Maintenance, Cleaning And Recalibration; Maintenance; Cleaning; Recalibration - WIKA CTD4000 Betriebsanleitung

10. Maintenance, cleaning and recalibration

10. Maintenance, cleaning and recalibration
Personnel: Skilled personnel
Protective equipment: Protective gloves
For contact details see chapter 1 "General
information" or the back page of the operating
instructions.
10.1

Maintenance

The instrument described here is maintenance-free.
Repairs must only be carried out by the manufacturer.
This does not apply to the fuse replacement (see chapter
4.5 "Fuse").
Before replacing the fuse, disconnect the
temperature dry-well calibrator by unplugging the
power cord from the mains socket.
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 instrument can result in a
risk to persons, the environment and equipment.
▶
Wear the requisite protective equipment.
▶
Carry out the cleaning process as described
below.
▶
Clean the calibrator only when it is cold.
1. Cool down the temperature dry-well calibrator as
described in chapter 6.9 "Cooling down the metal block".
2. Before cleaning the temperature dry-well calibrator, switch
it off and isolate it by unplugging the power cord from the
mains socket.
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, in order to protect persons and the
environment from damage through residual media.
WIKA operating instructions, model CTD4000
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 insert from
the calibrator heating block. Blow out heating block bores
with compressed air and clean the bore and insert with a dry
cloth.
Liquid or oil inside the block lead to oxides
or verdigris on the insert with use at high
temperature. In this case, the insert could
become stuck.
Liquid which may penetrate the calibrator can
cause damage or lead to the build-up of toxic
fumes.
Cleaning of the fan grille
On the base of each calibrator is a dense air 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.
10.3

Recalibration

DKD/DAkkS certificate - official certificates:
The temperature dry-well calibrator has been adjusted and
tested before delivery using measuring devices that are
traceable to nationally recognised standards.
On the basis of DIN ISO 10012, the temperature dry-well
calibrator, depending on the application, should be verified at
appropriate periodic intervals.
We recommend that the instrument is regularly recalibrated
by the manufacturer, with time intervals of approx. 12 months
or approximately 500 hours of operation.
The basic settings will be corrected if necessary.
The basis of the recalibration is the guidelines of the German
Calibration Service, DKD R5-4. The measures described
here should be used and followed for recalibration.
EN
25