Seiko DH33A Manual del instalador

PARTS CATALOGUE /TECHNICAL GUIDE

Movement

size

Cal. No.

Item DH33A

Movement

(x 1.0)

Outside diameter

Casing diameter

Height 9.0 mm

ø36.2mm

Display Medium Neumatic Liquid Crystal, FEM (Field Effect Mode)

1/5 Multiplex driving systemLiquid Crystal Driving System

Battery

Lithium battery SEIKO CR2032

Voltage : 3V

Battery life is approximately 3 years

Measuring Gate by Quartz Tester Any gate can be used

Loss/Gain

Regulation System

Monthly rate at normal temperature range: less than 15 seconds

Trimmer condenser

• DIVE PLAN display

•Daily Alarm function

•NITOROX Diving function

•Dive Plan function

•Dive Log function

•Hour Correction function

•Dive function

•Warning Alarm function

• Battery Life indicator

• EL Backlight

•TIME/CALENDAR display

•REGULAR ALARM display

• Dive mode display

•FO

(NITROX) display

• DIVE PLAN display

•HOUR CORRECTION display

•DIVE LOG display

Additional Mechanism

Display System

Cal. DH33A

[SPECIFICATIONS] ( For Movement Replacement )

•The movement parts are not provided.

•The rotation movement code is

UDH3320,which includes the parts 4

to 9 .

PARTS CATALOGUE

Disassembling procedures Fig. : 1 10

Reassembling procedures Fig. : 10 1

Lubricating: Types of oil Oil quantity

Silicone grease 500,000 c.s. Normal quantity

Cal. DH33A

➔

➡Please refer to “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.

1 Case back screw

Piezoelectric element

2Case back

6Module

10 Case

Button C

Button D

Gasket for sensor unit

Sensor

3Case back gasket

4Screws for sensor unit

mounting plate

8Sensor unit clamp

9Sensor unit

Button spring clip

Button A

Button B

Structure of the sensor unit

Sensor ring

Sensor unit

mounting plate

Screws for sensor unit

clamp

TECHNICAL GUIDE Cal. DH33A

I. REMARKS ON BATTERY CHANGE

When changing the battery, follow the procedures below.

1. Remove the comment seal.

*Check where the comment seal was put, as it must be put

back to the same place.

2. Release the battery clamp hooking portion with a pair of

tweezers as illustrated at right.

3. Remove the battery.

1. Set the new battery.

2. Set the hooking portion of the battery clamp firmly.

3. Put the comment seal back where it was originally put.

4. Reset the circuit by pressing down the AC terminal of the

circuit block and the circuit block cover with a pair of conductive

tweezers.

Battery clamp

hooking portion

II. REMARKS ON DISASSEMBLING AND REASSEMBLING

●Remarks on the adhesive

• The case back screw is fixed by using the adhesive.

•Use the “LOCTITE 241” of Loctite Corporation to fix the screws.

•Never use any other adhesive but “LOCTITE 241” in the market place or any joining material for band

adjustable screw (S-312), otherwise it may cause difficulties when unscrewing or poor water

resistance when screws become loose because of some unexpected shocks.

●How to glue and fix the screws

1. Remove water drops, oil contents, dust and dirt from the

screw and screw hole on the case.

2. Apply appropriate amount of the adhesive to a screw as

illustrated at right.

3. Tighten up the screw securely with a torque driver (bit size:

T5).

4. Leave them for approximately 24 hours under normal

temperature so that the adhesive becomes dry enough and

the screws get fixed securely.

1Case Back Screw

•When tightening the screws up, tighten the screw one after

another in diagonal order.

•After tightening up all the screws, retighten all of them once

again to fix them even more securely.

Adheshive

TECHNICAL GUIDE Cal. DH33A

5Sensor unit mounting plate

•Set the sensor unit board to the inductive portion

of the module, on which place the sensor unit

mounting plate. Then screw them up tightly.

89Sensor unit

❖The sensor unit and module are provided in pair with their accuracy pre-adjusted. Therefore,

even in case for a defect of the either one, replace both the sensor unit and module as one

set.

1. Remove dust and dirt from the sensor unit

of the case.

2. Pass the sensor unit board through the

hole of the sensor unit clamp toward the

direction shown in the illustration at right.

(Bend the tip of the sensor unit board while

passing it through the hole.)

Caution

• Never touch the gel portion of the sensor.

3. Set the sensor unit firmly to the set position

of the case.

4. Put the sensor unit clamp into the groove

portion of the case ("A" portion in the

illustration at right), then screw it up

securely.

Sensor unit mounting plate

Module

Gel portion

Bend the sensor unit board

while passing it through the hole.

"A" Portion

Sensor unit clamp

6Module

❖The module and sensor unit are provided in pair with

their accuracy pre-adjusted. Therefore, even in case for

a defect ofthe either one, replace both the module and

sensor unit as one set.

Caution

•Be careful not to damage the sensor unit board.

• Do not touch the trimmer for the accuracy adjustment.

Sensor unit board

Sensor

TECHNICAL GUIDE Cal. DH33A

IV. VALUE CHECKING AND ADJUSTMENT

● Current Consumption

For the whole module (in the WATCH mode) : Less than 2.5 µA (With 3.0 V. supplied from a battery)

1. Remove the lithium battery and connect the tester as illustrated below.

2. With the tester connected to the movement, reset the circuit.

(To reset the circuit, refer to “I. Remarks on Battery Change”.)

3. When stable measurements can be obtained, read the measurement.

● Functional Checks

After replacing module with a new one, Cal.DH33 requires checks for the accuracy of data such as 1: water

depth measurement, 2: pressure index value and 3: temperature measurement . Those checks should be

performed in the TEST mode.

Check if all the segments light up

Check if EL backlight light up

Check temeperature

Check atomospheric pressure value

Close the case back

Go to the TEST mode

▼

In the Atmospheric pressure/Water depth mode, check the

accuracy of water depth measurement and water resistance

Press Button D in the Buzzer mode to return to the

normal TIME/CALENDAR display and set the time.

Check if the buzzer rings

Functional check procedure

★While in the All-Segments-Light-Up mode, if Button D is pressed , EL backlight illuminates the

display for 2 to 3 seconds.

★★ While in the Buzzer mode, if Button C is pressed, the buzzer rings for 5 to 6 seconds, and if Button

D (SET button) is kept pressed for 5 to 6 seconds, the display returns to the normal TIME/

CALENDAR display.

2. Pressure Sensor

●Remarks on atmospheric pressure

Pressure index value is determined by the following calculation.

Pressure index value = Output value from sensor – Offset value

In the case of the display in Illustration 2,

Pressure index value = 1452 – 1281 = 171

so the pressure index value is 171.

In order to calculate the atmospheric pressure out of the pressure index value, the caluculation is

as follows.

Atmospheric pressure (hPa) = ( Pressure index value + 5 ) x 2.5 + 550

In the case of the display in Illustration 2,

Atmospheric pressure (hPa) = ( 171 + 5 ) x 2.5 + 550 = 990 (hPa)

so the atmospheric pressure is 990 hPa.

TECHNICAL GUIDE Cal. DH33A

1. How to set the watch to the TEST mode.

●To show the "TEST mode", reset the circuit while keeping Button A (MODE button) and Button C

(SELECT button) pressed. (See Illustration 1 and 2.) If this is not done properly, the display becomes

blank or return to the normal TIME/CALENDAR display. (To reset the circuit, refer to “I. REMARKS

ON BATTERY CHANGE” on page 3.)

Illustaration 1

Button C

Button A

Offset value

Output value

from sensor

Illustaration2 - Offset

While in the TEST mode, the mode changes as follows with each press of Button A.

All-Segments-

light-up mode

Temperature

mode

Atmospheric pressure/

Water depth mode

Normal Time/Calendar mode

▼

AA A

Press for 5 to 6

seconds

Buzzer mode

★★★

●Remarks on the accuracy of the pressure sensor / Water resistance check

Water depth is preadjusted to measure about 10 m for 400 counts. It is not readjustable.

Apply pressure by water resistance tester and check if the water pressure falls within the range of {(the

current pressure x 1.028) ±3 %}.

3. Temperature check

Check if the temperature falls within ±2 of the current temperature.

4. Adjustment Screws

TECHNICAL GUIDE Cal. DH33A

The table 1 below shows the pressure index value corresponding to the atmospheric pressure. The variance

in the pressure index value is within ±1 count.

[ Table 1 ]

[ Table 2 ]

Altitude rank by pressure

index value

148

116

- 31

147

115

Altitude rank A/D index value

209

208

207

206

205

204

203

202

201

200

199

198

197

196

195

194

193

192

191

190

189

188

187

186

1085

1083

1080

1078

1075

1073

1070

1068

1065

1063

1060

1058

1055

1053

1050

1048

1045

1043

1040

1038

1035

1033

1030

1028

185

184

183

182

181

180

179

178

177

176

175

174

173

172

171

170

169

168

167

166

165

164

163

162

1025

1023

1020

1018

1015

1013

1010

1008

1005

1003

1000

998

995

993

990

988

985

983

980

978

975

973

970

968

161

160

159

158

157

156

155

154

153

152

151

150

149

148

147

146

145

144

143

142

141

140

139

138

965

963

960

958

955

953

950

948

945

943

940

938

935

933

930

928

925

923

920

918

915

913

910

908

pressure index

value

pressure index

value

pressure index

value

atomospheric

pressure (hPa)

atomospheric

pressure (hPa)

atomospheric

pressure (hPa)

❖Do not touch the adjustment screws unless any adjustment is requred.

Illustaration - The back of the module

Temperature adjustment screw

Pressure adjustment screw

Turn the screw clockwise (or counterclockwise) to adjust

temperature towards the minus (or plus) direction.

Turn the screw clockwise (or counterclockwise) to adjust

accuracy towards the loss (or gain) direction.

Turn the screw clockwise (or counterclockwise) to adjust

pressure towards the plus (or minus) direction.

Time Accuracy (loss/gain) adjustment screw

TECHNICAL GUIDE Cal. DH33A

● Time Accuracy

•In order to measure time accuracy, light up all the segments of the

display.

•Any gate of the quartz tester can be used for measurement.

1. Press Button A several times to show the TIME/

CALENDAR mode.

2. Press Button B only once to change the display

to the TIME SETTING mode.

3. While in the TIME SETTING mode, press Button

C first, and while keeping it pressed, push Button

D in to light all the segments of the display.

4. To return to the normal display, press any button.

The watch will return to the TIME/CALENDAR

mode.

Button D

Button B Button C

Button A

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