Salter Brecknell PS500 User Manual

PS-500 SCALE

Operation Manual

Contents subject to change without notice

Version 1.0

2006-01-10

Declarations of compliance

United States

This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interfere nce to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at
his own expense.

Canada

This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus set out in the Ra dio Interference Regulations
of the Canadian Department of Communications.

’

Le présent appareil numérique n
les limites applicables aux appareils numériques de la Classe A prescrite s dans
le Règlement sur le brouillage radioélectrique edicté par le ministère des
Communications du Canada.

émet pas de bruits radioélectriqu es dépassant

Warnings

Electrical installation

For your protection, all mains (11 0V or 230V) equipment used

where damp or w e t conditions may occur, must be supplied from a

correctly fused source and protected by an approved ground fault prot ection

device (RCD, GFCI etc.).

IF IN DOUBT SEEK ADVICE FROM A QUALIFIED
ELECTRICIAN.

To avoid the possibility of electric shock or damage to the machine,
always isolate from the mains power supply before carrying out any
routine maintenance.

Cleaning the scale

Harsh abrasives, solvents, scouring cleaners and alkaline cleaning
solutions, should not be used especially on the display win dows. Under
no circumstance s should you attempt to wipe the inside of the machine.

The outside of the machine may be wiped down with a clean cloth
moistened with water containing a small amount of liquid soap.

EMC compliance

The following warning may be applicable to your machine.
WARNING: This is a class A product. In a domestic environment

this product may cause radio interference in which case the user
may be required to take adequate measures.

CONTENT

Ⅰ. SPECIFICATIONS. ……………………………………………… P1
Ⅱ. KEY FUNCTION. ……………………………………………… P3
Ⅲ. CALIBRATION. ………………………………….……………… P6
Ⅳ. Examination mode………………………………………………… P9
Ⅴ. SETUP MODE. …………………………………………………… P11
Ⅵ. Details of RS232 Communication………………………………... P18
Ⅶ. Calibration resolution, division and capacity …..………………… P21
Ⅷ. Meaning of some displayed symbols. ……………………………. P24
Ⅸ. Direction of indicator with bracket. ………………………. ……… P25
Ⅹ.Key Definition summary: ………………………. ………………...… P26

Ⅺ.Parameters setting summary: ………………………………... ...… P27

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Operation Manual

Thank you for purchasing the indicator. Please read all operating instructions
carefully before use and keep the following points in mind:
* Avoid lengthy exposu re to extreme heat or cold, your scale works best when operated
at normal room temperature. Always allow the scale to acclimate to a normal room
temperature before use
* Allow sufficient warm up time. Turn the scale on and wait for a few minutes if
possible, to give the internal components a chance to stabilize before weighing.
* These electronic scales are precision instruments. Do not operate near an in-use cell
phone, radio, computer or other electronic device. These devices emit RF and can
cause unstable scale readings. If your scale ever performs poorly, try moving the scale
to a different room or location.
* Avoid using in condition of heavy vibration and airflow.
* Read the weight reading in short time after loading. The output signature of load cell
and A/D may be little influenced after weighing for a long time.

Ⅰ. SPECIFICATIONS:

·SCALE INDICATOR：

1. Input signal range: 0mV ～ +30mV

2. Sensitivity: >0.2uV/grad

3. Internal Resolution: Approximately 520,000 counts

4. Display Resolution: can be selected between 500-100,000

5. System Linearity: within 0.01% of FS

6. Loadcell excitation Voltage: +4.4 VDC (MAX current: 55mA)

MAX 4- 350 ohm loadcells. “Only 140 indicator manual”

7. Calibration Method: Software calibration with long-term storage in EEPROM.

·SERIAL COMMUNICATIONS:

1. Mode: Full duplex or only output mode can be selected

2. Baud rate: 1200, 2400, 4800, 9600, or 19200 bps

3. Data format: 8NO, 7E1, 7O1

8data bits, non parity, 1 stop bit

7data bits, 1bit even or odd parity, 1 stop bit

4. Protocol: 7selected protocol (include the one compatible with NCI

2

3

standard SCP-01)

5. Output data: gross weight, net weight, tare weight, indicator displaying

weight, weighing unit etc.

·OPERATION INTERFACE:

1

1. Display: 0.65” (17mm) 7-segment LCD, 5

2. Keyboard: 4-key push button

/2 digits

·POWER:

1. Alkaline Batteries: 4 x “AAA” size cells

When all displayed segments of LCD flashed, this indicates the batteries are low

below 4.9V and you’d better to replace batteries;

When “Lo.bAt” displayed, this indicates the batteries are low below 4.7V and

you should replace batteries immediately.

2. AC Adapter: 6VDC, 500mA, with central negative:

3. Work current: ≤25mA
(when voltage in 5Vdc-8Vdc and not include load cell’s consumption)

·OPERATION TEMPERATURE: 20℃±15℃
STORE TEMPERATURE: -10℃-70℃

OPERA TION HUMIDITY: ≤95%RH (no condensate)

·LOADCELL:

Because of more than one load cell can be used on a scale, following are

required on the load cell set to be used with this indicator,

1. Sensitivity: 0.3mV/V --- 3mV/V (must be fit to >0.2uV/display grad)

2. Input Resistor: ≥80 Ω

3. Output Resistor: <10 KΩ

·LOADCELL WIRING:
PIN 1: RED, EXCITATION +
PIN2: BLACK, EXCITATION –
PIN3: GREEN, SIGNAL -
PIN4: WHITE, SIGNAL +

“PS/SK/140 MANUAL”

Ⅱ. KEY FUNCTION:

1. FACEPLATE:

2. DISPLAY SYMBOL MEANING:

2.1 Zero ◄--------The scale is at zero point and the gross weight is 0

2.2 Net ◄---------The display reading is net weight, and the tare weight is not 0.

2.3 X Hold -------The scale is under HOLD mode.

It displays the current live weight when Xflashed, and the locked reading
Will be shown when X does not flash and comes steady.

3. SUMMARY of KEY DEFINITION:

3.1 In normal weighing mode press and hold down keys for 3 seconds:

(1)

a. If this key is only set for HOLD (P2=0), press this key to enter or exit HOLD
b. If this key is only set for PRINT (P2=1), press this key to output the data

HOLD

PRINT

UNIT TARE ZERO

HOLD

PRINT

mode.

according to P4 setting.

4

5

c. If this key is set for both HOLD and PRINT function (P2=2), press this key to

output the data according to P4 setting.

(2)

UNIT

Choose weighing units among kg-lb-lb: oz

Note: The weighing units that can be used are restricted by display

division, and calibration weight unit (restricted by P8, P9, and P10):
For example, if the calibration unit is “kg”; calibration display resolution is
50kg (that means: P8=5, P9=0, P10=0), and users press UNIT key to choose
weighing units. Lb or lb:oz are not allowed to choose, since the display
resolution of 100lb or 2000oz is not available to this indicator.

(3)

TARE

Tare the weight. This function can be activated only when the scale is in
stable mode and the gross weight is not negative value.

(4)

ZERO

Zero function. When the weight is within zero range, it will active as ZERO
function and clear the tare weight. When the weight is not within zero setting

range (P13 set), the scale will show 0¯ ¯ ¯ ¯

or 0

_ _ _ _ (zero is below the setting range).

(zero point is over the setting range),

3.2. In normal weighing mode and hold down time longer than 3s:

HOLD

PRINT

HOLD

(1) (2) (3)

PRINT

UNIT TARE OFF

UNIT TARE

Same meaning with that in 3.1

OFF

(4) : Power off the scale.

(5) +

OFF HOLD

PRINT

Hold these two buttons to show firmware version; A/D code or input
working voltage of indicator.

(6) +

OFF UNIT

Hold these two buttons to enter setting mode when the sealed calibration

switch is on.

(7) +

OFF TAR E

Hold these two buttons to enter calibration mode when the sealed
calibration switch is on.

3.3 In setting mode:

HOLD UNITS TARE OFF/ON

(1) Rotate the flashed position from right to left

(2) Change the digit on flashed position. The digit can be changed

to 0, 1, 2…9; and be flashed.

(3) Confirm receiving and storing the displayed parameters,

After the setting of the last parameter, the indicator will

not exit the setup mode, and cycles from the first parameters for

viewing or modifications.

(4) Exit from setting mode to normal work mode

6

3.4 In displaying A/D code or input voltage mode:

X

(1) No function

X

(2) Choose the weight inner code or input working voltage to

WT

VOL

be displayed. The working voltage range is 4.8V-8V. If the
voltage is not within range, it may damage the indicator.
Voltage value is shown like this “U x.xx” and its unit is V.

(3) When A/D code of weight is shown, press this button to

FLT

choose filtered or un-filtered weight A/D data; when X is on,

the data is filtered.

(4) Press this button to exit this mode, and auto-reset the

EXT

indicator, display all segments of LCD, full capacity… just like
power on again and then it goes back to normal weighing mode.

3.5 Calibration mode

HOLD UNITS TARE OFF/ON

(1) Rotate the flashed position from right to left

(2) Change the digit on flashed position. The digit can be

(3) Confirm receiving input data and go into next step.

(4) Exit from calibration mode to normal work mode

changed to 0, 1, 2…9; and be flashed.

WT

VOL

FLT EXT

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Ⅲ. CALIBRATION:

Before calibrate the scale, you should prepare a standard weight (more than 25%

of FS weight, and the unit is same as P10 setting) for calibration.

1. Move away any weight on scale. When normal weighing mode, press and hold

down TARE and ON/OFF/ZERO buttons to enter calibration mode.

2. When the indicator shows” CAL-?”, the scale is ready for calibration. Press

TARE to confirm and go to next step, or press ON/OFF/ZERO to exit the

calibration mode.

3. The indicator will display “CAP.--”, that means the following data is the full

capacity according to your setting of display resolution (P7), display division

value (P8) , location of decimal point-dot in calibration unit (P9) and capacity’s

unit in calibration (P10). If the setting of FS is more than 199999 (regardless of

decimal point and weight unit), the FS capacity will be shown by first four digits

and last four digits: “Hxxx” and “Lxxx”.

For example, the display resolution is selected to 100000(P7=31), the display

division is selected to 5(P8=2), the position of decimal point is selected to one

point after zero (P9=1). The calibration unit is chosen as lb (P10=1), so the full

capacity 50000.0lb will be shown as H 50 and L000.0 in lb unit. Also, in other

modes, the data will be shown as “Hxxx” and “Lxxx” when current display data

is larger than 199999 kg/lb (not include decimal point).

Press TARE to go to next step directly; press ON/OFF/ZERO to exit the

calibration mode; or after a few seconds, it will automatically to next step.

4. The scale will automatically display the setting of division. Firstly it will display

“d.--”, and then the data according to your setting of P8, P9 and P10. You may

choose division among these as below:

Table1:

0.0001kg/lb 0.0002kg/lb 0.0005kg/lb

0.001kg/lb 0.002kg/lb 0.005 kg/lb

0.01kg/lb 0.02 kg/lb 0.05 kg/lb

0.1kg/lb 0.2 kg/lb 0.5 kg/lb

1kg/lb 2 kg/lb 5 kg/lb

10kg/lb 20 kg/lb 50 kg/lb

Press TARE to go to next step directly; press ON/OFF/ZERO to exit the

calibration mode; or after a few seconds, it will automatically to next step.

5. When ‘CAL.P0’ is displayed, that means the scale will begin to calibrate scale’s

8