JScale JS Manual HTML

JENNINGS / JSCALE
JS-120 / 200 / 250 / 275 / 500 MANUAL
PLEASE READ COMPLETE INSTRUCTIONS BEFORE USE

Thank you for purchasing The Jennings JS. With normal care and proper treatment it will provide years of reliable service. Please
read all operating instructions carefully.
.KEEP THE FOLLOWING POINTS IN MIND:
* 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. When
possible allow the scale 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
EXTREME CARE.
*IMPORTANT ADVICE: Place the item to be weighed on the platform, after the stable weight is displayed remove the item
immediately. This will prolong the longevity and accuracy of this weighing instrument.
.** 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.
OPERATION_____________________________________________
Battery Operation:
1) Three “AAA” size ALKALINE batteries are required.
2) To install batteries:
a) Release the battery cover by sliding out-wards.
b) Place batteries into battery compartment aligned correctly.
c) Replace battery cover.
DO NOT USE EXCESSIVE FORCE & DO NOT PRESS ON THE TRAY!!!
3) The scale is now ready for battery operation.

***NOTE: There are 3 Generations of the JScale in the marketplace.

Please see the calibration instructions for your correct model:

*Version 2 & Version 3*: 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 calibration weight
(see below) to calibrate this scale. NOTE: if you do not have access to a
calibration weight you can purchase one at your local store or in emergency
situations you can use coins or weights (ie 20 US Nickels = 100g) as a
calibration weight.
The JS-120 & 275 require a 100gram weight to calibrate
The JS-500 requires a 200gram weight to calibrate
1) Place the scale on a Flat, very stable surface and turn it ON
2) Press and hold the ZERO or UNIT key (depending on model) for 5 seconds until the display
shows CAL - then release the key.
3) Press the ZERO or UNIT key again, the display will flash CAL and then
100.0 (or 200.0)
4) Gently place the weight(s) on the scale and wait 3 seconds.
5) Calibration is complete, Remove the weight and 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 slower.
Please calibrate on a very stable flat surface

Version 1: 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 calibration weight (see below) to calibrate this scale.
NOTE: if you do not have access to a calibration weight you can purchase one at your local store or in emergency situations you
can use coins or weights (ie 20 US Nickels = 100g) as a calibration weight.
The JS-120, 200 & 250 require a 100gram weight to calibrate
The JS-500 requires a 200gram weight to calibrate
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 “ZERO” key for 5 seconds until a random large
number appears on the display - then release the key.
3) Press the ZERO key again, the display will show 2Ero and then
100.0 (or 200.0)
4) Gently place the weight(s) on the scale and wait 3 seconds.
5) Press the ZERO key. The display will show CAL and then PASS,
calibration is complete. Remove the weight and 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 slower.
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.
FEATURE_______________________________________________
* 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. 1:8:8:8:8
* 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!
TROUBLESHOOTING & OPERATION NOTES:
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
program.
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.
KEY PAD FUNCTIONS
* UNIT
Unit (mode) selection: Press and release the key once to change weight unit You can select g (grams), oz (ounces), dwt
(pennyweight) or pcs (parts counting).
* ON/OFF
Press this key to turn unit on. Once the unit is on, press and hold the same key to turn the scale off
* PCS (Count) Sample sizes can be 10, 20, 50 or 100
The following steps outline the procedure for cumulative weighing of samples:
Switch the scale on Use the UNIT key to put the scale into PCS mode. Now press the PCS key once*. The display will show
“S=10“. Put 10 pcs of samples on the platform. Press the UNIT key (to lock in the weight). The display will show “10” and the
scale is ready for counting. *NOTE: You can choose the quantity of samples as 20pcs , 50pcs or 100pcs by pressing the PCS key
multiple times (instead of once). For 20 pc counting, the display will show “S=20". Put 20pcs samples on the platform, then press
the UNIT key. The display will show “20” and the scale is ready for counting. The same instructions can be applied to 50pcs
counting and 100pcs counting
* ZERO (TARE)
Press Zero 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 ZERO 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 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.
* Auto off
An auto shut off feature is provided to conserve battery power. The unit will automatically turn off after approximately 3 minutes of
inactivity.