Electronic Analytical Weighing Balance operation SOP

1.0 OBJECTIVE:

To lay down the operating procedure of Electronic Analytical Weighing Balance CBK Series-8H Adam.

2.0 SCOPE:

This shall be applicable to the Electronic Analytical Weighing Balance CBK Series-8H Adam of Quality Control Instrument Laboratory.

3.0 RESPONSIBILITY:

3.1 Supervisor/ Machine operator.

3.2 Production Pharmacist.

4.0 ACCOUNTABILITY:

4.1 Manager-Production.

5.0 MATERIAL AND EQUIPMENT:

5.1 Electronic Analytical Weighing Balance CBK Series-8H Adam.

5.2 Sample.

6.0 PROCEDURE:

6.1 Operation:

6.1.1 Make sure that the balance/scale is already properly set up.

6.1.2 Level the scale by adjusting the four feet. The scale should be adjusted such that the bubble in the spirit level is in the center of the level and the scale is supported by all four feet.

6.1.3 Attach the power cable to the connection on the base on left of the scale. Plug in the power cable to the main

6.1.4 Switch on the power switch located on the base on the night side of the scale.

6.1.5 The scale will first display the software revision then run a self-test. At the end of the self-test it will display zero weight when a stable condition has been achieved.

6.1.6 Before performing weighing assures that, balance is calibrated.

6.1.7 Zero the scale by pressing the [Zero]. The zero indicator will be on. Place a container on the pan and its weight will be displayed.

6.1.8 Press [Tare] when the reading is stable.

6.1.9 After taring, place the sample in the container. The display will show the weight and the unit of weight currently in use.

6.1.10 Auto power off can be set by the user. So it will power off automatically.

6.1.11 Switch off the mains when the balance is not in use.

6.2 Precautions:

6.2.1 Install the balance on a vibration free place.

6.2.2 Check all the circuits before use.

6.2.3 If during or before weighing power supply fails, then recalibrate the balance.

6.2.4 Do not blow air into the chamber under any circumstances.

6.2.5 Never press or touch the weighing pan during weighing.

7.0 REVISION LOG:

Revision No.	Effective Date	Reason
00		New SOP

8.0 REFERENCES:

8.1 Not Applicable.

9.0 ANNEXURES:

Annexure 1: Overview of Display and Operating Elements

Annexure: 1

OVERVIEW OF DISPLAY AND OPERATING ELEMENTS

Overview of Display and Operating Elements

KEYS	PRIMARY FUNCTION	SECONDARY FUNCTION
[Zero]	Sets the zero point for all subsequent weighing. The display shows zero.	Escape from any setting menus
[Tare]	It tares the scale and stores the current weight in memory as a tare value, subtracts the tare value from the weight and shows the results. This is the net weight.	Accept the set values
[Unit]	This is used to select the weighing units from a preset list of available units.	Allows the weight, unit weight, and count to be seen when parts counting or to change from weight to % in percent weighing
[Low Limit] & [High Limits]	It sets the limits for check weighing and allows setting of either the low limit or the high limit or both.	None
[⟶Lim]	It stores and recalls any of 10 preset limits	None.
[Func]	This is used to select percent weighing,RS-232 parameters, Operation of the bar graph, RTC settings, User ID and Scale ID.	None.
[Count]	Enter Parts Counting	None
[Print]	It is used to print the results to a PC or printer using the RS-232 interface. It also adds the value to the accumulation memory if the accumulation function is not automatic.	None
[1] to [0] and [CE]	Allow entering numerical values where required, setting of limits, time and date for example.