1. INTRODUCTION
Page 3
© 1995 - 2010 Fluke Corporation, DH Instruments Division
1.1.1.2
molbloc-S Flow Element
molbloc-S elements use critical (sonic) flow venturi nozzle technology to measure
flows which overlap with the ranges of molbloc-L and cover the higher end of the
molbloc/ system flow range. The mass flow rate through a molbloc-S
element is roughly proportional to the upstream absolute pressure when the flow
is “choked”, so the molbloc-S operating pressure can vary widely as the mass
flow rate is changed throughout the flow range. The limits of molbloc-S operating
pressure and flow ranges are defined by the molbloc-S calibration type,
described in Section 1.2.5.2.2.
New calibration data structure and premium calibration options for molbloc-S
were also introduced along with . molbloc-S elements produced with
this support will have serial number of 4000 or higher. Older molbloc-S elements
are eligible for upgrade to version 6.00 format by Fluke/DHI.
1.2
Specifications
1.2.1
General Specifications
Power Requirements
85 to 264 VAC, 50 to 60 Hz, 22 VA max. consumption
Fuse
1A/250V, slow blow, 5x20mm, NSN: 5920008930491
Operating Temperature Range
15 to 35 °C
Storage Temperature Range
- 20 to 70 °C
Vibration
Meets MIL-T-28800D
Weight
6.8 kg (15 lb) max.
Dimensions
32 cm W x 12 cm H x 30 cm D
(12.6 in. x 4.7 in. x 11.8 in.) approx.
Microprocessor
Motorola 68302, 16 MHz
Communication Ports
RS232 (COM1), RS232 (COM2), IEEE-488
Reference Pressure
Transducers(RPTs)
A350K
2 x 300 kPa (44 psia) calibrated range
oscillating quartz crystal
A700K
2 x 600 kPa (87 psia) calibrated range
oscillating quartz crystal
S A1.4M
1 x 1200 kPa (174 psia) calibrated range
oscillating quartz crystal, 1 x 300 psi silicon based
S A2M
1 x 2000 kPa (290 psia) calibrated range
oscillating quartz crystal, 1 x 300 psi silicon based
Pressure Limits
A350K
Maximum working pressure
300 kPa absolute (36 psia)
Maximum pressure without damage
350 kPa absolute (50 psia)
A700K
Maximum working pressure
600 kPa absolute (87 psia)
Maximum pressure without damage
700 kPa absolute (115 psia)
S A1.4M
Maximum working pressure
1200kPa absolute (203 psia)
Maximum pressure without damage
1500 kPa absolute (218 psia)
S A2M
Maximum working pressure
2000 kPa absolute (290 psia)
Maximum pressure without damage
2200 kPa absolute (320 psia)
Pressure Connections
Quick connectors equivalent to Swagelok
®
QM Series (M2-B200)
Ohmic Measurement System
Resolution
0.004
Ω
Accuracy
± 0.04
Ω
Accuracy of 100 and 110
Ω
reference resistors
± 0.01 %
Stability of 100 and 110
Ω
reference resistors
± 0.005 % per 3 yrs
