General Measure M02 User manual

Model no.: M02
Us e r ’s Ma n ua l
M02-00150101
48011201231000
110609010008

©2015, Shenzhen General Measure Technology Stock Co., Ltd reserves all copyright.
Without permission from Shenzhen General Measure Technology Stock Co., Ltd.,
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with our service person to get update information.
Website: http://www.szgmt.com.cn

CONTENTS
1 General Description....................................................................................... 1
1.1 Functions and Characteristics ....................................................... 1
1.2 Front Panel......................................................................................... 2
1.3 Technical Specifications................................................................... 3
1.3.1 Common.................................................................................3
1.3.2 Analog.....................................................................................4
1.3.3 Digital......................................................................................4
2 Installation and Wiring................................................................................... 5
2.1 Connection of Power Supply........................................................... 5
2.2 Connection of Load Cell................................................................... 5
2.2.1 6-wired Connection.............................................................. 6
2.3 I/O terminals....................................................................................... 7
2.4 Optional Expansion Board Output.................................................. 8
2.4.1 Analog Output (Optional)）................................................. 8
2.4.2 Serial Interface RS485 Output..........................................11
2.4.3 Serial Interface RS232 Output......................................... 12

3 Calibration..................................................................................................... 13
3.1 Instruction......................................................................................... 13
3.2 Flow Chart of Calibration............................................................... 14
3.3 Millivolt Value Display..................................................................... 20
3.4 Calibration with Weights.................................................................20
3.5 Millivolt Calibration.......................................................................... 20
3.6 Calibration Switch for Communication Interface........................ 22
3.7 Explanation for Calibration Parameters.......................................23
4 Working Parameters Setting...................................................................... 25
4.1 Flow Chart of Working Parameters Setting.................................25
4.2 Parameter Setting Method.............................................................27
4.3 Descriptions of Operation Parameters........................................ 28
4.4 Set point parameters...................................................................... 31
5 I/O Definition................................................................................................. 33
5.1 I/O Definition.................................................................................... 33
5.2 I/O testing......................................................................................... 35
6 Serial Communication................................................................................. 36

6.1 r-Cont................................................................................................ 37
6.2 r-SP1................................................................................................. 37
6.2.1 Parameters Code Chart.................................................... 37
6.2.2 Error Code Explanation..................................................... 40
6.2.3 Command............................................................................ 40
6.3 tt TOLEDO........................................................................................48
6.4 Cb920................................................................................................49
6.5 rECont............................................................................................... 50
6.6 rEREAD............................................................................................ 51
6.7 Modbus............................................................................................. 52
6.7.1 Modbus Communication Address.................................... 53
7 Password Input and Setting, Reset.......................................................... 60
7.1 Password Input................................................................................60
7.2 Password Setting............................................................................ 60
7.3 Factory Reset.................................................................................. 62
8 Display Testing............................................................................................. 64
9 Errors and Alarm Messages.......................................................................65
10 Dimension of Indicator.............................................................................. 66

M02 Digital Indicator
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1 General Description
M02 weighing indicator is specially designed for weight transmitting in industrial
fields.
This indicator has the features of small volume, plenty communicating commands,
stable performance, easy operation and practicability. It can be widely applied to
concrete and bitumen mixing equipment, metallurgy furnace and converter, chemical
industry and feed, etc. .
1.1 Functions and Characteristics
Small volume, unique design, easy operation
Applicable to all kinds of resistance strain gauge bridge load cell
Front panel numerical calibration
Multilevel of digital filter
Automatic zero -tracking
Automatically zero when powered on
4 set points
1 input and 2 outputs
Serial communication interface:RS232 or RS485
Calibration via serial interface
Optional interfaces: Analog output, serial interface

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1.2 Front Panel
M02 Front panel
Main Display:6 digits, for displaying weight and the information of parameters.
Status Indicator Lamp:
ZERO: Light on when present weight is within 0±1/4d.
STAB: Light on when changes of weight values are within the range of motion
detecting during motion detecting time.
HOLD: Light on when indicator displays the value of D/A output.
Keypad:

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: Zero/Esc, Used to exit from current operation or go previous.
: Used to scroll optional values of parameter and to make flashing digit
increase 1 while data inputting.
: Function Selecting Key, To make flashing position move to the right digit
when data inputting.
: Confirming Key. Used to confirm present operation.
1.3 Technical Specifications
1.3.1 Common:
Power supply: DC24V±5%
Working temperature: -10～40℃
Max humidity: 90%R.H without dew
Power consumption: About 10W
Dimension: 105×89×57（mm）

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1.3.2 Analog:
Load cell power: DC5V 200mA（MAX）
Input impedance: 10MΩ
Zero steady range: 0.00～12mV(Load cell 3mV/V)
Input sensitivity: 0.1uV/d
Input range: 0.00～15mV(Load cell 3mV/V)
Transfer mode: Sigma - Delta
A/D conversion speed: 15, 30, 60, 120, 480, 960 times/sec
Non-linearity: 0.01% F.S
Gain drift: 10PPM/℃
Display Precision: 1/100,000
1.3.3 Digital:
Weight display: 6 digits red high-brightness LED
Minus display: “-”
Overload display: “OFL”
Decimal point: 5 kinds (optional)
Function keys: 4 keys soniferous keypad

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2 Installation and Wiring
2.1 Connection of Power Supply
M02 weighing indicator connects DC24V power supply as follows:
Power supply connection
2.2 Connection of Load Cell
M02 weighing indicator connects bridge type resistance strain gauge load
cells by 6 wires or 4 wires as follows. When you use 4-wired load cells, you must
bridge the SN+ with EX+ and bridge the SN- with EX-.
The signal definition of each port of the load cell connector is as follows:
EX+: Excitation+ EX-: Excitation- SN+:Sense+ SN-: Sense- SIG+: Signal+ SIG-: Signal-

M02 Digital Indicator
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6 wires
EX+
SN+
EX-
SN-
SIG+
SIG-
Shield
4 wires
EX+
EX-
SIG+
SIG-
Shield
2.2.1 6 wires connection
Note:
1. As load cell output sensitive analog signal, please use shield cable to separate
with other cables, especially AC power.
2. 4 wires connection is suitable for short distance and stable temperature or low
precision field, otherwise use 6 wires connection.
3. For more load cells parallel connection, their sensitivity (mV/V) should be same.

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2.3 I/O terminals
I/O tolerant definition as follows:
Indicator input terminal connection:
Indicator input terminal connection:
Output
Input
OUT1
Stable
IN1
Reset
all
OUT2
OFL

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2.4 Optional Expansion Board Output
M02 weighing indicator supports analog output, RS232 or RS485 as optional
output function, please confirm it when place orders.
2.4.1 Analog Output (Optional)
At normal displaying status, press to check the analog output.
The definition of analog output as below:

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Analog output two types:
1) Voltage output: 0-5V/0-10V is optional .
2) Electric current output: 4-20mA/0-20mA/0-24mA is optional.
3) User-define function, users can define analog output type and output range.
The analog output has been calibrated before the delivery of the indicators, so
users do not need to make calibration. If analog output is abnormal, users can
calibrate by themselves as follows:（Suggestion: please calibrate under the
instruction of professionals)
The definition of analog output:
V+: voltage-output+, V-: voltage-output-
I+: current-output +, I-: current-output -
Note: only support calibration under current
mode. 4 points must be finished for current
calibration.
SET UP
Normal display status

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and
Current calibration interface
In this interface，the
multimeter measured
should be 4.000mA.
Measured 4.000mA
If not,press
If yes,press
In this interface，the
multimeter measured
should be 4.000mA.
This interface is current DA
D/A,press to adjust the value,
and the current value measured will
vary accordingly.To adjust it when the
measured value to be 4.000mA, then
press to save and exit.
Then press to calibrate
12.000mA.
Finish the calibration referring to the process of
4.000mA calibration, and the same for the
calibration of 20mA.

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In the interface of highest point calibration,press to enter into analog
display value interface, the display will be 5 digits (initial value is 24000, means
24.000mA),press to input the value measured by the multimeter.
Note: Analog output calibration, highest point must be calibrated.
2.4.2 Serial Interface RS485 Output
Serial Interface RS485 output is optional, please refer to chapter 6.0 for
communication protocol.
RS485 serial interface connection:
This interface is the highest
point calibration of analog
output.

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2.4.3 Serial Interface RS232 output (Optional)
RS232 serial interface connection:

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3 Calibration
3.1 Instruction
（1）Calibration procedure must be executed when a M02 indicator is put in use at the
first time, the preset parameters may no longer meet the user’s needs, and any part of
the weighing system was changed. Position of decimal point, minimum division,
maximum capacity, zero, and gain can be set and confirmed through calibration.
（2）If you want to set only one parameter, please press to save parameter’s
value and then press to exit.
（3）Please see section 3.7 for parameters’ instruction.
（4）Please record each value in the blank table in section 3.4 during calibration for the
emergency use in future.
（5）See chapter 9for error alarm message that may be displayed during calibration.

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3.2 Flow Chart of Calibration
Normal Status
Password input
Decimal point
2. After password is input, the indicator will
display CALON for one second, then go to
next step.
3. Press to select a desired value for
decimal point among 0,
0.0, 0.00, 0.000 and 0.0000, and then
press to save it and enter next step.
If there’s no need to change the value,
press directly to enter next step.
1. Under this status, press (twice),
indicator will display CAL, then
press to enter password input.

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Min. divistion
4. Press to select a desired value for min.
division among 1,2,
5,10,20 and 50, and then to save it and enter next
step.
If there’s no need to change the value, then
press directly to enter next step.
Max. capacity
5. Input max. capacity(≤min. division×100000),
press to save it and enter next step.
If there’s no need to change the value, then
press directly to enter next step.
Millivolt value display
6. Under this status, press to enter zero
calibration.
Display value near the output value in millivolt
between SIG+/SIG- of load cell.
See section 3.3 for details about this function.