30119-41 Rev. 1.6/02-07
3
MODEL TR28-2
DIGITAL INDICATOR-TOTALIZER-TRANSMITTER
INDEX
I. DESCRIPTION
II. SPECIFICATIONS
III. UNPACKING
IV. INSTALLATION
V. METERS
1.
Remove
2.
Clean Meter Head
3.
Transmitter Mounting Base
4.
Postition of Indicator-Totalizer-Transmitter
5.
Transmitter Wiring
VI. OPERATION AND MAINTENANCE MANUAL
VII. PRINCIPALS OF OPERATION
1.
TR28-2 Functions
2.
Battery
3.
Power to TR28-2
VIII. SENSOR and TR28-2 DIGITAL
INDICATOR-TOTALIZER-TRANSMITTER
1.
TR28-2 Digital Transmitter
2.
TR28-2
3.
Sensor Assembly
4.
Battery Replacement
IX. TROUBLESHOOTING
1
. Troubleshooting Guide
2.
Working Area
3.
TR28-2 Digital Transmitter
4.
Moisture
5.
Transmitter Communication Lines
6.
TR28-2 Circuit
X. INSPECTION
XI. REASSEMBLY
XII. INOPERATIVE INSTRUMENT EVALUATION
1
. Check All Instruments and Transmitters
2.
Check Your Instrument
3.
Transmitter or Communication Line
4.
Full Scale Output
5.
Transmitter Communication Lines
6.
Communications Problems
7.
Separation of Signal and Power
I.
DESCRIPTION:
The Model TR28-2 Digital Indicator Totalizer
Transmitter
provides flow rate indication, totalization
of flow volume and a current output signal proportional
to the rate of flow when mounted on our meters. The
TR28-2 is for installation on propeller meters.
II. SPECIFICATIONS:
ACCURACY Rate
±0.25% of reading.
TEMPERATURE
Operation: 32° to 160° F.
RANGE
Storage:
-40° to 160° F.
Consult factory for special construction for other
temperatures.
INPUT SIGNAL
Type:
Voltage pulse.
Voltage Range:
1 to 10V.
Minimum Frequency:
0.125Hz.
Maximum Frequency:
3KHz.
Minimum Pulse Width:
2
μ
s.
OUTPUT SIGNALS
Combination 4-20mA Output and
Isolated Scaled Pulse Output:
Standard 2 wire loop powered.
16 bits resolution.
Operating voltage:
12 to 32 VDC.
Power Switch: Auto battery override.
Scaled Pulse Output:
Open collector MOS transistor.
Pulse width:
32 milliseconds.
Maximum Rating:
1 to 32 V.
EMI/EMC
Electrostatic Discharge:
8KV
(IEC 1000-4-2 Level 3).
Electrical Fast Transient:
1KV
(IEC 1000-4-4 Level 3).
RF Susceptibility:
150 KHz to 230 MHz @ 10V
(IEC 1000-4-4 Level 3).
POWER SUPPLY
24 VDC (as supplied by our power supply Model
IN36-1, available separately) wired in series.
The Indicator-totalizer-transmitter is primarily
loop powered, but becomes self-powered via a
lithium battery in the event of a power loss.
Battery Type - 3 VDC Lithium,
Replaceable
Operating Life - 2 years (when used
with the display timeout into sleep mode
feature).
Low Battery Indication - 6 months before
expiration.
OPTIONAL
Mounting brackets, with up to 100 feet
EQUIPMENT
of cable for remote installation.
SHIPPING WEIGHT
4 pounds.
ORDERING INFO
Must be specified by the customer and includes
serial number of meter on which unit is to be
mounted, maximum scale range required for 4-20
output, indicator scale and units, totalizer dial
units. Consult factory for special applications.
