Carrier 69NT40-511-199 manual USDA/ Message Trip Comment, Usda Recording, Pre-Trip Data Recording

Left Display:	“dALnn” where nn = the alarm
	history entry 01-08
Right	“xA nn” where x = “I” (inactive) or “A”
Display:	(active)
Or:	“----------” if no alarms are currently in
	the alarm history list

h. Alarm Processing

The DataCORDER contains an eight alarm history queue which will contain the first eight alarms detected by the DataCORDER. The alarms and their corresponding alarm codes are specified in Table 3-7. The alarm queue will be located in the Battery Backed RAM (BRAM). The queue will also have a corresponding status which will indicate whether each alarm is currently active or inactive. If multiple consecutive occurrences of an alarm are generated, only the first will be stored. The queue may be cleared by using the keypad. (If more than eight alarms occur before the queue is cleared, later alarms will be ignored.) In addition, AL91 alarm code will appear if the DataCORDER queue is full.

The out of range value is as follows:

Thermistor Inputs:	Low limit = --50.0 degC
	High limit = 70.0 degC

3.3.6USDA/ Message Trip Comment

A special case event is supported for allowing the user to enter comments for a (USDA or any message) trip recording. The comments will be received from the interrogator and have a maximum length of 78 characters. Only one comment will be recorded per day. In the event that multiple comments occur, then only the last is saved.

3.3.7USDA Recording

A special type of recording is provided for USDA cold treatment purposes. Cold treatment recording requires three remote temperature probes to be placed at various locations of the cargo. Provision is made to connect these probes to the DataCORDER via receptacles located at the rear left-hand side of the unit. Four (five, on some units) receptacles are provided. Four (three-pin) receptacles are for the probes and one (five pin) receptacle is provided for the Interrogator. All receptacles are sized to accept a Deutsch HD16-5-16S size plug with a tricam coupling locking device. The DataCORDER inputs are designed to accept a two wire thermistor probe.

A label on the back panel of the unit shows which receptacle is used for each probe. The USDA #1, #2 and

#3 probes (and possibly the optional Cargo probe) are installed in their receptacles.

The DataCORDER records up to six probe temperatures (supply, return, USDA #1, #2, #3 and an optional cargo probe #4), at the logging interval.

The standard DataCORDER report displays the supply and return air temperatures. The cold treatment report displays USDA #1, #2, #3 and the supply and return air temperatures. Cold treatment recording is backed up by a battery so recording can continue if AC power is lost.

When the Relative Humidity Set Point mode is activated or de-activated (ie., Controller function code Cd33), this status is stored in the DataCORDER memory and reported at the next recording, as are like events such as economy mode and bulb mode.

3.3.8Pre-Trip Data Recording

The unit is equipped with the ability to record pass/fail information along with unit data resulting from the initiation of pre-trip (see section 3.2.2). The data is time-stamped and may be extracted via interrogation using CTD’s interrogation program. See Table 3-10 for a description of the data stored in the DataCORDER for each corresponding Pre-Trip test.

3.3.9DataCORDER Communications a. DataCORDER Retrieval -- Interrogation

Data retrieval from the DataCORDER can be accomplished with three devices: a CTD DataReader and DataView software, a stand-alone DOS-base portable computer with appropriate cable and DataView software, or a Remote Monitoring Unit (RMU).

NOTE

The RMU designation is used in the industry. Be aware that CTD uses the designation CI (Communications Interface Module) on its schematics.

The optional interrogation software for a portable computer is supplied on a 3.5 and 5.25 inch floppy disk. This software allows interrogation, screen view of the data, hard copy report generation, cold treatment probe calibration, cold treatment initialization and file management.

NOTE

Refer to Interrogation manual 62-02575 for a more detailed explanation of the interrogation software.

A short report on that interrogation can be displayed on the computer to identify key information such as Trip

SECTION 3

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