CAS Scale EC-II - User Manual

Service Manual for EC-II counting scale
Ⅰ. Phenomena of trouble
1) Trouble of part
The trouble phenomena are as following:
a) Buzzer-----buzzer doesn’t make sound, or sometimes make sound and sometimes doesn’t make sound.
b) LCD-----The display is faultily.
c) Backlight-----The backlight doesn’t lighten, or sometimes it lighten and sometimes doesn’t lighten:
d) Key -----The key don’t work.
2) Trouble of load cell
The trouble phenomena are as following:
a) The display data is drifting.
b) The display data doesn’t change, or the internal resolution value is not in the natural range.
c) The internal resolution data drift badly.
d) The initial resolution is drifting.
3) Trouble of power supply
The phenomenon is as following:
The scale doesn’t work or the “low voltage” symbol comes out after turning on.
4) Trouble of the PCB
The phenomena are as following:
a) Trouble of display board-----the display is abnormal, or shows nothing.
b) Trouble of main board
 There is nothing in the display when turn on the scale.
 The scale can not be powered on.
 The weighing is unstable.
 The internal resolution is out of the normal range.
c) Trouble of RS-232 board-----The scale doesn’t transmit any data.

Summary

Phenomena of Trouble

Trouble of Part

Issues with individual components like buzzer, LCD, backlight, and keys.

Trouble of Load Cell

Problems related to load cell function, including data drifting.

Trouble of Power Supply

Covers scale power issues, such as failure to operate or low voltage warnings.

Trouble of the PCB

Addresses problems concerning the Printed Circuit Board, display, and main boards.

Troubleshooting Guide

Scale Fails to Power On

Flowchart for diagnosing and fixing power-on issues.

No Display After Power On

Steps to resolve issues where the scale display remains blank.

Keypad Unresponsive

Troubleshooting guide for keypad input errors and non-operation.

Inaccurate or Unstable Weighing

Procedures for identifying and correcting weighing inaccuracies or instability.

Incomplete or Exceptional Display

Steps to troubleshoot and resolve partial or abnormal display readings.

RS232 Data Transmission Failure

Diagnostic steps for problems with RS232 data transfer.

Calibration Procedures

Enter Calibration Mode

How to access the scale's calibration mode via self-checking.

Check Internal Resolution

Procedure to verify the scale's internal resolution status.

Configure Calibration Settings

Guide to selecting unit, resolution, accuracy, and capacity for calibration.

Select Unit Value

Steps for choosing the desired unit of measurement, e.g., kg, lb.

Select Resolution Value

Procedure to set the scale's resolution based on requirements.

Select Accuracy Value

Guide to setting the accuracy level for calibration.

Select Capacity

Steps for defining the maximum weighing capacity.

Set Zero Point

Instructions for establishing the zero point during calibration.

Enter First Calibration Value

How to input the first calibration weight value.

Enter Second Calibration Value

Guide to entering the second calibration weight value.

Enter Third Calibration Value

Steps for inputting the third calibration weight value.

Execute Calibration Mode

Operational steps for performing calibration after settings are configured.

Simple Calibration Without Weight

Access Simple Calibration

Method to enter simple calibration mode using a specific code.

Default Settings for Simple Calibration

Information on default settings and 1/3 capacity usage.

Perform Simple Calibration

Steps to place weight and confirm for simple calibration.

Modify Calibration Value

Instructions on how to adjust calibration values after initial setup.

CAS Scale EC-II Specifications

General

Display	LCD
Calibration	External
Interface	RS-232
Power	Rechargeable battery
Power Supply	AC adapter