13
Special information
Please take into account that ultrasonic sources
like pumps or steam reducing stations in the
proximity of the steam trap to be tested may
falsify the result. In this case, steam loss may be
indicated even though the traps operate correct-
ly. This can be verified by scanning the adjacent
pipelines. If the deflection remains unchanged
or increases, this must be attributed to a foreign
ultrasonic source. Switch off sound emitting plant
components, if possible.
Intermittently operating steam traps cause re-
current meter deflections which may even reach
the end of the scale. Thermostatic traps (with
bimetallic control or membrane regulators) may
operate within the specified pressure and flow-
rate range either continuously or intermittently. In
this case, steam loss can usually be excluded. A
recurrent meter deflection here indicates that the
steam trap is operating correctly.
Thermodynamically controlled steam traps
always operate intermittently. Any steam loss
rises with increasing lift frequency on this trap
type. Only a constantly large meter deflection can
clearly indicate steam loss.
Essentially the same considerations as men-
tioned for thermodynamic traps also apply in
the case of steam traps with open floats. How-
ever, inherent steam loss definitely occurs on
float-operated traps even when the trap operates
intermittently.
Before performing the tests, use the technical
plant data (service pressures, differential pres-
sures, flowrates etc.) to at least estimate wheth-
er the trap flowrate lies within the testable range.
After operation
➢
Charge the equipment battery as described in
the section "Measurement preparations".
Servicing the equipment
The equipment does not require any particular
maintenance work.
Replacing the battery
Attention!
➢
The battery (9 V, NiCd) of the display
device may only be replaced by the
manufacturer!
The service life of the permanently in-
stalled battery is five to seven years with
normal equipment use. If the battery is
defective, please send the equipment to
GESTRA, Bremen for the battery to be
replaced.
Removing external dirt
Attention!
Risk of damage to the device due to fluid
ingress.
➢
Make sure that no fluid can penetrate
into the equipment.
➢
Only clean using damp cloths.
➢
Remove dirt from the equipment with clean
water and a lint-free cloth.
➢
Remove stubborn dirt with a cleaning agent
suitable for the material and a lint-free cloth.
Checking parts for damage
➢
Check that all equipment components are in
perfect condition before and after use.
➢
Do not bring damaged components into ser-
vice.
➢
Replace any damaged components.
