Pressure Calibration; Calibrate Pressure Zero - Thermo Scientific 42i Instruction Manual

Pressure Calibration

Calibrate Pressure Zero

Thermo Fisher Scientific
The Pressure Calibration submenu is used to calibrate the pressure sensor
to zero, span, or restore factory default values. The pressure calibration is
visible only when the instrument is in service mode. For more information
on the service mode, see
The pressure sensor's zero counts and span slope are displayed on the
menu.
Note This adjustment should only be performed by an instrument service
technician. ▲
In the Main Menu, choose Service > Pressure Calibration.
●
PRESSURE SENSOR CAL:
>ZERO
SPAN
SET DEFAULTS
RANGE AVG
The Calibrate Pressure Zero screen calibrates the pressure sensor at zero
pressure.
Note A vacuum pump must be connected to the pressure sensor before
performing the zero calibration.
Note Wait at least 30 seconds for the reading to stabilize before saving the
value.
▲
In the Main Menu, choose Service > Pressure Calibration > Zero.
●
CALIBRATE PRESSURE ZERO:
CURRENTLY:
SET TO:
CONNECT VACUUM PUMP AND
 SAVE ZERO PRESSURE
RANGE AVG
"Service Mode" earlier in this chapter.
72
1.1416
DIAGS ALARM
▲
232.5 mmHg
0.0 mmHg
DIAGS ALARM
Operation
Service Menu
Model 42i Instruction Manual 3-77