Vaisala HMP230 - Manual (Page 30)

HMP230 SERIES
User's Guide
M210225en-B
24
4. COMMISSIONING
When HMP230 transmitters leave the factory, their measurement ranges and
output signals have already been scaled according to the order form completed
by the customer. Units are calibrated at the factory and ready to operate when
the power is turned on. If you take into use active current, voltage or serial bus
outputs, make these connections first; Appendix 9 describes them in detail.
NOTE
Make sure that the power is not turned on until cables
have been connected to screw terminals!
In transmitters with display, the software version appears for a few seconds
when the power is turned on. After this, measurement results appear
automatically. Should an error message appear on the display, consult
Appendix 5.
If your transmitter has a blank cover and the LED indicator inside the housing
lights up, consult Appendix 5 for further information.
Appendix 7 contains information on how to determine the ranges for alarm
outputs and alarm controls when an alarm output unit is used.
4.1. Changing the parameters
If necessary, the user can subsequently change the measurement units between
metric and non-metric and select and scale the output signals with software
functions. This is done through commands, either utilizing the menus on the
local display or giving commands through the serial interface (see
Appendices). Most often the commands are used to change the settings of the
two analogue channels.
4.2. Security lock jumper
Before the settings can be changed, the user must first remove the security
lock jumper in connector X15 (see Figure 22). The security lock jumper makes
it impossible to change the transmitter settings by mistake.