H
A R D W A R E
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N S T A L L A T I O N
Typical Phone Modem Installation
7
Phone Modem Installation Instructions
1. Install and set up an internal or external modem (according to the instructions supplied
by the manufacturer) for use with your computer.
Make a note of the COM port used by the modem. You will need this informa-
tion when entering serial port settings for the station.
2. At the station console site, put the external modem in a location where it can connect
to both the logger and a phone jack and plug it into the phone jack. DO NOT TURN THE
MODEM ON AT THIS TIME.
The cable connecting the data logger to the modem is 8’ (2.4 m) long. If you
need to mount the station console more than 8’ from the modem, use a 40’ (12
m) standard 4-conductor extension cable. Do not attempt to use more than 40’
of extension cable, or the data logger may have difficulty communicating with
the modem.
3. Plug the external modem into the phone jack.
4. Place the console in setup mode.
Press and hold the DONE key, then press the DOWN arrow key. Entering
Setup Mode ensures the station is not writing any data to memory and saves
all current highs, lows, and daily totals.
5. Remove the battery cover from the console back and remove all power by removing
the batteries and AC-power adapter, if present.
Failure to remove power to the console before installing the data logger may
cause damage to the data logger or console.
6. Carefully insert the data logger into the large receptacle jack marked
EXPANSION
inside the battery compartment
Guide the data logger cable through the square slot below the data logger
receptacle.
CAUTION:
Make sure that whenever you connect or disconnect the data logger from the con-
sole that the console is NOT powered up. Plugging or unplugging the data logger
while power is applied can damage or lock up the data logger.
7. Connect the Telephone Modem Adapter to the external modem.
Do not use a DB25 (not included) adapter and a gender changer to attach the
logger to a modem because it will not work. Do not use an older Davis tele-
phone modem adapter, either, as it will not work.
8. Insert the cable plug at the end of the cable into the Telephone Modem Adapter.
9. Restore power to the weather station by reinstalling the batteries and reattaching the
power adapter, if present.
The weather station should beep three times; each beep should occur within
about one second of the others.
10. Replace the battery cover, ensuring that the data logger cable exits through the square
slot.
11. Turn the modem on.
