Omega Vehicle Security manual HHTFO111A

“i” Returns general information regarding the instrument, as well as some parameters that have been programmed previously in the thermometer (either by RS-232 commands or via the keypad):

Ex:	Model:			HHTFO101
	Option:			NB Channel: 1
	Mode:			Continuous Scanning Mode
	Scanning rate:			Fast
	Serial:			HHTFO111A
	Internal Software:			V1.21
	Last Factory Calibration*: 05/02/04 (YY/MM/DD)
	Unit			oC
	Keyboard Status:			Unlock
Channel		Zero	Span	Enabled	Temperature offset*
1		xxx.x	xxx.x	Yes/No	±xxxx.x

*: Temperature differential that is a consequence of the “f” command.

“q” “q” allows for selecting the fast (q+) or the slow (q-) acquisition mode. This is equivalent to the Sampling Rate selection that is available on the FOB100 keypad. In slow mode, the last 4 temperatures are averaged before being displayed or sent to the RS-232 port; this provides a better reading at the expense of being slower.

“t” or “t[i]” Returns the current temperature reading for channel # i. “---.-” is displayed if the specified channel number is not currently enabled or when no valid temperature is available for the requested channel. However, during the initial warm-up time, the error “Err1” is sent in response to the “t” command. For multi- channel instruments, if the “t” command is received without parameter, the temperatures for all channels are returned. All temperatures are returned in oC or oF unit, as specified by the “u” command.

Ex: “t4 E“ will return the temperature for channel # 4. “t E”, with the HHTFO101 thermometer, will return:

+24.3<CR>

*

The “t” command is also available in a special “ta” version, that can be useful for continuously and automatically monitoring all enabled channels. This special mode is recommended when automatically acquiring temperature readings with a suitable data-logging software, and can be activated by issuing the “ta+” command, or deactivated with the “ta-“ command. Once activated, the following information is automatically sent when the temperature on a channel has been acquired:

“C:I;T: ±xxx.x<CR>”

where i is the channel number, and xxx.x is the temperature reading (signed number).

“u[i]” Set units of measurements to either Celsius (i=c) or Fahrenheit (i=f). Note that this unit selection is the same as the temperature unit selection made from the keypad (if the display option is installed).

Ex: “uc E“, to select ºC (Celsius).

“y” The “y” command can be used to confirm the “signal strength” of a probe and/or its connection. It can be used as a diagnostic tool to confirm the good operation of a probe and its patch cord (if applicable) connected to a channel. The returned value can be between 0.3 to approximately 3.00; a higher value is better. A minimum of 1.25 is required for a channel to return a temperature.

Ex: “y E”, with the HHTFO101 thermometer, will return:

CH1: power:2.61, lamp attenuation: 250, CCD time: 50ms (fixed)<CR>

*: 0.3 to 1.1 indicates that no probe is detected for this channel.

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