Comark 3392-PG Installation Manual

C9550 EXTERNAL

PRESSURE METER

OPERATING MANUAL

1

CONTENTS

GENERAL INFORMATION ...................... 3

CALIBRATION, CERTIFICATION

AND SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 Transducer Input . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Transducer Operator Manual .................6

1.3 Transducer Range Data Sheet ...............6

1.4 Ranges, scales and resolutions ...............6

2 KEY FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 ON/OFF Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 ZERO Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 SCALE Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 HOLD Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5 FILTER Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.6 RECORD Key . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.7 AUTO Switch Off . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 PRESSURE SOURCE CONNECTION . . . . . . . 9

4 OTHER FUNCTIONS .................... 10

4.1 Battery Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.2 Over 9999 Reading Indication ...............10

4.3 Absolute or Gauge Measurement . . . . . . . . . . . . 10

4.4 Error Messages ..........................10

4.5 Battery Replacement ......................11

5 UNITS OF MEASUREMENT .............. 12

5.1 The C9550 Pressure Scaling System . . . . . . . . . 12

5.2 Calibration Scale . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 3. Scale Conversion Factors ...............13

5.3 Table of Full Scale Pressures

and Resolutions . . . . . . . . . . . . . . . . . . . . . . . . . 14

1

6 OPTIONAL EQUIPMENT . . . . . . . . . . . . . . . . 15

7. WIRING OF INTERFACE CABLE .......... 16

8. INSTRUMENT SPECIFICATION ........... 17

Declaration of Conformity . . . . . . . . . . . . . . . . . . 18

FIGURE 1 View of the measurement system . . . . . . . . 19

2

GENERAL INFORMATION

TRANSDUCERS SHOULD NOT BE DISCONNECTED FROM THE

WARNING

PRESSURE SOURCE WHILST CONTAINING GASES WHICH ARE
DANGEROUS AND/OR UNDER PRESSURE.

DO NOT APPLY PRESSURES BEYOND THE OVER RANGE MAXI­MUM FOR THE TRANSDUCER OR DAMAGE WILL OCCUR.

REFER TO SECTION 3 - CONNECTION TO PRESSURE SOURCES
BEFORE OPERATING THE INSTRUMENT.

TO AVOID ELECTRIC SHOCK DO NOT ALLOW ANY TRANSDUCER
OR CABLE TO COME INTO CONTACT WITH LIVE ELECTRICAL
POWER CONDUCTORS WITH VOLTAGES IN EXCESS OF 30V AC
RMS OR 60V DC.

CAUTION
Pressure Transducers
This precision instrument has been designed for use with the
extensive range of Comark pressure transducers. The use of
other transducers may impair the performance and accuracy of the
instrument. Full details of Comark transducers may be obtained
from Comark Customer Support department or your local distribu­tor.

Repeated sharp exing can break transducer connection cables.

To prolong lead life, avoid sharp bends or kinks in the leads, espe­cially near the connectors.

This instrument is manufactured in
accordance with the company’s ISO 9001 Quality
Approved System.

CERTIFICATE No. FM29700

This instrument complies with the Electromagnetic
Compatibility Directive EN61326-1:2006.

Declarations of Conformity available. Contact
Comark Customer Support or your local Distributor.

In line with its policy of continuous development, Comark Limited reserves the

right to alter the instrument specication without prior notice. Further information

is available from Comark Limited or your distributor.

3

CALIBRATION, CERTIFICATION AND SERVICE

Certication

Comark can provide certicates of calibration for its whole product

range, to suit ISO 9000 and other quality assurance procedures, food
hygiene regulations, HACCPs and environmental regulations. Comark

certicates are produced by independent quality controlled processes

which compare product performance against agreed National Stand­ards. For peace of mind and best practice Comark recommend annual

certication/recalibration.

Two levels of certication are available for infra-red temperature and
non temperature instruments, excluding humidity:- UKAS certicates via
an external accredited laboratory and NPL traceable certicates from

the Comark calibration laboratory.

Three levels of certication are available for contact temperature and

humidity products and these are detailed here:

a) UKAS Temperature Certication

The Comark UKAS (United Kingdom Accreditation Service)

accredited temperature calibration laboratory is one of the n­est in the UK. Comark UKAS certicates can offer the lowest

uncertainty of 0.01°C and provide independent proof of correct
calibration using equipment and procedures audited by UKAS
inspectors. The equipment used is fully traceable to the Na­tional Physical Laboratory.

b) UKAS Humidity Certication

In addition to the Comark temperature laboratory, the humidity

laboratory continues the tradition of high accuracy certication

and a wide range (25% to 90%RH) with uncertainties of 2.8% of
reading. This range also includes Dew point measurements.

c) NPL Traceable Certication

Comark NPL certicates are traceable to the National Physical

Laboratory and can offer uncertainty as low as 0.3°C.

4

Conformance

Certicates of conformance can be supplied for new, serviced and
recalibrated instruments. These conrm that instruments are within their
original manufactured specication.

Service/Repairs

Regular servicing and any required repairs, under warranty or after, are
available from the Comark Service Department.

For more information on all Comark certication, calibration and service

facilities please call Comark Customer Support or contact your local
distributor.

5

1 INTRODUCTION

1.1 Transducer Input

The C9550 external pressure meter accepts all Comark
pressure transducers model 3392, 3393, 3397 or 3398.
Connection is made by means of the 8-pin socket and
the 1.5 metre interface cable. An inbuilt serial interface
allows the C9550 to communicate with the transducer
and provide correct display of the pressure value in any
one of the pressure units selected. Suitable pressure
transducers are:

Model Pressure range, bar Diaphragm Type

3392/PG Series 0.1 to 4000 Internal Gauge
3393/PA Series 0.25 to 16 Internal Absolute
3397/PGF Series 0.1 to 600 Front Flush Gauge
3398/PAF Series 0.25 to 16 Front Flush Absolute

Table 1. Transducer Model References

1.2 Transducer Operator Manual

The separate Transducer Operator Manual provides
details of the installation, troubleshooting and calibra­tion of transducers.

1.3 Transducer Range Data Sheet

Pressure ranges extend from 0.1 to 4000 bar. The
separate Transducer Range Data sheet, Ref: C089,
lists all pressure ranges available in each of Gauge /
Absolute, Internal Diaphragm / Front Flush Diaphragm,

0.5% / 0.25% accuracy types.

1.4 Ranges, scales and resolutions

A tabular listing of the scales and resolutions of Comark
stocked ranges is provided in section 5.3. The com­plete listing for all 24 ranges is available separately as
Engineering Note 18, and is available from the Cus­tomer Service Department.

6

2 KEY FUNCTIONS

2.1 ON/OFF Key

Press once to switch on the instrument. Repeat to
switch off.

Holding down the key when switching on will display the
maximum pressure range for the attached transducer in
Bar. When the key is released the previously set pres­sure units will be employed.

Holding down the key when switching off will display all

segments as a test.

2.2 ZERO Key

Press to zero the current readings on the display to nul­lify any offsets caused by large temperature variations,
or to provide a tare function. The instrument discards
any such offset when switched off, and will apply no off­set when switched back on. The zero key can be used
whenever offsets occur. Please note that pressing the
zero key has no effect whilst the instrument is in hold or
record modes.

Note that if the zero function is used to set to zero
(tare) a standing pressure reading, the -02- overpres­sure warning will continue to occur at 110% of full scale
transducer pressure, although the numerical value dis­played will not then be 110% of full scale. This ensures
that the display warning for overpressure will apply to
the safety of the transducer.

2.3 SCALE Key

Press to display the pressure measurement in each of
the different scales available. The selected scale unit
is retained in memory even after switch off, so that the
selected unit can be displayed when the instrument is
switched on again.

See Section 5 for a fuller explanation of the C9550
pressure scaling system.

7

2.4 HOLD Key

Press to hold the displayed reading and press again to
resume measurement. The scale key will operate while
the instrument is in hold mode so that the held reading
can be displayed in different scales.

2.5 FILTER Key

Press to lter out transient readings. In lter mode the

instrument will average the readings taken over the
last 4 seconds (16 readings) to provide a more stable
reading on the display. Press the key again to resume
normal measurement.

2.6 RECORD Key

Press once to put the instrument into record mode.
This will be indicated by the word RECORD on the dis­play. Maximum and minimum pressure readings can be
stored and displayed while the instrument is in record
mode. When the instrument is in record mode, press
key once to display the current maximum reading and
press again to display the current minimum reading.
Pressing the key a third time will return the display to
normal measurement.

Record mode can be cancelled and the max/min read­ings cleared by pressing and holding down the key until
the word RECORD disappears from the display.

The scale key will operate while the instrument is in
record mode so that the max/min readings can be
displayed in different scales.

2.7 AUTO Switch Off

The instrument can be programmed to auto switch off by
pressing and holding down the HOLD key while using the
ON/OFF key to switch on the instrument. The word AUTO
appears on the display to indicate auto switch off mode and
the instrument will switch itself off approximately 3 minutes
after the last use of the keypad. Auto switch off mode can
be cancelled by pressing and holding down the HOLD key
while switching on manually with the ON/OFF key.

8

3 PRESSURE SOURCE CONNECTION

Transducers for use with the C9550 instruments are tted with

G½A male connectors The following checks must be made
before connecting them to a pressure source:-

•See warnings on page 2.

•Refer to the separate Transducer Operator

Manual.

•Please ensure that you check your own safety

standards before connecting to a pressure source.

•Check the security of all ttings.

•Do not undo pressure connections until the

pressure is released rst.

•Check the pressure rating on the transducer label.

•Check that the pressure source does not exceed

the ratings for the transducer as set out in Table 2.

•Check that the gases to be measured will not

damage or corrode the stainless steels in the
transducer.

Transducer Maximum
Pressure Ranges Overpressure

0.1 to 16 bar 350% of Full Scale
25 to 600 bar 200% of Full Scale
1000 bar 150% of Full Scale

1600 to 4000 bar 120% of Full Scale

Table 2. Overpressure limits for ranges

9

4 OTHER FUNCTIONS

4.1 Battery Low

Low battery is indicated by the symbol BAT on the
display. Replace the battery as soon as possible after
this symbol appears.

4.2 Over 9999 Reading Indication

If the numeric value for the display exceeds ±9999, with
or without a decimal point, the display will blink and
suppress the top (5th) digit, whilst continuing with cor­rect values of the lower 4 digits.

4.3 Absolute or Gauge Measurement

C9550 Series instruments can be used with either
gauge or absolute pressure transducers; no adjustment
is required between use of either type. Refer to the
transducer label to determine the measurement type.
As the transducer only has a single port a direct dif­ferential measurement is not possible; in this case the
zero function may be used between measurement from
two transducers.

4.4 Error Messages

The following error messages may appear on the dis­play to indicate incorrect operation or malfunction:

-00- Sensor not connected

-01- Overow of A/D converter

-02- Overpressure (110% of Full Scale pressure)

-03- Mode not feasible
SCL Invalid Scale Units

10

• Error -00- indicates no sensor is connected.

• Error -01- occurs if connected transducer

signal is too high (for example because of a
transducer defect or a pressure overload).

• Error -02- indicates an attempt to measure

a pressure (either positive or negative) that
exceeds the range of the transducer by
more than 10%. If this occurs the pressure
must be reduced to avoid damage to the
sensor in the transducer.

• Error -03- indicates either

a) an attempt to attach an incompatible
sensor type.
b) an interrupted data transmission
between sensor and instrument.

• Error SCL - indicates the scale units are

not available on this transducer.

In the case of b) either reconnect the transducer or
switch OFF then ON again. In the case of c) press the
SCL key for the next supported scale units.

4.5 Battery Replacement

Unscrew the two screws at the base of the instrument
and slide off the battery cover. Replace the battery with
a 9V PP3 type battery. Replace the battery cover tak­ing care not to over tighten the two screws.

11

5. UNITS OF MEASUREMENT

5.1 The C9550 Pressure Scaling System

Units other than the SI-units bar will be calculated by
the C9550 using internationally agreed conversion fac­tors. Once powered up the instrument will display val­ues in the same scale as last selected. One or multiple
depressions of the SCALE key will change the display
to read other units of measurement.

For a given transducer, only those pressure scales with
full scale numeric values less than 11,000 are avail­able for selection; thus the lower pressure transducers
have progressively more scales, to a maximum of 12
for the 0.1 bar transducer. The full display sequence of
pressure scales is Kgcm-2, mBar, Bar, inHg, Torr, inH2O,
kPa, Pa, mmHg, PSI, mmH2O, mH2O. For a complete
listing of all scales and resolutions available for each
pressure transducer, please consult the Comark Cus­tomer Service Department.

Because pressure scaling is a function of the trans­ducer connected, the instrument automatically detects
the transducer type at switch-on, or if a transducer is
connected when the instrument is already switched
on. This is known as ‘hot swapping’ when the full scale
bar pressure is displayed for a period of 1.5 seconds to

conrm proper detection of the new transducer.

The error message -03- is displayed either if the select­ed scale is not available with the attached transducer or
if the valid transducer type was not detected. To clear
the message reconnect the transducer and/or press the
scale key.

12

5.2 Calibration Scale

A ±500.0 mV scale for checking instrument calibration may
be reached by holding down the SCL key when switching ON.
This scale is cancelled by switching the instrument OFF. The
units displayed for this scale are simply shown as ‘m’. Details
of a suitable calibration lead may be obtained from the Comark
Customer Service Department.

1 bar = Unit Conversion Factor

mbar 1000

inHg 29.530
Torr 750.06
inH2O 401.46
kPa 100
Pa 100000
mmHg 750.06
psi 14.5038
mmH2O 10197.2
mH2O 10.1972
kgcm-2 1.01972

Table 3. Scale Conversion Factors from 1 bar.

13

5.3 Table of Full Scale Pressures and Resolutions

Scale FS,bar 2.500 6.000 9.999 9.99 400.0

mBar Range 2500 6000 10000 NS NS

Resolution 1 1 1

Bar Range 2.500 6.000 10.000 100.00 400.0

Resolution 0.001 0.001 0.001 0.01 0.01

inHg Range 73.82 177.2 295.3 2953 NS

Resolution 0.01 0.1 0.1 1

Torr Range 1875 4500 7501 NS NS

Resolution 1 1 1

inH2O Range 1003.7 2409 4015 NS NS

Resolution 0.1 1 1

kPa Range 250.0 600.0 1000.0 10000 NS

Resolution 0.1 0.1 0.1 1

Pa Range NS NS NS NS NS

Resolution

mmHg Range 1875 4500 7501 NS NS

Resolution 1 1 1

PSI Range 36.26 87.02 145.0 145.0 5802

Resolution 0.01 0.01 0.1 1 1

mmH2O Range NS NS NS NS NS

Resolution

mH2O Range 25.49 61.18 101.97 1019.7 4079

Resolution 0.01 0.01 0.01 0.1 1

-2

Kgcm

Resolution 0.001 0.001 0.001 0.01 0.1

Range 2.549 6.118 10.197 101.97 407.9

Table 4. Full scale pressures and resolutions

14

Notes about table 4:

• The bold FS, bar value listed appears on

display at power-on when the ON button is
held.

• Key: NS = No Scale.

• Underline means this digit is absent, and

the remaining digits blink.

A full 24 range, 12 scale tabular listing is available from
Comark as Engineering Note 18.

6. Optional Equipment

Transducer interface cable, ADP22.

This is available from Comark Limited.
See Section 7 for the wiring of the interface cable.

Pressure transducers

These are not supplied with the instrument, and can
be ordered from the wide range available from Comark
Limited. For details of all ranges, 0.1 to 4000 bar refer
to the Transducer Range Data Sheet, Ref: C089 or con­tact Comark Limited. Each internal diaphragm trans-

ducer is supplied complete with one G1/2-W gasket.

Transducer interface cable, ADP22.

This is available from Comark Limited.
See Section 7 for the wiring of the interface cable.

Pressure transducers

These are not supplied with the instrument, and can
be ordered from the wide range available from Comark
Limited. For details of all ranges, 0.1 to 4000 bar refer
to the Transducer Range Data Sheet, Ref: C089 or con­tact Comark Limited. Each internal diaphragm trans­ducer is supplied complete with one G1/2-W gasket.

Adaptor G½A female to to G¼A male, ADP23

This is supplied complete with one G1/4-W gasket.
Comark do not supply any other adaptors. If you require
adaptors other than ADP23, these should be sourced
locally.

Transducer gaskets

These are required in order to obtain a seal. Copper
gaskets may be used up to 3 times, O-ring gaskets may
be used repeatedly, and comprise:
G1/2-W Copper gasket for G½A
G1/4-W Copper gasket for G¼A
G1/2-OW O-ring gasket for G½A.

15

7. WIRING OF INTERFACE CABLE

The standard interface cable has a length of 1.5 metres which
is adequate for normal use. For greater lengths two cables may
be joined end to end as the plug on one can be connected to
the socket on the next. Alternatively cables up to 5 metres may
be made by the user.

Wiring of interface cable

Plug Socket Wire Signal
Pin Pin Colour Function

1 1 Black Data I/O
2 2 Brown Serial Clock
3 3 Red ­4 4 Orange Chip Select
5 5 Yellow + supply
6 6 Green + signal
7 7 Blue - supply
8 8 Purple - signal

16

8. INSTRUMENT SPECIFICATION

CALIBRATED ACCURACY ±0.06% of reading± 1 digit
at +23°C

TEMPERATURE <0.01% of reading per °C
COEFFICIENT change from 23°C
OF READING

RESPONSE TIME 4 readings per second

OPERATING RANGE -20 to +50°C

ENVIRONMENTAL RATING IP67

POWER SOURCE 9V PP3 6F22 - MN1604 UCAR9V

BATTERY LIFE 140 hours (using MN1604)

LOW BAT CHECK Displays BAT just before

end point of battery

DISCONNECTED TRANSDUCER - 0 0 -
INDICATION

OVER PRESSURE - 0 2 -
INDICATION

OVER 9999 Lowest 4 digits blink
READING INDICATION

CONNECTIONS 8 way Lumberg socket

KFV81 Mating plug, Lumberg SV81

OVERALL DIMENSIONS Height 173mm,
Width 70/83mm,
Depth 32mm

WEIGHT 255 gm including battery

17

Declaration of Conformity

We:

Comark Limited
Bury Mead Road
Hitchin
Herts
SG5 1RT

Declare that the product:

Comark C9550

Is in conformity with the requirements of the follow­ing documents (Directives):

EMC Directive 2004/108/EEC

Standards:
EN61326-1:2006

Signed on behalf of
Comark Limited

at:

David French
Quality Manager

18

Bury Mead Road
Hitchin
Herts
SG5 1RT

Fig. 1 View of the complete measurement system.

19

20

Comark Limited
52 Hurricane Way
Norwich, Norfolk, NR6 6JB England
Tel: 01603 ([phone]
Fax: 01603 ([phone]
Email: [e-mail]

Website: www.comarkltd.com

Comark Instruments
PO Box 9090, Everett,
WA 98206, USA
Tel: [phone]
Fax: [phone]
Email: [e-mail]

Website: www.comarkUSA.com

© Comark Limited Stock No. 16986 Issue 8 11/09