APPENDIX A Firmware Commands

Teledyne API Ultrafine Particle Monitor - Model 651

RIE – Read Instrument Errors

RIE reads the instrument errors (displayed as a 16-bit integer in hexadecimal format). The number may be a combination of the values of more than one flag.

RIE

Command

RIE

 

 

Response

Bit 0 x XXXX

Bit = Hexadecimal character A-F. When the bit

 

 

is set, the parameter is in error.

 

 

XXXX = 4-digit number

 

 

0x0001

= Conditioner Temperature

 

 

0x0002

= Growth Tube Temperature

 

 

0x0004

= Optics Temperature

 

 

0x0008

= Vacuum Level

 

 

0x0020

= Laser Status

 

 

0x0040

= Water Level

 

 

0x0080

= Concentration Over-range

 

 

0x0100

= Pulse Height Fault

 

 

0x0200

= Absolute Pressure

 

 

0x0400

= Nozzle Pressure

 

 

0x0800

= Water Separator Temperature

 

 

0x1000

= Warmup

 

 

0x2000

= Reserved

 

 

0x4000

= Service Reminder

 

 

0x8000

= Reserved

Example

 

 

 

Command

RIE

Read Instrument Errors

Response

C00

Water Separator Temperature and Nozzle

 

 

Pressure faults (Nozzle Pressure =

 

 

hexadecimal 4. Water Separator =

 

 

hexadecimal 8. Added together they make

 

 

hexadecimal C.)

Note: Hexadecimal is a numerical system using a base of 16. The symbols 0-9 represent the values zero to nine, and the letters A-F represent the values ten to sixteen. It is a useful “shorthand” for computer engineering because each hexadecimal digit represents four binary digits.

RIF – Read Aerosol Flow Rate

RIF reads the inlet flow rate in liters per minute (L/min).

RIF

Command

RIF

 

Response

X

X = Floating point number either 0.12, 0.6, or

 

 

3.0

Example

 

 

Command

RIF

Read Inlet Flow Rate

Response

0.3

3.0 L/min

A-6

07506C DCN6727

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Teledyne 651 operation manual RIE Read Instrument Errors, RIF Read Aerosol Flow Rate, Rie, Rif