Teledyne 2002 Manuale Utente

 

Page 26 of 38 

 

The setpoints may also be entered as a decimal number,  e.g. [H=760.99<CR>]  will be same as entering  
[H=7.6099E+2<CR>] .  

When inputting setpoint data, it should be entered in the same Units of Pressure as the presently selected 
Units of Measurement (i.e. Torr, mbar or Pascal). The data is only checked to be a valid number with a one 

digit exponent before being accepted. There are no limit checks on the data; the user is free to choose any 
value appropriate to his use of the instrument. 

 The Turnaround Delay and RS-485 address are unique to multipoint communications. In order to prevent 

inadvertent modifications of these parameters, the multipoint attention character and the Model 2002’s 
present address [*{aa}] MUST be used and are checked for validity before the command is executed. 

If the RS-485 address is unknown, the ‘UNIVERSAL ADDRESS’ [*00] may be used to set the address to a 

known value,  e.g. [*00A=35<CR>] will change the RS-485 address to 35. 

Caution: 

Since all units will respond to the ‘UNIVERSAL ADDRESS’, make sure that only the unit 

to be modified is connected to the RS-485 Bus. If more than one unit is connected, this will result in all of the 

units being set to the same address.  

The value entered for the Turnaround Delay is used to modify an internal timer which normally runs at ~8 
millisecond,  e.g. [*{aa}T=10<CR>] will set the delay to ~80 milliseconds. 

If the command syntax is not met or if the number is out or range, the HPM-2002 will respond with the 
ASCII codes for <bell>?<CR>, and the command will be ignored. 

Command 

Description 

  Format 

    Valid 

Range: 

Set Full Scale Calibration 

 CF={m.d}E{e}<CR>...................................... 5.12e+2  to  1.023e+3 Torr 

 ............................................................................6.83e+2 

to 

1.365e+3 mbar 

 .......................................................................... 6.83e+4 

to 

1.365e+5 Pascal 

Set Midpoint Calibration 

CM={m.d}E{e}<CR> ..................................... 4.00e+0  to  7.999e+0 Torr 

 ............................................................................5.34e+0 

to 

1.066e+1 mbar 

 .......................................................................... 5.34e+2 

to 

1.066e+3 Pascal 

Set Low point Calibration 

CL={m.d}E{e}<CR>.....................................................0 to 1.249e-1  Torr 

 ........................................................................................ 0 

to 

1.666e-1 mbar 

 ..................................................................................... 0 

to 

1.666e+1 

Pascal 

The calibration adjustment data may also be entered as a decimal number,  e.g. [CF=760.99<CR>]  will be 

same as entering  [CF=7.6099E+2<CR>] .  

When inputting calibration adjustment data, it must be within the valid range of the presently selected Unit 

of Measurement (i.e. Torr, mbar or Pascal). The data is checked to be valid before being accepted. 

If the command syntax is not met, or if the number is out or range, the HPM-2002 will respond with the 
ASCII codes for <bell>?<CR>, and the command will be ignored.