Alicat V Series Volumetric Flow Meter User Manual

Page 7

Thank you for purchasing an M or V Series Gas Flow Meter. Please take the time to find and read the

information contained in this manual. This will help to ensure that you get the best possible service from

your instrument. This manual covers the following Alicat Scientific instruments:

M Series 16 Bit Mass Gas Flow Meters

M-XXSCCM-D

M-XXSLPM-D

V Series 16 Bit Volumetric Gas Flow Meters V-XXCCM-D

V-XXLPM-D

Alicat Portable Gas Flow Meters

(

Note: All Alicat Portable Gas Flow Meters operate in acccordance with the instructions found

in this manual. Please see page 39 for information regarding battery replacement.)

Installation

Plumbing

All M and V Series Gas Flow Meters are equipped with female inlet and outlet port connections. Because

the flow meters set up a laminar flow condition within the flow body, no straight runs of pipe are required

upstream or downstream of the meter. The inlet and outlet ports are equal in size and symmetric

(in-line). The port sizes (process connections) and mechanical dimensions for different flow ranges are

shown on pages 31-34.

Meters with M5 (10-32) ports have o-ring face seals and require no further sealant or tape. On

other meters, avoid the use of pipe dopes or sealants on the ports as these compounds can cause

permanent damage to the meter should they get into the flow stream. Use of thread sealing Teflon tape

is recommended to prevent leakage around the threads. When applying the tape, avoid wrapping the

first thread or two to minimize the possibility of getting a piece of shredded tape into the flow stream.

When changing fittings, always clean any tape or debris from the port threads.

It is also recommended that a 20 micron filter be installed upstream of meters with full scale ranges

of 1(S)LPM or less and a 50 micron filter be installed upstream of meters with full scale ranges above

1(S)LPM.

Mounting

All M and V Series Gas Flow Meters have mounting holes for convenient mounting to flat panels. These

meters are position insensitive and can be mounted in any orientation. The sizes and dimensions for

the mounting holes are shown on pages 35-37.

Application

Maximum operating line pressure is 145 PSIG (1 MPa).

Caution: Exceeding the maximum specified line pressure may cause permanent damage to the

solid-state differential pressure transducer.

If the line pressure is higher than 145 PSIG (1 MPa), a pressure regulator should be used upstream

from the flow meter to reduce the pressure to 145 PSIG (1 MPa) or less if possible. Although the meter’s

operation is uni-directional, reversing the flow direction will inflict no damage as long as the maximum

specified limits are not exceeded.

Note: Avoid installations (such as snap acting solenoid valves upstream) that apply instantaneous

high pressure to the meter as permanent damage to the differential pressure sensor could result.

This damage is not covered under warranty!