Det-Tronics Open Path Eclipse Instructions Manual page 37

Special Conditions for Safe Use for the [ib] HART communication port only:
• The intrinsically safe output on the HART Communicator Port is internally connected to ground and will therefore
not withstand a dielectric strength test.
• For installations in which both the Ci and Li of the intrinsically safe apparatus exceeds 1% of the Co and Lo
parameters of the associated apparatus (excluding the cable), then 50% of Co and Lo parameters are applicable
and shall not be exceeded. The reduced capacitance shall not be greater than 1 µF for Groups IIA and/or IIB, and
600 nF for Group IIC.
• The Infrared Hydrocarbon Gas Detectors shall be powered from a Safety Isolating Transformer according to EN/
IEC60742 or EN/IEC61588.
Always ensure that the detector/junction box hazardous (classified) location ratings are applicable for the
intended use.
Additional Safety Notes:
• For ambient temperatures below –10°C, use field wiring suitable for the expected conditions, and for ambient
temperatures above +60°C, use field wiring suitable for 20°C above the maximum expected conditions.
ACCURACY (per IEC 60079-29-4)
4-20 mA Model: ±0.25 LFL-meters or ±12.4% of applied gas concentration, whichever is greater, with water
vapor @ ≥82°C.
EQP Model: ±0.25 LFL-meters or ±15.2% of applied gas concentration, whichever is greater, @ –55°C.
RESPONSE TIME
4-20 mA Model
T50: 1.2 seconds (2.5 LFL-meters applied)
T90: 2.5 seconds (2.5 LFL-meters applied).
EQP Model
T90: 5.3 seconds* (2.5 LFL-meters applied).
* For EQP model only, average of three consecutive trials, with the minimum and maximum response times no
greater than ±2 seconds from the average indicated response time.
ALIGNMENT
Misalignment will cause the manufacturer stated accuracy limits to increase, but remain within the limits of
IEC 60079-29-4.
11.3
WARNING
D-2 95-8556