Vaisala HMP240 User Manual
Page 60
HMP240
User's Guide
M210300en
58
TP2
TP1
TP3
X
7
7
X
8
8
Figure 7.1
Location of solder lugs TP1, TP2 and TP3 and connector
X77
Connect a Pt 100 simulator to connector X77 and set it at the lowest tempera-
ture to be calibrated.
X77
Pt 100
Figure 7.2
Connecting the Pt 100 simulator to connector X77
Switch the power on.
7.4.1
With serial commands
Give command CTA, enter the first point value and press <cr>:
>CTA <cr>
Ta : xx.x Ref1 ? yy.y <cr>
Press any key when ready
Set the Pt 100 simulator at the highest temperature to be calibrated and press
any key. Enter the second point (gain) reference reading.
7.4.2
With display commands
Select Cali in the main menu and then Ta; select two-point calibration Ta 2
point cal. Change the first point reading with the arrow keys and press ENT.
Set the Pt 100 simulator at the highest temperature to be calibrated and adjust
the second point (gain) to the reference reading.
7.4.3
With LED commands
Connect an ammeter/voltmeter to the analogue outputs (connector X2). Give
command ¡l¡¡ and adjust the first point (offset) with the arrow switches to
the same reading with the reference; press ENT switch.
Set the Pt 100 simulator at the highest temperature to be calibrated and adjust
the second point (gain) to the reference reading.