Contech CT series User manual

PIECE COUNTING SCALES
INTRODUCTION
Contech CT series PIECE COUNTING SCALES use high precision strain gauges to measure
precisely the weight of an object to compute number of pieces.
Features:
** HIGH INTERNAL RESOLUTION 1/600000
** CAN STORE UNIT WEIGHT FOR 500 ITEMS.
** 3 BRIGHT LED DISPLAYS TO DISPLAY WEIGHT, UNIT WEIGHT AND
PIECES
** AUTOMATIC COUNT CALIBRATION MODE.
** SELECTABLE SAMPLE SIZE.
** RESETTABLE SET POINTS FOR CHECK COUNTING.
** NUMERIC KEYBOARD FOR EASY ENTRY OF UNIT WEIGHT/SAMPLES
** BI DIRECTIONAL RS232 INTERFACE.
** POWER SAVING MODE
** COMPARATOR FUNCTION WITH AUDIO INDICATION(BUZZER)
** OPTIONAL COMPARTOR WITH RELAY OUTPUTS.
** OPTIONAL IN BUILT BATTERY BACKUP.
** PRINT OUT OPTION WITH DATE/TIME , COUNT AND WEIGHT.
** MEMORY ADDITION AND RECALL FUNCTION.

INSTALLATION
1Unpacking:
Unpack the scale. Save the packing container for future use.
2Electrical requirements:
The scale requires very stable power. It works on 230V AC supply with PROPER EARTHING. The
power outlet used for the scale should not be shared with any other devices which draws current in
inconsistent manner like Airconditioner or refrigerator etc. Scales supplied with optional inbuilt
battery backup
3 Environmental requirements:
For best results, the scale should be placed on a level surface which is free from drafts. It should not
be exposed to direct sunlight or radiated heat. The scale should not be subjected to sudden ambient
temperature changes. Table used for scale should be sturdy and should not transmit vibration from
other equipments and free from the movement of people. No vibration producing equipment should
be operated on the same platform as scale.
4 Start up.
Power is supplied to the scale through a 2 pin dc adaptor supplied along with the scale. Connect the
adaptor to the scale to dc jack provided at the side of the scale. Connect the adaptor to an AC mains
outlet with proper earthing.
Scale goes through the self test and subsequently starts displaying weight
Press key to zero the weight, if required.

COUNTING SCALE KEYBOARD AND DISPLAY
SWITCHING BETWEEN ITEMS.
Scales have a memory of 500. Unit weights of 500 items can be stored in memory. Scales retain the
unit weight value even when it is switched off.
To switch between different items, Press item memory number and press to select.
For example to select memory no. 125,

Press and
SETTING UNIT WEIGHT THROUGH KEYBOARD
Unit weight can be either set through the keyboard or scale calculates it with known number of
samples.
For Unit weight entry, Press , Scale displays
Unit wt display indicates the current unit weight and pieces display indicates the memory no.
Use numeric keys to enter new unit weight. Press key to store new unit weight.
Press to quit without saving.
SETTING UNIT WEIGHT WITH KNOWN NO. OF SAMPLES
Scale calculates unit weight when known number of samples are on the pan.
Remove all items from the pan and make weight reading zero by pressing key.
Keep container on the pan , if required, and Press or key to zero the weight.
Put known number of samples on the pan.

Press key. Scale displays
Enter no of samples on the pan using numeric key pad.
Press key. Scale calculates the Unit Weight and displays on the Unit Wt. Display.
AUTOMATIC COUNT CALIBRATION MODE. (ACCM)
Scale is equipped with a facility to calculate unit weight by averaging over large number of samples
without actually counting large quantities manually.
Put known number of samples on the pan.
Press key. Scale displays

Press key again. Scale displays
Now scale is in automatic count calibration mode.
Enter no of samples on the pan using numeric key pad.
Press key. Scale calculates the Unit Weight and displays on the Unit Wt.
Display.
When scale is in ACCM mode, the piece nos display will be blinking.
Add more sample to the existing no to make number of pieces double the original quantity.
Wait for the weight to become stable. Scale recalculates the unit weight and displays on the Unit
weight display.
Repeat this procedure till desired number of samples are averaged.

Press key to quit ACCM mode.
HOLD FUNCTION
Weighing and counting can be held temporarily by using HOLD function.
Keep the key pressed for more than 3 sec. Scale will display
Press key to quit this mode.
GROSS/NET FUNCTION
Press key to switch between GROSS and NET weight function. To use this function,
Remove all items from the pan and make weight reading zero by pressing key.
Keep container on the pan , if required, and Press key to zero the weight.
Keep sample on the pan.
Press to switch between GROSS and NET weight mode.

When key is pressed. Scale returns to NET weight mode and container/tare weight will be
made zero ,
TARE/CONTAINER WEIGHT ENTRY
Tare or container weight can be entered directly, if, it is known to the user.
Keep a container with samples on the pan of the scale. It displays say,
Press key. Scale will display
Current container/tare weight will be displayed in the Unit Wt. Display area.

Press key to store Tare weight.
Scale enters NET weight mode, subtracts Container weight from the total weight and displays.
MEMORY FUNCTION ( M+ and MR)
No. of Pieces counted can be added to its respective memory and can be retrieved if required. For
eg.
Press key. Quantity 2114 will added to the memory , say memory 1

Press key again. Quantity 2114 will added to the memory 1
To Retrieve the accumulated total, Press key. It displays
For Clearing memory, , Press key. It displays

Immediately Press key, scale displays
Press key to clear Memory no. 1
Press key to quit.
RECALLING ENTIRE MEMORY.
For Recalling memory, Press key. Display shows
Press or key to recall all the stored value of memory.
TO CLEAR ENTIRE MEMORY , Press key, scale displays

Press key to clear all the memory.
Press key to quit.
CHECK COUNTING.
Scales can be used in check counting application, where user can set limits ( 1 or 2) for counting.
Once the set limit is reached, scale gives audio indication. 1 or 2 limits can be set based on the
requirement.
In case of Single limit, Once the set limit is reached scale emits beep sound.
In case of 2 limits, scale emits beep sound once the count is within the 2 set limits.
To set limits,
Press key for more than 3 seconds, Scale displays
It displays in Unit Wt. Display position, if set limit function is OFF. or
displays in Unit Wt. Display position, if set limit function is ON.

Press to turn this function ON or to turn this functon OFF.
If the LIMIT function is ON, Scale displays
It displays in Unit Wt. Display position, if SINGLE LIMIT is selected.
or displays in Unit Wt. Display position, if 2 LIMITS are selected.
Press to select 2 LIMITS or to select 1 LIMIT.
Scale further displays
It displays in Unit Wt. Display position, if Type1 is selected
Or in Unit Wt. Display position, if Type2 is selected

Press to select FTYPE2 or to select FTYPE1.
To understand FTYPE1 AND FTYPE2, pl. refer below.
Set Point 1:
User can set a weight any where in the range of the scale. Depending on the weight
on the pan, the following events occur. Buzzer will work only in case of models where buzzer
is provided.
Type Count < Set Wt. Count = Set Wt. Count > Set wt.
FTYPE1 Buzzer off Buzzer off Buzzer on
FTYPE2 Buzzer on Buzzer off Buzzer off
Set Point 2:
User can set two weights any where in the range of the scale. Depending on the
weight on the pan, the following events occur. Buzzer will work only in case of model where
buzzer is provided.
Type Count within Count = lower or Count is beyond
Set Limit Upper limit. the limits.
FTYPE1 Buzzer off Buzzer off Buzzer on
FTYPE2 Buzzer on Buzzer on Buzzer off
Scale futher displays,

Current First Limit is displayed in Pieces display position.
Use numeric key pad to change the limits.
Press to save.
If Limit is set to 2 ,Scale displays
Current second Limit is displayed in Pieces display position.
Use numeric key pad to change the limits.
Press to save.

FOR CHANGING DATE,TIME AND SERIAL NO.
Press key, the Scale displays
And displays
Use or to go through the 4 options
a) for Date entry
b) for Time entry
c) for Serial no. entry
d) for machine id entry
Select Option by pressing key.
Press to make it 0 or use OR keys to change
and press key to store the selected parameters. Press key to skip and go to
next entry.
In case of entry, use OR keys to change the blinking character.
Press to move right and to move left.

Press to save.
PRINT OPTION
Counting scales can be attached to a serial printer for your printing needs. Print
out can be programmed to suit most of the printing requirements. Printer must have a serial port and
baud rate of the balance and printer should be same. Set baud rate 2400 or 4800.
Press key to print weight through the serial port.
Printing option and patterns are controlled by 4 SETUP parameters. They are
a) : There are 4 options
i) - Press key to start printing weight and other
details programmed as per (b), (c) and (d) below.
ii) - Printing is initiated when the weight kept on the pan
becomes stable.
iii) - All the displayed weights are printed along with
other details programmed as per (b), (c) and (d)
below.
b) . Printer format. 5 printout formats are available.
- Count & weight.
- Serial no , weight and count
- Serial no, Date, weight and count.
- Serial no, Time, weight & count
- Serial no.,Date, Time weight & Count
c) Print type (Horizontal or Vertical)
i) –Horizontal
Details will be printed horizontally.

Sr.No. Date Time Weight Pcs
001 12.05.2010 13:25:00 2.354 kg 100nos
002 12.05.2010 13:27:05 2.323 kg 99 nos
ii) –Vertical
Details will be printed vertically in a slip form.
For ex. Sr.No. : 001
Date : 12.05.2010
Time : 13:25:00
Weight : 2.445 kg
Pcs : 100nos
Set the above parameters (a) to (d) to your requirements and effect printing. These
parameters are available in SETUP functions.
BIDIRECTIONAL RS-232 INTERFACE.
Bi-directional RS-232 interface is provided to communicate with peripheral
devices like computer, printer etc. The interface is provided through a nine pin D-type
connector provided. Connections are as below.
Pin 2 –RXD –Receive Data
Pin 3 - TXD –Transmit Data
Pin 7 –Ground.
The Serial data transmitted and received are in standard ASCII
mode - ASYNCHRONOUS , 8 BITS, NO PARITY, 1 STOP BIT.
Baud rate : 2400 OR 4800 SELECTABLE.
The data format for weight output is
<+/->WWWW.WWb <UU>bPPPPPPnos <CR><LF>
where WWWWWW.WW is the weight
PPPPPP - count
b –blank space - 20 hex (32 DEC)
CR- Carriage Return –0D hex( 13 DEC)
LF –Line feed - 0A hex (10 DEC)
UU –weighing unit ( for example kg)
The balance could be controlled by an external device like computer with the

following commands.
Z- Tares the balance. (Make weight and count reading zero)
T- Tares the balance. (Make weight and count reading zero)
W1 –Request for weighing and counting data
However scale can be operated in a continous data transfer mode when it will send data
continuously as it measures. This can be set using scale keyboard.
SETUP FUNCTIONS
SETUP functions control the basic operation of the SCALE. These parameters can be set by the user
to suit the requirements. The following are the parameters.
MENU NAME FUNCTION OPTIONS DESCRIPTION
Factory setting To select factory set parameters.
Baud rate setting To select 2400 baud rate
To select 4800 baud rate
Print modes set. Send stable weight through serial port
when key is pressed.
Send weight through serial port
Every time scale reading becomes
stable.
Send weight continuously.
Auto zero setting. Autozero disabled.
(Ability of the scale to remain Autozero to half accuracy of scale.
at zero, when there is no weight Autozero to full accuracy of scale.
on the pan. ) Autozero to twice the accuracy of scale.

- Auto calibration Autocalibration disabled
Autocalibration enabled
- Power saving mode Power saving mode disabled
Power saving mode enabled
- Third decimal mode. Third decimal mode disabled
Third decimal mode enabled
- Title printing Title printing disabled
Title printing enabled
- Select printing mode. Horizontal Printing mode
Vertical Printing mode
–Select print formats. - Count & weight.
- Serial no , weight and count
- Serial no, Date, weight and count.
- Serial no, Time, weight & count
- Serial no.,Date, Time weight & Count
.
- Select RS232 mode . Numeric mode
Standard mode
- Response Normal Response
Fast Response
–Select print formats. - Stability 0
- Stability 1
- Stability 2
- Stability 3