Calibrate The Sensors - Fluke 6270A Service Manual

2/05/15
Setup Menu
Control Coefficients
PA1
Apply Low
PA2
Apply High
PR1
Release Low
PR2
Release High
Test C0
Test C1
Supply C0
Supply C1
Exhaust C0
Exhaust C1

Calibrate the Sensors

Test port (ATM and 3,000 psi). See Figure 40.
Fluke Calibration does not recommend to do this adjustment at a
maximum pressure <1500 psi to ensure best sensor alignment. If
you do not have a 3000 psi module, use the highest-rated module
that you have.
1. Install the highest-range PMM that you have and make it the fixed range.
2. Set the PMM measurement mode to Absolute.
3. Apply a supply pressure of 110 % to 115 % FS of your highest-range
PMM.
4. Install a shutoff ball valve on the test port and leave it open.
5. Vent the system.
6. Use a reference barometer to read the absolute ATM pressure in the
units and type CAL:PRES4:VAL1 xx.xx (xx.xx = value in units must be
absolute) on the terminal.
7. Close the shutoff valve on the test port.
8. Set a pressure to control at FS of your PMM.
9. Read the absolute PMM pressure and type CAL:PRES4:VAL2 xx.xx
(xx.xx =value in units must be absolute) on the terminal.
10. Type CAL:PRES4:SAVE on the terminal.
10:52am
Diagnostic
1769
12370
4800
14310
64
10730
3088
11510
12512.0
0.004567
10242.9
0.004366
9434.34
0.000541
MEASURE CONTROL
Figure 39. Current Sensor Information
Note
Pressure Controller/Calibrator
Input 2: 7.54-- mV
0.0020 psi
Control Primary
Port Pressure
Test Port 14.60 psi
Supply Port 14.13 psi
Exhaust Port 15.15 psi
Control Module
Model Number PCM-STD-20M
Serial Number
Revision
Autotune
VENT SETUP
PCM Assembly
3059003
0.55
Exit
hxn407.eps
67