Dwyer DSGT User Manual

Bulletin A-34-DSGT

Ø5-3/8 B.C.

[Ø136.4]

Ø

5-13/16

[

Ø147.6]

3

-29/32
[

99]

37

1/2 NPT

5/8˝ [15.8] ACROSS FLATS

(3) Ø1/4 [Ø6.3]

3-5/16

[83.8]

Ø5-3/16

[Ø131.8]

1

-1/2

[

38.1]

1-13/32

[35.6]

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66]

Series DSGT Digital Indicating Transmitter

Specifications - Installation and Operating Instructions

The Series DSGT Digital Indicating Transmitter is a versatile multi-

function process gage that features an excellent 0.25% F.S. accuracy.
This all-in-one digital gage package is designed to reduce installation
costs, instrument cost, and save space where an application requires a
gage, transmitter, and switches. The gage comes standard with a loop­powered 4-20 mA transmitter output and is offered with one or two
optional SPDT switches.

The DSGT gage is housed in a durable fiberglass reinforced thermo­plastic case that is designed to meet NEMA 4 (IP65) requirements. The
gage features a menu-driven display for easy customization. User selec­table features include 12 engineering units of measure, password pro­tected calibration and disable functions, as well as an adjustable bar
graph and update/dampening rates.

INSTALLATION

When installing the gage, use a 5/8˝ wrench on the wrench flat of the
gage to tighten the gage to the process. DO NOT tighten the connec­tion by applying torque to the gage body which could cause permanent
damage and render the gage inoperable. It is good practice to apply
pipe thread sealant tape or pipe thread sealant to the gage threads.

SPECIFICATIONS
Gage Specifications
Service: Compatible, non-combustible liquids & gases.
Wetted Materials: 17-4 SS sensor, 316 SS socket.
Housing Materials: Fiberglass reinforced thermoplastic case.
Accuracy: 0.25% F.S (Includes linearity, hysteresis, and repeatability).
Pressure Limit: 2 x F.S. range.
Process Connection: 1/2˝ male NPT.
Enclosure Rating: NEMA 4 (IP65).
Display: 5 Digit (0.88˝ high), 50,000 counts.

Transmitter Specifications
Accuracy: 0.25% F.S. (Includes linearity, hysteresis, and repeatability).
Temperature Limits: 14 to 140ºF (-10 to 60ºC).
Thermal Effects: 0.04% F.S./ºF.
Power Supply: 12-36 VDC (Loop Powered).
Output Signal: 4-20 mA.
Zero and Span: Menu Configurable.
Response Time: 100 ms.
Electrical Connections: 3 ft flying leads.
Loop Resistance: DC; 0-1090 ohms maximum.

Switch Specifications
Switch Type: 1 SPDT (-C1S option); 2 SPDT (-C2S option).
Repeatability: 0.25% F.S.
Electrical Rating: 1A @ 24 VDC or 0.5A @ 125 VAC.
Electrical Connections: 3 ft flying leads (See Wiring for details).
Power Requirements: 12-36 VDC (Separate line power).
Set Point Adjustments: Adjustable through menu selections.

Phone: [phone] www.dwyer-inst.com

DWYER INSTRUMENTS, INC.

P.O. Box 373 • Michigan City, IN 4636 U.S.A. Fax: [phone] e-mail: [e-mail]

DSGT KEYPAD OPERATION

ON
OFF

Z

ERO

CLEAR

MAX/MIN

M

MENU

E

ENTER

This button turns the gage on and off. When pressing the ON/OFF key while in the off position, the gage display will first indicate the
software version followed by the full-scale pressure range. The gage will then display the indicated pressure and be ready for use.

After power up and before the pressure is applied, this button will re-zero the gage from any initial zero shift. If the zero shift is greater
than programmed zero allowance, the gage display will show OFSET (blinking) for 1 second and then return to the measure mode.
The gage will auto advance once zeroed.
In the MAX/MIN mode the ZERO/CLEAR key will erase the stored minimum and maximum pressure values. To clear these values
press the ZERO/CLEAR key while the minimum or maximum value is being displayed.

The MAX/MIN button allows review of the minimum and maximum pressure values that have been measured since unit start-up or
since the values were last cleared. From the measurement mode, press the MAX/MIN key to:

1.) Indicate the maximum pressure

2.) Indicate the minimum pressure

3.) Exit Max/Min mode and return the gage to measurement mode.

The t (down arrow key) is used in the Menu mode. See the following MENU key section.

The MENU key allows for customization of the gage. Pressing the MENU key allows cycling through the main MENU items: UNITS,
CONFIG, GRAPH, OFF, and UPDAT & DAMP. Any item changed in the menu is saved as the new default setting(s) in the event of a
power loss.
The s (up arrow key) and t (down arrow key) allow for scrolling through the MENU options to increase or decrease numeric values as
required. While in the menu mode, the gage will automatically advance to the measurement mode once the selected MENU item has
been set.

This key manually turns the backlite on or off. There are five options available which include NEVER, 10 sec., 30 sec., 1 min., and 5
min. With the NEVER option selected the backlight will remain on while the gage is on or until this key is pushed again. The 10 sec.,
30 sec., 1 min., and 5 min. options allow the backlight to automatically turn-off after the selected period of time.
To use the BACKLITE option:

Step 1: Press the MENU key.
Step 2: Press the s (up arrow key) or t (down arrow key)
until the word LITE appears.
Step 3: Press ENTER.
Step 4: Press the s (up arrow key) or t (down arrow key)
to select the BACKLITE option.
Step 5: Press the ENTER key to finalize your choice of
LITE options.

This key allows for selecting gage features in the menu and sub-menus as well as finalizing the selections made. Use of the ENTER
key is described throughout this installation and operation manual.

ELECTRICAL CONNECTIONS

CAUTION: DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RAT-

INGS. PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL
RESULT. THIS UNIT IS NOT DESIGNED FOR 120 OR 240 VOLT AC
LINE OPERATION.

Electrical connections to the Series DSGT Indicating Transmitter are
made with the 3 foot flying lead cable. Refer to Figure A for wiring
Models DSGT-XXX-C0S, Figure B for Models DSGT-XXX-C1S, and
Figure C for Models DSGT-XXX-C2S.

Wire Length – The maximum length of wire connecting the transmitter
output and receiver is a function of wire size and receiver resistance to
the total loop resistance. Wiring should not contribute to more than 10%
of receiver resistance to the total loop resistance. For extremely long
runs (over 1000 feet), choose receivers with higher resistance’s to min­imize the size and cost of the connecting leads. When the wiring length
is less than 100 feet, the lead wires used can be as small as 22 AWG.

Figure A

Figure B

2-Wire Operation – An external power supply delivering 12-36 VDC

with a minimum current capability of 38 mA DC (per transmitter) must be
used to power the control loop. The range of the appropriate receiver
load resistance (RL) for the DC power supply voltage available is
expressed by the formula and graph in Figure D. Shielded two-wire
cable is recommended for the control loop wiring. If grounding is
required, use the negative side of the control loop between the receiv­er and power supply.

Figure C

Figure D