Fluke A20M-AF ユーザーズマニュアル

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

Page 40

Before running AutoZ in gauge mode, ensure that the pressure applied to the

Q-RPT is truly zero gauge (atmospheric pressure). If running AutoZ in gauge mode
results in a zero offset that RPM4 considers unusually large, <Confirm 0 gauge P!> is

displayed. Check that zero gauge pressure is applied to the Q-RPT module rear panel

TEST(+) port and the ATM port is open to atmosphere and unobstructed.

Allow the RPM4 to stabilize at atmospheric pressure and ambient temperature

for 2 to 3 minutes before running AutoZ in gauge mode.

3.3.9.2

[AUTOZ] IN ABSOLUTE MODE

PURPOSE

To “rezero” the active Q-RPT in absolute measurement mode

See Section 3.5.1, Principle for a full explanation of the AutoZ function.

OPERATION

For the AutoZ function key to run AutoZ, AutoZ must be turned ON for the

active Q-RPT and measurement mode. AutoZ ON is indicated by <z> to the left of

the range designator on the first line of the main run screen. AutoZ ON and OFF is

set using [SPECIAL], <1AutoZ> (see Section 3.5.1). If AutoZ is OFF for the active

range, and measurement mode, <AutoZ OFF> is displayed when [AutoZ] is pressed.

To run AutoZ in absolute measurement mode, use [MODE] to set absolute
measurement mode (see Section 3.3.3) and press [AutoZ] from the main run
screen. The display is:

Active Q-RPT designator.

Current measurement mode (absolute).

Selection of source of P

std,0

reference to which

to AutoZ.

AutoZ Hi abs by:

13ntry 2COM2 3Lo RPT

Selecting <1entry> allows the value of P

std,0

to be entered from the front panel keypad.

Selecting <2COM2> allows the value of P

std,0

to be read automatically from another

DHI RPMx connected to RPM4’s COM2 communications port.

Selecting <3Lo RPT > is shown only if the Hi Q-RPT is active. This selection
allows the value of P

std,0

for the Hi Q-RPT to be read automatically from the

RPM4s Lo Q-RPT.

Allow the RPM4 to stabilize at atmospheric pressure and ambient temperature

for 5 to 10 minutes before running AutoZ in absolute mode.