Teledyne 2002 instruction manual Parameter Modification Commands, Calibration Adjustment Commands

Transmit Selected Units	U<CR>		Torr<CR>
Transmit Software Version#	V<CR>	Hastings Instruments - Model 2002
		Version 1.60 - (07-02-2002)<CR>
Parameter Modification Commands
Command Description	Format		Valid Range:
Modify High Setpoint	H={m.dd}E{+e}<CR>	1.00000e-9 to 9.99999e+9
Modify Low Setpoint	L={m.dd}E{-e}<CR>	1.00000e-9 to 9.99999e+9
Modify Selected Gas #	G={d}<CR>		0 To 4	(Decimal)
Modify Selected Units	U={u}<CR>		T, or M, {or P, if Available}
Modify Decimation Ratio	D={dddd}<CR>		63 To 7936	(Decimal)
Modify RS-485 Address	*{aa}A={aa}<CR>		1 To FF	(Hexadecimal)
Modify Turnaround Delay	*{aa}T={dd}<CR>		0 To 255	(Decimal)

Notes:

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.

Calibration Adjustment Commands

Command Description Format Valid Range:

page 32 Model 2002