DH Instruments PPCK PLUS, Руководство по эксплуатации и обслуживанию

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PPCK+™ Operation and Maintenance Manual
Page 15
©2001 DH Instruments, Inc .
Observe that, within 60 seconds, the [VENT] LED flashes and zero is indicated. It is
normal for PPCK+ to indicate a value other than zero for up to 60 seconds when first
entering
gauge mode.
Using the [RANGE] function key to change ranges, observe that zero is indicated for
each range within 60 seconds. When gauge mode is first entered or ranges are
changed, it is normal for PPCK+ to indicate a value other than zero when vented.
After up to 60 seconds, the VENT LED should flash and zero should be indicated.
If this does not occur, check that the AUTOZERO function is ON (see Section 3.4.1)
and that the TEST port is truly exposed to atmospheric pressure. If the display will
not zero, PPCK+ may need repair.
2.4.3 LEAK CHECK
If desired, perform a leak check of the test system (see Section 3.2.8).
2.4.4 CHECK PROPER PRESSURE CONTROL OPERATION
Select a pressure range using the [RANGE] key (see Section 3.2.1).
Press the [CONTROL] function key and select <dynamic> (see Section 3.2.3).
Press [ENTER]. Specify a target pressure within the active range and press [ENTER] again
(see Section 3.2.3).
PPCK+ should set the target pressure and indicate Ready (see Section 3.1.2.5) continuously
within 45 to 150 seconds. If it does not, see Section 6 to troubleshoot pressure control.
Remember that the correct pressure supplies must be connected to the SUPPLY pressure
DRIVE IN pressure ports for pressure control to operate properly (see Sections
2.3.6, 3.1.2.3).
Before setting a pressure with PPCK+, assure that the test system connected to the PPCK+
TEST port is rated for the pressure that will be generated.
2.5 SHORT TERM STORAGE
The following is recommended for short term storage of PPCK+:
n
Vent the PPCK+.
o
Turn power OFF using the rear panel power switch.
p
Shut OFF or disconnect the pressure supply.
q
Shut OFF or disconnect the drive air supply.