Control Specifications; Pressure Measurement Specifications - Fluke 6270A Service Manual

6270A
Service Manual
Interface / Communications
Primary remote Interfaces .................. IEEE, Ethernet, RS232, USB
System Connection ............................. Supports interconnection of 2 or 3 systems
Switch Test Connection ...................... Standard 4 mm Jack:
Aux Drivers ......................................... 4 external Solenoid Drivers

Control Specifications

Control Precision (Dynamic Mode)
PM200-BG2.5K................................... 0.005 % Range Span
All other Ranges ................................. 0.001 % Range Span
Control Turndown ............................... 10:1 (Typical)
Control turndown is defined as the relationship between the provided supply pressure and the appropriate supply
pressure for the range. For example, a unit with a 7 MPa (1000 psi) and 700 kPa range (100 psi) with a supply pressure
of 7.7 MPa (1100 psi) will provide control precision of 0.001 % range because 7 MPa is 10 times greater than 700 kPa. A
system with ranges of 20 MPa (3000 psi) and 700 kPa (100 psi) with supply pressure of 22 MPa (3300 psi) will have
0.001 % range control precision on the 20 MPa range but only 0.003 % control precision on the 700 kPa range. Control
precision of 0.001 % on the low range can be achieved by reducing the supply pressure.
Low Control Point ............................... 1 kPa (0.15 psi) absolute
Time to Setpoint (Typical)
PM200-BG2.5K................................... 40 seconds
PM200, all other ranges ..................... 20 seconds
PM600 ................................................ 35-55 seconds
Typical set time is the time required to be within 0.005 % of setpoint for 10 % steps into volumes of 0 to 50 cm
pressures above 50 kPa (7.25 psi) absolute. Lower absolute pressures will require longer set times depending upon
quality of the vacuum pump, diameter and material of tubing used, and test volume.
Maximum Overshoot ........................... 0.01 % Range Span

Pressure Measurement Specifications

The product specifications describe the Absolute Instrumental Uncertainty of the Product. The product specifications
include linearity, hysteresis, repeatability, resolution, reference standard measurement uncertainty, 1 year stability, and
temperature effects from 18 to 28 °C. The product specifications are provided at a 95 %, k=2, normally distributed, level of
confidence.
6
Nominal 24 V dc isolated drive
Maximum 30 V dc w.r.t. chassis ground
24 V dc Drive (Maximum drive 6 W continuous per channel)
3
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