Martel Electronics T140 Series - Manual (Page 7)

5
5. Operating Procedure
1. Connect the desired 1/8NPT fitting to the
pressure manifold. Note that for gage
(positive pressure) measurements use the
HIGH input port. If differential measurements
are being made, both ports must be used
with the higher of the two pressures going
into the HIGH input port. The 300 and 3000
PSI versions have a single port since they
operate as a gauge only device.
2. Turn on power and select the desired
Engineering units you wish to use. Pressing
the ENG. UNITS key will allow you to toggle
through the available selections.
3. With the calibrator open to ambient pressure
press the ZERO key to zero the reading.
4. Apply the pressure to be measured. If the
reading is unstable due to pressure
fluctuations, press the DAMP key to dampen
the reading. To disable the damping function,
press DAMP again.
5. The T140 can be used to monitor a pressure
then recall the maximum and minimum
values. When pressure is introduced into the
port, the pressure value is automatically
stored as maximum or minimum values. As
the pressure changes, the minimum and
maximum values are constantly updated.
These stored values can be cleared at any
time by pressing the CLEAR key. The
memory is also cleared when the calibrator is
turned off.
To recall a stored value, press and hold either
the MAX or MIN key, depending on the
reading you wish to review. When the key is
released the calibrator returns to the present
reading value.