Справочник Пользователя для Hach 900 MAX

8990cm.fm

Loosen the four screws on the cover of the cell phone enclosure and 
remove the cover, to view the signal strength. The signal strength is 
indicated by the number of dashes across the bottom of the cell phone 
display. The more dashes the greater the signal.

In order to ensure reliable communications between the sampler and the host 
computer, it is absolutely essential that the host computer is equipped with a 
Cellular Compatible modem. The modem on the host computer must support 
the “MNP.10ED” protocol. Computers equipped with modems that do not 
support this protocol may be able to connect to the sampler but will not be 
able to maintain reliable connections.

With Cellular Modem Scheduling enabled, both the modem and cell phone 
power will simultaneously be turned off and on at user defined intervals to 
conserve battery power. If Cellular Modem Scheduling is disabled the sampler 
will assume that a land line is available and that the cell phone is not 
connected to the sampler. With Cellular Modem Scheduling disabled (and the 
sampler on battery power) the sampler will leave the modem turned off until a 
call is received on the land line. 

If the sampler is on ac power or the battery voltage is over 14.5 volts, the 
power to both the cell phone and modem will constantly be on regardless of 
whether Cellular Modem Scheduling is enabled or not.

If the sampler is configured to call a pager for alarms and the alarm condition 
is met, the sampler will still call the pager even if modem scheduling is 
disabled. In this situation the cell phone and modem will temporally be 
powered back up again to allow the sampler to call the pager and transmit the 
alarm code. However, as soon as the alarm code is transmitted, the power to 
the cell phone and modem will again be turned off.

To enable Cellular Modem Scheduling, Modem Power must be enabled.

Enable the Cellular Modem Scheduling using the

 key.  

Press 

 to continue.