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Chapter 2
| Transmitter Overview
Purpose
Gas detector OLCT 80 is a digital and analog transmitter designed to measure
combustible and toxic gases, as well as oxygen levels, in ATEX zones. The
OLCT 80 has 2 auxiliary inputs, ANA1 and ANA2, with a 4-20 mA signal, to
monitor up to 3 parameters simultaneously.
The transmitter also includes a digital LCD display, two alarm relays with
programmable thresholds and a fault relay.
The device is programmed using an intrinsically-safe infrared remote control
that can be used in ATEX zones.
Versions
Explosion-proof, intrinsically-safe versions
The following types of transmitters are available:
■
Explosion-proof: the enclosure and sensor pack assembly is explosion-
proof. The explosion-proof certified version is designated OLCT 80d.
■
Explosion-proof + intrinsically-safe: the transmitter's enclosure is explosion-
proof and the sensor pack is intrinsically-safe. Only the versions using an
electrochemical sensor are available in this style. The explosion-proof,
intrinsically-safe certified version is designated OLCT 80id.
The table below lists the versions available.
Catalytic sensor
Electrochemical sensor
XPIR infrared sensor
Table 1: comparison of OLCT 80 detectors.
OLCT 80d
2 – Transmitter Overview
OLCT 80id
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