Jennings Credit Card 150 User Manual

Jennings Credit Card 150
User Manual
Thank you for purchasing The Jennings Credit Card Scale. With normal care and proper treatment it will provide years of reliable
service. Please read all operating instructions carefully. You can contact us at
* If the display becomes locked on Out2 please recalibrate the scale.
* Avoid lengthy exposure to extreme heat or cold, your scale works best when operated at normal room temperature.
allow the unit to acclimate to a normal room temperature for at least one hour before use.
* Allow sufficient warm up time. Turn the scale On and wait several seconds to give the internal components a chance to stabilize
before weighing.
* The cleaner the environment the better. Dust, dirt, moisture, vibration, air currents and proximity to other electronic equipment can
all cause an adverse effect on the reliability and accuracy of your scale.
* Handle with care. Gently apply all items to be weighed onto tray top. Although this scale is designed to be quite durable, try to avoid
rough treatment as this may permanently damage the internal sensor and void your warranty.
* Avoid shaking, dropping or otherwise shocking the scale. This is a precision instrument and MUST BE HANDLED WITH
* Only operate the scale on a stable, vibration free surface. IMPORTANT: Do not operate near cell phones, radios, computers, or
any other electronic device.
.** These electronic scale are precision instruments. Do not operate near an in-use cell phone, cordless phone, radio, computer or
other electronic device. These devices emit RF and can cause unstable scale readings. If your scale ever performs poorly, try
moving the scale to a different room or location. This is a very precise scale - the display may seem to wander or jump when
weighing. This is due to air currents or vibrations. Stable weighing is achieved when the display remains fixed for 3 seconds.
Battery Operation:
1) Two CR2032 batteries are required.
2) To install batteries:
a) Release the battery cover by sliding out sideways.
b) Place batteries into battery compartment aligned correctly.
c) Replace battery cover.
3) The scale is now ready for battery operation.
(Advanced users only) CALIBRATION______________________________
IMPORTANT: This scale was professionally factory calibrated before shipment and does NOT need to be recalibrated by the end
user. However, if you wish to recalibrate your scale we provide these instructions for calibration: Repeat calibration if the scale ever
shows Out2. Incorrect calibration can occur if you do not follow the steps exactly. If your scale does not perform accurately,
please try replacing your batteries before you calibrate. You will need a 100gram weight to calibrate this scale. NOTE: if you do
not have access to a 100g weight you can purchase one at your local store or in emergency situations you can use 100g of coins
or weights (ie 20 US Nickels = 100g) as a 100g weight..
1) Turn the scale OFF and Place the it on a Flat, very stable surface
(Be certain the scale is OFF)
2) Press and hold the TARE key for 10 seconds until a random large
number appears on the display - then release the key.
3) Press & release the TARE key again, the display will show 2Ero and then 100.0
4) Gently place a 100 gram weight on the scale and wait 3 seconds.
5) Press the TARE key. The display will show CAL and then PASS,
calibration is complete. Remove the weight, then Press and hold
the key for 5 seconds to turn the scale off.
NOTE: if after calibration your scale does not read accurately, this indicates
calibration error and the calibration process should be repeated more slowly.
Please calibrate on a very stable flat surface
INACCURACY / ERROR___________________________________
The primary reasons for inaccuracy or malfunction are low batteries, incorrect calibration, overload or operating on an unstable
surface. Please keep this in mind and maintain and operate your scale properly. The scale is a precise instrument and must be
handled with the upmost care and caution.
* Power Up Segment Test
When first turning the unit on, all segments of the display will appear as shown below. This display will remain for approximately 2
seconds and then reset to 0.
* Overload
When an applied load exceeds the capacity. “EEEE” will appear on the display. Remove the excessive load immediately!
!Remember: You can permanently damage the scale by overloading it!
* Negative Value
Any tarred value or a value left in memory will be displayed as a negative number once all weight is removed from the unit. Press
tare to re-Zero the unit.
* Auto off
An auto shut off feature is provided to conserve battery power. The unit will automatically turn off after approximately 3 minutes of
Unit (mode) selection: Press and hold the left key to change weight unit You can select g (grams), oz (ounces), dwt
(pennyweight) or ct (carats).
Press this key to turn unit on. Once the unit is on, press and hold the same key for 5 seconds to turn the scale off
* Tray Operation:
The sliding tray of the CCS is designed to protect the scale from accidental overload when it is closed.
Simply slide the cover off of the scale and place it upside-down on the tray. This way you can use it as an expansion tray or to hold
loose items. Note, if you wish to re-zero the scale, simply press the TARE key.
To close the cover simply reinstall it, sliding it back into place from back to front.
NOTE: Always close the cover when storing the scale. Please be sure the cover is fully open before operation.
After the scale is ON, you can press TARE to reset the scale to zero. This can be used for eliminating from a sample (or a
Tray/Container) the weight value of a container weight is permanently removed for the remainder of the procedure. Just turn the
scale ON, place the tray or container on weighing platform, and press the TARE key. The scale will show 0.0 (or 0.00) on the
display and you can add items to the container/tray.
NOTE: When all weight are removed from the weighing tray, the tared value of a container will be displayed as a negative
number. Cycle the power on the scale or press the TARE key to reset the scale to zero.
** These electronic scale are precision instruments. Avoid disturbing environmental conditions such as currents, vibrations, strong
electrical and magnetic fields as well as a rapid change of the ambient temperature.
1) If the Display ever becomes locked showing "Out2", please recalibrate the scale as outlined in the manual
2) If the Display ever becomes locked on LLLL or EEEE, this indicates that the scale was shocked, dropped or otherwise damaged
and the delicate weighing sensors have been damaged. You can try recalibrating the scale (If the sensor has not been hurt too
badly it will work again after recalibration). Otherwise you will have to follow the warranty instructions that came with your scale.
3) If the display becomes locked on 8888, this often indicates low batteries. However sometimes it also may indicate a serious zero
mark error. This means when you turn the scale on, it can't determine what zero is (a slight zero mark error will cause situation #1
above) Thus, if new batteries do not fix this error the scale will have to be sent to us for replacement under our 5 year warranty
4) If the display shows UNST, this means the scale is not stable. Please try operating the scale on a more stable surface and be
sure nothing is on the tray or stuck under the tray when you turn it on. If this situation persists, it may be an indication of fatal load
cell damage. Try calibrating the scale - if this does not work please follow the warranty instructions.
Although the JS is designed to be extremely durable, It’s important that you never overload or drop/shock the scale. Scales are
delicate instruments and unlike Cellular phones, scales have delicate sensors that determine how much an item weighs. If you drop
or shock your scale, these sensors "feel" the shock and are sometimes destroyed. This happens with all digital scales. We design
our scales to be as resistant to shock or drops as possible, however there is no way for us to protect 100% against load cell or
sensor damage. A well-treated scale will provide years of reliable and accurate weighing. However an abused scale will only work
until it’s sensors are damaged.
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