KeLi XK3101 User manual

XK3101 (KM05 ) Weighing Transducer
User Manual
zRead the manual carefully before use
zPlease take good care of this manual for future reference
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1. General Description
KM05 is a weighing transducer promoted by Keli Electric Manufacturing (Ningbo)
Co., Ltd. It applies for an industrial control fields (or other applications with analog
output). It combines weight display and analog signal together. Its signal
transaction of former part adopts high-precise A/D converter with 24 bits, and the
output of analog signal adopts D/A converter with 16 bits. Its shell is a small box
made from aluminum, easily to be inserted into its control cabinet.
1.1. Main Specification
zProtection function of over load and short circuit in excitation loop for load cell
zHigh precision, high resolution Σ-△mode A/D converter, maximum A/D pulse
1,000,000
zUpdating rate: 6.25 times/second, 12.5 times/second, 25 times/second, 50
times/second
zNumber of its division: 1000 ~ 10000
zDivision value range: 0.001 ~ 50
zTwo-point (off) relay output. Mode of output can be set: weight selective mode
and value-fixed mode.
zIsolated digital communication interface, RS232 or RS485 can be selected.
zAnalog output mode can be set : 4～20mA、0～20mA、0～5V or 0～10V
z7 bits of LED digital tube display, height of word is 0.56 inch
z20 segments of light pole display
1.2. Technical Specifications
a. Loading capacity
zExcitation voltage: 5.0 VDC, connect 8pcs of 350Ωanalog load cells
zSignal range: 1.5 ~ 40mV
zZero signal range: －40～38.5mV
zAnalog current output: Max 500Ω
zAnalog voltage output: Min 10 KΩ
zTouched – point capacity of relay: AC 7A／250V, DC 12A／120V
b. Performance
zFull scale temperature coefficient: 5PPM/℃

zZero temperature drift: 0.06 uV/℃
zMax. Sensitivity: 0.6uV/d
zNon-Linearity: ≤0.01%FS
zDrift of analog output (0mA or 4mA): 50PPM／℃
zOutput drift (20mA or 24mA): 50PPM／℃
c. Power supply
Voltage range of weighing transducer is AC 187 ~ 242V, frequency is 49～51Hz,
maximum power consumption is 6 watt. Good ground wire is necessary, and it
cannot share power supply with electrical equipments, for example, relay or heater
which easily causes noise.
d. Temperature and Humidity
Working temperature: -20℃∼50℃, humidity 10％∼95％, no condensation.
Saving temperature: -30℃∼60℃，humidity 10％∼95％，no condensation.
e. Outline dimension (unit: mm)
Fig. 8.4-1
2. Installation
2.1. Weighing transducer fixation
KM05 weighing transducer adopts panel installation, no thicker than 4mm for
cabinet is requested. Hatch dimensions of cabinet are as below: (unit: mm)
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Fig. 8.4-2
Before installation, mandril of both sides of weighing transducer should be removed
firstly, and then weighing terminal is put into the cabinet. The two mandrils are fixed
to both sides of weighing terminal tightly to guarantee the firm installation of
weighing transducer.
2.2. Connection of weighing transducer
a. Back View picture of weighing transducer
Fig. 8.4-3
b. Connection to power supply
Weighing transducer adopts AV 220V with a 0.5A fuse under below part of socket. Check
power supply before connection.
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c. Connection of load cell and weighing transducer
Load cell adopts 9 wire plugs; end of weighing transducer is a hole. Definition for
foot signal takes fig. 8.4-3 for reference.
Fig. 8.4-3
If four wire shield cable is use, Exc + and Sen+, Exc- and Sen- must be connected,
▲Connection for load cell to indicator and shield cable to ground must be reliable.
Connecting wire mustn’t be put in and out when indicator is being electrified;
avoiding static power makes damage to indicator or load cell.
▲As load cell and indicator are static sensitive equipments, measurement must be
taken when they are used. Electric welding or other strong electric operations are
prohibited on scales. Action to prevent damage caused to load cell and indicator
from thunder must be taken in raining season. Safety for both operators and
weighing
d. Serial port communication wire connection
Weighing transducer has two communication ways RS232 and RS485. Both ways
can be used simultaneously when serial port transmits data and the data formats
are the same. Among transducer inside wires, just one can be chosen when serial
port receiving data. Two end wires are connected to one D type 9 wire socket.
Definition of foot signal is as fig. 8.4-4.
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！Must not put in or out, welding with electric
！Professional person connect and debug serial port
！Transducer connect to ground must be reliable

e. Analog output connection (Fig. 8.4-5)
Transducer can choose voltage and current output.
Connecting wire uses in-out connection end. The
middle part is the common part for analog signals.
Output of voltage and current are connected to different
ends. To the backboard, the right one is current output,
middle one is the common part and the left one is
voltage output. Fig. 8.4-5
Taking current output for example, connecting higher
wire of current to 1＃end, lower wire to 2＃end. As
voltage output, positive part connects to 3＃end and
negative part to 4＃end.
Transducer cannot output voltage and current signals simultaneously. Just
one can be chosen when it is used.
f. Relay output control (Fig.. 8.4-6)
Transducer has two-point relay output. Touching points which are open regularly
are fetched out by four wire in-out end in the back.
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Note: capacity of relay touched point is AC
7A/250V, DC 12A/120V. To transducer
backboard, right two are 1 ＃relay
output, left two are 2＃relay output.
Fig. 8.4-6

3. Display Panel
(Fig. 8.4-7)
XK3101 (KM05) weighing transducer has four buttons on display Panel, used for all
operations and parameters set-up for indicator.
: Zero button, it is value increased button when in set-up state.
: Tare button, return (or value decreased) button, when in set-up state.
: Function button, can look over some parameter of indicator, it is a
selective button when in set-up state.
: Confirmation button.
Indicator light:
RELAY1: 1＃relay action indicator light
RELAY 2: 2＃relay action indicator light
POWER: power supply indicator light
OVER: overload of load cell excitation loop or short circuit indicator light
Dynamic: it is bright when weight reading is unstable
Tare: tare indicator light
Zero: zero indicator light
4. Serial port data format
Transducer adopts two ways RS232 and RS485 to transmit data. Data are the
same as contents of indicator displayer. Every frame of information is composed of
1 start bit, 8 data bits and 1 stop bit, no parity bit. Baud rate can choose 1200, 2400,
4800 or 9600.
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Every data includes 8 frames. The first frame is data starting frame “=”, following
are 7 data frames. The higher bit use “0”, if the displaying value is minus value,

then the highest bit transmits “-“
For example:
Indicator displays “12345”, serial port transmits data “=0012345”
Indicator displays “1234.5”, serial port transmits data “=012345”
Indicator displays “-12345”, serial port transmits data “=-12345”
Data frame keeps 7 bits all the time, including radix point
5. Calibration
5.1. Parameters confirmation
Several parameters need to be confirmed before calibration, including Maximum
weighing value, maximum divisional reading and maximum value. The formula is
Maximum weighing value = Maximum divisional reading * Maximum divisional
value.
The divisional reading usually is from 1000 to 10000, divisional value is 1*10n,
2*10n or 5*10n and n selects value as -3, -2, -1, 1. At a fixed maximum weighing
value, choosing a suitable divisional value must guarantee that uV of each division
is more than or equal to 0.6uV/d. Calculation of uV/d is as following formula:
Divisional value(kg) * sensitivity of load cell output (mV/V) * excitation voltage (V) *1000
uV/d= capacity of load cell (kg) * quantity of load cell (pcs)
Generally, the sensitivity of load cell is 2 mV/V. The exact parameters please take
manual of load cell for reference.
5.2. Steps of calibration
Calibration should be operated by professional technician. If it is scale applied for
commercial balance, it should be operated under supervision of Legal Metrology
Institution as well.
Following is the steps of calibration:
a. Press [Fn] and [→0←] buttons simultaneously, indicator displays “ ”
b. Press [ PT] button, indicator displays “ ”, at this time the value is the
previous calibrated divisional reading, then press [Fn] button to choose
divisional reading.
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c. Press [ PT ] button, indicator displays “ ”, press [ Fn ] button to choose
divisional value.
d. Press [ PT ] button, indicator displays “ ”, then press [ Fn ] button to
choose parameters. When F1.1=0, it means normal calibration of two points
(zero point and another weighing point). When F1.1=1, it means calibration of
three points (zero point, weighing point 1 and weighing point 2). Usually F1.1=0
is chosen.
e. Press [ PT ] button, indicator displays “ ”, it means zero will be
calibrated, at this time check if there is nothing on the scale.
f. Press [ PT ] button, indicator displays “ ”meanwhile the light
pole is extinguished gradually. During this time the reading is unstable and the
light pole comes back to the full-bright state. If it keeps full-bright all the time,
please turn off the power supply to check wire connection of system or contact
our after-sales services department. After light pole fully extinguished, indicator
will turn to next step automatically.
g. When indicator displays “ ”, calibrate the weighing value. Standard
poise is put on the scale and the poise whose weight is more than 20% of
maximum weighing value is recommended. The poise is put evenly or at the
center of scale.
h. Press [ PT ] button, indicator displays “ ”, meanwhile the light
pole is extinguished gradually. During this time the reading is unstable and the
light pole comes back to the full-bright state. After light pole fully extinguished,
indicator will turn to next step automatically.
i. The value of loaded poise should be inputted when indicator displays maximum
weighing value XXXXX. Press [ Fn ] button, position of glittering can be chosen
and press [→0←] button, value of glittering bits can be amended.
j. Press [ PT ] button, when F1.1=1, indicator displays “ , when
F1.1=0, indicator displays “ , take calibration step 13 for reference.
When indicator displays “ ”, it means the non-linearity of second point
of load is being amended. Adopting this method can improve it when linearity of
scale is not good. Then loading poise can be continued.
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Note: when uV of each division is less than 0.6 uV, indicator will show “E4”,
then press [ Tare ] button, it returns to the previous step. Press [ PT ] button, the
calibrated result can be accepted. In other words, uV of each division is less
than 0.6nV, indicator still work correctly.
k. Press [ PT ] button, indicator displays “ ”, meanwhile the light
pole is extinguished gradually. During this time the reading is unstable and the
light pole comes back to the full-bright state. After light pole fully extinguished,
indicator will turn to next step automatically.
l. The value of loaded poise should be inputted when indicator displays maximum
weighing value XXXXX. Press [ Fn ] button, position of glittering can be chosen
and press [→0←] button, value of glittering bits can be amended.
m. Press [ PT ] button, indicator displays “ ”, then press [ Fn ] button, it
can switch to display “ ”. When it displays “ ”, press
[ PT ] button, it means accepting and saving the calibrated result. When it
displays “ ”, press [ PT ] button, it means the calibrated result is
available only this time, when turn on the transducer again, it adopts the
previous calibrated data. Until now, calibration is finished.
Tips:
If the zero drift of load cell exceeds the range of zero set-ups when power on,
Zero can be calibrated again as calibration steps. When it is step 7, press
[ Tare ] button for many times, and when indicator displays “ ”, press [ PT ]
button to quit out.
Notice: incorrect operation – such as press [ PT ] button when displaying
“”, it will turn into capacity-proofread step. So you must be careful
when calibrating zero separately.
6. Choice and adjustment of analog output modes
Calibrating head must be inserted and then the calibration can be operated. It is
only available when indicator possesses analog output module.
6.1. Choose and adjustment of output mode
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