The Digital Temperature Power Monitor (DTPM-3000) is designed to display temperature, and to warn of temperature and power supply failures occurring in most controlled temperature applications. When a high out of range temperature is reached, or the power supply is interrupted, the DTPM-3000 system provides a visual and audible signal.
It is designed to provide a different visual and audible signal for each type of occurrence. The DTPM-3000 series monitors are equipped with a replaceable alkaline 9V battery. In the event of a power failure, the DTPM-3000 will continue to operate and monitor for a problem for approximately 2 hours. Under normal conditions, the battery should be replaced annually, or when the on/off audible signal is given for low battery.
The DTPM series of systems operate on standard 115VAC @ 60Hz or 220VAC @ 50/60Hz. Units operating on 115VAC are powered by an AC receptacle mounted power supply, and 220VAC units are hard wired to the AC supply.
Digital Instruments DTPM-3000 Manual pdf