Rion ACA826T User manual

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
SPECIFICATIONS
Item No.：ACA826T
Description: High Accuracy Digital Type Dual-Axis Inclinometer
with Full Temperature Compensation
Production implementation standard reference
● Enterprise quality system standards: ISO9001: 2008 standard (certification number: 128101)
● Tilt sensor production standards: GB / T 191 SJ 20873-2003 inclinometer general specification of Level
●The Academy of metrology and quality inspection Calibrated in accordance to: JJF1119-2004
Electronic Level calibration Specification
● Software development reference standard: GJB 2786A-2009 military software development General
requirements
● Product environmental testing standards: GJB150
● Electromagnetic anti-interference test standards: GB / T 17626
● Version:Ver.10
● Date:2018.04.13

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
General Description
ACA826T is a full temperature compensation & high accuracy dual-axis inclinometer which
professionally developed by Rion Company to the field of high precision level measurement and leveling
field , high resolution 0.0005 °, can completely replace the traditional high-precision level meter. Digital
signal transmission, matched with professional computer software, data measure and record
correctly ,output interface RS485, RS232, TTL, PWM or CAN 2.0B optional.Non-contact installation
features make ACA826T with superior system integration, convenient installation only need fix the sensor
on the measured surface by screws , then can automatically calculate the object horizontal inclined angle,
easy to use .With strong ability resistance to external electromagnetic interference and to withstand
shock and vibration,in the domestic counterparts products with absolute competitive advantage.
Features
●Dual-Axis Inclinometer ●Measuring Range :±1～±3° optional
●Size:L92×W48×H36mm ●Wide voltage input: 9～36V
●Wide temperature working: -40～+85℃●IP67 protection class
●Resolution: 0.0005° ●Water-proof air-plug
●Highly anti-vibration performance >2000g
●Output mode RS232、RS485、RS422、TTL、CAN 2.0 are optional
Application:
●Engineering vehicles automatic leveling ●Bridge & dam detection
●Laser equipment position ●Medical facilities angle control
●Underground drill posture navigation ● Railway gauging rule , gauge equipment leveling
●Precise machine tool level control ●Geological equipment inclined monitoring
●Directional satellite communications antenna pitching angle measurement

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
Ordering information:
E.g：ACA826T-01-232：Dual-axis/Standard/±01°Measuring range/RS232 output
Technical Data
Parameters
Conditions
ACA826T-03
ACA826T-10
ACA826T-15
unit
Measuring range
±03
±10
±15
°
Measuring axis
X Y
XY
X Y
Resolution
0.0005
0.0005
0.0005
°
Absolute accuracy
0.001
0.005
0.006
°
Long term stability
0.002
0.003
0.005
Zero
temperature
coefficient
-40～85°
±0.0008
±0.0008
±0.0008
°/℃
Sensitivity
temperature
coefficient
-40～85°
≤50
≤50
≤50
ppm/℃
Power on time
0.5
0.5
0.5
S
Response time
0.05
0.05
0.05
S
Output rate
5Hz、15Hz、35Hz、50Hz can be setting
Ouput signal
RS232/RS485/RS422/TTL/CAN
Electromagnetic
compatibility
According to EN61000 and GBT17626
MTBF
≥50000hours/times
Insulation
Resistance
≥100M
Shockproof
100g@11ms、Times/Axis(half sinusoid)
Anti-vibration
10grms、10～1000Hz
Protection glass
IP67
Cables
Standard 1M length、wearproof、wide temperature、
Shielded cables4*0.4mm2 air-plug connector
Weight
150g(without cable )

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
Electronic Characteristics
Parameters
Conditions
Min
Standard
Max
Unit
Power supply
Standard
9
12、24
36
V
customized
Other voltage
V
Working current
No-load
50
mA
Working temperature
-40
+85
℃
Store temperature
-55
+100
℃
Key words：
Resolution：Refers to the sensor in measuring range to detect and identify the smallest changed value.
Absolute accuracy：Refers to in the normal temperature circumstances,the sensor absolute linearity,
repeatability, hysteresis, zero deviation, and transverse error comprehensive error.
Long term stability : Refers to the sensors in normal temperature conditions, the deviation between the
maximum and minimum values after a year's long time work.
Response time：Refers to the sensor in an angle change, the sensor output value reached the
standard time required.
Mechanical Parameters
○ Connectors：1m cable with air-plug connector（customized）
○ Protection glass：IP67(air plug connector)
○ Enclosure material ：Aluminum Oxide
○ Installation ：4*M4 screws
2*3mm plug position(optional)
Working Principle
Adopt the European import of core control unit, using the capacitive micro pendulum principle and the
earth gravity principle, when the the inclination unit is tilted, the Earth's gravity on the corresponding
pendulum will produce a component of gravity, corresponding to the electric capacity will change, by
enlarge the amount of electric capacity , filtering and after conversion then get the inclination.

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
Measuring Directions&Fix
The installation must guarantee the product bottom is parallel to measured face，and reduce the influence
of dynamic and acceleration to the sensor. This product can be installed horizontally or mounted
vertically (mounted vertically selection is only applicable to the single axis), for installation please refer to
the following scheme.
Production installation notes :
Please follow the correct way to install tilt sensor, incorrect installation can cause measurement errors,
with particular attention to the "surface", "line":：1）The Sensor mounting surface and the measured
surface must be fixed closely, smoothly, stability,if mounting surface uneven likely to cause the sensor
to measure the angle error. See Figure Pic.AB
2) The sensor axis and the measured axis must be parallel ,the two axes do not produce the angle as
much as possible. See Figure Pic.CD

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
Dimension
Size：L92×W48×H36mm
Electrical Connection
1.RS232/RS485 Wiring
Line
color
function
BLACK
WHITE
BLUE
BROWN
GRAY
GND
Power Negative
RS232(RXD)
Or RS485(D+)
RS232(TXD)
Or RS485(D-)
Vcc 9～36V
Power supply positive
FACTORY
Use only

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
2.RS422 Wiring
1）8 core connector
2）leader cable
Line color
function
RED
BLUE
WHITE
PINK
YELLOW
BROWN
DC9~36V
TXD+
TXD-
RXD+
RXD-
GND

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
RION serial port tester software
You can download the RION angle debugging software from RION’s official website for the preliminary
angle debugging, also you Can download public version of the serial port assistant software on line for
using .
Open/Close：Open and close COM port;
Com: Select the the device corresponding to the COM port
Address: Fill in the sensor current address code, the factory default is 00
Set Address: Set the sensor address code input box on the right to enter the desired address code,
click Set Addr button
Save Data: Save the data, click here data can be synchronized Save angle data, the file is stored by
default in the C: ---- COMDATA file
Set Zero: Set relative zero, the sensor current angle is 00.00 degrees
Cancel Zero: Unset the relative zero, to restore the sensor to the factory absolute zero;
Baud Rate: Select the sense baud rate , the factory default is 9600;
Set Baud Rate: Set the sensor baud rate, on the right of the selection box to select corresponding baud
rate then click SetB.R. button;
Auto Output: Switch the sensor to automatically output mode, in the automatic output mode can be filled
with different output frequency in Hz;
Catechism: The sensor switch to answer pattern, such as choosing the answer type, must input “send
command ”( command, please refer to the specification ) on the left of “Send Command” input
box, but also can fill in the transmit frequency in the Send Data, the unit Hz;
Note: after install the RION’s debugging software, if can not open, please operate by the following steps
( please appear to the administrator status to operate ):
1）Copy these three files mscomm.srg、mscomm32.ocx、mscomm32.dep from the folder to
C:/Windows/system32 path below。
2）Click “Start” –“run” --regsvr32 mscomm32.ocx，You are prompted to install successful dialog。

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
Product Protocol
1.DATA FRAME FORMAT
（8 bits date，1 bit stop，No check，Default baud rate 9600）
Identifier
(1byte)
Date Length
(1byte)
Address code
(1byte)
Command word
(1byte)
Date domain
Check sum
(1byte)
68
Date format: hexadecimal
Identifier：Fixed68
Data length：From data length to check sum（including check sum）length
Address code：Accumulating module address，Default :00
Date domain will be changed according to the content and length of command word
Check sum：Data length、Address code、Command word and data domain sum,No carry.
2.COMMAND word analysis
Desc.
Meaning/Example
Description
0X04
Meanwhile read angle command
E.g: 68 04 00 04 08
Data domain(0byte)
No Data domain command
0X84
sensor data response
Eg:
68 10 00 84 00 00 20 08 10 00 25
28 10 35 00 80 DE
data field(9byte)
68 is prefix of data packets, fixed.
10 is data lenght, fixed.
00 is address code, revisable.
84 is command code, fixed.
00 00 20 08 the four red bytes are the X axis
returned angle value in compact BCD code. the high
order 0of first byte is sign bit(0: positive; 1:
negative), 00 0 are three digit integer value, 20 08
are four decimal digit. other axis data analysis
method is similar.
the angle is +000.2008 deg by analizing.
10 00 25 28, the four blue bytes are Y axis returned
angle value, analysis method is similar to X axis
10 35 00 80, the four green bytes are internal
temperature value, analysis method is similar to X
axis.
DE check sum, hexadecimal sum of all data,
exclude prefix 68,
if surpass one byte, pick low-order.
0X05
Setting relative/absolute ZERO:
Can set the current angle to
Zero degree, relative
measurement, can also be set to
absolute ex-factory zero, power off
save
E.g: 68 05 00 05 00 0A
Data domain
（1byte）
00: absolute ZERO
01: relative ZERO
0X85
Sensor answer reply command
Data domain（1byte）

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
E.g: 68 05 00 85 00 8A
Data domain in the number means the sensor
response results
00 Setting successfully
FF Setting failure
0X0B
Setting communication rate
E.g: 68 05 00 0B 03 13
The command setting is effective
after power off then restart
( power off with save function)
Data domain（1byte）
Baud rate：default :9600
00 means 2400
01 means 4800
02 means 9600
03 means 19200
04 means 38400
05 means 115200
0X8B
Sensor answer reply command
E.G:68 05 00 8B 90
Data domain（1byte）
Data domain in the number means the sensor
response results
00 Success FF Failure
0X0C
Setting sensor output mode
Response rule;
Need upper computer send
reading angle command , the
sensor answer
the corresponding angle
Automatic output rule:
The sensor with power on can
Automatically output X angle , The
output frequency base on what be
setted，if you need output High
frequency，please set baud rate as
115200
(Power off with save function)
E.g: 68 05 00 0C 00 11
Data domain
（1byte）Factory default: 00
00 Answer reply mode
01 5Hz Automatical output mode
02 15Hz Automatical output mode
03 25Hz Automatical output mode
04 35Hz Automatical output mode
05 50Hz Automatical output mode
0X8C
The sensor answer reply
command
E.g: 68 05 00 8C 00 91
Data domain（1byte）
Data domain in the number means the sensor
response results
00 Success FF Failure
0X0F
Setting module address
command
The sensor default address is 00,
1, such as a plurality of sensor
to be connected with a bus cable,
e.g RS485.requires each sensor is
set to a different address, in order
to achieve control and response
angle .
2, If successfully changed the new
address, follow all of the
commands and responding
Packet address code has to switch
to the new address code which
Data domain
（1byte）XX Module address
Address from 00 to EF range
Note: All products have a common address :FF,
If forget the address what has been set during
operation , can use FF address to operate the
product can still normally respond

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer
already changed then to be
effective, otherwise the sensor will
not respond to commands.(power
off with save function)
E.g: 68 05 00 0F 01 15
Setting the address to 01
68 05 FF 0F 00 13
Use the common address to reset
address to 00
0X8F
The sensor answer reply
command
E.g: 68 05 00 8F 94
Data domain（1byte）,
Data domain in the number means the sensor
response results
00 Success FF Failure
0X0D
Query relative/absolute ZERO
Used to query the sensor current
ZERO mode is relative ZERO
or absolute ZERO
E.g : 68 04 00 0D 11
Data domain（0byte）
No data domain commands
0X8D
The sensor answer reply
command
E.g:68 05 00 8D 00 92
Data domain (1byte）,
Data domain in the number means the sensor
response results
00 Absolute ZERO
01 Relative ZERO
※More products information, please refer to the company's Website : www.rion-tech.net
(Note: product functions, parameters and appearance will be adjusted as the technology is upgraded,
please confirm with the pre-sales business contact before purchase.)

ACA826T-High Accuracy Digital Type Dual-Axis Inclinometer