Alpha Moisture Systems DS5000 User manual

Document No:1188
Issue 2
Date 14/11/03
Model DS5000 Dewpoint Monitor
Instruction Manual
Alpha Moisture Systems
Alpha House
96 City Road
Bradford
BD8 8ES
England
Tel: [phone]
Fax: [phone]
Email: [email protected]
Web: WWW.amsytems.co.uk

1188 Instruction Man DS5000.doc Page ii
Instruction Manual
for the
DS5000 Dewpoint Monitor

1188 Instruction Man DS5000.doc Page iii
Index
1General Information ....................................................................................................1
2Safety Information .......................................................................................................1
2.1 Warning .................................................................................................................................1
2.2 Isolation .................................................................................................................................1
3Installation ....................................................................................................................2
3.1 Installing the Instrument into a Panel ....................................................................................2
3.2 Instrument Wiring..................................................................................................................2
3.3 Power Supply Cable...............................................................................................................3
3.4 Alarm and Output Cable Connectors: -..................................................................................3
3.5 Sensor Cable ..........................................................................................................................3
4Installing the Air/Gas Sampling System ....................................................................3
4.1 Piping installation Schematic.................................................................................................4
4.2 Piping Schematic Component Index......................................................................................5
5Installing and Commissioning the DT45 Sensor .......................................................5
6Default Instrument Configuration..............................................................................6
7Resetting the DS5000 ...................................................................................................6
8Programming the DS5000 ...........................................................................................7
8.1 Principle of Entering Numerical Data....................................................................................7
9Configuring the DS5000 ..............................................................................................7
9.1 unit .........................................................................................................................................7
9.2 AL 1 & 2................................................................................................................................8
9.3 bELL......................................................................................................................................8
9.4 PrES .......................................................................................................................................8
9.5 4-20 ........................................................................................................................................9
9.6 VoLt.......................................................................................................................................9
9.7 ACAL...................................................................................................................................10
9.8 oFSt......................................................................................................................................10
9.9 CodE ....................................................................................................................................11
9.10 InFo......................................................................................................................................11
9.10.1InFo-rmation Details.............................................................................................................12
10 Normal Operation of the DS5000 .............................................................................12
11 Pressure Correction ...................................................................................................13
11.1 Examples..............................................................................................................................13
12 Monitoring the System...............................................................................................13
13 Faults/Errors...............................................................................................................14
13.1 Other Error mesages ............................................................................................................14
14 DS5000 Specification..................................................................................................15
15 Appendix A – Software Menu Map..........................................................................16

1188 Instruction Man DS5000.doc Page 1 of 16
1General Information
•The DS5000 Monitor is a DIN style panel mounted moisture monitoring device
designed to work in conjunction with the DT45 Dewpoint Transmitters.
•The readout of moisture content is displayed on a backlit, 4 digits, seven segment
LCD, in any one of six selectable engineering units (see DS5000 specification). The
selected unit is displayed on a separate seven segment LED.
•The user has the option of displaying pressure corrected or uncorrected moisture
values.
•The instrument can be operated from either an AC or DC power source (see DS5000
specification for details).
•The DS5000 operation is controlled by a four-button membrane keypad. The user-
friendly software uses a simple menu selection process and incorporates several hot
keys to read the transmitter temperature and the two alarm trigger points.
•Two fully customer controllable access security levels.
•The Model DS5000 utilises the advanced DT45 Dewpoint Transmitter, which allows
complete interchange ability of transmitters.
•The calibration data is stored within the transmitter and is readable from the DS5000
display.
•The DS5000 can perform auto-calibration and implement offsets on the attached
transmitter. All the values are stored on the transmitter retaining the interchangeability
of the transmitters.
•The DS5000 has two full range alarms that can be set as rising or falling edge
triggered. These alarms are visual (LED), audible and activate changeover relays for
remote indication or control.
•The DS5000 also has two independently, variable span, fully controllable linear
outputs. 1) 4-20mA and 2) 0 to 5V. The voltage output can be factory set to 0-100mV
or 0-1V.
•Details of normal operation, engineering unit selection, transmitter data and
configuration of the instrument are described within this manual.
2Safety Information
Read the safety information below, before installation.
2.1 Warning
Hazardous voltages may be present on instrument terminals. The equipment must be installed
by suitably qualified personnel and the instrument must be mounted in a position that
provides protection, behind the panel, to at least IP20.
2.2 Isolation
The power supply terminals and associated internal circuitry are isolated from all other parts
of the equipment in accordance with EN61010-1 for connection to a category II supply
(pollution degree2).

1188 Instruction Man DS5000.doc Page 2 of 16
Any terminals or wiring connected to the input or output, which are accessible in normal
operation, must only be connected to signals complying with the requirements for Safety
Extra Low voltage (SELV) circuits.
The mains supply to the instrument must be protected by an external 1-amp fuse and a
suitable switch or circuit breaker, which should be near the instrument.
Note: The instrument contains no user serviceable parts.
3Installation
3.1 Installing the Instrument into a Panel
Make a cut-out in the donor panel 138.0 x 68.0mm (DIN 43700).
The maximum panel thickness is 8mm and, if an effective IP65 weatherproof seal is required,
the minimum recommended panel thickness is 1.6mm.
Pass the instrument case through the cut-out in the donor panel and attach the two retaining
screws to the studs on either side of the case.
Tighten the retaining screws onto the back of the donor panel until the instrument is clamped
securely in position. The screws must be tightened sufficiently to affect a seal between the
front of the donor panel and the back of the instrument bezel, but never over tightened.
3.2 Instrument Wiring
Wire the DS5000 as per figure 1.1 below.
Figure 1.1
SENSOR
CONNECTIONS
A B C D + -+ -NO C NC NO C NC + -N GND L
RED
BLUE
GREEN
YELLOW
+ve
GN
D
-ve
Power Supply
90-250V AC
50/60 Hz
Max Power
10VA
-ve
+ve
Power Supply
12V DC
Max Power
10VA
Alarm 2
Alarm 1
NC
NC
N
O
N
O
+
-
4-20mA
Output
+
-
0-5V
Output

1188 Instruction Man DS5000.doc Page 3 of 16
3.3 Power Supply Cable
The DS5000 can be powered by either a 90-250V AC or 12V DC supply. Connect the
required supply cable to the appropriate terminals as shown in figure 1.1.
The AC power supply should be between 90 and 250V AC @ 50/60Hz.
The power supply wires are retained by screws. Ensure that the exposed section of the wire is
fully inserted and that no loose strands are exposed.
3.4 Alarm and Output Cable Connectors: -
Connect the required cables to the appropriate terminals as shown in figure 1.1, noting the
normally open and normally closed relay contact positions, and that the correct polarity and
the maximum load specification are strictly observed for the analogue outputs.
Ensure that the wire is fully inserted and that no loose strands are exposed.
3.5 Sensor Cable
Connect the sensor cable as shown in figure 1.1. Ensure that the correct colour coding is
observed and that the cage is securely clamped onto the bootlace ferrules on the cable
provided.
Root the sensor cable to the intended site of the sensor.
4Installing the Air/Gas Sampling System
The piping installation schematic diagram (see section 4.1) shows all components, which
could be used in a dry gas measurement application although not all the items shown will be
required for every installation.
Care should be taken to ensure that the sample presented to the measuring sensor is not
contaminated with any component that will damage, contaminate or affect the sensor in a
way that will impair the system accuracy.
It is strongly recommended that the sample should not contain particulate matter, oil or other
heavy hydrocarbon condensate. If these components contaminate the sample system and/or
the measuring sensor, the system response time will be lengthened, although the sensor
calibration will not be effected.
The sample must not contain Ammonia, Chlorine, Ozone or any wet acid vapours or
liquid as these will permanently damage the sensor and impair calibration accuracy.
The flow rate, although not critical to the sensor measurement, should be low enough to
avoid abrasion to the sensor surface without being so low as to extend the system response
time to an unacceptable level. In general, a flow rate of between 2 and 3 litres/min at NTP
will give the right balance.

1188 Instruction Man DS5000.doc Page 4 of 16
The sensor is a variable capacitor, which is directly affected by changes in partial pressure of
water vapour, and these changes, that are proportional to the dew/frost point temperature, are
displayed on the instrument indicator.
The measuring sensor can be installed directly into the process line but this does create
problems with access for maintenance and calibration. It is for these reasons that we
recommend that the sensor be installed in a bypass, fast loop or total loss sample system
where the sensor is accessible without interrupting the main process flow line.
4.1 Piping installation Schematic
1
2
3
4A
4B
5
6
7
8
9
10
11
P
Main
Process
Line
Notes
a. The sample point should be on the upper surface of the horizontal pipe, or from a
vertical section of pipe, wherever possible.
b. The sample tube should run upwards from the sample point. If this is not possible,
then an inspection port or drain tap should be installed at the lowest point in the
sample system.

1188 Instruction Man DS5000.doc Page 5 of 16
4.2 Piping Schematic Component Index
1) Sample Isolation Valve -This is a recommended item as it allows access to the sample
system without interrupting the main process line.
2) Sample Tube –This should be stainless steel for dry air or gas applications but copper or
carbon steel can be used where wetter gases are to be measured. If any section of the
sample tube must be flexible then PTFE should be used. In most cases, 3mm OD (1/8”) is
sufficient as it provides good system response time within minimum flow. 6mm OD (1/4”)
tube can be used where pressure drops across the 3mm tube are too high
3) Filter Unit –A filter unit is recommended when the samples are likely to contain
particulate matter. If the air/gas sample contains heavy hydrocarbon condensate, the filter
must be of the coalescing type with a drain. The filter unit should be positioned as close to
the sample point as practical.
4) Pressure Reduction Valve or Pressure Regulator –If the sample is to be measured at
atmospheric pressure then the valve 4A should be fitted and 4B omitted from the system.
If the sample is to be measured, at full line pressure and the exhaust vented to atmosphere,
then valve 4B should be fitted and 4A omitted from the system. If measurements are to be
taken at full line pressure and the sample is to be returned to a part of the main line or a
vent, which is at a pressure higher than atmospheric, and the input to that line needs a
controlled pressure then both 4A and 4B will be required.
5) Sample Pressure Gauge –This is not a critical part of the moisture measurement but may
be required if Dew/Frost point measurements are to be made at higher than atmospheric
pressure.
6) Measuring Sensor.
7) Sensor Holder.
8) Desiccant Chamber –This item is required when the sampling is to be intermittent. When
installed it prevents the ingress of wet air to the sample system, while the sample is not
flowing, improving the response time.
9) Flow Control Valve –This can be a separate item or combined with the flow indicator.
10) Flow Indicator –The recommended sample flow is 2 to 3 SL/M.
11) Sample Exhaust –The exhaust can be vented to atmosphere or returned to the process line
as discussed above.
5Installing and Commissioning the DT45 Sensor
It is advisable to carry out an initial purge routine of the sample loop, before installing the
sensor, in order to remove the possibility of sensor damage on start-up.
Refer to the sample system schematic in section 4.1. Open the inlet isolation valve slowly,
until a small flow of air/gas at atmospheric pressure flows through the inlet pipe work to the
sensor holder and exhausts through the sensor entry port of the sensor holder.

1188 Instruction Man DS5000.doc Page 6 of 16
Allow this purge to continue for about 15 to 20 minutes to remove any residual moisture from
the sample pipe work and components.
Close the inlet isolation valve and install the sensor into the sensor holder. Locate and secure
the four pin sensor cable connector in positioned on the sensor. Use the locking screw in
order to affect a weatherproof seal.
NOTE
The Plug and socket will only locate in one position as the 0V pin is different to the
other three pins. However, the plug is designed so that when the retaining collar is
loosened the plug can rotate. Take care not to overly twist the wires within the DT45
case.
Open the inlet valve slowly, again and, by opening all valves after the sensor holder, allow a
low-pressure purge through the whole sample system. (Note. If a closed by-pass loop is
installed, this section of the procedure is not possible).
Set the required pressures and flows within the sample loop.
This completes the installation and commissioning but, on initial start-up, it could take
several hours for the system to reach equilibrium.
The instrument will now indicate the dewpoint of the air/gas surrounding the sensor, at sensor
pressure and the analogue outputs will be giving voltage and mA signals proportional to the
indicated dewpoint.
6Default Instrument Configuration
The standard factory settings are as follows
•The instrument will display the moisture content in oC Dewpoint.
•Both alarms are set to trigger when rising above 20oC.
•The internal buzzer is set to on.
•The pressure compensation value is set at 0Barg.
•The 4-20mA output is set to the full range of the transmitter e.g. 4mA = -80oC
20mA = 20oC
•The voltage output is set to the full range of the transmitter e.g. 0v = -80oC
5v = 20oC
•All ACAL calibrations are removed.
•All offsets are removed.
•All security codes are disabled.
7Resetting the DS5000
It is possible to reset the DS5000 to factory set conditions by powering up the unit while any
one of the four front panel keys is pressed. See ‘Default Instrument Configuration’ above for
details of the default values.

1188 Instruction Man DS5000.doc Page 7 of 16
8Programming the DS5000
8.1 Principle of Entering Numerical Data
Wherever a numerical number has to be entered into the DS5000 the following text will be
found. “Use the ‘S’, ‘T’, ‘12’, & ‘↵’ keys to enter ……”. The basic principle used to
enter numerical values (integer and floating point) is described here.
The first character of the LCD display flashes to indicate it is active. Use the ‘S’ and ‘T’
keys to select the required number between 0 and 9 (-1 and 9 in some engineering units) then
press the ‘12’ key to make the second character flash. Use the ‘S’ and ‘T’ keys to select
the required number between 0 and 9 then press the ‘12’ key to make the third character
flash. Continue this process until all four characters are entered. In the case of a floating-point
numbers, press the ‘12’ key again makes the decimal point (dp) active. Use the ‘S’ and
‘T’ keys to position the dp in the required position. A subsequent press of the ‘12’ key
makes the first character active again. Pressing the ‘↵’ key at any point confirms the
numerical value.
Note –The Passwords used within the DS5000 are made off four integers and does not use the dp.
Note –The only way to leave the numerical part of this routine without saving it is to allow the 60-
second timeout to occur.
9Configuring the DS5000
To activate the Systems Menu press the key sequence ‘↵’ ‘12’ ‘↵’. This will display the
‘SYS’ message on the LCD as portrayed in the System Menu Map (see Appendix A).
Pressing the ‘↵’ key again enters the system menu map at the ‘unit’ screen on the base level.
There are 11 base level options described below:
Note: The default set-up will go directly from the SYS message to the unit screen. However, if the user
has set a SYS password, then the user is prompted to enter the correct password before continuing on to
the base level.
Note: Most of the screens within the menu have an active 60-second timeout. Therefore, if no keys are
pressed within this period the unit reverts automatically to normal operation. In most cases where the
60-second timeout occurs, changes made are not implemented.
9.1 unit
Description - The unit menu option allows the user to select the required engineering units
(See DS5000 Specification section 14 for details). Once the engineering unit is selected the
DS5000 will only display and accept inputs in that chosen unit.
The current engineering unit is displayed in the seven segments LED during normal operation
Note: When the engineering unit is altered, the LCD display changes to show the current moisture level in the
selected unit.

1188 Instruction Man DS5000.doc Page 8 of 16
Operation – While ‘unit’ is displayed press the ‘↵’ key to enter the subroutine. The LED
now flashes the currently selected engineering unit while the LCD display shows the
corresponding moisture level. Use the ‘12’ key to scroll through the options until the
required unit is flashing on the LED. Press the ‘↵’ key to select the new engineering units.
Pressing the ‘S’ key at any time reverts to the ‘ unit’ screen without saving any unit changes.
Note: See DS5000 Specification for detailed information on Engineering Units.
9.2 AL 1 & 2
Description – The AL 1 & 2 menu option allows the user to set 2-alarm trigger points. The
trigger points can be any value within the operating range of the currently selected
engineering units. The alarm triggers can be either a risings moisture levels (Hi), or a falling
moisture levels (Lo).
Operation – While ‘AL 1 or AL 2’ are displayed pressing the ‘ ↵’ key enters the subroutine.
The LCD now displays either ‘Hi’ or ‘ Lo’. Use the ‘ 12’ key to select the required option
and then press the ‘↵’ key.
Note -If the ‘

’ key is pressed instead of the ‘↵’ key the DS5000 will return to the ‘ AL 1 or AL 2’
screen on the base level, without saving any changes.
Once the ‘↵’ key is pressed, ‘SET1 or SET 2’ will be displayed. The user can now escape
using the ‘S’ key or continue by pressing the ‘ ↵’ key. The current or default trigger point
value is displayed. Use the ‘S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the required trigger point.
Pressing the ‘↵’ key confirms the alarm settings and returns to the ‘ AL 1 or AL 2’ display.
Note –The only way to leave the numerical part of this routine without saving is to allow the 60-
second timeout to occur.
9.3 bELL
Description – The bELL menu option allows the user to set the internal buzzer to On or Off.
Operation – While ‘bELL’ is displayed press the ‘ ↵’ key to enter the subroutine. The LCD
now displays either ‘On’ or ‘ OFF’. Use t he ‘12’ key to select the required option and then
press the ‘↵’ key. If the ‘ S’ key is pressed instead of the ‘ ↵’ key, the DS5000 will return to
the ‘bELL’ screen on the base level, without saving any changes.
9.4 PrES
Description – The PrES menu option allows the user to enter the line pressure and sensor
pressure in PSIg, barg, Mpa (PAS) or kg/cm2 (gcS), so that the displayed absolute moisture
readings (PPMv, PPBv, g/m3and lb/MMSCF) can be pressure corrected and pressure
dewpoint can be displayed. When a pressure has been entered into the DS5000 the LED
display alternates between the current engineering unit and a ‘≡’ icon to indicate the data
displayed is pressure corrected.

1188 Instruction Man DS5000.doc Page 9 of 16
Operation – While ‘PrES’ is displayed press the ‘ ↵’ key to enter the subroutine. Use the
‘12’ key to run through the pressure options, until the required units are displayed. Press the
‘S’ key to escape or the ‘↵’ key to move to the next screen. Use the ‘12’ key to select
either line pressure ‘LP’ or sensor pressure ‘ SP’ and then press the ‘ ↵’ key. Use the ‘ S’,
‘T’, ‘12’, & ‘ ↵’ keys to enter the required pressure value. Pressing the ‘ ↵’ key conf irms
the entered value and returns to the ‘LP’ or ‘ SP’ option screen. The user then has the option
of entering the other pressure or escaping using the ‘S’ key.
Note –See section 11 on Pressure Correction for more detailed information.
Note –The only way to leave the numerical part of this routine without saving is to allow the 60-
second timeout to occur.
9.5 4-20
Description – The 4-20 menu option allows the user to set the operating range over which the
4-20mA output will span. The default setting is for the output to cover the full operating
range of the transmitter e.g. 4mA to equal –80°C and 20mA to equal 20°C. However, it is
possible to set a more focused span, such as 4mA to equal –60°C and 20mA to equal –20°C.
Operation – While ‘4-20’ is displayed press the ‘↵’ key to enter the subroutine. The LCD
now displays either ‘Hi’ or ‘ Lo’. Use the ‘ 12’ key to select the high or low range limit
whichever is required, and then press the ‘↵’ key.
Note -If the ‘

’ key is pressed instead of the ‘↵’ key the DS5000 will return to the ‘4-20’ screen on
the base level.
The LCD will now display the current High or Low range value. Use the ‘S’, ‘ T’, ‘ 12’, &
‘↵’ keys to enter the new value. Pressing the ‘ ↵’ key confirms and saves the new range
setting and returns to the ‘Lo’ or ‘ Hi’ display. The other range limit can now be set by
following the same process if required. Pressing the ‘S’ key returns to the ‘ 4-20’ display.
Note –Once the enter key is pressed to set either the high or low range limit, that value is written to
memory and will not revert to the previous value even if the 60 second timeout occurs.
9.6 VoLt
Description – The VoLt menu option allows the user to set the operating range over which
the 0-5v output will span. The default setting is for the output to cover the full operating
range of the transmitter e.g. 0v to equal –100°C and 5v to equal 20°C. However, it is possible
to set a more focused span, such as 0v to equal –60°C and 5v to equal –20°C.
Operation – While ‘VoLt’ is displayed press the ‘ ↵’ key to enter the subroutine. The LCD
now displays either ‘Hi’ or ‘ Lo’. Use the ‘ 12’ key to select the high or low range limit
whichever is required, and then press the ‘↵’ key.
Note -if the ‘

’ key is pressed instead of the ‘ ↵’ key the DS5000 will re turn to the ‘VoLt’ screen on
the base level.

1188 Instruction Man DS5000.doc Page 10 of 16
D
C
The LCD will now display the current High or Low range value. Use the ‘S’, ‘ T’, ‘ 12’, &
‘↵’ keys to enter the new value. Pressing the ‘ ↵’ key confirms and saves the new range
setting and returns to the ‘Lo’ or ‘Hi’ display. The other range limit can now be set by
following the same process if required. Pressing the ‘S’ key returns to the ‘ VoLt’ display.
Note –Once the enter key is pressed to set either the high or low range limit, that value is written to
memory and will not revert to the previous value even if the 60 second timeout occurs.
9.7 ACAL
Description – The ACAL menu option allows the user to Auto Calibrate any DT45
transmitter using the DS5000. Although the process is controlled and driven from the
DS5000, the Auto Cal values are stored and implemented in the transmitters, thus allowing
complete interchange ability of transmitters. Before starting this procedure, ensure that the
DT45 has been exposed to a known steady state moisture level for at least 10 minutes.
Operation – While ‘ACAL’ is displayed press the ‘ ↵’ key to enter the subroutine. If the
DS5000 is set-up to require a security code, the LCD now displays ‘codE’ for 2 seconds
followed by ‘0000’. Use the ‘ S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the current ACAL security
code. If no code is required or the correct code is entered the LCD changes to ‘rEF’ followed
2 seconds later by ‘0000’. Use the ‘ S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the moisture level at
which the Auto Calibration is being performed. When the ‘↵’ key is pressed, the DS5000
performs the Auto Calibration process on the DT45, which takes approximately 5 seconds
during which time ‘CAL’ flash’s on the LCD. The word ‘SEt’ is then displayed on the LCD
until the ‘↵’ key is pressed. The ‘ ↵’ ke y implements the Auto Calibration results and exits the
System Menu.
9.8 oFSt
Description – The oFSt menu option allows the user to superimpose an offset upon any DT45
transmitter using the DS5000. Although the process is controlled and driven from the
DS5000, the offset values are stored and implemented in the transmitters, thus allowing
complete interchange ability of transmitters.
ACAL adjusts slope of curve.
New settings stored in sensor.
Inst Reading 100%
Offset adjusts 1 point on the curve
leaving upper and lower limits as
set.
New setting stored in transmitter
-48.0 –46.0
Inst Reading

1188 Instruction Man DS5000.doc Page 11 of 16
Operation – While ‘oFSt’ is displayed press the ‘ ↵’ key to enter the subroutine. If the
DS5000 is set-up to require a security code, the LCD now displays ‘codE’ for 2 seconds
followed by ‘0000’. Use the ‘ S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the current oFSt security
code. If no code is required or the correct code has been entered the LCD changes to ‘crnt’
(offset position) followed 2 seconds later by ‘0000’. Use the ‘S’, ‘ T’, ‘ 12’, & ‘ ↵’ keys to
enter the value at which the offset is to be implemented. The LCD then changes to ‘nu’
(offset value) followed by ‘0000’. Use the ‘ S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the new
value for the offset. The LCD changes to the word ‘donE’ and then exits the System Menu 5
seconds latter.
Note: to remove an offset, simply re-input the values in the reverse order.
9.9 CodE
Description – The CodE menu option allows the user to alter the security passwords used to
protect the SYS, ACAL and oFSt routines.
Operation – While ‘CodE’ is displayed press the ‘ ↵’ key to enter the subroutine. The LCD
now displays ‘SYS’. Use the ‘ 12’ key to select the security password to be changed, and
then press the ‘↵’ key.
Note -If the ‘

’ key is pressed instead of the ‘↵’ key the DS5000 will return to the ‘CodE’ screen on
the base level.
The LCD displays ‘OLd’ for 2 seconds before displaying ‘0000’. The user is then required
to enter the current security password. Use the ‘S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the
password. Pressing the ‘↵’ key triggers the DS5000 to compare the entered code with the
stored code. If the two codes match, the LCD displays ‘nu’ for 2 seconds before displaying
‘0000’. Use the ‘ S’, ‘ T’, ‘12’, & ‘ ↵’ keys to enter the new security password. The LCD
then displays the word ‘donE’ to indicate that the new security password has been stored in
memory. The screen then reverts to ‘CodE’ 5 seconds latter.
Note: If the entered ‘old’ code is not the same as the stored code the user is sent back to the ‘CodE’
screen.
9.10 InFo
Description – The InFo menu option is as an aid in fault finding as well as a means of
displaying several key pieces of information with regard to the transmitter and DS5000.
Operation – While ‘InFo’ is displayed press the ‘ ↵’ key to enter the subroutine. The LCD
will now display the software version number e.g. ‘v0.18’. Each press of the ‘12’ key will
display a new piece of information. Pressing the ‘S’ key at any time will return to the base
level. The information is displayed in the following table: -

1188 Instruction Man DS5000.doc Page 12 of 16
9.10.1 InFo-rmation Details
LCD Display
Example
LED Display
Software version.
V0.18
Blank
Transmitter Serial Number - upper digits.
Sn20
S
Transmitter Serial Number – lower digits.
-207
S
Transmitter Lower Range.
-80.0
L
Transmitter Upper Range.
20.0
U
ACAL value.
0.1
A
ACAL point
4.7
r
Offset Implementation Point.
-52.0
P
Offset Value.
-40
o
If both offset values are the same, or 0, then there is no current offset.
Current Engineering Units.
C
E
Alarm 1 trigger (Hi or Lo).
Hi
1
Alarm 1 value.
20.0
1
Alarm 2 trigger (Hi or Lo).
Lo
2
Alarm 2 value.
-20.0
2
Bell on / off.
On
b
Pressure Units.
BArg

LP Pressure value.
0.0
»
SP Pressure value.
0.0

4-20mA Lo range.
-80.0
4
4-20mA Hi range.
20.0
Ü
Voltage Lo range.
-80.0
v
Voltage Hi range.
20.0
ÜY
10 Normal Operation of the DS5000
In normal operation, the DS5000 will display the current value as received via RS485 from
the connected DT45 transmitter. The value is updated once per second and is displayed in the
currently selected engineering units, which is indicated by the LED.
If a pressure has been entered into the DS5000, the LED will alternate between the symbol
for the currently selected engineering units and the ‘≡’ icon. This indicates that the m oisture
values displayed on the LCD have been pressure corrected.
The Alarm LED’s (AL 1 & AL 2) will light whenever an alarm condition occurs and only
turn off when the alarm condition clears. The DS5000 has an internal buzzer, which also
sounds whenever an alarm condition occurs. The buzzer can be muted by pressing the ‘↵’
key. The buzzer automatically shuts off whenever an alarm condition clears.

1188 Instruction Man DS5000.doc Page 13 of 16
Remote signalling of an alarm condition is provided by two internal changeover relays that
trigger at the same time as the LED’s. These relays are none latching and automatically
shutoff whenever the alarm condition clears.
It is possible during normal running to review the Alarm trigger points and the current
transmitter temperature without interrupting the monitoring process. Whenever a review is
activated, the LCD displays the requested value for 3 seconds before returning to the normal
Dewpoint reading.
•To review the AL 1 trigger point press the ‘S’ key for 2 seconds.
•To review the AL 2 trigger point press the ‘T’ key for 2 seconds.
•To review the transmitter temperature, press the ‘12’ key for 2 seconds.
11 Pressure Correction
When either ºC or ºF dewpoint units are selected, the display always showsthe dewpoint at
the ‘Line Pressure’ entered in the ‘Set -up’ menu.
All calculations to other engineering units are made from the ‘Sensor Pressure’ entered in the
‘Set-up’ menu.
It is therefore critical that the correct pressures are entered in the ‘Set-up’ menu in order that
the displayed values are correct.
11.1 Examples
•If a sensor is installed at atmospheric pressure and the instrument is required to
display line pressure dewpoint at 8 Barg;
LP (Line Pressure) should be entered as 8.0 and SP (Sensor Pressure) should
be entered as 0.0.
•If a sensor is installed at line pressure (8.0Barg) and the instrument is required to
display atmospheric pressure dewpoint;
LP should be entered as 0.0 and SP should be entered as 8.0.
•If the instrument is required to display dewpoint at the installed sensor pressure
then the LP and SP should be both the same and equal to the sensor pressure.
At 8Barg line pressure, both LP and SP should be entered as 8.0.
•Where the instrument is required to display any other engineering unit, the LP
value is irrelevant but the installed sensor pressure should be entered.
12 Monitoring the System
The system is designed to operate continuously, with a minimum amount of operator input.
It is, however, advisable to inspect the sample loop periodically to ensure that the required
pressures and flows are being maintained.

1188 Instruction Man DS5000.doc Page 14 of 16
While the sensor should give several years operation, it is advisable to have the calibration
verified, from time to time, to ensure accurate operation of the system. Please refer to your
local dealer for recalibration information.
The number and type of items employed in the sample loop will determine what, if any, other
routine checks should be made. If, for instance, a filter is used, the filter element should be
inspected periodically and changed when necessary.
The instrument should not require any routine maintenance but if any malfunction is
suspected it is advisable to contact your local dealer.
Should it be necessary, at any time or for whatever reason, to change either the instrument or
sensor, it should be noted that the components of the DS5000/DT45 system are completely
interchangeable.
13 Faults/Errors
If the sensor is short-circuited the display will read ‘Shrt’, the voltage output will drive to
full scale, the current output will drive to 24mA and both alarms/relays will trip.
If the sensor is open-circuited, the display will read ‘oPEn’, the voltage output will drive to
full scale, the current output will drive to 23.5mA and both alarms/relays will trip.
If communication with the transmitter is lost for a minimum of 20 seconds, the display will
read ‘conS’, the voltage output will drive to full scale, the current output will drive to 23mA
and both alarms/relays will trip.
If the sensor is wetted beyond its upper limit or the moisture reading is above the selected
units upper limit, the display will read ‘ovEr’, alternating with the upper display limit, or
transmitter range, at 0.5Hz.
If the sensor is dried beyond its lower limit or the moisture reading is below the selected units
lower limit, the display will read ‘Undr’, alternating with the lower display limit, or
transmitter range, at 0.5Hz.
Note: When an alarm trips the internal buzzer is sounded and the associated relay also trips. Only the
buzzer can be disabled in the system menu.
13.1 Other Error mesages
‘Err1’ = Alarm point set outside operating range of sensor
‘Err2’ = 4mA o/p setting is greater than 20mA o/p setting
‘Err3’ = 0v o/p setting is greater than the 5v o/p setting.
‘Err4’ = Offset greater that 2 0ºC or equivalent in other Engineering Units.
‘Err5’ = Sensor has been Auto Calibrated beyond 50% of its original range. Return
for calibration.

1188 Instruction Man DS5000.doc Page 15 of 16
14 DS5000 Specification
Transmitter: Compatible with the DT45 dewpoint transmitter. Autocal and Offset
corrections stored in the transmitter.
Enclosure: DIN Style, 144mm wide, 72mm high by 116mm deep.
PCB Layout: General PSU PCB and Display PCB to fit the DIN enclosure.
Display: Four characters, transmissive, backlit LCD display. Largest positive
number 9999. Largest negative number –199.
Alarm & Range Limits: Upper Limit Lower Limit
°C Dewpoint 20.0 -120.0
°F Dewpoint 68.0 -184.0
P(PPM) 9999 0.001
b(PPB) 9999 0.001
L(lb/MMSCF) 1000 0.001
g(g/m3) 15.0 0.001
Front Panel: A membrane keyboard with four keys and four windows for the four
character LCD, the single character seven segment LED and the two
alarm LED’s.
Pressure Correction: Software pressure correction implemented.
Power Supplies: Universal 90 – 250VAC 50/60hz or 12VDC.
Alarms: Two single pole changeover contacts (NO/C/NC), rated at 10A at
240VAC. Alarm trip at set point with 0.1ºC (or equivalent) hysteresis
to eliminate relay chatter.
Audible Beeper: Continuous sound when either Alarm 1 or Alarm 2 trip. Silenced when
‘↵’ key pressed. Also sounds when faults or errors occur.
Analogue Outputs: There are two linear outputs with separate terminals. Isolated 4-20mA
and isolated 0–5v as standard. The span of the outputs can be set by
software control. 0-1v and 0-100mv voltage outputs can be supplied
factory set.
Temperature Range: Electronics -10ºC to +60ºC Transmitter -10ºC to +50ºC
EMC: Designed to meet the EMC and LVD directives.
Diagnostics: Transmitter Open Circuit: ‘oPEn’
Transmitter short Circuit: ‘Shrt’
Comms Error: ‘conS

1188 Instruction Man DS5000.doc Page 16 of 16
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