Starrett 799A Series User manual

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1 - Jaws for external measurement
- Patas para medición de exteriores
- Mâchoires pour mesures extérieures
- Ganasce per misurazione di esterni
- Messschenkel für Außenmessung
- 外尺寸测量卡爪
- Faces para medição externa
2 - Jaws for internal measurement
- Patas para medición de interiores
- Mâchoires pour mesures intérieures
- Ganasce per misurazione di interni
- Messschenkel für Innenmessung
- 内尺寸测量卡爪
- Faces para medição interna
3 - Depth measuring rod
- Varilla para medición de profundidad
- Tige de profondeur
- Asta di misurazione della profondità
- Tiefenmessstange
- 深度测杆
- Haste para medição de profundidade
4 - Scribing face
- Superficie de trazado
- Face de traçage
- Superficie di tracciatura
- Anreißfläche
- 划线面
- Superfície para traçagem
5 - Slide
- Cursor
- Coulisse
- Corsoio
- Schieber
- 滑动读数头
- Cursor
6 - Graduated scale
- Escala graduada
- Barre graduée
- Scala graduata
- Schiene mit Strichskala
- 刻度尺身
- Escala graduada
7 - LCD display
- Visualizador de cristal líquido
- Affichage à cristaux liquides
- Display LCD
- Display
- LCD 显示
- Mostrador de cristal líquido
8 - Slide locking screw
- Tornillo de fijación del cursor
- Vis de blocage de la coulisse
- Vite di bloccaggio corsoio
- Feststellschraube
- 滑动头锁紧螺钉
- Parafuso de fixação do cursor
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9 - Battery cover
- Tapa de la batería
- Couvercle de pile
- Coperchio batteria
- Batteriefachdeckel
- 电池盖
- Tampa da bateria
10 - Scribing reference face
- Superficie de referencia para trazado
- Surface de référence pour le traçage
- Superficie di tracciatura di
riferimento
- Stufenmessschenkel
- 划线基准面
- Superfície de referência para
traçagem
11 - Fine adjustment thumb roll
- Rodillo de ajuste fino
- Bouton de réglage précis
- Rotella per l’accostamento fine
- Feineinstellung
- 滚轮
- Roldana para ajuste fino
12 - “Zero” set button
- Botón para hacer “Cero” - ZERO
- Bouton de remise à “zéro”
- Pulsante “zero”
- Nullpunkteinstellung “Zero”
- “置零” 键
- Botão de zeragem “ZERO”
13 - “mm/IN” button
- Botón de conversión pulgada/
milímetro “mm/IN”
- Bouton “mm/po”
- Pulsante “mm/IN”
- Umschaltung “Zoll / mm”
- “公 英制” 转换键
- Botão de conversão polegada/
milímetro “mm/IN”
14 - Power “on/off” button
- Botón encendido/apagado “on/off”
- Bouton “marche/arrêt” “on/off”
- Pulsante di alimentazione “on/off”
- An/Aus-Taste “on/off”
- “开/关” 键
- Botão liga/desliga “on/off”
NOTE: The pictures shown are
illustrative; the components may
vary according to the model.
Obs.: Las guras aquí presentadas
son ilustrativas, los componentes
pueden cambiar conforme el
modelo del instrumento.
NOTE: Les illustrations permettent
de fournir des explications; les
composantes peuvent varier selon
les modèles.
NOTA: le gure sono solo a scopo
illustrativo; i componenti possono
variare a seconda del modello.
HINWEIS: Die gezeigten Bilder
haben nur Beispielcharakter; die
Bauteile variieren von Modell zu
Modell.
注意: 图片仅供参考，根据型号不
同可能会有所不同.
Obs.: As guras aqui apresentadas
são ilustrativas, os componentes
podem variar conforme o modelo
do instrumento.
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Electronic Digital Caliper
799A Series
Characteristics
Millimeter Inch Range
mm (inch)
Resolution (1) 0,01 0,0005 Up to 300 (12”)
Accuracy (2) ± 0,02 ± 0,001 Up to 100 (4”)
± 0,03 ± 0,001 > 100 (4”) up to 300 (12”)
(1) Resolution: Smallest difference between indications of a displaying device that can be meaningfully
distinguished. For a digital displaying device, this is the change in the indication when the least significant
digit changes by one step (VIM).
(2) Accuracy: Closeness of the agreement between the result of a measurement and a true value of the
measurand (VIM).
P.S.: VIM - International Metrology Vocabulary
■Set zero at any position of the slide.
■Power on/off button.
■Automatic on when moving the slide.
■Automatic off after seven minutes of non-use to save the battery life.
■Off at any position of the slide; the last zero will be kept.
■LCD display with active unit system: millimeter “mm” or inch “in”.
■Lithium battery 3V CR2032.
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Precautions when using the Caliper
■Do not measure a rotating part; it is dangerous and causes the faces in
contact to wear.
■Do not expose the caliper to direct sunlight or extreme temperatures.
■Do not apply any voltage on any part of the caliper. Any external voltage
may damage the circuitry of the caliper.
■Do not disassemble the caliper.
■Do not move the slide too fast (over 1,5m/s or 60 inches/s), this can cause
measurement errors.
■Flashing of digits shows a weak battery and that it must be replaced.
■Do not wash or immerse the caliper in any liquid.
■When cleaning the caliper, use a fabric lightly wet in isopropyl alcohol.
■Keep the caliper clean and dry.
■Avoid handling the caliper with oily hands.
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Operating Instructions
■Install the battery that comes with the instrument. See item “Installation/
Replacement of battery”. Once installed the caliper will come on
automatically.
■To select the measurement unit needed, press the “mm/IN” button (13).
■To move the slide (5) loosen the slide locking screw (8). Use the thumb
roll (11) to move the slide.
■Check to see if the buttons “zero” (12) and “mm/IN” (13) respond well.
Digital display must be stable and display at any position within the whole
range.
■Clean the measuring faces with a lint-free cloth or chamois.
■External measurement: Close the jaws and press the “zero” button (12) to
reset the display to zero (fig. 1A ). Put the part to be measured as close as
possible to the scale (6) (fig. 1B) and adjust the measuring faces (1) to the
part surface (fig. 1C). Do not apply excessive pressure when measuring
(fig. 2).
■Internal measurement: Close the jaws and press the “zero” button (12) to
reset the display to zero (fig. 3A). Introduce the internal measuring jaws (2)
as deep as possible inside the part and adjust the measuring faces to the
part surface (fig. 3B). To obtain the measurement of an internal diameter
see fig. 3C and to obtain the measurement value inside a slot see fig. 3D.
■Depth measurement: Close the jaws and press the “zero” button (12)
to reset the display to zero (fig. 4A). Keep the depth measuring rod (3)
perpendicularly to the part bottom (fig. 4B & 4C).
■Cam measurement: Close the jaws and press the “zero” button (12) to
reset the display to zero (fig. 5A). Open the jaws in a little bigger dimension
than the cam, place the scribing face (4) against the bottom of the cam and
approach the scribing reference face (10) until the part surface. The cam
value will be shown on the display (fig. 5B).
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■Scribing face: Close the jaws and press the “zero” button (12) to reset the
display to zero (fig. 6A). Adjust the scribing reference face (10) to the part
reference, slide the cursor (5) to the chosen measurement, lock it using the
locking screw (8) and then scribe (fig. 6B).
■Measurement for comparison: Using a standard, press the “zero” button
(12) to reset the display to zero (fig. 7A). After that, start measuring; the
variation will be shown on the display. Dimensions smaller than standard
will be indicated with a negative sign (fig. 7B).
■Measurement of center to center between holes or identical pins: Using
one of the holes or one of the pins as a reference, press the “zero” button
(12) to reset the display to zero (fig. 8A & 9A). After that, start measuring;
the center to center value will be shown on the display (fig. 8B & 9B).
■Measurement of wall thickness: Using a part as reference place the caliper
and press the “zero” button (12) to reset the display to zero (fig. 10A).
Next, measure the depth using the depth measuring rod (3). The thickness
will be shown on the display (fig. 10B).
■Measurement in places where reading is difficult to obtain: Measure and
press the “zero” button (12) to reset the display to zero (fig. 11A). After
that, close the jaws; the measurement will be shown on the display with a
negative sign (fig. 11B) (Do not consider the sign).
Operating Instructions
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Installation / Replacement of battery
Remove the battery cover (9) by sliding it in the arrow direction, then lift it. Install
or replace the battery making sure that the positive pole faces up, and slide the
cover back into place.
Troubleshooting
Failure Cause Solution
Five digits ash
simultaneously, about
once per second.
Low battery. Replace the battery.
Display does not change
when the slide is moved.
Trouble with the
electronic circuitry.
Remove the battery
and reinstall after 30
seconds.
Less accurate than
specied or electronic
system failure.
Contamination on the
sensor.
Clean the scale. If
the problem remains,
contact your distributor.
No display on LCD. 1 - Battery in poor
contact.
2 - Low battery.
1 - Remove the battery
cover and reseat the
battery to insure a good
connection.
2 - Replace the battery.
* THIS IS AN UNCONTROLLED COPY SO THAT THE PRODUCT MAY BE
MODIFIED AT ANY TIME WITHOUT PRIOR NOTICE.
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