Multi-Alarms in USB Loggers

USB loggers can be configured for up to 6 different alarm trigger conditions, depending on the model.

• USRIC-4 has a single primary upper and a single primary lower alarm.
• USRIC-8, UTRIX-16, UTRED30-16 and UTRED30-Wifi allow four freely configurable alarms in addition to the primary upper and lower alarms.
• UTRID-16 allows a total of three upper and three lower alarms.

Initially, start with the primary upper and lower alarms trigger conditions and activate additional conditions separately. For each threshold value you enable, you can set the usual values such as threshold temperature, activation type and alarm delay value.

You need to observe some basic rules when entering alarm conditions into the configuration screen in (missing or bad snippet):

• A primary upper alarm must be entered before more upper alarms can be entered.

• A primary lower alarm must be entered before more lower alarms can be entered.

• Any additional upper alarms must have higher threshold values than any previously entered alarm.
• Any additional lower alarms must have lower threshold values than any previously entered alarm.
• You can enter a different number of upper and lower conditions, or only upper, or only lower conditions, or none at all. You can, however, not make all alarms upper alarms, and you cannot make all alarms lower alarms either.
• Threshold values for adjacent alarms can be equal and combined with different alarm types and delay time values. For example, you can enter a primary upper alarm with an 8°C threshold and 10 accumulative readings, plus an alarm with an 8°C threshold and 5 consecutive readings. In this instance the alam will be triggered, if either 10 readings in total are above 8°C, or 5 consecutive readings above 8°C have occurred.

Any alarm condition that is activated will be shown on the PDF and in the software.

USRIC-8M and UTRIX-16M models

For a short period in 2017, USRIC-8 and UTRIX-16 models with multiple alarm threshold values were sold with the suffix M after the model name, i.e. USRIC-8M and UTRIX-16M. Effective November 2017 this suffix has been dropped from the model designation, and USRIC-8 (from serial number 5035127752) and UTRIX-16 (from serial number 5040022407) now support multiple alarm threshold value. Models without the M suffix delivered before this date only allow simple alarm settings with one upper and one lower alarm (they can also not be upgraded).

For the UTRID-16 a slightly different screen is shown. Here, the alarm symbols that appear on the LCD are depicted next to the entries in the software. The rules above are the same with one notable addition, that a maximum of three upper and three lower alarm conditions can be entered.