The MM70 is an ideal tool for the preventive maintenance of oil-filled systems.
The water activity measurement indicates the margin to free water formation, which causes severe problems in lubrifications systems. The HUMICAP handheld moisture meter for oil MM70 enables reliable detection of moisture in oil.
FEATURES & BENEFITS
Measurement independent of oil type, age and temperature
In-line process checking through ball valve, no need to drain the oil
Rugged and reliable construction
Excellent pressure and temperature tolerance
Data can be logged and transferred to a PC
Vaisala HUMICAP Sensor - proven field performance since 1973
Compatible with Vaisala's fixed oil moisture instruments
Temporary outdoor logging possible with carrying case
No reference oil needed for recalibration
IN-LINE PROCESS CHECKING THROUGH BALL VALVE
The probe can be inserted directly into the process pipe through a ball valve without draining the oil in the system.
WATER ACTIVITY MEASUREMENT
The MM70 measures moisture in oil in terms of the water activity (aw) and temperature (T). Water activity directly indicates whether there is a risk of free water formation. The measurement is independent of oil type, age and temperature.
NUMERICAL AND GRAPHICAL DISPLAY
The MM70 features a multilingual, menu-based user interface and a backlit LCD display. The measurement parameters can be numerically and graphically displayed and logged into the meter's memory at the same time. An analog output option is also available.
CONNECTION TO PC
The optional MI70 Link Windows software is used to transfer logged data and real time measurement data from the MM70 to a PC.
PROVEN VAISALA HUMICAP TECHNOLOGY
The MM70 incorporates the latest generation of the Vaisala HUMICAP Sensor, developed for demanding moisture measurements in liquid hydrocarbons. The sensor's excellent chemical tolerance provides accurate and reliable measurement over the measurement range.
SPEEDY SERVICE - ONCE A YEAR
The meter can be recalibrated by sending the probe to Vaisala Service, or customers can calibrate the instrument themselves using a standard relative humidity calibration.
MULTI-PROBE OPERATION
One or two probes can be connected simultaneously. Maintenance teams can use additional Vaisala dewpoint or relative humidity probes for other tasks. For example, a dewpoint probe is ideal for checking the moisture inside washed and dried oil tanks.
| PERFORMANCE | |
| Water activity | |
| Measurement range | 0 to 1 aw |
| Accuracy (including nonlinearity, hysteresis and repeatability) when calibrated agaisnt salt solutions (ASTM E104-85) | ±0.02 (0 to 0.9) ±0.03 (0.9 to 1.0) |
| Accuracy (including nonlinearity, hysteresis and repeatability) maximem achievable accuracy when calibrated against high quality, certified humidity standards | ±0.01 (0 to 0.9) ±0.02 (0.9 to 1.0) |
| Response time (90%) | 10 min. (at 20°C) in still oil with stainless steel filter |
| Sensor | >Vaisala HUMICAP |
| Recommended recalibration interval | 1 year |
| Measurement range | -40 to 100°C (-40 to 212°F) |
| Typical accuracy at 20°C | ±0.2°C (±0.36°F) |
| Typical temp. dependence of electronics | ±0.005°C/°C (±0.005°F/°F) |
| Sensor | Pt 100 IEC 751 1/3 class B |
| Typical long-term stability | better than 0.001 aw/year |
| OPERATING EQUIPMENT | |
| Probe | |
| Operating temp. for electronics | -40 to 60°C (-40 to 140°F) |
| Operating pressure range | Max. 20 bar Max. 10 bar (during installation through ball valve) |
| Oil flow range | Max. 1 m/s |
| Indicator | |
| Operating temperature range | -10 to 40°C (14 to 104°F) |
| Operating humidity range | non-condensing |
| Electromagnetic compatibility | |
| Complies with | EMC standard EN61326-1:1997 + Am1:1998, Electrical equipment fr measurement, control and laboratory use - EMC requirements: Portable test and measurement. |
| INPUTS AND OUTPUTS | |
| Power supply | Rechargeable NiMH battery pack with AC-POWER or 4 x AA-size alkalines, type IEC LR6 |
| Battery operation time continuous use | 48 hours typical at 20°C (68°F) |
| Battery operation time datalogging use | Up to 31 days |
| Menu languages | English, French, Spanish, German, Sweidish, Finninsh |
| Display | LCD with backlight, graphic trend display of any parameter character hight up to 16mm |
| Analog output | 0 to 1 VDC |
| Output resolution | 0.6 mV |
| Data interface | RS232 |
| Datalogging capacity | 2700 points |
| Alarm | Audible alarm function |
| MECHANICS | |
| Probe | |
| Housing classification | IP65 (NEMA 4) |
| Housing material | ABS/PC blend) |
| Probe material | Stainless steel (AISI316L) |
| Cable length between probe and indicator | 1.9m (10m extension available) |
| Weight | 506g |
| INDICATOR | |
| Housing classification | IP54 |
| Weight | 400g |
| Probe inputs | 1 or 2 |
| CAT. NO. | DESCRIPTION |
| VAMM70-000 | Handheld moisture and temperature meter for spot-checking in oil |
| Probes | |
| VAHM75-000 | Relative humidity measurement probe model HM75 |
| VAHM76-000 | Relative humidity measurement probe model HM76 |
| VAHM77-000 | Relative humidity measurement probe model HM77 |
| VADMP74A/B | Dewpoint measurement probes |
| Options and accessories | |
| VAMI70CASE2 | Carrying case |
| VAHMP228BVS | Ball valve set (incl. fitting body and blanking plug) |
| VA213017SP | Probe cable extension, 10m |
| VA27159ZZ | Transmitter connection cable for HMP228 |
| VADRW216050 | Transmitter connection cable for MMT318 |
| VA27168ZZ- | Analog output cable |
| VAMI70LINK | Windows software, inclides PC connection cable |
| VAHM47453SP | Sensor protection |
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