Author：
madshen Add Time：2014-04-02 20:57:17
Summary
MDS1088 is a HART type two wire temperature Transmitter That can be used to detect the thermal resistance, thermocouple, resistance and MV signal, the output of 4-20mA and standard HART signal, and has excellent performance, reliability and anti-interference ability; widely used in various industrial applications.
Characteristic
The general thermal resistance, thermocouple
Can be through a variety of Hart equipment configuration
The input and output electromagnetic isolation
The built-in high precision cold end compensation
Dynamic configuration data - storage
24 - bit digital conversion based on digital linearization technique, high precision
The vacuum pouring process, earthquake proof
The electromagnetic compatibility with EN 61326 and EN21
- suitable for installation in the standard junction box (DIN B).
The input signal and the basic error
MDS1088 | Input range | The basic error |
Input type | measuring range | Minimum range | absolute error | Spanerror |
heat electric Resistance | Pt 100 | -200 ~Eight hundred and fiftyC | TwentyC | . Zero point two C | + 0.1%F.S |
Pt 1000 | -200 ~Eight hundred and fiftyC | TwentyC | . Zero point three C | + 0.1%F.S |
Cu50 | -50 ~One hundred and fiftyC | TwentyC | . Zero point two C | + 0.1%F.S |
Cu100 | -50 ~One hundred and fiftyC | TwentyC | . Zero point two C | + 0.1%F.S |
Ni1000 | -60 ~Two hundred and fiftyC | TwentyC | . Zero point three C | + 0.1%F.S |
Linear resistance | 0-400. | 10. | 0.1. | + 0.1%F.S |
0-4000. | 100. | 0.25. | + 0.1%F.S |
heat electric even | K type | -200 ~One thousand three hundred and seventy-two C | Fifty C | . Zero point five C | + 0.1%F.S |
S type | Zero ~One thousand seven hundred and sixty-eight C | Two hundredC | . One point five C | + 0.1%F.S |
E type | -200 ~One thousandC | Fifty C | . Zero point five C | + 0.1%F.S |
B type | One hundred~ One thousand eight hundred and twenty C | Two hundredC | . One point five C | + 0.1%F.S |
R type | Zero ~One thousand seven hundred and sixty-eight C | Two hundredC | . One point five C | + 0.1%F.S |
T type | -200 ~Four hundredC | Fifty C | . Zero point five C | + 0.1%F.S |
J type | -200 ~One thousand and two hundredC | Fifty C | . Zero point five C | + 0.1%F.S |
N type | -200 ~One thousand and three hundredC | Fifty C | . One C | + 0.1%F.S |
Millivolt | -10 ~100mV | 5mV | 30uV | + 0.1%F.S |
Remarks：
1, the precision of test environment temperature 25 - 2 DEG C, 24V power supply, 250 ohm load;
The maximum value of 2, the actual application error and absolute error of range error;
work environment
Working temperature: -40 to 85 DEG C
Storage temperature: -50 to 120 DEG C
Relative humidity: 0 ~ 95%RH allows setting
Atmospheric pressure: 86 ~ 106kPa
The working power supply
Supply voltage: 12 ~ 40V
The power ripple: Vp-p < 1%
Supply voltage: F.S < 0.002% /V effect
insulation
Insulation resistance: 500M ohm (500VAC)
Dielectric strength: 1500VAC/60s (leakage current less than 1.0mA)
input
Input signal: thermal resistance, thermocouple, resistance and MV signal
See the specific input signal and basic error
output
2 wire 4-20mA and standard HART digital signal output
The linear range of output: 3.9 mA = I = 21.0mA
Low fault alarm value: 3.5 ~ 3.8mA (default 3.8mA, user configurable)
High fault alarm value: 21 ~ 22.0mA (default 22mA, user configurable)
Output: Vp-p = 20mV
The basic error
The basic error : Less than or equal to + 0.1% F.S ( See the specific The input signal and the basic error)
temperature drifttemperature drift : Less than or equal to + 0.005% F.S/ C
Maximum load
The maximum load resistance (supply voltage = - 12V / 0.022A).
When the supply voltage is 24V, the maximum load is 545 ohms
Thermal resistance parameters
allow sensor The largest single cable line resistance: 10 ohms
sensor Cable resistance: 0.05 /10 ohm.
The thermal resistance of the excitation current: less than 250uA
Thermal resistance connection: two wire or three wire or four wire input, three wire input default
The related parameters of thermocouple
Cold end compensation: internal or external compensation, user configurable, default internal compensation
Internal compensation accuracy: less than or equal to 0.5 DEG C (-40 to 85 DEG C)Damping parameters
0 ~ 60s, user configurable, default is 0.0s
Start time
Transmitter When the power supply is switched on after 5 minutes can reach the performance specifications range
(response time T Ninety )
The damping parameter is 0, the response time is less than 1s
For details please download:MDS1088 two wire intelligent temperatureTransmitter
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