RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument

RTD Input Process Indicator Model DIS873


CONNECTIONS

Output - (Optional)
Output + (Optional)
NC
Input +
Input -
Shield
Alarm 1 NC (Optional)
Alarm 1 C (Optional)
Alarm 1 NO (Optional)
Alarm 2 NC (Optional)
Alarm 2 C (Optional)
Alarm 2 NO (Optional)
Power AC L1
Power AC L2
(Terminal Labeled)

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RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument

RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Catalogue
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Manual


RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument


Features

RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Provides 3 1/2 Digit, Red or Green LEDs
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Display Calibrated in Engineering Units (C,F,K, etc.) Proportional to an RTD Input
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument 3-Wire or 2-Wire, 10 ohms to 2000 ohms RTDs
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Linearized for Platinum RTDs
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Fully Isolated Output and/or 0, 1, or 2 Alarms
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Alarm Setpoints Adjustable Without Disturbing Transmitter Output
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Fail-safe Alarm Operation
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument LED Alarm Status Indicator
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Adjustable Deadband
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Unlimited* Choice of Input/Output Ranges
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Fits Standard 1/8 DIN Cutout
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument Rated NEMA-4X, Waterproof and Corrosion Resistant When Properly Installed
RTD,Input,Process,Indicator,Model DIS873,Wilkerson Instrument 5 + 5 Year Warranty


Description

The DIS873 provides a display, optional isolated DC output voltage or current proportional to an RTD input signal, and optional alarm setpoints.  The units include filtering and conditioning to reduce susceptibility to transients and noisy operations.  The digital display utilizes an auto-zero dual-slope integrating A/D converter for accuracy and stability.

All controls are accessible by removing a gasketed front access panel. The display controls are wide ranging so that they can be calibrated to display engineering units. Decimal point selection is made with a switch, also accessible from the front. A complete set of engineering unit labels is sent with each DIS. Once the display has been adjusted to read the correct engineering units, the alarm setpoints can be adjusted without test equipment and without disturbing the output voltage or current.

Either setpoint may be displayed by use of the SP CAL switch. Each setpoint has an LED to indicate alarm status. The alarms have adjustable deadbands.  Terminations are made to a screw terminal connector on the rear of the case.

Typical Applications

Temperature indication, control, monitoring, data acquisition and warning for HVAC, pumps, motors, etc.

Mounting

The DIS is designed to be mounted from the front of a panel through a standard horizontal 3.62 x 1.77 (1/8 DIN) cutout. Two mounting cam-screws secure the DIS to the panel.

Specifications

RTD INPUT
3-Wire or 2-Wire
10 ohms to 2000 ohms

INPUT RANGE
select any range within RTD limit
  [min span 25F/14C]

EXCITATION CURRENT

10 ohms
100 ohms
1000 ohms
2000 ohms
10 mA
5 mA
0.5 mA
0.2 mA

OUTPUT RANGE
Voltage
  select any range between 10 V
    10 mA max load
    (min span 0.2 V)
Current
  select any range from 0 to 20 mA max
    24 V compliance**
    (min span 1 mA)

OPEN SENSOR OUTPUT
>= full scale

RELAY CONTACTS (spdt)
Resistive Load:
  5 A max, 150 W max,
  240 VAC max, 30 VDC max
Inductive Load:
  1/8 HP max at 120/240 VAC

SETPOINT
each alarm 0 to 100% of span

DEADBAND
0.25% to 100% of span

RESPONSE TIME
<= 100 ms
  (range dependent)

ISOLATION
Output/Input
  >500 megohms
Breakdown Voltage
  >600 VAC rms

 

DISPLAY
Digit Size
  .56 inch LED, 3 1/2 digits, 1999

Decimal Point
  1.9.9.9

Control Range
  Zero
    1999
  Span
    min span 10
    max span 2000

Display Update
  3/sec

ACCURACY
0.1% of span

LINEARITY
(Pt RTD, output vs temp)
0.05% of span
   (temp > = 32F/0C)
0.15% of span
  (temp < 32F/0C)

(others, output vs res)
0.01% (display)
0.05% (transmitter output)

Output
  0.025% of span

OUTPUT RIPPLE
<0.1% of span
  (peak to peak)

COMMON MODE REJECTION
120 dB, DC to 60 Hz

OPERATING TEMPERATURE
 14F to 140F
-10C to 60C

TEMPERATURE STABILITY
(0.02% of span +30 V)/C max

POWER
115 VAC 10%, 50/60 Hz
  (4 W max)
230 VAC 10%, 50/60 Hz
  (4 W max)

* Within specified range limits.

** Compliance:  The sum of the voltage drops in the output loop cannot exceed 24 V at rated current 
    (1200 ohms at 20 mA)