Weidmüller PTX800D User manual

Q
UICKSTART
GUIDE
PTX800D
QS61001050
•
08/2004
Operation
General
The PTX800D is a scalable pulse counter/rate indicator for digital pulse
signals. It will display either the rate or total according to setup. The
other value is displayed when you hold down the
TOTAL/RATE
key.
For more complex applications, the PTX800D can be supplied with
two alarm channels and/or an analogue retransmit output.
Alarm conditions are indicated by the LEDs above buttons marked
AL1
(for alarm channel one) and
AL2
(for alarm channel two).
Manually clearing tripped alarms
The alarm channels can be set for automatic or manual reset. For
manual reset, the LED will flash when an alarm trips. These alarms will
only clear if you have acknowledged the alarm and the trip condition
has cleared. Press
AL1
or
AL2
to acknowledge the alarm.
Viewing the alarm setpoints
Press the
AL1
or
AL2
at any time to display the setpoint for that
channel. The value will be shown for 5s. If the alarms are disabled,
pressing the key will have no effect.
Changing the alarm setpoints
Press
PGM
while the setpoint is on display (see above), you will be able
to change the value using the
ì
and
Å
keys. To save the changes,
press
PGM
. Note: you can disable this feature during setup for greater
security.
Checking the Rate/Total
You can set up the PTX800D to show either total or rate. If the total
is normally on display, you can check the rate by holding down the
TOTAL/RATE
key.
Reseting the total
If you press the RESET key, the PTX800D will set the total to zero and
clear any total alarms (you can disable this feature during setup for
greater security). There is also an external reset input that you can use
to clear the total remotely.
Reviewing the setup options
To review the setup (in read only mode) press the
PGM
key. The
PTX800D will show the software version number. Press the
Å
key to
see the next setting. The information in review mode is shown in the
same order as setup mode (some irrelevant items will be skipped).
There is a 10s timeout during review mode or you can press
PGM
again
to return the display to normal operation.
You can review the setup while the instrument is in service - the unit
will continue to operate normally. Setup mode
Changing the setup options
You should only use setup mode if you have to change a setting or
calibrate the outputs. The setup mode stops all operation. As soon as
you have setup the last parameter, the unit behaves as if it has been
switched on with the new settings. This does not mean that the total is
reset - you must do this yourself if necessary.
If you want to abandon all the changes you have made, simply remove
the security link (or remove the power) before the
save
message is
shown.
To change the instrument setup:
1. Connect the security link (short pins 8 & 12).
2. Press the
PGM
key.
The setup sequence is shown in the table on page two.
Setup options
General
There are four basic areas of the instrument operation that must be
setup on a fully configured PTX800D. They are:
• Pulse/frequency inputs;
• Display and keypad operation;
• Alarms one and two (optional); and
• Analogue outputs (optional).
You can disable the alarms and/or analogue outputs if you do not
need them (so that their settings are skipped).
Software version
The information in this guide refers to versions 1.00 to 1.09.
Model
PTX series instruments all look identical from the front so this identifies
the intrument type.
Input signal type
Sets the input trigger and reset levels to suit the pulse source. The
table below gives the threshold values.
For contact closure inputs, the software incorporates debouncing
(minimum pulse width 20mS/maximum frequency 10Hz).
Input type
Low voltage inputs
High voltage inputs
Description
Trigger
Reset
Trigger
Reset
LOAC
50mV
-50mV
200mV
-400mV
Low level AC signals
HIAC
2.5V
-2.5V
14V
-10V
High level AC signals
LOdC
3.5V
0.5V
20V
-2V
Low level DC signals
HIdC
6V
3V
35V
10V
High level DC signals
CoN
6V
3V
35V
10V
Contact closure
Pulse rate
Set the pulse rate to low if the maximum input frequency is below
1kHz. Otherwise it should be set to high.
Pulse scaling factor
Sets the number of pulses received for a unit change in the total. So, if
you have a flowmeter that gives four pulses per litre, you can show the
total in litres by setting the pulse scaling factor to four, or in kilolitres by
setting the pulse scaling factor to four thousand. You can not set it to
more than 10 000 display digits (i.e., ignoring the decimal point).
Total decimal point
The total decimal point position sets the number of decimal places for
the total display. Totals are displayed using the full eight digits.
Rate decimal point
Sets the number of decimal places for the rate display. Rates are
displayed as five digit numbers.
Rate scaling factor
The rate scaling factor sets the ratio between the total display and the
rate display. It must be a power of ten (i.e., 1000,100, ..., 0.01, or 0.001).
Number of samples
The PTX800D calculates the rate every 260mS. The analogue output
and display are then updated from the average over the programmed
number of samples. For example, if you set the number of samples to
10, the analogue output and rate display will be updated every 2.6s.
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PTX800D
Setup Sequence
Setting
Display
Description
Å
ì
PGM
S/W Version
vEr_1.01
S/W Version 1.01
-
-
Next
Model
Pulse
Pulse counter: PTX800D
-
-
Next
Inputs
Input type
IP=
Introduces the input type
-
Next
LOdC
HIdC
LOaC
HIAC
Con
Low level DC
High level DC
Low level AC
High level AC
Contact closure (debounced)
Toggle
Accept
Input pulse rate
Freq=_LO
Freq=_HI
Low frequency input (below 1kHz)
High frequency input (from 1 to 10kHz)
Toggle
Accept
Pulse scaling
factor
Pulse_dp=
123.45
Pulse scaling factor decimal point
Demo display for decimal point selection
-
Shift
-
Shift
Next
Accept
PulSE_SF=
1.230
Introduces the pulse scaling factor
e.g., 1.230 Pulse = 1 Unit change in total
-
Dec
-
Inc
Next
Accept
Total and rate display settings and scaling
Total decimal
point
tot_dp=
1234.5
Introduces total decimal point
Demo, e.g., total shown to one decimal place
-
Shift
-
Shift
Next
Accept
Rate decimal
point
tot_dp=
12.345
Introduces rate decimal point
Demo, e.g., rate shown to 3 decimal places
-
Shift
-
Shift
Next
Accept
Rate scaling
factor
rATE=_SF=
1000
Introduces rate scaling factor
e.g., 1000 rate units = 1 total unit
-
Dec
-
Inc
Next
Accept
Rate timebase
rate_SEC
rate_min
rate_Hr
Rate is in units per second
Rate is in units per minute
Rate is in units per hour
Toggle
Accept
Number of
samples
SAmp=
10
Introduces the number of samples used for
rate, e.g., 10
-
Dec
-
Inc
Next
Accept
Show rate or
total
dis=rate
dis=tot
Display normally shows the rate
Display normally shows the total
Toggle
Accept
Reset key enable
Reset Total Key
Enable
En_resY
En_resn
RESET
key resets count
RESET
key ignored
Toggle
Accept
Alarm enable
Alarms 1 & 2
Select
A12Y
A12n
Enable
Disable (Select this option for PMX420)
Toggle
Accept
Alarm channel one settings
Coil energisa-
tion
A1_nor_E
A1_nor_d
Normally energised
Normally de-energised
Toggle
Accept
Alarm one type
A1=_rate
A1=_tot_
Channel one monitors total
Channel one monitors rate
Toggle
Accept
Alarm one
action
A1=_LO
A1=_HI
Low type (active below setpoint)
High type (active above setpoint)
Toggle
Accept
Setpoint value
Set_Pt1=
50.00
Setpoint value
e.g., 50.00%
-
Dec
-
Inc
Next
Accept
Deadband
value
dband_1=
0.01
Deadband value
e.g., 0.01%
-
Dec
-
Inc
Next
Accept
Timer delay
delay_1=
20
Timer delay (set to 0s to disable)
e.g., 20s
-
Dec
-
Inc
Next
Accept
Alarm channel two settings
As above
As channel one (except uses
A2_nor_E
,
A2=_rate
,...,
delay_2=
)
General alarm settings
Setpoint
security
SECure_y
SECure_n
Setpoints fi xed at setup
Can change setpoints
Toggle
Accept
Alarm reset
sequence
reS_Auto
rES_Oper
Automatic reset
Manual reset
Toggle
Accept
Analogue output settings (not shown unless outputs are fi tted)
Rate or total
output
Out=rate
Out=_tot
Analogue output proportional to rate
Analogue output proportional to total
Toggle
Accept
Rate range
repreresented
rate_LO=
0.00
Introduces the rate low value
e.g., 0.00
-
Dec
-
Inc
Next
Accept
rate_HI=
100.00
Introduces the rate high value
e.g., 100.00
-
Dec
-
Inc
Next
Accept
Total range
repreresented
tot_LO=
0.00
Introduces the rate low value
e.g., 0.00
-
Dec
-
Inc
Next
Accept
tot_HI=
100.00
Introduces the rate high value
e.g., 100.00
-
Dec
-
Inc
Next
Accept
Output type
Out=_Cur
Out=volt
Current (mA) output
Voltage (V) output
Toggle
Accept
Output range
Out_LO=
4.00
Introduces output low value
Value, e.g., 4.00mA
-
Dec
-
Inc
Next
Accept
Out_HI=
20.00
Introduces output high value
Value, e.g., 20.00mA
-
Dec
-
Inc
Next
Accept
Output Action
Out_dir
Out_rev
Direct (proportional) output
Reversed (inverted) output
Toggle
Accept
Calibration options
Calibrate
Output?
CalOut_n
CalOut_y
Skip output calibration
Calibrate outputs
Toggle
Accept
Display
Intensity
Intens_=
234567.89
Introduces the display intensity
Demo display for adjustment
-
Dec
-
Inc
Next
Accept
Save values SAVE Instrument is saving the changes to the setup and returning to
normal operation
Rate timebase
The rate timebase setting sets the timebase for the rate display. It can
be set to hours, minutes or seconds.
Show rate or total
Use the display rate/total setting to choose the measurement that will
normally be on display.
Enable Reset key
The front panel reset key can be used to reset the total. You can
disable this feature (for added security) using this setting.
Alarms disable/enable
If you do not need alarms, you can disable them. This simplifies the
setup process, as all of the parameters related to the alarm operation
are skipped.
Alarm type
Each alarm channel can monitor the total or the rate. Total alarms
operate when the setpoint is exceeded. A ‘total’ alarm trip condition
clears when the total is reset.
Setpoint
The setpoint is the display value at which an alarm activates. It can be
changed during normal operation if the setpoint security option is off.
Alarm action
High alarms are active above the setpoint and low alarms are active
below the setpoint. Total alarms are always ‘high’ type, so this setting
is not shown.
Deadband
This parameter sets the “hysteresis” for an alarm channel; the alarm
will clear above or below the setpoint to prevent chatter when the
rate level passes the setpoint. The minimum deadband is one display
count. Total alarms do not need a deadband setting.
Alarm output energisation options
There are many applications where it is important to raise an alarm
if the instrument power supply is cut off. Normally energised coil
operation allows for this application.
Alarm timer delays
Sets the minimum time that an alarm condition must be present to be
recognised.
Setpoint security
You can change the setpoints from the front panel. If you want to
disable this feature, switch on the setpoint security.
Alarm reset sequence
Alarms normally reset automatically when a trip condition has passed.
Manual reset requires the operator to press the appropriate key before
the alarm will clear. The alarm status LED flashes until the alarm is
acknowledged and then remains on until the trip condition is gone.
Total or rate output and range
To set up the analogue outputs you must first choose if the output is
going to be proportional to the rate or the total. After that you can set
up the portion of the rate/total range that you want to retransmit.
Analogue output format
These setup parameters let the PTX800D show the output range
correctly during review mode and prompt for the correct values during
calibration. They have no affect on the operation of the instrument. If
you cange them you must be prepared to calibrate the outputs.
Output Action
Direct action results in the normal, proportional output. Reverse action
gives an output that is inverted with respect to the rate, so a rate of
zero gives a full scale output and vice versa.
Display Intensity
There are fourteen different levels.
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PTX800D
NAMUR
sensor
–
PTX800D
10+ 129 11
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NPN type
3-wire sensor
(O/C outputs)
Sig–
PTX800D
9+ 10
Power (+ve)
Signal
Power (–ve)
11 12
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PNP type
3-wire sensor
(O/C outputs)
Sig–
PTX800D
9 12+ 10
Power (+ve)
Signal
Power (–ve)
11
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Sensor
PTX800D
9– 12Sig 1110
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Sensor
PTX800D
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Voltage pulse
source PTX800D
10- 11+
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Volt-free
contacts
PTX800D
ba 10 129 11
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Input type Low voltage inputs High voltage inputs Description
Trigger Reset Trigger Reset
LOAC 50mV -50mV 200mV -400mV Low level AC signals
HIAC 2.5V -2.5V 14V -10V High level AC signals
LOdC 3.5V 0.5V 20V -2V Low level DC signals
HIdC 6V 3V 35V 10V High level DC signals
CoN 6V 3V 35V 10V Contact closure
Installation
General
You should check your requirements against the model number before
installation. The sensor supply voltage is 12Vdc unless otherwise
specified (/FPS option).
Input connections
The input circuit has programmable trigger levels according to the
‘Input type’ setting.
For NAMUR sensors, 3-wire NPN sensors, 3-wire PNP sensors, NPN
open collector (O/C) outputs and PNP open collector (O/C) outputs set
the input type to “High Level DC” (
HIdC
).
For voltfree contact inputs use ‘Contact closure’ (
Con
). The minimum
contact closure time is 20mS and the maximum frequency is 10Hz.
For voltage pulses (including TTL/CMOS logic) select a suitable input
type using the trigger/reset voltage table.
Input voltages over 45Vdc
If the input voltage is above 45Vdc connect the internal high voltage
select jumper before applying the signal.
Noise
Make sure that you use shielded cable for low level signals and ground
the shield at the sensor end. If possible, amplify the signal at the
sensor - most low level sensors have an amplifier module available.
This is especially important for long runs and high frequency signals.
Digital pulse output
The basic model PTX800D has a retransmit pulse output, which gives
a single pulse every time the total increases by one unit. The pulse
width is a constant 32msec and the minimum off time is 32 msec.
The output is an isolated, NPN, open collector transistor type and can
switch a maximum of 50Vdc or a current up to 200 mA.
Reset pulse input
Accepts a volt-free contact closure, or a shorting link, between pins 7
and 12. The contact must be closed for at least 100 mS.
Alarm channels one and two (optional)
Alarm channels one and two have SPDT relay contact outputs. The
rated current decreases for inductive loads so using suppressor
capacitors is recommended. This will also reduce the general level of
electrical noise.
Connections
Pin
Signal
1
Neutral / – ve
Power supply
2
Live / + ve
3
Signal +ve
Analogue output (optional)
4
Signal -ve
5
0V
Pulse output
6
Pulse
7
Reset count
Short to 12 to reset
8
Security
Short to 12 for setup mode
9
Pull Up/Down
Inputs
10
Input – ve / 0 V
11
Input +ve
12
+12Vdc (out)
13
Normally Closed
Alarm one
(optional)
14
Common
15
Normally Open
16
Normally Closed
Alarm two
(optional)
17
Common
18
Normally Open
Analogue output (optional)
The analogue output provides you with a current or voltage based
signal that is proportional to the rate or total. For rate outputs, the
average value is the same as the rate, although the instantaneous
value may differ slightly for rapidly changing signals.
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PTX800D
Output calibration
General
The PTX800D analogue outputs are calibrated for a specific output
range and type. If you have changed the output range or type you
must follow the procedure given below.
Allow the instrument 15 minutes of powered operation (to reach a
stable temperature) before calibrating the output.
Equipment requirements
• An accurate digital multimeter (accurate to 0.05mV and ±0.1μA)
Terminal Connections for output calibration
Calibration Stage
Signal type
Terminal
Analogue Current Output
mA output +ve
3
mA output –ve
4
Analogue Voltage Output
V output +ve
3
V output –ve
4
Procedure
Note: the procedure below shows calibration for the commonly used
4-20mA format. If you have set the outputs to any other format, the unit
will prompt you with the output high and low values you have chosen.
When the
display shows
Action/Description
Put the instrument in setup mode and scroll through the main menu
CALOut_n
Press
ì
or
Å
CAlOut_y
Press
PGM
to select output calibration
Out_LO_=
Connect the multimeter to measure the output level, then press
PGM
4.00
Press
PGM
Measure the output signal
Adjust the output (using the
ì
or
Å
keys) until the output is at the value shown
When you are happy that the output is correct, press
PGM
Out_HI_=
Press
PGM
20.00
Press
PGM
Measure the output signal
Adjust the output (using the
ì
or
Å
keys) until the output is at the value shown
When you are happy that the output is correct, press
PGM
Save
Continue with the setup sequence.
Note: Do not remove the power while the save message is on display.
Modifi cations
Analogue output type
The analogue output type (current/voltage) is set by internal push fit
jumper. To change the output type:
Change the output type push fit jumper:
1. Gently remove the backplate (it is held in place by four lugs).
2. Slide the electronics from the housing.
3. Change the jumper location to the required setting (see diagram
above).
4. Look inside the housing and note that there are connectors that
mate with the display board.
5. Slide the electronics gently back into the case. Carefully moving the
board until the keypad connectors engage with the display board.
6. Replace the backplate.
Change the output type in the software:
1. Power up the instrument and start the setup routine.
2. While the software version number is flashing, remove the security
link and press
PGM
.
3. The display will show
Aout_=_y
. Press
PGM
.
4. The display will show
Aout=volt
or
Aout=_cur
. Select using up
Aout=_cur. Select using up Aout=_cur
or down key.
5. Replace the security link and press
PGM
.
Change the output range settings:
6. Scroll through the setup and change the output type and range
settings - you will be required to calibrate the outputs.
Calibrate the output:
7. Calibrate the outputs to the new output range and type.
High/Low voltage input selection
1. Gently remove the backplate (it is held in place by four lugs).
2. Slide the electronics from the housing.
3. Change the High/Low voltage jumper to the required setting (see
diagram right).
4. Look inside the housing and note that there are connectors that
mate with the display board.
5. Slide the electronics gently back into the case. Carefully moving the
board until the keypad connectors engage with the display board.
6. Replace the backplate.
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Q UICKSTART GUIDE
PTX800A
QS61001051 • 12/2005
Operation
General
The PTX800A is a scalable totaliser/rate indicator for analogue rate
signals. It will display either the rate or total according to setup. The
other value is displayed when you hold down the TOTAL/RATE key.
For more complex applications, the PTX800A can be supplied with
two alarm channels and/or an analogue re-transmit output.
Alarm conditions are indicated by the LEDs above buttons marked AL1
(for alarm channel one) and AL2 (for alarm channel two).
Manually clearing tripped alarms
The alarm channels can be set for automatic or manual reset. For
manual reset, the LED will flash when an alarm trips. These alarms will
only clear if you have acknowledged the alarm and the trip condition
has cleared. Press AL1 or AL2 to acknowledge the alarm.
Viewing the alarm setpoints
Press the AL1 or AL2 at any time to display the setpoint for that
channel. The value will be shown for 5s. If the alarms are disabled,
pressing the key will have no effect.
Changing the alarm setpoints
Press PGM while the setpoint is on display (see above), you will be able
to change the value using the ìand Åkeys. To save the changes,
press PGM. Note: you can disable this feature during setup for greater
security.
Checking the Rate/Total
You can set up the PTX800A to show either total or rate. If the total
is normally on display, you can check the rate by holding down the
TOTAL/RATE key.
Resetting the total
If you press the RESET key, the PTX800A will set the total to zero and
clear any total alarms (you can disable this feature during setup for
greater security). There is also an external reset input that you can use
to clear the total remotely.
Reviewing the setup options
To review the setup (in read only mode) press the PGM key. The
PTX800A will show the software version number. Press the Åkey to
see the next setting. The information in review mode is shown in the
same order as setup mode (however decimal point and some disabled
feature information will be skipped).
There is a 10s timeout during review mode or you can press PGM again
to return the display to normal operation.
You can review the setup while the instrument is in service - the unit
will continue to operate normally. Setup mode
Changing the setup options
Use setup mode if you have to change a setting or calibrate the
outputs. The setup mode stops all operation. As soon as you have
setup the last parameter, the unit behaves as if it has been switched on
with the new settings. This does not mean that the total is reset - you
must do this yourself if necessary.
PTX800A
Analogue output
(gives rate or total)
Pulse Output
Analogue (mA or V)
Rate Input
Total or
Rate Display
Power for Input device
Reset Pulse Input
Alarm 2
Power
Supply
Alarm 1
If you want to abandon all the changes you have made, simply remove
the security link (or remove the power) before the save message is
shown.
To change the instrument setup:
1. Connect the security link (short pins 8 & 9).
2. Press the PGM key.
The setup sequence is shown in the table on page two.
Setup options
General
There are four basic areas of the instrument operation that must be
setup on a fully configured PTX800A. They are:
• Analogue Current/Voltage inputs;
• Display and keypad operation;
• Alarms one and two (optional); and
• Analogue outputs (optional).
You can disable the alarms and/or analogue outputs if you do not need
them (if so their settings will not be displayed).
Software version
The information in this guide refers to versions 1.00 to 1.11.
Input signal type and range
You can not change the input type during set-up mode. The input is
either current or voltage according to the components used when the
unit was built.
The input range is determined by the values supplied during
calibration. So, if you change the range displayed in setup, you will
have to calibrate the inputs.
Damping Factor
The PTX800A uses digital filtering to smooth the input signal. The
damping factor sets the amount of filtering from minimum damping
(factor of one) to the maximum (factor of ninety nine).
Transfer Function
To use the PTX800A with square law rate measuring devices, like
differential pressure cells, set the transfer function to square law.
Otherwise use a linear setting. For more complex relationships
between rate and signal level you can use a CLC/AR to linearise your
input signal.
Low cut-out rate
To prevent accumulated errors at low input levels, you can set a low
cut-out rate. When the input is below this value the total does not
increase.
Total decimal point
The total decimal point position sets the number of decimal places for
the total display. Totals are displayed using the full eight digits.
Rate decimal point
Sets the number of decimal places for the rate display. Rates are
displayed as five digit numbers.
Total scaling factor
The total scaling factor sets the ratio between the total display and the
rate display. It must be a power of ten (i.e., 1000,100, ..., 0.01, or 0.001).
Number of samples
The PTX800A calculates the rate every 260mS. The analogue output
and display are then updated from the average over the programmed
number of samples. For example, if you set the number of samples to
10, the analogue output and rate display will be updated every 2.6s.
Rate timebase
The rate timebase setting sets the timebase for the rate display. It can
be set to days, hours, minutes or seconds.
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PTX800A
Setup Sequence
Setting Display Description Å ì PGM
S/W Version vEr_1.01 S/W Version 1.01 - - Next
Inputs
Input type InP=Cur
InP=voLt
Current (mA) based signal
Voltage based (V) based signal Toggle Accept
Input range
low value
InpLO=
4.00
Introduces Input low value
Value, e.g., 4.00mA
-
Dec
-
Inc
Next
Accept
Input range
High value
InpHI=
20.00
Introduces Input high value
Value, e.g., 20.00mA
-
Dec
-
Inc
Next
Accept
Input Calibra-
tion?
CALInY
CALInn
Calibrate the inputs
Skip Input calibration Toggle Accept
Damping
Factor
dFaCtor=
2
Introduces Input damping factor
Damping Factor , e.g., 2
-
Dec
-
Inc
Next
Accept
Transfer
Function
LinEAr
SQrroot
Linear
Square root Toggle Accept
Total and rate display settings and scaling
Rate decimal
point
tot_dp=
12.345
Introduces rate decimal point
Demo, e.g., rate shown to 3 decimal places
-
Shift
-
Shift
Next
Accept
Rate timebase
rate_SEC
rate_min
rate_Hr
rATe_day
Rate is in units per second
Rate is in units per minute
Rate is in units per hour
Toggle Accept
Rate Range
rAtELO=
0.00
Introduces rate low value
Value, e.g., 0.00%
-
Dec
-
Inc
Next
Accept
rAtEHI=
100.00
Introduces Input high value
Value, e.g., 100.00%
-
Dec
-
Inc
Next
Accept
Cut-out rate rateCut=
1.00
Introduces the low cut-out rate
Value, e.g., 1.00%
-
Dec
-
Inc
Next
Accept
Show rate or
total
dis=rate
dis=tot
Display normally shows the rate
Display normally shows the total Toggle Accept
Total decimal
point
tot_dp=
1234.5
Introduces total decimal point
Demo, e.g., total shown to one decimal place
-
Shift
-
Shift
Next
Accept
Total scaling
factor
tot_sf=
1
Introduces total scaling factor
Value, e.g.,total units = rate units
-
x0.1
-
x10
Next
Accept
Reset key enable
Reset Total Key
Enable
En_resY
En_resn
RESET key resets count
RESET key ignored Toggle Accept
Alarm enable
Alarms 1 & 2
Select
AL=Yes
AL=NO
Enable
Disable (Select this option for PMX420) Toggle Accept
Alarm channel one settings
Coil energisa-
tion
A1_nor_E
A1_nor_d
Normally energised
Normally de-energised Toggle Accept
Alarm one type A1=_rate
A1=_tot_
Channel one monitors total
Channel one monitors rate Toggle Accept
Alarm one
action
A1=_LO
A1=_HI
Low type (active below setpoint)
High type (active above setpoint) Toggle Accept
Setpoint value Set_Pt1=
50.00
Setpoint value
e.g., 50.00%
-
Dec
-
Inc
Next
Accept
Deadband
value
dband_1=
0.01
Deadband value
e.g., 0.01%
-
Dec
-
Inc
Next
Accept
Timer delay delay_1=
20
Timer delay (set to 0s to disable)
e.g., 20s
-
Dec
-
Inc
Next
Accept
Alarm channel two settings
As above As channel one (except uses A2_nor_E, A2=_rate,..., delay_2=)
General alarm settings
Setpoint
security
SECure_y
SECure_n
Setpoints fixed at setup
Can change setpoints Toggle Accept
Alarm reset
sequence
reS_Auto
rES_Oper
Automatic reset
Manual reset Toggle Accept
Analogue output settings (not shown unless outputs are fitted)
Output type Out=_Cur
Out=volt
Current (mA) output
Voltage ( V) output Toggle Accept
Output type Out=_Cur
Out=volt
Current (mA) output
Voltage ( V) output Toggle Accept
Output range
Out_LO=
4.00
Introduces output low value
Value, e.g., 4.00mA
-
Dec
-
Inc
Next
Accept
Out_HI=
20.00
Introduces output high value
Value, e.g., 20.00mA
-
Dec
-
Inc
Next
Accept
Output Action Out_dir
Out_rev
Direct (proportional) output
Reversed (inverted) output Toggle Accept
Calibration options
Calibrate
Output?
CalOut_n
CalOut_y
Skip output calibration
Calibrate outputs Toggle Accept
Display
Intensity
Intens_=
234567.89
Introduces the display intensity
Demo display for adjustment
-
Dec
-
Inc
Next
Accept
Save values SAVE Instrument is saving the changes to the setup and returning to
normal operation
Display rate or total
Use the display rate/total setting to choose the measurement that will
normally be on display.
Enable Reset key
The front panel reset key can be used to reset the total. You can
disable this feature (for added security) using this setting.
Alarms disable/enable
If you do not need alarms, you can disable them. This simplifies the
setup process, as all of the parameters related to the alarm operation
are skipped.
Alarm type
Each alarm channel can monitor the total or the rate. Total alarms
operate when the setpoint is exceeded. A ‘total’ alarm trip condition
clears when the total is reset.
Setpoint
The setpoint is the display value at which an alarm activates. It can be
changed during normal operation if the setpoint security option is off.
Alarm action
High alarms are active above the setpoint and low alarms are active
below the setpoint. Total alarms are always ‘high’ type, so this setting
is not shown.
Deadband
This parameter sets the “hysteresis” for an alarm channel; the alarm
will clear above or below the setpoint to prevent chatter when the
rate level passes the setpoint. The minimum deadband is one display
count. Total alarms do not need a deadband setting.
Alarm output energisation options
There are many applications where it is important to raise an alarm
if the instrument power supply is cut off. Normally energised coil
operation allows for this application.
Alarm timer delays
Sets the minimum time that an alarm condition must be present to be
recognised.
Setpoint security
You can change the setpoints from the front panel. If you want to
disable this feature, switch on the setpoint security.
Alarm reset sequence
Alarms normally reset automatically when a trip condition has passed.
Manual reset requires the operator to press the appropriate key before
the alarm will clear. The alarm status LED flashes until the alarm is
acknowledged and then remains on until the trip condition is gone.
Analogue output type and range
The output type (current/voltage) is like the input type as it is set by
manufacturing. The output range parameters let the PTX800A show
the output range correctly during review mode and prompt for the
correct values during calibration. They have no affect on the operation
of the instrument. If you change them you must be prepared to
calibrate the outputs.
Output Action
Direct action results in the normal, proportional output. Reverse action
gives an output that is inverted with respect to the rate, so a rate of
zero gives a full scale output and vice versa.
Display Intensity
There are fourteen different levels.
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PTX800A
Installation
General
You should check your requirements against the model number before
installation. The sensor supply voltage is 12Vdc unless otherwise
specified (/FPS option).
Noise
Make sure that you use shielded cable and ground the shield at the
sensor end.
Digital pulse output
The basic model PTX800A has a retransmit pulse output, which gives
a single pulse every time the total increases by one unit. The pulse
width is a constant 32msec and the minimum off time is 32 msec.
The output is an isolated, NPN, open collector transistor type and can
switch a maximum of 50Vdc or a current up to 200 mA.
Reset pulse input
Accepts a volt-free contact closure, or a shorting link, between pins 7
and 12. The contact must be closed for at least 100 mS.
Alarm channels one and two (optional)
Alarm channels one and two have SPDT relay contact outputs. The
rated current decreases for inductive loads so using suppressor
capacitors is recommended. This will also reduce the general level of
electrical noise.
Analogue output (optional)
The analogue output provides you with a current or voltage based
signal that is proportional to the rate. The average output value is the
same as the rate, although the instantaneous value may differ slightly
for rapidly changing signals.
Connections
Pin Signal
1 Neutral / – ve
Power supply
2 Live / + ve
3 Signal +ve
Analogue output (optional)
4 Signal -ve
5 0V
Pulse output
6 Pulse
7 Reset count Short to 8 to reset count
8 Common
9 Security Short to 8 for setup mode
10 Input – ve / 0 V
Inputs11 Input +ve
12 +24Vdc (out)
13 Normally Closed
Alarm one
(optional)
14 Common
15 Normally Open
16 Normally Closed
Alarm two
(optional)
17 Common
18 Normally Open
Calibration
General
The PTX800A analogue outputs and Inputs are calibrated for a specific
range and type. If you have changed the range or type you must follow
the appropriate procedure.
Allow the instrument 15 minutes of powered operation (to reach a
stable temperature) before calibration.
Note: the procedures below shows calibration for the commonly used
4-20mA format. If you have chosen another format, the unit will prompt
you with the high and low values you have selected.
Equipment requirements
• An accurate digital multimeter (accurate to 0.05mV and ±0.1μA)
• Suitable current/voltage source (accurate to 0.05mV and ±0.1μA)
Output Calibration
Terminal Connections for output calibration
Calibration Stage Signal type Terminal
Analogue Current Output mA output +ve 3
mA output –ve 4
Analogue Voltage Output V output +ve 3
V output –ve 4
Procedure
When the
display shows Action/Description
Put the instrument in setup mode and scroll through the main menu
CALOut_n Press ìor Å
CAlOut_y Press PGM to select output calibration
Out_LO_= Connect the multimeter to measure the output level, then press PGM
4.00
Press PGM
Measure the output signal
Adjust the output (using the ìor Åkeys) until the output is at the value shown
When you are happy that the output is correct, press PGM
Out_HI_= Press PGM
20.00
Press PGM
Measure the output signal
Adjust the output (using the ìor Åkeys) until the output is at the value shown
When you are happy that the output is correct, press PGM
Save Continue with the setup sequence.
Note: Do not remove the power while the save message is on display.
Input Calibration
Terminal Connections for Input calibration
Calibration Stage Signal type Terminal
mA/Voltage Signal Source Signal +ve 11
Signal –ve 10
Procedure
When the
display shows Action/Description
Put the instrument in setup mode and scroll through the main menu
CALIn_n Press ìor Å
CAlIn_y Press PGM to select Input calibration
InP_LO_= Connect the multimeter to measure the Input level, then press PGM
4.00 Set the Input signal to the appropriate value, e.g., 4.00mA
When you are happy that the Input is correct, press PGM
Inp_HI_= After approx 5s the display introduces the next calibration point. Press PGM
20.00 Set the Input signal to the appropriate value, e.g., 20.00mA
When you are happy that the Input is correct, press PGM
dFactor= Continue with the setup sequence.
Note: Do not remove the power while the save message is on display.
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PTX800A
Modifications
Analogue output type
The analogue output type (current/voltage) is set by internal push fit
jumper. To change the output type:
Change the output type push fit jumper:
1. Gently remove the backplate (it is held in place by four lugs).
2. Slide the electronics from the housing.
3. Change the jumper location to the required setting (see diagram
above).
4. Look inside the housing and note that there are connectors that
mate with the display board.
5. Slide the electronics gently back into the case. Carefully moving the
board until the keypad connectors engage with the display board.
6. Replace the backplate.
Change the output type in the software:
1. Power up the instrument and start the setup routine.
2. While the software version number is flashing, remove the security
link and press PGM.
3. The display will show a number as shown in the table below.
Number 012345
Input Type mA Volt mA Volt mA V
Output type mA mA Volt Volt None None
4. Change the number to suit your input and output types.
5. Replace the security link and press PGM.
Change the output range settings:
6. Scroll through the setup and change the output type and range
settings - you will be required to calibrate the outputs.
Calibrate the output:
7. Calibrate the outputs to the new output range and type.
PTX800 analogue output board showing output type jumper locations.
Link both pairs
of posts for
voltage outputs
R3
PTX800A main board showing the location of the high voltage input select
jumper and the analogue output board.
Analogue
Output
Board
R1
R2
Display Board
Input Type Selection
Input type selection is similar to output type selection except that the
input type is determined by the values of components on the main
board. You can either return the unit to the factory for modification or
change the components on the main PCB:
To change the input type:
Change the values of R1, R2, R3:
1. Gently remove the backplate (it is held in place by four lugs).
2. Slide the electronics from the housing.
3. Change the components to the required values:
Input range R1 R2 R3
-24 to +24mA 22Ω 68kΩ Omit
-11 to +11V Omit 1MΩ 47kΩ
(see diagram below for location).
4. Look inside the housing and note that there are connectors that
mate with the display board.
5. Slide the electronics gently back into the case. Carefully moving the
board until the keypad connectors engage with the display board.
6. Replace the backplate.
Change the Input type in the software:
1. Power up the instrument and start the setup routine.
2. While the software version number is flashing, remove the security
link and press PGM.
3. The display will show a number as shown in the table below.
Number 012345
Input Type mA Volt mA Volt mA V
Output type mA mA Volt Volt None None
4. Change the number to suit your input and output types.
5. Replace the security link and press PGM.
Change the output range settings:
6. Scroll through the setup and change the input type and range
settings - you will be required to calibrate the Inputs.
Calibrate the input:
7. Calibrate the inputs to the new output range and type.
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