Microsensor MPM Series User manual

V2.0
MPM/MDM Transmitting Controller
series operation manual

I
Contents
1.Introduction........................................................................................... 1
2.Safety alarm...........................................................................................2
3.Specification..........................................................................................2
4.Outline construction...........................................................................4
5. Electric connection............................................................................ 9
6. Calibration...........................................................................................11
7.Installation........................................................................................... 13
8.Communication protocol................................................................ 15
9.Responsibility.....................................................................................17
Our company reserves the right to modify this manual due to product
technique and process updates. If any information is modified, we will not
make further notice.
Please pay attention to the latest version.
Our company reserves the right of final interpretation of this manual.

1
Thanks for selecting our products. Please read this manual carefully
before operation.
1. Introduction
MPM/MDM series transmitting controllers are multi-functional
instruments for pressure, differential pressure and level measurement
and control which consists of MPM/MDM484C, MPM/MDM460,
MPM460W, MPM/MDM484ZL. This series of products are all-electronic
structure, which can measure, display and control on-site pressure,
differential pressure and level. It could output standard signals, and
realize network transmission and remote setting and calibration for
transmitting controllers’ parameters based on RS485 (Modbus RTU
protocol) bus. With easy operation and calibration, it is widely used in
various industries like hydro-power, tap water, water treatment,
petroleum, chemical industry, metallurgy, etc. It can realize the
measurement, display and control of pressure, differential pressure and
liquid level of fluid medium.
Features
High-precision AD conversion circuit, microprocessor processing data
Convenient for networking and data transmission, long-distance
calibration and setup available

2
Main and secondary screens are displayed simultaneously (484C
has main screen only)
Parameters setting and calibration by keys, easy to operate
Analog output and RS485 interface (Modbus RTU protocol) available
Max. 8-way control (460 series), high controlling accuracy
Return difference setting for each controlling contact to avoid contact
chattering, stable operation
2. Safety alarm
Please read this manual carefully before operation and make
the connection according to the electrical definition of each
product.
Do not calibrate the transmitter when there is no standard
pressure source. If you need to adjust it, please operate it by
professional persons
Please do not touch the corrugated diaphragm with your
hands or sharp objects to avoid damaging the sensor.
In case of strong interference, the housing should be well
grounded.
3. Specification
Measured range:
Level: 0m~1m…200mH2O (only MPM460W)

3
Pressure: -100kPa…0kPa~10kPa…100MPa
Differential pressure: 0kPa~50kPa…3.5MPa
Overpressure:
Level: 1.5 times FS
Pressure: 1.5 times FS or 110MPa (min. value is valid)
Differential pressure: static pressure ≤20MPa
Power supply: 220V AC/110~370V DC/24V DC
Output signal:
Analog output: 4mA~20mA DC,0mA~10/20mA DC,
0/1V~5/10V DC
Digital output: RS485 interface (Modbus RTU protocol)
Environmental temp.: -10℃~60℃
Media temp.: -10℃~80℃
Storage temp.: -40℃~80℃(460W wetted parts -20℃~80℃)
Relative humidity: 0%~80%
Vibration: acceleration≤3g, frequency 0Hz~300Hz
Shock: ≤10g
Stability: ≤±0.3%/year
Max. Power consumption: ≤3.5W (460 series 5~8 relay ≤5W)
Accuracy: ≤±0.25%FS (typ.) ≤±0.5%FS (max.)
Relay load: 240V/3A AC or 30V/3A DC
Contact life: >100000 times
Main screen: 0.56” (460 series, 484C series) or 0.8” (484ZL series)

4
Secondary screen: 0.36” (460 series,484ZL series)
Display range: -1999~9999 (red highlight LED)
Digital part: sampling rate:10 times/s
Relay qty.:1~5 (484C series,484ZL series) 1~8(460 series)
Installation method: vertical and Horizontal
mounting (MPM484ZL, MPM484C), submersible
Protection: IP65:MPM460(W) and MDM460 display housing
IP68:MPM460W sensor
4. Outline construction
4.1. Construction material
Pressure port: stainless steel
Diaphragm: 316L stainless steel
Electric housing: stainless steel(484C, 484zl front shell)
aluminium alloy (460,484zl bottom shell)
Seal method: NBR, full-welded
4.2. Pressure port
Standard gauge: M20x1.5 male .etc
Standard differential pressure: G1/4 female
Standard level(460W): sensor part is submersible transducer
4.3. Outline
a) MPM/MDM484C series

5
MPM484C Pressure Transmitting Controller
MDM484C Differential Pressure Transmitting Controller
kPa
φ100
49
M20×1.5
φ6
22
2
(60)
(160)
SW27
φ100
49
kPa
(160)
13 33 13
8
(60)
φ27
φ30 φ40
22
G1/4
φ100
49
kPa
(160)
13 33 13
8
(60)
φ27
φ30 φ40
22
G1/4

6
MPM484C Pressure Transmitting Controller (Horizontal mounting)
b) MPM460, MDM460, MPM460W outline
MPM460 Pressure Transmitting Controller
49
kPa
φ116
2
φ6
M20×1.5 33
SW27
22
(60)
2
φ100 φ130
120°
120°
3-φ3.5 EQS
M20×1.5
12
(150)
SW24
60
27 15
（175）
80
125
φ27
MPa

7
MDM460 Differential Pressure Transmitting Controller
MPM460W Transmitting Transmitter MPM460WK Transmitting Controller
33
φ30
13 13
φ40
(162)
8
22
SW24
125
（175）
80
60
27 15
φ27
G1/4
KPa
φ 18
L
φ 140
M42× 1.5
SW48
SW36
φ 26
57.5
SW24
125
（ 175）
80
mH 20
(110)
125
SW24
80
（175）
m H2O
φ 27
L(length)
φ 26
(100)

8
c) MPM484ZL, MDM484ZL:
MPM484ZL Pressure Transmitting Controller
MDM484ZL Differential Pressure Transmitting Controller (vertical mounting)
terminal
cover
MPa
(220)
M20×1.5
φ6
22
68
φ150
5015
SW27
name
plate
50
cover
terminal
15
MPa
(240)
φ150
φ30
13
φ40
φ27
33 13
822
G1/4
(90)
name
plate

9
MPM484ZL Pressure Transmitting Controller (horizontal mounting)
Note: The pressure port dimension of controllers for vertical and horizontal
mountings is the same.
5. Electric connection
5.1 MPM/MDM484C series
1, 2, 3: NC, NO and COM of relay 1;
4, 5, 6: NC, NO and COM of relay 2;
19, 20, 21: NC, NO and COM of relay 3;
13,14,15: NC, NO and COM of relay 5;
MPa terminal
cover
φ150
5015
φ180
2
φ168
3-φ6 EQS
M20×1.5
(68)
φ6
22
SW27
50
120°
120°
name
plate

10
16,17,18: NC, NO and COM of relay 4;
7, 8: analog output terminal;
9,10: RS485 communication terminal;
11,12: AC/DC supply terminal;
Notes: if the relay qty. is <2, there is no dotted box part (13~24).
5.2 MPM460, MPM460W, MDM460 inner electric connection
Note: 1. After the wiring is completed, lock the cable and restore the front panel as it
is to maintain the original protection level of the product.
2.Wire diameter of connection terminal is 0.2 mm2~1.5mm2.
5.3 MPM/MDM484ZL

11
10,11,12: NO, COM and NC of relay 1;
4, 5, 6: NO, COM and NC of relay 2;
4, 5, 6: NO, COM and NC of relay 3;
1, 2, 3: NO, COM and NC of relay 4;
22, 23, 24: NO, COM and NC of relay 5;
7, 8, 9: NO, COM and NC of relay 2;
13, 14: RS485 communication terminal;
15, 16: analog output terminal;
17, 18: 24VDC supply terminal;
19: connected to housing ;
20, 21: 220VAC supply terminal.
Note:
1. please do not use AC 220V and DC 24V at the same time;
2. if there is no need for terminal’s function in purchase order, the
terminal will not connect with any circuit. It’s null;
3. Terminal 19# is for grounding, if necessary, please connect
grounding wire reliably;
4. please power on after checking system and circuit.
6. Key Calibration
6.1. Indicator and key introduction
Indicator includes main indicator and deputy indicator (not including
484C series). Main indicator displays current measuring pressure value

12
at measurement status; displays current parameter virtual value at setup
status. In all states, the secondary display shows the current system
status or limit value and cannot be changed individually. There are three
keys on frond board, ▲, SET, and ▼ keys.
6.2 Key operation flow
PASS 1993 Unit Unit
Addr
bAUd
-dP-
P-SL
P-SH
P-OH
P-OL
AL-4
AL4F
AL-5
AL5F
AL-6
AL6F
AL-7
AL7F
AL-8
AL8F
S--c
F--L
AL-1
AL1F
FAct
long press key“Set”for 3s normal measurement
-End END
AL-3
AL3F
AL-2
AL2F
XXXX
or
Address
Baud rate
Decimal
Point
Zero
Display
Full span
Display
Relay 1
Property
Relay 2
Relay 3
Relay 4
Relay 5
Relay 6
Relay 7
Relay 8
Hysterisis
common
Property
Property
Property
Property
Property
Property
Property
Return
Factory
Zero output
Display
output
Display
Full span
Relay 1
control
point
Relay 2
control
point
Relay 3
control
point
Relay 4
control
point
Relay 5
control
point
Relay 6
control
point
Relay 7
control
point
Relay 8
control
point
screen
Display
Second

13
Note:
1.MPM484ZL has no“AL-6” to“AL-8F”; MPM484C has no“AL-6”to“AL-8F”,“F--L” and
deputy display. All the information will be shown on main display if it has no deputy
display;
2.Baud rate: 0/1200,1/2400,2/4800,3/9600,4/19200,5/38400,6/57600,7/115200;
3.Relay property: “0” indicates the lower limit alarm, “1” indicates upper limit alarm;
4. “Zero output display” and “span output display” Used to adjust the output analog
quantity, The default is consistent with "zero display" and "full display";
5. "Common hysterisis" : it is used to eliminate the jitter of pressure at the critical
point of limit value, and the default value is 0;
6. "Second screen display": 0(default) Display "U--U"; 1~5(484ZL)/1~8(460) display
the corresponding limit value, 6 and 7(484ZL)/ 9 and 10 (460) display the zero
display and full span value;
7."Return factory" : set "1" and press the "confirm" button, the meter will immediately
restore the factory Settings, the default is "0" FAct indicates menu entering, “1”
means “restore to factory”. Default is “0”.
7. Installation
7.1 MPM484C, MPM460, MPM484ZL
The pressure port for MPM484C, MPM460, MPM484ZL controllers is
M20x1.5 male waterline seal. For flush diaphragm transmitting controller,
pressure port is G1/2 male with seal cushion. The controller could be
installed to flange connector on measuring tube directly. Please add

14
cut-off valve between flange connector and tube for easy installation and
repair.
There is one nylon protection cap on the pressure port of flush
diaphragm type controllers. Please do not take off the cap to protect
diaphragm if the user does not install.
Please mount controller to pressure port M20X1.5 female, the screw
depth should be less than 20mm (there should be a seal-ring on the type
face). Pressure port G1/2 female’s depth should be no less than 15mm.
Please do not wrap tape on pressure port G1/2 male to seal. This would
affect product stability or damage product.
7.2 MDM484C, MDM484ZL, MDM460
The pressure ports for standard MDM484A, MDM484ZL differential
pressure controller are two G1/4 female. Marked with “+“ is high (positive)
pressure side; marked with “-“ is low (negative) pressure side. The
transmitter should be connected to process tube together with 3 valve
manifolds by pressure leading tube. Pressure leading tube’s high
(positive) pressure side connects to pressure port marked “+”; pressure
leading tube’s low (negative) pressure side connects to pressure port
marked “-”. Please make two pressure port horizontal for right installation
position, and make indicator facts to worker directly.
For normal operation and easy installation, please install 3 valve

15
manifolds between controller and measuring point; pressure port G1/4
male’s length should be no more than 12mm, and sealed by seal
cushion.
Note：
(1) process operation pressure should be no more than 20MPa.
(2) the measured media differential pressure should not exceed upper limit
pressure.
(3) Open 3 valve manifold to prevent that one single pressure acts on transmitting
controller to protect product.
(4) Media should be compatible with construction material.
(5) Pressure port marked with “+” and ”-”. This will keep correct connection.
7.3 MPM460W
Standard MPM460W level transmitting controller is submersible type and
the installation direction is vertical down.
8. Communication protocol
The products uses standard Modbus RTU protocol (03: read register，
06: set single register).
Table 8.1 Data format
Start
Add.
Fun.
code
Date
CRC
check
End
T1–T2–T3–T4
8 BITS
8 BITS
n x 8 BITS
16 BITS
T1–T2–T3–T4
Table 8.2 Common register list

16
Name
Registe
r add.
Name
Register
add.
Name
Register
add.
Add.
0001
2nd limit
character
0014
6th limit
value
001C
baud rate
0002
3rd limit
value
0016
6th limit
character
001D
Real-time
value
000F
3rd limit
character
0017
7th limit
value
001E
Decimal
point
0010
4th limit
value
0018
7th limit
character
001F
1st limit
value
0011
4th limit
character
0019
8th limit
value
0020
1st limit
character
0012
5th limit
value
001A
8th limit
character
0021
2nd limit
value
0013
5th limit
character
001B
common
hysterisis
0015
Deputy
display set
0022
User set
save
0025
Return to
factory
0027
Table 8.3 Common used register sample
Register
addr.
Explanation
Send command
Answer command
0001
Read addr.
00 03 00 01 00 01 D4 1B
05 03 02 00 05 89 87
Change addr.
05 06 00 01 00 02 58 4F
02 06 00 01 00 02 59 F8
000F
Read pressure
value
02 03 00 0F 00 01 B4 3A
02 03 02 03 F9 3C F6
0027
Return to factory
02 06 00 27 00 01 F8 32
02 06 00 0F 00 66 39 D0
000F
Read pressure
data
02 03 00 0F 00 02 F4 3B
02 03 04 03 E9 00 02 99
42

17
Analysis: byte number:0x04(4) 1:03 E9 (1001) 2:00 02 (2)
Pressure value =1001*0.01=10.01
Note: The pressure value read is hexadecimal number, convert it to decimal number,
divided by the decimal point value (0: divided by 1; 1: divided by 10; 2: divided by
100; 3: divided by 1000) and then get real-time pressure values.
9. Responsibility
Within one year from the delivery date, we shall repair or replace the
instrument with any quality fault caused by material parts or our
manufacturing technique free of charge. For non-quality malfunction
during user’s operation, we are in charge of repair. But the material cost
and the shuttle transportation fees should be borne by users.