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Preliminary operation manual EE600 Differential Pressure Sensor
6 Maintenance and service
EE600 does not require any special maintenance, nevertheless it is recommended to perform a zero
point adjustment every 12 month. If needed, the enclosure may be cleaned and the device may be
re-adjusted as described below.
6.1 Cleaning
Use a damp soft cloth to remove deposits of dust or dirt from the exterior of the device and from the
display. Do not attempt to clean the interior of the device. Do not use any solvents, alcohol or abrasive
cleaning agents.
6.2 Repairs
Repairs may be carried out by the manufacturer only. The attempt of unauthorized repair excludes any
warranty claims.
6.3 Readjustment of EE600
A periodical readjustment of EE600 might be required by the regulations of certain industries or by the
need of best long-term measurement accuracy. The zero point and the span point can be adjusted with
push buttons on the EE600 electronics board.
For adjustment the device must be powered and the enclosure cover removed. Consequently, the
adjustment may be performed by authorized staff only, observing the handling of electrical sensitive
devices (ESD).
6.3.1 Zero Point Adjustment
The zero point adjustment is used to correct an eventual zero point deviation.
a. Remove the tubes from both pressure connections of the EE600. By this the pressure is same at
both connections.
b. Press “zero point” button 1-2sec. (see „3 Product Description“).
c.
The successful zero point adjustment is confirmed by the green LED turning on for 2 seconds.
d. The red LED turning on for 2 seconds indicates that the zero point adjustment did not succeed. In
this case repeat b.
e. The zero point adjustment (b.) may not succeed because of a deviation higher than 5% of the
original full scale of the device. This is 50 Pa for the 0 – 1000 Pa range and 500 Pa from the 0 –
10000 Pa range. In such a case, the zero point adjustment can be forced by pressing and holding
the zero point button for min. 10 sec.
f.
The successful zero point adjustment is confirmed by the green LED turning on for 2 seconds.
6.3.2 Span Point Adjustment
The span point adjustment is used to correct an eventual deviation of the span value.
Important:
Make sure to perform a zero point adjustment as above before any span point adjustment.
a. Connect the differential pressure reference device/calibrator to the EE600 and set it according to
the EE600 span value to be adjusted.
Observe the operation manual of the reference device.
b. Press the span point adjustment button (see „3 Product Description“).
c.
The successful span point adjustment is confirmed by the green LED turning on for 2 seconds.
