CLIMET INSTRUMENTS CI-90A, Operator'S Manual

CI-90A User’s Manual 

Page 26 

3.2

RS-232 Commands 

Each of the RS-232 commands is only a single letter in length. They are listed below, along 

with their functional descriptions.   

Command   

            Function 

Y 

Send model and software revision numbers, flow 90% and 100% 
A/D values, and flow digital pot setting 

K 

Receive Site ID strings into the CI-90 

k 

Receive User ID strings into the CI-90 

o 

Send the total time that the blower has been run 

 
When the Y command is received the CI-90A responds by sending back the following: 

CI-90A 

model number

Software Revision 2.07 

software revision number

209

flow 90% A/D value; 209 is typical 

221

flow 100% A/D value; 221 is typical 

010 

flow digital pot setting; 010 is typical 

The “CI-90” is used by ID Pro to identify which model of CLiMET instrument it is 
communicating with. All other information is provided for technicians and maintenance 
personnel during calibration and repair. 

 When the K command is received the CI-90A responds by first starting a 28 second timer, 

then storing the next 1500 characters it receives into non-volatile memory and setting the current 
site ID to the blank (000). If the timer ends before 1500 characters are received, it determines the 
last full 15 character ID that entered and sets it as the current site ID. This serves as an indication 
to the user that something has malfunctioned, since ID Pro always sends 1500 characters 
regardless of how many ID’s are sent, and it routinely does it in about half the timer duration. 

When the k command is received the CI-90A responds by first starting a 4 second timer, then 

storing the next 90 characters it receives into non-volatile memory and setting the current user ID 
to the blank (00). If the timer ends before 90 characters are received, it determines the last full 9 
character ID that entered and sets it as the current user ID. As with the K command, if the current 
user is not set to blank (00), something has gone wrong with the download.  

When the o command is received the CI-90A responds by sending back the following: 

hhhhh hours, mm minutes of blower run time.  

h and m are numerals 0-9 

This command is normally used by a technician to determine the amount of run time on the 
blower. 

3.3

CI-9x Loader 

CI-9x Loader

 (P/N 95035101) is a separate program that allows the user to load all 100 site 

ID’s and all 10 user ID’s from a PC without having to use the CI-90’s alpha entry menu.  
Although the CI-90’s alpha entry screen is a convenient, stand-alone way to enter ID names, it is