Signet 2507 Mini Flow Sensor
3
5. Calibration
The K-Factors listed here represent the number of pulses the sensor will generate for each measured engineering unit. They are
listed in Liters and in U.S. gallons for each sensor model.
Sensor
Model
Code
Flow
Insert
K-FACTORS
Pulses per
LITER
Pulses per
U.S. Gallon
3-2507.100-1V
198 801 731
1 mm
3413
12918
3-2507.100-2V
198 801 732
2 mm
1687
6385
3-2507.100-3V
198 801 733
3 mm
1045
3955
3-2507.100-4V
198 801 734
4 mm
721
2729
3-2507.100-6V
198 801 736
NONE
382
1446
FLOW
Red
Black
Shield
Signet
5500/5600
2507
Freq. IN
Sen. Pwr
.
Freq. IN
Iso. Gnd
Open Collector
Sensor
Std. Sensor
Red
Black
Shield
Signet 8550-1
FLOW
2507
Sensr Gnd
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
9
8
7
Signet 8900
FLOW
FLOW
2507
Input
Gnd.
10k Ω
+
5 to 24
VDC
-
Black
Shield
Red
• Pull-up resistor required (10 kΩ recommended). Consult your instrument manual for
additional
information.
Other
instrument
Other Brands
External Power supply
3-8900.621C
I/O Module 3-8900.401-X
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+5VDC (Black)
Freq. Input (Red)
GND (Shield)
+5VDC (Black)
Freq. Input 2 (Red)
S L (Red)
GND (White/Shield)
+5VDC (Black)
S L (Red)
GND (White/Shield)
3
3
Analog Output 1
Analog Output 2
(if applicable)
(if applicable)
Frequency
Input
1
Frequency
Input 2
OR
S3L
Input
2
S3L
Input
1
+
-
+
-
2507
2507
FLOW
Instrument Connections
Assemble
(counterclockwise)
Disassemble
(clockwise)
Upper body
Lower Body
Assembly
Tabs (3)
FLOW
Inlet port
Outlet port
flow
insert
Rotor
Quad ring seal
WARNING!
Do not use tools of any kind on the sensor body or port
connections. Hand tighten only! Excessive force will
damage sensor.
6. Replacing The Flow Insert
Sensor range can be modifi ed by changing the fl ow insert. The
sensor must be removed from service and disassembled prior to
installing the new fl ow insert. See Specifi cations (Section 2) for
fl ow range data.
Flow Insert Replacement Procedure:
1. Depressurize system and remove sensor.
2. Rotate the upper sensor body clockwise until it releases from
the lower half, then lift off.
3. Remove rotor and quad ring seal from lower body.
4. Push
the
fl ow insert outward using a small screwdriver.
5. Install the new fl ow insert (small diameter inward) with the
eraser end of a pencil. Apply light pressure until insert seats
against the step in the lower body.
Do not force!
6. Install rotor into lower body. Spin rotor with fi nger and check
for free rotation. If rotor hits fl ow insert, remove rotor and
push insert back until free rotor rotation is established. Use a
rounded object like a pen or pencil body to adjust fl ow insert
depth.
7. Install rotor, quad ring, and upper body.
Hand tighten only!
Do not overtighten upper body or the lower body assembly
tabs will break.
8. Reprogram instrument with new K-Factor, see Calibration
(Section 5).
IMPORTANT!
•
K-Factors must be considered as approximate
values.
•
The number of pulses per volumetric unit
may vary depending on the medium and the
installation.
•
For optimum performance, the system must
be calibrated after installation.
