Omega DPS3301 User Manual
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DPS3301
Series
Wall-Mount Programmable
Temperature Monitor
SPECIFICATIONS.......................................................................................................................................................... 4
DESCRIPTION................................................................................................................................................................ 5
THERMOCOUPLE OR RTD SELECTION................................................................................................................. 5
HOW TO RESET AND PROGRAM THERMOCOUPLE TYPE (OR RTD).................................................................................. 6
FIGURE 1. THERMOCOUPLE/RTD SELECTION KEYS ..................................................................................................... 6
DISPLAY MODES........................................................................................................................................................... 6
RETAINING USER SETTINGS ON POWER DOWN................................................................................................ 7
DISPLAY UNITS C/F:.................................................................................................................................................... 7
SETPOINT DEVIATION: .............................................................................................................................................. 7
DISPLAY HOLD FEATURE: ........................................................................................................................................ 7
FLOW CHART ................................................................................................................................................................ 8
SETUP MODE................................................................................................................................................................. 9
ENTERING AND EXITING SETUP MODE:.......................................................................................................................... 9
HOW TO INCREASE/DECREASE PROGRAMMABLE VALUES IN SETUP .............................................................................. 9
PASSCODE ENTRY:..........................................................................................................................................................9
'PROGRAM CONTROLLER' MODE........................................................................................................................ 10
DISPLAY TIME............................................................................................................................................................... 10
DISPLAY OPTION:.......................................................................................................................................................... 10
RATE TIME-BASE:......................................................................................................................................................... 10
COLD JUNCTION ADJUSTMENT: ..................................................................................................................................... 11
THERMOCOUPLE CALIBRATION:.................................................................................................................................... 11
THERMOCOUPLE TYPE SELECTION: ............................................................................................................................... 12
‘PROGRAM LIMITS’ MODE:.................................................................................................................................... 12
PROCESS LIMITS (1 THRU 4):......................................................................................................................................... 12
SELECTION OF LIMIT 3 AS PROCESS OR RATE LIMIT:..................................................................................................... 12
PROGRAMMING LIMIT 3: ............................................................................................................................................... 13
As Process Limit:...................................................................................................................................................... 13
As Rate Limit:........................................................................................................................................................... 13
SELECTION OF LIMIT 4 AS PROCESS OR DEVIATION LIMIT: ........................................................................................... 13
PROGRAMMING LIMIT 4: ............................................................................................................................................... 13
As Process Limit:...................................................................................................................................................... 13
As Deviation Limit:................................................................................................................................................... 13
CONFIGURE TIMING MODE............................................................................................................................................ 13
TIMERS 1 AND 2: ........................................................................................................................................................... 14
RELAY DEADBAND: ...................................................................................................................................................... 14
CONFIGURING LIMITS NORMALLY OPEN/NORMALLY CLOSED:.................................................................................... 14
RELAY LATCHING/NON LATCHING:............................................................................................................................... 14
AUDIO ALARM ON/OFF:................................................................................................................................................ 15
RATE............................................................................................................................................................................... 15
RATE ALARM:............................................................................................................................................................... 15
RESETTING RATE ALARM: ............................................................................................................................................ 15
SETPOINT DEVIATION ALARM: ............................................................................................................................ 15
DEVIATION ALARM:...................................................................................................................................................... 16
RESETTING DEVIATION ALARM:...................................................................................................................................16
PROCESS ALARMS.....................................................................................................................................................16
DISPLAYING:................................................................................................................................................................. 16
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RESETTING:................................................................................................................................................................... 16
ELECTRO-MECHANICAL RELAY OPTION ....................................................................................................................... 16
Figure 2. Electro-mechanical Relays Hookup Example........................................................................................... 17
OPEN COLLECTOR OPTION............................................................................................................................................ 17
Figure 3. Open Collector Hookup Example............................................................................................................ 17
TIMERS.......................................................................................................................................................................... 17
RESETTING TIMERS:...................................................................................................................................................... 18
TIMER MODES............................................................................................................................................................. 18
TIMER MODE #0............................................................................................................................................................ 18
TIMER MODE #1............................................................................................................................................................ 18
TIMER MODE #2............................................................................................................................................................ 18
ELAPSED TIME........................................................................................................................................................... 18
HOW TO RESET ELAPSED TIME...................................................................................................................................... 18
HIGH AND LOW PEAKS ............................................................................................................................................ 19
HOW TO RESET HIGH & LOW PEAK READINGS.............................................................................................................. 19
OUTPUT STATUS:........................................................................................................................................................ 19
POWER........................................................................................................................................................................... 19
SIGNAL CONNECTION.............................................................................................................................................. 19
OUTPUT CONNECTOR PIN ASSIGNMENT.......................................................................................................... 20
TABLE 1. OUTPUT CONNECTOR PIN ASSIGNMENT...................................................................................................... 20 T
FIG 4. DPS3301 SERIES TERMINAL COMPARTM E NT...................................................................................... 21
DIRECT INTERFACE TO UNIVERSAL RELAY MODULE................................................................................. 21
DIRECT INTERFACE TO UNIVERSAL RELAY MODULE................................................................................. 22
MOUNTING................................................................................................................................................................... 23
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SPECIFICATIONS
Typical @ 25 C and rated supply voltage unless otherwise specified.
INPUTS:
• Input types: J,K,T,E,R,S,B t/c, RTD, Voltage, Millivolt, Current & thermistor
• Cold junction compensation error: +/- 0.5C max (10C to 40C)
• Open thermocouple indication: ‘OPEN TC’ displayed
OPTIONS:
• 240Vac @ 50 Hz Power Supply
• 15Vdc @ 1000ma. Power Supply
• Open Collector output: 6 open collector transistors @ 50ma. sink each
• Relay output: 6 SPST 1 Amp. @ 28Vdc, 0.5 Amp. @ 120Vac (resistive load)
(for 220 Vac units only 0.25Amp.@ 240Vac (resistive load))
ACCURACY:
• Temperature resolution: 1 C/1 F, 0.1C for Thermistor
• 0.1% of Full Scale (Base metal T/C), 0.5% others
ANALOG TO DIGITAL CONVERSION:
• 4 1/2 Digit (20000 count) A/D conversion.
• Dual slope integrating converter.
• Conversion Rate: 7 /sec. typical
POWER REQUIREMENTS:
• 120Vac, 0.2 Amp. @ 60 Hz
DIMENSIONS:
• Case: 7.55"W x 6.29"H x 4.05"D
•
IP65 rated plastic enclosure
• Weight: 2.63 lb. (1.19kg.)
• Enclosure: All Plastic enclosure—IP65 Ingress Protection
DISPLAY:
• Red 7-segment LED display, 0.39 inch (10mm) digit height
• Negative polarity indication
• Out of range indication: HELP
• Display Test: Briefly displays 8.8.8.8.8.8.8. on power up
RELIABILITY:
• Calibration: NIST traceable
• Recalibration: Recommended at 12 months interval
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DESCRIPTION
Housed in a wall-mount, water-tight plastic enclosure, the DPS3301 Series is a powerful temperature
monitor/indicator. It accepts a single Thermocouple, RTD or Thermistor sensor input and then displays the
temperature in either degrees C or F. In addition, it also monitors a number of useful functions such as high
and low process readings, process run time, rate of process change etc.
Keys are appropriately labeled, so that the user would not have to memorize their functionality. A passcode
requirement keeps unauthorised personel from changing critical parameters such as limits, timers etc.
The DPS3301 also functions as a rate monitor, indicating instantaneous as well as average rate of
temperature change. Programmable time base allows the rate to be displayed in per second, minute, hour or
any other interval. Also, the unit can be programmed for a rate alarm. This allows control of a process if a
predetermined rate is exceeded or not achieved. The time function keeps track of process run time.
Maximum and minimum temperature readings are constantly tracked and can be helpful in quality control or
monitoring unattended processes (e.g. overnight).
Various process parameters monitored by the system may be displayed by pushing the appropriate keys on
the front panel, e.g. (Rate, Peak etc.). The respective parameter will be displayed as long as the key is kept
pressed. Alternately, if the key is pressed and then released, the unit will display a particular parameter
briefly and then go back to temperature display mode.
Four process alarms (optional) are also featured, which are programmable over the entire range of selected
input type. Also provided are two timers (optional) that work independently or in conjunction with process
limits e.g. turning on a fan ten minutes after limit 1 temperature is reached.
Process limit relays may be operated in two different modes:
1. Non-latching mode, in which the relays reset automatically as soon as the temperature
falls below the limit (minus the relay dead-band).
2. Latching mode, in which the relays stay energized even after the temperature falls below
the programmed limit. In this mode the relays will stay on until manually reset.
THERMOCOUPLE OR RTD SELECTION
DPS3301 instruments ordered for Thermocouples or RTD’s can be programmed through the front panel keys
to work with one of these specific inputs (Input type or options depend on Model number ordered).
When DPS3301 is first turned on, a ‘display segment test’ is done by briefly displaying 8.8.8.8.8.8.8.,
followed by the software revision number (rEn X.XX) and input signal type.
J (R,S,B, rtd 385, Thermistor, J tC (r, S, B, rtd 385, tHrStor,
Millivolt, Voltage, Current) Lo VoLt, HI VoLt, CurrEnt)
K (rtd 392) Cr.AL tC (rtd 392)
T t tC
E E tC
Factory default thermocouple/RTD selection can be obtained as explained below:
Input type Display shows:
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r
How to Reset and Program Thermocouple Type (or RTD) How to Reset and Program Thermocouple Type (or RTD)
A DPS3301-TC that is calibrated for a J, K, T, or E type thermocouple or an RTD model may be
A DPS3301-TC that is calibrated for a J, K, T, or E type thermocouple or an RTD model may be
programmed for a specific thermocouple, or RTD (385/392) type, by going into SETUP mode (Look under
programmed for a specific thermocouple, or RTD (385/392) type, by going into SETUP mode (Look under
‘SETUP’). Alternately, a thermocouple/RTD may be selected by turning
‘SETUP’). Alternately, a thermocouple/RTD may be selected by turning
in the appropriate key (see Figure 1). This procedure also clears the memory and programs factory defalult
values for limits, rate timebase etc. Therefore, after performing Power-up reset, various parameters such as
limits, rate time base etc., must be re-programmed to a desired value. However, if done in SETUP mode, no
programmed parameters such as limits, Timers etc. are erased from the memory.
thermocouple (RTD) selection be done in SETUP. Power-up reset should be performed if it is suspected that
program memory may have been corrupted due to power surge, noise on electrical lines etc.
FIGURE 1. Thermocouple/RTD Selection Keys
Memory Clear only T t/c
E t/c
K t/c, RTD392,
Thermisto
J (R, S or B) t/c,
RTD385
On
On power to the unit while holding
It is recommended that
KEY Input Type Selected
HI/LO J (R, S or B , RTD 385)
Thermistor
C/F K (RTD 392)
ALARM T
TIMER E
RESET Memory cleared – no
factory default values
. programmed.
NOTE: All keys, except RESET, clear
memory and program necessary factory
default values. RESET key clears memory
only and programs no default values.
However, previous thermocouple type is
retained.
DISPLAY MODES
The DPS3301 can be programmed to display in any one of the following modes:
Mode Display Description
PROCESS PrOCESS
SETPOINT DEVIATION SP. DEVN
INSTANTANEOUS RATE In. rAtE
PROCESS HIGH Pr. HIGH Displays process’ highest reading
PROCESS LOW Pr. LO Displays process’ lowest reading
ELAPSED TIME ELPSd. T Displays elapsed time.
TIMER 1 COUNT DOWN tr1. Cnt Display Timer 1 count down value
TIMER 2 COUNT DOWN tr1. Cnt Display Timer 2 count down value
SCAN SCAn Scans through all the above parameters
Displays Instantaneous rate value.
Displays process value.
Displays setpoint deviaition.
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SEE SETUP ON HOW TO SELECT ONE OF THE DISPLAY MODES.
RETAINING USER SETTINGS ON POWER DOWN
DPS3301 saves all the programmed parameters in an EEPROM (electrically erasable programmable read
only memory). An EEPROM stores the programmed parameters even when the power is removed from the
unit. However, it is important to note that if the parameters are being changed during setup, they must be
saved in the EEPROM by
under SETUP. If parameters are
values will be lost ( the unit will, however, maintain the old values).
pressing and holding the ‘RESET’ key (till SAVING is displayed) as described
NOT saved and the power is removed from the unit, any newly changed
DISPLAY UNITS C/F:
DPS3301 units can display temperature in either degrees
Centigrade of Fahrenheit. To switch the display from Fahrenheit
to Centigrade or vice versa, simply push the C/F key once. The
display will read ‘dEGrE F’ if the unit enters degrees Fahrenheit
mode. It will display ‘dEGrE C’ if Centigrade mode is enabled.
Following the message, the unit will start displaying temperature
in selected engineering units.
SETPOINT DEVIATION:
A useful feature of DPS3301 units is tracking of a setpoint
relative to process value at any given point in time. To display
deviation, push the key labeled ‘SP DEV’ once. The display will
read ‘SP DEVN’ following which the deviation reading will be
shown. A second push on the same key while it is displaying
deviation will indicate the current setpoint value.
Setpoint value that needs to be tracked can be entered in two
different ways. One is during setup mode and the other is using
the front key labled ‘SP DEV’. SETUP mode entry is used when
a particular value needs to be programmed e.g. 500, 850 and so
on. To enter Setpoint in this mode, look under ‘SETUP’.
If it is desired to start tracking setpoint deviation from
used. Assume that current reading on the display is 476 F. To enter this temperature as your setpoint, first
push ‘SP DEV’ key twice (first push displays deviation from current setpoint, and the second push displays
current SETPT value). After the second push keep
display will flash the message ‘SETPT’ three times. Following the third flash, the unit will take the current
process reading and save it as the new SETPOINT. If the process reading is 500, then taking our above
example, pushing ‘SP DEVN’ key will display 24 as your deviation value. Note that if ‘SP DEVN’ key is
released before three flashes of ‘SETPT’ message, the unit will not enter a new setpoint. However, old
setpoint value will be retained in the memory.
current process reading then front key entry mode is
holding in the ‘SP DEV’ key. After a brief delay the
DISPLAY HOLD FEATURE:
DPS3301 offers a display hold feature. When ever pins 13 and 14 are shorted together (e.g. through a remote
switch), the reading taken at the time of shorting is frozen on the display. The unit will continue displaying
this value until the short is removed. This is indicated by the display periodically flashing the message ‘Pr
HoLD’. Internally the unit keeps monitoring the actual process and limits and timers will be activated if
process exceeds their programmed values. However, the display will indicate the hold temperature.
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FLOW CHART
PROGRAM LIMITS
PROGRAM LIMIT1
PROGRAM LIMIT2
Configure Limit3 as
Process or Rate
PROGRAM LIMIT3
Configure Limit4 as
Process or Deviation
PROGRAM LIMIT4
SETUP
PROGRAM
CONTROLLER
SETPT
DISPLAY TIME
DISPLAY OPTION
a. Process
b. Setpt Devn.
c. In. Rate
d. Process High
e. Process Low
f. Elapsed Time
g. Timer 1 Count
h. Timer 2 Count
i. Scan all
Select Timer Modes
0,1 or 2
PROGRAM TIMER1
PROGRAM TIMER2
RELAY DEADBAND
Limit1 Normally open
or closed
Limit2 Normally open
or closed
Limit3 Normally open
or closed
Limit4 Normally open
or closed
RATE
TIMEBASE
COLD JUNCTION
CALIBRATION
INPUT
CALIBRATION
INPUT
SIGNAL TYPE
Back to
SETUP
Limits Latching or
Non-Latching
Audio Alarm ON or
OFF
Back to
SETUP
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