Page 1
Differential Pressure Meter
Media 6 with LCD
Media 6 with LED
Fig. 1 ⋅ Media 6 with LCD and attached valve block, Media 6 with LED (right)
Mounting and
Operating Instructions
LED
EB 9527-1 EN
Firmware A 2.11 (LCD), B 2.11 (LED)
Edition July 2004
Page 2
Contents
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
2
EB 9527-1 EN
Page 3
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 appropriate measures.
Make sure that the instrument is only used where temperatures and operating 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 Internet at http://www.samson.de.
EB 9527-1 EN
3
Page 4
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 operation
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
4
EB 9527-1 EN
Page 5
Previous version New version
EB 9527-1 EN
5
Page 6
Design and principle of operation
1 Design and principle of operation
The Media 6 Differential Pressure Meters
measure and indicate the differential pressure or measured variables derived from
the differential pressure. They are designed
for gases and liquids, for example, for liquid 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 = p
on the measuring diaphragm (1.1) which is
counterbalanced by the measuring springs
(1.2). The movement made by the measuring diaphragm and lever (1.3) which is proportional to the differential pressure is led
by the elastic disc (1.4) out of the pressure
chamber and converted by the displacement 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 converter (9) for the output signal which is issued at connector A as a two-wire 4 to
20 mA transmitter signal.
– p2 acts
1
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 Configuration 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 current signal from 4 to 20 mA.
Four types of gas and various write protection functions for stored data can be selected 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 operating values) can be set using three keys (5).
6
EB 9527-1 EN
Page 7
Design and principle of operation
Indicating unit with LCD or LED
9
7
#
40
60
Connector A
= 12 to 36 V DC
U
B
= 4 to 20 mA
I
A
2
1.1
1.2
6
20
m3
0
5
3
%
µP
100
80
EEPROM
8
Min./max. alarm A1
Connector B
Min./max. alarm A2
SERIAL INTERFACE
10
4
1.4
Differential
pressure cell
Valve block
with pressure
gauge
_
p
2
+
p
1
1.3
1.5
1.2
1
1 Differential pressure cell
1.1 Measuring diaphragm
1.2 Measuring springs
1.3 Lever
1.4 Elastic disc
1.5 Diaphragm axis
2Displacement sensor
3 Microprocessor
4Memory
5Keys
6DIL switches
7 Indicating unit with
LCD or LED
8 Limit switch
9D/A converter
10 SERIAL INTERFACE
Fig. 2 ⋅ Functional diagram
EB 9527-1 EN
7
Page 8
Technical data
1.2 Technical data
Differential pressure meter
Nominal range mbar 0
100
1)
0
to
1600
0
to
to
160
0
to
250
0
to
400
0
to
600
0
to
1000
0
to
1)
2500
3600
1)
Adjustable span mbar
Class ± 1.0 % from
to
Class ± 1.6 % from
to
Class ± 2.5 % from
to
fromto< 35
≤ 100
≥ 60
< 60
≥ 35
≤ 2500
≥ 500
< 160
≥ 60
≤ 250
≥ 125
< 125
≥ 50
≤ 400
≥ 100
< 100
≥ 80
≤ 600
≥ 150
< 150
≥ 120
≤ 1000
≥ 250
< 250
≥ 200
≤ 1600
≥ 400
< 60
≥ 32
2)
≤ 3600
≥ 720
≥ 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-
< ±1.6 % or < ±2.5 % (including hysteresis depending on the span selected)
sed linearity
Sensitivity < 0.25 % or < 0.5 % depending on the span selected
0
to
1)
Effect of
static pressure
ambient temperature
at –20 to 70 °C on zero and span: < ±0.25 %/10 K
< 0.03 % / 1 bar
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
acc. to NAMUR and EN 60947-5-6, e.g. KFA6- SR2- Ex2.W or KFA-SR2- Ex1.W
Rating according to connected switching amplifier
Hysteresis 1 % based on maximum tank capacity (MCN)
Range of inversion, approx. < 0.6 %
Weight without valve block
with valve block
1)
A class accuracy of 0.6 % can be expected for measuring ranges 1000, 1600, 2500 and 3600 mbar with spans
Approx. 3 kg
Approx. 5 kg
≤ 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.
8
EB 9527-1 EN
Page 9
Technical data
Version 5006-0 5006-1
Output 4 to 20 mA
Permissible load
– 12 V
U
S
=
R
B
20 mA
Output current circuit Intrinsically safe (Media 6 w. LCD/ LED)
see PTB 00 ATEX 2074 in appendix
Supply voltage U
two-wire transmitter
Permissible ambient temperature
Permissible storage temperature
Degree of protection IP 65 acc. to DIN VDE 0470 or EN 60529
Materials
Version
Enclosure
Measuring diaphragm and seals
Measuring springs
Diaphragm plates and function. parts
Lever
Indicating unit
B
12 to 36 V DC 12 to 28 V DC only in combination
with an intrinsically safe circuit
– 40 to + 70 °C T6 max. + 60 °C
T5 max. + 70 °C
–40 to +80 °C
Standard version
Cu Zn 40 Pb CrNi steel
ECO/NBR (other materials on request)
CrNi steel
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 sender assumes full responsibility that the handling of the devices to be repaired meets the requirements 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
Page 10
Installation
2Installation
H
h
Fig. 3 ⋅ Arrangement for liquid level measurement,
e.g. diagram for the standard arrangement
in cryogenic applications
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 mounting part without clamp. See the dimensional 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.
2.1 Arrangement of instruments
2.2 Media 6 Indicating Unit
Make sure that the high-pressure line is
connected to the high-pressure connection and the low-pressure line to the lowpressure 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 details).
10
EB 9527-1 EN
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 bypass valve/equalizing valve can also be installed as shown in Fig. 5.
Page 11
Installation
2.5 Accessories for connections
Open product connections are protected
against contamination by means of NBR
plugs.
Required screw fittings, plugs, venting
screws and screw joints with restrictions
used to dampen vibrations caused by the
process medium (especially when measuring gases) must be ordered separately.
Media 6
The screw fittings and SAMSON valve
blocks are listed together with their order
numbers in the Data Sheet T 9555 EN.
1Shut-off valve
2 Equalizing valve
Test connection
Shut-off valve (-)
Pressure gauge
connection
Fig. 4 ⋅ SAMSON valve block
Connection for
measuring lines
–+
Equalizing valve
(lead-sealable)
Bore hole for
sealing wire
Shut-off valve (+)
Fig. 5 ⋅
From the point of measurement
1
2
To indicating unit
Shut-off and equalizing valves, separate or
combined in a three-way or five-way valve block
EB 9527-1 EN
11
Page 12
Electrical connection
3 Electrical connection
As far as the electrical installation of
the device is concerned, the relevant
national regulations governing the
installation of electrical equipment
and the national accident prevention
regulations of the country of destination must be adhered to. In Germany, these are the VDE regulations
and accident prevention regulations
of the employer’s liability insurance.
For assembly and installation in hazardous areas, the following standards apply: EN 60079-14: 1997;
VDE 0165 Part 1/8.98 "Electrical
apparatus for explosive gas areas"
and EN 50281-1-2: VDE 0165 Part
2/11.99 "Electrical apparatus for use
in the presence of combustible dust."
For intrinsically safe electrical apparatus that are certified according
to the Directive 79/196/EEC, the
data specified in the certificate of
conformity apply for connection of
intrinsically safe circuits.
For intrinsically safe electrical apparatus that are certified according
to the Directive 94/9/EC, the data
specified in the EC type examination
certificate apply for connection of intrinsically safe circuits.
Note: It is absolutely necessary to
keep to the terminal plan specified
in the certificate. Reversal of the electrical connections may cause the explosion protection to be ineffective!
Do not tamper with screws inside or
on the case which have been sealed
with paint.
Note on the selection of cables and wires:
To run several intrinsically safe circuits in a
multi-core cable, read paragraph 12 of EN
60079-14; VDE 0165/8.98.
For generally used insulating materials, for
example polyethylene, the radial thickness
of the conductor insulation has to be at least
0.2 mm.
The diameter of a single wire in a flexible
conductor shall not be smaller than 0.1 mm.
The conductor ends are to be protected
from unlaying, e.g. by using wire end ferrules.
12
EB 9527-1 EN
Page 13
Electrical connection
Connector A
Two-wire connection for current signal
4 to 20 mA,
perm. load = (U
– 12 V)/0.020 A [Ω].
S
The supply voltage is usually 24 V DC. It
may be between at least 12 and maximum
36 V DC while considering the supply
lead’s resistance directly at the connecting
terminals of the connector.
Connector B
Connection for 2 software limit switches in
type of protection "Intrinsic Safety"
EEx ia IIC for control circuits conforming
with NAMUR to switching amplifiers as per
EN 60947-5-6.
Maximum values:
U
= 20 V
i
I
= 60 mA
i
P
= 250 mW
i
C
= 5.3 nF
i
L
= Negligible
i
Test connection
An ammeter can be connected to the test terminals + and − for checking the output
signal on calibration. The output signal of
the two-wire circuit is not interrupted. Make
sure that there is a load of < 0.4 V DC at
the ammeter for the test connection.
Caution!
If the cable socket is removed from the connector, the degree of protection IP 65
becomes ineffective!
Protect the connector from moisture during
installation work and transport by keeping
the cable socket part screwed on and
sealed!
1
3
2
Limit switches with switching amplifiers
min/max A1
1
3
4
2
min/max A2
Fig. 6 ⋅ Terminal assignment of DIN 43650 connectors, form A
1+
2–
1+
2–
3+
4–
Supply unit
~
Power
supply
Connector A
Cable socket
Order No.: 8831-0503
Connector connections for
cable ø 8 to 10 mm
Connector B
Cable socket
Order No.: 8831-0500
EB 9527-1 EN
13
Page 14
Operation
4Operation
Alarm A1
flashing
Interface
Open
equalizing valve
Tank I D
Tank capacity % Gas type and operating status Factor
Tank designation
x1000
60
80
SERIAL
INTERFACE
40
20
Off
3
m
SWITCHES
1·2 GAS SELECTION
3 ON·SPAN
4 ON·WRITE
PROTECTION
}
1
2
0
ON
OFF
4
3
%
100
TEST
–+
Alarm A2
flashing
UCWflashing
Tank capacity
MCN, SCN,
UCW,
diff. pressure and
error code
Unit of quantity,
tank capacity
and ∆ p
Nom. perm.
capacity SCN
DIL switches Up key Down key Enter key Test connection
Ar
O
2
N
2
CO
Fig. 7 ⋅ Indicating unit with LCD (top) and LED (bottom)
Span: Start - Value End - Valvue
XX,X mbar... XXXX,X mbar
XX,X mbar... XXXX,X mbar
XX,X mbar... XXXX,X mbar
XX,X mbar... XXXX,X mbar
2
Light-emitting diode
Plug-in plate
for gas types and measuring
ranges
Note!
A quick guide is located behind the
plug-in plate of Media 6 with LED.
14
EB 9527-1 EN
Page 15
Operation
4.1 Display and operating elements
All the necessary information and measured
values stored in the instrument’s memory
are shown in the display of Media 6 with
LCD. Although the Media 6 with LED version does not have such a digital display,
important operating conditions are indicated by the LED.
Three keys are used to operate the differential pressure meter:
Up key
Down key
Enter key
and a DIL switch with four switches to select
the type of gas and write protection function.
4.1.1 Changing over display mode
for Media 6 with LCD
Press the key to change over from the
standard display to seven other display
modes.
After 8 seconds or after the message has finished running across the display, the display returns automatically to the standard
display.
O2 e.g. gas name and current tank
content
∆P current differential pressure
MCN maximum capacity nominal
MCN/R 100 % capacity assigned to
20 mA signal
SCN save capacity nominal
geometric capacity up to overflow/
gauge pipe
SCN/R 100 % capacity assigned to
20 mA signal
UCW useable capacity work
∆P100 maximum differential pressure
PTANK nominal tank pressure
Indicated value corresponds to the
pressure assigned to the density
as per vapor pressure diagram.
If the calculations for MCN and SCN
are based on density
abs, then 1 bar is shown for PTANK.
(liquid)
(liquid)
at 1 bar
X-TANK-16 e.g. tank ID as running text
ERROR error message displayed auto-
matically when an error occurs
(see section 8 on troubleshooting).
OFF Special signal on opening the
equalizing valve, I = 3.6 mA
(refer to EB 9527-2, page 7).
EB 9527-1 EN
15
Page 16
Setting
5Start-up
1. Open the equalizing valve.
2. Slowly open the high-pressure line.
3. Close the equalizing valve or the bypass of the valve block.
4. Open the low-pressure line.
Note!
Carry out, if necessary, a zero point check
at the dp cell as described in section 6.3,
and restart the instrument.
6 Setting
6.1 Write protection
The instrument has two write protection functions:
WRITE PROTECTION
to prevent the operating data from being
changed unintentionally.
SPAN PROTECTION
as an additional write protection for the
span setting.
The write protection at switch 4 of the DIL
switch must first be switched OFF before
various operating functions can be carried
out and switched ON again afterwards.
6.2 Selecting the gas type
The desired gas type can be selected using
the positions of switches 1 and 2 according
to the table and figure below.
Gas 1 1 OFF 2 OFF
Gas 2 1 ON 2 OFF
Gas 3 1 OFF 2 ON
Gas 4 1 ON 2 ON
ON
OFF
1
2
Gas type
Fig. 8 ⋅ DIL switch with switches 1 to 4
4
3
Write protection
Span protection
16
EB 9527-1 EN
Page 17
Setting
Media 6 with LCD
The gas formula of the gas chosen, e.g.
AR, CO2, O2, N2, etc. appears in the
display.
Select the gas type according to the
table using the DIL switch.
The display is not activated, just the selected
gas is shown!
Press key to confirm the new gas type.
The display is activated.
Media 6 with LED
The four selectable gas types are listed
downward from 1 to 4 or specified by
means of their designation on the plug-in
plate. Use the switches 1 and 2 of the DIL
switch to select the gas type, also refer to
the table and Fig. 8 on page 16. The gas
type selected is indicated by the number of
short flashes.
Gas 1: pause - 1 flash - pause etc.
Gas 2: pause - 2 flashes - pause etc.
Gas 3: pause - 3 flashes - pause etc.
Gas 4: pause - 4 flashes - pause etc.
6.3 Checking zero
When the zero is checked, the pressure
must be equal in both measuring chambers
at atmospheric pressure.
At a differential pressure of ∆p = 0 mbar,
the current signal at connector A or at the
TEST connection must be 4 mA.
(See test arrangement in Fig. 9.)
Note!
When activating the gas column correction
(refer to section 2.2.3 in EB 9527-2 EN), it
is important to take into account that the
gas columns in the measuring lines reduce
the differential pressure as they have an opposing effect on each other.
At a pressure equilibrium of ∆p = 0 mbar,
the meter readout is negative for the tank
capacity and the output signal indicates a
value < 4 mA.
In this case, readjust the zero point as described in following so that the display indicates 0 % = 0000 when ∆p = 0 mbar. The
output signal changes, but indicates a value
< 4 mA in accordance with the gas column
correction data.
Press key to confirm the new gas type.
The LED goes out.
Media 6 with LCD
At a differential pressure of ∆p = 0 mbar,
the display must indicate 0 % or 0000.
Correction when the tank is empty
Write protection: turn switch 4 OFF.
Press and hold down key. ZERO and
X,0X mbar appear in the display.
Current signal I shows the present mA value.
Press key, zero point is adjusted.
EB 9527-1 EN
17
Page 18
Setting
Release key, 0 mbar appears in the
display. Current signal I = 4 mA.
Activate the write protection: turn switch
4 ON.
Correction when the tank is filled
If the differential pressure lines are
equipped with shut-off and equalizing
valves, zero can be checked even when the
plant is in operation.
To achieve this, place the valve block or
equalizing valve in the test position to obtain the same pressure in both measuring
chambers.
1. Close the shut-off valve in the highpressure line.
2. Open the equalizing valve or bypass in
the valve block.
3. Close the shut-off valve in the lowpressure line.
The valve block is in test position!
Write protection: turn switch 4 OFF.
Press and hold down key. ZERO and
X,X mbar appear in the display.
Current signal I indicates the present
mA value.
Press key. Zero is adjusted.
Release key, 0 mbar appears in the
display.
Current signal I = 4 mA corresponding to
the liquid level at 0 mbar differential
pressure.
(See note on gas column correction on page 17.)
Activate the write protection:
turn switch 4 ON.
Return valve block or equalizing valve to
operating position:
1. Open the shut-off valve in the lowpressure line.
2. Close equalizing valve.
3. Open the shut-off valve in the highpressure line.
Caution! For devices used to measure oxygen, the test medium must be free of oil
and grease!
Supply air reducing station
with oil filter and pressure
gauge
Fig. 9 ⋅ Test arrangement
18
EB 9527-1 EN
60
40
x1000
20
Off
0
80
3
m
%
100
–+
–+
Use air free of oil or other gases,
, only
Tes t pr es su re
Precision regulator with pressure gauge Cl. 0.1
e.g. N
2
Ammeter
Supply unit
+
–
.
~
Power
supply
Page 19
Setting
Media 6 with LED
According to the test arrangement, a current signal of 4 mA must be supplied at connector A or at the TEST connection at a differential pressure of ∆p = 0 mbar.
Correction when the tank is filled
1. Close the shut-off valve in the highpressure line.
2. Open the equalizing valve or bypass in
the valve block.
3. Close the shut-off valve in the lowpressure line.
The valve block is in test position!
Write protection: turn switch 4 OFF.
Press and hold down key. LED starts to
flash rapidly. Current signal I indicates
the present mA value.
Press key. Zero is adjusted.
6.4 Checking measuring range (span)
A basic calibration with a linear characteristic based on the upper range value of
the dp cell has been made at the factory (default). Using the entered tank and gas data,
the instrument adopts the tank characteristic
and calculates values proportional to the
tank capacity to indicate and issue the output signal from 4 to 20 mA using the gas
data for the gas selected.
In exactly the same way, the differential
pressure meter calculates the maximum
possible differential pressure ∆p 100 in
mbar for each type of gas and the predetermined reference height (total height or
gauge pipe). The output signal of 20 mA
must correspond to ∆p 100.
Connect the differential pressure meter as
shown in Fig. 9 to check the measuring range.
Current signal I = 4 mA corresponding
tothe liquid level at 0 mbar differential
pressure. For gas column correction,
the following applies: I < 4 mA.
(See also the note on gas column correction
on page 17.)
The LED flashes continuously for ~ 2 s.
Release key.
Return valve block or equalizing valve to
operating position:
1. Open the shut-off valve in the lowpressure line.
2. Close the equalizing valve.
3. Open the shut-off valve in the highpressure line, the LED goes off.
Activate the write protection: turn switch
4 ON.
Note!
It is useful to activate the gas with the largest density to adjust the span. The values
for gases with smaller densities are also calibrated with this calibration procedure.
Important!
To calibrate the gas currently available, its
indicated value must be at least 85 % of the
adjusted upper range value of ∆p 100.
Note!
The span calibration is protected (switch 3)
to prevent the span from being adjusted by
incorrect operation.
EB 9527-1 EN
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Page 20
Setting
Media 6 with LCD
Checking the measuring range (span)
If the key is pressed five times, ∆p100,
which is the value for the maximum differential pressure, appears in the display.
First check zero, as described in section
6.3.
Press key five times,
Readout: ∆p 100 = X.XXX ( x1000 ) mbar.
Use a precision regulator to apply a test
pressure corresponding to the maximum
differential pressure ∆p 100 while monitoring the pressure gauge.
Set point values: ∆p = 0 mbar = 4 mA
(See also note on gas column correction on p. 17)
∆p 100 = XXXX mbar = 20 mA
If the readout and output signal do not
correspond with the indicated value ∆p100,
the upper range value of the measuring
range (span) must be calibrated.
Calibrating the measuring range (span)
First check zero, as described in section
6.3.
Turn write protection (switch 4) and span
protection (switch 3) OFF.
Press key five times.
Readout: ∆p 100 = X.XXX ( x1000 ) mbar.
Use a precision regulator to apply a test
pressure corresponding to the maximum
differential pressure ∆p 100 while monitoring the pressure gauge.
Keep key pressed down, the current
measured value is shown in the display.
Current signal I shows the present mA
value.
Press key, the span is calibrated,
current signal goes to 20 mA.
Readout
Release key.
Turn write protection (switch 4) and span
protection (switch 3) ON.
^
∆p 100.
=
Media 6 with LED
Checking the measuring range (span)
First check zero, as described in section
6.3.
Use a precision regulator to apply a test
pressure corresponding to the maximum
differential pressure ∆p 100 while monitoring the pressure gauge.
Set point values: ∆p = 0 mbar = 4 mA
(See also note on gas column correction on p. 17)
∆p 100 % = XXXX mbar = 20 mA
If the output signal I does not correspond
with the value ∆p100 %, the upper range
value of the measuring range (span) must
be calibrated.
Calibrating the measuring range (span)
Turn write protection (switch 4) and span
protection (switch 3) OFF.
Use a precision regulator to apply a test
pressure corresponding to the maximum
differential pressure ∆p 100 while monitoring the pressure gauge.
Keep key pressed down, current signal I
shows the present mA value.
LED starts to flash rapidly.
Press key, the span is calibrated,
current signal goes to 20 mA,
The LED flashes continuously for ~ 2 s.
Release key, the LED goes out.
20
EB 9527-1 EN
Page 21
Setting
Turn write protection (switch 4) and span
protection (switch 3) ON.
6.5 Setting limit switches
6.5.1 Max. limit for filling limit dur-
ing operation
Note! The filling limit during operation set
over the software can only be changed over
the keys in the Media 6 version with LCD.
UCW Marker
Turn write protection (switch 4) OFF.
Press and hold down key until after 8 s
UCW appears at the top of the display
and underneath the associated % value.
Press key to confirm the display.
Press to reduce the value in steps of 1 %
or
Press to increase the value.
Press key to confirm new setting.
Turn write protection (switch 4) ON.
6.5.2 Alarms A1 and A2
Media 6 with LCD
Alarm A1 and A2 markers
Both limit switches are already set over the
software either as min. or max. contacts.
A1MIN or A1MAX as well as A2MIN or
A2MAX appear in the display.
Both limit switches must be set and confirmed separately.
Turn write protection (switch 4) OFF.
Press and hold down key until after 8 s
UCW appears at the top of the display.
or needs to be pressed to switch
between alarm A1 or A2.
Press key to confirm selected alarm.
Press to reduce the value in steps of 1 %
or
Press to increase the value.
Press key to confirm new setting.
Press and hold down key again until
after 8 s UCW appears at the top of
the display.
or needs to be pressed to switch over
to the second alarm that needs to be set.
Confirm selected alarm and set as
described above.
Turn write protection (switch 4) ON.
EB 9527-1 EN
21
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Setting
Media 6 with LED
Connect an ammeter to the power supply at
connector A (Fig. 9) or to the TEST terminal.
Both limit switches are already set over the
software as either min. alarm or max.
alarm and are displayed to the assigned differential pressure corresponding to a current between 4 and 20 mA.
Both alarms need to be set and confirmed
separately.
Turn write protection (switch 4) OFF.
Alarm A1
Press and hold down key until after 8
seconds the LED flashes slowly.
Press key to display the currently set
A1 alarm at the ammeter. The LED lights
up.
Alarm A2
Press and hold down key until after 8
seconds the LED flashes slowly.
or needs to be pressed to switch over
to A2 alarm which flashes more quickly.
Press key to confirm the selected alarm.
The LED lights up.
The currently set A2 alarm is indicated
at the ammeter.
Press to reduce the value in steps of 1 %
or
Press to increase the value.
Press key to confirm new setting. The
LED goes off.
Turn write protection (switch 4) ON.
Press to reduce the value in steps of 1 %
or
Press to increase the value.
Press key to confirm new setting. The
LED goes off.
22
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Page 23
Setting
6.6 Ammeter function
In order to check the functioning of connected devices, an output signal of 4 to 20
or 22.8 mA can be adjusted for a short
time regardless of the current liquid level in
the tank.
Media 6 with LCD
Write protection: turn switch 4 OFF.
4 mA ammeter
Press and hold down key.
Press within 8 seconds and hold down,
output signal I = 4.0 mA.
Release to change the signal between
4.0 mA and 22.8 mA.
Release key, current signal I indicates
the mA value corresponding to the tank
capacity.
20 mA ammeter
Media 6 with LED
Write protection: turn switch 4 OFF.
4 mA ammeter
Press and hold down key.
Press within 8 seconds and hold down,
output signal I = 4.0 mA, signaled by
rapid flashing of the LED.
Press to change the signal between
4.0 mA and 22.8 mA (LED on).
Release key, current signal I indicates
the mA value corresponding to the
tank capacity (LED off).
20 mA ammeter
Press and hold down key.
Press within 8 seconds and hold down,
output signal I = 20.0 mA, signaled by
slow flashing of the LED.
Press to change the signal between
20.0 mA and 22.8 mA (LED on).
Press and hold down key.
Press within 8 seconds and hold down,
output signal I = 20.0 mA.
Release to change the signal between
20.0 mA and 22.8 mA.
Release key, current signal I indicates the
mA value corresponding to the tank
capacity.
Write protection: turn switch 4 ON.
Release key, current signal I indicates the
mA value corresponding to the tank
capacity. The LED goes out.
Write protection: turn switch 4 ON.
EB 9527-1 EN
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Memory pen – communication
7 Memory pen – communication
7.1 Data transfer using memory pen
The memory pen is a portable data carrier.
Via the SERIAL INTERFACE, it transfers
standardized data which corresponds with
the type of tank and the relevant gas data
to Media 6 instruments on site without requiring a PC or a notebook to be connected.
A label tag can be attached to the memory
pen for identification.
The customized data is transferred to the
memory pen from a PC/notebook using the
TROVIS-VIEW Configuration and Operator
Interface (see EB 9527-2 EN) or the data
can be copied from another Media 6 instrument.
The memory pen can be configured to write
and read, only read or only write depending on the status determined by TROVISVIEW, see table below:
Note!
Memory pens with sets of data or existing
configurations which were created with earlier TROVIS-VIEW software versions (1.02
to 2.20) are not 1:1 compatible with
Media 6 devices with firmware versions
A 2.10 or B 2.10.
They must first be loaded and converted
over TROVIS-VIEW software version (2.30
or higher).
Memory pens must be configured to suit the
Media 6 firmware version.
Media 6 with LCD
Data transfer from Media 6 to memory pen
(write) and from memory pen to Media 6
(read).
Status "write and read"
Insert memory pen into the SERIAL INTER-
FACE connector.
MEMWR appears at the top of the display.
or has to be pressed
to switch between
MEMWR = Media 6 writes data to
the memory pen and
Memory
pen status
Write and
read
Read only MEMRD Short flashes Media 6 only reads data from the memory
Write only MEMWR Long flashes Media 6 only writes data to the memory pen.
24
EB 9527-1 EN
LCD:
indication
MEMWR
or
MEMRD
LED:
flashing signal
Long flashes
= writing,
short flashes =
reading
Process
Media 6 writes data to the memory pen or
reads data from the memory pen.
pen.
Page 25
Memory pen – communication
MEMRD = Media 6 reads data from the
memory pen.
MEMRD write protection: turn switch 4
OFF.
Press key to activate selection.
RUN appears in the display,
when DONE appears, the data is saved
and the memory pen can be removed.
MEMRD write protection: turn switch 4 ON.
Data transfer from memory pen to Media 6
Status "read only"
Write protection: turn switch 4 OFF.
Insert memory pen into the SERIAL INTER-
FACE connector.
MEMRD appears at the top of the display.
Press key to start the reading process.
RUN appears in the display,
when DONE appears,
the data is saved in Media 6, the
memory pen can be removed.
Write protection: turn switch 4 ON.
Data transfer from Media 6 to memory pen
Status "write only"
Insert memory pen into SERIAL INTER-
FACE connector.
MEMWR appears at the top of the display.
Press key to start the writing process.
RUN appears in the display,
when DONE appears, the data is saved
in the memory pen, the memory pen
can be removed.
Media 6 with LED
Data transfer from Media 6 to memory pen
(write) and from memory pen to Media 6
(read).
Status "write and read"
Insert memory pen into the SERIAL INTER-
FACE connector.
Short flashing of the LED indicates that
Media 6 reads data from the memory pen
and long flashing means that Media 6
writes data to the memory pen.
or has to be pressed to switch
between the functions Media 6 writes
data to memory pen and Media 6 reads
data from memory pen.
When selecting the function
Media 6 reads data from memory pen:
turn switch 4 OFF.
Press key to activate selection,
the LED is on.
When the LED goes off, remove the
memory pen.
Write protection: turn switch 4 ON.
Data transfer from memory pen to Media 6
Status "read only"
Write protection: turn switch 4 OFF.
Insert memory pen into SERIAL INTER-
FACE connector.
The LED signals short flashes.
Press key to start the reading process,
the LED is on.
When the LED is off, remove the
memory pen.
Write protection: turn switch 4 ON.
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Troubleshooting
Data transfer from Media 6 to memory pen
Status "write only"
Insert the memory pen into the SERIAL
INTERFACE connector.
The LED signals long flashes.
Press key to start the writing process,
the LED is on.
When the LED goes out, remove the
memory pen.
7.2 Communication with PC
Media 6 can also be operated via the
SERIAL INTERFACE from a PC/notebook
using the TROVIS-VIEW Configuration and
Operator Interface.
Refer to the Mounting and Operating
Instructions EB 9527-2 EN for operation.
8 Troubleshooting
Errors that occur are reported in the upper
part of the LC display with the word ERROR
and below with an error code, e.g. 16.
The type of flashing sequence signals the
error code of Media 6 with LED. Thus, error
code 1 is signaled as follows:
long medium 9x short
Refer to the table on page 27 for the description of the error codes.
Reset or acknowledge errors by pressing
the key.
Any new error messages then remain suppressed for 8 seconds.
Troubleshooting using the memory pen
If you have a SAMSON memory pen, it can
be used, if necessary, to upload new data
to the instrument within the 8 seconds.
Troubleshooting using a PC or notebook
Communication with a PC or notebook via
the SERIAL INTERFACE functions even in the
error mode.
Hardware errors
These errors are saved in the EEPROM and
reset via the SERIAL INTERFACE after repair
at the manufacturer’s.
Calibration and measuring range error or
error in the tank characteristic
You can only exit the error mode by resetting.
If necessary, new data must first be read
into the device (see section 7.1).
26
EB 9527-1 EN
Page 27
Error code Description Corrective measure
LCD: number LED: flashing sequence
Hardware error
Troubleshooting
1 1x long/1x medium/
9x short
2 1x long/1x short/
1x medium/8x short
4 1x long/2x short/
1x medium/7x short
Calibration error, measuring range error or error in tank characteristic
8 1x long/3x short/
1x medium/6x short
16 1x long/4x short/
1x medium/5x short
32 1x long/5x short/
1x medium/4x short
Other errors
Oscillating circuit or differential
inductor defect
RAM checksum error, RAM is defect Send device to SAMSON for repair
EEPROM checksum error Send device to SAMSON for repair
∆p not within permissible range.
The permissible range is 20 to 110 %
of the nominal range of the dp cell.
Error in the tank characteristic It is imperative that the co-ordinates
Calibration ∆p sensor.
The zero or span calibration
produces values that exceed the
permissible limits. These values are
not saved in EEPROM.
Send device to SAMSON for repair
Reset error and load other tank or gas
data, or use appropriate dp cell.
for the tank characteristic increase
strictly monotonically.
Check zero and span calibration. On
doing so, pay attention to the ∆p.
If the fault remains, send device to
SAMSON for repair.
64 1x long/6x short/
1x medium/3x short
128 1x long/7x short/
1x medium/2x short
256 1x long/8x short/
1x medium/1x short
512 1x long/9x short/
1x medium
Note:
Error codes might refer to an error addition and therefore two error codes might be displayed as one code:
e.g. ERROR 24 => error code 8 and error code 16.
When an error code is displayed, the current output of the Media 6 device is switched to ≥ 3.6 mA.
Error in FP arithmetic. Check tank or gas data.
Memory pen invalid.
The memory pen ID is incorrect or
faulty. The pen cannot be read,
however, writing to the pen is possible.
Error in checksum memory pen. Acknowledge error and rewrite or
Error during RS 232 communication.
The USART has recognized an error,
or there is a buffer overflow.
Use memory pen suitable for Media 6.
reread memory pen. If the error
continues to occur, the memory pen
must be replaced.
Acknowledge error and check
communication.
EB 9527-1 EN
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Page 28
Servicing explosion-protected versions
After acknowledging using the key,
8 seconds remain until a new error message can appear.
The short time interval is long enough to
start the transfer of new data from the memory pen.
The instrument is automatically reset on removing the memory pen.
With communication using a PC or notebook, the instrument is automatically reset
after the data is transferred.
Other errors
These errors must be acknowledged by
pressing the key to allow the instrument
to continue working.
9 Servicing explosion-protected
versions
In the event that a component of the Media
6 on which the explosion protection is
based must be serviced, the instrument must
not be put back into operation again until
an expert has inspected the device according to explosion protection requirements,
has issued a certificate stating this, or given
the device a mark of conformity.
Inspection by an expert does not have to be
carried out, if the manufacturer performs a
routine check test on the device prior to taking it into operation again, and the success
of the routine check test is documented by
attaching a mark of conformity to the device.
Explosion-protected components may only
be replaced by original checked components from the manufacturer.
28
EB 9527-1 EN
Page 29
10 Dimensions in mm
141.5
37
80
Pressure sensor acc.
to manufacturer
Control panel
Dimensions in mm
194
180.5
32.5148
Pressure gauge acc.
to manufacturer
A
M8
121114.5
B
20
60
40
80
m3
100
0
%
245.5
158.5 72
145.8 58
117
25.5
43
31
60
80
Pressure gauge connections:
For pressure gauge NG 100:
male thread G1/2 B-LH with coupling sleeve G1/2
30
DIN 16 283 and O-ring 12x2
For pressure gauge NG 63:
female thread G1/4 with seal
158 17
3054
Two bore holes ø 8.5 mm for attachment to measuring chamber rear side
to fit M8 screws
Two bore holes ø 8.5 mm for
attachment to the valve block
EB 9527-1 EN
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30
EB 9527-1 EN
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EB 9527-1 EN
31
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32
EB 9527-1 EN
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EB 9527-1 EN
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Page 34
SAMSON AG ⋅ MESS- UND REGELTECHNIK
Weismüllerstraße 3 ⋅ 60314 Frankfurt am Main ⋅ Germany
Phone: +49 69 4009-0 ⋅ Fax: +49 69 4009-1507
Internet: http://www.samson.de
EB 9527-1 EN
S/Z 2004-10
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