DIS978 Order Page

DIS978

DIS978
Strain Gauge (Bridge) Input
Process Indicator
4.5 Digit Display
With Optional Alarms
and Re-Transmit Output

$600.00

The following information must be entered to complete your order:
See "Specifications" below for Input, Output and Display range limits.

Power:
Input:	Zero Scale	Full Scale	Units
Display:	Zero Scale	Full Scale	Units (Optional)
	Display Action
Alarms:	Alarm Option
Output:	Output Action
(If Output Option Selected, Enter Output Values)	Zero Scale	Full Scale	Units

Features
Description
Specifications
Dimensions
Connections

Display Calibrated in Engineering Units (psi, kg, klb, etc.)
Proportional to a Strain Gauge Bridge Input
0.5 mV/V to 1 V/V Input Span
Fully Isolated Output and/or 0, 1, or 2 Alarms (Optional)
Alarm Setpoints Adjustable without Disturbing Transmitter Output
Fail-Safe Alarm Operation
LED Alarm Status Indicator
Adjustable Deadband
Unlimited Choice of Input / Output Ranges (Within specified range limits)
Fits Standard 1/8 DIN Cutout
Rated NEMA-4, Splashproof when Properly Installed
5 Year Warranty

The DIS978 provides a display, optional isolated DC output voltage or current proportional to the output of a strain gauge bridge, and optional alarm setpoints. All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptability to electrical noise and damage by lightning. The unit has a well regulated excitation voltage for the strain gauge and a high quality differential preamplifier to condition the low level output from the bridge. 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 a red 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

Weight and pressure indication, control, monitoring, data acquisition and warning.

INPUT SPAN
0.5 mV/V to 1 V/V

INPUT IMPEDANCE
200 kilohms

OPTION SA, DA SETPOINT
each alarm 0 to 100% of span

DEADBAND
0.25% to 100% of span

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

OPTION TX 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 (1200 ohms max at 20 mA)

OUTPUT RIPPLE
(Peak-to-Peak) <0.1% of span

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

EXCITATION
fixed 10 V, 40 mA max load

EXCITATION STABILITY
±0.005% / °C

RESPONSE TIME
>500 ms

ACCURACY
±0.1% of span

LINEARITY
Display ±0.01% of span
Output ±0.025% of span

DISPLAY
Digit Size .56" LED, 4½ digits, ±19999
Decimal Point ±1.9.9.9.9
Control Range
Zero ±19999
Span min span 100/max span 20000

DISPLAY
Update 3/sec

COMMON MODE REJECTION
120 dB, DC to 60 Hz

OPERATING TEMPERATURE
14°F to 140°F/–10°C to 60°C

TEMPERATURE STABILITY
±(0.02% of span + 1.3 μV)/°C max

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

DIN Mod Series Dimension Drawing

Terminal 1
Terminal 2
Terminal 3
Terminal 4
Terminal 5
Terminal 6
Terminal 7
Terminal 8
Terminal 9
Terminal 10
Terminal 11
Terminal 12
Terminal 13
Terminal 14

Output -
Output +
Excitation +
Excitation -
Input +
Input -
Alarm 1 NC
Alarm 1 C
Alarm 1 NO
Alarm 2 NC
Alarm 2 C
Alarm 2 NO
Power AC L1
Power AC L2

Specifications Manual

WILKERSON INSTRUMENT CO., INC.

DIS978 Strain Gauge (Bridge) Input Process Indicator 4.5 Digit Display With Optional Alarms and Re-Transmit Output

Input:

DIS978 Strain Gauge (Bridge) Input
Process Indicator 4.5 Digit Display
With Optional Alarms and Re-Transmit Output