Ecom ecom-DP, Руководство по эксплуатации

Страница: 23 / 26

ecom-DP Page 23
6. Leak Detection
Sweep the sensor head slowly along the gas installation to be checked. As soon
as the unit nears a leakage, the display indication reacts and, by exceeding the
first threshold (2 lines in display), the red LED blinks.
The blinking red LED together with an acoustical signal (disconnectible) shows
an increased concentration of gaseous hydrocarbons. Parallely to the increasing
concentration, the signal tone is getting more intensive and the red LED blinks in
shorter intervals, so that a leakage can be accurately localized.
The largest concentration registered so far is displayed with a grey bar (dragging
announcement). The sensitivity of the sensor (middle sensitivity after switching
on) can be adjusted in 3 steps (see Adjustments).
7. Zero Point
Indication drifts from the zero point can be corrected while pressing the
<HOLD>
key (dragging announcement gets erased). pressed longer than 2 seconds. The
change of the zero point is indicated by flashing of the first bar. If the
<HOLD>
key is kept pressed longer than 2 seconds, the original zero point gets back (no
flashing of the first bar).
Substances such as silicone, hydrocarbons, leadtetraethyl,
sulfur connections and organic phosphorus connections
cause partially irreversible sensitivity losses
(sensor poisoning)!