Watts HF scientific 28052, Owner'S And User'S Manual, Page: 27 / 67

Catalog No. 29290 20
Rev 3 06/2020
a. AUTO mode is the normal automatic operation. This is the default
mode when power is applied or restored. The other three modes of
operation are limited to 15 minutes with no key presses after which
they will return to AUTO made operation.
b. CAL is the calibration mode. All reading outputs and alarms are
held while in this mode of operation. The instrument was calibrated
and tested prior to leaving the factory. Therefore, it is possible to
use the instrument directly out of the box. Under normal conditions,
re-calibration is required once every three months. Quarterly
calibration ensures performance within accuracy specifications.
•
Enter the CAL mode of the instrument by pressing the

or

buttons until the arrow beside CAL is illuminated, then
press the  button.
•
Use the

and

buttons to move forward and backward
through the calibration points.
• To exit the
CAL
mode start a calibration point after the
countdown starts press

or

. When the screen shows
ABRT press the

button.
•
Relay contacts and the 4-20mA will be frozen (held at the
current state) while the instrument is in the calibration mode.
• While in the calibration mode, the instrument has a time-out
feature that automatically returns the system operation to the
AUTO mode after a fifteen (15) minute period of inactivity.
c. CONFIG is the configuration mode. In CONFIG mode, you can
customize the instrument according to needs and preferred
operation at any time during normal operation. The CONFIG mode
has been split into sub-menus to facilitate instrument configuration.
This is also where logged files and calibration logs can be
downloaded and where new software, when available, can be
uploaded.
•
Enter the CONFIG mode of the instrument by pressing the

or

buttons until the arrow beside CONFIG is
illuminated, then press the

button.
• To exit the CONFIG mode at any time, press the

button.
•
The

and

buttons are used to move forward and
backward through the menus.