mensor PCS 400, Operation Manual

Page: 71 / 118

Pressure Control Rates
A pressure rate limit may be selected to limit the
maximum slew speed between selected control
points. Minimum and maximum slew speed is
dependent upon pressure range per the follow-
ing table:
Table 7.1 – Min/Max Slew Speed
Full Scale (FS
)
Minimum Maximum
>
100 psi .025 psi/sec 10 psi/sec
£
100 psi .0025 psi/sec 1 psi/sec
£
5 psi .00025 psi/sec .1 psi/sec
Control Time
When controlling: For the output pressure to be
in the stable window, 55 seconds is typical be-
tween any two pressure points from 0.5% FS
above the exhaust pressure to full scale with a
1/2 liter volume. A larger volume can lengthen
this time. The time will also be longer for abso-
lute pressures below 0.5 psia.
Overshoot
NORMAL Mode: 1% FS maximum.
RATE Mode: Typically less than 0.004% FS. This
figure may be larger in low absolute pressure
applications, and is somewhat dependent on the
range, vacuum pump efficiency and overall sys-
tem volume.
Supply Consumption
Less than 2.5 scfh at static pressure. Additional
consumption caused by pressure slewing cannot
be specified due to unknown volumes, frequency
of pressure changes, and extent of pressure
changes.
GENERAL SPECIFICATIONS
Size
(See Figure 7.1 - Dimensional Outline)
Width:
17.05 inches (43.31 cm)
19.00 inches (48.26 cm) with rack
adapter
Height: 6.97 inches (17.70 cm)
Length: 20.00 inches (51 cm) without fittings
Weight
43.00 lbs (19.5 kg) single range less rack
adapter
4.00 lbs (1.8 kg) rack adapter kit
Mounting
Standard: Table model.
Optional: Rack Mount Kit with slides is avail-
able for mounting in 19 inch rack.
Power Input Requirements
90 to 264 VAC, 50 to 60 Hz autoswitching,
175VA max.
Power Cord: Detachable, 3-wire 117V.
Fuses
Two each, 1.5A, 117V. Accessible without open-
ing unit.
Pneumatic Interfaces
7/16 - 20 SAE/MS (female).
1/8" female NPT adapters provided.
Particle Filters
Internal replaceable 30 micron filters are in the
SOURCE and MEASURE/CONTROL ports, and
a 40 micron filter in the VENT port.
Overpressure Protection
Measure/Control Port: This port has a relief
valve set at 5% to 10% above the pressure range
of each internal sensor as referenced to atmos-
phere.
Compensated Temperature Range
15°C to 45°C.
Operating Temperature Range
0°C to 50°C. Note: This is not the compensated
temperature range.
Storage Temperature Range
–20°C to 70°C.
Local User Interfaces
Keypad: 16 dual-function keys.
Display: Vacuum fluorescent, 2 lines of 40 char-
acters.
Remote User Interfaces
IEEE-488-STD-1978 and RS-232.
Warm-up
Approx. 45 minutes to achieve full accuracy.
Reading Rate
Typically 30 readings/sec.
SPECIFICATIONS
PCS 400
7-2 www.mensor.com