Meriam M2 – Series Smart Manometer - Manual (Page 12)

6
To Zero AI (Absolute) Type Manometers
Start with the unit turned OFF and use the following
keystroke sequence:
Keystroke Display
1. Press ON/OF button. The display briefly shows header
name and full scale range in the
last engineering unit selected.
Then goes into the Measure Mode
to display pressure
2. Connect the M200 to a
vacuum source capable of
a vacuum of 100 microns
absolute pressure or less.
3. Pull a full vacuum. Display should read close to zero.
(See note on next page)
4. Press Min/Max and
Hold keys at the same
time. (See figure 1
above.)
Top line of display reads
“ZEROING SOURCE:” Bottom line
of display reads “REF TO ABS
ZERO”
5. Press the PRGM key.
Top line of display reads “ZERO IN
PROGRESS” while bottom line
counts down from 9. Zeroing is
complete when unit returns to
Measure Mode.
3. Program Mode
The program mode is used to configure the manometer for
Measure Mode operation. After the PRGM key is pressed
in Measure Mode, the top line of the display reads
“PROGRAM MODE”. The bottom line reads “UNITS
SELECT”. Press the  or  arrow keys to scroll through
the Program Mode to the desired register. The
configurable registers that are found in Program Mode
are Units Select, Damp Rate Select, User Info Select,
Contrast Select, Data Logging, Leak Test and Exit.
Two sub-
modes under “Units Select” are provided: User
Unit Select and Flow Unit Select. Press the PRGM key
to select either of these sub-modes and set up their
respective function. The manometer can be put into
Program Mode at any time during Measure Mode
operation by pressing the PRGM key. If Lockout is set, the
correct code must be entered when prompted.