GF Signet 2250 User Manual
Signet 2250 Hydrostatic Level Sensor
English
*3-2250.090*
3-2250.090 Rev. E 06/13 English
Safety Instructions
1. Prior to installation or removal:
• Depressurize and vent system
• Drain below sensor level
2. Confi rm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure specifi cations.
4. Wear safety goggles or faceshield during installation/service.
5. Do not alter product construction.
6. Dispose of properly; DO NOT INCINERATE!
1. Description
The Signet 2250 Hydrostatic Level Sensor uses a gauge pressure sensor to calculate the level of fl uid in a tank.
Gauge pressure sensors measure the difference in pressure between the process on one side of a diaphragm and the atmospheric
pressure on the opposite side of the diaphragm. A tiny capillary tube running from inside the sensor body and
up the length of the cable provides the reference to atmospheric pressure.
Hydrostatic level measurement can be a simple and practical solution to those applications where the fl uid
temperature is stable and constant.
IMPORTANT! This method of level measurement is not recommended if the fl uid is subject to
temperature variations or any other variable that causes the density of the fl uid to change.
The 2250 Hydrostatic Level Sensor has excellent chemical compatibility.
The wetted materials are PVDF, Ceramic and FPM.
Several different hardware mounting kits are available to accommodate every installation requirement.
2. Specifi cations
General
Compatibility: Signet 8900 Multi-Parameter Controller
Signet 9900 Transmitter
Wetted Material
• Sensor housing: PVDF
• Union nut/bushing: PVC-U
• Diaphragm: Ceramic
• Diaphragm seal: FPM (optional EPDM)
Cable type: 22 AWG, 3 conductor+capillary tube
Cable length: 10 m (32.8 ft) supplied
max. extension 120 m (400 ft)
Operating Temperature: 15 °C to 85 °C (5 °F to 185 °F)
Storage Temperature: -20 °C to 100 °C (-4 °F to 212 °F)
Operating Pressure: -XU: 0 to 0.7 bar (0 to 10 psig)
-XL: 0 to 3.4 bar (0 to 50 psig)
Electrical
Digital (S
• Format: Serial ASCII, TTL level 9600 bps.
• Accuracy: ±1% of full scale (±0.001 psi)
• Power: 5 VDC nominal, 1.5 mA max. current
(5 VDC min, 6.5 VDC max)
• Reverse polarity and short circuit protected
4 to 20 mA Output:
• Factory span:
• Accuracy: ± 32 μA
• Resolution: < 5 μA
• Response Time: < 100 ms
3
L) Output:
• -XU: 0 to 0.7 bar (0 to 10 psig) =
0 m to 7 m (0 ft to 23 ft) of water
• -XL: 0 to 3.4 bar (0 to 50 psig) =
0 m to 34 m (0 ft to 115.5 ft) of water
• Loop Power Required: 12 to 24 VDC nominal, 22.1 mA max
(10.8 VDC min. to 26.4 VDC max.)
• Max. Loop Impedance:
100 Ω @ 12 V
325 Ω @ 18 V
600 Ω @ 24 V
Standards and Approvals:
• CE
• RoHS Compliant
• Manufactured under ISO 9001 for Quality,
ISO 14001 for Environmental Management and
OHSAS 18001 for Occupational Health and Safety.
China RoHS (Go to www.gfsignet.com for details)
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and,
(2) This device must accept any interference received,
including interference that may cause undesired operation.
Dimensions
½ in. (ANSI) or
25 mm (ISO)
Solvent Socket,
PVC-U
53 mm
(2.09 in)
115 mm
(4.55 in)
34 mm
(1.32 in)
Installation
IMPORTANT!
A tiny capillary tube inside the sensor body is used to ensure that the back of the diaphragm remains at atmospheric pressure.
If the capillary tube is blocked or damaged, the sensor cannot operate properly.
• If moisture is allowed to propagate down this tube to the rear of the diaphragm, the sensor may be damaged.
• Do not allow the cable to be bent or compressed.
• The ceramic diaphragm in the 2250 can be permanently damaged by over-pressure conditions or by mechanical contact.
HANDLE THESE SENSORS WITH CARE.
Direct 4 to 20 mA output
The 2250 can be assembled as a blind 4 to 20 mA signal connected
by cable to a PLC, chart recorder or other 4 to 20 mA device.
This type of installation requires no additional hardware.
The user must provide the ¾ in. conduit to protect the cable from
PLC
damage. The 2250 cable is not suitable for direct submersion.
4 to 20 mA
The 2250 can be assembled as a digital sensor connected
directly to a Signet 8900 Multi-Parameter Controller or Signet
9900 Transmitter.
3-2250-2xx-x
Direct Digital output
Digital (S
C1 2.50 μS/cm
L2 58.43 M
Multi-Parameter
Controller
Relay 1
Relay 2
ENTER
3-8900
3
L)
ENTER
3-9900
3-2250-1xx-x
2 2250 Hydrostatic Level Sensor
2250 with 4 to 20 mA or Digital (S3L) Output: Remote Mounting
The 2250 can provide a digital (S3L) signal to a 9900 Transmitter or 8900 Multi-Parameter Controller.
The 2250 can provide a 4 to 20 mA signal to a PLC or to a chart recorder.
4-20 mA or Digital (S3L) signal out
Clamped to Tank support
3-8052-1
4-20 mA Out
OR
Digital (S3L)
¾ in. conduit
(customer supplied)
3-2250-xx
PLC
C1 2.50 μS/cm
L2 58.43 M
Relay 1
3-8900
3-9900
Multi-Parameter
Controller
4-20 mA or Digital (S
Mounted through Tank Cover
3-8050-1
Relay 2
ENTER
ENTER
¾ in. conduit
(customer supplied)
3-2250-xx
3
L) signal out
4-20 mA Out
OR
3
Digital (S
PLC
C1 2.50 μS/cm
L2 58.43 M
L)
Multi-Parameter
Controller
Relay 1
Relay 2
ENTER
3-8900
ENTER
3-9900
2250 with Digital Output: Integral mounting
The 2250 can be assembled as an integral system, with the 3-9900-1 Transmitter mounted directly atop the sensor. This confi guration
provides a local display at the measurement site, plus the 4 to 20 mA and open-collector output features of the 9900 Transmitter.
Integral Transmitter
Clamped to Tank support
3-9900-1
3-8052
¾ in. conduit
(customer supplied)
3-2250-X
ENTER
4-20 mA Out
AND
Control Relay Out
Integral Transmitter
Mounted through Tank Cover
3-9900-1
PLC
3-8050
NC
C
NO
¾ in. conduit
(customer supplied)
3-2250-XX
ENTER
4-20 mA Out
Control Relay Out
PLC
AND
NC
C
NO
32250 Hydrostatic Level Sensor
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