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PressureMAT User Guide
Revision 1
Page 12/29
Navigation Between Pressure Sensor Input Channels
At the HOME screen, the UP/DOWN arrows are used to change the selected pressure input
channel.
Zero Calibration for Pressure Sensors
1. Select the desired input using the UP/DOWN buttons
2. With a pressure sensor connected to the system and EXPOSED ONLY TO
ATMOSPHERIC PRESSURE , press the LEFT ARROW button on the keypad
3. The display should read 0.0 psi / 0.00 bar
4. If 0.0 psi / 0.00 bar is not on the display, press the ZERO TARE button on the keypad
again
Note: a minus sign may appear on the display when it reads 0.0 psi / 0.00 bar; this is
normal as the pressure measured by the system may be a value such as -0.001 but
displayed as -0.0 psi / -0.00 bar.
Alarm Function
If any channel has an alarm, the alarm function includes:
a. A dry contact relay associated with that channel will switch (i.e., if wired as normally
CLOSED, it will OPEN)
b. The display screen will blink “ALARM>” on the channel with the alarm
c. An audible tone for 30 seconds during the present alarm (it is reset for a new alarm
condition)
When an alarm condition goes away, all indicators automatically go back to normal (unless the
optional alarm latching function is turned on). If a sensor is inadvertently not connected or
becomes accidentally disconnected during a process and stops monitoring pressure, there will
be a high pressure alarm notification that pressure is not being monitored.
Program Menu
To access the program menu for a pressure sensor, press the PROG key on the keypad with the
desired input channel selected. The program menu is mainly used for setting of the high and
low alarm set points and alarm detect delay. After pressing the PROG key, the following
screen appears with X indicating selected channel:
Channel X
> Input Viewing
Output Viewing
Input Programming
Output Programming