DH Instruments PPCH-G, Руководство по эксплуатации и обслуживанию

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3. OPERATION
Page 59 © 2007 DH Instruments, a Fluke Company
 PRINCIPLE
The resolution with which PPCH-G displays pressure values can be adjusted.
This feature can be used to reduce the resolution when lower precision measurements are
being made and excess resolution might confuse or distract the operator.
The resolution setting determines the number of digits with which pressure is displayed.
The resolution is calculated based on the full scale of the range and then rounded to the
furthest digit to the right. For example, resolution of 0.001 % on a range of 150 MPa is
150 X 0.001 % = 0.0015 which is rounded down to 0.001 MPa.
Default resolution is 10 ppm of active range span. Resolution is set automatically by
AutoRange (see Section 3.3.4).
 OPERATION
To access the resolution function, press
[SETUP]
,
<2res>
. The display is:
Display resltn: IH
0.0010 %FS < and >
Use the cursor control keys to set the desired level of resolution. Press
[ENT]
to return to the
MAIN RUN screen with the new resolution setting active or
[ESC]
to make no changes.
The resolution setting is range specific. A resolution setting made in one range does NOT
affect other ranges.
The maximum resolution setting is limited in AutoRange ranges that are less than 10 % of
the Q-RPT default full scale.
The maximum resolution setting when using a utility sensor is 0.001 % of utility sensor span.
3.4.3 <3JOG>
 PURPOSE
Adjust the nominal change in pressure caused by using the jog direct pressure control keys
([ ] and [ ]).

PRINCIPLE
The jog direct pressure control keys, [ ] and [ ], increase or decrease pressure by a
nominal amount each time they are pressed. If pressure control is NOT active, pressing the
jog key causes an up or down pressure step. If dynamic pressure control is active, the jog
key causes the pressure control target value to be changed by the amount of the jog step.
[SETUP]
, <3jog> allows the nominal value of the jog step to be adjusted.
The default jog step is 0.02% of active range span. The maximum jog step is 5 % of active
range span. Jog step value is set automatically by AutoRange (see Section 3.3.4).
See Section 3.1.3 for information on the jog key effect while control is active in various
control modes.