirm that the SOP is technically sound and reflects the required working practices.
Head of Quality Assurance
[][]To ensure the overall implementation of the SOP.
[][]Approval of SOP
Procedure:
Precaution(s):
[][]Keep the sensor’s protective cap closed to extend the sensor’s life when the meter is not in use.
[][]Do not use for cleaning abrasive or solvents on these instruments.
[][]Do not store or use the meter outside the operating/storage environment.
[][]Allow time to stabilize the meter, when moving from one temperature/humidity extreme to other.
Operation:
[][]Check the calibration sticker to ensure that the instrument is within due date of calibration.
[][]Remove the RH sensor protective cap before use.
[][]Press Power button to turn the meter on.
[][]Setting Time-of-Day:
[][]Slid the CLOCK SET switch, located on the back of the unit to the CLOCK SET position
[][]Press HR and MIN button to set the hours and minutes respectively;
[][]Press and hold the button to rapidly advance the display.
[][]Setting 12/24 Hour Display:
[][]Slide the 12HR/24HR switch, located on the back of the unit to the desired position. In 12 hour format, “AM/PM” will appear on the display.
Selecting °C or °F:
[][]To display the temperature reading in Celsius or Fahrenheit, slide the °C/°F switch, located on the back of the unit, to the desired position.
Viewing the Humidity Memory:
[][]To view the humidity memory, press the HUMIDITY MEMORY button. The maximum humidity reading achieved will be displayed (“MAX” will appear on the display)
[][]Press the HUMIDITY MEMORY button a second time, within 10 seconds, to view the minimum humidity achieved (“MIN” will appear on the display)
[][]Press the HUMIDITY MEMORY button a third time, within 10 seconds, to return the current reading.
Clearing the humidity memory:
The maximum and minimum humidity memory may be cleared individually. To clear the desired humidity memory (MIN or MAX), press the CLEAR button while the memory value is being displayed (follow 7.1.7 to view the Humidity Memory)
Viewing the Temperature Memory:
[][]To view the temperature memory, press the TEM MEMORY button. The maximum temperature reading achieved will be displayed in the middle display (“MAX” will appear to the right of the value);
[][]The minimum temperature reading achieved will be displayed in the top display (“MIN” will appear to the right of the value);
[][]Press the TEM MEMORY button a second time, within 5 seconds, to return the current temperature and time-of-day display.
Clearing the humidity memory:
[][]To clear the temperature memory (MIN and MAX), press the CLEAR button while the memory value is being displayed (follow 7.1.9 to view the temperature Memory)
[][]Use annexure-I for recording of temperature and relative humidity, and use annexure-II for recording of temperature only as per requirements.
Calibration Procedure:
[][]Check the temperature and humidity using a digital thermo hygrometer and record the temperature and humidity in the calibration certificate. as per Annexure-V of Engineering.
[][]Calibrate the digital hygrometer once in a year ± 15 days.
Maintenance:
[][]If Humidity meter shows any mechanical, electrical or any others problem, inform to the supplier or
Engineering Department for maintenance.
Annexure
Annexure-I : Temperature and Humidity Record Sheet
Annexure-II : Temperature Record Sheet