LOAD CELL AMPLIFIER
MODEL

ＬＡ－１０２２Ａ

OPERATION MANUAL

11+EXC +SEN -SEN -EXC +SIG -SIG SHL Vout COM Iout COM

12

E

1
2
3
4
5
6
7
8
9
10

LA-1022A
POWER
ON
CHECK
TARE

ZERO

SPAN
L

C
F
C
F
H

RANGE

13
14

TOYO SOKKITOYO SOKKI CO.,LTD.
Head Office: 964-24 Nippa-chou, Kouhoku-ku, Yo ko h a m a, 2 23- 00 57 J a p a n
ＴＥＬ +81-45-540-8353
ＦＡＸ +81-45-544-8354

MA4-00292-R0 (2020/7)

－－ Table of contents －－Page§１ ． S u m m ar y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3§２ ． A p p e a r a n c e a n d E a c h n a m e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3§３ ． O p e r at io n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4３－１） TARE (T ARE SETTING , 16 POSITION ROTARY SWITCH ) .............................................. 4３－２） ZERO (Z ERO POINT ADJUSTMENT TRIMMER ) .......................................................... 4３－３） GAIN MODE, RANGE (A MPLIFICATION RANGE DIP SWITCH ) ...................................... 4３－４） SPAN (SPAN ADJUSTMENT TRIMMER ) ................................................................. 5３－５） CHECK (P SEUDO INPUT SIGNAL SETTING ROTARY SWITCH ) ......................................... 6３－６） R EMOTE SENSING FUNCTION ............................................................................ 6§４ ． C a l i b r a t io n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7４－１） N ECESSARY SETTING PRIOR TO CALIBRATE ............................................................ 7４－２） C ALIBRATION METHOD WITH ACTUAL LOAD ............................................................ 7§５ ． T r o u b le s h o ot i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8５－１） B ASIC CHECK POINT ..................................................................................... 8５－２） W HAT TO DO IF THE DESIRED CALIBRATION IS NOT ACHIEVED ....................................... 8５－３） F INE TUNING OF ZERO AND SPAN AMOUNT OF CURRENT OUTPUT ..................................... 8５－４） J UDGEMENT IF THIS UNIT IS MALFUNCTION ............................................................ 9５－５） C HECK L OAD C ELL ....................................................................................... 9§６ ． I n st a ll at i o n a n d c o n n e ct io n m e t h od . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10６－１） I NSTALLATION ENVIRONMENT , ETC . .................................................................. 10６－２） T ERMINAL CONNECTION ............................................................................... 10§７ ． L i s t o f M o d e l s a n d A c c e ss o r ie s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
７－１） M ODEL .................................................................................................. 11７－２） A CCESSORIES ........................................................................................... 11§８ ． S p e c i f i c a t i on s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12８－１） P OWER SUPPLY PART TO L OAD C ELL OR A SENSOR .................................................. 12８－２） A MPLIFIRE PART ........................................................................................ 12８－３） G ENERAL ................................................................................................ 13§９ ． D im e n s i o n a l Dr aw in g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
§１ ０ ． Fu n ct i o n a l b l o ck d ia g r am . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

This document is translated from MA4-00259-R2 (Japanese)

MA4-00292-R0-2-

§１．Summary
This unit is a low drift instrumentation amplifier which amplifies a signal from a strain gaugetransducer and outputs voltage signal and current signal simultaneously.
Also this unit has a remote sensing function to reduce measurement error caused by a sensor
cable.
Applying volta ge to Load Cell or a sensor is selected from 10V, 5V, 2.5V at the time ofordering.
The power supplied voltage is AC100V as standard or DC24V which specified as option at
the time of order.
§２．Appearance and Each nameAppearance of this unit

11

+EXC +SEN -SEN -EXC +SIG -SIG SHL Vout COM Iout COM

12

E

1
2
3
4
5
6
7
8
9
10

LA-1022A
POWER
ON
CHECK
TARE

ZERO

SPAN
L

C
F
C
F
H

RANGE

13
14

TOYO SOKKI① POWER (LED)LED for indicating power ON② CHECK (CAL SW)

Pseudo input signal generation switch③ CHECK

Pseudo input signal setting, 16 position rotary switch④ TAREFor Tare subtraction, 16 position rotary switch⑤ ZERO

Zero adjustment trimmer (Coarse / Fine:15 rotation)⑥ SPAN

Span adjustment trimmer (Coarse / Fine:15 rotation)⑦ GAIN MODE

Amplification range DIP switch (Low/High)⑧ RANGE

Amplification range adjustable DIP switch (7 steps setting)⑨ TERMINAL

7.62mm pitch 14P terminal for Load Cell, Analog output and Power⑩ MOUNTING HOLES Fixing hole 2 -Φ4.5mm

MA4-00292-R0-3-

§３．Operation
This unit outputs voltage signal and current signal. Voltage output is bipolar and can be
output up to ±5V. (Max. ±10V depending on intensity of input signal from a sensor)
Current output 4 ～20mA is available only when voltage output is set to 0～5V. Combination
other than 4～20mA / 0～5V is impossible.
３－１） TARE (Tare setting, 16 position rotary switch)
This switch can be used to cancel the unbalanced voltage equivalent to Tare amount when
Tare amount is too large to achieve zero adjustment. The setting is 16 positions from 0 to F
and can be set at about 0.15mV/V step. (0mV/V～2.25mV/V) The larger the setting value,
the larger Tare cancellation amount.
When you want to adjust the output to 0V (with Tare load applied), set a coarse [ZERO]
trimmer at the center position beforehand and turn a [TARE] rotary switch to set the output
value to the lowest level.
If the weight of Tare load is known in advance, equivalent output level of Load Cell weighing
Tare load can be calculated using the following formula to determine the code of TARE rotaryswitch.
Equivalent LC output of Tare (mV/V)＝

Tare load weight
Load Cell rated capacity

×Load Cell rated output (mV/V)

Code and Tare amount by [TARE] rotary switch
Code

Tare amount

Code

Tare amount

Code

Tare amount

Code

Tare amount

０

0

mV/V

４

0.6

mV/V

８

1.2

mV/V

C

1.8

１

0.15 mV/V

５

0.75

mV/V

９

1.35 mV/V

Ｄ

1.95 mV/V

２

0.3

mV/V

６

0.9

mV/V

Ａ

1.5

mV/V

Ｅ

2.1

３

0.45 mV/V

７

1.05

mV/V

Ｂ

1.65 mV/V

Ｆ

2.25 mV/V

mV/V
mV/V

３－２） ZERO (Zero point adjustment trimmer)
This is a zero adjustment trimmer to set the output voltage to 0V when there is unbalance
voltage of Load Cell or voltage of Tare load. There are a coarse adjustment trimmer and a fineadjustment trimmer.
Adjustment range of zero trimmer is approximately ±0.2mV/V.
If zero adjustment cannot be achieved within this range, use a [TARE] rotary switch.
３－３） GAIN MODE, RANGE (Amplification range DIP switch)
Set the amplification range of voltage to the desired degree of output of a maximum load.
Amplification range is adjustable in 9 steps by combining [GAIN MODE (H/L)] and [RANGE (1～7)] DIP switch. Set only one bit of the [RANGE(1～7)] DIP switch. Amplification will belarger as a range number becomes larger. Necessary setting of [GAIN MODE] and [RANGE] isdetermined by the following formula. Please refer the table below.

MA4-00292-R0-4-

※Remind that amplification level is same at setting [GAIN MODE=H]、[RANGE (1～5)] and[GAIN MODE=L]、[RANGE (3～7)]. It means amplification range is in 9 steps in total.
※If output voltage is set to 10V, [GAIN MODE] should be set to H.

LC output of maximum load (mV/V)＝

Required amplification ＝Maximum load
Load Cell rated capacity

×Load Cell rated output (mV/V)

Desired output voltage at maximum load (mV)
Load Cell output of maximum load (mV/V) x EXC (V)※EXC is applied voltag e to Load Cell = 10V, 5V or 2.5V

GAIN
MODE

L

H

EXC=10V

EXC=5V1

151～225302～4542

210～316420～636

Necessary LC output amount(mV/V)
for 5V,20mA
for 10V
EXC=2.5V
outputoutput604～9093.30～2.23―――
839～1275
2.38～1.59―――

3

300～453600～9111199～1824

1.66～1.11―――

4

420～636840～1277

1679～2556

1.19～0.79―――

5600～9111202～1828

2402～3658

0.83～0.55―――

6841～1278

1684～2563

3366～5128

0.59～0.40

71203～1831

2410～3671

4819～7344

0.41～0.28

―――
―――

1

300～453599～9091197～1821―――3.30～2.21

2419～635

839～1275

1677～2553―――

2.38～1.58

3

599～9091199～1824

2397～3651―――

1.66～1.11

4

839～1274

1679～2556

3357～5114―――

1.19～0.79

51199～1824

2402～3658

4802～7318

0.83～0.55

61680～2558

3366～5128

6730～10259―――
0.29～0.2072405～3333

4819～6666

9636～13333

0.20～0.15

0.41～0.30

Amplification

RANGE
(1～7)

0.59～0.40

３－４） SPAN (SPAN adjustment trimmer)
This is a span adjustment trimmer for amplifying signal of voltage. There are a coarse
adjustment trimmer and a fine adjustment trimmer.
Rotate a trimmer clockwise (CW) to increase amplification, counterclockwise (CCW) todecrease it. Rotate a coarse adjustment trimmer fully counterclockwise (CCW) can reduce
the output to about 70% of the maximum.
If adjustment cannot be completed within this range, change the [GAIN MODE (L/H)] and[RANGE (1～7)] DIP switch setting.

MA4-00292-R0-5-３－５） CHECK (Pseudo input signal setting rotary switch)(Pseudo input signal generating push switch)
By pressing a [CHECK] button switch, a pseudo input signal can be generated and added tothe input signal. A pseudo input signal is generated only while the button is pressed. The
pseudo input signal can be set at about 0.15mV/V step by 16 position rotary switch. Aftercalibration of the scale is completed, with no load (output is 0V), pressing a [CHECK] button
switch (keep pressing) and turn a [CHECK] rotary switch to set the output to be 75% or moreof measured value of the maximum load. By making a note of the rotary switch setting
position and output value, it can be used as a secondary calibration value.
Even if the span trimmer is touched after calibration, the span amount can be re-calibrated
based on this secondary calibration value.

３－６） Remote sensing function
When using a longer sensor cable, the resistance of a cable is not negligible and the resistancevary if environment temperature vary. Fluctuation of the resistance will cause fluctuation ofvoltage drop and fluctuation of applied voltage to a sensor and result in measurement error.
Remote sensing function helps to decrease a measurement error. This function requires asensor cable of 6core wire. If 4core wire cable is used, set two attached metal plates as they
are at the time of shipment. If 6core wire cable from Load Cell with remote sensing is used,remove two metal plates from terminal and make a remote sensing function effective.
!CAUTION
In case of not using a remote sensing function, make it sure to set two attached metal plates
to make electrical short between +SEN and +EXC terminal also between -SEN and -EXC
terminal. Otherwise a remote sensing circuit in this unit does not work correctly and will
abnormal voltage is applied to a sensor and might damage a sensor of Load Cell or this unit.

MA4-00292-R0-6-

§４．Calibration
Calibrate the output level to 0V with no load on Load Cell, and calibrate the output levelto the desired voltage with maximum load on Load Cell. Current output 4～20mA isavailable when voltage output is adjusted to 0～5V. Calibration operation is based on“actual load calibration” using a known weight such as a reference weight.
４－１） Necessary setting prior to calibrate
1). Amplifier gain setting (GAIN MODE, RANGE setting)Set the amplification range to the desired output level. Calculate Load Cell output of
maximum load and select the corresponding [GAIN MODE(H/L)] and [RANGE (1～7)].
For a calculation method of Load Cell output of maximum load, refer to section 3-3).
４－２） Calibration method with actual load1). Put nothing on Load Cell (only the initial Tare load is applied)2). Turn a [TARE] rotary switch to set the position where the output is closest to 0V.
3). Turn a [ZERO] trimmer (Coarse, Fine) to adjust the output to 0V.
4). Place a known weight such as a reference weight on Load Cell and turn a [SPAN]
trimmer (Coarse, Fine) to adjust to the desired output voltage.
5). Remove a known weight such as reference weight from Load Cell.
6). Confirm that the output value is 0V. If not, repeat from step 3) above.

※．If calibration operation cannot be done properly, refer to se ction §5 Troubleshooting
and take measures.

MA4-00292-R0-7-

§５．Troubleshooting
If this unit is malfunctioning, please contact us if the problem cannot be resolved by thefollowing measures. At this time, please inform us of the model name, product serial number,the malfunction symptoms and usage as much as possible. The model name of Load Cell ora sensor connected to this unit should be also informed.
５－１） Basic check point
1). Check whether the power supplied voltage AC100V or DC24V is normal and stable.
2). Check whether the terminals are connected correctly and firmly.
５－２） What to do if the desired calibration is not achieved1). Zero adjustment cannot be done.
Zero adjustment range is ±0.2mV/V
If the output is more than 0V even if a [ZERO] trimmer is turned fully counterclockwise(CCW), increase a [TARE] rotary switch setting.
If the output is less than 0V even if a [ZERO] trimmer is tuned fully clockwise (CW),
decrease a [TARE] rotary switch setting.
2). When span adjustment, the desired output voltage cannot be set.
If the output is below the desired value even if a [SPAN] trimmer is turned fully
clockwise (CW), change a [GAIN MODE] and [RANGE] DIP switch and increase theamplification by one step.
If the output exceeds the desired value even if a [SPAN] trimmer is turned fully
counterclockwise (CCW), change a [GAIN MODE] and [RANGE] DIP switch anddecrease the amplification by one step.
9 steps can be set according to the [GAIN MODE] and [RANGE] DIP switch setting. If thedesired output is not obtained even if trying a DIP switch setting, check whether Load
Cell output satisfies the sensitivity adjustment range of this unit.
Choose only one step of the setting of [RANGE（1～7）]
3). Output current is out of range of 4～20mA or the output voltage is out of range of ±10V
even though it is not overloaded.
① When a part of Load Cell cable is disconnected. (Ref: Section 5-5)
② A [TARE] rotary switch setting is inappropriate. (Ref: Section 5-2-1)③ A [GAIN MODE] or [RANGE] DIP switch setting is inappropriate. (Ref: Section 5-2-2)④ When Load Cell becomes defective. (Ref: 5-5)

Span adjustment trimmer

５－３） Fine tuning of zero and span amount of current output
Current output 4～20mA is adjusted when voltage output is set to 0～5V.
If re-tuning of current output is necessary, take measures as follows. But
combination other than 0～5V/4～20mA is impossible.
There are two holes for adjustment trimmers on the base metal bracket.
If this unit is installed in a control panel, it is necessary to remove thisunit from it.
Span adjustment trimmer of current output (1 rotation)
Zero adjustment trimmer of current output (1 rotation)

Zero adjustment trimmer

Trimmers for
current output on
the base metal
bracket

MA4-00292-R0-8-

① Tune a zero adjustment trimmer to set current output to 4mA when output voltage
is 0V② Tune a span adjustment trimmer to set current output to 20mA when output voltage
is 5V
Current output is adjusted properly at the shipment in TOYO factory. It is not necessary to
re-adjust it. But current output is not appropriate even if re-adjusting has been done,
please conta ct us.
５－４） Judgement if this unit is malfunction1). Check excited voltage of Load Cell
Checking the excited voltage between terminal No.1 (+EXC) and No.4 (-EXC) is stable
at 10V ±0.5V*. If it is not stable, a power supply circuit inside this unit may be
defective. (*10V is for standard. EXC=5V±5% or EXC=2.5V±5% as option)
2). Short the output voltage of Load Cell (making an electric short between terminal
No.5 (+SIG) and No.6 (-SIG)). In other words, the input voltage to this unit ismade zero.
At this time, set a [TARE] rotary switch to ‘0’ once. In this state, the voltage which
adjusted by a [ZERO] trimmer is output, so the output does not become 0V, but it cancheck whether the output is stable.
If it is not stable, an amplification circuit in this unit may be defective. If it is stable,
check Load Cell side.
Please restore the setting of a [TARE] rotary switch to the original position after checking.
５－５） Check Load Cell
Since Load Cell is composed of a bridge circuit, it is possible to make a roughjudgement by measuring the input / output resistance and insulation resistance.
＊ Please be sure to turn OFF this unit before checking Load Cell.
1). Failure judgement method by Load Cell resistance value.
① Remove all Load Cell cables.
② Measure the bridge resistance of Load Cell with a tester and check if there is any
abnormality in the input / output resistance.
2). Failure judgement method based on Load Cell insulation resistance① Remove all Load Cell cables.
② Measure the insulation resistance between shield and each cable of Load Cell at a
voltage within 50V.
In addition, the insulation resistance between a metal case of Load Cell and each cable
other than shield is also measured at a voltage within 50V.
③ If the insulation resistance is 1000MΩ or more, Load Cell is mostly good.

MA4-00292-R0-9-

§６．Installation and connection method６－１） Installation environment, etc.
1)
2)

3)

The operating temperature range of this unit is 0 ℃ to 40℃.
Consider installing in a place not exposed the direct sunlight.
This unit is operated with power supplied voltage AC100V±10%, or DC24V (DC20 to27V) specified as option.
Note that connecting to a different voltage may cause failure or damage.
Please fix this unit with M4 screw using hole 2-Φ4.5 of the base bracket

６－２） Terminal connection
Wiring to this unit is done with 7.62mm pitch 14pin terminal block. The shield line of eachcable shall be grounded by either this unit or each connected instrument, so that there is no
ground loop.
1). Load Cell, Analog output and Power supply connection
7.62mm pitch terminal block
No.
1

+EXC

Connection signal
Excitation voltage to Load cell (+)

2

+SEN

Remote sense input

(+)

3

－SEN

Remote sense input

(－)

4

－EXC

Excitation voltage to Load cell (－)

5

+SIG

Input signal from Load cell (+)

6

－SIG

Input signal from Load cell (－)

7

SHL

Shield line of Load cell cable

8

Vout

Voltage output signal (＋)

9COM

Voltage output signal (－)

10

Iout

Current output signal (＋)

11

COM

Current output signal (－)

12

E

13

AC

14

AC

GroundingPower AC100V

+24V
0V

COM(#9, #11) arecommon.
The shield line ofthe output signal
should be groundedon the receiving
device side.

Power DC +24V (option)
Power DC 0V (option)

Applicable crimp terminal: Crimp terminal for M3 up to 6mm width2). Precautions for connection① Terminal of +EXC and +SEN / -EXC and -SEN is connected by two metal plates at thetime of shipment. If using a 4core cable of Load Cell and not using remote sensing
function, make it sure to two attached metal plates are connected as they are at thetime of shipment. If using a 6core wire cable, remove two metal plates from terminal
and make remote sensing function effective.
② Remote sensing of this unit is effective when a resistance of Load Cell cable less than10Ω (20Ω, cable length to and from). General AWG24 wire of 100m length has aresistance about 9Ω. Use a Load Cell cable as thick as possible.
③ Ground the shield line of each cable on either this unit or the connected instrument.
MA4-00292-R0- 10 -

④ Since cable wiring color of Load Cell (transducer) differs depending on the
manufacturer, check the wiring color with Test Report attached to Load Cell.
⑤ In general Load Cell, shield line of Load Cell cable is not connected to a metal case of
Load Cell. If the ground potential of this unit is different from the potential of Load Cell
metal case, it is easy to be affected by inductive noise.
Therefore, make sure that Load Cell mounting base is at the same potential as metal caseof this unit by a grounding cable.

§７．List of Models and Accessories

７－１） Model
ＬＡ－１０２２Ａ－ＤＣ－ＥＸＣ５Ｖ－１０Ｈｚ
Fi l t e r c h ar a c t e r i s t i c
Bl a n k: 2H zx x Hz: 5, 10 H z ( OP )E x c i t at i on v o l t ag e t o L o ad C e l l
Bl a n k:10V
E X C 5V
: 5V ( O P )E X C 2. 5 V : 2. 5 V ( OP )P ow e r su p p li e d v o l t ag e
Bl a n k: A C 10 0V
DC: D C2 4V ( O P)
P r od u c t m o d e l n a m e※Modification of Power supplied voltage, Excitation voltage andFilter characteristics is optional (OP) at the factory.

７－２） Accessories
Metal plate for shorting
Operation Manual

2 pcs (attached to the terminal)
1 copyMA4-00292-R0- 11 -

§８．Specifications

８－１） Power supply part to Load Cell or a sensor1). Excitation Voltage
2). Number ofConnectable sensors3). Correction ofvoltage drop

DC10V±5％
DC5V or DC2.5V is optional at the time of ordering.
4 sets of 350Ω type Load Cell (120mA maximum)(EXC=5V: 60mA maximum, EXC=2.5V: 30mA maximum)
Remote sensing function
Resistance of Load Cell cable (to and from) should be less than 20Ω

８－２） Amplifire part1). Input range2). Initial tareelimination3). Zero adjustment
range4). Sensitivity
adjustment

Gain Mode
Range
Span

±3.3mV/V (sum of tare amount and measuring weight)
0～2.25mV/V (0.15mV/V step by 16 position rotary switch)
approx. ±0.2mV/V
Multi-turn trimmer adjustment(Coarse, Fine adjustment: 15 rotations each)
Amplification variable range: x3333 to x151
(twice the above at EXC=5V, 4 times at EXC=2.5V)
Span amount 0.15～3.3mV/V can output 4～20mA or 0～5V
(If span amount is 0.3mV/V or more, 0～10V can be output)
Standard sensitivity : Output 0～5V or 4～20mA when EXC=10V,
0～1mV/V input, Gain=500 times
H(0.15～0.3 mV/V) / L(0.3～3.3 mV/V) (DIP switch)
7 steps (DIP switch)
Multi-turn trimmer adjustment(Coarse, Fine adjustment: 15 rotations each)5). Voltage output

0～±5V (Load resistance 2kΩ or more) Bipolar output
If span amount is 0.3mV/V or more, output 0～±10V is possible.

6). Current output

4～20mA when voltage output 0～5V
(Load resistance 510Ω or less)

7). Simultaneous output

Output voltage and current simultaneously.
There is 0.2% error of conversion of voltage to current.
(Two trimmers on the base metal bracket are reserved to finetune zero and span of current output)8). Non linearity±0.05％FS (±0.1％FS when EXC=2.5V)

9). Filter
Characteristic

fc = approx.2Hz (-3dB) as standard, -12dB/oct. Low pass filter
fc = 5, 10Hz as option at the time of ordering10). Temperature coefficientZero±0.005％ FS/℃ typ. (at standard sensitivity)(Twice the above at EXC=5V, 4 times at EXC=2.5V)

Sensitivity±0.005％ FS/℃ typ.
(±0.01％ FS/℃ typ. at EXC=2.5V)

11). Check function

A pseudo input signal can be generated by pushing the
CHECK button switch. It is added to the input signal.
0～2.25mV/V (0.15mV/V step by 16 position rotary switch)(Temperature coefficient: 25ppm / ℃ maximum)

MA4-00292-R0- 12 -

８－３） General1)． Power stability±0.02％ FS (Power supplied voltage fluctuation within±10％)2)． Power supplied
AC100V±10% 50/60Hz
as standard
voltage
DC24V (DC20～27V)
as option3)． Current consumption
approx. 10VA(AC100V), 0.5A typ.(DC24V)
4)． Operating Temp./Humidity
0～＋40℃、20～85％ R.H. without condensation
5)． Store Temp./Humidity­20～＋60℃、20～85％ R.H. without condensation
6)． Mass
approx. 0.9kg(AC100V), 0.6kg(DC24V)
7)． Mounting method
Wall mount method
Fix with M4 screw using 2-Φ4.5 of the base bracket

MA4-00292-R0- 13 -

§９．Dimensional Drawing

11+EXC +SEN -SEN -EXC +SIG -SIG SHL Vout COM Iout COM

12

E

1
2
3
4
5
6
7
8
9
10

LA-1022A
POWER
ON
CHECK
TARE

ZERO

SPAN
L

C
F
C
F
H

RANGE

13
14

TOYO SOKKI§１０．Functional block diagram
AMPLIFICATION
RANGE
S1:x1
S2:x1.4
S3:x2
GAIN MODE FREQUENCY SELECTION
S4:x2.8
S5:x4
S6:x5.6
S7:x8
Tare subtraction
Zero adjustment(Adding Amplifier)Gain Adjustment
SPAN Adjustment(Coarse / Fine)

Filter
fc=2Hz, 5Hz,
10Hz
-12dB/oct

Buffer Amplifier

Voltage Output

V/I conversion

Current Output

L/C Power Supply
w/ Remote Sensing

Resistance of L/C cablefor applying voltage(to and from)Less than 20Ω

350Ω 4units

Applying voltage
selection

On the rear of case

AC
TRANSFORMERPower Supply
part(±15V)
DC/DC CONVE RTER

MA4-00292-R0- 14 -