MESO-H/MESO-HX TEMPERATURE TRANSMITTERS
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MESO-H is a Smart and universal, isolated 2-wire In-head transmitter for temperature and other measurement applications.
MESO-HX is the Intrinsically Safe version for use in Ex-applications.
MESO-H and MESO-HX are fully HART-compatible, with communication through the HART protocol, directly on the 4-20 mA output loop, by using either a general hand-held HART Communicator or the PC software, MEPRO 2.
MEPRO 2 is a Windows based and user friendly software, which facilitates the access to and use of functions like transmitter configuration, documentation, monitoring and calibration.
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| Performance and design |
Excellent stability
Long-term stability 0.1% year.
Enhanced total system accuracy
Sensor error correction (compensates for known sensor errors).
Input-Output isolation 1500 VAC
Eliminates measuring errors due to ground loops.
High load capacity
Only 10 V voltage drop over the transmitter (MESO-H) allows for high loads.
Designed for harsh conditions
Operation temperature:
Up to 85 C/ 185 F
(105 C/221 F on request)
Excellent EMC performance.
Durable, shockproof design.
Simple mounting and connection
For DIN B head or larger.
Large center hole (dia. 7 mm/ 0.28 inch).
5 year limited warranty
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| Functions |
Fully HART® Compatible
True on-line communication with hand-held HART Communicator or Windows software MEPRO 2.
Input for RTDs, T/Cs, mV and resistance
Reduced inventory costs.
Simplified plant engineering.
Efficient customized 50-point Linearization
Any sensor characteristics can be matched.
Sensor diagnostics
SmartSense detects low sensor isolation (essential for correct measurements)
Selectable sensor break action.
Simplified loop check-up.
The transmitter works as an accurate current generator.
On-screen indications of input and output
Valuable tools for temporary measurements.
Improved QA with data storage
Vital information, such as TAG-No., maintenance record etc. can be stored in the nonvolatile memory.
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| Input |
| RTD's and Resistance |
Pt100 (IEC751, = 0.00385) |
3-, 4-wire Connection |
-200 to +1000 degrees C/-328 to +1832 degrees F |
| Pt1000 (IEC751,= 0.00385 |
3-, 4-wire Connection |
-200 to +200 degrees C/-328 to +392 degrees F |
| PtX 10 < X < 1000 (IEC751,= 0.00385 |
3-, 4-wire Connection |
Upper range depending on X-value |
| Ni100 (DIN 43760) |
3-, 4-wire Connection |
-60 to +250 degrees C/-76 to +482 degrees F |
| Ni1000 (DIN 43760) |
3-, 4-wire Connection |
-60 to +150 degrees C/-76 to +302 degrees F |
| D100 (Pt 100 acc. to JIS1604) |
3-, 4-wire Connection |
-200 to +1000 degrees C/-328 to +1832 degrees F |
| Potentiometer/resistance |
3-, 4-wire Connection |
0 to 2000  |
| Sensor current |
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~0.4 mA |
| Maximum sensor wire resistance |
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25 /wire |
| Thermocouples and Voltage |
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| T/C |
Type: AE,B,E,J,K,L,N,R,S,T,U |
Ranges according to user's manual |
| Voltage input |
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-10 to +500 mV |
| Input impedance |
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> 10 M |
| Maximum sensor wire resistance |
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500 (total loop) |
| Monitoring |
| Sensor break monitoring |
User definable output |
3.6 to 22.8 mA |
| Smartsense, sensor isolation |
User definable output |
3.6 to 22.8 mA |
| Adjustments |
| Zero adjustment |
All inputs |
Any value within range limits |
| Minimum spans |
Pt100, Pt1000, Ni100, Ni1000 |
10 degrees C/18 degrees F |
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Potentiometer |
10 |
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T/C, mV |
2 mV |
| Output |
| Straight,reversed or intermediate |
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4-20/20-4 mA |
| Resolution |
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5  A |
| Minimum output signal |
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~3.6 mA |
| Maximum output signal |
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~23 mA |
| Permissible load |
MESO-H |
610 @ 24 VDC, 23 mA 1) |
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MESO-HX |
520 @ 24 VDC, 23 mA 1) |
| Accuracy |
| Linearity |
RTD Potentiometer, mV |
+0.1% 1) |
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T/C |
+0.1% 1) |
| Calibration |
RTD |
+0.2 degrees C/ +0.4 degrees F or +0.1%1) |
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Potentiometer |
+0.1 or +0.1%1) |
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mV, T/C |
+20 V or +0.1%1) |
| Cold Junction Compensation |
T/C |
+0.5 degrees C/ +0.9 degrees F |
| Temperature influence 4) |
All inputs |
Max +0.25 C/ 25 C or +0.25%/25 C 1) 3) |
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Max +0.5 F/ 50 F or +0.28%/50 F 1) 3) |
| Temperature influence CJC 4) |
T/C |
Max +0.5 C/ 25 C/+1.0 F/50 F |
| Instrument calibration output |
4-20 mA |
+8 A |
| Sensor wire resistance influence |
RTD, Potentiometer, 3-wire |
Negligible 2) |
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RTD, Potentiometer, 4-wire |
Negligible |
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mV, T/C |
Negligible |
| Load influence |
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Negligible |
| Power supply influence |
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Negligible |
| RFI influence, 0.15-1000 MHz |
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+0.2% 1) (typical) |
| Long-term stability |
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+0.1% 1)/year |
1) Of input span
2) With equal wire resistance for RTD |
3) If zero-deflection > 100% of input span: add 0.125% of input span/25 C or 0.14% of input span/50 F per 100% zero-deflection
4) Reference temperature 23 C/ 73 F
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THERMOCOUPLE TECHNOLOGY, INC., 350 New Street, Quakertown, PA 18951
Telephone 215-529-9394 Fax 215-529-9397
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MESO-H/MESO-HX Specifications