Intek RheoVac 950A - Manual (Page 21)

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SECTION 4 — MAINTENANCE
4.1 CALIBRATION
The RheoVac instrument is calibrated at the factory in a calibration system which replicates the
condenser and vacuum line environment. The system is designed to simulate the temperature,
pressure, water vapor relative saturation, and flow rate under the gaseous fluid conditions found
within the power plant vacuum line.
In general, calibrations should be valid over a two-year period if the probe is well maintained.
Should the unit require re-ranging or recalibration, note the serial number of the RheoVac
instrument and contact the factory concerning recalibration cost and turn around times. Refer to
SECTION 5 — CUSTOMER SERVICE of this manual for additional information.
Contact Intek for calibration, condenser monitoring service plans, instrument service agreements
as well as other Intek products and services for the condenser and the power industry.
4.2 SPARE PARTS
It is advantageous to have a spare probe. Should a spare probe be desired, it can be ordered and
stored for installation at any time. A spare probe will come with a parameter disk with
calibration files that will need to be uploaded to the main electronics along with instructions to
complete the update and install/replace the probe (see SECTION 4.4).
Spare fuses should be available for replacement of blown fuses. Appropriate fuses to stock are:
x 500 mA fuse, slow blow, Wickmann part number 3720500041 or equivalent, for probes.
x1 A fuse, slow blow, Wickmann part number 3721100041 or equivalent, for the main
electronics.
There are no other normally recommended spare components to stock.
To replace the fuse in the main electronics: locate the AC Power Input board (#01011-5 shown in
Figure 5) in the lower right hand corner of the main electronics box. Slide the power switch to
the “OFF” position to disable power to the electronics. The fuses are shown at locations F1 and
F2 (spare). Gently pull the fuse(s) from their sockets and gently insert the replacement 1 Amp
fuse(s) as appropriate. Slide the power switch back to the “ON” position to enable power to the
electronics. Close hinged lid and verify display backlight is on. Clamp close the enclosure lid,
and tighten the latch screws.