HF scientific MicroTOL Online Turbidimeter - Manual (Page 23)

MICRO TOL (5/10) 17
Rev. 4.8
Note: The 4MA can be set higher than the 20 MA level to invert the output current if
required. This may be required to control a dosing pump
The next, prompt will be the turbidity level assigned to the 20 mA output level (20MA) on
the lower row of the LCD display). Select the turbidity level to assign to the 20MA using
the
t and u buttons. Once the desired level has been set, press the ↵ button to accept it.
The factory setting is 10.00 NTU.
7.3 Configuring the Error Level
In case of an error in the Micro TOL, the 4-20 mA reading can be used to indicate a
problem by sending the current to either 4.00 mA, 2.00 mA or 0 mA or OFF. In the case
of OFF, the 4-20mA is unaffected by any error condition. The factory default setting is
OFF. Select the desired ERLV by using the S and T buttons then press the  button to
accept the desired error response.