Calibrating The 4 - 20 Ma Current Loop; Service - ABB LLT100 Operating Instructions Manual

13.6.6 Accessing Instrument IDs
When contacting ABB for troubleshooting or service requests,
you might be asked to provide the instrument manufacturing
and/or device identifier.
To obtain such identifiers, select the menu Communication >
Manuf. ID or Device ID.
13.7 Calibrating the 4 – 20 mA current loop
LLT100s are factory-calibrated to reflect the published
declared performance specifications. No further calibration is
required in normal usage condition.
The current loop calibration function allows the instrument to
compensate for potential drifts over time in values read back
from the communication board electronics.
Performing this calibration requires a 24 VDC input in series
with an ammeter.
Figure 33 Calibrating the 4–20 mA values
13.7.1 Calibrating the 4 – 20 mA values
As shown in Figure 8, using a DC ammeter in series with a
24 volt input:
1. From the Calibrate menu, select Loop Test > Set 4 mA,
and change the default value to the value indicated on the
ammeter display.
2. While still in the Loop Test menu, select Set 20 mA, and
change the default value to the value indicated on the
ammeter display.
3. (if necessary) To validate that calibration was successful,
go to Set Output Value and enter a current value (between
3.5 mA and 23.5 mA) that you want the instrument to
generate. The ammeter should have a reading identical to
the value entered.
3.09 A

13.8 Service

NOTICE
ABB may refuse to service instruments that are not free
of hazardous materials (acids, alkalis, solvents, paints,
etc.) or dirt.
If you are unable to solve a problem, contact ABB. Service is
only to be handled by authorized factory-trained personnel.
Before contacting ABB, please check the following:
– All cables are properly installed.
– All relevant troubleshooting steps outlined in this manual
have been followed.
Refer to the back cover for contact details.
13.8.1 Returning instruments
If you need to return your instrument for repair or recalibration
purposes, preferably
transportation box and included shock-absorbing packaging
to reduce the chance of damage. Otherwise, at least use
suitably secure packing material.
NOTICE
Improper packaging of the device may result in
additional repair cost and/or a voided warranty.
According to EC guidelines and other local laws related to
hazardous waste, owners of such waste are responsible for its
disposal. Owners must follow proper regulations for shipping
purposes.
Before sending a LLT100 to ABB, you must first:
1. Clean and decontaminate the instrument.
2. Locate the instrument serial number on the identification
plate (see, "Instrument labels", on page 51).
3. Contact ABB's after sales service to obtain a Contamination
Data Sheet.
4. Fill out and sign the Contamination Data Sheet.
Do not forget to check the relevant boxes of the Non-
contaminated Material Declaration section.
5. Return the fully completed Declaration to ABB.
6. Obtain the authorization from ABB personnel.
You must receive a Return Merchandise Authorization
(RMA) number prior to sending back the instrument to ABB.
Otherwise, receipt for the instrument will be declined.
reuse the original cardboard
OI-LLT100-EN Rev. D | User Guide 43