Samson Media 6 Service manual

Differential Pressure Meter
Media 6 with LCD
Media 6 with LED
Mounting and
Operating Instructions
EB 9527-1 EN
Firmware A 2.11 (LCD), B 2.11 (LED)
Edition July 2004
Fig. 1 ⋅Media 6 with LCD and attached valve block, Media 6 with LED (right)
LED

Contents Page
1 Design and principle of operation . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Arrangement of instruments . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Media 6 Indicating Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Valve block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Shut-off and equalizing valves . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 Accessories for connections . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Display and operating elements . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Changing over display mode for Media 6 with LCD . . . . . . . . . . . . . . 15
5Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1 Write protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Selecting the gas type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3 Checking zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 Checking measuring range (span) . . . . . . . . . . . . . . . . . . . . . . 19
6.5 Setting limit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.5.1 Max. limit for filling limit during operation . . . . . . . . . . . . . . . . . . 21
6.5.2 Alarms A1 and A2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.6 Ammeter function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Memory pen – communication . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1 Data transfer using memory pen . . . . . . . . . . . . . . . . . . . . . . . 24
7.2 Communication with PC . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9 Servicing explosion-protected versions . . . . . . . . . . . . . . . . . . . . 28
10 Dimensions in mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Type examination certificate . . . . . . . . . . . . . . . . . . . . . . . . . 30
Contents
2EB 9527-1 EN

Safety instructions
Assembly, commissioning and operation of the device may only be per-
formed by trained and experienced personnel familiar with this product.
According to these mounting and operating instructions, trained personnel
is referred to persons who are able to judge the work they are assigned to
and recognize possible dangers due to their specialized training, their
knowledge and experience as well as their knowledge of the relevant
standards.
Explosion-protected versions of this device may only be operated by per-
sonnel who have undergone special training or instructions or who are
authorized to work on explosion-protected devices in hazardous areas.
See section 9 for more details.
Any hazards which could be caused by the process medium and the oper-
ating pressure in the instrument are to be prevented by means of appropri-
ate measures.
Make sure that the instrument is only used where temperatures and operat-
ing pressure do not exceed the sizing data specified in the order.
The Media 6 Differential Pressure Meter is not certified for measuring
flammable gases or liquids in Zone 0 areas.
Proper shipping and appropriate storage are assumed.
Note! Devices with the CE mark meet the requirements specified in the
Directive 94/9/EC and the Directive 89/336/EEC.
The Declaration of Conformity can be viewed and downloaded on the In-
ternet at http://www.samson.de.
EB 9527-1 EN 3

Modifications in device firmware compared to the previous version
Previous version New version
A 2.03 / B 2.03 A 2.10 / B 2.10
Limit switches The limit switches A1 and A2 are configured over software as
minimum and maximum alarms.
They can be adjusted separately over the keys on the device.
Filling limit during oper-
ation The filling limit during operation UCW can be set over the keys on the device independently of the limit switches
A 2.10 / B 2.10 A 2.11 / B 2.11
Error code The current output of the Media 6 device is switched to
≥3.6 mA
4EB 9527-1 EN

Previous version New version
EB 9527-1 EN 5

1 Design and principle of operation
The Media 6 Differential Pressure Meters
measure and indicate the differential pres-
sure or measured variables derived from
the differential pressure. They are designed
for gases and liquids, for example, for liq-
uid level measurement in pressurized
vessels.
The measuring device consists of a dp cell
and an indicating unit. The cell has a
measuring diaphragm and measuring
springs designed for a certain measuring
span, and the indicating unit is equipped
with either an LCD (liquid crystal display) or
an LED (light-emitting diode) to indicate
important operating conditions.
The differential pressure ∆p = p1– p2acts
on the measuring diaphragm (1.1) which is
counterbalanced by the measuring springs
(1.2). The movement made by the measur-
ing diaphragm and lever (1.3) which is pro-
portional to the differential pressure is led
by the elastic disc (1.4) out of the pressure
chamber and converted by the displace-
ment sensor (2) into an electric signal.
This signal is compared with the data stored
in the EEPROM (4) and processed in the
microprocessor (3) which controls both the
display (7, LCD or LED) and the D/A con-
verter (9) for the output signal which is is-
sued at connector Aas a two-wire 4 to
20 mA transmitter signal.
The SERIAL INTERFACE (10) enables the
device to be configured using a special
memory pen or a connecting cable and a
PC with SAMSON’s TROVIS-VIEW Configu-
ration and Operator Interface.
The user-specific data is saved in the
EEPROM (4). Data can also be saved in this
manner and kept until it is overwritten
again. The operating data of Media 6 can
also be uploaded to the memory pen and
downloaded to the device on site.
The memory pen can be programmed on a
PC with the corresponding TROVIS-VIEW
software, using the operating data, e.g.
type of gas, gas density, tank design and
position of the limit switches. This data is
used to convert the differential pressure into
a value proportional to the tank contents
then used to display and issue the direct cur-
rent signal from 4 to 20 mA.
Four types of gas and various write protec-
tion functions for stored data can be se-
lected using the DIL switches (6).
Several operating functions (zero and span
calibration, filling limit during operation,
limit switches and test function settings, etc.)
as well as operating status (load/save oper-
ating values) can be set using three keys (5).
6EB 9527-1 EN
Design and principle of operation

Fig. 2 ⋅Functional diagram
0
20
40 60
80
100
%
m
3
#
7
6
5
3
2
1.1
1.2
9
8
10
1.5
4
1.4
1.3
1.2
1
p
2
p
1
_+
Connector A
UB= 12 to 36 V DC
IA= 4 to 20 mA
Min./max. alarm A1
Connector B
Min./max. alarm A2
µPEEPROM
SERIAL INTERFACE
Indicating unit with LCD or LED
1 Differential pressure cell
1.1 Measuring diaphragm
1.2 Measuring springs
1.3 Lever
1.4 Elastic disc
1.5 Diaphragm axis
2Displacementsensor
3 Microprocessor
4Memory
5Keys
6DILswitches
7 Indicating unit with
LCD or LED
8 Limit switch
9D/Aconverter
10 SERIAL INTERFACE
Valve block
with pressure
gauge
Differential
pressure cell
EB 9527-1 EN 7
Design and principle of operation

1.2 Technical data
Differential pressure meter
Nominal range mbar 0
to
100
0
to
160
0
to
250
0
to
400
0
to
600
0
to
1000 1)
0
to
1600 1)
0
to
2500
1)
0
to
3600 1)
Adjustable span mbar
Class ±1.0 % from
to ≤250
≥125 ≤400
≥100 ≤600
≥150 ≤1000
≥250 ≤1600
≥400 ≤2500
≥500 ≤3600
≥720
Class ±1.6 % from
to ≤100
≥60
< 160
≥60
< 125
≥50
< 100
≥80
< 150
≥120
< 250
≥200
Class ±2.5 % from
to < 60 ≥35 < 60 ≥32
from
to
< 35 2)
≥20
Nominal pressure PN 40, overloadable on one side up to 40 bar (PN 50 also for oxygen on request)
Display LCD Ø 90 or LED Ø 3
Performance Output and indication linear to tank capacity
Deviation from terminal-ba-
sed linearity
< ±1.6 % or < ±2.5 % (including hysteresis depending on the span selected)
Sensitivity < 0.25 % or < 0.5 % dependingon the span selected
Effect of
static pressure
ambient temperature
< 0.03 % / 1 bar
at –20 to 70 °C on zero and span: < ±0.25 %/10 K
Limit switches 2 software limit switches A1 and A2, configurable as minimum or maximum alarms
in accordance with NAMUR and EN 60947-5-6
Control circuit,
adjustable in 1% steps
Rating according to connected switching amplifier
acc. to NAMUR and EN 60947-5-6, e.g. KFA6- SR2- Ex2.W or KFA-SR2- Ex1.W
Hysteresis 1 % based on maximum tank capacity (MCN)
Range of inversion, approx. < 0.6 %
Weight without valve block
withvalveblock
Approx. 3 kg
Approx. 5 kg
1) A class accuracy of 0.6 % can be expected for measuring ranges 1000, 1600, 2500 and 3600 mbar with spans
≤100 % to ≥50 % of the nominal range.
2) The class accuracy of Class 2.5 may not be reached in cases where the span does not fall within this specified span.
Note: All pressures stated as gauge pressures. All errors and deviations stated in % of the adjusted span.
8EB 9527-1 EN
Technical data

Version 5006-0 5006-1
Output 4 to 20 mA
Permissible load
RB=US– 12 V
20 mA
Output current circuit Intrinsicallysafe(Media6 w. LCD/LED)
see PTB 00 ATEX 2074 in appendix
Supply voltage UB
two-wire transmitter
12 to 36 V DC 12 to 28 V DC only in combination
with an intrinsically safe circuit
Permissible ambient temperature – 40 to + 70 °C T6 max. + 60 °C
T5 max. + 70 °C
Permissible storage temperature –40 to +80 °C
Degree of protection IP 65 acc. to DIN VDE 0470 or EN 60529
Materials
Version Standard version
Enclosure Cu Zn 40 Pb CrNi steel
Measuring diaphragm and seals ECO/NBR (other materials on request)
Measuring springs
CrNi steel
Diaphragm plates and function. parts
Lever
Indicating unit Polycarbonate, polyamide
Note!
Devices intended for oxygen service are labeled "Oxygen! Keep free of oil and grease!"
These versions are cleaned and assembled by the manufacturer under special conditions.
Appropriate gloves need to be worn on replacing parts that come into contact with oxygen,
e.g. measuring springs.
When returning devices designed for oxygen service to the manufacturer for repair, the sen-
der assumes full responsibility that the handling of the devices to be repaired meets the re-
quirements specified in VBG 62 or equivalent regulations until the devices are handed over
to the manufacturer. Otherwise, SAMSON AG will not accept any responsibility.
EB 9527-1 EN 9
Technical data

2Installation
2.1 Arrangement of instruments
2.2 Media 6 Indicating Unit
Make sure that the high-pressure line is
connected to the high-pressure connec-
tion and the low-pressure line to the low-
pressure connection.
Note!
Special fittings are required to connect
measuring lines. In addition, depending on
the arrangement, connections left unused
must be fitted with plugs or venting screws
(see section 2.5 on accessories for more de-
tails).
Clean the connections carefully prior to
connecting the measuring lines. Do not
clean the instrument using compressed
air or pressurized water.
Secure the instrument at the place of in-
stallation to a pipe, wall or mounting
plate free of vibration.
For attachment to vertical or horizontal
pipes, use a mounting component with
clamp. For wall mounting, use a mount-
ing part without clamp. See the dimen-
sional drawing on page 29 for mounting
to control panels.
Note!
We recommend installing one shut-off valve
in each measuring line and, additionally,
an equalizing valve, or a SAMSON valve
block as a compact assembly.
Both measuring lines can then be shut off.
Additionally, the zero point can be checked
at the indicating unit by bypassing the
circuit.
2.3 Valve block
The three valves combined in a valve block
with test and pressure gauge connections
(Fig. 4), which are flanged directly onto the
bottom of the dp cell, are available as an
accessory.
2.4 Shut-off and equalizing valves
As an alternative to the SAMSON valve
block, both shut-off valves as well as the by-
pass valve/equalizing valve can also be in-
stalled as shown in Fig. 5.
hH
+–
Fig. 3 ⋅Arrangement for liquid level measurement,
e.g. diagram for the standard arrangement
in cryogenic applications
10 EB 9527-1 EN
Installation