Det-Tronics PIRVOLLT Volumetric Infrared Hydrocarbon Gas Process Monitor for Light Hydrocarbons User Manual

Page 3

APPLICATION

PIRVOLLT is a point-type infrared hydrocarbon gas

process monitor. It provides a continuous 4-20 milliampere

(mA) output signal that is proportional to methane vapor

concentrations from 0 to 100% by volume.

PIRVOLLT is designed for use in extractive vapor

sampling systems where the vapor concentration is likely

to be above the lower flammability limit (LFL). Typical

applications for the PIRVOLLT include hydrocarbon well

logging and petroleum exploration where a volumetric

measurement of the target gas is required.

PIRVOLLT is furnished with a sealed aluminum or stainless

steel vapor sampling enclosure. Brass compression-

type tubing fittings on the enclosure (for use with 0.25

inch o.d. tubing) allow easy connection to the inlet and

exhaust lines of the vapor sample extraction system.

PIRVOLLT is CSA certified for use in Class I, Division 1,

Groups B, C and D; and Class I, Division 2, Groups A, B,

C and D areas.

FEATURES

• Routine calibration not required.
• Continuous self-test automatically indicates a fault or

fouled optics condition.

• Performs well in the presence of high concentrations

or constant background levels of hydrocarbons and

in oxygen depleted atmospheres.

• There are no known poisons, e.g. silicones or

hydrides, that compromise the integrity of the

measurement.

SPECIFICATIONS

INPUT VOLTAGE—

24 Vdc nominal. Operating range is 18 to 32 Vdc including

ripple.

POWER CONSUMPTION (Watts)—
Input Voltage:

18 Vdc

24 Vdc

32 Vdc

Nominal 3.5 4.6 6.2

Maximum 4.0 5.5 7.0

DETECTION RANGE—

0 to 100% by volume methane.

DETECTABLE GASES—

PIRVOLLT responds to most hydrocarbon gases,

however, the signal processing program is only accurate

for methane.

ACCURACY—

(Det-Tronics verified)

±2% v/v from 0 to 10% v/v

±3.5% v/v from 10 to 50% v/v

±6% v/v from 50 to 90% v/v

±7% v/v from 90 to 100% v/v.

3 .1

Rev: 1/12 95-8631

INSTRUCTIONS

Volumetric Infrared Hydrocarbon

Gas Process Monitor

for Light Hydrocarbons

PIRVOLLT