Owner's manual

HMP228

M210282en-A Operating Manual

• If you want to see how the sensor stabilizes to the reference

temperature, enter c <cr> instead of the first reference:

T : 0.90 Ref1 ? c <cr>

T : 0.55 Ref1 ? c <cr>

T : 0.55 Ref1 ? 0.0 <cr>

Press any key when ready...

• Change the temperature and again check the transmitter against the

reference.

• Check that the reading corresponds with the reading of the reference

instrument. If not, adjust the second point.

• Press any key, enter the second point value and press <cr>.

T : 20.0 Ref2 ? yy.y <cr>

• The stabilization of the sensor can be monitored well by entering c

<cr> instead of the reference value.

4.6.2.2 Using display/keypad commands

• 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 again check the transmitter against the

reference.

• Check that the reading corresponds with 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.

4.6.2.3 Using LED commands

• 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 again check the transmitter against the

reference.