PST MICHELL Instruments MDM300, User Manual, Page: 24 / 70

MDM300 User Manual
16 97122 Issue 16.2 June 2022
INSTALLATION
2.6.4 Entering User Pressure
The MDM300 can be programmed with a pressure to be used in the calculation of
atmospheric equivalent or pressure dew point, moisture content or absolute humidity.
NOTE: Care should be taken to ensure that the entered pressure is correct as
it may have a considerable effect on the measurement.
Using the
EXTERNAL
option in the SET-UP Menu, set a user pressure as follows.
1. Scroll to USER PRESSURE .
2. Use the

and

keys to select either
ATM
(for atmospheric pressure) or
the required pressure.
NOTE: The pressure units are selected in the Settings Menu.
2.6.5 Connecting your own Temperature or Pressure Transmitter
To connect your own 4...20mA temperature transmitter or pressure transmitter, the
connector P/N MDM-27767 is required.
Wiring is shown below in figure 13.
If connecting an external temperature transmitter, refer to 2.6.1 for setup instructions.
For an external pressure transmitter, refer to 2.6.2 for setup instructions.
OUTER
SHEATH
RED +POWER
GREEN
RED
GREEN
SIGNAL
(SOURCE)
VIEW ON REAR
OF CONNECTOR
GREEN
2
RED
1
GREEN - 4-20Ma (SOURCE)
RED - +POWER
SOLDER BUCKET VIEW
Figure 13 P/N MDM-27767