Technical Data

Measurement Performance, MMP78 Probe

Water Activity

Measurement range aw

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 (including nonlinearity, hysteresis and

repeatability) 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 HUMICAPâ 180L2

Recommended recalibration interval

1 year

Typical long-term stability

better than 0.01 aw / year

Temperature

Measurement range

-40 ... +100 °C (-40 ... +212 °F)

Typical accuracy at +20 °C

±0.2 °C (±0.36 °F)

Sensor

Pt100 RTD Class F0.1 IEC 60751

Probe Operating Environment

Operating temperature for electronics

-40 ... +60 °C (-40 ... +140 °F)

Operating pressure range

max. 20 bar

Operating pressure range during

installation through ball valve

max. 10 bar

Oil flow range

max. 1 m/s

Typical temperature dependence of

electronics

±0.005 °C/°C (±0.005 °F/°F)

EMC compliance

EN61326-1, Portable Equipment

Probe Mechanical Specifications

Housing classification

IP65 (NEMA 4)

Probe material

Stainless steel (AISI316L)

Housing material

APS/PC Blend

Cable length between probe and

indicator

1.9 m, 10 m extension available

Weight

506 g

MI70 Measurement Indicator

Operating Environment

Operating temperature

-10 ... +40 °C (+14 … +104 °F)

Operating humidity

0 ... 100 % RH, non-condensing

Storage temperature

-40 ... +70 °C (-40 ... +158 °F)

Inputs and Outputs

Max. no of probes

2

Power supply

Rechargeable NiMH battery pack with

AC adapter or 4xAA size alkalines,

type IEC LR6

PC interface

MI70 Link software with USB or serial

port cable

Analog Output

Scale

0...1 VDC

Output resolution

0.6 mV

Accuracy

0.2 % full scale

Temperature dependence

0.002 %/˚C full scale

Minimum load resistor

10 kΩ to ground

Mechanical Specifications

Housing classification

IP54

Housing materials

ABS/PC blend

Weight

400 g

Compatibility

EMC compliance

EN61326-1, Portable Equipment

Other

Menu languages

English, Chinese, Spanish, Russian,

French, Japanese, German, Swedish,

Finnish

Display

• LCD with backlight

• Graphic trend display of any

parameter

• Character height up to 16 mm

Alarm

Audible alarm function

Data logging capacity

2700 real time data points

Logging interval

1 s to 12 h

Logging duration

1 min ... memory full

Resolution

0.01 %RH, 0.01 °C/°F, 0.01 hPa,

0.01 aw, 10 ppm / 0.01 %CO2

Battery Operation Time

Typical charging time

4 hours

Operation Times with MMP76 and MMP78

Continuous use

48 h typical at +20 ˚C (68 °F)

Data logging use

up to a month