DH Instruments PPCK PLUS, Operation And Maintenance Manual

Page: 137 / 150

PPCK+™ Operation and Maintenance Manual
Page 129
©2001 DH Instruments, Inc .
6. T
ROUBLESHOOTING
PPCK+ is a sophisticated pressure setting and measuring instrument with advanced on-board
features and functions. Before assuming that unexpected behavior is caused by a system defect
or breakdown, the operator should use this manual and other training facilities to become
thoroughly familiar with PPCK+ operation. This troubleshooting guide is intended as an aid in
identifying the reason for PPCK+ behavior and determining whether the behavior is due to normal
operation or an internal or external problem.
Table 18. Troubleshooting Guide
SYMPTOM POSSIBLE CAUSE SOLUTION
Will not power up. Blown fuse. Replace fuse.
Measured pressure display has
too much/not enough resolution. Resolution setting needs to be
changed.
Use [RES] to change resolution
setting (3.2.9).
The pressure units available
under the
[UNIT] function key
are not the ones you want.
UNIT function needs to be
customized.
Use [SPECIAL] , <3PresU> to
customize the UNIT function
(3.2.2) or reset units to default
(3.4.4.5, Reset – Units).
Front panel keys seem to be
disabled. <Remote> command has been
sent from a host computer.
Send <local> command from
host computer or cycle PPCK+
power (4.4).
Front panel display is dim. Screen saver option has
activated. Press any key to resume full
screen power. Adjust screen
saver delay time, if desired
(2.4.4.8).
Cannot access certain functions.
>ACCESS RESTRICTED<
User levels have been set that
restrict access to certain
functions. Change user level or consult
system manager (3.4.4.6).