All MASS-VIEW models which have O2 as a pre-installed gas are degreased.

The MASS-VIEW flow meters can measure humid air. 

Humid air can be seen as a mixture of water and air. The physical properties of the mixture will differ from those of dry air. Therefore, the inaccuracy of a thermal mass flow meter calibrated for dry air could increase when humid air is applied instead of dry air.

What we have seen is that as long as there is no condensation the inaccuracy caused by humidity is less than 0.1% FS for models MV-104, MV-106, MV-304 and MV-306 and 0.3%FS for models MV-102 and MV-302.

MASS-VIEW® has two communication options:
- FLOWBUS over RS-232
- MODBus RTU over RS-485

there is no FLOWBUS over RS-485 communication possible.
FLOWBUS over RS-232 is mostly used to communicate directly to a PC (running FLOWDDE + FLOWPLOT). RS-232 is a point-to-point connection.

MODBus RTU is mostly used when a fieldbus is used to connect several instruments to one bus.

The MASS-VIEW® flow meter has two alarms connected to a relay/switch. This relay is already included in the MASS-VIEW®. One side of the switch is connected to ground (0 Vdc) and the other side is connected to Pin 3 (alarm high). The other relay is also with one side connected to ground (0 Vdc) and the other side is connected to Pin 5 (alarm low). Please read the manual for more information about the alarm settings you can program.

Switching current 0.5 A, 24 Vdc

 We have made a maximum capacity list for all MASS-VIEW® models in different flow units

 To determine the pressure drop over a MASS-VIEW instrument, you should visit our pressure drop section where we have published all information per gas per MASS-VIEW instrument at different flows and different inlet pressures.

Just plug-in the power supply and select your options on the display. This video shows what will happen.

The following counter units are available for MASS-VIEW(r):

- when mass flow units are selected in the measure->type menu: μg; mg; g and kg

- when volume flow units are selected in the measure->type menu: l_n; mm³_n; ml_n; cm³_n; μl_n; dm³_n; m³_n; μl_s; mm³_s; ml_s; cm³_s; l_s; dm³_s; m³_s

The following flow units can be selected on a MASS-VIEW(r):

- mass flow units: μg/h; μg/min;  μg/sec; mg/h; mg/min; mg/s; g/h; g/min; g/s; kg/h; kg/min; kg/s

- volume flow units (at normal conditions): μl_n/h; μl_n/min; μl_n/s; ml_n/h; ml_n/min; ml_n/s; l_n/h; l_n/min; l_n/s; cc_n/h; cc_n/min; cc_n/s; mm³_n/h; mm³_n/min; mm³_n/s; cm³_n/h; cm³_n/min; cm³_n/s; m³_n/h; m³_n/min; m³_n/s; scfh; scfm; scfs; sccm; slm

- volume flow units (at standard conditions):  μl_s/h; μl_s/min; μl_s/s; ml_s/h; ml_s/min; ml_s/s; l_s/h; l_s/min; l_s/s; cc_s/h; cc_s/min; cc_s/s; mm³_s/h; mm³_s/min; mm³_s/s; cm³_s/h; cm³_s/min; cm³_s/s; m³_s/h; m³_s/min; m³_s/s

We have a (backdoor) solution for this, you can always use abc as password and then change the password again.

every few seconds, the MASS-VIEW® writes the countervalue to a non-volatile memory to be sure no data is lost after a powerfailure

The counter function will start counting a measured value when the instrument measures a value of 2% or higher of its capacity. Below 2% nothing is counted.