GT_8-IOM Rev. 0 7/19
Printed in USA
THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
ITT
Conoflow
105 Commerce Way
Westminster, SC 29693
Tel: (864) 647-9521
Fax: (864) 647-9568
INSTRUCTION AND MAINTENANCE MANUAL
GT_8 Series Milliamp I/P Transducer
CAUTION: These instructions should be read and
understood prior to installation, use or maintenance.
GENERAL PRODUCT OVERVIEW
This I/P transducer is a force-balanced unit which uses a fixed
filtered air inlet pressure, accepts a DC milliamp input signal
and converts it to a proportional air output pressure.
Models are available with an integral relay booster (GT28,
GT48, and GT68) or without the booster (GT18, GT38, and
GT58). All models are available in FM approvals
explosionproof (XP) housings.
SPECIFICATIONS
Input Range:
4-20 or 10-50 mA DC
Nominal Impedance:
4-20 mA model: 145 ohms
10-50 mA model: 60 ohms
Output Signal
:
3-15, 3-27 or 6-30 PSIG
(21-103, 21-186 or 41-207 kPa)
Required Air Supply: GT18, GT28:
25 PSIG (172 kPa)
GT38, GT48, GT58 or GT68:
35 PSIG (241 kPa)
Air Consumption:
GT18, GT28:
0.20 scfm (6 slpm) max
GT38, GT48, GT58 and GT68:
0.30 scfm (8.5 slpm) max
Air Delivery Rate: GT18: 0.1
5 scfm (4.3 slpm) max
3
GT28:
5 scfm (142 slpm) max
GT38: 0.1
5 scfm (4.3 slpm) max
3
GT48:
5 scfm (142 slpm) max
GT58: 0.1
5 scfm (4.3 slpm) max
3
GT68:
5 scfm (142 slpm) max
Exhaust Rate:
GT18:
0.17 scfm (5 slpm) max
3
GT28:
1.7 scfm (50 slpm) max
GT38:
0.2 scfm (6 slpm) max
3
GT48:
2.3 scfm (65 slpm) max
GT58:
0.2 scfm (6 slpm) max
3
GT68:
2.3 scfm (65 slpm) max
Linearity:
+/- 1.5% of output span
Temperature Effect:
0.2% of output span / 10 °F change
For a 2 °F / minute rate of change
2
Temperature Range:
0 °F to 150 °F (-18 °C to 66 °C)
Approximate Weight:
Approx. 7 lb (3.2 kg) – Std. Units
Approx. 13 lb (5.9 kg) – XP Units
Piping Requirements:
3/8” Tubing or 1/4” Pipe (minimum)
NOTES:
1. A Conoflow FR95 Airpak filter regulator or equivalent
is recommended for the filtered air supply.
2. Models without a booster relay have a temperature
effect rating of approximately 0.1% of output span / 10
°F for a 2 °F / minute rate of change.
3. Low volume models (GT18, GT38, GT58) do not have
a booster relay and should only be used in low
volume flowrate applications.
Prior to installation, inspect the package and
product for damage. Do not use if damaged. Verify
operation, and calibrate the transducer using the
procedure on page 4.
INSTALLATION
See figure 1 (page 2) for location of connection interfaces
ELECTRICAL CONNECTION: The electrical connection for
the input signal is made through a ½” NPSM or ½” NPT
conduit connection on the side of the transducer housing body.
Unscrew the cover and connect the positive lead to terminal 2
and negative to terminal 1.
For reverse acting models, connect the positive lead to
terminal 1 and the negative lead to terminal 2.
WARNING
Conoflow’s products are designed and
manufactured using materials and workmanship
required to meet all applicable standards. The use
of these products should be confined to services
specified and/or recommended in the Conoflow
catalogs, instructions, or by Conoflow application
engineers.
To avoid personal injury or equipment damage
resulting from misuse or misapplication of a
product, it is necessary to select the proper
materials of construction and pressure-
temperature ratings which are consistent with
performance requirements.
