Meriam M1 – Series Pressure Calibrator - Manual (Page 5)

M1 Series – PC Instruction Manual 9R000035-IR
E.O. 6409 JAN 2008
www.meriam.com
Page 5 of 18
Zeroing the M1
To Zero the M1, first turn off pressure sources and vent pressure ports to
atmosphere. Then simultaneously press and hold the F and U keys until
“F.CAL” is displayed. The process is complete when the display changes
from “----” to a “zero” reading.
Note: The M1 can only be zeroed if the applied pressure is within ±1% of
the full scale range. Further details are provided under Field
Recalibration.
Set Functional Mode
There are 5 possible modes: NORMAL, HOLD, MIN/MAX, AVE and TEMP
(°F or °C). NORMAL (pressure measure mode) is the default on power up,
and is active when the latter four modes are not displayed on the LCD.
Functional Modes
HOLD Freezes the pressure measurement on the
display, however, the bar graph is still active
MIN/MAX Displays the MIN and MAX pressures
AVE Displays a filtered average of the pressure
measurements
TEMP Displays the internal ambient temperature of the
M1
The NORMAL mode has an additional sub mode referred to as “REC” or
record mode, which is described later.