HF scientific MicroTOL Online Turbidimeter old series- 0-1000 NTU - Manual (Page 27)

MICRO TOL (12/04)
Rev. 2.7 21
The current selected number of seconds will be shown. You can select the desired delay
off time for this alarm using the
t and u buttons. Once you have set the desired delay
time, press the
↵ button to accept it. After you complete the settings for alarm 1 you will
be prompted to set up information on alarm #2.
7.5.2 Alarm 2
Repeat the procedure listed in section 7.5.1 to set up the parameters for alarm 2. If you
select to turn the alarm OFF, you will be immediately prompted to set up the 4-20 mA
output (see section 7.5.3 below). If, on the other hand, you selected one of the other
functionalities you will be prompted to set the delay times and the set point as with Alarm
#1.
Once you complete the selections for Alarm #2 you will be prompted to set up the analog
output.
7.5.3 Setting the 4-20mA Output (if used)
The output (O/P) selection allows you to turn the 4-20 mA analog output on (4-20), or off
(OFF). You can select the desired analog output operation using the
t and u buttons.
Once you have set the desired operation, press the
↵ button to accept it.
If you selected to turn the 4-20 mA output on, you will be prompted to set the lower
(LOLM) and upper (UPLM) turbidity limits corresponding to the 4 mA and 20 mA
output levels. First, you will be prompted with the turbidity limit assigned to the 4 mA
output level:
Select the turbidity level you wish to assign to the LOLM using the
t and u buttons.
Once you have set the desired level, press the
↵ button to accept it.
Next, you will be prompted with the turbidity level assigned to the 20 mA output level
(UPLM on the lower row of the LCD display).