Seca 755 Since 2002 Service Manual

Service Manual

7551021004

01.10.2006

Variants:

7551021994
7551321004
7551321994
7567021004
7567021994

for seca

Description:
Mechanical Dial scale with BMI function

755 CN / 756 CN

Content:

Operation mod. 755 17-10-06-308 a
Operation mod. 756 17-10-07-508 a

Service Manual Number

17-05-01-327- a

Valid as of:

Function diagram 25-01-02-585
Calibration mod. 755 30-33-01-263 a
Calibration mod. 756 30-33-01-265
Replacement 30-33-01-262
Spare parts Head 30-33-01-261 a
Spare parts baseframe 30-02-00-204 b

Manual number: 17-05-01-327- a

Service manual Justageanweisung / Calibration

2

1

Neigungsjustage / Linearitätsprüfung

-Waage, bis auf Sichtscheibe komplett montiert, belasten.

-Waage 3 x mit Volllast (160 kg) belasten und wieder entlasten.

- Waage an der Nullstelleinrichtung (1) auf 0 stellen.

- Waage mit 160 kg belasten und Neigung mittels Justierschlüssel
15-02-08-204 am Justierkern (2) einstellen.

Achtung hierbei verschiebt sich der Nullpunkt.

-Waage entlasten und erneut auf „0“ stellen.

-Waage erneut belasten, dieser Vorgang ist solange wiederholen, bis folgender Wert erscheint: F = 160 kg Anzeige
160 kg +/- 0,75 kg

-Einstellung der Zwischenwerte. z.B. bei 50 kg und 100 kg sind durch ein verschieben vom Zifferblatt zu erreichen.
Ersteichungsfehlergrenzen nach EN (DIN) 45 501 Eichklasse IIII für

Max 160 kg – Min 5 kg – d = e = 500 g
Belastung 5 kg bis 25 kg Fehler +/- 0,25 kg

Belastung 25 kg bis 50 kg Fehler +/- 0,5 kg
Belastung 50 kg bis 160 kg Fehler +/- 0,75 kg

Prüfung der BMI Skale

-Waage mit 20 kg belasten,
jetzt muss die Teilung vom Farbdruck rot-orange als senkrecht verlaufende Linie im Sichtfenster der BMI Skale zu
sehen sein.

Slope adjustment / Linearity checks

-Load the scale when it is completely assembled, except for the sight glass

-Load the scale to maximum capacity (160 kg) three times and remove the load.

-Set the scale to “0“ using the zero point setting device (1)

-Load the scale with 150 kg and adjust the slope at adjusting core (2) using
adjusting key 15-02-08-204. Attention: The zero point will shift.

-Remove the load and readjust the scale to “0“ .

-Load the scale again. Repeat the procedure, until F = 150 kg 150.0 +/- 0.75 kg is displayed.
Intermediate values can be obtained by moving the dial face.

First calibration tolerances according to EN (DIN) 45 501, accuracy class IIII
max 150 kg – min 5 kg – d = e = 500 g

5 kg to 25 kg load :tolerance +/- 0.25 kg
25 kg to 50 kg load :tolerance +/- 0.5 kg
50 kg to 150 kg load :tolerance +/- 0.75 kg

Checking BMI chart:

Load the scale with 20 kg
Now the splitting of the colour print of the BMI chart in the viewing glass must be seen as a red-orange vertical line.

14.07.05/Reinhold 30-33-01-263

Service Manual Calibration

Span adjustment / linearity check, model 756
Caution: The zero point will shift.

1. Place the full load (160 kg) on the completely assembled scale and remove the load again. Repeat
this two more times.

2. Then place a 160 kg weight on the scale and check the variation.
There are two options for span adjustment.
Fine adjustment as described in section 3.
For larger variations and for linearity adjustment follow the instructions in section 5.

3. Fine adjustment.
Use hex key S3 to release screw (B1) and to adjust adjuster screw (S) on the load lever tongue
(H). When a positive deviation was detected under full load, turn the adjuster screw (S) clockwise.
When a negative deviation was detected, turn the adjuster screw (S) counterclockwise.
One revolution (360°) of the adjuster screw corresponds to 0.4 kg on the dial display.

4. The load lever tongue provides a max. setting range of +/- 4 kg.

If the setting range provided by the load lever tongue is not sufficient, remove the viewing glass,
the
pointer and the dial.

20.09.06/ Sie, Eg, Rei 2 30-33-01-265