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User’s Guide
18
SNU
respectively that indicator will power off automatically if there is no changes on weighing value and
no operation on keyboard in 3 mins, 10 mins, 15 mins and 30 mins. Choice 0 denote that automatic
power off function is not available. Press
to select then press to confirm the selected preset
time.
BUZZER
After setting the function of automatic power off, the indicator will display ‘bp on’ or ‘bp off’.
Press
to select ‘on’ or ‘off’ to turn on/off the buzzer. Non-buzzing mode will help decreasing
power consumption.
6. CONNECTION OF INTERFACE
(Please specify in the order if needed)
RS232 serial interface is a D-SUB-9 needle slot as figure 2 shows:
1 2 3 4 5
6 7 8 9
Diagr
am of RS232 slot
2: Pin RXD
3: Pin TXD 1
9: Pin TXD 2
5: Pin GND
MEANS OF POWER SUPPLY
A. Rechargeable battery
The rechargeable battery is 6V/4.5Ah. The end of red line is positive pole, while the end of black
line is negative pole. Connect the wiring terminals and tighten the screw up to fix battery well. The
rechargeable battery should be charged through adapter by pugging the adapter into power supply to
achieve automatic charge.
B. AC/DC adapter
Insert DC plug of the adapter, whose spedcification is 12V/500mA, into a DC socket, insert the other
end into relevant AC socket and connect to power supply.
In case there is no AC supply and dry battery is used as substitute, do remember to pull out DC plug
of the adapter, otherwise the indicator will fail to work.
7. CALIBRATION
1. Open up the outer case of indicator before calibrate, plug the circuit breaker JP1 into ‘on’.
2. Press and hold
for 1.5 seconds, indicator will display ‘CAL SP’.
3. Press to enter calibration mode, ‘CAL 00’ which denotes that there is nothing being weighed on
the scale will display on the screen.
4. Press to enter mode of automatic zero correction and ‘- - - - - -’ will display. After few seconds,
the previous weight will show on the screen.
5. Load weight on the scale, say weight of 20 kg. After stable indication displays, press to select
digit position (the selected digit position will blink). Digit position will carry forward to the right side
when pressing
every time. Press to set the digit among 0-9. Repeat the above operation till
‘20.00’ is displayed, then press to confirm.
6.‘- - - - - -’ will display on the screen automatically after finished the operation as Point 4 describe,
indicating the scale enter into calibration and weighing mode.
7. If ‘20kg’ displays on the screen, it denotes the consistency with weigh value; in case of none consis-
tency, please recalibrate again.
8. Offload the weight, reading ‘0.00kg’ will display and will show denoting there is nothing being
weighted on the scale.
9. The scale will return to weighing mode after calibration is finished. Do remember to plug the circuit
breaker into ‘off’ position.