AVA WEIGH 334RS150 User manual

11/2019
334RS150
150 lb.
Digital Receiving Scale
USER MANUAL
334RS400
400 lb.

INTRODUCTION & INSTALLATION
• Risk of Electrical Shock: Disconnect all power sources before making cable
connections to the scale platform or indicator.
• For use in dry environments only.
• Do not operate in hazardous areas.
• Read and understand all operating instructions before using this product. Keep
this manual for future reference.
• Record the weight shortly after placing a load on the platform. After extended
periods, the load cell’s output signal may result in a less accurate reading.
• Place the scale on a hard, flat, and level surface before using.
• Avoid extended exposure to extreme heat or cold. Optimum operation is at
normal room temperature. See operating temperature range in the specifications
table. Allow the scale to acclimate to room temperature before using.
• Allow sufficient warm up time. Turn the scale on and allow up to 2 minutes for
internal components to stabilize before weighing.
• Electronic scales are precision instruments. Do not operate near cell phones,
radios, computers or other electronic devices that emit radio frequencies that
may cause unstable readings.
• Avoid using in heavy vibration or heavy airflow conditions.
1.
GENERAL AND SAFETY INFORMATION

SPECIFICATIONS
334RS150 334RS400
MAX CAPACITY LB unit: 150lb x 0.05lb
KG unit: 68kg x 0.02kg
LB unit: 400lb x 0.2lb
KG unit: 182kg x 0.1kg
CONSTRUCTION 
WEIGHING UNITS lb/kg
CALIBRATION
UNITS lb/kg
APPLICATION
MODES Weighing
DISPLAY 
ZERO RANGE ±20% of full capacity
TARE RANGE Full capacity
STABILIZATION
TIME < 3 seconds
OPERATING TEMP 40 - 105°F (5 - 40°C)
HUMIDITY RANGE 
POWER SUPPLY 

INTERFACE RS232, USB
SAFE MAX
OVERLOAD 150% of capacity
2.

CONTROLS & FUNCTIONS
3.
DIAGRAM & CONTROL PANEL
INDICATOR DISPLAY CHARACTER DEFINITIONS

DIAGRAM & CONTROL PANEL
• Zero - Scale is zeroed and gross weight is 0, tare is 0.
• Net - Display reading is net weight; tare is not 0.
• Lb, Kg - Unit of measure.
• Hold - Scale is in dynamic weighing mode.
• Hold flashes - actual fluctuating weight is displayed.
• Hold does not flash - locked weight is displayed.
Hold Zero Net Lb Kg
UNIT
334RS150
TARE
PRINT
HOLD
150lb x 0.05lb / 68kg x 0.02kg
ZERO
ON/OFF
4.
Platform
Control Panel
Display
Coiled Cord

OPERATIONS
1. Power on the scale by pressing the ZERO/ON/OFF key.
2. When the display stabilizes, but it doesn’t show zero, press ZERO/ON/
OFF to set a new zero point.
3. Place objects on the scale platform and read the weight on the indicator.
Note: Objects should be placed at the center of the platform. Corner or
side loading heavy objects may risk overloading an individual load cell and
damage the scale.
FUNCTION KEYS
KEY MODE DEFINITION
Weighing
mode
< 3 seconds Send output data via the USB or RS232 port
> 3 seconds Enter or exit HOLD mode
 
Weighing mode Select weight unit of measure
 
Weighing mode Tare the weight
 
Weighing
mode
< 3 seconds 
> 3 seconds 
 Exit to normal weighing mode
Weighing mode (more than 3
seconds) Enter USER parameter setup mode
Weighing mode (more than 3
seconds) 
NORMAL WEIGHING MODE
PRINT
HOLD
UNIT
TARE
ZERO
ON/OFF
ZERO
ON/OFF UNIT
+
ZERO
ON/OFF +TARE
5.

OPERATIONS
KEY MODE DEFINITION
Weighing
mode
< 3 seconds Send output data via the USB or RS232 port
> 3 seconds Enter or exit HOLD mode
 
Weighing mode Select weight unit of measure
 
Weighing mode Tare the weight
 
Weighing
mode
< 3 seconds 
> 3 seconds 
 Exit to normal weighing mode
Weighing mode (more than 3
seconds) Enter USER parameter setup mode
Weighing mode (more than 3
seconds) 
4. To change the weight unit of measure, press the UNIT key.
5. To send data to another device via the serial port, press the PRINT/HOLD
key.
6. To hold the weight data, press and hold the PRINT/HOLD key for 4 seconds.
7. Power off the scale by pressing and holding the ZERO/ON/OFF key for 4
seconds.
ZERO
If the display dose not shows 0, and there is nothing on the platter, press the
ZERO/ON/OFF key to zero the reading.
Zero range: ±20% * full Capacity.
The zero function is unavailable when the displayed reading is out of the zero
range and the indicator will show the error message 0——— or 0———, meaning
the scale is over or under zero range.
YES NO NO
SETTING A TARE WEIGHT
1. Zero the scale as described above.
2. Place an empty container on the platform, press the TARE key. The display
will return to zero, eliminating the weight of the container. The NET
announciator will be lit on the display.
3. Put the material or object to be weighed in the container. The net weight will
be displayed.
4. To exit tare mode, remove all weight from the scale. The display will show a
negative weight. Press the TARE key to return the display to zero.
6.

CALIBRATION
Note:
(1) Before calibrating the scale, you should prepare standard weights (more
than 10% of FS weight) for calibration.
(2) In the following steps, pressing ZERO/ON/OFF will exit calibration.
1. Move all weight from the scale. Under normal weighing mode, press and
hold TARE and ZERO/ON/OFF keys for more than 4s to enter calibration
mode.
2. The indicator will show “CAL.P0”, the scale will begin to calibrate the zero-
point of the scale. Remove all weight from the scale. Press the TARE key to
confirm, or press the ZERO/ON/OFF to exit this mode. After receiving the
reasonable zero-point data, the next step will automatically occur.
3. When “CAL.P1” is displayed, the scale will be calibrated on second
calibration point. xxxxxx kg (or lb) will be displayed. The default standard
weight is 50%FS. Load 5%-100%FS weight on the scale, and use the HOLD
or UNIT keys to input the loaded weight. Press the TARE key to confirm
the input, and then the indicator will flash the input standard weight. After
the scale becomes stable it will automatically be directed to next step. If
the second point cannot be calibrated correctly, it will display “CAL.Er” and
return back to step2 for re-calibration.
4. When “CAL.P2”is displayed, the scale will be calibrated on third calibration
point. xxxxxx kg (or lb) will be displayed. The default standard weight is
100% FS. Load 10%-100%FS (this must be equal or larger than the weight
from the second calibration point) weight on the scale. Use the HOLD
or UNIT keys to input the standard weight’s value. Press the TARE key to
confirm. The indicator will flash the input weight. If the indicator receives
reasonable data, it will go to next step automatically. If an error occurred,
the scale will display “CAL.Er” and return back to step2 for re-calibration.
5. When “CAL.P0” is shown again, the scale will calibrate the zero-point again.
Remove any weight from the scale, press the TARE key to confirm; the
displayed data will flash. If the indicator receives reasonable data, it will
calculate and store all parameters into EEPROM. Then it will auto-reset,
and be directed to weighing mode. If an error occurred in calibration, the
scale will display “CAL.Er” and then it necessary to repeat the procedure
from step2.
USER PARAMETERS SETUP
7.

CALIBRATION
PARAMETER OPTION SETTING SETTING
U1 0-15


-

05
U2 0,1,2


1= Backlight is always on;

-
-

2
U3 0,1,2 
0=HOLD, 1=PRINT; 2=HOLD and PRINT 2
U4 0-50


1=hold larger weight reading;
2-50=when weight is more than 10d and the variety is

below 10d and then over 10d and becomes stable, the
new stable weight will be held.
2
U5 0-7



pressed, data has not been received;
2=output gross, tare, net weight, unit and status data


data, data has not been received;

status data, data has not been received;

scale becomes stable;
6=output gross, tare, net weight, unit and status data

7=Command –response mode.
1
USER PARAMETERS SETUP
1. In normal weighing mode, press UNIT and ZERO/ON/OFF until “USer” is
shown to enter in the mode.
2. Press the UNIT key to change the flashed digits, press the HOLD/PRINT
key to shift the flashed position. Press the TARE key to confirm and save
the set data and enter next setting. Press the ZERO/ON/OFF key to exit
this mode.
3. Summary of user parameters setting:

PARAMETER OPTION SETTING SETTING
U6 3
0=1200, 1=2400, 2=4800, 3=9600, 4=19200 3
U7 0

0=8N1, 1=7O1, 2=7E1 0
4. More Information for User Parameters Setting:
U5 to set serial communication output format:
(1). U5=0: No serial communication function. It will not transmit or receive any
data even if the scale is installed with serial communication hardware. Serial
communication function can be only activated when the scale is in normal weighing
mode.
(2). U5=1: Press PRINT key, the scale will output the current stable weight, weight
unit, and current Status data ; it does not receive any data . The output format is as
below:
<LF>< weight reading, minus, decimal point, weight unit><CR><LF>H1H2H3
<CR><ETX>
(3). U5=2: Press PRINT key, the scale will output the data of stable gross, tare, net
weight, weight unit and current status data. The format is as follows:
<LF><Gross: reading, minus, decimal point, unit><CR>
<LF><Tare: reading, decimal point, unit><CR>
<LF><Net: reading, minus, decimal point, unit><CR>
<LF>H1H2H3<CR><ETX>
The number of bytes used:
Weight reading ----------------------- 8bytes;
Minus ----------------------------------1byte;
Decimal point -------------------------1byte;
Weight unit ----------------------------2 or 5 bytes;
Current status (H1.H2.H3) --------- 3bytes
(4). U5=3: Continuously output of the current displayed reading, weight unit and
current status data, it does not receive any data. The output format is same as U5=1.
(5). U5=4: Continuously output of the current gross weight, tare weight, net weight
data, weight unit and current status data, it does not receive any data. The output
format is same as U5=2.
(6). U5=5: When the scale is stable, it will output the current displayed reading
,weight unit, and current status data automatically one time, it does not receive any
data. The output format is same as U5=1.
(7). U5=6: When the scale is stable, it will output the current gross weight, tare
weight, net weight unit and current status data automatically one time, it does not
receive any data. The output format is same as U5=2.

(8). U5=7: Bio-Serial Communication: after receiving an available command, the
indicator will send out the corresponding messages.
5. More Details About Serial Communication
The following details contain more information for when U5 is set to 7:
a) The baud rate and data format is set by U6 and U7. Responses to serial commands
will be immediate, or within one weight measure cycle of the scale. One second is
adequate for use as a time-out value by remote (controlling) device.
b) The length of the weight field will be 8 digit weight data, one for minus sign, one for
decimal point, two for measure unit (e.g. “lb”, “kg”). If the unit is lb:oz, another two for
“lb” and one for a space (<sp>) after lb. Units of measure abbreviations are always lower
case.
(1). If the weight is overcapacity, the scale will return ten ‘^’ characters (the field of
minus sign, decimal point, weight data is filled by ‘^’).
(2). If the weight is under capacity, it will return ten ‘_’ characters (the field of minus
sign, decimal point, and weight data is filled by ‘_’).
(3). If the zero point has an error, it will return ten ‘_’ characters.
(4). The character will be ‘-’ for negative weight or a space character for positive weight.
Minus sign follow after the first digit.
(5). Useless leading zero before digits are suppressed.
c) Key to symbols used
<LF> : Line Feed character (hex 0AH)
<CR> : Carriage Return character (hex 0DH)
<ETX> : End of Text character (hex 03)
<SP> : Space (hex 20H)
H1H2H3 : Three status bytes
<p> : Polarity character including minus sign for negative weight and a space character
for positive weight
W1-W8 : Weight data
<dp> : Decimal point
U1U2 : Measure units, “kg”, “lb”, or “lb oz”
d) Commands and responses
(1). Command: W<CR> (57h 0dh)
Response:

<LF>^^^^^^^^^^u1u2<CR><LF>H1H2H3<CR><ETX>

<LF>_________u1u2<CR><LF> H1H2H3<CR><ETX>

<LF>----------u1u2<CR><LF> H1H2H3<CR><ETX>


set by C4:
<LF><p>w1w2w3w4w5w6<dp>w7w8u1u2<CR><LF>H1H2H3<CR><ETX>

<LF><p>w1w2w3w4w5w6lb<sp>w7w8<o><z><CR>H1H2H3<CR><ETX>

Or
<LF><p>w1w2w3w4w5lb<sp> w6w7<dp>w8oz<CR>H1H2H3<CR><ETX>
(2). Command: S<CR> (53h 0dh)
Response: <LF> H1H2H3<CR><ETX>
(3). Command: Z<CR> (5ah 0dh)
Response: <LF>H1H2H3<CR><ETX>
Zero function is activated, and then it returns to current scale status, similar to
pressing the ZERO key. If ZERO function cannot be activated, it will return to current
scale status.
(4). Command: T<CR> (54h 0dh)
Response: <LF> H1H2H3<CR><ETX>
TARE function is activated, and then returns scale status, similar to pressing the TARE
key. If TARE function cannot be activated, it will return to current scale status.
(5). Command: U<CR> (55h 0dh)
Response: <LF>u1u2<CR><LF> H1H2H3<CR><ETX>
Changes units of measure and return scale status with new units, similar to pressing
the UNIT key. The new measure unit should be allowed to use as a C5 setting. If the
weight unit is lb:oz, U1U2= “lb oz”
(6). Command: L<CR> (4ch 0dh)
Response: <LF> H1H2H3<CR><ETX>
If HOLD function is enabled, go to or exit from HOLD mode, similar to pressing the
HOLD key.
(7). Command: X<CR> (58h 0dh)
Response: NONE
Power off the scale, similar to pressing and holding the ZERO/ON/OFF key for 4
seconds.
(8). Command: all others
Response: <LF>? <CR><ETX>
Unrecognized command
e) Additional Commands and Responses for Scale Base Application:
(1). Command: F<CR> (46h 0dh) --- to restore factory calibration data
Response: <LF>OK H1H2H3<CR><ETX>\
(2). Command: O<CR> (4Fh 0dh) --- zero point calibration
Response: <LF>OK H1H2H3<CR><ETX> --- if zero calibration is sufficient
<LF> H1H2H3<CR><ETX> ---- if zero calibration resulted in an error
(3). Command: H<CR> (48h 0dh) --- weight calibration
Response: <LF>OK H1H2H3<CR><ETX> --- if weight calibration is sufficient
<LF> H1H2H3<CR><ETX> --- if weight calibration resulted in an error
f) Output status bit meaning:
The status bit definition:
SYMBOL DEFINITIONS
11.

BIT BYTE 1 (H1) BYTE 2 (H2) BYTE 3 (H3)
0
0=stable 0= not under capacity
01=normal work mode
10= hold work mode


1= not stable 1= under capacity
1
0= not at zero point 0= not over capacity
1= at zero point 1= over capacity
2
0=not AD over 0=not Zero Over 0= gross weight
1=AD over 1=Zero Over 1= net weight
3
0= eeprom OK 0=not Zero down 0=not AD down
1= eeprom error 1= Zero down 1=AD down
4always 1 always 1 always 1
5always 1 always 1 always 1
6always 0 always 1 always 0
7parity parity parity
SYMBOL DEFINITIONS
0——— Zero point is over the setting range
0——— Zero is below the setting range
Ad——— Analog digital converter chip over max. range
Ad——— Analog digital converter chip below min. range
———— Weight signal is too large
———— Weight signal is too small
EEP.E1 Config parameters incorrect (no set, no calibration, over normal range,
etc.)
EEP.E2 User parameters are incorrect
CAL-Px Calibration point
CAL.Er Error in calibration
CAP.-- The setting full capacity will be displayed
Cx.y No. x configuration parameter is set to y
Ux.y No. x user parameter is set to y
Lo.bAt Battery voltage is below 4.2V

TROUBLESHOOTING
SYMPTOM PROBABLE CAUSE REMEDY
Does not turn on.
1. AC adapter is not
securely connected

3. Indicator is damaged
1. Re-plug the AC adapter or rotate the plug to securely
connect to the scale


Ad———

to indicator is not
correctly connected,
or disconnected,
or short circuit
2. Indicator is damaged
3. Load cell cable is broken
4. Load cell is damaged
1. Check the cable

3. Return the scale for repair
Ad———
0———  
the key zero range.
0——— Weight reading below Power On
Zero limit.
1. Check whether an object is stuck between scale base,
if yes, remove the object.

————
1. Weight reading exceeds
overload limit
2. The weight value cannot be dis-
played in the current unit of measure
because it exceeds 6 digits.

is displayed.
2. Use a more appropriate unit of measure.
———— Weight reading below Under load
limit 
EEP.E1 CONFIG parameters are not correct-
ly set Re-set CONFIG parameters as technical manual instructed.
EEP.E2 USER parameters are not correctly
set Re-set USER parameters per the Technical manual
CAL.Er
1. Input data or
loaded weight is
too small, too big
2. Weight signal is
unstable, un-linear

2. Return the scale for repair
Cannot zero the
display
1. Load on scale exceeds allowable
limits.(20%FS)
2. Load on the scale is unstable
1. Remove load from the scale.
2. Wait for the load to stabilize. then press the ZERO/ON/
OFF key to zero the display
Weighing is not
accurate
1. An object is stuck
between the load cell
and scale base
2. Load cell received a heavy impact
1. Remove the object

