USER MANUAL : CDS552 CIRRUS LOOP LOGGER
DOCUMENT NAME
CLASSIFICATION
DATE
PAGE
CDS552 CIRRUS LOOP LOGGER USER
MANUAL
CONFIDENTIAL
15-JUL-21
24 OF 29
Sometimes it is necessary to re-calibrate the 4-20mA loop to correct it or to re-calibrate for a completely different set of
values. This can be easily achieved by following the below procedure.
1.
Apply a fixed accurate 4mA source to the current loop interface.
2.
Dropdown the 'Calibrate Loop' menu and select 'Set 4mA Point'.
3.
Change the source current on the interface to an accurate 20mA.
4.
Dropdown the 'Calibrate Loop' menu and select the 'Set 20mA Point'.
5.
Change the loop current to any random value between 4mA and 20mA.
6.
Press the 'Get Current Setup' button and read back the settings.
7.
This random loop current should now display correctly in the 'General Details' box as 'Loop Current'.
8.
Disconnect loop current.
Upgrading firmware on the logger can be done through the Bluetooth interface. Newer versions of the software for each
type of device is embedded into the Cloudworks software so will not need an internet connection to collect the data.
When in Command Mode, press the 'Upgrade Firmware' button. The first thing the software will do is to determine the
current firmware version on the logger and see if there is an upgrade available. Should the firmware be up to date, you will
be prompted as such and given an option to re-flash the firmware. Re-flashing can happen if your last upgrade failed and
you would like to try again.
Before continuing, the following prompt will flash on the screen.
Please do not at any stage interrupt the process while the firmware is downloading as this may leave the logger inoperable
and necessitate that it get sent back to the manufacturer for recovery.
Selecting 'Yes' will start the upgrade process. The diagnostic screen will display the progress of the upgrade.
