HF scientific MicroTOL Online Turbidimeter - Manual (Page 30)

MICRO TOL (5/10) 24
Rev. 4.8
7.15 Desiccant Alarm
When the humidity detector in the Micro TOL indicates that the internal environment is
close to the point where humidity could cause condensation, the instrument will display
DESC as a screen warning.
If desired, a desiccant warning can:
• Activate the alarms relays.
• Can activate an alarm condition on the 4-20mA.
To activate the alarm relays when the desiccant fails, select set one or both alarms to Error
(see section 7.5 Configuring the Alarms).
To activate an alarm condition on the 4-20 mA set the ERLV to one of the three alarm
states (see section 7.3 Configuring the Error Level)
For either alarm modes to activate On must be selected in the DESC menu. The default
for this menu is OFF. Make selections using the
t and u buttons then press the ↵ button
to move to 4-20 mA calibration.