Vaisala HUMICAP MMT310 Instrukcja Obsługi Pobierz pdf (Strona 56)

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MM70 Hand-Held Moisture and Temperature

Meter for Spot-Checking in Oil

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.

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.

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 in combination with a

USB connection cable 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.

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

▪

No reference oil needed for

recalibration

▪

NIST traceable (certiﬁcate

included)

Technical data

Performance

WATER ACTIVITY

Measurement range a

0 ... 1

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 -40 ... +100 °C (-40 ... +212 °F)

Typical accuracy at +20 °C ±0.2 °C (±0.36 °F)

Typical temperature 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 0.01 aw / year

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

MI70 Link software with USB cable 219687

MI70 Link software with serial port cable MI70LINK

Analog output cable 27168ZZ

Sensor protection HM47453SP

Dewpoint measurement probes DMP74A/B

Relative humidity measurement probes HMP75, HMP76, HMP77

Dimensions

Dimensions in mm (inches)

Inputs and outputs

Power supply Rechargeable NiMH battery pack with

AC-adapter or 4xAA-size alkalines, type IEC LR6

Battery operation time

continuous use 48 h typical at +20 °C (+68 °F)

data logging use up to a month, depending on

logging interval

Menu languages English, Chinese, Spanish, French, German,

Japanese, Russian, Swedish, Finnish

Operating environment

PROBE

Operating temperature range for electronics -40 ... +60 °C

(-40 ... +140 °F)

Operating pressure range max. 20 bar

during installation through ball valve max. 10 bar

Oil ﬂow range max. 1 m/s

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.

This material is subject to copyright protection, with all

copyrights retained by Vaisala and its individual partners. All

rights reserved. Any logos and/or product names are trademarks

of Vaisala or its individual partners. The reproduction, transfer,

distribution or storage of information contained in this brochure

in any form without the prior written consent of Vaisala is strictly

prohibited. All speciﬁcations — technical included — are subject

to change without notice.

For more information, visit

www.vaisala.com or contact

us at sales@vaisala.com

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

INDICATOR

Housing classiﬁcation IP54

Weight 400 g

Probe inputs 1 or 2

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

PC interface MI70 Link software with USB or serial port cable

Data logging capacity 2700 points

Alarm Audible alarm function

HUMICAP

is a registered trademark of Vaisala.

" ISO 7/1

Adjustment range 250 mm

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 122 123

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