Microsensor MDM7000 Operation Manual page 41

nameplate, the output current signal should be within the range of
4mA to 20mA. If the pressure is below the calibrated measuring
range, the output signal displays 3.8mA. Conversely, if the
pressure is over the calibrated measuring range, the output signal
displays 20.8mA.
9.3 Maintenance and cleaning
9.3.1 Routine maintenance
Zero adjustment

After a certain period of time (determined by the specific operating
conditions), it may be necessary to adjust the zero point of the
transmitter to ensure measurement accuracy. Zero adjustment
can be performed on-site using the transmitter's buttons following
the instructions in section 7.4 of this manual, or it can be done
using a handheld terminal or the supervisory control and data
acquisition (SCADA) system with upper-level software.
Range adjustment

If the operating conditions change, the range may need to be
adjusted. Adjustment can be made with or without a reference
pressure. button adjustment can be done by referring to section
6.3 of this manual ；
supervisory control and data acquisition (SCADA) system with
upper-level software, refer to the relevant manual.
9.3.2 Cleaning
Regularly inspect the instrument output signal based on the on-site
operating conditions. Under normal circumstances, the instrument
may accumulate residues and, therefore, should be periodically
cleaned based
recommended to perform the cleaning indoors following these steps:
while for handheld terminal and the
on the on-site application
39
conditions. It is