SENSORES AGUA EN ACEITE MM70
P.O. Box 26, FI-00421 Helsinki, FINLAND
Tel: +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com/MM70
MM70 Hand-Held Moisture and Temperature
Meter for Spot-Checking 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
• NIST traceable (certificate included)
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 lubrication systems.
The Vaisala HUMICAP® Hand-held
Moisture Meter for Oil MM70 enables
reliable detection of moisture in oil.
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.
ppm calculation included
The MM70 has an embedded model for
expressing moisture as ppm in mineral
transformer oil. The customer can
enter up to three other oil models into
the meter’s memory.
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Numerical and graphical
display
Speedy service - once a
year
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.
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.
Connection to PC
The optional MI70 Link Windows®
software in combination with a USB
connection cable is used to transfer
logged data and real time measurement
data from the MM70 to a PC.
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.
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.
Display featuring selectable parameters in
numerical and graphical format.
Vaisala Instruments Catalog 2008
Ref. B210712en rev. A
MM70
MOISTURE IN OIL
Technical Data
Performance
Water activity
0 ... 1
Measurement range aw
Accuracy (including nonlinearity, hysteresis and repeatability)
When calibrated against salt solutions (ASTM E104-85):
0 ... 0.9
±0.02
0.9 ... 1.0
±0.03
Maximum achievable accuracy when calibrated against
high-quality, certified humidity standards:
0 ... 0.9
±0.01
0.9 ... 1.0
±0.02
Response time (90%) at +20 °C (+68 °F)
in still oil (with stainless steel filter)
10 min.
Sensor
Vaisala HUMICAP®
Recommended recalibration interval
1 year
Temperature
Measurement range
Typical accuracy at +20 °C
Typical temperature dependence
of electronics
Sensor
Typical long-term stability
-40 ... +100 °C (-40 ... +212 °F)
±0.2 °C (±0.36 °F)
±0.005 °C/°C (±0.005 °F/°F)
Pt 100 IEC 751 1/3 class B
better than 0.01 aw / year
Indicator
Housing classification
Weight
Probe inputs
IP54
400 g
1 or 2
Options and accessories
Carrying case
MI70CASE2
Ball valve set (incl. fitting body & blanking plug)
HMP228BVS
Probe cable extension, 10 m
213107SP
Transmitter connection cables for
HMP228
27159ZZ
MMT318
DRW216050
MMT/HMT330/DMT340
211339
USB cable for Mi70 (incl. Mi70 Link software)
219687
Analog output cable
27168ZZ
Windows® software, includes PC connection cable
MI70LINK
Sensor protection
HM47453SP
Dewpoint measurement probes
DMP74A/B
Relative humidity measurement probes
HMP75, HMP76, HMP77
Dimensions
Dimensions in mm (inches)
Operating environment
Probe
Operating temperature range for electronics
-40 ... +60 °C
(-40 ... +140 °F)
max. 20 bar
max. 10 bar
max. 1 m/s
Operating pressure range
during installation through ball valve
Oil flow range
Indicator
Operating temperature range
-10 ... +40 °C (+14 ... +104 °F)
Operating humidity range
non-condensing
Electromagnetic compatibility
Complies with EMC standard EN61326-1, Electrical equipment for
measurement, control and laboratory use - EMC requirements;
Portable equipment.
Inputs and outputs
Power supply
Rechargeable NiMH battery pack with AC-POWER
or 4xAA-size alkalines, type IEC LR6
Battery operation time
continuous use
48 h typical at +20 °C (+68 F)
datalogging use
up to 31 days
Menu languages
English, Chinese, Spanish, French, German,
Japanese, Russian, Swedish, Finnish
Display
LCD with backlight, graphic trend display of
any parameter, character height up to 16 mm
Analog output
0 ... 1 VDC
Output resolution
0.6 mV
RS-232 (accessible only with MI70 Link software)
Data interface
Data logging capacity
2700 points
Alarmaudible 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
1.9 m,
10 m extension available
Weight
506 g
Vaisala Instruments Catalog 2008
Ref. B210712en rev. A
3*40
HUMICAP® is a registered trademark of Vaisala.
Specifications subject to change without prior notice.
©Vaisala Oyj
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