Technical Data - MHT410

MHT410 Quick Guide

Document code
M211736EN
Revision
D
Language
English (United States)
Product
MHT410
Document type
User guide
Table 1. Measurement Performance
Property Description/Value
Hydrogen
Measurement range (in oil) 0 ... 5000 ppmv
Accuracy (in oil temperature range -20 ... +60 °C (-4 ... +140 °F)) 1 ±20 % of reading or ±25 ppmv (whichever is greater)
Moisture in Oil
Measurement range (in oil) 0 ... 100 %RS / aw 0 ... 1
Response time (90 % of full response at +20 °C (+68 °F) in still oil) 10 min
Sensor HUMICAP® 180L2
Accuracy (including non-linearity, hysteresis, and repeatability):
0 ... 90 %RS ±2 %RS (aw ± 0.02)
90 ... 100 %RS ±3 %RS (aw ± 0.03)
Temperature
Measurement range -40 ... +120 °C (-40 ... +248 °F) 1
Accuracy at +20 °C (+68 °F) ±0.2 °C (0.36 °F)
Table 2. Operating Environment
Property Description/Value
Oil type Selected when ordering, available options: 2
  • Mineral oil
  • Natural ester oil
  • Synthetic ester oil
Operating temperature (electronics) -40 ... +60 °C (-40 ... +140 °F)
Storage temperature -40 ... +60 °C (-40 ... +140 °F)
Operating humidity 0 ... 100 %RH, condensing

EMC standard EN61326-1, Industrial environment;

CISPR22 class B emission limits when DC powered

Fulfills the requirements of IEC 61000-6-5 in the following tests: IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11, IEC 61000-4-12, IEC 61000-4-16, IEC 61000-4-17.
Table 3. Inputs And Outputs
Property Description/Value
Operating voltage 15 ... 30 VDC, 24 VAC (±15 %) (power supply input is galvanically isolated) 3
Power consumption Typical 4 W, maximum 12 W
Recommended external power supply 24 VDC / 0.5 A minimum
Analog Output (Current) 3
Channels Three isolated 4 ... 20 mA (loop powering required)
External load Max. 500 Ω
Digital Outputs 3
Interfaces

Isolated RS-485 half-duplex

RS-485 (Service Port)

Protocols

Modbus RTU, DNP3, serial ASCII commands

1 Note that the temperature range for specified measurement accuracy differs between measurement parameters. Measuring a parameter outside its temperature range does not damage the sensor, but results in reduced accuracy for that parameter.
2 Changing the oil type MHT410 measures requires reconfiguration at Vaisala.
3 Max. isolation voltage 1.5 kV DC.