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Model 375 Series Submersible Level Transmitter
2.5
Wiring
4.61
117.2
2.5.1 Surge Protection
1 1/8 [28.6] HEX
(
1.3)
1.17 29.7
WARNING:
Do not connect any wires while AC Power input is applied.
Color
Polyurethane
Red
Black
Green
Surge protectors are available as an option item (see Parts & Accessories
in Section 3 of this manual). It is strongly recommended to protect from
secondary surges and lightning on outdoor installations. Install in accordance
with the applicable drawing that is supplied with the surge protector and
the following instructions:
1. Lightning protection devices should be placed as close to the meter or
transmitter as possible and wired in accordance with Local Electrical
Codes in an approved watertight enclosure.
2. If the distance between the meter and transmitter, or meter and recorder
is less than 100 ft., only one protector per line is needed.
3. Use No. 8 AWG ground wire or better from protector.
SPECIFICATION
4. Keep ground wire less than one foot long and tie to a suitable ground rod
PRESSURE RANGE
or metal frame ground. Surge capability is only as good as the grounding
ACCURACY AT 25 °C INCLUDING
method. All ground connections must be installed.
LINEARITY (BFSL),HYSTERESIS,
REPEATABILITY
5. Install protectors in weather-tight enclosures.
1 YR. STABILITY
LOAD LIMITATION
6. Run signal lines shielded and away from power lines.
OPERATING TEMPERATURE
COMPENSATED TEMPERATURE
7. Mount the fused switch panel as close to the meter as possible. Wire
ZERO OFFSET
according to the Local Electrical Code.
TEMPERATURE EFFECTS
WITHIN COMPENSATED RANGE
8. Lead lines for 110 Vac and 220 Vdc protectors should be cut as short as
BURST PRESSURE
VIBRATION
practical.
SHOCK
WETTED MATERIALS
PROCESS CONNECTION
ELECTRICAL CONNECTION
TEMPERATURE MEASUREMENT
1 2 3 4
Current
(4-20mA)
Output
+Vin
1 2 3 4
-Vin
Case Ground
Figure 2-3
Transmitter Wiring Identification
15 TO 150 PSIG
<0.25% FS
50K OHM MIN (ALL VOLTA GE OUTPUTS)
*
±1% FS
±1.25% FS
316L STAINLESS STEEL, CABLE & SEAL AS SELECTED BELOW, DELRIN
¼ -18 NPT MALE WITH DELRIN THREAD PROTECTOR
CABLE, TYPE PER MODEL CODE. OPTIONS N, R, C INCLUDE DESICCANT
OTHER CABLE OPTIONS USE AMETEK MODEL SJB100 (NOT INCLUDED).
6
(CABLE MUST BE VENTED TO DRY ENVIRONMENT)
LM335AZ (BLUE -CATHODE; BROWN-ANODE)
SELECT TEMPERATURE OPTION CODE "T"
(NOT AVAILABLE IN CONNECTION OPTIONS N,R, OR C)
ELECTRICAL CONNECTION
RED
BLACK
WHITE
GREEN
CABLE SHIELD
VDC OUTPUT
TYPICAL WIRING
RED
BLACK
WHITE
GREEN
N/C
CABLE SHIELD
4-20mA OUTPUT
TYPICAL WIRING
BLUE (CATHODE)
BROWN/ORANGE* (ANODE)
* ORANGE FOR TEFLON CABLE
TEMPERATURE OPTION
TYPICAL WIRING
0-6 PSI
±1% FS MAX
<0.5% FS
-25 TO 60°C (-13 TO 140°F)
0 TO 50°C (32 TO 122°F)
±2% FS
3X FS
10G, 55 – 2000 HZ
DC
POWER SUPPLY
CONTROLLER/
RECORDER/
VOLTAGE SENSE
DC
POWER SUPPLY
CONTROLLER/
RECORDER/
CURRENT SENSE
1mA
SOURCE
Vt=2.95V-3.01V
@25°C
dVt=±10mV/°C
INCREASES WITH
INCREASING TEMPERATURE
>150 PSI TO 3
<0.25%
600 OHM MAX (4-20
-25 TO 25°C (-1
0 TO 25°C (32
±1% FS
1.25%
30G
450 P
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