Vaisala PTB220 User Manual download pdf (Page 68)

USER'S GUIDE_______________________________________________________________________

62 ___________________________________________________________________ M210194EN-A

NOTE

Always remember to return the switch SW4 to write DISABLE

position (OFF).

Multipoint adjustment

MPCI Entering multipoint corrections

MPCI n <cr>

where:

n = number of the pressure transducer (1, 2 or 3)

The MPCI command is used to enter new multipoint corrections to the

barometer. Note that the user must give the multipoint corrections to

each pressure transducer separately.

Entering new multipoint corrections is protected by switch SW4. The

switch SW4 is normally in write DISABLE position (OFF) and the

user must change it to write ENABLE position (ON) to be able to

enter new linear and multipoint corrections to the barometer.

The previous corrections must first be deactivated using the LC OFF

and/or MPC OFF commands. Precalibration of the barometer then

gives the required corrections. The new multipoint corrections will

always cancel the previous corrections as well as the valid date of

calibration of the barometer (see CALD command). When entering

new multipoint corrections, always start at the low end and then go up

the pressure range. Use ESC to abort without executing the command.

When the new multipoint corrections have been entered, they must be

activated with the MPC ON command.

In the following, an example of performing a multipoint adjustment

for pressure transducer P1 is given.

>lc off <cr>

Linear adj. : OFF

>mpc off <cr>

Multipoint adj: OFF

>mpci 1 <cr>

P1 1. reading ? 499.72 <cr>

correction ? -0.07 <cr>

P1 2. reading ? 599.20 <cr>

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 112 113

No comments

Vaisala PTB220 User Manual Page 68