Omega Vehicle Security HHTFO manual Power jack, Probe connector, 10 RS232 communication interface

The lock feature on your SD card is engaged. You need to unlock it before using the card.

The HHTFO is running from the internal batteries. Icon indicates the approximate amount of charge remaining. When almost fully empty, the message “LOW BATTERY” is also displayed, for about 5 to 15 minutes, before auto-shutting off without further warning.

Note: This display is only valid when rechargeable batteries (NiMH or NiCd) are used; if you are using non-rechargeable alkaline batteries, the charge remaining will quickly drop towards the end of life of these batteries.

4.8 Power jack

Omega Engineering recommends that you always use the supplied 6VDC power supply module. If you use a different supply module, it must supply a DC voltage ranging from 5.2 to 6.8VDC; the center pin is the + contact. If you accidentally use a DC supply that has a voltage outside this range (max of 28 VDC), this should cause no harm to the HHTFO.

The internal batteries cannot be charged by this module; to charge your batteries, you need to remove them from the HHTFO, and use a separate charger; alternatively, you can also use non-rechargeable batteries, size AA.

Compatible battery types are AA alkaline, Ni-Cd and Ni-MH.

4.9 Probe connector

This ST connector mates to an Omega Engineering temperature probe.

4.10 RS232 communication interface

This port is used to configure and download information from the thermometer. The pin-out is standard for connection to any PC computer COM ports. Use a simple pin-to-pin wired cable (not a null modem cable) to connect to your computer. Baud rate is fixed at 9600. See Section 6 for a complete description of the serial commands that are available.

15