Vaisala HMP260 - Manual (Page 53)

HMP260 SERIES
HMP260-U017en-1.5 Operating Manual
1997-11-25 47
•
The stabilization of the sensor can be monitored by entering c
instead of the reference value.
6.2.2.2 Using display/keypad commands
Disconnect the security lock jumper!
• Leave the reference instrument and the transmitter for at least 4 hours
in the same space so that their temperatures have time to equalize.
Remove the filter cap prior to calibration.
• Check the transmitter against the reference.
• Select Cali in the main menu and then T cal; select two-point
calibration T 2 point cal. Change the first point reading with the
arrow keys and press ENT.
• Change the temperature and check the transmitter again against the
reference.
•
Check that the reading corresponds to the reading of the reference
instrument. If not, adjust the second point
•
If necessary, change the second point reading with the arrow keys and
press ENT.
6.2.2.3 Using LED commands
Disconnect the security lock jumper!
• Leave the reference instrument and the transmitter for at least 4 hours
in the same space so that their temperatures have time to equalize.
Remove the filter cap prior to calibration.
• Check the transmitter against the reference.
• Connect an ammeter/voltmeter to the analogue outputs (connector
X2). Give command
¡¡l¡. At the first calibration point the LED
on the left flashes; adjust the first point (offset) with the arrow
switches to the same reading with the reference and press ENT
switch.
• Change the temperature and check the transmitter again against the
reference.
•
Check that the reading corresponds to the reading of the reference
instrument. If not, adjust the second point.
•
If necessary, adjust with the arrow switches to the correct value and
press ENT. At the second calibration point the second LED from the
left flashes.