op. manual - denver instrument
 MODEL
Capacity
Resolution
FRE
"Аа
Fisher Scientific Electronic Analytical Balances
XA-100
100g
0.1mg
XA-200
200g
0.1mg
Common Specifications All Models
Response Time (stability
Taring Time ........
Pan Diameter ......
t + 46 + ù =
Electrical Requirements ..
Internal Calibration Weight
1
.... Operator variable
„00.0... 1-3 seconds
2000040400, 3%" (8.25cm)
5/230vac, 50/60Hz
—
rr ......100.0000g
XA-250 XA-200D
250g 200/50g
0.1mg 1/0.1mg
XA-200DA
0.1/0.02mg
a >
arm il at
Aa FT
—
+
200/25g
Print
Transmits sample
weight to printer or
computer via RS-232C
data link.
WORK AREA
INSTALLATION
(Set-Up)
: Hits
Auto Cal
[nitiaies automatic
calibration. Internal
weight is automatically
activated and retracted
to permit hand free
calibration.
te ST
ны ии E ны
ey h
ET: Ra
fiat ba Ade ae
Recall
Stores and sums tare
values, clears memory.
Display Lock
Freezes sample weight
value, L prompt
appears until key is
pressed again to
release,
Select an environment suitable for precision weighing
SN
Memory Enter
Stores sample weight;
may be pressed
repeatediy to
accumulate a number
of values and total
them, minus tare; M
prompi appears until
memory is cleared.
Work area should be relatively tree from drafts and vibrations.
Work surface should be level and rigid.
Set Up
Accepts ar changes
default values for
integration time,
automatic rezero. RS-
232C baud rate and
continuous or
command operation of
the PRINT key,
pressing tare bar
returns balance to
normal operation.
Line voltage to the balance should be reasonably constant and free from fluctuations. It is not
advisable to use an outlet that is shared with fluorescent fixtures or other electrical equipment thai
draws voltage in an inconsistent manner.
Do not locate near magnetic materials or equipment/instruments which incorporate magnets in
their design.
Excessive room temperatures above 85°F/29°C or below 60°F/15°C, could affect balance
operation and accuracy.
Remove balance and all accessories from carton, There are no internal packing or tie downs inside
the baiance.
Set voltage select switch to proper voltage (located on back panel)
Select a suitable work surface.
Level balance with leveling feet.
Place the weighing pan in the receptacle.
insert power cord into the receptacle located on the rear panel of the unit. Push the piug in firmly to
assure proper contact.
Plug power cord into power supply. Initially allow a 30 minute warm up period before making any
adjustments to the balance. SERIES XA balances are designed to be continuously plugged in with
power supplied at all times to the unit.
SERIES XA
OPERATION
DUAL RANGE
Models
TARING/
ZEROING
AUTOMATIC
CALIBRATION
DISPLAY LOCK
MEMORY/
MEMORY
RECALL
1. The balance remains “ON” at all times when plugged in and power is supplied. lt is advised to leave
the balance “ON” continuously.
2. Anaudible “BEEP” will be emitted whenever a functions activated. If a key is pressed and a “BEEP”
is not heard, press the key again until a “BEEP” is heard to ensure that function is activated. Some
keys are disabled in some functions.
3. The TARE bar is located across the front of the balance, directly in front of the keyboard. All other
functions of the SERIES XA are controlled directly from the keyboard.
Weigh in the lower capacity / higher sensitivity range until the mass exceeds the lower capacity. When
the mass exceeds the lower capacity this model automatically switches to the higher capacity /lower
sensitivity range with no adjustments by the operator necessary or required. To return to the lower
capacity / higher sensitivity range, Tare the unit.
To Tare or Zero ali SERIES XA balances simply press the TARE BAR located across the front of
the balance.
SERIES XA have tare capabilities up to their total weight capacity. Place sample container on weighing
pan. Press Tare Bar, an audible "BEEP" will be heard and the display will read zeroes. Place sample to
be weighed in the container. The display will indicate only the weight of the sample added. Additional
samples and continuous taring may be done until the capacity of the balance has been exceeded.
All SERIES XA balances feature Auto with an internal weight calibrated to NBS standards for accuracy.
To activate the automatic calibration feature, (with the unit warm and the display
stable) depressthe Tare Bar to zero the display, press “So key. "CALIBRATE" will be displayed briefly,
followed by the calibration weight value (for example “CAL - 100 -" for units with a 100 gram internal
weight). When the calibration weight value is displayed, it indicates calibration is compiete and normal
operation may resume. Press the Tare Bar, display will read out in zeroes, begin sample weighings.
External calibration weights may also be used tor calibration purposes. Remove samples from the pan,
Tare the balance to a zero reading, place calibration weight on pan, press fo key. "CALIBRATE" will be
displayed briefly, followed by the calibration weight value when calibration is complete. The balance will
display "NO CAL” and not complete calibration if weights being used are out of range or balance
capacity is exceeded.
To freeze or lock the display, press the Display key. A capital “L” will appear next to the function symbol
and the display will not change until the Display key is pressed again or the Tare Bar is
depressed.
This function allows the user to store and sum tare values. Pressing Memory stores the displayed value
in memory, clears the display to zero, and places an upper case “M” to the right of the
grams/ stability indicator on the display
Pressing Recall will bring the stored values out of memory and display it. Pressing Recall aiso clears the
upper case "M”.
Multiple weighings may be entered into memory where they will be summed with the values currently in
memory. Pressing Recall will bring the summed values out of memory.
Memory values will be summed to the current value that is being displayed if Recall is pressed when a
displayed mass is on the weighing pan. For example; if there is 100 grams stored in the memory and
there is currently 20 grams on the weighing pan, pressing Recall will bring the 100 grams out of the
memory and add it to displayed value, giving a total displayed weight of 120 grams.
Pp NOTE: ifthe Tare Bar is pressed during a memory operation or when there are values stored in
the memory, the display wil be zeroed and the memory contents will be zeroed, essentially clearing
all operations.
SET-UP
Set-Up is designed to allow the user to change various features of the balance to fit the application.
Features which may be modified are:
A. Filter (Integration) D. 1/0 Printing Speed, BAUD Rate
B. Automatic Zero E. Audible Beeper Control
C. Operation of Print Command
To step through the messages, repeatedly press the Un key or hold it down until the
applicable option appears. To select an option, press the MMO key when the option appears on the
display. Default values may be selected when UN is initially pressed, they are:
1. FILTER (FT) Normal 4. BAUD RATE 300 Baud
2. AUTO-ZERO (AZ) Y Count 5. BEEPER On
3. PRINT Single on demand
FILTER PROCEDURE DISPLAY READS
Push Tí key DEFAULT VL
Push again FILTER
Push again FT - FAST
Push again FT - NORMAL
Push again FT -SLOW
When desired variable appears, push Memory key. Setting the filter will adjust integration time of
balance reading
AUTO-ZERO PROCEDURE DISPLAY READS
Push Un key again AUTO-ZERO
Push again AZO CNT
Push again AZ Y CNT
Push again AZ 1 CNT
When appropriate option appears, push Memory key. Setting the Auto-Zero will adjust the zero
tracking. |
Example: Atthe % CNT setting, the display will zero anytime unitis within % count (on 00g unit %
count is +0.00005) of zero.
Push IT key to advance to PRINT
Push again SINGLE
Push again AFTER STAB
Push again EVERY DISP
"SINGLE" indicates that Print must be pressed to send signal from balance to printer or computer.
computer.
"AFTER STAB?” indicates that balance will automatically send the signal after display stabilizes.
“EVERY DISP” sets the balance to continually send a signa! through [/O port. When desired option
appears, push Memory key to set the balance.
PRINT Print key is designed so user can manually send weighing results to printer or computer when
interfaced. To use:
Push Un key and hold until display shows: “PRINT”
Push Un key and hold until “SINGLE” shows in display, then push Memory key. The balance is
now “set-up” to send the print signal each time Print is pushed.
BAUD RATE PROCEDURE DISPLAY READS
Push Un key to advance to BAUD RATE
BAUD RATE Push again 110
(cond) Push again 300
Push again 600
Push again 1200
Push again 2400
Push again 4800
Push again 9600
When the appropriate baud rate appears, push Enter to set
BEEPER PROCEDURE DISPLAY READS
Push Un key to advance to BEEPER
Push again BEEPER ON
Push again BEEPER OFF
When the appropriate option displayed, press Memory to set the beeper ON or OFF.
INTERFACE APPLICATIONS
NOTE:
Improper connections tothe 1/0 connector may result in damage to the balance!
Technical Specifications
1/0 Connector
The mating connector is a 9 pin subminiature D socket, Cinch DE-9S or equivalent. Pins
utilized are as follows:
PIN # FUNCTION PIN $ FUNCTION
1 Case Ground 3 Data Output
2 Data Input 7 Ground
Signal Definition
The SERIES XA utilizes a level compatible RS-232C interface, with 8 data bits and null parity.
For the balance to interface to the functions, the balance must receive one (1) or two (2) stop
bits and will output two (2) stop bits.
Data output: Voltage output compatibie with RS-232C levels, 300 ohm source resistance and
+10 volt swing minimum.
Data input: Voltage input compatible with RS-232C levels, nominal 3000 ohms input
impedance, £5 volt minimum swing, £20 volts maximum voltage.
Case ground: Tied to earth ground through the power cord.
Signal ground: Tied internally to the case ground.
МО Specifications
The information transfer to and from the balance is accomplished with RS-232C serial
compatible signals, using 8 data bits and null parity. The interface connector is a 9 pin male
subminiature D plug. it is important for the user to determine interface requirements of
equipment connected to the balance. The maximum recommended cable length is 25 feet.
The information is transmitted at variable baud rates (from 110 to 9600) in standard ASCH
format. Baudrates from 110 to 4800 will have less than 1% error factor. A baud rate of 9800 will
be approximately 5% slower than actual rate and may not work with some peripheral
equipment. See “SET-UP” procedures for changing baud rates.
Output Specifications
The function and value displayed on the balance is output in the form:
F<+/ — >VWW./W<er><Ilf>
where Fis the function number, <+/ — >is the sign, VVVV.VV is the value displayed, <cr>is a
carriage return and <I> 1s a line feed. The output only occurs when the stability indicator is on.
The balance will output under control of the print command (?#) or the front pane! print switch.
Input Specifications
itis possible to control the balance from a terminal or computer with RS-232C interface and a
baud rate between 110 and 9600. When interfaced the balance may be tared, functions
changed, output requested from balance, reset to start-up conditions and new scale factors
entered.
1/0 COMMANDS
The following commands can be used to perform the functions. The commands will either be
immediate or must be followed by carriage return, noted by <cr>. The symbol 4 designates a
number following the command letter. Except as noted all commands are upper case.
* RESETS balance to start-up conditions.
T Immediately TARES balance to zero.
2H WI PRINT the cata # number of times. # can be 1 to 9. If #is zero then the
balance will do a continuous output of the data. For example if # = 4 then
the balance will output its data string containing the function number and
weight four times consecutively immediately following receipt of the
command, assuming the balance is stabie. If the balance is unstable it
will wait until the stability indicator is on before outputting the data.
FA FUNCTION select. The balance will go into the function number E. it is
not necessary to remove the welght or tare when changing functions.
The following table lists the function number, mode /tfunction symbol and
function name.
0 P PARTS COUNT 5 G GRAIN
1 g GRAMS 6 С САВАТ
2 d PENNYWEIGHT (DWT) 7 | Av. POUND
3 0 AV. OUNCES 8 S SCRUPLES
4 О TROY OUNCES 9 DRAM
D# DECIMAL POINT POSITION. When in the PARTS COUNT function the
decimal pcint may be positioned as necessary. Position zero is to the
right oi the least significant digit and position seven is to the left of the
seventh digit.
PRHHC> PARTS Recalibration. Allows the user to display a number to represent
the weight on the pan. This can be used for parts counting, check
weighing, or conversion to other weight functions not available withthe F
command. The number ### can be any value from 000001 to 999999,
however care must be exercised when using this command to ensure
accurate results.
LAH<Cr> LOAD command. Allows the user to recalibrate the balance to a new
scale factor when the relationship between the new unit and grams is
known. The value of ## is an eight digit octal number corresponding to
the conversion factor. The conversion factor used for the input is chosen
for the best resolution and stability. The decimal point is then chosen for
the correct units,
10
CAL<cr>
SU
M
message <cr>
E
R
B
GO
G1
H##<<cr>
l##<cer>
KO
K1
N<er>
The CALIBRATE command allows the user to recalibrate the balance
using the allowed calibration weights. To use, place the calibration
weight on the pan and send the calibrate command. The balance will
display CALIBRATE (it may flash very quickly if the balance is able to
complete the calibration without waiting), then return with the new
calibration if possible.
SET-UP allows user to access set-up menu.
For entering any MESSAGE, up to 10 characters for readout on the
display.
ENTERS statistical data.
RECALL statistical data.
CLEARS memory of any/all statistical data.
Turns ON FILL GUIDE.
Turns OFF FILL GUIDE.
Sets HIGH LIMIT for FILL GUIDE.
Sets LOW LIMIT for FILL GUIDE,
Locks out keyboard with exception of PRINT and TARE.
Turns OFF Keyboard Lock
SAMPLE #, allows user to assign first sample number with additional
samples being numbered consecutively. SEE “Statistical Analysis”
section.
12
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising