HOZAN H-767 User 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-free
operation. Please read this entire instruction manual carefully before attempting to place
this instrument in service. Please keep this instruction manual available for reference.
INSTRUCTION MANUAL
Specifications
0 to 500℃
H-768
1℃
(
1999 count
Measurement range
Sensor
Resolution
Accuracy
Max. reading
1.25 times/second
9V Laminated (6F22) battery X 1
Approx. 100 hours (continuous use)
120(W) X 100(H) X 145(D) mm
657g
Sampling rate
Power supply
Battery life
Outer dimensions
Weight
Identification of parts
Sensor
Power switch
Display
The loaded battery is not warranted in its life since just a testing battery.
１

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 material
damage.
Even if the instructions do not have Caution mark, there are some possibilities for
a serious situation. Follow the instructions.
Precautions
The H-767 is a thermometer only for soldering irons. Do not use for any other purpose.
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～ 500℃. Do not use with soldering
irons exceeding 500℃.
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.
Caution
Do not touch the sensor immediately after measuring. Otherwise, this could cause a
burn.
Warning
２ Make sure that the temperature of the soldering iron tip is
high enough melting any solder.
Operation
１ Place the instrument on a level and stable place.
Turn the power switch on, then the display will show the
ambient temperature immediately.
２

Operation
Solder flux builds up on the sensor. Wipe off periodically
with suitable cleaning liquid such as the HOZAN Z-293
FLAX REMOVER or Z-275 FLUX CLEANER.
４
３ Gently place the tip of energized soldering iron on the
center of the sensor. Note the reading. To improve heat
transfer from the soldering iron tip to the sensor, apply a
small amount of solder.
５ The sensor is a consumable item. If worn out, simply
remove the sensor as illustrated, and replace it with a
new sensor.
Replacement sensor
H-763
(Option)
H-768
(Standard accessory
/ for fine iron tip)
Replacing the battery
● When "LO BAT" is displayed, replace the battery with new one. Prepare a Phillips
screwdriver no. 1.
１ Turn the power switch off.
２ Turn the unit upside down and unscrew at four corners, then remove the bottom lid.
３ Pull the battery out from the battery holder. It is easier to take the battery out by
using left hand to hold the battery a little and pull the ribbon with right hand.
４ Take off the snap connector from the battery. Set a new battery to the snap
connector. Put the battery back to the battery holder with the ribbon between them.
５ Close the bottom lid.
Do not apply the iron tip onto the sensor wire exces-
sively force. This could damage the sensor wire.
Weighed 50 to 100g is recommended.
Caution
３

２ If the difference is ±2℃ or less, the instrument is correct.
 Caution…Do not touch the sensor during this work.
We recommend to short-circuit the connect pins removing the sensor.
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 for
adjustment when requested.
Prepare a standard generator or direct current power supply and a voltmeter for
calibration and adjustment.
：23℃ or closer
：Leave the thermometer to be calibrated as
well as the instruments to use for calibration
for 30 minutes.
Recommended ambient temperature
Preparation
Calibration
１ First, check if the standard contact temperature given above is correct.
２ Pull out the sensor and wire like below figure. Turn the power of the instrument on.
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.)
３ Apply voltage corresponding to 400℃ from the standard generator.
Calibration
In case of using a DC standard generator for testing thermoelectric thermometer
●
１ While installing the sensor, turn the power on with wiring nothing. After ten minutes
of warm-up, make a comparison between displayed temperature and the actual
ambient temperature.
Calibration of standard contact temperature setting
●
Sensor socket
Thermo-probe
＋
－
Standard generator
４

３ Note the reading of ambient temperature.
Refer to the cross-reference table
(for K type thermocouple) to get mV value
from ambient temperature.
Ambient
temperature(℃)
20
21
22
23
24
25
26
Thermoelectric
power(mV)
0.798
0.838
0.879
0.919
0.960
1.000
1.041
In case of without using DC standard generator for testing thermoelectric thermometer
１ First, check if the standard contact temperature given above is correct.
Calibration
５ The instrument which is correct at the point of 400℃indicates 503℃when it
applied voltage corresponding to 500℃. Similarly it indicates 298℃when 300℃,
199℃when 200℃and 101℃when 100℃. This is not unusual, but a result upon
the characteristic that the relation between temperature and thermoelectric power
is not perfectly linear.
(Based upon JIS C 1602)
４ Subtract the mV value resulting in 3from the
voltage corresponding to 400℃in the right
table to get the applying voltage.
Apply it voltage to the circuit and read the
display.
Check
temperature(℃)
500
400
300
200
100
0
Thermoelectric
power(mV)
20.640
16.395
12.207
8.137
4.095
0
５ If the instrument displays 401℃±（1％rdg＋1dgt）,it is correct.
５
４ If the instrument displays 401℃±（1％rdg＋1dgt）,it is correct.
＊1 1％rdg…1％ of displayed value
＊21dgt…a piece of least significant digit
＊1 ＊2
DCV generator
２ Pull out the sensor and wire like below figure. Turn the power on.

18.05
1-2-12 Saiwaicho, Naniwa-ku, Osaka 556-0021, Japan
Tel : [phone] F a x : [phone]
As extended use, engagement of the sensor and the sensor base could become loose
(tight). If so, adjust it as follows:
Maintenance
To be loose, narrow the gap of the contact pins on the sensor
base with pliers and such.
To be tight, widen the gap of the contact pins on the sensor
base with a Phillips screwdriver and such.
６