APG PG-5000 user manual - Manual (Page 4)

PG-5000 Rev. B4, 11/08
4
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]
• Instructions
All units are factory calibrated prior to shipment.
NOTE: Due to the temperature sensitivity of the strain gages within the
sensor, sudden temperature changes, such as holding an unmounted gauge by
the sensor, will cause the readings on the display to fluctuate. Please install
the gauge in your system before determining stability.
1. Zero Trimming
NOTE: Some units are equipped with zero “knob”.
If it becomes necessary to re-adjust the “Zero” on the display, this can be
accomplished by turning the trimpot marked “Z” just to the left of the On/Off
push button. On the PG-5000 there is either a zero adjustment knob or a black
nylon cover screw. If the gauge has a cover screw, it is necessary to remove the
cover screw to access the zero adjustment pot. An ideal zero is indicated by a
reading of 000 with an intermittently flashing “-” sign.
NOTE: A jewelers screwdriver or an eyeglass repair screwdriver (supplied)
is a suitable instrument. Do not make changes to the Span adjustment (the “S”
pot to the right of the push button) as part of the zero trimming. The Span
should only be changed as part of the re-calibration of a gauge with a known
pressure source.
2. Use of Auto-Tare Feature
When the PG-5000 is first turned on you will notice that the display flashes
for the first 4 seconds. If the On/Off button is pushed and held during this
period, any existing reading will be re-set to zero. This allows the user to “Tare-
Out” a starting weight in hydraulic weighing applications. To remove the Tare
feature turn the unit off and back on again and do not push the On/Off button
during the flashing period.
3. Battery Replacement (9 Volt Type)
The battery can be replaced simply by removing the single screw at the top of
the battery door. Remove the old battery, unplug the cable connector and
replace with Eveready type 216 or equivalent. Replace the battery door and
secure with the self-tapping screw. (Do not overtighten)
NOTE: For best accuracy, re-calibration per step 4 should be performed at
the time batteries are replaced.