Union Instruments CWD3000 EXP, Operating Instructions Manual

Page: 102 / 120

Maintenance
102
Check
Interval
(recommended)
After commissioning
Check and, if necessary, update the firmware version. As required
Store the current configuration As required
Semi-annual check
Check sieve in exhaust air duct for soiling; remove off-gas line for
this purpose.
Every 6 months
Perform calibration (at shorter intervals depending on accuracy
requirements).
As required
Check hose connection to the density measuring cell/sensors for
porosity.
Every 6 months
Check membrane on the gas pressure controller for porosity or lack
of elasticity.
Every 6 months
Remove 2 / clean 3 thermoelectric battery and heat exchanger. Every 6 months
Replace the seal on the heat exchanger. Every 6 months
Clean
4
the gas and air nozzles. Change O-rings, if necessary. Every 6 months
Annual check
Replace neoprene hoses inside the combustion calorimeter. Annually
Clean the entire system. Annually
Check screw fittings of line on housing and inside the device for
firm seating and proper seal.
Annually
Gas inlet solenoid valves; check connections for intactness, check
functioning (switching).
Annually
Check pressure switches and seal. Annually
If necessary, use load from environment.
Check seal of housing for functioning and damage.
Each time the doors
are opened
Check compressed air filter for soiling/blockage/condensate,
optionally installed by owner.
As required
Check compressed air inlets/outlets for soiling (oil, dust etc.) and
corrosion, have cleaned by manufacturer.
As required
Check compressed air inlets/outlets on/in housing for soiling (oil,
dust etc.) and corrosion.
As required
Additional information:

Included documents
2
Flow plates are attached on the side of the thermoelectric battery and in the thermal elements of the
combustion calorimeter. The flow plates must not be twisted when removing the thermoelectric
battery. The thermoelectric battery must be pulled out as far as possible and then tilted to the side.
3
Cleaning of the heat exchanger with water followed by thorough drying.
4
Clean the nozzles using a volatile solvent.