Fisher 3660 Instruction Manual page 3

Instruction Manual
D101402X012
Table 1. Specifications
Available Configuration
3660: Single‐acting pneumatic valve positioner
3661: Single‐acting electro‐pneumatic valve
positioner
Input Signal
3660
J 0.2 to 1.0 bar ( 3 to 15 psig),
J 0.4 to 2.0 bar ( 6 to 30 psig), or
J split range (see tables 7 and 8)
3661:
J 4 to 20 mA DC constant current with 30 VDC
maximum compliance voltage.
J split range is also available, see tables 7 and 8
Equivalent Circuit (3661)
120 ohms shunted by three 5.6 V zener diodes
Output Signal
Type: Pneumatic pressure as required by the actuator
up to full supply pressure
Action:
J Direct (increasing input signal pressure increases
positioner output),
J Reverse (increasing input signal pressure
decreases positioner output)
(1)
Supply Pressure
Recommended: 10% above actuator requirements
Maximum: 6.2 bar (90 psig) or pressure rating of
actuator, whichever is lower
Medium: Air
3660 and 3661 are not compatible with natural gas
as the supply medium
Performance
Independent Linearity: ±1% of output span
Hysteresis: 0.5% of output span
Deadband: 0.1% of input span
Electromagnetic Compatibility for 3661
electro‐pneumatic positioner:
Meets EN 61326‐1:2013
Immunity—Industrial locations per Table 2 of
the EN 61326‐1 standard. Performance is
shown in table 2 below.
Emissions—Class A
ISM equipment rating: Group 1, Class A
(2)
- continued -
Positioner Adjustments
Span: J Adjustable up to 20 mm (0.75 inch) stem
travel, or J Adjustable from 20 mm (0.75 inch) to 50
mm (2 inch) stem travel
Zero: 0 to 100%
Gain: 0.5 to 6% PB (proportional band)
Output Volume Damping: Loop dynamic response
adjustment
(4)
Delivery Capacity
1.4 Bar (20 Psig) Supply: 4.3 normal m
(150 scfh)
2.4 Bar (35 Psig) Supply: 6.6 normal m
(230 scfh)
(4)
Exhaust Capacity
1.4 Bar (20 Psig) Supply: 4.8 normal m
(170 scfh)
2.4 Bar (35 Psig) Supply: 7.4 normal m
(260 scfh)
Steady‐State Air Consumption
3
3660: 0.17 normal m /hour (6.0 scfh) at 1.4 bar
(20 psig) supply pressure. 0.22 normal m
(7.9 scfh) at 2.4 bar (35 psig) supply pressure
3
3661: 0.24 normal m /hour (8.8 scfh) at 1.4 bar
(20 psig) supply pressure. 0.33 normal m
(12.3 scfh) at 2.4 bar (35 psig) supply pressure
Operating Influence
Supply Pressure: 70 mbar (1 psig) change in supply
pressure changes the actuator stem position less than
(6)
0.16% of travel
Operative Temperature Limits
3660 without Pressure Gauges: -40 to 121°C
(-40 to 250°F)
3660 with Pressure Gauges: -40 to 82°C
(-40 to 180°F)
3661 with or without Pressure Gauges: -40 to 82°C
(-40 to 180°F)
Hazardous Area Classification for 3660
3660 pneumatic positioners comply with the
requirements of ATEX Group II Category 2 Gas and
Dust
3660 and 3661 Positioners
September 2015
(3)
3
/hour
3
/hour
3
/hour
3
/hour
(4,5)
3
/hour
3
/hour
(1)
3