HF scientific MicroTOL Online Turbidimeter - Manual (Page 24)

MICRO TOL (5/10) 18
Rev. 4.8
7.4 Configuring the RS–485 Port
If the instrument is equipped with this option, and the I/O selection is changed to 485,
prompts will appear for setting the baud rate and the address.
Select the correct baud rate (1200, 2400, 4800, 9600, or 19200) for operation of the I/O
port by pressing the
t or u buttons to change the displayed baud rate.
Press the
↵ button to continue on and select the desired instrument address using the t or
u buttons. Once the selection is satisfactory, press the ↵ button.
Select the address using
t or u buttons. Press the ↵ button to save.
To enable the Modbus mode, select ASCII or RTU. For more information refer to the
Modbus Manual (Catalog #19777). This manual can also be downloaded for no charge at
www.hfscientific.com .
7.5 Configuring the Alarms
Two relays are provided that are designed to operate as two independent programmable
alarms. Three types of information must be input to fully program each alarm:
1. The alarm function (HI, LO, OFF or Error)
2. The alarm set point (level at which the alarm activates)
3. The delay time for the alarm: the time that the set point must be exceeded prior to
alarm activation and the time before resetting the alarm (prevents chatter in the relay)