Fluke 1E5 molbloc Data sheet

1E5 molbloc

™

100 slm Mass
Flow Element

The 1E5 molbloc extends the range of the molbloc/molbox
system using molbloc-L elements to 100 slm (nominal, N2,
see range chart on overleaf).

Though the 1E5 molbloc external dimensions are similar to
the 3E4 and 1E4 molblocs, it differs from all other molblocs in
a number of ways that should be considered when configur­ing a new molbloc/molbox system or adding a 1E5 molbloc to
an existing system.

Technical Data

Features

• Low differential pressure range

(0 kPa to 10 kPa nominal) relative to
other molblocs

• Measurement uncertainty with

molbox1 of ± 0.5 % of reading from
25 % FS to 100 % FS, 0.05 % FS under
25 %. Best results are obtained with
molbox RFM microrange, use with
molbox RFM without microrange is
not recommended (see specifications
on overleaf).

• High pressure calibrations are not

available (full mod, upstream or
single P, low pressure or downstream
calibrations only).

• End fittings are 9.525 mm (0.375 in)

VCR male to accommodate 12.7 mm
(0.5 in) bead VCR female hardware.
All other molbloc-L sizes are

6.35 mm (0.25 in) VCR male.

• Uses a special, hi flow, molstic

designed for the 1E5 molbloc.

Side view

A

B

Top view

C

End view

Use this data sheet in conjunction with the molbloc/molbox
Gas Calibration System Brochure (3031052).

molbloc-L
dimensions

1E5

F

Bottom view

E

Connects to 0.5 in bead VCR F

M4 X 0.7 thread

7.00 mm (0.276 in) deep, 2 Pl

D

9.525 mm (0.375 in)
VCR M end fittings

A 74.50 mm (2.933 in)

B 24.00 mm (0.945 in)

C 48.00 mm (1.890 in) sq

D 80.00 mm (3.150 in)

E 28.00 mm (1.102 in)

F

164.00 mm (6.458 in)

Ranges with

General specications
low pressure
calibrations

molbloc-L

Full mod, low pressure

•

Downstream

•

Single P, low pressure

•

Gases 1E5

Nitrogen N

Argon Ar 80000

Helium He 100000

Sulfur hexafluoride SF

Inert

Xenon Xe 30000

Butane C4H

Ethane C

Ethylene C

Hydrogen H

Flammable

Methane CH

Propane C

Carbon tetrafluoride CF

Hexafluoroethene C

Trifluoromethane CHF

Fluoro-carbons

Air Air 100000

Carbon dioxide CO

Carbon monoxide CO 100000

Nitrous oxide N

Other

Octafluorocyclobutane C

Oxygen O

A bold value indicates th at the ma ximu m flow is limited
by the ma ximum Reynolds num ber value of 1200 which is
reache d before t he norma l 1E5 dif ferential pressure r ange
is reached. In t hat cas e, the second value gives the minimum
flow for wh ich meas urement uncer tainty is ± 0.5 % of r ead­ing (both molbox1 and molbox RFM). With the molbox RFM
microrange option, t his va lue is divided by 5.

Where t here is no value in the table (–) , thi s indic ates
that the maximum Reynolds number i s reached before the
differential pressure reaches 1 kPa, therefore calibration
with t hat gas i s not usef ul.

Ordering information

Model

1E5 VCR-V-Q molbloc mass flow element

2 Fluke Corporation 1E5 molbloc™ 100 slm Mass Flow Element

size and full

scale flow

(sccm @ 0 °C)

Size

100000

2

6

20000

10

2H6

2H4

3H8

2F6

4F8

60000
50000

70000
40000

200000

2

120000

4

40000

36000

4

25000

38000

3

30000

60000

2

30000

O 60000

2

30000

80000

2

—

—

—

—

—

Flow measurement molbox1™

Measurement update rate 1 second 1 second
Range 0 slm to 100 slm depending on gas

Resolution 0.04 % FS 0.01 % FS
Linearity ± 0.25 % of reading from

Repeatability ± 0.2 % of reading from

Precision

Predicted Stability

Measurement Uncertainty
and any molbox supported gas for
which the molbloc is calibrated)

1

Precision: Combined li nearity, hysteresi s, repeatabilit y.

2

Stability: Max imum c hange i n zero and span over speci fied ti me period for ty pical molbox and molbloc used under

typical conditions. As stabil ity ca n only be pr edicted, stability for a specific molbox and molbloc should b e established
from experience.

3

Measurement Uncertainty: Ma ximu m deviation of the molbox flow indication f rom the true value of the flow through

the mol bloc inc luding precision, stability and DHI cal ibrat ion sta ndard accuracy. Measurement u ncertaint y is somet imes
referred to as “ac curacy”.

Pressure dependent calibration types

Calibration type Operating pressure Nominal differential

Full mod, low pressure 250 kPa to 325 kPa absolute

downstream Atmospheric pressure downstream of molbloc 18 kPa (2.6 psi)

Single P, low pressure
(non-N

1

gases only)

2

(A700k or molbox1 A350k)

(see molbloc ranges table)

25 % to 100 % FS,

± 0.025 % FS under 25 % FS

25 % to 100 % FS,

± 0.02 % FS under 25 % FS

± 0.32 % of reading from

25 % to 100 % FS,

± 0.032 % FS under 25 % FS

2

(One Year) ± 0.1 % of reading from

25 % to 100 % FS,

± 0.01 % FS under 25 % FS

3

(N2

± 0.5 % of reading from

25 % to 100 % FS,

± 0.125 % FS under 25 % FS

(22 psia to 33 psia) upstream of molbloc

Any specified single molbloc upstream pressure between

250 kPa and 325 kPa absolute (22 psia to 33 psia)

Fluke. Keeping your world
up and running.

Fluke Calibration
PO Box 9090, Everett, WA 98206 U.S.A.

Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands

For more information call:
In the U.S.A. [phone] or
Fax [phone]
In Europe/M-East/Africa [phone] or
Fax [phone]
In Canada (800)-36-FLUKE or
Fax [phone]
From other countries [phone] or
Fax [phone]
Web access: http://www.fluke.com

©2010 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 6/2010 3191976B B-EN-N

Modification of this document is not permitted
without written permission from Fluke Corporation.

molbox RFM™

(with microrange option)

0 slm to 100 slm depending on gas

(see molbloc ranges table)

± 0.25 % of reading from

5 % FS to 100 % FS,

± 0.0125 % FS under 5 % FS

± 0.2 % of reading from

5 % FS to 100 % FS,

± 0.01 % FS under 5% FS

± 0.32 % of reading from

5 % FS to 100 % FS,

± 0.016 % FS under 5 % FS

± 0.2 % of reading from

5 % FS to 100 % FS,

± 0.01 % FS under 5% FS

± 0.5 % of reading from

5 % FS to 100 % FS,

± 0.025 % FS under 5 % FS

pressure at max flow

10 kPa (1.45 psi)

10 kPa (1.45 psi)

®