Fluke 6270A, Service Manual, Page: 74 / 144

6270A
Service Manual
68
PMM PMM PMM PMM
V
e
nt
Reference
Te
s
t
Exhaust
Supply
PMM
PCM
6270A
High Range Module ≥ 1500 psi
Ball Valve
Regulator
Max 6000 psi Input
3300 psi Out
Vac
Pump
3300 6000
>3000 psi
N2 Bottle or Booster
Supply Bottle
CGA Fitting
+
hxn301.eps
Figure 40. Calibrating Sensors
Supply Port (ATM and 3,000 psi)
Note
There is an isolation valve between the supply port on the manifold
and the supply port of the PCM. Follow directions to ensure that the
supply pressure and valve position is correct for the calibration point.
Send the
CAL:PRES6:VAL1 xx.xx command to open the supply
isolation valve. This command will be used twice.
1. Remove all supply pressure from the supply port of the Product. See
Figure 41.
2. Use a TEE

to connect an external digital pressure device that reads in
Absolute units

to the supply line. Use this as the reference pressure.
3. Touch Vent and then Enter to vent the Product.
4. Ensure the supply line is disconnected from the supply port.
5. With the reference and supply sensor vented to atmosphere, type
CAL:PRES6:VAL1 xx.xx (xx.xx =value in units must be absolute). This