- 10-
Revision 4.6 3/2004
where:
xx = the range of the installed module engineering unit
is the default engineering unit for the module installed in
the left bay
Note: GQS-2 pressure measurement modules are avail-
able with a standard calibration or an optional enhanced
temperature performance calibration. Modules calibrated
to provide enhanced temperature performance will pro-
vide the rated accuracy, without any additional tempera-
ture error over an operating temperature range of 20-120
degrees Fahrenheit. These modules will display:
enh
temperature performance
when powered up.
The range indication is provided in the primary engi-
neering unit for each installed Quick Select module.
Upon initial power up an HHC used with an GQS-RT1
temperature module and probe will default to display-
ing the ohms (resistance value) for the probe. Once set
up this combination will default to the previously used
temperature measurement unit, such as Celsius, Fahren-
heit, Kelvin or Rankine. The primary engineering unit
for a given Quick Select pressure module, along with
the measurement range, is included on the module label.
The information on the left side of the display corre-
sponds with the Quick Select module installed in the left
module bay and information on right side of the display
corresponds with the Quick Select module installed in
the right module bay. If only one module is installed
the corresponding side of the display will indicate “no
module” on power up.
After the third screen the HHC will commence provid-
ing pressure measurement data. The format for display
of the measurement data is as follows:
Eng Unit Eng Unit
(primary engineering unit)
+xx.xxx +xx.xxx
(measured value with sign)
When only one module is installed, the side of the dis-
play corresponding to the side of the base unit that does
not have a module will display “- - - - -”
If necessary, the HHC, used with a Quick Select pres-
sure module, may be zeroed by pressing the Zero key
prior to beginning measurement activities. Additional
details on zeroing the HHC system are provided in Sec-
tion 6.0 of this manual.
The HHC is now ready for basic pressure or temperature
measurement. Simply connect the pressure port(s) of the
Quick Select pressure module(s) to be used to the pres-
sure source to be measured. If a gauge pressure mea-
surement is to be made using a differential Quick Select
pressure module be sure to connect the pressure to be
measured to the high pressure port on the Quick Select
pressure module. For temperature measurement, connect
the RTD probe to be used to the Switchcraft connec-
tor on the interface module and proceed to Section 16
and 17 for instructions on setting up the calibrator for
temperature measurement.
Section 3.4
Optional System Start Up
Procedures
There are additional set up operations that can be per-
formed to increase the overall capabilities of the HHC
system; these include:
1 – Auto off function to protect from inadvertently leav-
ing the HHC system on.
2 – Setting up battery level indication so that an estimate
of the remaining battery life can be viewed at the push
of a button.
3 – Programming the current date and time for use in
date stamping data logged pressure values and starting
delayed data logging activities on HHC systems with the
optional data logging capability.
Current date and time
information is only maintained in units with the data
logging option
4- Programming owner/operator information for display
on the HHC to facilitate tracking of in-house instrumen-
tation.
The following subsections provide information on the
above listed start up procedures.
Section 3.4.1 Auto Off- Battery Save Function
(BatFunc)
The HHC can be set up to automatically turn itself off
if no keypad activity is detected for a 10 minute time
period. This capability will protect the two 9 volt batter-
ies from being depleted if the HHC is left on inadver-
tently.
The following procedure is used to activate or disable
the battery save function.
Step 1
With the HHC on and reading pressure press the
SET UP key.
SET
UP
Step 2
Using the arrow keys select the battery func-
tion submenu (designated BatFunc in the set up menu).
When selected, the text “BatFunc” will fl ash on the
display.
Содержание PTE-1
Страница 79: ...79 Revision 4 6 3 2004...
