INSTRUCTION MANUAL H-767
THERMOMETER for SOLDERING IRON
Thank you for purchasing the HOZAN H-767 THERMOMETER for SOLDERING IRON.
With proper care and handling,this fine instrument will provide years of trouble-freeoperation.Please read this entire instruction manual carefully before attempting to place
this instrument in service.Please keep this instruction manual available for reference.

Identification of parts Displayᴾ

Power switchᴾSensorᴾ

The loaded battery is not warranted in its life since just a testing battery.

Specifications
Measurement range

0 to 500ḥSampling rateSensor

H-768

Power supply

9V Laminated (6F22) battery X 1Resolution

1ḥBattery life

Approx. 100 hours (continuous use)

Accuracyᶠ(1ήrdgὺ1dgt) Outer dimensions 110(W) X 66(H) X 155(D) mmWeight
345g
1999 countMax. readingᾀᴾ

1.25 times/secondWarning and caution symbols



These symbols are used throughout the instruction manual to alert the user to potential
safety hazards as follows :Warning ͐ Notice when incorrect handling could cause the user's death or serious
injury.
Caution ͐ Notice when incorrect handling could cause injury to the user or materialdamage.
Even if the instructions do not have
Caution mark, there are some possibilities for aserious situation. Follow the instructions.

PrecautionsThe H-767 is a thermometer only for soldering irons. Do not use for any other purpose.

Warning
Do not touch the sensor immediately after measuring. Otherwise, this could cause aburn.

Caution
1. Do not press hardly the center of the sensor. The sensor will wear out in ashort period.
2. The measuring range of this instrument is 0㹼500ḥ. Do not use with soldering irons exceeding 500ḥ.
3. Place the instrument on a level and stable place.
4. The H-767 is a precision instrument. Do not drop or apply a strong impact.
This could damage the H-767.
5. While opening the bottom lid, do not touch anything else except the battery holder or the snap connector when replace battery. This could cause a malfunction.

Operation
the instrument on a level and stable place.
ᾀᴾ Place
Turn the power switch on,then the display will show theambient temperature immediately.

sure that the temperature of the soldering iron tip is
ᾁᴾ Makehigh enough melting any solder.

ᾁᴾOperation
place the tip of energized soldering iron on theᾂᴾ Gently
center of the sensor.Note the reading.To improve heattransferfrom the soldering iron tip to the sensor,apply asmall amount of solder.

Caution
Do not apply the iron tip onto the sensor wire excessively force. This could damage the sensor wire.
Weighed 50 to 100g is recommended.

flux builds up on the sensor. Wipe off periodicallyᾃᴾ Solderwith suitable cleaning liquid such as the HOZAN Z-293
FLAX REMOVERor Z-275 FLUX CLEANER.

sensor is a consumable item. If worn out, simply
ᾄᴾ Theremove the sensor as illustrated,and replace it with anew sensor.

Replacement sensor
H-768
(Standard accessory/ for fine iron tip)

H-763Option)

Replacing the battery‫ە‬When "LO BAT" is displayed, replace the battery with new one. Prepare a Phillips
screwdriver no.1. 

ᾀᴾ Turn the power switch off.
the unit upside down. Remove one set screw of the bottom lid, and open theᾁᴾ Turncover.
ᾂᴾ Pull the battery out from the battery holder.ᾃᴾ Set a new battery to the snap connector.ᾄ Close the bottom lid.
ᾂᴾ

Indication of error
If the display shows "1", it indicates an error related to the sensor.
This message is displayed when the sensor is not set or is wornout. If worn out, simply remove the sensor as illustrated,andreplace it with a new sensor.

Calibration
Ask HOZAN dealer for calibration and adjustment. We are able to issue test data,calibration certificates and traceability charts on request.
You can perform calibration (judging if the unit is correct) and adjustment by yourself, but
it is not recommended for precise measuring and we are not able to guarantee its result.
Only calibrating procedures are written as follows.We send a detailed manual foradjustment when requested.

Prepare a standard generator or direct current power supply and a voltmeter forcalibration and adjustment.
Recommended ambient temperature 㸸23ḥor closer
Preparation 㸸Leave the thermometer to be calibrated aswell as the instruments to use for calibration for 30 minutes.‫ە‬

Calibration of standard contact temperature setting

installing the sensor, turn the power on with wiring nothing. After ten minutes
ᾀᴾ Whileof warm-up, make a comparison between displayed temperature and the actual
ambient temperature.
difference is ᶠ2ḥor less, the instrument is correct.ᾁ If theCaution͐
Do not touch the sensor during this work.
We recommend to short-circuit the connect pins removing the sensor.

ᾃᴾCalibration
‫ە‬

CalibrationIn case of using a DC standard generator for testing thermoelectric thermometer ᾀ First, check if the standard contact temperature given above is correct.
Pull out the sensor and wire like below figure. Turn the power of the instrument on. ᾁ Follow
the instructions of the standard generatorregarding its handling.
(TheH-767 has a function of compensating ambient temperature automatically.
Use a proper standard generator with a thermo-probe.)

Sensor socket
Standard generator

ὺᴾThermo-probeὼᴾ

ᾂᴾ Apply voltage corresponding to 400ḥfrom the standard generator.
ό1ᴾ ᴾᴾᴾᴾᴾό2ᴾ

If the instrument displays 401ḥᶠί1ήrdg㸩1dgtὸit is correct.

ᾃᴾό1 1ήrdg͐1ήof displayed value
ό2 1dgt͐a piece of least significant digit

The instrument which is correct at the point of 400ḥ indicates 503ḥ when itᾄ applied
voltage corresponding to 500ḥ. Similarly it indicates 298ḥ when 300ḥ,
199ḥ when 200ḥ and 101ḥ when 100ḥ. This is not unusual, but a result upon
the characteristic that the relation between temperature and thermoelectric power
is not perfectly linear.ᾄᴾCalibration
In case of without using DC standard generator for testing thermoelectric thermometer ᾀ First, check if the standard contact temperature given above is correct.
ᾁ Pull out the sensor and wire like below figure. Turn the power on. DCV generator 

the reading of ambient temperature. ᾂ Note
Refer to the cross-reference tablefor K type thermocouple) to get mV value
from ambient temperature.

the mV value resulting in 3 from theᾃ Subtract
voltage corresponding to 400ḥ in the righttable to get the applying voltage.
Apply it voltage to the circuit and read thedisplay. Ambienttemperature(ḥ)
20
21
22
23
24
25
26

Thermoelectric
power(mV)
0.798
0.838
0.879
0.919
0.960
1.000
1.041

Check
temperature(ḥ)
500
400
300
200
100
0

Thermoelectric
power(mV)

20.640
16.395
12.2078.1374.0950 (Based upon JISC 1602)

ᾄ If the instrument displays 401ḥᶠί1ήrdg㸩1dgtὸit is correct.

ᾅᴾMaintenanceAs extended use, engagement of the sensor and the sensor base could become loose(tight). If so, adjust it as follows:
To be tight, widen the gap of the contact pins on the sensor
base with a Phillips screwdriver and such.

To be loose, narrow the gap of the contact pins on the sensor
base with pliers and such.

1-2-12 Saiwaicho, Naniwa-ku, Osaka 556-0021, Japan
https://www.hozan.co.jp/E/
E-mail：th@hozan.co.jp
23.09

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