ScienTECH NTEP User manual

Instructions for NTEP models
Instructions for NTEP modelsInstructions for NTEP models
Instructions for NTEP models
SCIENTECH®
NTEP CERTIFIED
11777-D
Scientech-inc.com

Instructions for NTEP models
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Instructions for NTEP models
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Thank you for choosing a Scientech Zeta Series NTEP Legal for Tra e Electronic Balance. Scientech, an ISO9001 registere company, an its
employees are please to provi e you with a balance esigne an manufacture for years of reliable service an prou ly ma e in the U.S.A.
The quality of Scientech balances has been emonstrate by being certifie to carry the “CE” mark of conformity. Please rea this manual com-
pletely before using your balance. This information will enable you to fully utilize your balance an shoul be locate nearby to be use as a
quick reference gui e. The balance is inten e to be use only in the manner outline in this manual. Misuse of the balance may cause pro uct
failure an voi the warranty.
Table of Contents:
Unpacking an Setup: ……………………………………………………………………………..…………………….…………..3
Autocalibration (CAL 1) - Using an External Weight an meteroological sealing...………………………..……………………………...4
Goo Measurement Practices:…………………………………………………………………………..…………………………………...5
Equipment:…………………….……………………………………………………………………..…………………………………...5
Environment:………………….………………………………………………………………………...…………...……………………5
Operator: …………………………………………………………………………………………..……………………………...5
Level the Balance: ……………………………………………………………………………..………………………….……..6
Connect to an Electrical Outlet:………………………………..………………………………………………………………….……...6
Turn the balance on:…………………………………………………………………………………..……………………………….….6
Front Panel Controls: ………………………………………………………………………………..……………………………...7
The ON/OFF (I/O) Button: ……………………………………………………………………..……………………………...7
The RANGE/FUNCTION Button: ……………………………………………………………………..……………………………...7
The ZERO Buttons: ………………………………………………………………………………..……………………………...7
The MODE/UNITS Button:...……………………………………………………………………………..……………………………...7
The SEND Button: ………………………………………………………………………………..……………………………...7
Balance Functions an Features: ……………………………………………………………………..……………………………...8
Front Panel Parts Counting (PCS): ZSP400-NP only …………………………………………………………..…………………...8
Percent Weighing(%): ZSP400-NP only ……………………………………………………………………..…………………...8
Checkweighing / Process Control Limits (HI OK LO): …………………………………………………………..…………………...9
Capacity Tracker: …………………………………………………………………………………………..…..…………..…...9
Selectable Filters, Stability In icator “OK” ………………………………………….………………………………..…………..….....9
Density Determination: ……………………………………………………………………………………………..……………….10
Security Bracket: ……………………………………………………………………………………………..……………….10
RS-232 Interface: …………………………………………………………………………………………………………..…………….11
RS-232 Specifications: ………………………………………………………………………………………………..…………….11
RS-232 Front Panel Configuration: ……………………………………………………………………………………..………..…...11
Using Bi-Directional Communications: …………………………………………………………………………..…………….12
USB: ……………………………………………………………………………………………………………….…..…………….12
Comman s – Balance Control Functions: …………….……………………………..…………………………………………….12
Check Weighing over the remote operation …….………….……………………………..……………………………………...…….14
Optional RS-232 Printers: ……………………………………………………………………………………………..……………….14
Troubleshooting gui e ……….…………………………………………………………………….…………………………………….15
Weighing units an Specifications : …...………………………………………………………..……………………………………..16
Specifications: ……...……………………………………………………..……………………………………..16
Limite Warranty:………….……………………………………………………………..…………………………………...17
Returne Goo s Proce ure: ……………………………………………………..…………………………………….17
Disposal of Electrical an Electronic Equipment: ………………………………..………………………………………17
Environmental Requirements: …………………………………………………………..……………………………………….17
CE Mark: …………………………………………………………………………………………..……………………………………….17
Quick Setup Gui e: …………………………...………………………………..…………………………..……….…18

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Unpacking and Setup:
The balance, weighing pan, remote power supply an win screen are packe in a foam support to protect them
from shock uring shipping an han ling. Save an reuse all packing material for future amage-free ship-
ments.
C oose t e Proper Environment:
The environment in which your balance is use is very important. Air movement, temperature changes,
vibrations, irect sunlight, etc. influences the performance of high precision balances. Therefore, place
your balance on a soli , stur y surface that is free of air currents, vibration an not in irect sunlight. The
surface shoul not be magnetic an shoul be locate away from oors, win ows, heaters, air con itioners
an fans.
BUBBLE LEVEL
ON / OFF KEY
ZERO / TARE
RANGE / FUNCTION KEY
SEND KEY
MODE / UNITS KEY
CAPACITY TRACKER
LEVELING FEET
GLASS WINDSCREEN (ZSP400-NP ONLY)
ZERO / TARE
(FIGURE 5)

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User Action Balance Response
3 Remove any containers or weighing samples
so that nothing is on the weighing pan, then
press the ZERO button.
Zeros are isplaye .
4 Press the RANGE/FUNCTION button. Balance isplay cycles repeate ly through PCS, HI, LO, CAL 1 an %.
5 Press the MODE button when CAL 1
appears.
CAL 1 an a flashing 0 are isplaye .
6 Wait 10 secon s for the balance to stabilize,
then press the ZERO button.
Two alternating weights will begin flashing on the isplay.
7 Place one of the flashing weights in the cen-
ter of the balance’s weighing pan.
The capacity tracker will a vance an stabilize. The isplay stops flashing
The isplay will momentarily blink, the isplay will blank, flash “OK”, then
isplay the calibration weight inclu ing ecimal places. The balance is now
calibrate an returns to the normal weighing mo e.
8 Remove the calibration weight. The isplay returns to zero.
Note: T e balance s ould be connected to an electrical outlet for at least one (1) our prior to calibration and leveled
according to t e Unpacking and Setup section. T e balance was s ipped wit t e calibration seal un-locked.
W en t e scale calibration seal is un-locked t e display will s ow CAL in t e upper left corner of t e LCD.
T e scale is not legal for trade w en CAL is displayed. If CAL is visible you can skip steps 1 & 2.
1. Gain access to the calibration jumper as shown above. Remove the re jumper, this enables the calibration function.
2. Replace the panel an secure with at least one of the screws. Level the balance an connect power an turn the balance on.
9. Turn the balance off an isconnect power. Remove the rear panel as escribe above an
replace the re jumper. Any two pins.
10. Replace the rear panel.
11 Using safety wire an lea tag secure wire through the cross rille screws as shown in Fig 4
an seal.
(Figure 4)
Calibration (CAL1) using an external weig t and meteorological sealing.
Disconnect power. Remove two
screws. Pull panel out to gain access to
calibration jumper. (Figure 1)
Calibration seal jumper.
Shown in locke position.
Remove to calibrate. (Figure 2)
To seal the calibration install
jumper on two a jacent pins.
(Figure 3)

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Good Measurement Practices:
(As quote from the Mass Stan ar s Han book by Troemner, 3-015BKT rev 1/03)
There are numerous steps that one can take in or er to improve the quality of a mass measurement system. However, they usually
fall within three main categories: the equipment, the environment, an the operator. If even one of these areas in neglecte , it can
have a ramatic negative impact on your results. Although these suggestions are not meant to be all encompassing or all-inclusive,
the improvements that can be ma e following these simple gui elines are extraor inary.
Equipment:
1. Select weights that have a tolerance that is one thir or better than the accuracy you require for your application. This way
the error of the weight will not ramatically impact the quality of your measurements.
2. The equipment must be of sufficient rea ability to calibrate or measure the weight or sample un er test.
3. The balance shoul be place on a stable platform free from the effects of vibration. The most common type of setup
involves placing the instrument onto a balance table that is constructe of marble or granite.
4. Never use a balance or scale as soon as it is turne on (plugge in). The internal electronic components nee to stabilize an
“warm up” for at least 24 hours once the equipment has been energize . Troemner recommen s that you leave this
instrument plugge in twenty four hours a ay, seven ays a week.
5. Never use a balance that has been i le for several hours without first "exercising it" an calibrating it. A balance is exercise
by repeate ly placing an removing weights from the balance pan. We recommen that this be one at least ten times each
with a weight that is 100% of the max capacity of the balance. After exercising, the balance shoul be calibrate . If these
two techniques are consistently employe , a noticeable improvement will result in both linearity an stability of the
measurement.
6. When weights are not in use, store them in the case in which they were supplie . If the weights were not supplie with a case,
either purchase a case or use a clean container to protect the surfaces. This will keep airborne particles from getting on your
weights between uses. Weights shoul be in thermal equilibrium with the balance so store weights near your balance.
Another option is to leave calibration masses commonly use insi e the weighing chamber when not in use. This assures your
weights are in thermal equilibrium with the balance pro ucing a better measurement.
Environment:
1. The more stable your environment, the better your measurement results. Changes in temperature, pressure, an humi ity
affect balance performance an weight stability. I eal room con itions are 20º C with a relative humi ity between 45% an
60%. Fluctuations in temperature shoul not excee 1º C per hour. Humi ity fluctuations shoul not excee 10% per hour.
2. Balances shoul not be place in close proximity to anything that shakes, vibrates, or stirs violently. Avoi placing your
equipment near centrifuges, vortexers, or shakers.
3. Do not place your balance an /or scale near anything that generates heat. Heat will cause the balance chamber to warm an
ue to the effects of the thermal expansion intro uce large errors into your measurement. Do not place the balance near a
win ow. Sunlight can penetrate the win ow, warm the balance chamber at ifferent rates uring the ay, an affect the
quality of your work.
4. Avoi placing the balance near sources of rafts, extreme air currents, or near air-con itioning vents. These positions can
cause your rea ings to be unstable an can ramatically cool the balance chamber when the air-con itioning system begins
to run.
5. The measurement environment shoul be clean an free of excessive contaminants. Contaminants such as irt an grease can
a versely affect the weight of an object.
6. Static electricity on glass win screens or flasks can cause erroneous rea ings. Use a static wipe from time to time.
Operator:
1. Never touch a weight with your bare han s. Oils an contaminants from your han will be transferre to the weight an
intro uce a significant error. It is recommen e that all weights be manipulate with glove han s or forceps. The two types
of gloves that are commonly use an accepte are either latex (pow erless) or cotton. Avoi any metal to metal contact
when han ling or storing weights. This will cause scratches that may intro uce error. All weight forceps an weight lifters
shoul be either nonmetallic (plastic or woo ) or if metal, covere with a soft protective coating or material to avoi scratches.
2. Place the weight or sample near the center of the balance pan. A small offset from center can have a pronounce effect
an intro uce un ue variation.
3. Take special care not to breathe onto the weight or into the balance chamber. Back away from the instrument. This will
prevent any thermal transfer of heat from your breath or bo y to the balance, the weight, or the sample.
4. Time your measurements. Consistent sample times will provi e more consistent measurement.
5. Weigh liqui s or gels in a close container. Moisture or solvent loss can easily be etecte by a laboratory balance.

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Level t e Balance:
A just (turn) the front feet (see Figure 6) to level the balance by centering the bubble in the level in icator which is shown in
Figure 5. Turning the foot as shown below raises that si e of the balance an an opposite a justment lowers it. When properly
a juste the metal center shaft of the assembly will protru e from the center of the plastic foot an will support the balance.
The plastic foot will be raise up against the bottom of the balance an will not be touching the weighing table.
Connect to an Electrical Outlet:
The balance is supplie with a 100/240, 50/60 Hz automatic switching, remote power supply.
Note: First plug t e round connector into t e balance’s rear panel receptacle. T en, plug t e power supply into an
AC outlet.
Note: Scientec recommends t at t e balance be plugged into an electrical outlet at all times. T is ensures t e balance is
always warmed up and ready for use. You can leave t e balance on as it consumes < 5 Watts.
Thumbwheel turns but oes not move up or own.
A shaft within the thumbwheel is exten e or re-
tracte . This prevents “walking” of the scale an
prevents marring table tops.
Outside temperature range:
If the scales internal temperature is outsi e the specifie range of 12ºC to 30ºC the isplay will show ashes an LO
(Below 12ºC) or HI (Above 30ºC)
Excessive rate of c ange:
The isplay will show ashes an both HI an LO.
Turning the thumbwheel counter-
clockwise will raise that corner.
After the balance has been plugge in an turne on, allow it to warm up for at least 1 hour, then follow the Autocalibration
instructions to calibrate the balance.
(Figure 6)
Figure 7
ZSP 150-NJ
ZSP400-NJ
ZSP 400-NP

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Front Panel Controls:
Note: T e annunciators , σ and are s own in Figure 7, but are not available t roug any front panel controls.
However, t ese functions along wit all ot er front panel functions are available t roug RS-232 commands. T ese
commands are discussed later in t e RS-232 section of t e manual.
T e ON/OFF (I/O) Button:
The ON/OFF button is locate in the upper left corner of the balance’s front panel. When the balance is off, pressing the button
will start the turn on sequence shown in Figure 7. During this sequence the balance is oing an automatic systems checkout to
insure it is functioning properly.
When the balance is on, pressing the ON/OFF button will turn off the isplay.
Refer to figure 5
T e RANGE/FUNCTION Button:
Pressing the RANGE/FUNCTION button begins the following menus cycle:
• PCS – Front panel parts counting . ZSP400-NP only.
• HI LO – Checkweighing.
• CAL1— Span Calibration : Only available when calibration seal is eactivate .
● % - percent weighing . ZSP400-NP only.
To select the esire function, press the MODE/UNITS switch when it appears on the isplay.
T e ZERO Buttons:
There are two (2) ZERO buttons. Pressing either button at any time returns the isplay to zeros. When a weighing that has been
zeroe out is remove from the weighing pan, a negative rea ing is isplaye . To return the isplay to zeros, press one of the ZERO
buttons.
Note: T e balance will not zero during a disturbance.
T e MODE / UNITS Button:
Pressing the MODE/UNITS button starts the unit of weight cycle as follows:
● For –NP mo els: grams(g) an milligrams(mg) only.
● For –NJ mo els:grams(g), carats(ct), pennyweights( wt), troy ounces(ozt) an ounces(oz)
When the esire unit of weight appears, press the MODE/UNITS button a secon time to select that unit of weight.
T e SEND Button:
Pressing the SEND button sen s the information on the balance’s isplay to an external evice via the RS-232 interface.
Note: Scientec balances are DTE (computer) devices. If communicating to anot er DTE device (ie computer),
a Scientec RS-232 cable, PN11897, null modem cable is required. If you are communicating to a DCE device (printer),
a 9 pin to 25 pin serial cable #10170 is required, t is can be purc ased t roug Scientec .
You may sen the time an ate along with the weight rea ing when you press the SEND button or you may sen weight rea ings
automatically at user specifie time perio s (see the Bi- irectional RS-232 Comman Set section for etails). Weight rea ings may
also be sent to a computer or printer continuously every 200 millisecon s (see the RS-232 Front Panel Configuration section for
etails). Weight rea ings may be sent automatically when the balance reaches stability (see Selectable Filters section).

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User Action Balance Response
1 Press the RANGE / FUNCTION button. Display cycles repeate ly through PCS, HI-LO, ₸, an %.
2 Press the MODE/UNITS button when
PCS appears on the isplay.
PCS an 0 flash. This is a prompt to zero the balance with the container that will hol
the pieces on the weighing pan.
3 Place the empty container on the pan,
wait 10 secon s for the balance to stabi-
lize, an then press the ZERO button.
PCS an 10 flash. This is a prompt to place 10 pieces in the container.
4 Place 10 pieces in the container, wait 10
secon s, an then press the ZERO button.
PCS an 10 appears on the isplay. You may now a a itional pieces an rea ings
may be taken when the stability in icator OK is shown.
5 When you wish to count something else,
press the MODE/UNITS button.
You are now back at Step 2 with a flashing PCS an 0.
6 If you want to exit the counting mo e,
press the MODE/UNITS button twice.
The balance returns to normal operation.
Front Panel Parts Counting (PCS): ZSP400-NP only.
Note: T e minimum individual piece weig t is 30mg. If t e initial 10 piece sample size as a cumulative weig t less t an
300mg w en t e ZERO button is pressed t e display will blank and t e LO annunciator will flas for t ree seconds
and t e part counting mode will terminate and t e balance will return to t e normal weig ing mode
Percent Weig ing (%): ZSP400-NP only.
User Action Balance Response
1 Place an empty container on the weighing
pan an press the ZERO button.
Zeros are isplaye .
2 Place the sample which represents 100%
in the weighing container.
Display in icates the weight of the sample in the unit of measure you have selecte .
3 Press the RANGE / FUNCTION button Display cycles repeate ly through PCS, HI-LO, ₸, an %.
4 Press the MODE/UNITS button when %
appears on the isplay.
Display will in icate % an 100.01 This means that the weight on the pan now repre-
sents 100.0%. You are now in the percent weighing mo e with all weight rea ings
isplaye as a percent of the weight of the sample use in Step 2.
5 If you want to exit the percent weighing
mo e, press the MODE/UNITS button.
The balance returns to normal operation.
Note 1. Displays three ecimal places for weights above ½ capacity of the balance.
Displays two ecimal places for weights below ½ capacity.
Displays one ecimal place for weights below 5% capacity.
Displays Err below 1% capacity.

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C eckweig ing / Process Control Limits (HI OK LO):
User Action Balance Response
1 Press the RANGE / FUNCTION button. Display cycles repeate ly through PCS, HI-LO,
an %.
2 Press the MODE button when HI LO appears on
the isplay.
HI, LO an 0 flash.
3 Press the ZERO button. HI flashes an zero is isplaye .
4 Place weight on the weighing pan which represents
the upper control limit of the acceptable weight
range.
HI flashes an the upper weight limit is isplaye .
5 Press the ZERO button. LO flashes an the upper weight limit is isplaye .
6 Remove the upper limit weight an place weight
on the weighing pan which represents the lower
control limit of the acceptable weight range.
LO flashes an the lower weight limit is isplaye .
7 Press the ZERO button. OK an the lower weight limit are isplaye .
8 Remove the lower limit weight. LO appears an zeros are isplaye .
The balance is now rea y to check weigh samples. The balance isplays OK along with the weight of the sample if the sample is
within the acceptable weight range. If the sample is too heavy, HI an the weight are isplaye . If the sample is too light, LO
an the weight are isplaye .
To exit check weighing, press the MODE button. The balance then returns to normal operation.
Capacity Tracker:
The capacity tracker provi es a graphic isplay of the use an unuse portions of the weighing range an is shown in Figure 7.
Each segment represents 10% of the balance's total capacity. As 10% of the balance’s capacity is use the first segment will illu-
minate. As 20% of the balance’s capacity is reache the secon segment will light an so on.
.
Selectable Filters:
All balances are equippe with three user-selectable vibration filters which re uce nervous rea ings in varying weighing con-
itions. The balance was elivere to you set in the normal filtering mo e (Fil Nor). Low filtering (Fil Lo) can be selecte for
faster response an high filtering (Fil HI) can be selecte for noisier con itions.
The stability in icator, “OK”, is illuminate when the variance of the rea ings are below the preset stability parameters as
selecte by the user. The stability in icator is useful in etermining the stability of the weighing environment. In normal
weighing the OK stability in icator shoul come on within five secon s after the sample has been place on the pan an the
win screen is close . If the stability in icator oes not come on or takes a very long time this in icates it is too noisy of an
environment for that level. Try improving the environment or raise the filter level to enter the selection mo e procee as fol-
lows: To exit the selection mo e an return to normal operation, turn the balance off an then back on again at any time.

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Density Determination:
Scientech oes not offer a ensity etermination kit nor o you nee one to etermine ensity. Density is mass (grams) per
unit volume (cubic centimeters).
In or er to etermine ensity of a soli , place a gra uate flask with a known volume of water on the pan of the balance,
tare the balance, an then place the soli in the flask of water. Divi e the isplaye weight in grams by the increase vol-
ume of water. The result is the mass per unit volume of the soli in g/cc.
To etermine the ensity of a liqui , place an empty gra uate flask on the balance weighing pan, tare the balance, then
pour the liqui into the gra uate flask. Divi e the isplaye weight in grams by the volume of the liqui . The result is the
mass per unit volume of the liqui in g/cc.
Security Bracket:
A security bracket is provi e on the balance’s rear panel as a convenient metho of securing the balance.
User Action Balance Response
1 Press ON/OFF an MODE/UNITS
simultaneously.
The current filter, Fil nor (filtering normal), Fil
Lo (filtering low), or Fil HI (filtering high) an
OK are isplaye .
2 Press the SEND button until the esire vibra-
tion filter is isplaye . Then press the RANGE/
FUNCTION button to save the setting.
Balance shows SAVED an returns to normal
weighing. The balance will remain in the cho-
sen filter setting even if turne off an back on
Selectable Filters:

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RS-232 Interface:
Note: Scientec balances are DTE (computer) devices. If communicating to anot er DTE device (ie
computer), a Scientec RS-232 cable, PN11897, or normal null modem cable is required. If you
are communicating to a DCE device (printer), a serial cable is required. Scientec offers a serial
cable, PN11367, for your convenience.
Your balance is equippe with a bi- irectional RS-232 compatible inter-
face. The RS-232 connector is a 9 pin D subminiature connector locate
on the balance rear panel. The pin out an pin escriptions are shown
here.
RS-232 Specifications:
Type EIA-RS-232C, DTE
Metho Half- uplex, Asynchronous Transmission, Bi- irectional
Format 4800, 9600 an 19,200 bau rate selectable ( efault is 9600)
Co e: ASCII
For parity Even or O : Data bit 7, Stop bit 1.
For parity none: Data bit 8, Stop bit 1.
RS-232 Front Panel Configuration:
Before using the RS-232 feature of your balance, it is necessary to configure the interface properly for your
application. The RS-232 Configuration Mo e allows you to set bau rate, auto sen , continuous sen , sen
when stable an isplay blanking. The balance is configure with efaults at the factory. The efault mo es is
9600 bau , no parity.
It is not necessary to follow the entire configuration proce ure if only one parameter is to be change . Use step
1 to enter the menu an press MODE/UNITS to scroll through the ifferent parameters. When the esire
parameter is isplaye the SEND key will scroll through the settings for that parameter. Pressing the
RANGE /FUNCTION at any time will save the settings an return to normal weighing mo e.
Your terminal program an the balance must have the same bau rate an parity to work. If you choose NONE
for parity please set your terminal program to 8 ata bits, 7 ata bits for EVEN or ODD parity.
To enter the RS-232 configuration mo e via the front panel, procee as follows:
User Action Balance Response
1 Press ON/OFF an SEND simultaneously. The current bau rate br4800, br9600, or
br19,200 is isplaye .
2 Press the SEND button until the esire bau rate
is isplaye .
3 Press the MODE/UNITS button. The current parity even, o or none is isplaye .
4 Press the SEND button until the esire parity is
isplaye .
5 Press the MODE/UNITS button. Auto sen AS ON or AS OFF is isplaye
6 Press the SEND button until the esire auto sen
mo e is isplaye .
7 Press the MODE/UNITS button. Continuous sen CS ON or CS OFF is isplaye

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8 Press the SEND button until the esire
continuous sen mo e is isplaye .
9 Press the MODE/UNITS button. Sen when Stable SS ON or SS OFF is
isplaye
10 Press the SEND button until the esire
Sen when stable mo e is isplaye .
11 Press the MODE/UNITS button. Display blinking mo e BL ON or BL OFF is
isplaye
12 Press the SEND button until the esire
blinking mo e is isplaye .
13 Press RANGE/FUNCTION button. SAVE is isplaye briefly an the scale returns
to normal weighing mo e.
User Action Balance Response
Using Bi-Directional Communications:
Scientech electronic balances, interface to a computer via the RS-232 port, can be controlle by a computer
program. Any programming language with access to the RS-232 interface can be use to program this control.
The balance expects ASCII character instruction strings an respon s with ASCII character ata strings. All
characters with an ASCII value less than the space character ( ecimal 32 of hex 20), are ignore by the balanc-
es.
USB:
The RS-232 an USB ports share the same internal communication port. All comman s escribe by the
RS-232 are vali for the USB as well. The balance utilizes a CP-2102 serial bri ge architecture. The USB con-
nector is a type B locate on the rear panel of the balance.
Commands – Balance Control Functions:
The following comman s can be sent to the balance in any combination of upper an lower case characters.
No action is taken by the balance until it receives a carriage return in icating the en of the comman string.
Type all comman s as shown .
↵ = Carriage return
Command Response Purpose
CLEAR↵ OK Balance in normal mo e Exit any special weighing mo e imme iately,
clears statistics . Does not tare balance.
GRAMS↵ OK grams selecte 1 Places balance in Grams.
CARATS↵ OK carats selecte 1 Places balance in Carats.
DWT↵ OK pennyweight selecte 1 Places balance in pennyweight.

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Command Response Purpose
OZT↵ OK troy ounces selecte Places balance in Troy Ounces.
OZ↵ OK ounces selecte Places balance in Ounces (a vp)
XAVG↵ #N XX.XXX U1 Accumulates the current weight in the XBAR
registers.
RESET_XAVG↵ None Clears the XBAR registers.
RCL_XAVG↵ Mean XX.XXX U1
Maximum XX.XXX U1
Minimum XX.XXX U1
St Dev XX.XXX U1
CV XX.XXXX %
N Integer Samples
Sen s statistics of samples
GLP↵ Sen s GLP hea er Puts balance in the GLP mo e.
ISO↵ Sen s ISO hea er an waits
for target weight entry
Puts balance in ISO mo e.
TARG XX.XXX↵2 XX.XXX g TARGET EN-
TERED
Enter target weight value in grams.
SEND↵ Sen s weight, ifference be-
tween weight an target, an
signature line
Terminates ISO mo e.
ASON↵ or ASOFF↵ Output the current weight at
the interval specifie by
ASINT
Turns auto sen on or off. When auto sen is
on, a time interval must be entere . See SETA-
SINT
ASINT n Auto Sen Interval n Secon s Sets the auto sen interval in Secon s
CSON↵ or CSOFF↵ Output the current weight at
every 200mS
Turns continuous sen on or off.
SSON↵ or SSOFF↵ Output the current weight
when the OK annunciator ap-
pear in the isplay.
Turns sen when stable on or off.
READCLOCK↵ Current ate an time
1. U = the unit of weight i.e. g grams
2. The target weight shoul be entere with 3 ecimal places of accuracy. i.e. 100.000
STORE TIME_STAMP_ENABLE N↵
N=0 Disables time stamping of weight ata. N=1 Enables time stamping of weight ata.
Note the single space between STORE an TIME_STAMP_ENABLE an a single space before N.
STORE STABILITY_INDICATOR_ENABLE N↵
N=0 Turns the stability in icator “OK” off. N=1 Turns the stability in icator “OK” on.
Note the single space between STORE an STABILITY_INDICATOR_ENABLE an a single space before N.
When the weight is stable it will be transmitte to the remote interface.

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STORE START_OPTION N↵
N = 0 Requires the ON/OFF button to be presse to turn on
N = 1 Starts up as soon as power is applie . Balance oes self test an then goes into normal weighing.
N = 2 Starts up as soon as power is applie . Bypasses self test an goes i irectly into normal weighing.
Note the single space between STORE an START_OPTION an a single space before N.
SETCLOCK MM/DD/YY HH:MM:SS↵
Sets the real time clock to the ate an time entere . The RTC is battery powere an will keep time for
months without external power.
Note the single space between SETCLOCK an MM/DD/YY an HH:MM:SS.
ASINT S↵
S = Number of secon s between output
Note the single space between ASINT an S.
This is the Auto Sen interval in secon s.
C eck weig ing over t e remote operation.
Check weighing is also available from the I/O using the SETCHKWGT <high limit> <low limit> comman .
Example:
SETCHKWGT 137.556 135.2 ↵
places the balance in check weighing mo e with the high limit set to 137.556 an the low limit set to 135.2
Note there is a space between SETCHKWGT an 137.556 an another space between 137.556 an 135.2
SETCHKWGT uses the current unit of measure. If the balance is in grams the <high limit> <low limit> num-
bers are expresse in grams as well.
Optional RS-232 Printers:
Please contact Scientech or one of our representatives for more information. A comprehensive manual is in-
clu e with each printer when purchase . All printers are set for a 9600 bau rate an even parity. To change
these settings please see the printer manual an the RS-232 Front Panel Configuration section. The balance
isplay contents can be sent to the printer at any time by pressing the balance front panel SEND button.
Many other accessories are available. Please contact Scientech at 303-444-1361 or 800-525-0522 or email us at
[e-mail] for more information.

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15
Problem Possible Cause Possible Solution
The isplay is blank *Balance not turne on
*Power cable not plugge in
*No power from AC outlet
*Press ON/OFF switch
*Plug in cable, press ON/OFF
switch
*Turn on circuit breaker
*Change AC outlets
OL appears in isplay *Maximum capacity excee e *Re uce container weight
*Weigh sample in smaller incre-
ments
UL appears in isplay *Pan is not in place
*Balance is out of range
*Insure pan is positione properly
*Press ZERO switch
The isplay is unstable *Drafts (air currents are present)
*Vibrations are present
*Install win screen, relocate bal-
ance
*Isolate balance from vibration,
relocate balance
Weight rea ings are incorrect *Balance is out of calibration
*Balance is not level
*Display was not zeroe before
weight was place on pan
*Object being weighe is touching
win screen or balance case top
*Unit of weight selection is incor-
rect
*Recalibrate balance
*Level balance
*Press ZERO switch before
weighing
*Reposition object
*Select proper weighing mo e
Display stays in turn on sequence *Pan not in place
*Drafts or vibrations present
*New win screen has been in-
stalle
*Power supply connecte to wall
outlet before balance connector
*Place pan on balance
*Isolate or relocate balance
*Unplug power supply from wall
then replug into wall
Troubles ooting Guide.

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16
Model ZSP150-NJ ZSP400-NJ ZSP400-NP
Weighing Mo e Single Range
Tare Range (grams) 150 400
Repeatability (grams)
(stan ar eviation)
0.0015g
Linearity (grams) ±0.0015g
Stabilization Time User Selectable
Weighing Spee A aptive
Weighing Units Grams, Carats, Pennyweight, OzT, Oz grams, milligrams
Display Up ate Interval (ms) 200ms
Date Interface Bi irectional RS-232 & USB with bau rates of 4800, 9600 an 19,200
Weighing Pan Size Circular 4.5 inch iameter
Operating Temperature 12°C to 30°C
Relative Humi ity 80% for temperatures up to 31ºC ecreasing linearly to 50% at 40ºC
Power Supply Automatic switching 115/230 Volts, 50/60 Hz ± 10%
Win screen Analytical Win screen
Calibration Weight (grams) 150 / 100 400 / 200
Housing 7.5”W x 11.25”D x 3.25”H
Weight (poun s) ≈9.5
Optional
Specifications for:
ZSP150-NJ (Capacity, , e) ZSP400-NJ (Capacity, , e) ZSP400-NP( Capacity, , e)
Grams 150g, = .001g , e = .01g 400g, = .001g , e = .01g 400g, = .001g , e = .01g
milligrams N.A. N.A. 400000mg, = 1mg , e = 10mg
Carat 150c, = .001c , e = .01c 400c, = .001c , e = .01c N.A
Pennyweight 96.4 wt, = .001 wt , e = .01 wt 257 wt, = .001 wt , e = .01 wt N.A
Ounce T 4.8ozt, = .0001ozt , e = .001ozt 12.8ozt, = .0001ozt , e = .001ozt N.A
Ounce av p. 5.3oz, = .0001oz , e = .001oz 14.1oz, = .0001oz , e = .001oz N.A
NCWM—NTEP Certificate Number 07-017
Weig ing Units and Specifications:

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17
Limited Warranty:
All Scientech Zeta Series Electronic Balances an their accessories are warrante against efects in materials an workmanship for five
(5) years from the ate of shipment. During the warranty perio , Scientech will repair, or at its option replace at no charge, components
that prove to be efective. The equipment must be returne , shipping prepai , to Scientech's pro uct service facility. This limite war-
ranty oes not apply if the equipment is amage by acci ent or misuse or as a result of service or mo ification by other than a Sci-
entech service facility. The foregoing warranty is in lieu of all other warranties expresse or implie inclu ing but not limite any im-
plie warranty of merchantability, fitness, or a equacy for any particular purpose or use. Scientech, Inc. shall not be liable for any spe-
cial inci ental or consequential amages whether in contract, tort or otherwise.
Returned Goods Procedure:
Shoul it become necessary to return any item to Scientech for any reason, please contact our Pro uct Service Department at (800) 525-
0522 or [phone] or Fax [phone] or E-mail i[email protected]m. When you contact us, please be rea y to provi e the
mo el number, serial number an a escription of the problem. Frequently we can provi e self-help information that will eliminate the
nee for returning the unit.
If equipment return is require , please pack the items in the original box an packing material. As an alternate, place equipment in a
snug fitting box, then pack that box in a larger box with at least four inches of packing material between the two boxes. Scientech oes
not assume responsibility for un er packe items.
Please inclu e the name an phone number of the person to contact regar ing repair question(s).
Normally, pro ucts are repaire an shippe within 5 working ays after their arrival at the pro uct service facility. This is an average
time an coul vary epen ing on the workloa .
Shipping A ress: Scientech, Inc.
5649 Arapahoe Avenue
Boul er, CO 80303
U.S.A.
Disposal of Electrical and Electronic Equipment:
Scientech, Inc. recommen s the following for isposal of electrical an electronic equipment:
1. The best option is to reuse the equipment in its entirety.
2. Where the equipment can not be reuse in its entirety, priority shoul be given to reuse of its subassemblies an components.
Where reuse is not appropriate, electrical an electronic equipment, inclu ing batteries, shoul be recycle accor ing to local or inanc-
es. It shoul never be mixe with municipal waste.
Environmental Requirements:
This pro uct is inten e for in oor use at altitu es up to 2000 meters, Pollution Degree 1 or 2 in accor ance with IEC 664 an transient
overvoltages accor ing to Installation Categories (Overvoltage Categories) I, II an III. For mains supply, the minimum an normal
category is II.
CE Mark:
All Scientech Electronic Balances carry the CE Mark an conform to the requirements of the following stan ar s:
EN 55011: 2009 + A1 :2010 (Class A, Group 1) Limits an Metho s of Measurement of Ra io Disturbance Characteristics
of In ustrial, Scientific an Me ical (ISM) Ra io-frequency Equipment
EN 61326-1: 2013 EMC Requirements for Electrical Equipment for Measurement, Control an Laboratory Use
EN 61010-1: 2010 Safety Requirements for Electrical Equipment for Measurement, Control an Laboratory Use

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