18
WIKA operating instructions, model CTD9100-1100
14030725.02 08/2019 EN/DE
EN
9. Faults / 10. Maintenance, cleaning and recalibration
Error
Causes
Measures
The display indicates a
different temperature from the
one measured in the block
The thermocouple is broken
Send in for repair
The controller is broken
The temperature does not stop
at the value of the point that
has been set.
The supply card is broken
Send in for repair
The temperature does not
decrease to the set value as
quickly as it should
The controller is broken
Send in for repair
The cooling fan is broken
The display indicates 1.300 °C
The reference thermocouple is broken
Send in for repair
10. Maintenance, cleaning and recalibration
Personnel:
Skilled personnel
Protective equipment:
Protective gloves
For contact details, please see chapter
1 “General information” or the back page of the
operating instructions.
10.1 Maintenance
The instrument described here are maintenance-free.
Repairs must only be carried out by the manufacturer.
This does not apply to the fuse replacement.
Before replacing the fuse, the temperature
dry-well calibrator must be disconnected by
unplugging the mains cable from the power
supply outlet.
Only use original parts (see chapter 13 “Accessories”).
10.2 Cleaning
CAUTION!
Physical injuries and damage to property
and the environment
Improper cleaning may lead to physical injuries
and damage to property and the environment.
Residual media in the dismounted instrument
can result in a risk to personnel, the environment
and equipment.
▶
Use the requisite protective equipment.
▶
Carry out the cleaning process as described
below.
1. Cool down the temperature dry-well calibrator as
described in chapter 8 “Cooling down the metal blocks”.
2. Before cleaning the temperature dry-well calibrator, it
must be switched off and disconnected by unplugging the
mains cable from the power supply outlet.
3. Clean the instrument with a moist cloth.
Electrical connections must not come into contact with
moisture.
CAUTION!
Damage to the instrument
Improper cleaning may lead to damage to the
instrument!
▶
Do not use any aggressive cleaning agents.
▶
Do not use any hard or pointed objects for
cleaning.
4. Clean the instrument before returning it, in order to protect
persons and the environment from exposure to residual
media.
Cleaning calibrators with inserts
With calibrators with inserts, during operation, a small
amount of abrasion dust can cause the block and the insert
to become jammed. To prevent this, on a regular basis and
before any long period out-of-use, remove the inserts from
the calibrator heating block. Blow out heating block bores
with compressed air and clean the bore and sleeve with a dry
cloth.
Cleaning fan guards
On the base of each calibrator is a dense fan grille, through
which the cooling air is supplied to the calibrator. Depending
on the cleanliness of the air, clean the grille at regular
intervals by vacuuming or brushing.
External cleaning
Clean the outside of the instrument with a damp cloth and
some water, or with a solvent-free light detergent.