Citizen CZ series User manual

CITIZEN CZ
series
Precision
B
alances

CZ [NTEP ] User’s Guide
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Contents
SECTION 1 INTRODUCTION………………………………………………………………1
SECTION 2 SPECIFICATIONS………………………………….…………………………2
SECTION 3 INSTALLATION……………………………………….……………..……….3
SECTION 4 KEY DESCRIPTIONS……………………………………..…………………4
SECTION 5 OPERATION…………………………………………….………………..…..5
5.1 Zeroin the display………………………………………….……………………..….5
5.2 Tarin …………………………………………………………..……………………..….5
5.3 Wei hin a sample………………………………………….…………………………5
5.4 Counter……………………………………………..…………….……………….…….5
SECTION 6 BATTERY OPERATION…………………………….……………..…………6
SECTION 7 PARAMETERS………………………………………….……….……………7
SECTION 8 APPENDIX…………………………………………….…………..…………9
9.1 Error code…………………..………………………………….………….…..……….9
9.2 Wei hin unit listin ………………………….……………..………….……………9
9.3 Explode drawin ………………………….………………………..…………………10
9.4 Parts list………………………….……………………….…..…….…….……………11

CZ Series Precision Balances service manual
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SECTION 1 INTRODUCTION
C T ZEN’S CZ series of Precision balances provides an accurate, fast and versatile
series of general purpose balances.
There are 10 models in this series, with capacities from 500g~6000g, resolution from
5,000 to 120,000.
They all have stainless steel weighing pan on an ABS base assembly.
All the keypads are light touch switches and the displays are large easy to read liquid
crystal type displays (LCD). The LCD’s are supplied with a white color LED backlight
and have loading bar graph.
All units include automatic zero tracking, and an accumulation facility that allows the
count to be stored and recalled as an accumulated total.

CZ Series Precision Balances service manual
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SECTION 2 SPECIFICATIONS
2.1 CZ series [ NTEP APPROVED ]
No NTEP
Model Capacity Pan size e d n max
1 CZ502 500 g 4.7” / 120 mm dia. 0.1 g 0.01 g 5000
2 CZ 501 500 g 4.7” / 120 mm dia. 0.1g 0.1 g 5000
3 CZ601 600 g 5.5 x 5.9 ” / 140 x 150 mm 0.1g 0.1 g 6000
4 CZ 602 600 g 4.7” / 120 mm dia. 0.1 g 0.01 g 6000
5 CZ 1202 1200 g 4.7” / 120 mm dia. 0.1 g 0.01 g 12000
6 CZ1200 1200 g 5.5 x 5.9 ” / 140 x 150 mm 0.1 g 0.1 g 12000
7 CZ5000 5000 g 5.5 x 5.9 ” / 140 x 150 mm 1 g 1 g 5000
8 CZ 5000H 5000 g 5.5 x 5.9 ” / 140 x 150 mm 1 g 0.1 g 5000
9 CZ6000 6000 g 5.5 x 5.9 ” / 140 x 150 mm 1 g 1 g 6000
10 CZ 6000H 6000 g 5.5 x 5.9 ” / 140 x 150 mm 1 g 0.1 g 6000
2.2 Common Specifications
Accuracy Class
nterface Optional RS-232 Output
Stabilisation Time 2 Seconds typical
Operating Temperature 10°C~25°C / 50°F~77°F
Power supply (external) 9V/800mA AC adapter or
built-in rechargeable battery
Calibration Automatic External
ADC Sigma delta
nternal counts 600,000 or 1,200,000
Display 15 mm digits high 6 digits LCD
with white color LED backlight
and loading bar graph
Balance Housing ABS Plastic, Stainless Steel pan
Overall Dimensions (wxdxh) 180mm x 220mm x 85mm
Gross Weight 2.6kg(include rechargeable battery)

CZ Series Precision Balances service manual
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SECTION 3 INSTALLATION
3.1 GENERAL INSTALLATION
The scales should be sited in a location that will not degrade the accuracy.
Avoid extremes of temperature. Do not place in direct sunlight or near air conditioning
vents.
Avoid unsuitable tables. The tables or floor must be rigid and not vibrate. Do not
place near vibrating machinery.
Avoid unstable power sources. Do not use near large users of electricity such as
welding equipment or large motors.
Avoid high humidity that might cause condensation. Avoid direct contact with water.
Do not spray or immerse the scales in water.
Avoid air movement such as from fans or opening doors. Do not place near open
windows.
Keep the scales clean.
Do not stack material on the scales when they are not in use.
3.2 INSTALLATION of CZ SERIES
Level the scale by adjusting the four feet. The scale should be adjusted such that the
bubble in the spirit level is in the centre of the level and the scale is supported by all
four feet. f the scale rocks readjust the feet.
Attach the adapter to the connector on the side of the scale. Please use the power as
the label.
For capacity lower than 600g model, it will attach with a wind shielding, the wind
shielding include one frame and one cover, put the frame on balance, then add cover.
When weigh something, remove the cover, put weight on the pan, then add cover.

CZ Series Precision Balances service manual
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SECTION 4 KEY DESCRIPTIONS
Zero or
Set the zero point for all subsequent weighing. The display shows zero.
A secondary function , of "Enter" key when setting parameters or other
functions.
Tare or
Tares the scale. 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.
ESC
PRINT
MULT Function.Key
Primary function (ESC) ,is to return to normal operation when the scale is in a
parameter setting mode. OPT ONAL To print the results to a PC or printer using the
optional RS-232 interface . [ N.A. ]
MODE
UNIT
This key will select either grams, pounds, carat ,ounce etc. for the weighing unit when
weighing mode.
A secondary function, change current value for parameters or other functions.
S
No function.
P
No function.
ON/OFF or
Use this key to turn on or turn off the power.

CZ Series Precision Balances service manual
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SECTION 5 OPERATION
5.1 ZEROING THE DISPLAY
You can press the ZERO key at any time to set the zero point from which all other
weighing and counting is measured, within 10% of power up zero. This will usually
only be necessary when the platform is empty. When the zero point is obtained the
display will show the indicator for zero.
The scale has an automatic rezeroing function to account for minor drifting or
accumulation of material on the platform. When the weight goes over 20 % of the full
capacity, “read zero” function is obsolete.
5.2 TARING
Zero the scale by pressing the ZERO key if necessary. The zero indicator will be on.
Place a container on the platform, a value for its weight will be displayed.
Press the TARE key to tare the scale. The weight that was displayed is stored as the
tare value and that value is subtracted from the display, leaving zero on the display.
The NET" indicator will be on. As product is added only the weight of the product will
be shown. The scale could be tared a second time if another type of product was to
be added to the first one. Again only the weight that is added after taring will be
displayed.
When the container is removed a negative value will be shown. f the scale was tared
just before removing the container this value is the gross weight of the container plus
all product that was removed. The zero indicator will also be on because the platform
is back to the same condition it was when the ZERO key was last pressed.
5.3 WEIGHING A SAMPLE
To determine the weight of a sample first tare the empty container then place the
sample in the container. The display will show the weight and the units of weight
currently in use.
5.4 COUNTER
5.4.1 Audit operation counter
Press S key durin selfcheckin , display will show Audit operation times
5.4.2 Calibration counter
Press P key durin selfcheckin , display will show calibration times
When counter full, it will back to 0 automatically.

CZ Series Precision Balances service manual
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SECTION 6 BATTERY OPERATION
When the battery needs change the indicator will turn on. Please change
battery or use AC adapter after this indicator on.
The scales can be operated from the battery if desired. The battery life is
approximately 50 hours.
To charge the battery simply plug into the mains power. The scale does not need to
be turned on.
The battery should be charged for 12 hours for full capacity.
n the LCD display has an battery indicator to indicate the status of battery charging.
When the scale is plugged into the mains power the internal battery will be charged.
When turn on the indicator, if the battery indicator is full then the battery has a full
charge. f it is half then the battery is nearly discharged and empty indicates the
battery should be charged.
As the battery is used it may fail to hold a full charge. f the battery life becomes
unacceptable then contact your distributor .

CZ Series Precision Balances service manual
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SECTION 7 PARAMETERS
NOTE: f the user wants to enter into the technical parameter, the jumper K1 on the
main board must be short firstly.
The scale has 8 parameters that can be set by the user plus a method of entering the
calibration section.
To set parameters press the MODE key during self checking
The display will show the first function, "F1 UNT".
Pressing the MODE key will cycle through the other functions.
Pressing ZERO key will allow you to set the function. Use the PR NT/ESC key to
leave a parameter unchanged.
Attached: When display shows “TECH”, press ZERO key to enter, display shows
“P N”, press S, PR NT, TARE key, and press ZERO key to enter technical parameters
setting mode.
Parameters table.
FUNCT ON
DESCR PT ON
F1 UNT Sets the which units want to use: g / ct / lb / oz / dr / ozt / dwt, use
MODE to switch (ON/OFF), use ZERO key to sure.
F2 Bl Set the backlight to be on, automatic or off,
EL on: EL backlight always on
EL Au: EL backlight automatically turn on
EL off: El backlight always off
Use MODE key to switch, use ZERO key to sure
F3 cal Normal calibrate
After enter cal mode, the display will show "unLoAd". Remove all
weight from the pan and wait for stable
After stable, balance will show load c, put put calibrate weight on
the pan, here is the useable weight list
Balance capacity 500g: calibration weight 500g
Balance capacity 600g: calibration weight 500g
Balance capacity 1200g: calibration weight 1000g
Balance capacity 5000g: calibration weight 5000g
Balance capacity 6000g: calibration weight 5000g
after stable, display will show pass, calibrate complete.
No need press any key during calibrate.
TECH Pin Enter the programming and calibration menus by entering the
correct password (S, Print, TARE) and press ZERO key to enter.

CZ Series Precision Balances service manual
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P1 LIN Liner calibrate
After you press ZERO key, display will show PIN again, press
PR NT, S, P key and ZERO key to enter, display will show UNLOAD,
remove all weight from the pan and wait until display show the
calibrate weight value.
After stable, balance will confirm the zero calibrate and show “
load
H”, load calibration weight on the pan,
Balance capacity 500g: calibration weight 250g
Balance capacity 600g: calibration weight 250g
Balance capacity 1200g: calibration weight 500g
Balance capacity 5000g: calibration weight 2500g
Balance capacity 6000g: calibration weight 2500g
After stable, balance will confirm the half span calibrate weight and
show :LOAD C , put the weight on pan,
Balance capacity 500g: calibration weight 500g
Balance capacity 600g: calibration weight 500g
Balance capacity 1200g: calibration weight 1000g
Balance capacity 5000g: calibration weight 5000g
Balance capacity 6000g: calibration weight 5000g
After stable, display will show “pass”, calibration finished
P2com Set RS-232
At first, select output type: S 232: RS-232, S USB: USB interface
Then output mode:
P p t connect with mini printer
P cont connect with remote display or PC
P auto connect with mini printer, auto print (auto accumulation)
After you select communication mode, display will show b xxx, this is
baud rate, you can select from 600/1200/2400/4800/9600bps,
f you select P p t or P auto(work with printer), after set baud rate,
display will show tp or LP-50, this is printer mode, you can select
normal mini printer (TP) or label printer (LP-50)
f you select LP-50, display will show ENG or CH , this is print out
language, you can select Chinese(CHI) or English (ENG)
Use MODE key to shift, use ZERO key to sure
P3 CNT This display will show xxxxxx for indicating the internal counts, you
can press Print key to escape
P4 AZN This option is used to select the auto zero maintain
Options : 0.2e, 0.4e, press ZERO key to sure, press PR NT key to
escape
P5 Cap Set the capacity.
You can find detail specification in page 2

CZ Series Precision Balances service manual
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SECTION 8 APPENDIX
9.1 ERROR CODES
During the initial power-on testing or during operation it is possible the scale may
show an error message. The meaning of the error messages is described below.
f an error message is shown repeat the procedure that caused the message, turning
the balance on, calibration or other functions. f the error message still is shown
then contact your dealer for further support.
ERROR CODE DESCR PT ON POSS BLE CAUSES
E 3 Calibrate weight error Use incorrect calibrate weight
E 4 nitial Zero is greater than
allowed (4% of maximum
capacity) when power is
turned on or when the
ZERO/ENTER key is
pressed,
Weight on the pan when turning the
scale on.
Excessive weight on the pan when
zeroing the scale.
mproper calibration of the scale.
Damaged load cell.
Damaged Electronics.
E 5 Keyboard Error. mproper operation of the scale.
E 6 A/D count is not correct
when turning the scale on.
Platform not installed.
Load cell damaged.
Electronics damaged.
E 17 Unstable Mode Tare or Zero Key Press Without
Stability [ Wait For Stability Sign]
9.2 WEIGHING UNIT LISTING
No Unit mark Unit name Conversion（g）
1 G Gram
2 Ct net carat =0.2g
3 Lb Lb =453.59237g
4 Oz Ounce =28.349523125g
5 D Dram =1.7718451g
6 Ozt troy ounce =31.1034768g
7 Dwt penny weight =1.55517384g

CZ Series Precision Balances service manual
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9.3 EXPLODE DRAWING

CZ Series Precision Balances service manual
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9.4 PARTS LIST
No Parts name qty material Spec
1 Wind shielding top cover 1 AL
2 toughened glass 1 2 glass 152.5x80x3t
3 pole for glass 4 AL
4 toughened glass 2 2 glass 138.5x80x3t
5 SST pan 1 SUS304 80/120
6 "+" screw 1 S18C M4x10, 6.8
7 plastic pan 1 ABS 80/120
8 SST cover 1 SUS304 0.5t
9 top cover 1 ABS
10 internal hexagon screw 4 M3x12,8.8
11 load cell shim 2 SUS304 16x13x1t
12 load cell upper bracket 1 ABS
13 battery 1 lead acid 6v/1.2Ah
14 self thread screw 10 S18C 3x8, 6.8
15 interface PCBA 1 RS232/USB
16 "+" screw 4 S18C M4x12, 6.8
17 load cell lower bracket 1 AL
18 bottom cover 1 ABS
19 Level bubble 1 14.7mm
20 key panel 1 PC
21 dislay PCBA 1
22 insulative washer 10 EDPM 8x3.1x1.5t
23 "+" screw 10 S18C M3x12,8.8
24 below weighing sheet 1
25 load cell 1 AL SPL
26 "+" screw 1 S18C M3x10, 6.8
27 "+" screw (big head) 1 SUS304 M3x12
28 Main PCBA 1
29 below weighing screw 1
30 "+" screw 4 S18C M4x12, 8.8
31 foot 1 2 ABS
32 foot 2 2 ABS