Author：
madshen Add Time：2014-04-02 20:29:52
Summary
MDS1028 Is a general intelligent two wire temperature Transmitter That can be used to detect the thermal resistance, thermocouple, resistance and MV signal, by the user PC The type and range of input configuration settings , and has excellent performance, reliability and anti-interference ability; widely used in various industrial applications.
The input signal and the basic error
MDS1028 | Input range | The basic error |
Input type | measuring range | Minimum range | absolute error | Spanerror |
heat electric Resistance | Pt 100 | -200 ~Eight hundred and fiftyC | Fifty C | . Zero point four C | + 0.2%F.S |
Pt 1000 | -200 ~Eight hundred and fiftyC | Fifty C | . Zero point six C | + 0.2%F.S |
Cu50 | -50 ~One hundred and fiftyC | Fifty C | . Zero point four C | + 0.2%F.S |
Cu100 | -50 ~One hundred and fiftyC | Fifty C | . Zero point four C | + 0.2%F.S |
Ni1000 | -60 ~Two hundred and fiftyC | Fifty C | . Zero point six C | + 0.2%F.S |
Linear resistance | 0-400. | 20. | 0.2. | + 0.2%F.S |
0-4000. | 100. | 0.5. | + 0.2%F.S |
heat electric even | K type | -200 ~One thousand three hundred and seventy-two C | Fifty C | . One C | + 0.2%F.S |
S type | Zero ~One thousand seven hundred and sixty-eight C | Two hundredC | . ThreeC | + 0.2%F.S |
E type | -200 ~One thousandC | Fifty C | . One C | + 0.2%F.S |
B type | One hundred~ One thousand eight hundred and twenty C | Two hundredC | . ThreeC | + 0.2%F.S |
R type | Zero ~One thousand seven hundred and sixty-eight C | Two hundredC | . ThreeC | + 0.2%F.S |
T type | -200 ~Four hundredC | Fifty C | . One C | + 0.2%F.S |
J type | -200 ~One thousand and two hundredC | Fifty C | . One C | + 0.2%F.S |
N type | -200 ~One thousand and three hundredC | Fifty C | . One point five C | + 0.2%F.S |
Millivolt | -10 ~100mV | 10mV | 40uV | + 0.2%F.S |
Remarks： One The ambient temperature accuracy test 25. Two C 24V.Power supply voltage, Two hundred and fifty Load;
Two And when the actual application of the maximum error and absolute error of range error.
The working power supply
Power supply voltage: Eight ~ 36V
Power supply ripple: V P-P < 1%
Effect of power supply voltage: < 0.002% F.S /V
insulation
Insulation resistance: More than 500M Omega ( 500VAC )
Insulation strength: 1500VAC/60s (leakage current is less than 1.0mA)
input
Input signal: thermal resistance, thermocouple, resistance and MV signal
See the specific The input signal and the basic error
output
Two Wire 4-20mA The output, the output signal is linear with the input signal
Linear output range: 3.9 mA Less than or equal to I Less than or equal to 21.0mA
Low fault alarm value: Three point five ~ Three point eight (mA Factory default 3.8mA The user can configure. )
High fault alarm value: Twenty-one ~ Twenty-two (mA Factory default22mA The user can configure. )
Output ripple: V P-P Less than or equal to 20mV
The basic error
The basic error : Less than or equal to + 0.2% F.S ( See the specificThe input signal and the basic error)
temperature drift
temperature drift : Less than or equal to + 0.01% F.S/ C
Maximum load
Maximum load resistance (= Power supply voltage - 8V) / 0.022A .
When the power supply voltage 24V When the maximum load is 727.
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 input, user configurable, default three wire
The related parameters of thermocouple
Cold end compensation: internal or external compensation, user configurable, default internal compensation
The internal compensation accuracy is not higher than 0.5 deg (0 ~ 70 (c) is not higher than 1 DEG -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 (T90)
The damping parameter is 0, the response time is less than 1s
For details please download: MDS1028 two wire intelligent temperature Transmitter
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