Sage SIP, SRP, Prime SIP Series, Prime SRP Series Operation And Instruction Manual

SAGE THERMAL GAS MASS FLOW METER

Operations and

Instruction Manual

For Prime Models SIP and SRP

DOCUMENT NUMBER 100-0065

REVISION 16 - SIP/SRP (SAGE PRIME™)

Make the Wise Choice.

Choose Sage Flow Meters.

SAGE METERING, INC.

8 Harris Court, D1

Monterey, CA 93940

1-866-677-SAGE (7243)

Tel [phone]

Fax [phone]

www.sagemetering.com

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

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S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Table of Contents

Introduction Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SECTION A Unpacking Your Sage Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

G

etting Started

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation and Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Locating Proper Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Insertion Flow Meter Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Sage Valve Assembly Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Compression Fitting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Captive Flow Conditioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Probe Insertion Guideline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Installation Depth Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Large Duct or Stack Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

In-line Flow Meter Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Terminal Hookup Prime Integral (Series SIP) . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

24 VDC Prime Integral Terminals Series SIP . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

AC Powered Prime and DC Powered Prime PLUS

Integral Terminals (Series SIP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Terminal Hookup Prime Remote (Series SRP). . . . . . . . . . . . . . . . . . . . . . . . . . . 21

24 VDC Prime Remote Terminals (Series SRP) . . . . . . . . . . . . . . . . . . . . . . . . . . 22

AC Powered Prime and DC Powered Prime PLUS

Remote Series Terminals (Series SRP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Junction Box Wiring Terminals for Remote Style Meters . . . . . . . . . . . . . . . . . 24

SECTION B Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Specifications

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Sage PRIME Styles & Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Sage PRIME Organic (OLED) Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

SECTION C SIP Series Integral Style Flow Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Drawings

SRP Series Remote Style Flow Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Remote Bracket Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Mounting Hardware:

SVA05 Series Isolation Valve Assembly for Insertion Meters . . . . . . . . . . . . 38

STCF Series Teflon Ferrule Compression Fitting . . . . . . . . . . . . . . . . . . . . . . 38

SVA05 Series Isolation Valve Assembly Detail . . . . . . . . . . . . . . . . . . . . . . . . 38

Mounting Plate for Thin Walled Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

continued on next page

S A G E M E T E R I N G , I N C .

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REV. 16-SIP/SRP

SECTION C SVA05LP Low Pressure Isolation Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . 39

Drawings

In-Line and Insertion Flanges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

SECTION D Common Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Diagnostics

In-Situ Calibration Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

SECTION E Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Warranties and Service Work

Cancellation/Return Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Returning Your Sage Flow Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Return Material Authorization Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

SECTION F Modbus Register Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Modbus

Modbus Protocol & Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Sage Register Output Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Sage Addresser Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Sage Addresser Typical Printout (Version 3.14) . . . . . . . . . . . . . . . . . . . . . . . . . 62

SECTION G Sage Prime™ Field Programmable “Dongle” . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Appendix

Correction Factors For Varying Gas Mixes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Installations Where Pipe Condensation May Develop . . . . . . . . . . . . . . . . . . . 66

J-Box and Upstream Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

What Is a Thermal Mass Flow Meter? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

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Welcome

We are pleased that you have purchased a Sage Metering Mass Flow Meter for your
requirement. We hope that you are satisfied with the performance, operation and
design of our highly precise, NIST traceable Thermal Gas Mass Flow Meter.

S

age Metering is your source for monitoring, measuring and controlling the gas mass
flow in your industrial process, building management system or environmental appli ­cation. Our high performance, NIST Traceable,Thermal Mass Flow Meters will help
increase productivity, reduce energy costs, maximize product yields, and/ or help reduce
environmental insult. Sage provides high quality In-Line and Insertion Thermal Mass
Flow Meters for a wide variety of industrial, commercial, and environmental monitoring
needs, including carbon credit verification for Greenhouse Gas reduction.

Sage Meters measure mass flow directly — there is no need for ancillary instrumentation
such as temperature or pressure transmitters. Furthermore, our instruments have excep­tional signal sensitivity, have no moving parts, require little if any maintenance, have
negligible pressure drop and have a turndown up to 100 to 1, and resolve as much as
1000 to 1. Sage Flow Meters can measure the mass flow rate and consumption of air,
oxygen, natural gas, nitrogen, digester gas, biogas, flare gas, hydrogen, argon, carbon
dioxide and other gases and gas mixes.

Sage Prime is the latest addition to our family of high performance Thermal Mass Flow
Meters. It features a bright graphical display of Flow Rate,Total and Temperature, robust
industrial enclosure, and easy to access power and output terminals. Sage Prime has a
dual-compartment windowed enclosure featuring a very high contrast photo-emissive
OLED display with a new photocell activated Screen Saver. The rear compartment,
which is separated from the electronics, has large, easy to access and well marked ter ­minals, for ease of customer wiring. It is powered by 24 VDC (12 VDC optional, or
115/230 VAC). The power dissipation is under 2.5 watts (e.g. under 100 ma at 24 VDC
for the DC version.)

Please let us know if we can assist you in any way with your Sage Meter, or if you
have any questions about its installation, operation, or features. Simply phone us at
866-677-SAGE (7243), or visit our website at www.sagemetering.com to contact a
factory representative in your area. (To access this manual on the website, enter in
user name: sage; passcode 7243737 when prompted.)

Sincerely,

Robert Steinberg

President

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Section

GETTING STARTED

A

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UNPACKING YOUR SAGE METER

Your Sage flow meter is a sensitive, yet rugged,

p

recision built electronic instrument. Upon delivery,

care should be taken when opening the shipping

container and removing your meter. The meter

should be inspected for any damage that may have

occurred during transit. If damage is found, please

contact the carrier immediately to place a claim for

damaged goods. The contents of the container

should be checked against the packing list for any

discrepancies. If there are any questions as to the

contents or configuration of the equipment includ-

ing calibration ranges, or, mounting hardware,

contact Sage Metering as soon as possible. Please

save shipping container and packaging materials

(including PVC tube probe protector on Sage

Insertion Flow Meters) in case the unit needs to

be returned for any reason.

MAINTENANCE

Sage thermal mass flow meters essentially require

little or no maintenance. While the sensing element

is somewhat resistant to dirt and particulate build

up, it may become necessary to clean it from time to

time if mounted in extremely dirty environments.

NOTE: ALWAYS REMOVE THE POWER PRIOR TO

ANY CLEANING OR MAINTENANCE. A detergent or

appropriate non-corrosive solvent for removing the

buildup may be required. A soft brush can be used

to gently clean the sensing element’s surface, using

caution to avoid damaging the sensor elements

(the RTDs). If any disassembly is necessary, contact

Sage Metering, Inc. for instructions. In general, it is

recommended that your Sage Thermal Mass Flow

Meter be returned to the factory if cleaning,

repair, or recalibration is needed. This is usually

the most cost-effective and reliable alternative.

CALIBRATION

Sage Prime has continuous diag nostics. The raw

cali bration milliwats (mw) is always displayed in the

upper left hand corner of the meter's display. At any

time, you can check this reading at a “no flow” con-

dition and compare the reading to the original re -

ported “zero flow” value noted on the last few lines

of your meter’s Certificate of Conformance or the

flow meter’s data tag. This diagnostic procedure not

only checks the sensor performance and the “live

zero” calibration point, but it verifies that the sensor

is clean. It essentially provides a means to validate

the meter’s performance, verifies that there is no shift

or drift, and eliminates the need for annual factory

calibrations. This simple field diagnostic procedure

also verifies that the sensor is free from contamina-

tion, even without inspection. See “In-Situ

Calibration Check” on page 46.

Getting Started

9

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

a

CAUTION cable glands shipped with unit are for shipping purposes only.

Remove shipping cable glands before installing.

a

CAUTION If installing in a Class I hazardous location the installation

must comply with appropriate electrical codes.

a

CAUTION Installer must supply proper ground and bond wire for the

transmitter and the sensor per appropriate electrical codes

S A G E M E T E R I N G , I N C .

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INSTALLATION AND MOUNTING

■

Check the Certificate of Conformance included

with your Sage Thermal Mass Flow Meter for

system pressure, temperature, gas composition,

power input, and signal output.

■

It is recommended that the flow meter be inserted in

a location of maximum straight run. It is suggested

that there be a minimum of 15 pipe diameters of

straight run upstream, and 5 diameters downstream,

depending on the conditions. See chart on page 11.

Note, obstructions such as valves, blowers, expand -

ers and PVC and HDPE pipes will require addition-

al straight run (contact factory for assistance).

■

Check the orientation1: Standard calibration flow

direction is left to right when facing the flow

meter. Gas flow direction is marked with an arrow

on in-line flow meters; UPSTREAM is marked on

insertion probes.

■

Do not rotate probe1, or errors may occur. If enclo-

sure is facing incorrectly, rotate the enclosure 180˚,

but do not rotate the probe. The UPSTREAM mark

still needs to be facing Upstream.

■

Hook up the system per the wiring diagram provid-

ed with your Sage flow meter (see inside of rear

compartment cover for terminal designation).

Double check that wiring for the proper power and

signal connections are correct.

■

Check that all plumbing and electrical hook-ups

are in accordance with OSHA, NFPA, and all other

safety requirements.

■

For Remote Style Meters (SRP) be sure the Remote

Electronics is matched with the Transmitter’s

Junction Box and its attached Probe or Flow

Body. There will be Metal Serial Number Tags

on both the Transmitter as well as the Remote

Electronics enclosure. Do not mismatch the seri-

al numbers of the Remote Electronics and the

Junction Box, or calibration errors will occur.

LOCATING PROPER WIRING DIAGRAM

1) Look at the sticker on your meter. The first three

digits describe the basic model that you have.

Refer to the appropriate page numbers below for

your wiring diagram

2) SIP: see page 19

3) SRP: see page 22 for input/output terminals;

see page 24 (Junction Box Wiring Terminals

for Remote Style Meters)

WIRING

Follow the instructions below to remove the rear cap

for wiring. CAUTION: Do not open the display side!

Before removing the rear cap to access the wiring

terminals it is essential to completely remove the

screw assembly on the side of the rear enclosure to

free up the threads so the lid can be removed. Note

there is a Red Tag attached to the screw assembly

stating “Remove Screw Before Opening Lid”.

After the wiring is completed (see pages 18 to 23

for wiring details), please close the lid, and reinsert

the screw assembly in the same manner.

Note: See “Approvals” page for Hazardous Location

Approvals (DC Powered Meters Only)

REV. 16-SIP/SRP

1 The Integral Style of Sage Prime Insertion Meters have the Display oriented as shown on page 14.

If an alternate orientation of the display, or enclosure is required (ie. installation into a vertical pipe),
please furnish a sketch or drawing, and specify “ROTATE” on purchase order. However, if it is later
determined that the enclosure needs to be rotated, that procedure can be done in the field. However,
if the display needs to be rotated, then the meter must be sent back to Sage to be modified. Do not
attempt this in the field. An RMA will be required prior to returning the meter (see page 51). The
procedure for rotating the enclosure is as follows: Clamp the enclosure of the Prime in a vise with the
probe pointing up to the ceiling. Then take a 7/8 wrench and turn the probe to the proper orienta­tion. Lock the probe into its new position with a set screw (not provided).

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S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

FLOW PROFILE AND INSTALLATION

CONSIDERATIONS

Insertion Flow Meters, although generally easier to

install that In-Line Flow Meters, require proper

installation, and a well developed flow profile, in

order to perform properly. Please refer to the section

on the following pages titled PROBE INSERTION

GUIDELINE DRAWING (page 14) and INSTALLA-

TION DEPTH CHART (page 15).

SAGE VALVE ASSEMBLY OPERATION

Valve assemblies (SVA05 and SVA05LP) are an op -

tional mounting hardware for Insertion Style Flow

Meters (see pages 38 and 39). They allow the removal

of insertion-style meters for service, cleaning, recali -

bration, relocation, etc. without the need to “shut-

down” your process. The probe insertion depth is

adjustable to permit sensor to be located at center

to optimize measurement accuracy. (Refer to PROBE

IN SERTION GUIDE LINE DRAWING and CHART, pages

14 & 15.) The ball valve will seal off leaks of the

process gas at the point of insertion after the probe

assembly has been removed. The assembly includes

a valve, threadolet, compression fitting with Teflon

ferrule, a cable restraint, and two collar clamps.

A threaded half coupling (3/4" FNPT) properly sized

to accom modate the isolation valve retractor assem-

bly must be fitted to the pipe/duct to which the

insertion probe will be inserted. Avoid T-Fittings

since they will disturb the flow profile, and effec-

tively reduce the measurement area. Direct thread-

ing together (or with necessary bushings) of the

retractor assembly may be required. In other cases,

the threadolet must be welded in place and a clear-

ance hole must be drilled through the pipe/ duct to

accept the probe assembly. If the pipe/duct is under

pressure during installation, a hot tap drill (not

available through Sage Metering) may be required.

FLOW CONDITIONING AND STRAIGHT RUN

Although a minimum of 15 pipe diameters of

upstream straight run is commonly recommended,

to absolutely assure that the flow profile is well

developed at the point of measurement, either use

Flow Conditioners (standard in Sage In-Line Flow

Meters, 1/2" and larger, and also available as assem-

blies for Insertion Flow Meters, see page 13), or

consider additional straight run. The Chart below

provides examples of the amount of straight run

that would virtually assure that there are no flow

disturbances at the point of measurement.

N O T E :
Detailed
Drawings
are shown
on pages
38 & 39.

Insertion Flow Meter Application

IMPO RTANCE OF FLO W CO NDITION ING

Reco mmen ded P ipe D iameter s Ups tream

One 90˚ Elbow

Two 90˚ Elbows

in the same plane

Two 90˚ Elbows

in different planes

4:1 Area Reduction

4:1 Area Expansion

Multiple Disturbance

3

5

9

3

10

TBD

1

This column applies to In-Line Flow Meters, which come standard with built-in Flow Conditioners, as well as Insertion Meters,
when provided with upstream Captive Flow Conditioners (see page 13).

D I S T U R B A N C E

15

20

At least 40

15

At least 30

To Be Determined

WITHOUT

FLOW CONDITIONING

Minimum Industry
Recommendation

WITH FLOW

CONDITIONING

1

Sage

Recommendation

S A G E M E T E R I N G , I N C .

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REV. 16-SIP/SRP

COMPRESSION FITTING OPERATION

A bored through tube fitting, properly sized to

accommodate an insertion probe’s particular OD,

can be provided by the user or purchased as an

option from Sage Metering (see page 38). Prior to

installation, a clearance hole to accommodate the

insertion probe assembly must be drilled in the

pipe/duct. A fitting (1/2" FNPT) is then welded in

place or threaded into the half-threadolet which has

been welded to the pipe/duct. The probe insertion

depth is adjustable to permit sensor to be located at

center, to optimize measurement accuracy. (Refer to

PROBE INSERTION GUIDELINE DRAWING and

CHART, pages 14 & 15.)

Insert the probe shaft tubing into the
compression fitting to the position indicated
in the Probe Insertion guidelines.

While holding the fitting body steady,
tighten the nut one and one-quar ter
turns to the 9 o’clock position.

INSTALLATION INSTRUCTIONS

1. Insert tubing into the tube fitting.

2. Make sure that the tubing is positioned properly

per the PROBE INSERTION GUIDELINE DRAW-

ING AND CHART, pages 14 & 15.

3. Due to the variations of tubing diameters, a

common starting point is desirable. Therefore,

tighten the nut until the tubing will not turn

by hand or move axially in the fitting.

4. Scribe the nut at the 6 o’clock position.

5. While holding fitting body steady, tighten the nut

1

1

⁄4 turns to the 9 o’clock position.

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S A G E M E T E R I N G , I N C .

ANSI Class Flanges
(user supplied)

Largest of the
Two Perforated
Plates

Flow Conditioning
Assembly is
inserted here.

One Pipe
Diameter

FLOW

Gaskets

One Pipe

Diameter

Straight Run Requirement

from this Flange

CAPTIVE FLOW CONDITIONERS
Can Be Installed in Conjunction with Insertion Style Flow Meters

NOTE: The larger of the two perforated plates of the Sage
Flow Conditioning assembly is positioned between two flanges
and two gaskets as shown. The smaller of the two perforated
plates of the conditioner will freely slide into the application
pipe, facing downstream. The probe mounting hardware will be
placed one diameter downstream of the downstream plate.
Probe location must be one pipe ID diameter downstream of
Flow Conditioners or errors will occur.

Front View of one of the Conditioning Plates

IMPORTANT The location of the probe must be exactly one pipe ID diameter (i.e., 4” in a 4” pipe; 6” in
a 6” pipe, etc.) downstream of the Captive Flow Conditioning assembly. The Captive Flow Conditioners
are always designed to be separated by one pipe diameter. See drawing below. The probe location must
be one pipe ID diameter downstream of Flow Conditioner, or errors will occur.

Note: See table on page 11
(last Column) for Straight Run
Requirement

S A G E M E T E R I N G , I N C .

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REV. 16-SIP/SRP

PROBE INSERTION GUIDELINE DRAWING

1

Choose the longest straight-run section of pipe avail-

able to allow a uniform, well-developed flow profile.

A

llow for a minimum of 15 pipe diameters of straight

run upstream, and 5 diameters downstream, depend-

ing on the conditions. See chart on page 11. Note,

obstructions such as valves, blowers expanders and

PVC and HDPE pipes will require additional straight

run (contact factory for assistance). Avoid, if possible,

installations immediately downstream of bends, fans,

nozzles, heaters and especially valves, or anything

else installed in the line that may cause nonuniform

flow profiles and swirls. Otherwise signal output

errors could result, unless significantly more straight

run is provided, or in the absence of sufficient straight

run, Flow Conditioners (page 13) are in stalled (con-

tact Sage for assistance if needed). Refer to page 13 to

see the benefits of incorporating Flow Conditioners.

Insertion styles are available through Sage Metering,

Inc. with a standard 1/2" OD probe support assem-

bly; 3/4" is also available. Stan dard probe lengths

are 6", 12", 15", 18", 24", 30", 36" and 48". A common

method of mounting the probe assembly through

a pipe wall or duct (if ambient air) is with a compres-

sion fitting (STCF05). A Sage valve assembly (SVA05)

is useful and highly recommended for

pressurized applications or other gases,

such as Natural Gas. Flange mounting

is optionally available.

Sage insertion style flow meters can be assembled

and calibrated for use in virtually any size pipe or

duct (as small as 1”). Sage insertion flow meters

include a probe assembly that supports the sensing

element (a self-heated flow sensor and a tempera -

ture/reference sensor); a sensor drive circuit; micro -

pro cessor meter board, and trans mitter enclosure.

The probe assembly must be inserted into the correct

position in the pro cess gas flow conduit to allow the

gas to flow through the sensor “window” across the

sensor element. The “sensing point” or active part of

the sensor (0.5" from the end of the probe) should be

positioned as per the drawing below and the

Installation Depth Chart on page 15.

Installation Depth

The center of the pipe (assuming a well developed

turbulent flow profile) is fairly flat, and easy to

locate. See “Installation Depth Chart” on next page

to determine proper insertion depth.

Z

Y

X

4" PIPE SHOWN

LESS THAN IDEAL LOCATION
Contact Factory for Assistance

GOOD LOCATION

2,3

(See Installation Depth Chart for X and Y Dimension)

2. Probe should be inserted per Installation Depth Chart (see following page),
so sensors are in the center of the pipe.

3. The portion of the probe that remains outside of the pipe, is simply the factory
ordered probe length (i.e. “-15” = 15 inches) minus the “Y” dimension.

Center
of Pipe

PRIME

84˚F

1

3546

SCFM

4

67469670

SCF

88mW

1. SIP Industrial Meter shown in drawing. Note, probe is not bi-directional.

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S A G E M E T E R I N G , I N C .

I

NSTALLATION DEPTH CHART

Methods for Probe Insertion to Pipe Center

ME TH OD 1

Using charts below, select pipe size (column 1),

determine X. Insert probe until the end touches the

bottom of the pipe (ID), mark probe as it exits top

of fitting. Lift probe distance “X” and tighten com -

pression fitting.

ME TH OD 2

Using charts below1, select pipe size (column 1),

determine Y. Subtract Y from the factory supplied

probe length. That difference Z (see drawing on page

14) should be outside of the pipe, and is measured

from the bottom of the enclosure of the probe weld

to pipe OD.

PIPE SIZE OD ID XYPIPE AREA

1"

1.5" 1.900 1.500 .15" 1.56" 0.0123

2" 2.375 1.939 .35" 1.82" 0.0205

2.5" 2.875 2.323 .55" 2.07" 0.0294

3" 3.500 2.900 .80" 2.38" 0.0459

4" 4.500 3.826 1.30" 2.86" 0.0798

6" 6.625 5.761 2.25" 3.95" 0.1810

8" 8.625 7.625 3.25" 4.90" 0.3171

10" 10.750 9.750 4.25" 6.00" 0.5185

12" 12.750 11.374 5.13" 7.00" 0.7056

14" 14.000 12.500 5.70" 7.50" 0.8522

16" 16.000 14.312 6.60" 8.60" 1.1172

18" 18.000 16.124 7.50" 9.60" 1.4180

24" 24.000 21.562 10.25" 12.60" 2.5357

S C H E D U L E 4 0 P I P E

2

S C H E D U L E 8 0 P I P E

2

PIPE SIZE OD ID XYPIPE AREA

1"

1.5" 1.900 1.610 .20" 1.56" 0.0141

2" 2.375 2.067 .40" 1.82" 0.0233

2.5" 2.875 2.469 .60" 2.07" 0.0332

3" 3.500 3.068 .90" 2.38" 0.0513

4" 4.500 4.026 1.40" 2.86" 0.0884

6" 6.625 6.065 2.40" 3.95" 0.2006

8" 8.625 7.981 3.40" 4.90" 0.3474

10" 10.750 10.020 4.40" 6.00" 0.5476

12" 12.750 11.938 5.50" 7.00" 0.7773

14" 14.000 13.124 6.00" 7.50" 0.9394

16" 16.000 15.000 7.00" 8.60" 1.2272

18" 18.000 16.876 8.00" 9.60" 1.5533

24" 24.000 22.625 10.75" 12.60" 2.7919

C O N S U L T F A C T O R Y

C O N S U L T F A C T O R Y

1

For other Pipe Schedules, such as Schedule 10, contact Sage, however the Y dimension will

be the same for any Schedule Pipe

2

The 1" Pipe Size needs to have the Probe “Bottomed Out” (option “BOT"); the calibration
method for the 1

1

⁄2" Pipe is either as shown below, or with option “BOT”

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

16

REV. 16-SIP/SRP

P

RIME

84˚F

1

3546

SCFM

467469670

SCF

88mW

P

RIME

8

4

˚

F

13546 SCFM

4

67469670

SCF

88mW

PRIME

84˚F

13546 SCFM

467469670

SCF

88mW

PRIME

8

4

˚

F

1

3546

S

CFM

4

67469670

S

CF

8

8mW

CONFIGURATION FOR UTILIZING FOUR (4) SAGE INSERTION MASS FLOW METERS FOR LARGE ROUND
PIPES OR DUCTS LARGER THAN 36" TO MINIMIZE EFFECTS OF VARYING FLOW PROFILES
(It is recommended that Factory be contacted to assist with applications of this nature)

The outputs of the four meters will be averaged
by customer’s PLC or other method to improve
overall accuracy in measuring the flow rate.
(For medium sized round pipes [18" to 36"],
two meters, on the opposite side of the same
diameter, may be sufficient [insert parallel to an
upstream 90 degree bend for optimal benefit.])
Note, in this configuration, each sensor needs
to be averaged.

1/2" NPT
User Entry
for Wiring

1/2" NPT
User Entry
for Wiring

3/4" NPT for

Probe Support

3/4" NPT for

Remote Cable

3/4" NPT for

Remote Cable

Large Duct or Stack Applications

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

17

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

IN-LINE FLOW METERS

In-line mounting styles are available through Sage

Metering, Inc. in sizes from 1/4" pipe through 4"

pipe. Threaded male NPT ends are standard up to

2-1/2"; ANSI 150lb flanged ends are recommended

for 3" and 4" models. Contact the factory if optional

end mounting styles are required. Pipe sizes in excess

of 4" require the insertion style mass flow meter.

The in-line style flow meter assembly flow section is

typically specified to match the user’s flow conduit

and is plumbed directly in the flow line by thread-

LENGTH “L” SAME AS NON-FLANGED METER
(See table on page 27. For example, 1"x8" flow
body has an 8" length. The length will be the same
whether an NPT flow body, or whether flanged.
If a flanged flow body, the 8" dimension will be
a Face-to-Face dimension.)

FLOW CONDITIONING SCREENS FOR IN-LINE FLOW BODIES 1/2" AND UP

1

Screens shown
with NPT fitting.

1 Note, Flow conditioning is also available for Insertion Meter applications (see page 13)

ing, flanging, welding, etc. DO NOT USE REDUCERS.

It includes the sensing element (a self-heated flow

sensor and a temperature/reference sensor) mounted

directly in the specified flow section for exposure to

the process gas; a sensor drive circuit; microprocessor

meter board, and transmitter enclosure.

All in-line Flow Meters, 1/2" and up have built-in

Flow Conditioners. See Table (page 10) for Upstream

Straight run requirements. Note, the 1/4" and 3/8"

do not have Flow Conditioners and thus require

more straight run.

In-Line Flow Meter Application

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

18

REV. 16-SIP/SRP

Prime Integral (Series SIP)

SEE “WIRING” ON PAGE 10 FOR INSTRUCTIONS ON HOW TO REMOVE REAR LID;
SEE FOLLOWING PAGES FOR TERMINAL HOOKUP

1 RED AC1 COM 1

2

S1 AC2 B + 2

3

RED SPARE A – 3

4

WHITE

4-20mA PWR

4

5

S2 4-20mA 5

6

WHITE VDC GND 6

A B C

24 VDC
P

ULSE

VDC IN

+

VDC GND

–

INTEGRAL

INSIDE COVER VIEW INSIDE BODY VIEW

1/2" NPT

User Entry

for Wiring

3/4" NPT for

Probe Support

NO CUSTOMER ACCESS
DO NOT OPEN THIS SIDE

DISPLAY SIDE

1/2" NPT

View Entry

(ONE ON EACH SIDE)

FLOW

TERMINAL BLOCK SIDE

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

19

S A G E M E T E R I N G , I N C .

24 VDC Prime Integral Terminals (Series SIP)

(APPROVED FOR HAZARDOUS SERVICE6)

1 RED AC1 COM 1

2

S1 AC2 B +

2

3

RED SPARE A –

3

4 WHITE

4-20mA PWR

4

5

S2 4-20mA 5

6

WHITE VDC GND

6

A B C

2

4 VDC

PULSE

VDC IN

+

VDC GND

–

I

NTEGRAL

INSIDE COVER VIEW

NOTE: The Sage Prime
draws 2.4 watts maximum
(i.e. ≅ 100ma @24VDC)

–

+

C

U STO ME R

R ET UR N

E

X TE RN AL LY P OW ER ED

4 –2 0 mA BY C US TO ME R

+

*

DESCRIPTION TERMINALS NOTES

DC Input Power: B5 B6
24 VDC

7,8

+ VDC – VDC GND

Internally Powered: C5 C6 Do not remove
4-20 mA

4-20 mA Return

any Jumpers

SIGNAL DRIVE

Internally Powered: C4 C6 Do not remove
Pulsed Output

GND

any Jumpers

Externally Powered: C5 B4 Remove B4 & B5
4-20 mA

4-20 mA 4-20 mA

Jumper

SIGNAL DRIVE EX TERNAL SOURCE

Externally Powered9: C4 B3 Remove B4 & B5
Pulsed Output

JUNCTION FOR

Jumper and Connect

PULSE RETURN C4 Resistive Jumper

to B3

MODBUS C2 C3 C1 Modbus Ground

10

RS485(+) RS485(–) MODBUS GROUND

(REQ’D)

*B4 and B5 JUMPER
Remove jumper for Externally Sourced 4-20
mA. In this mode, user supplies 9-27 Volts to
externally power the 4-20 mA loop, and the
4-20 mA loop becomes optically isolated.

1 Specify the Sage Prime PLUS option in order to have the Modbus Ground (Terminal C1, COM) isolated

from the 24 VDC Sage Power Supply Ground (Terminal B6). All other features of Prime PLUS are
identical to the standard Sage Prime, except other voltage available. (See footnote 8)

2 It is important to connect the Ground when using Modbus communications, or ground loop problems

may develop. Improper wiring can also damage internal circuitry

3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output

is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a
12 VDC Pulse)

4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using Sage Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff

can be entered into the FLOW MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and
the 4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of
10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the
output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the
4 mA will always be zero based

6 Class I, Div 2, Groups B,C,D,T4 and ATEX Ex na IIC T4
7 24 VDC ±10%
8 Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on Prime PLUS. Contact Sage
9 Assumes the 4-20 mA is Externally Powered

10 Modbus Ground becomes isolated from the B6 Power Supply Ground only on Prime PLUS version

(specify “PLUS”)

INSIDE BODY VIEW

1/2" NPT

User Entry

for Wiring

3/4" NPT for

Remote Cable

(on Remote Style SRP)

**

**Note, Flow Meter is supplied with a 10K
(1/2 watt) metal film resistor (Resistive
Jumper) connected across Terminals C4 and
C6. For externally powered operation, in
addition to removing B4 & B5 Jumpers, it
is necessary to connect C4 Resistive Jumper
to Terminal B3 instead of C6. Note, B3 must
be connected to the External Sources com­mon in order to enable the optically isolated
pulse output. In this mode, Pulse Output is
optically isolated. Pulsed Output voltage will
depend on customer source voltage. Use
Sage Resistive Jumper only!

**

A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – NO WIRE
A3 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMPERATURE SENSOR WIRE
A5 – NO WIRE
A6 – WHITE – TEMPERATURE SENSOR WIRE

B3 – JUNCTION FOR ISOLATED PULSE
B4 – 4-20 mA RETURN (–) AND PULSE SOURCE
B5 – VDC IN – VOLTAGE DC – POSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)

1

C1 – COM – RS485 MODBUS GROUND

1,2

C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC PULSE – 0 TO 24 VDC PULSE OUTPUT

3,4

C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE

5

C6 – VDC GND – VOLTAGE DC – GROUND (–)

24

O

24

O

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

20

AC Powered Prime Integral Terminals (Series SIP)

6

1 RED AC1 COM 1

2

S1 AC2 B +

2

3

RED SPARE A –

3

4 WHITE

4-20mA PWR

4

5

S2 4-20mA 5

6

WHITE VDC GND

6

A B C

2

4 VDC

PULSE

VDC IN

+

VDC GND

–

I

NTEGRAL

INSIDE COVER VIEW

NOTE: The Sage Prime
draws 2.4 watts maximum
(i.e. ≅ 100ma @24VDC)

–

+

C US TO ME R

R ET UR N

E

X TE RN AL LY P OW ER ED

4

– 20 m A B Y CU ST OM ER

+

*B4 and B5 JUMPER
Remove jumper for Externally Sourced 4-20
mA. In this mode, user supplies 9-27 Volts to
externally power the 4-20 mA loop, and the
4-20 mA loop becomes optically isolated.

1 Specify the Sage Prime PLUS option in order to have the Modbus Ground (Terminal C1, COM) isolated

from the 24 VDC Sage Power Supply Ground (Terminal B6). All other features of Prime PLUS are
identical to the standard Sage Prime, except other voltage available. (See footnote 8)

2 It is important to connect the Ground when using Modbus communications, or ground loop problems

may develop. Improper wiring can also damage internal circuitry

3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output

is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a
12 VDC Pulse)

4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using Sage Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff

can be entered into the FLOW MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and
the 4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of
10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the
output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the
4 mA will always be zero based

6 This version does not have Hazard Approvals
7 24 VDC ±10%
8 Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on Prime PLUS. Contact Sage
9 Assumes the 4-20 mA is Externally Powered

10 Modbus Ground becomes isolated from the B6 Power Supply Ground only on Prime PLUS version

(specify “PLUS”)

INSIDE BODY VIEW

1/2" NPT

User Entry

for Wiring

3/4" NPT for

Remote Cable

(ON REMOTE STYLE SRP)

Grounding

Lug

**

**

A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – NO WIRE
A3 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMPERATURE SENSOR WIRE
A5 – NO WIRE
A6 – WHITE – TEMPERATURE SENSOR WIRE

B1 – AC1 – AC VOLTAGE
B2 – AC2 – AC VOLTAGE
B3 – JUNCTION FOR ISOLATED PULSE
B4 – 4-20 mA RETURN (–) AND PULSE SOURCE
B5 – VDC IN – VOLTAGE DC – POSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)

1

C1 – COM – RS485 MODBUS GROUND

1,2

C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC PULSE – 0 TO 24 VDC PULSE OUTPUT

3,4

C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE

5

C6 – VDC GND – VOLTAGE DC – GROUND (–)

24

O

24

O

DESCRIPTION TERMINALS NOTES

AC Input Power: B1 B2 Connect Ground Wire
115 VAC/230 VAC

AC1 AC2

to Grounding Lug

DC Input Power: B5 B6
24 VDC

7,8

+ VDC – VDC GND

Internally Powered: C5 C6 Do not remove
4-20 mA

4-20 mA Return

any Jumpers

SIGNAL DRIVE

Internally Powered: C4 C6 Do not remove
Pulsed Output

GND

any Jumpers

Externally Powered: C5 B4 Remove B4 & B5
4-20 mA

4-20 mA 4-20 mA

Jumper

SIGNAL DRIVE EX TERNAL SOURCE

Externally Powered9: C4 B3 Remove B4 & B5
Pulsed Output

JUNCTION FOR

Jumper and Connect

PULSE RETURN C4 Resistive Jumper

to B3

MODBUS C2 C3 C1 Modbus Ground

10

RS485(+) RS485(–) MODBUS GROUND

(REQ’D)

*

**Note, Flow Meter is supplied with a 10K
(1/2 watt) metal film resistor (Resistive
Jumper) connected across Terminals C4 and
C6. For externally powered operation, in
addition to removing B4 & B5 Jumpers, it
is necessary to connect C4 Resistive Jumper
to Terminal B3 instead of C6. Note, B3 must
be connected to the External Sources com­mon in order to enable the optically isolated
pulse output. In this mode, Pulse Output is
optically isolated. Pulsed Output voltage will
depend on customer source voltage. Use
Sage Resistive Jumper only!

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

21

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Prime Remote (Series SRP)

SEE “WIRING” ON PAGE 10 FOR INSTRUCTIONS ON HOW TO REMOVE REAR LID;
SEE FOLLOWING PAGES FOR TERMINAL HOOKUP

REMOTE

1

RED AC1 COM

1

2

GREEN AC2 B +

2

3

BLUE SPARE A –

3

4

WHITE

4-20mA PWR 24 VDC PULSE

4

5

BLACK VDC IN 4-20mA

5

6

ORANGE VDC GND VDC GND

6

A B C

1

2

3

4

5

6

1

2

3

4

5

6

A B C

INSIDE COVER VIEW INSIDE BODY VIEW

DISPLAY SIDE

1/2" NPT

User Entry

for Wiring

3/4" NPT for

Remote Cable

(ON REMOTE STYLE SRP)

3/4" NPT for

Remote Cable

3/4" NPT for

Probe Support

Junction Box
contains no
electronics,
just terminals

1/2" NPT

User Entry for Wiring

(ONE ON EACH SIDE)

FLOW

TERMINAL

BLOCK SIDE

3/4" NPT for

Remote Cable

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

22

24 VDC Prime Remote Terminals (Series SRP)

(APPROVED FOR HAZARDOUS SERVICE6)

R

EMOTE

1

RED AC1 COM

1

2

GREEN AC2 B +

2

3

B

LUE SPARE A –

3

4

W

HITE 4-20mA PWR

2

4 VDC PULSE

4

5

B

LACK VDC IN 4-20mA

5

6

O

RANGE VDC GND VDC GND

6

A B C

A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – GREEN – SENSE WIRE
A3 – BLUE – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMPERATURE SENSOR WIRE
A5 – BLACK – SENSE WIRE
A6 – ORANGE – TEMPERATURE SENSOR WIRE

B3 – JUNCTION FOR ISOLATED PULSE
B4 – 4-20 mA RETURN (–) AND PULSE SOURCE
B5 – VDC IN – VOLTAGE DC – POSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)

1

C1 – COM – RS485 MODBUS GROUND

1,2

C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC PULSE – 0 TO 24 VDC PULSE OUTPUT

3,4

C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE

5

C6 – VDC GND – VOLTAGE DC – GROUND (–)

INSIDE COVER VIEW

NOTE: The Sage Prime
draws 2.4 watts maximum
(i.e. ≅ 100ma @24VDC)

–

+

C US TO ME R

R ET UR N

E

X TE RN AL LY P OW ER ED

4

– 20 m A B Y CU ST OM ER

+

*

DESCRIPTION TERMINALS NOTES

DC Input Power: B5 B6
24 VDC

7,8

+ VDC – VDC GND

Internally Powered: C5 C6 Do not remove
4-20 mA

4-20 mA Return

any Jumpers

SIGNAL DRIVE

Internally Powered: C4 C6 Do not remove
Pulsed Output

GND

any Jumpers

Externally Powered: C5 B4 Remove B4 & B5
4-20 mA

4-20 mA 4-20 mA

Jumper

SIGNAL DRIVE EX TERNAL SOURCE

Externally Powered9: C4 B3 Remove B4 & B5
Pulsed Output

JUNCTION FOR

Jumpers and Connect

PULSE RETURN C4 Resistive Jumper

to B3

MODBUS C2 C3 C1 Modbus Ground

10

RS485(+) RS485(–) MODBUS GROUND

REQ’D)

*B4 and B5 JUMPER
Remove jumper for Externally Sourced 4-20
mA. In this mode, user supplies 9-27 Volts to
externally power the 4-20 mA loop, and the
4-20 mA loop becomes optically isolated.

1 Specify the Sage Prime PLUS option in order to have the Modbus Ground (Terminal C1, COM) isolated

from the 24 VDC Sage Power Supply Ground (Terminal B6). All other features of Prime PLUS are
identical to the standard Sage Prime, except other voltage available. (See footnote 8)

2 It is important to connect the Ground when using Modbus communications, or ground loop problems

may develop. Improper wiring can also damage internal circuitry

3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output

is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a
12 VDC Pulse)

4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using Sage Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff

can be entered into the FLOW MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and the
4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of
10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the
output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the
4 mA will always be zero based

6 Class I, Div 2, Groups B,C,D,T4 and ATEX Ex na IIC T4
7 24 VDC ±10%
8 Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on Prime PLUS. Contact Sage
9 Assumes the 4-20 mA is Externally Powered

10 Modbus Ground becomes isolated from the B6 Power Supply Ground only on Prime PLUS version

(specify “PLUS”)

INSIDE BODY VIEW

1/2" NPT

User Entry

for Wiring

3/4" NPT for

Remote Cable

(ON REMOTE STYLE SRP)

**

**

24

O

24

O

**Note, Flow Meter is supplied with a 10K
(1/2 watt) metal film resistor (Resistive
Jumper) connected across Terminals C4 and
C6. For externally powered operation, in
addition to removing B4 & B5 Jumpers, it
is necessary to connect C4 Resistive Jumper
to Terminal B3 instead of C6. Note, B3 must
be connected to the External Sources com­mon in order to enable the optically isolated
pulse output. In this mode, Pulse Output is
optically isolated. Pulsed Output voltage will
depend on customer source voltage. Use
Sage Resistive Jumper only!

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

23

S A G E M E T E R I N G , I N C .

AC Powered Prime Remote Terminals (Series SRP)

6

R

EMOTE

1

RED AC1 COM

1

2

GREEN AC2 B +

2

3

B

LUE SPARE A –

3

4

W

HITE 4-20mA PWR

2

4 VDC PULSE

4

5

B

LACK VDC IN 4-20mA

5

6

O

RANGE VDC GND VDC GND

6

A B C

INSIDE COVER VIEW

NOTE: The Sage Prime
draws 2.4 watts maximum
(i.e. ≅ 100ma @24VDC)

–

+

C US TO ME R

R ET UR N

E

X TE RN AL LY P OW ER ED

4 –2 0 mA BY C US TO ME R

+

*

DESCRIPTION TERMINALS NOTES

AC Input Power: B1 B2 Connect Ground Wire
115 VAC/230 VAC

AC1 AC2

to Grounding Lug

DC Input Power: B5 B6
24 VDC

7

,8

+ VDC – VDC GND

Internally Powered: C5 C6 Do not remove
4-20 mA

4-20 mA Return

any Jumpers

SIGNAL DRIVE

Internally Powered: C4 C6 Do not remove
Pulsed Output

GND

any Jumpers

Externally Powered: C5 B4 Remove B4 & B5
4-20 mA

4-20 mA 4-20 mA

Jumper

SIGNAL DRIVE EX TERNAL SOURCE

Externally Powered9: C4 B3 Remove B4 & B5
Pulsed Output

JUNCTION FOR

Jumpers and Connect

PULSE RETURN C4 Resistive Jumper

to B3

MODBUS C2 C3 C1 Modbus Ground

10

RS485(+) RS485(–) MODBUS GROUND

(REQ’D)

*B4 and B5 JUMPER
Remove jumper for Externally Sourced 4-20
mA. In this mode, user supplies 9-27 Volts to
externally power the 4-20 mA loop, and the
4-20 mA loop becomes optically isolated.

1 Specify the Sage Prime PLUS option in order to have the Modbus Ground (Terminal C1, COM) isolated

from the 24 VDC Sage Power Supply Ground (Terminal B6). All other features of Prime PLUS are
identical to the standard Sage Prime, except other voltage available. (See footnote 8)

2 It is important to connect the Ground when using Modbus communications, or ground loop problems

may develop. Improper wiring can also damage internal circuitry

3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output

is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a
12 VDC Pulse)

4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using Sage Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff

can be entered into the FLOW MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and
the 4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of
10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the
output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the
4 mA will always be zero based

6 This version does not have Hazard Approvals
7 24 VDC ±10%
8 Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on Prime PLUS. Contact Sage
9 Assumes the 4-20 mA is Externally Powered

10 Modbus Ground becomes isolated from the B6 Power Supply Ground only on Prime PLUS version

(specify “PLUS”)

1

2

3

4

5

6

1

2

3

4

5

6

A B C

INSIDE BODY VIEW

1/2" NPT

User Entry

for Wiring

3/4" NPT for

Remote Cable

(ON REMOTE STYLE SRP)

Grounding

Lug

**

**

A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – GREEN – SENSE WIRE
A3 – BLUE – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMPERATURE SENSOR WIRE
A5 – BLACK – SENSE WIRE
A6 – ORANGE – TEMPERATURE SENSOR WIRE

B1 – AC1 – AC VOLTAGE
B2 – AC2 – AC VOLTAGE
B3 – JUNCTION FOR ISOLATED PULSE
B4 – 4-20 mA RETURN (–) AND PULSE SOURCE
B5 – VDC IN – VOLTAGE DC – POSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)

1

C1 – COM – RS485 MODBUS GROUND

1,2

C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC PULSE – 0 TO 24 VDC PULSE OUTPUT

3,4

C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE

5

C6 – VDC GND – VOLTAGE DC – GROUND (–)

24

O

24

O

**Note, Flow Meter is supplied with a 10K
(1/2 watt) metal film resistor (Resistive
Jumper) connected across Terminals C4 and
C6. For externally powered operation, in
addition to removing B4 & B5 Jumpers, it
is necessary to connect C4 Resistive Jumper
to Terminal B3 instead of C6. Note, B3 must
be connected to the External Sources com­mon in order to enable the optically isolated
pulse output. In this mode, Pulse Output is
optically isolated. Pulsed Output voltage will
depend on customer source voltage. Use
Sage Resistive Jumper only!

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

24

REV. 16-SIP/SRP

Junction Box Wiring Terminals for Remote Style Meters (Series SRP)

(THERE ARE NO ELECTRONICS INSIDE JUNCTION BOX)

CUSTOMER SIDE

1

(Wired at Installation Site)

FACTORY SIDE

(Wired at Factory)

Red

Red
White

W

hite

Blue

Green

Red

Orange

Black

White

CAUTION: Strip wires 3/8" and
d

o not crimp insulation.

4.37

3/4” FNPT

Conduit Receptacle

Grounding Screw

GROUNDING SCREW NOT USED
(The shield [drain wire] is only connected
on the other end [the electronics end]).

Metal Conduit
is recommended
with appropriate
grounding to
minimize effects
from external
noise sources.

Interconnect Cable

2

To Terminal A1 to A6

(see page 21–23)

SEE THE PREVIOUS PAGE FOR THE OTHER END OF THE REMOTE WIRING HOOKUP (the electronics side).

NOTE: The Sensor Junction Box
will have a serial number tag.
It is important to match this serial
number with the serial number
of the Remote electronics. Mixing
components from different meters
can result in significant errors.

a

CAUTION: Cable and cable glands are not for use in hazardous area

environments. Power, ground, outputs, shielded cable, seal fittings

and conduits are to be supplied by customer.

1 NOTE: There are hidden jumpers (underneath the terminal strip) that short together the Blue

and Green wires, and also short together the Black and Orange wires. These extra wires are part
of the meter's Lead Length Compensation circuitry, allowing the user to change the length of the
interconnect cable (from 0 to 1000 feet) without effecting the accuracy. 25 feet of cable are ini­tially supplied (for cabling longer than 1000 feet, contact Sage).

2 Sage supplies 25 feet of cable for the interconnect wires between the Junction Box and the Remote

Enclosures: Carroll (manufacturer), Part #C0783, 20 gauge, 6 conductor, foil shielded, grey PVC jacket.

Section

STYLES AND FEATURES

B

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

27

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Sage Thermal Mass Flow Meters have two sensors

constructed of reference grade platinum windings

(RTDs). The two RTDs are clad in a protective 316SS

sheath and are driven by a proprietary sensor drive

circuit. One of the sensors is self-heated (flow sen-

sor), and the other sensor (temperature/reference

sensor) measures the gas temperature. The pair is

referred to as the sensing element, and is either

installed in a probe as an Insertion style, or inserted

into a pipe section as an In-Line style flow meter.

As gas flows by the flow sensor, the gas molecules

carry heat away from the surface, and the sensor

cools down as it loses energy. The sensor drive

circuit replenishes the lost energy by heating the

flow sensor until it is a constant temperature differ-

ential above the reference sensor. The electrical

power required to maintain a constant temperature

differential is directly proportional to the gas mass

flow rate and is linearized to be the output signal

of the meter.

Principle of Operation of the Thermal Mass Flow Meter

It is essential that this constant temperature differ -

ential be maintained, even if there are wide fluctua-

tions in gas temperature. It is the function of the

Sage hybrid-digital proprietary sensor drive circuit to

maintain the differential, whether or not the gas

temperature changes, or however quickly molecules

cool off the flow sensor. It is also necessary to proper-

ly calibrate the device with the actual gas (or close

equivalent with certain gases), in the Sage National

Institute of Standards certified (NIST) calibration

facility. By accomplishing these two critical objec-

tives, the Sage meters provide an extremely repeat-

able (0.2% of Full Scale) and accurate output directly

proportional to the mass flow rate of the gas being

measured.

FLOW SENSOR
(Self Heated)

TEMPERATURE SENSOR
(Reference Sensor)

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

28

REV. 16-SIP/SRP

Features and Benefits

MAJOR BENEFITS OF THERMAL MASS FLOW METERS

■

Direct Mass Flow – No need for separate temperature or pressure
transmitters

■

High Accuracy and Repeatability – Precision measurement and
extraordinary repeatability

■

Turndown of 100 to 1 and resolution as much as 1000 to 1

■

Low-End Sensitivity – Measures as low as 5 SFPM (e.g., 1 SCFM
in a 6" pipe)

■

Negligible Pressure Drop – Will not impede the flow or waste energy

■

No Moving Parts – Eliminates costly bearing replacements, and
prevents undetected accuracy shifts

■

Dirt Insensitive – Provides sustained performance

■

Low cost-of-ownership

■

Ease of installation and convenient mounting hardware

SPECIFIC BENEFITS OF THE SAGE PRIME

■

High contrast photo-emissive OLED display with numerical Flow
Rate, Total and Temperature, as well as Graphical Flow Indicator

■

Photocell activated Screen Saver to extend display life

■

Calibration milliwatts (mw) is continuously displayed, providing for
ongoing diagnostics, and in-situ calibration check

■

Modbus® compliant RS485 RTU communications

■

Isolated 4-20 ma output

■

Rugged, user-friendly packaging with easy terminal access

■

Option for Solar Energy use (12VDC models)

■

Low power dissipation, under 2.5 Watts (e.g. under 100 ma at 24 VDC)

■

Powerful state-of-the-art microprocessor technology for high per­formance mass flow measurement and low cost-of-ownership

■

Proprietary digital sensor drive circuit provides enhanced signal
stability and unaffected by process temperature & pressure changes

■

Remote Style has Lead-Length Compensation. Allows remote elec­tronics up to 1000 feet from probe; Explosion Proof Junction Box has
no circuitry, just terminals

■

Field reconfigurability via Sage ADDRESSER or Sage DONGLE

■

Flow conditioning built into In-Line flow meters (1/2" and up)

■

Captive Flow Conditioners for Insertion Meter applications, if required

SAGE PRIME™ THERMAL MASS FLOW METER
FOR GASES

Sage Prime is the top selling meter in our Product Line. The Sage
Prime Thermal Mass Flow Meter features a bright, high contrast,
photo-emissive OLED display of Flow Rate, Total and Temper ature
in a robust, yet lightweight, dual-compartment industrial enclosure.
The flow rate is also displayed graphically in a horizontal bar graph
format. The rear compartment is completely separated from the
electronics, and has large, easy-to-access, well marked terminals, for
ease of customer wiring (see photo below). It is powered by 24 VDC
(12 VDC optional, or 115/230 VAC). The power dissipation is under

2.5 watts (e.g. under 100 ma at 24 VDC).
The Sage Prime Flow Meter is offered in Integral or Remote Style

(which has lead-length compensation up to 1000 feet as well as an
Explosion Proof Junction Box). Specify any standard probe length
or flow body size. It has a 4-20 ma output as well as a Pulsed Output
of Totalized Flow (solid state transistor drive). In addition, Sage Prime
supports full Modbus® compliant RS485 RTU communi cations (IEEE
32 Bit Floating Point).

Sage Prime is CE approved, and CSA and UL approved for

Hazardous Service2(see Approvals tab on the website).

CONTINUOUS DIAGNOSTICS & FIELD
CONFIGURABILITY

Sage Prime has continuous diagnostics. The raw calibration milli­watts (mw) is always displayed in the upper left hand corner of the
meter’s display. At any time, you can check this reading at a “no flow”
condition, and compare the reading to the original re ported “zero
flow” value noted on the last few lines of your meter’s Certificate of
Con formance or the flow meter’s data tag. This in-situ diagnostic pro ­cedure not only checks the sensor performance and the “live zero”
calibration point, but it also verifies that the sensor is clean. It essen­tially provides a means to validate that the meter is oper ating prop-

erly, verifies that there is no shift or drift, and eliminates the need for
annual fac tory calibrations. This simple field diagnostic procedure,

in addition, verifies that the sensor is free from

contamination, even without inspection.

Although Sage Prime is fully configured

upon shipment, for the pipe and process

con ditions requested, there are three

strategies if changes are needed: Sage

DONGLE; the Sage ADDRESSER software

program; or the Sage ADDRESSER advanced pro-

gram. Contact Sage for details.

1 Note, a built-in photocell continuously monitors the ambient light, and adjusts the display brightness for

optimum long-term life, and also senses motion which automatically switches display from Screen Saver
mode to Normal mode

2 Only available with 24VDC powered meters

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

29

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Sage PRIME™ Styles and Specifications

S I P S E R I E S – I N T E G R A L

Mou ntin g

H

ardw are

(in clud ed)

Flow Element is In-Line Style consisting of a choice of 316
Stainless Steel Schedule 40 Flow Bodies sized from 1/4” x
6” long to 4” x 12” long

Flow Element is Insertion Style, consisting of a 1/2” OD
probe (3/4” optional) with lengths up to 36” long
(typically 15” long) suitable for insertion into the center
of a process pipe

Electronics is Remote Style, with rugged windowed dual compartment NEMA 4 enclosure with display. The display is a high contrast photo­emissive OLED display with Screen Saver, and it displays Mass Flow Rate, Totalized Flow and Temperature as well as a graphical representation of
Flow Rate in a horizontal bar graph format. In addition, the calibration milliwatts (mw) is continuously displayed, providing ongoing diagnos­tics. Includes Remote Mounting Hardware.

The Flow Element’s Junction Box is Explosion Proof (Class 1, Div 1, Groups B, C, D), and does not have any electronics – only a wiring terminal
block. The Junction Box is connected to the Remote Electronics by 25 feet of lead-length compensated cable. The cable (6-conductor) can be
lengthened or shortened without affec ting accuracy (max loop resistance 10 ohms, over 1000 feet), if grounded properly.

REMOTE STYLE ELECTRONICS

X

SRP In-Line

1,3,5

SRP Insertion

2

ENGINEERING SPECIFICATIONS OF OPTIONAL SAGE PRIME PLUS

T

his is an optional version of Sage Prime offering a separate ground for the 24VDC

Power Supply (optional 5 VDC or 12 VDC Power Supplies) which isolates the Modbus

ground from the power supply ground. All other features of Prime PLUS are identical
to the standard Sage Prime, except Approvals do not apply at this time.

Flow Element is In-Line Style consisting of a choice of 316
Stainless Steel Schedule 40 Flow Bodies sized from 1/4" x
6” long to 4" x 12" long

Flow Element is Insertion Style, consisting of a 1/2" OD
probe (3/4" optional) with lengths up to 36" lo ng
(typically 15" long) suitable for inser tion into the center
of a process pipe

INTEGRA L STYLE EL ECTRO NICS

Electronics is Integral Style, with rugged windowed dual compart­ment NEMA 4 enclosure with local display. The display is a high con­trast photo-emissive OLED display with Screen Saver, and it displays
Mass Flow Rate, Totalized Flow and Temperature as well as a graphi­cal representation of Flow Rate in a horizontal bar graph format. In
addition, the calibration milliwatts (mw) is continuously displayed,
providing ongoing diagnostics.

X

SIP In-Line

1,3,5

SIP Insertion

2

1 Male NPT ends are standard, with flanged ends, tube, or butt weld optionally available
2 Mounting hardware such as Isolation Valve Assemblies, Compression Fittings, and Flanges, are optional
3 Chart of Flow Body length “X” is on Application Data Sheet on website as well as in the Prime O&M
4 Enhanced accuracy available upon request, especially if turndown limited. Contact Sage
5 Flow Conditioners are built into In-Line Style Flow Bodies from 1⁄2" to 4"

Sage Metering is your source for monitoring, measuring and controlling the gas mass
flow in your industrial process, building management system or environmental appli­cation. Our high performance, NIST Traceable, Thermal Mass Flow Meters will help in ­c

rease productivity, reduce energy costs, maximize product yields, and/or help reduce
environmental insult. Sage provides high quality In-Line and Insertion Thermal Mass
Flow Meters for a wide variety of industrial, commercial, and environmental moni­toring needs, including carbon credit verification for Greenhouse Gas reduction.

Our experienced application engineers, many of whom have worked in the
Thermal Mass Flow marketplace since its inception, will assist you in choosing
the proper gas Flow Meter for your application – and they will be pleased to offer
i

nstallation guidance to assure that the meter(s) selected will perform as accurately
as possible. Additionally, our Service Staff stand ready to support you with any
after-sale assistance that you may require.

S R P S E R I E S – R E M O T E

PRIME SIP/SRP

Standard accuracy is +/– 0.5% of Full Scale +/– 1% of reading with a turn­down of 100 to 1 and resolution as much as 1000 to 1. Repeatability is 0.2%.
NOTE: Enhanced accuracy optionally available with limited turn-down4.

The electronics has an isolated 4 to 20 mA output proportional to Mass Flow Rate
as well as pulsed outputs of Totalized Flow (24 VDC solid state transistor drive). In
addition, Modbus RS485 RTU communications is standard (IEEE 32 Bit Floating Pt).

O

pti onal SVA 05 Iso lati on V alve As semb ly

®

®

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

30

REV. 16-SIP/SRP

1 Upon start-up, the Revision No., Serial No., and Modbus ID will display for a few seconds.

Also the output configurations symbol is momentarily displayed

2 Note, a built-in photocell continuously monitors the ambient light, and adjusts the display

brightness for optimum long-term life, and also senses motion which automatically switches
display from Screen Saver mode to Normal mode

3 To view display, wave hand over display or use a flashlight. The Flow Meter displays for one

minute, then the Screen Saver resumes

1

Raw Calibration milliwatts (mw) for Diagnostics
and Periodic “Zero Flow” Calibration Check

2 Graphical Indication of Percentage of Full Scale

Flow Rate

3 Flow Rate
4 Totalized Flow (Consumption)

(Value is Retained during Power Outage
or Power Cycling)

5 Flashes with each pulsed output of consumption
6 Engineering Units of Flow Rate (the last digit

can be S(seconds), M(minute), H(hour), D(day)

7 Engineering Units of Consumption
8 Photocell activated Screen Saver extends display life

M E T E R I N G , I N C .

1 - 8 6 6 - 6 7 7 - S A G E

PRIME

COM M

PWR

.
.
.



N8˚'

4$'.



 4$'

1

2

3

4

5

6

7

Sage PRIME Organic (OLED) Display

1,2,3

8

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

31

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

HAZARDOUS LOCATION APPROVALS

All 24 VDC Powered Sage Prime Meters (SIP Integral

I

nsertion, SIP In-Line, SRP Remote Insertion, SRP

Remote In-Line) are approved for Class 1, Div 2,

Groups B, C, D, T4 and ATEX: Ex nA IIC T4.

AC Powered Meters are not approved.

Testing is in accordance with the following Safety

Standards:

• UL1604, Third Edition, Electrical Equipment for

Use in Class I and II, Division 2, and Class III

Hazardous (Classified) Locations

• CSA C22.2 No. 213-M1987 (R1999), First Edition,

Non-incendive Electrical Equipment for Use in

Class I, Division 2 Hazardous Locations

• UL/CSA 61010-1, Second Edition, Safety Require -

ments for Electrical Equipment for Measurement,

Control, and Laboratory Use – Part 1: General

Requirements

The following is required to comply with the above

mentioned Approvals

1) Repair of the product (or replacement of compo-

nents) is not possible by the user

2) As noted on the following label (see below) it will

contain the following markings: Ex symbol, nA

symbol IIC, temperature class

3) All Prime DC meters will be marked with “X”

which means that these Special Conditions of

Use will apply:

a) The completed meter must be installed with a

rigid or flexible metal conduit in order to satis-

fy approval conditions.

b) The meter has been approved for use with the

electronics enclosure in an ambient tempera-

ture from –20˚C < Ta < 65˚C.

4) Sage Metering considers a linear correction suit-

able for temperatures exceeding the temp code

rating of 40C (104F) thus no customer correction

is needed.

CONFORMANCE

All AC & DC Powered Sage Metering, Inc. Series

SIP (Sage Prime-Integral) and Series SRP (Sage Prime-

Remote) are CE Compliant for the following CE

directives:

• EN61000-6-4 for Electromagnetic compatibility;

• EN61000-3-2 for Harmonics;

• EN61000-3-3 for Flicker;

• EN61000-6-2 for Electromagnetic Compatibility

(Immunity for Industrial Environments), which

includes EN61000-4-2 for ESD;

• EN61000-4-3 for Radiated Immunity;

• EN61000-4-4 for EFT/B; EN61000-4-5 for Surge;

• EN61000 for Conducted Immunity;

• EN61000-4-8 for Magnetic Immunity;

• EN61000-4-11 for Voltage Interruptions

MEDICAL CONFORMANCE

Contact Sage Metering if Medical CE Conformance

is required. (AC Powered Sage Prime Meters only.)

The Standard is to IEC 60601-1-2:2007 Edition 3

Approvals

S

AGE METERING, INC.-MTRY, CA 93940/ PRIME THERMAL MFM

Class I, Div 2, Groups B,C,D T4 ATEX: Ex nA IIC T4 X

MODEL #

SERIAL # mW0 =

FOR USE IN HAZARDOUS LOCATIONS–CAUTION–DISCONNECT FROM POWER

S

UPPLY BEFORE OPERATING. KEEP COVER TIGHT WHILE CIRCUITS ARE ALIVE.

CONDUIT SEALS MUST BE INSTALLED WITHIN 18˚ OF THE ENCLOSURE.

ATTENTION–OUVRIR LE CIRCUIT AVANT

D’ENLEVER LE COUVERCLE GARDER

L

E COUVERCLE BIEN FERME TANT QUE LES CIRCUITS SONT SOUS TENSION.

UN SCELLEMENT DOIT ETR INSTALLE A MOINS DE 45CM DU BOITER.

Section

DRAWINGS

C

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

35

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

INSERTION STYLE

2

150#, 300#, or 600# flanged mounting is optionally avail­able. Available probe lengths are 6", 12", 15", 18", 24", 30",
36" or 48". Standard probe is 1/2" diameter (3/4" optional –
recommended for 36" or 48")

4.50

4.60

Probe Length

FLOW

SIP Series Integral Style Mass Flow Meters

IN-LINE STYLE

1,3

150#, 300#, or 600# flanged ends are optionally available.
(150# flanges recommended on 3" and 4" Flow Bodies)

5.38

2-3/4” Nominal

See Chart

FLOW

4.61

1 NPT Fittings standard
2 Flanged Mounting available for high pressure operation
3 Flow Conditioning built in to Flow Meter Pipe Sizes 1/2" and up. Contact Sage for optional

1/4" tube flow body.

Depth: DC Enclosure depth is 4.35"

AC Enclosure depth is 5.35"

1/2" NPT

User Entry

for Wiring

1/2" NPT

User Entry

for Wiring

CAUTION:
Do not rotate the
Enclosure of In-Line
Style Meters relative
to the Flow Tube, or
the calibration may
be effected since the
sensors may become
misaligned.

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

36

REV. 16-SIP/SRP

SRP Series Remote Style Mass Flow Meters

INSERTION STYLE

2

150#, 300#, or 600# flanged mounting is optionally avail­able. Available probe lengths (C) are 6", 12", 15", 18", 24",
30", 36" or 48".

See Chart

on Page 35

IN-LINE STYLE

1,3,4

150#, 300#, or 600# flanged ends are optionally available.
(150# flange recommended on 3" and 4" Flow Bodies)

1 NPT Fittings standard
2 Flanged Mounting available for high pressure operation
3 Flow Conditioning built in to Flow Meter Pipe Sizes 1/2" and up. Contact Sage for optional

1/4" tube flow body.

4 See Chart on page 35.
5 Junction Box has the following certifications: Class I, Groups B,C,D; Class II, Groups E,F,G; Class III;

4X, 7BCD, 9EFG; FM Standard 3615; UL Standard 1203; CSA Standard C22.2 No. 30; and NEMA
Compliance

4.60

4.50

3.50

Junction Box is Explosion
Proof, Class 1, Div. 1 & 2,
Group B, C, D

(

NO ELECTRONICS)

3/4" NPT
for Remote
Cable

1/2" NPT User
Entry for Wiring

3/4" NPT for
Remote Cable

3/4" NPT for

Remote Cable

1/2" CORD GRIP
SUPPLIED ON
ELECTRONICS

END

25' CABLE SUPPLIED
Can be shortened or
lengthened in the field
by up to 1000 ft. without
affecting calibration.

Junction Box is
Explosion Proof,
Class 1, Division 1 & 2,
Group B, C, D

(NO ELECTRONICS)

5

CAUTION: Do not rotate the Junction Box of In-Line Style
Meters relative to the Flow Tube, or the calibration may be
effected since the sensors may become misaligned.

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

37

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Sage Prime Remote Bracket Layout

MOUNTING OPTIONS

1

. Overhead with U-bolts (customer supplied) across

pipe on each leg

2. Vertically, as shown

3

. Horizontally

4.61

7.38

2.00

CORD GRIP or

NPT PLUG (as req’d)

BOTH SIDES

WAVE
WASHER

WAVE

WASHER

.266 DIA

HOLES

1/2" NPT
User Entry
for Wiring (2)

3/4" NPT for
Remote Cable

1/2" NPT User Entry
for Wiring (2)

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

38

REV. 16-SIP/SRP

11. 0 0

Mounting Hardware

3

STCF SERIES TEFLON FERRULE
COMPRESSION FITTING

1/2" tube x 1/2" pipe fitting (shown, not to scale), is
used for low pressure insertion applications to 125
psig (Stainless Steel Ferrule optional for higher pres­sure applications – up to 225 psig). Also available in
3/4" tube x 3/4" pipe size.

1. 9 2

1 At 250 psig, force exerted on 1/2" diameter probe is 50 lbs
2 Safety chain is designed to prevent probe from accidentally escaping from assembly during removal from pressurized pipe
3 Insertion meters can have optional flanged mounting (generally used for high pressure or very hot gases). This adaptation is not

shown. Consult factory for details.

4 Maximum gas temperature, 200F, unless high temperature models ordered.
5 Hot Tapping is feasible by removing Weldment (upper portion of assembly temporarily removed)
6 See page 46. SVA05 can be utilized for Sensor Functionality and Zero Self Check.
7 The allen wrench for SVA05 is

9

⁄64 (it is 3⁄16 for SVA07).

1/2" BORE
SINGLE PIECE
COLLAR CLAMPS

7

3/4"x1.5"
PIPE NIPPLES

3/4"x3"
BALL VALVE

SVA05 SERIES ISOLATION VALVE ASSEMBLY DETAIL

5,6

Cut away view of probe inserted through isolation
b

all valve assembly.

1/2"–3/4" BALL VALVE
WELDMENT WITH
1/2" TUBE TO PIPE
COMPRESSION FITTING

3/4"x1"

HALF COUPLING

(THREADOLET)

MOUNTING PLATE FOR THIN WALLED DUCTS
(INCLUDES STCF05 COMPRESSION FITTING)

4"

4"

NOTE: User needs to weld a 3/4" female threadolet
(of appropriate radius) to mate with existing pipe
after a 3/4" hole has been drilled in pipe. The 3/4"
Male Coupling of the Sage Isolation Valve Assembly
will thread into the user’s 3/4" threadolet.

SAFETY CHAIN

PROBE LENGTH SAFETY

(with sensor)2CHAIN LENGTH

2

12" 8.25"
15" 11.25"
18" 14.25"
24" 20.25"

SVA05 SERIES ISOLATION VALVE ASSEMBLY
FOR INSERTION METERS

4

(for Low Pressure SVA05 see page 39)

U

sed for pressures to 250 psig

1

(

shown for use with
1/2" diameter insertion meters). 150# or 300# flanged
mounting is op tionally available. Available sizes are
1/2" x 3/4" NPT (SVA05 shown), and 3/4" x 1" NPT
for use with 3/4" diameter insertion meters (SVA07).

SENSOR ASSEMBLY

EXTENDS 2.25" L

BELOW THE

LOWER EDGE OF

THE WELDED

COLLAR CLAMP

WITH CHAIN TAUT

3/4" THREADOLET
(User Supplied)

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

39

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Teflon Ferrule
3

16SS Compression Fitting

316SS 3/4"x 1-1/2" Pipe Nipple

8.00"
with

threadolet

7.00"
with

threadolet

HANDLE IN CLOSED POSITION HANDLE IN OPEN POSITION

3/4" Brass Full Port Ball Valve

1/2"-3/4" Brass Adaptor

5.5"

without

threadolet

6.5"
with

threadolet

Valve Handle

Customer

Supplied Threadolet

SVA05LP Low Pressure Isolation Valve Assembly

NOTES AND CAUTIONS

• Suitable for low pressure Air or Natural Gas applications
(maximum 50 PSIG)

• Assumes 1⁄2" Insertion Probe inserted to center of a Pipe
(see Sage Probe Insertion Guidelines)

• Teflon Ferrule permits ease of Probe insertion or removal

• Exercise caution when loosening Ferrule nut during
insertion and removal of Probe, since this model has no
Safety Chain

• Note, maximum upward force is 20% of pipe pressure
(i.e., 10 Lbs with 50 PSIG)

• The Assembly will be shipped with a plastic sleeve that
protects the 3/4" pipe nipple

• It is the Customer’s responsibility to weld a Female Threadolet
with correct diameter to pipe

UPSTREAM

F

L

O

W

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

40

REV. 16-SIP/SRP

Flanged Ends for
In-Line Meter (OPTIONAL)

Flanges for 31⁄2" pipe sizes and up,
have 8 bolt holes

Flanges for 3" pipe sizes and
smaller have 4 bolt holes

Flanged Mounting for
Insertion Meter (OPTIONAL)

Section

DIAGNOSTICS

D

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

43

S A G E M E T E R I N G , I N C .

Common Diagnostics

SYMPTOM: Display failure, or pixels extremely dim.
CORRECTIVE ACTION: Contact Factory. Certain types

of failures are under long term warranty. Please note
that the 4-20 ma will still function normally.

SYMPTOM: Display fading, or partially fading.
CORRECTIVE ACTION:

a) Some fading, particularly with those characters that

are lit up most frequently, is normal. The flow
meter will continue to function properly, and flow
meter accuracy and outputs will not be effected.

b) In extreme cases, contact the factory for display

replacement.

c) Note, in late 2009, the Sage Prime was modified

to incorporate a built-in photocell. The purpose
of the photocell is to adjust the display brightness
with ambient lighting. The brighter the surround­ing lighting conditions, the brighter the display.
Lower ambient lighting conditions, such as a fac­tory environment, will dim the display. The dis­play will be dimmest if operated in low ambient
lighting, or at night. The photocell circuit is
designed to extend the life of the display, and to
minimize fading.

d) Note, in early 2010, a further enhancement was

added to further extend the life of the display.
The above mentioned built-in photocell also
senses motion which automatically switches dis­play from Screen Saver mode to Normal mode.

SYMPTOM: Erratic Readings.
POSSIBLE CAUSES: If a large Motor or Generator or

Variable Fre quen cy Drive (VFD) is nearby the enclo­sure, it may be inducing sufficient analog noise into
the circuitry to temporarily corrupt the data.

SUGGESTED CORRECTIVE ACTION:

a) If a Power-Restart temporarily solves the problem,

than it is likely that the source of the noise was
the problem.

b) To prevent subsequent problems, if a Remote

Style Meter, move the enclosure as far away as
possible from the source (the Motor or VFD).

c) If an Integral Style Meter, mount the meter in

a different location (further from the source) or
move the source further from the meter.

SYMPTOM: Erratic Readings on a Remote Meter.
POSSIBLE CAUSE: In some cases, analog noise is

induced into the Remote cable causing erratic, or
climbing readings.

SUGGESTED CORRECTIVE ACTION:

a) Be sure the remote cable is installed in metal con-

duit and grounded on one end (in some cases,
grounding both ends may be required).

b) Also, avoid coiled cable, especially if not in metal

conduit.

c) Also, if extra cable exists, move the extra cable as

far away as possible from any source of analog
noise, such as large motors or VFDs.

SYMPTOM: Meter reading zero continuously, or Full
Scale continuously, or temperature reading is abnor­mally low (hundreds of degrees below zero).

POSSIBLE CAUSES/SUGGESTED CORRECTIVE ACTION:

a) It is likely that a wire is loose. But in rare cases,

a sensor could fail (i.e., if a standard sensor, HT01
or HT02 sensor exceeds a process temperature of
450˚F.)

b) Check for continuity to be sure the wiring is

making good contact at the terminals of the
Junction Box.

c) Also, to verify that the electronics and the sensor

serial number are the same, note the following:
The sensor’s serial number will come up upon
power up, right after Initializing on the Display. If
the serial number doesn't agree with the Junction
Box labels, that would affect cali bration (in other
words, sensors and electronics are a matched
pair—mixing them up will cause false readings).
Also metal Serial Number Tags are fastened to both
the electronics and the Junction Box. They must
have identical Serial numbers.

d) To check if a sensor has failed on a remote style

meter, it is easy to use the Junction Box to do so.
You must Power Down (shut off power), but you
do not need to remove the probe from the pipe.
Refer to page 24.

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

44

REV. 16-SIP/SRP

e) An Ohm Meter is required to check across the sen-

sor leads of the Flow Sensor. Look at the drawing
of the Junction Box. Disconnect the red wires on
the Factory Side to isolate and measure the resist­ance. If the reading is infinity or a short, it means
that sensor has failed.

f) Now check the Temperature Sensor. Disconnect the

white wires on the Factory Side to isolate and meas­ure the resistance. If you have infinity or a short, it
means that sensor is burned out. Note: Normally the

sensors will read approximately 110 ohms at 70˚ F. At
higher temperatures they should read a higher resist­ance, but both sensors should have a similar value.

g) On integral style meters (SIP), there is no Junction

Box. In that case, refer to the Prime Integral
Terminals on page 19 and check the sensor wires.
Remove the appro priate wires first (red pair for
flow, then white pair for temperature). Measure
their resistance. If reading infinity or short, it
means that sensor has failed.

SYMPTOM: Meter Railing (Pegging) or Reading High
POSSIBLE CAUSES/SUGGESTED CORRECTIVE ACTION:

a) Insufficient straight run (i.e. flow profile is dis-

turbed, causing errors).

b) Possible jet effect if upstream pipe is smaller than

meter flow body or if valve is too close upstream
to meter.

c) Not following Probe Insertion Guideline.

d) If sensor is inserted in reverse (“Upstream” mark

is facing downstream) Meter may over-report (or
under-report) by as much as 30%.

e) If sensor is not aligned properly, with “Upstream”

mark facing upstream, a rotation greater than
± 5 degrees may cause change in reading
(greater than ± 5 degrees and less than ± 20
degrees causes meter to over-report; a greater
rotation actually blocks the sensor, and causes

meter to under-report).

f) A downstream valve too close to the meter (flow

may be reflecting back).

g) Possibly caused by water droplets condensing out

of gas stream (which generally causes output to
spike; but if droplets are near continuous, output
may rail).

h) Meter is miswired, especially in Remote Style

application.

i) Possibly caused by water droplets condensing on

inside of pipe wall, which roll down or hit sensor
causing output to spike; but if droplets are near
continuous, output may rail.

Note: Recommend in -

stallation 45˚ from vertical (see drawing on page 68).

j) Possibly caused by water droplets condensing out

of gas stream and filling the cavity containing the
sensing elements (usually due to probes mounted
below horizontal in saturated pipes).

k) Sensor may be contaminated. Remove probe,

wipe off or clean with a solvent. Reinsert.

l) Using a different gas or gas mix than the meter

was specified and calibrated for.

m) If a Remote Style Meter (SRP), be sure Serial

Numbers of Junction Box and Remote Electronics
are identical (if not, errors in calibration are in ­evi table). To confirm, verify that Junction Box
Serial Number Tag has identical Serial Numbers
to Tag on Remote Enclosure.

n) Meter may appear to be reading high if user is

comparing Sage flow meter readings (SCFM) to
an uncorrected volumetric device (ACFM). For
example, at constant volume, a decrease in gas
temperature will increase the mass flow (SCFM).
That is completely normal.

SYMPTOM: Reading Low
POSSIBLE CAUSES:

a) Insufficient straight run (i.e. flow profile is

disturbed, causing errors).

b) Poor flow profile Upstream (insufficient upstream

straight run).

c) Not following Probe Insertion Guideline.

d) If sensor is inserted in reverse (“Upstream” mark

is facing downstream) Meter may over-report (or
under-report) by as much as 30%.

e) If sensor is not aligned properly, with “Upstream”

mark facing upstream, a rotation greater than ± 5
degrees may cause change in reading (greater than
± 5 degrees and less than ± 20 degrees causes meter
to over-report; a greater rotation actually blocks
the sensor, and causes meter to under-report).

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

45

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

f) Sensor may be contaminated. Remove probe, wipe

o

ff or clean with a solvent. Reinsert.

g

) Using a different gas or gas mix than the meter

was specified and calibrated for.

h) If a Remote Style Meter (SRP), be sure Serial

Numbers of Junction Box and Remote Electronics
are identical (if not, errors in calibration are in ­evita ble). To confirm, verify that Junction Box
Serial Number Tag has identical Serial Numbers
to Tag on Remote Enclosure.

i) Meter may appear to be reading low if user is

comparing Sage flow meter readings (SCFM) to
an uncorrected volumetric device (ACFM). For
example, at constant volume, an increase in gas
temperature will lower the mass flow (SCFM).
That is completely normal.

j) On most models, the Totalizer will not start count-

ing for 10 seconds after power up so any flow data
will not be accumu lated during this time.

k) Insufficient power supply—most products require

minimum 100 ma.

l) Excessive load on the 4-20 ma. (To check if prob-

lem is due to 4-20 ma output device, temporarily
remove device, and observe if display reads as
expected).

SYMPTOM: Totalizer can take up to 10 seconds to
update its reading when flow meter is first powered
up, or a channel is changed.
CORRECTIVE ACTION: None. This slight delay is com­pletely normal.

SYMPTOM: Display does not have power
POSSIBLE CAUSE: Mis-wiring

SYMPTOM: 4-20 mA output not tracking the flow rate

display

POSSIBLE CAUSE:

a) In normal operation (Self Powered) B4 and B5

must be jumpered to supply power to loop. See
pages 19 and 22.

b) In Externally Powered mode, the jumper must be

removed. Verify that 9 to 27 Volts DC is supplied
to externally power the loop as per page 19 or 22.

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

46

REV. 16-SIP/SRP

In-Situ Calibration Check

RECOMMENDED ON A QUARTERLY BASIS FOR EPA 40 CFR 98 PERIODIC

CALIBRATION VERIFICATION, CAR1PROTOCOLS, AND CDM2PROTOCOLS

Sage Prime has continuous diagnostics. The raw cali­bration milliwatts (mw) is always displayed in the
upper left hand corner of the meter’s display allow­ing the user to conduct an “in-situ” calibration. At
any time, you can check this reading at a “no flow”
condition and compare the reading to the original
re ported “zero flow” value noted on the last few lines
of your meter’s Certificate of Conformance or the
flow meter's data tag. This diagnostic procedure not
only checks the sensor performance and the “live
zero” calibration point, but it verifies that the sensor
is clean. It essentially provides a means to validate
that the meter is operating properly, verifies that
there is no shift or drift, and eliminates the need for
annual factory calibrations. This simple field diagnos­tic procedure also verifies that the sensor is free from
contamination, even without inspection.

1. Verify that meter has no gas flow

3

Close appropriate valves in the process to have a
“no flow” condition so you can check the “live
zero” mw output of the actual gas (it should be
checked at the same pressure as noted on
Certificate of Conformance).

If it is not possible to close valves in the
process (e.g. natural gas supply must be kept flow­ing), a user with a Sage SVA05 or SVA07 Isolation
Valve Assembly can check “zero” of the actual gas
and pressure without shutting off the gas supply.
Refer to SVA SERIES ISOLATION VALVE ASSEMBLY
DETAILS ON PAGE 38.
a) Loosen lower Collar Clamp completely

4

b) Slightly loosen compression fitting until Probe

can be lifted
c) Lift Probe until Safety Chain is taut
d) Tighten compression fitting
e) Close Valve
f) Check zero mw as per “2” below

Optionally, do an ambient air check by re ­moving probe and covering up sensor by capping
the sensor with a plastic bag, empty plastic water
bottle or other means of preventing flow (see 8).

2. Observe the raw mw on the top of the meter’s
display. After one to three minutes of “no flow”
stabilization, check the observed reading against
the flow meter’s data tag or last line(s) of your
Meter’s Certificate of Conformance.

3. A value within 5 milliwatts of the original Factory
value (assuming the same gas is checked at same
pressure) indicates that meter is still in calibration.

4. A value greater than 5 mw, but less than or equal
to 10 mw, also indicates that the meter is still in

calibration, but this reading may have been influ­enced by one or more of the following factors: gas
composition, pressure, dirt, non-zero conditions,
and sensor orientation. Any of these factors can
have an effect on mWo. It is a very sensitive data
point; that is why it is such a good check.

5. Note, if all of the above factors were remedied,
it would be expected that the mW zero would
report less than or equal to 5 milliwatts.

6. Note, in some cases, contamination of the sensor
is the only cause of the additional heat transfer
during the “no flow” test. Remove probe, and clean
the sensor (use an appropriate non-corrosive sol­vent to remove build up). A soft brush can be used
to gently clean the sensing surface, using caution
to avoid damaging the sensor elements (the RTD’s).

7. In summary, if a technician in the field were able
to simulate Sage calibration conditions, he too
would find that the mWo would be within one
mW or very close to that. Since this is not always
possible, we are finding that after considering all
of the field variables, a mWo in the field that is
within 10 mW is an acceptable value (see 9). This
would allow for a check to be done in the pipe
under application conditions.

8. Note, if desired, a second check can be conducted
as well but using ambient air: This validation
method requires that the sensor be removed from
the pipe and inserted in a container such as an
empty plastic water bottle.

9. For CAR

1

compliance Sage recommends a quar terly

In-Situ Calibration Check for the following Protocols:

U.S. Landfill Protocol, Version 4.0, Par. 6.2
Mexico Landfill Protocol, Version 1.1, Par. 6.2
U.S. Livestock Protocol, Version 3.0, Par. 6.2
U.S. Livestock Protocol, Version 4.0, Par. 6.3
Mexico Livestock Protocol, Version 2.0, Par. 6.2

As per the protocols, the maximum allowable drift
is 5%. Percent drift can be determined by multi­plying the mW change from factory value (see 2)
by 1.0% (i.e. each mW change equals 1% drift).

1 CAR is the Climate Action Reserve. The Climate Action Reserve is a national offsets program working

to ensure integrity, transparency and financial value in the U.S. carbon market. It does this by estab­lishing regulatory-quality standards for the development, quantification and verification of green­house gas (GHG) emissions reduction projects in North America. The Climate Action Reserve operates
alongside its sister program, the California Climate Action Registry (California Registry), which was
created by the State of California in 2001 to address climate change through voluntary calculation
and public reporting of emissions.

2 CDM Methodologies, ACM 0001, “Methodological tool to determine the mass flow of a greenhouse

gas in gaseous stream” (EB61 Report, Annex 11, Page 1).

3 Sage "zeros" the meter in a horizontal pipe. If you have a vertical pipe, mW will be slightly lower

at zero (also see note 4).

4 The allen wrench to loosen collar clamp is

9

⁄64 on the SVA05 (it is 3⁄16 on the SVA07).

Section

WARRANTIES AND

SERVICE WORK

E

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

49

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Warranties and Service Work

LIMITED WARRANTY

Sage Metering’s products are warranted against faulty

materials or workmanship for one year from the date

of shipment from the factory. Sage’s obligation is

limited to repair, or at its sole option, replacement of

products and components which, upon verification

by Sage at our factory in Monterey, California, prove

to be defective. Sage shall not be liable for installa-

tion charges, for expenses of Buyer for repairs or

replacement, for damages from delay or loss of use,

or other indirect or consequential damages of any

kind. This warranty is extended only to Sage prod-

ucts properly used and properly installed for the par-

ticular application for which intended and quoted;

and does not cover water damage due to improper

use of cord grips or removal of protective caps; and

does not cover Sage products which have been

altered without Sage authorization or which have

been subjected to unusual physical or electrical

stress. Sage makes no other warranty, express or

implied, and assumes no liability that goods sold to

any purchaser are fit for any particular purpose.

Transportation charges for materials shipped to the

factory for warranty repair are to be paid by the ship-

per. Sage will return items repaired or replaced under

warranty, prepaid. NOTE: No items will be returned

for warranty repair without prior written authoriza-

tion from Sage Metering, Inc. Sage does not warranty

damage due to corrosion.

GENERAL TERMS AND CONDITIONS

Detailed General Terms and Conditions can be found

on the Sage website (www.sagemetering.com) on a

link “General Terms” on the Footer of any page on

the website.

CANCELLATION / RETURN POLICY

Cancellation or Return: After issuance of a purchase

order (by phone, mail, e-mail or fax) or a credit card

order (by phone, mail, e-mail or fax), there will be a

cancellation fee for any cancelled order. Can cella -

tions must be in writing (by mail, e-mail or fax):

1) If credit card order or non-credit card order is

cancelled within 7 days of issuance of purchase

order or date order was placed (which ever is

earlier), there will be a 10% cancellation fee.

2) If credit card order or non-credit card order is

cancelled after 7 days, but prior to shipment,

there will be a 20% cancellation fee. (If order is

cancelled due to late delivery, the cancellation

fee will be waived. Late delivery is defined as

shipping a meter 7 days or later than the delivery

date acknowledged by Sage Metering at time of

placing order).

3) If a credit card customer decides to return the

equipment after shipment for credit, credit will

not be issued if equipment is damaged or if equip-

ment is returned after four (4) months of ship-

ment. If equipment is not damaged, then equip-

ment can be returned after issuance of a Return

Meter Authorization (RMA) by Sage. Returned

package must be insured by customer and must

reference proper RMA# on outside of package,

or package may be rejected (i.e., package will be

returned unopened). Credit Card customers will

be charged a 30% re-stocking fee (70% balance

will be credited back). Customer is responsible for

return shipping charges and any damage if

improperly packaged.

continued on next page

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

50

4) If a non-credit card customer decides to return

the equipment after shipment for credit, credit

will not be issued if equipment is damaged or if

equipment is returned after 1 month of ship-

ment, unless authorized by a representative at

Sage Metering, Inc. The Sage representative will

issue a Return Material Authorization (RMA) at

that time and will advise of the restocking fee.

Returned package must be insured by cus-

tomer and must reference proper RMA# on

outside of package, or package may be rejected

(i.e., package will be returned unopened).

Customer is responsible for return shipping

charges and any damage if improperly packaged.

REV. 16-SIP/SRP

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

51

RETURNING YOUR SAGE METER

A Return Material Authorization Number (RMA#)

must be obtained prior to returning any equipment

to Sage Metering for any reason. RMA#s may be

obtained by calling Sage Metering at 866-677-7243

or 831-242-2030 between 8:00 am and 5:00 pm

Monday through Friday.

A Sage RMA Form (see page 52) must be filled out

and included with the meter being returned to

Sage Metering. RMA Form is also accessible by

clicking the “Contact” tab of the Sage website

(www.sagemetering.com).

Take special care when packaging your meter for

return to the factory. The sensor in particular may

easily be damaged if not prevented from shifting

around within the package and if the sensor itself is

not covered to keep it from contacting other pack-

age contents. Any damage resulting from improper

packaging is the responsibility of the shipper.

A purchase order is required prior to an RMA being

issued. Most repairs or recalibrations can be quoted

over the phone. For equipment that must be evaluat-

ed, an Evaluation purchase order in the amount of

$150 is required. Once an evaluation is completed

and a quote has been issued, you can choose to pro-

ceed with the work or have the unit returned with

only the evaluation and freight fee billed.

In accordance with the “Right to Know Act” and

applicable US Department of Transportation (DOT)

regulations, Sage Metering will not accept delivery of

equipment that has been contaminated without writ-

ten evidence of decontamination, and has instituted

the following Return/Repair conditions. Strict adher-

ence to these conditions is required. Returned equip-

ment that does not conform to the requirements list-

ed below will not be processed. If Sage Metering finds

evidence of contamination, we may, at our option,

have the unit returned at your expense. For your ref-

erence, the requirements for packaging and labeling

hazardous substances are listed in DOT regulations

49 CFR 172, 178, and 179.

1. The equipment must be completely cleaned and

decontaminated prior to shipment to Sage

Metering. This decontamination includes the sen-

sor, probe, electronics and enclosures internally

and externally. All packaging must be clean and

free from contamination.

2. A Material Safety Data Sheet (MSDS) is required

for all process fluids and gases that have been in

contact with the equipment. This includes fluids

or gases used in cleaning the equipment. A

Decontamination Statement is also required for

each meter returned using a different gas or fluid.

Both the MSDS and the Decontamination

Statement are to be attached to the OUTSIDE of

the shipping container. If both documents are not

attached, you will be called, and the equipment

sent back to you at your expense.

3. The decontamination Statement must include

the following required information

A. A list of all chemicals and process fluids used

in the equipment, including decontamination

fluids or gases.

B. The model and serial number of the equip-

ment being returned.

C. A company officer or other authorized person’s

signature on the statement.

Return Shipping Address:

Sage Metering, Inc.

8 Harris Court, Building D1

Monterey, CA 93940

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

52

REV. 16-SIP/SRP

RETURN MATERIAL AUTHORIZATION R

MA #

Date

R

ETURN CUSTOMER INFORMATION

Customer’s Name Fax #

Customer’s Contact Name Phone #

Email Address

CUSTOMER’S RETURN ADDRESS

Bill to: Ship to:

RETURN PRODUCT INFORMATION

Model No. Serial No(s).

FLOW: MIN NORMAL MAX

TEMP: MIN NORMAL MAX

PRESSURE: MIN NORMAL MAX

GAS LINE SIZE

REASON FOR RETURN / DESCRIPTION OF SYMPTOMS

(All non-warranty repairs could be subject to a minimum evaluation charge)

Recommended steps to be used to duplicate problem/symptoms

Sage Metering Technical Contact

Take special care when packaging your meter for return to the factory. The sensor in particular may easily
be damaged if not prevented from shifting around within the package and if the sensor itself is not cov­ered to keep it from contacting other package contents. Any damage resulting from improper packaging
is the responsibility of the shipper.

SAGE METERING, INC.

8 Harris Court, Building D-1 / Monterey, California 93940

PHONE: [phone] / FAX: [phone]

Section

MODBUS

F

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

55

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Modbus Register Listing

SAGE PRIME REV. 1.80–2.07

*SCALED INT32 register contents form INT32 values by multiplying the IEEE FLOAT x 1000
ex. FLOAT –> 112.768 = SCALED INT32 –> 112768

2

56

256

257

257

257

257

257

257

257

257

257

TEMP

TEMP

TEMP

TEMP

FLOW

FLOW

FLOW

FLOW

FLOW

FLOW

514

516

518

520

522

524

526

528

530

532

534

536

538

540

542

544

546

548

770

772

774

776

778

780

782

784

786

788

790

792

794

796

798

800

802

804

UINT8

UINT8

UINT8

UINT8

UINT1

UINT1

UINT1

UINT1

UINT1

UINT1

UINT1

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

UINT32 IEEE Float SCALED INT32*

Reg Reg Reg Reg

Offset O ffset Type Offset Type Description

format flag

modbus_unit_id

output mode sel

fix_pt selection

bRun

bTotal

bEEProm

bReset

bLeadEn

bDACIo

bDAChi

CAL_VAL

K-FACTOR

VREF

LOAD-RES

COEFF A

COEFF B

COEFF C

COEFF D

DISP A

DISP B

DISP C

DISP D

COEFF A

COEFF B

COEFF C

COEFF D

COEFF E

COEFF F

302

304

306

308

310

312

314

316

318

320

550

552

554

556

558

578

580

582

584

586

588

590

592

594

596

598

600

602

806

808

810

812

814

834

836

838

840

842

844

846

848

850

852

854

856

858

FLOAT

F

LOAT

FLOAT

FLOAT

FLOAT

UINT16

UINT16

UINT32

ASCII

ASCII

UINT32

UINT32

UINT32

UINT32

UINT32

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

FLOAT

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

LONG

UINT32 IEEE Float SCALED INT32*

Reg Reg Reg Reg

Offset O ffset Type Offset Type Description

iir filter coeff

fl

ow_min

flow_max

PULSE COUNT

temp_max

dac1_min

dac1_max

serial number

RATE string

TOTAL string

current totalizer

ADC0

ADC1

ADC2

ADC3

current flow

current temp

rtd_mWatts

rtd_res

ref_res_r

ref_res_d

dac_smooth

lead

oheat

bv

fv

tv

lv

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

56

REV. 16-SIP/SRP

Sage Prime Meters support communication with

other devices via MODBUS® protocol using RTU

transmission mode. The Modbus protocol defines a

message structure that controllers will recognize and

use, regardless of the type of networks over which

they communicate. It establishes a common format

for the layout and contents of message fields.

Transactions use a master-slave technique, in which

only one device (the master) can initiate transactions

(called queries). The other devices (the slaves)

respond by supplying the requested data to the

master and by taking the action requested in the

query. Sage Meters operate as slaves to other Modbus

devices and default to 19200-8-E-1, however, the

following modes may also be software selectable:

9600-8-N-1 (Baud-Bits-Parity-Stop)
9600-8-E-1
9600-8-O-1
19200-8-N-1

1

19200-8-E-1 (Default)
19200-8-O-1

MESSAGE FRAMING

Messages start with a silent interval of at least 3.5

character times followed by 4 fields and then fol-

lowed by another silent interval of at least 3.5 char-

acter times. The first field contains the device

address. The second field contains the function code.

The third field contains the data and byte counts.

The fourth field contains the CRC value.

ADDRESS FIELD

T

he address field contains one byte. Sage Prime

Meters will transmit response packets to addresses

which are between 1 to 240 decimal (inclusive).

M

odbus packet writes may be sent to broadcast

address 00, however the Prime will not reply with a

response packet.

FUNCTION CODE FIELD

The function code field contains one byte. See the

section titled Function Codes Supported by Sage Prime.

DATA FIELD

The data field contains four or more bytes. This

information is used by the Meter to take the action

defined by the function code, or to read or write data

to one or many registers.

CRC FIELD

The CRC-16 (cyclical redundancy check) field is two

bytes, containing a 16-bit binary value. The CRC

value is calculated by the transmitting device, which

appends the CRC to the message. The receiving

device recalculates a CRC during receipt of the mes-

sage, and compares the calculated value to the actual

value it received in the CRC field. If the two values

are not equal, the message will be discarded.

Sage Metering Modbus Protocol Rev. 1.80–Rev. 2.07

1 Parity on the Wireless Devices manufactured by Obvius is “None” rather than “Even”. The Sage

default is 19200-8-E-1. Change to 19200-8-N-1 for the Obvius Modhoppers and related wireless
devices.

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

57

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

03 (0X03) READ HOLDING REGISTERS

Identical operation as code 04 READ INPUT REGIS-

T

ERS described below, except READ only.

04 (0X04) READ INPUT REGISTERS

Reads the binary contents of the specified register.

This is READ/WRITE register. Sage Prime values are

typically 32 bits wide (4 bytes) and contain a single

IEEE754 floating point value. Modbus registers are

16 bits wide (2 bytes) so a minimum of 2 Modbus

registers are required to transfer all floating point

bits to the master. See section titled Sage Floating

Point Format.

Query

The query message specifies the starting register

address and the quantity of registers to be read.

0x03 READ MULTIPLE HOLDING REGISTERS or
0x04 READ MULTIPLE INPUT REGISTERS

–QUERY– –RESPONSE–
SA – SLAVE ADRESS SA
04 – FUNC CODE 04
RH – REG ADDR HI BC – # of data bytes to follow
RL – REG ADDR LO DATA0
00 – # OF REGS HI DATA1
CT – # OF REGS LO DATAn
CH – CRC MSB CH CRC MSB
CL – CRC LSB CL CRC LSB

REG ADDR HI (RH) is set to:

01 for INTEGER access of integral values
02 for IEEE754 floating point
03 for Scaled (x1000) long integer of floating point value

REG ADDR LO (RL) is the starting address index into the register
structure. See section titled Sage Register Index Values.

CT is the register count needed to transfer data. Typically this byte
is set to 02 to request 1 full IEEE754 floating point value. (Modbus
single registers are 16 bits wide, Sage floating point values are
32 bits wide.)

DATA0-DATAn are bytes in binary format returned from the slave device

representing the contents of the selected register(s).

NOTE: values indicated with 0x prefix are in hexadeci-

mal, otherwise in decimal notation.

Function Codes Supported by SAGE Prime

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

58

REV. 16-SIP/SRP

16 (0x10) WRITE REGISTERS

W

rites the binary contents of the specified register

into the meter. Sage Prime values are typically 32 bits

wide (4 bytes) and contain a single IEEE754 floating

p

oint value. Modbus registers are 16 bits wide (2

bytes) so a minimum of 2 Modbus registers are

required to transfer all floating point bits into the

meter. See section titled Sage Floating Point Format.

Query

The query message specifies the starting register

address and the quantity of registers to be written.

16 (0x10) WRITE MULTIPLE REGISTERS

–QUERY– –RESPONSE–
SA – SLAVE ADRESS SA
0x10 – FUNC CODE 0x10 – 16 FUNC CODE
RH – REG ADDR HI RH – REG ADDR HI
RL – REG ADDR LO RL – REG ADDR LO
00 – # OF REGS HI 00 – # REGS HI
CT – # OF REGS LO CT – # REGS LO
BC – BYTES COUNT CH – CRC MSB
DATA0 CL – CRC LSB
DATA1
DATAn
CH – CRC MSB
CL – CRC LSB

REG ADDR HI (RH) is set to:

01 for INTEGER access of integral values
02 for IEEE754 floating point
03 for Scaled (x1000) long integer of floating point value

REG ADDR LO (RL) is the starting address index into the register
structure. See section titled Sage Register Index Values.

CT is the register count needed to transfer data. Typically this byte is
set to 02 to request 1 full IEEE754 floating point value.

BC is the actual number of bytes that follow.

DATA0-DATAn are bytes in binary format transmitted to the slave
device representing the contents of the selected register(s).

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

59

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

17 (0x11) REPORT SLAVE IDENTIFICATION*

This query requests from the specified slave address

a detailed identification packet with a run status, and

Sage Prime and firmware revision response. (Prime

will not respond to broadcast slave address 00.)

Query

The query message specifies the slave address, func-

tion code, and CRC check words.

17 (0x11) REPORT SLAVE ID

–QUERY– –RESPONSE–
SA – SLAVE ADRESS SA
11 – FUNC CODE 11
CL – CRC LSB BC – BYTES COUNT, 19
CH – CRC MSB SD – SLAVE ID (DEVICE SPECIFIC), 0x5A

RS – RUN STATUS INDICATOR, 0xFF
ASCII Text – SAGE PRIME v1.81x
CH

CL
Response
The Sage Prime will respond with an echo of the slave address and
function code. The byte count will be 19 (0x13) to allow the master to
account for all the remaining bytes that follow.

REPORT SLAVE ID Example: (Slave Address = 0x30 = 48, default)
Master Query –> 30 11 D5 BC
Prime Response –> 30 11 13 5A FF 53 61 67 65 20 50 72 69 6D 65 20

76 31 2E 38 31 20 F1 2B

ASCII translation–> Sage Prime v1.81

NOTE: THIS PAGE APPLIES TO REV. 1.81–1.83

ILLEGAL FUNCTION CODES*

The Sage Prime will respond to other Modbus func-

tion codes not documented in this revision, these

codes are considered unsupported by Sage Metering.

Unsupported function codes will cause the Prime to

reply with Modbus ILLEGAL FUNCTION status.

*Not implemented in revision 1.80

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

60

REV. 16-SIP/SRP

SAGE REGISTER INDEX VALUES

D

ATA ADDRESS

TYPE VALUE SIZE INDEX DESCRIPTION
Byte slave_ad 1 BYTE 1 Modbus Slave Address*
fl

oat flow_rate; 1 IEEE754 578 actual flow rate

fl

oat flow_temp; 1 IEEE754 580 process temperature
float rtd_mWatts; 1 IEEE754 582 sensor power reading
float rtd_res; 1 IEEE754 584 actual sensor probe resistance
fl

oat ref_res_r; 1 IEEE754 586 actual temperature probe resistance
integ totalizer; 1 uLONG 312 actual displayed total

*

NOTE: Sage Prime Meters are factory programmed with the MODBUS slave address = 48 (0x30).
It may be extremely useful to be able to write to an unknown slave address with a simple broadcast
command. Be sure only one Sage Prime is connected during any broadcast writes using slave
a

ddress = 0.

Writing into unspecified registers (not defined above)

can render the unit non-functional or overwrite fac-

tory calibration data yielding incorrect operation.

EXAMPLE MODBUS PACKET

Query

This packet will request of the addressed slave to

respond by sending back the contents of registers

578 to 582 (inclusive). Three registers: flow rate

through RTD mWatts in IEEE754 floating point

format.

0x31 – SAGE PRIME SLAVE ADDRESS (0x31 Hex = 49 Decimal default)
0x04 – READ INPUT REGS FUNCTION CODE
0x02 – STARTING REGISTER HI BYTE (0x01 = 256, 0x02 = 512, 0x03 = 768)
0x42 – STARTING REGISTER LO BYTE (512 + 66 = register access = 578)
0x00 – COUNT MSB (ALWAYS ZERO)
0x06 – COUNT OF ALL DESIRED REGISTERS
0xD5 – CRC HI BYTE
0x85 – CRC LO BYTE

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

61

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

INTEGER REPRESENTATION

Computer systems hosting a MODBUS network

t

ypically store integer values to represent non-

fractional quantities.

All registers addressed above 256 (0x0100-0x1FF) will

transfer 16 bit integral quantities in response to all

master queries. MODBUS requires that the register

count reflects each 16 bit registers transmitted to

ensure that no bytes are missing in the transfer of

integer quantities. (Note: Most Sage Prime registers

are IEEE754 quantities; integer representations of

these registers will require significant translation.)

IEEE754 FLOATING POINT

Computer systems hosting a MODBUS network typi-

cally store single precision floating point data in the

standard IEEE754 format.

All registers addressed above 512 (0x0200-0x02FF)

will transfer full 32 bit single precision quantities

in response to all master queries. MODBUS requires

that two 16 bit registers are transmitted to ensure

that no bytes are missing in the transmission of

32 bit quantities.

SCALED DECIMAL REPRESENTATION

Computer systems hosting a MODBUS network may

choose represent single precision floating point val-

ues as scaled long integers (32 bit values). The Sage

Prime will convert floating point registers to integral

units by multiplying the value by 1000.

Ex. Floating point value 1234.567 will be converted

to integral value 1234567

All registers addressed above 768 (0x0300-0x03FF)

will transfer full 32 bit scaled integer quantities in

Sage Register Output Format

response to all master queries. MODBUS requires

that two 16 bit registers are transmitted to ensure

that no bytes are missing in the transmission of

32 bit quantities.

For more information on the MODBUS protocol, see:

http://www.modbus.org/tech.php

SAGE ADDRESSER SOFTWARE

Addresser is a convenient software kit that includes

Addresser software, as well as an optically isolated

ULINX RS485 to USB converter. The Addresser is a

READ/WRITE Program with drop-down menus for

convenient user interface between your PC or laptop

and the Modbus Terminals of the Sage Prime. Con -

tact Sage for ordering information and instructions.

SAGE ADDRESSER TECHNICAL ASSISTANCE

Visit our website at www.sagemetering.com and

navigate to the Manuals/Download section

(http://www.sagemetering.com/manual.htm).

Click on the “Instructional Manuals & Technical

Data” button. User name: sage; password: 7243737.

Click on link “Click to View ADDRESSER

Procedures” and/or “Click to View MODBUS

Poll/PRIME Communications Setup Instructions”.

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

62

REV. 16-SIP/SRP

Sage Addresser Typical Printout (Version 3.14)

Units: SCFM Modbus:

0x31

Copyright 2011, Sage Metering Inc. 1 of 1

G

Section

APPENDIX

G

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

65

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

Sage Prime™ Field Programmable “Dongle”

Although virtually any setting on Sage Prime can

be changed by users who have Modbus® capability

(see pages 19 and 22 for terminal connections), not

all customers have that capability to communicate

with the Prime using its Modbus Compliant RS485

Communications. However, users do not need to

have a Modbus host or any special skill, since they

can also change configurations in the field by using

the patent pending Sage “Dongle”.

The Sage Prime device known as a “Dongle”, was

developed to facilitate making changes on Sage

Prime Flow Meter settings in the field. Simply con-

tact Sage and specify your requirement (such as the

new Full Scale, new Pipe Area, etc), and the device

will be programmed at Sage and sent directly to you

within a few days (there is a slight fee for this serv-

ice). The patent-pending Dongle can also be config-

ured as a Reset Totalizer device (i.e. it can be used

repeatedly, with any Sage Prime to easily reset the

Totalizer). The Dongle can also be programmed to

change Engineering Units, Filter Response and

numerous other parameters.

In fact, Dongles can also be used to provide multiple

gas calibrations. In this case, the requirements must

be specified at the time of ordering. For example, one

meter can be calibrated for four different gases with

totally different calibration ranges, by providing four

Dongles with the Flow Meter. When a different gas

calibration is needed, simply upload the data from

the appropriate Dongle. It only takes a few seconds

to do so.

Dongles come with a convenient well marked cable

that is connected to the RS485 terminals. Simply

remove the rear cover, connect the Dongle, and push

the button on the Dongle. An LED will illuminate,

and within 3 seconds the light will go out signaling

that the data transfer is complete.

1

Remove the

Dongle, close the cover, and you will notice that the

new settings have been uploaded (or in the case of a

Totalizer-Reset Dongle, you will notice that the

Totalizer has zeroed).

1 If the light does not go out, it will be necessary to repeat procedure. Remove finger for a few seconds

and then push button again.

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

66

REV. 16-SIP/SRP

TILT ENCLOSURE 45º
(forward or backward)
FOR APPLICATIONS
WHERE CONDENSATION
MAY DEVELOP ON INSIDE
WALL OF PIPES

Correction Factors For
Variation From Original
Digester Gas Calibration

Sage can calibrate for any Digester Gas, Bio Gas or

Landfill Gas Mix. However, it may be helpful to have

correction factors for a typical calibration, in the

event that the composition changes after delivery.

The following examples assume that the initial cali-

bration was set up for 60% CH4 and 40% CO2.

a) 65% CH4 and 35% CO2: Multiply reading by

0.982 to correct it for new composition

b) 70% CH4 and 30% CO2: Multiply reading by

0.965 to correct it for new composition

c) 55% CH4 and 45% CO2: Multiply reading by

1.0185 to correct it for new composition

For smaller changes, the corrections are linear in

between

d) Also, if 100% saturated with H2O vapor (non-

condensing), multiply readings by 1.042

e) If 50% saturated with water, multiply reading by

1.021

(Water vapor correction is linear in between)

Also, use the 45 degree mounting method in order to

avoid droplets from hitting the sensor and causing

spikes (see above right)

Installations Where Pipe
Condensation May Develop

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

67

S A G E M E T E R I N G , I N C .

REV. 16-SIP/SRP

J-Box and Upstream Orientation

5

.0

4.40

5

.0

2.72 2.72

FLOW DIRECTION

FLOW DIRECTION

F

RONT VIEW LOOKING DOWNSTREAM LOOKING UPSTREAM

FLOW DIRECTION

S A G E M E T E R I N G , I N C .

O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l

68

REV. 16-SIP/SRP

What is a Thermal Mass Flow Meter?

FLOW SENSOR
(Self Heated)

TEMPERATURE SENSOR
(Reference Sensor)

• What is a Thermal Mass Flow Meter? It is a meter

that directly measures the gas mass flow based

on the principle of conductive and convective

heat transfer.

• All Meters have probes (Insertion Style) or Flow

Bodies (In-Line Style) that support a pair of

sensors, which are in contact with the gas.

• The sensors are RTDs, which are resistance tem -

perature detectors. They consist of highly stable

reference-grade platinum windings. In fact, we

use the same material that is used as Platinum

Resistance Standards at the NIST.

• The RTDs are clad in a protective 316 SS sheath

for industrial environments.

• One of the RTDs [See Diagram below] is self-heated

by the circuitry and serves as the flow sensor. The

other RTD acts as a reference sensor, and measures

the gas temperature. Essen tial ly it is used for tem-

perature compensation.

• The Sage proprietary hybrid-digital sensor drive

circuitry maintains a constant overheat between

the flow sensor and the reference sensor. As gas

flows by the heated sensor (flow sensor), the

molecules of flowing gas carry heat away from

this sensor, and the sensor cools down as it loses

energy. The circuit equilibrium is disturbed, and

momentarily the temperature difference between

the heated sensor and the reference sensor has

changed. The circuit will automatically (within

1 second) replace this lost energy by heating

up the flow sensor so the overheat temperature

is restored.

• The current required to maintain this overheat

represents the mass flow signal. There is no need

for external temperature or pressure devices.