LPS-2 USER MANUAL
2
1. General
The LPS-2 stationary detector is designed to monitor the condition of two sections of a
preinsulated district heating pipeline with a pulse or resistance alarm system. The type of the
system should be specified in the order. The LPS-2 instrument identifies and indicates the
following three conditions of the monitored district heating pipeline sections.
•STAN DOBRY Two sections of the monitored district heating pipeline are
(GOOD CONDITION) in good condition.
(green LED)
•STAN ZAGROŻENIA In at least one of the monitored conditions of the district heating
(DANGER) network, the resistance between the alarm wire and the steel pipe
(yellow LED)
is close to the defined leak resistance threshold. Alarm systems
of the two monitored district heating pipeline sections are in
good condition.
•AWARIA (FAULT) At least one of the following
(red LED)
situations has occurred:
•leak
•no electrical contact between the detector and the steel pipe
•electrical break in the alarm circuit
•electrical short circuit between the alarm wire and the steel
pipe.
Measurement ports located on the side panels of the instrument enable accurate
measurements for every section of the monitored district heating pipeline. Measuring
instruments should be selected in accordance with the type of the monitored alarm system.
In case of a fault, the LPS-2 detector will activate an external alarm device (audible or
light alarm) or communicate information to data acquisition devices. In both cases, the
actuating component is the relay whose contacts are connected to the connector with the
“
ALARM
”
description.
2. Operating notes
The LPS-2 instrument can be connected directly to the ZPB connector.
To connect the LPS-2 detector, insert the plug of the power cable into the socket of a 230 V
50 Hz system. Then, within approx. 1 min, the instrument will perform internal set-up and
conduct the first measurement. During this time, the red LED with the
“
AWARIA
”
(FAULT)
description will blink. Next, depending on the result of the first measurement, one of the
following three LEDs should lit up continuously: green, yellow or red.
The chapter titled TECHNICAL SPECIFICATIONS describes the types of characteristic
conditions of the preinsulated district heating pipeline for a resistance and pulse alarm system
and methods used by the LPS-2 instrument to indicate these conditions. If the yellow LED
lights up, the supervising employee should increase the frequency of observations carried out
with the LPS-2 instrument. If a fault is indicated (the red LED lights up), determine the type
and location of the fault using suitable instruments. If you connect a measuring instrument to
one of the external ports of the detector, the LED indicating the condition of the monitored
alarm system will start lighting up in a different fashion. If, for instance, the yellow LED
(DANGER) was lit up continuously before connecting the meter, it will start to blink after the
