JENCO 765 User manual

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OPERATION MANUAL
MODEL 765
THERMOCOUPLE PANEL THERMOMETER
]
JENCO ELECTRONICS, LTD.
MANUFACTURER OF PRECISION INSTRUMENTS

1
GENERAL INTRODUCTION:
The model 765 digital indicating panel thermometer is a high performance industrial
grade readout for types K, J, T, E thermocouple sensors and 3-wire RTD (PT-l 00). The
thermocouple gain, linearization, and cold junction are automatically compensated by
internal electronic circuits.
The temperature scale can be easily changed from to ℉and vice versa by an
internal jumper without re-calibration.
An accurate I mV per display count analog output is provided to interface the
instrument with a recorder, printer, etc.
For rapid changing display, the ''HOLD'' function may be used to freeze the display.
INITIAL INSPECTION:
Carefully unpack the instrument. Inspect damage in shipment. If any damage is found,
notify your JENCO distributor immediately. All packing material should be saved until
satisfactory operation is confirmed.

2
SPECIFICATION :
MODEL TYPE RANGE RESOULTION ACCURACY
765K K -105 to 1372 1 1.5 ,1 digit
-l57℉to 1999℉l℉2.7℉,l digit
765 J -210 to 760 1 1.5 ,1 digit
-346℉to 1400℉l℉2.7℉,1 digit
765T T -105 to 400 1 1.5 ,1 digit
-157℉to 752℉1℉1.5℉,1 digit
765E E -105 to 1000 1 1.5 ,1 digit
-157℉to 1832℉1℉2.7℉,1 digit
765PT PT-100 -50.00 to 199.9 0.1 0.1 ,1 digit
-58℉to 199.9℉0.1℉0.2℉,1 digit
765PTB PT-100 -50 to 850 1 1 , 1 digit
-58℉to 1562℉1℉1℉,1 digit

3
GENERAL :
Analog Output (linearized) 1 mV/count
Analog Output Accuracy +0.2% of reading , +1 mV
(accuracy specified at 23"C, +5'C)
T/C Resistance 100 (min)
Sensor Break indication Positive over range (upscale)
Display 0.56" High efficiency LED
Power 115V AC, 230V AC, ±l0%,50/60 Hz
Dimensions 48mm x 96mm x 110mm

4
MOUNTING PROCEDURE:
1. Make a cutout on any panel, with a thickness of l/l 6 inch (l .5 mm) to 3/8 inch (9.5
mm) Refer to DRAWING 1.
PANEL CUTOUT
DRAWING 1

5
2. Remove the mounting brackets assembly from the panel meter and insert the panel
meter to
PANEL METER WITR MOUNTING BRACKET AND SCREW
DRAWING 2

6
3. Replace the mounting brackets assembly into the panel meter and fasten the
mounting screws to secure the panel meter to the mounting panel. Refer to
DRAWING 3.
MOUNTING METHOD
DRAWING 3

7
ANALOG VOLTAGE OUTPUT:
The analog voltage output can be used to interface with other instruments such as
recorder, printer, remote indicator, 4-20 mA converter, etc.
The following rule must be observe in order to avoid reading inaccuracies or possible
damage to the instrument.
1. If grounded or naked thermocouple is used, the interface device's circuit
common must not be connected to earth ground.
2. The input impedance of the interface device must be greater than 10K
3. Be sure that the AC line voltage is never connected to analog output.
WIRING DIGRAM:
1. Connect the AC line to the rear of instrument. The model 765 can be used with
115V AC or 230V AC, 50/60 Hz. Refer to DRAWING 4 and DRAWING 5.
2. Connect the two thermocouple leads to the rear of instrument and be sure to
observe the correct polarity of thermocouple leads. Refer to DRAWIN 4 and
DRAWING 5.
3. The "HOLD" function is activated by connecting the "HOLD" terminal to
ANALOG GND TERMINAL

8
WIRING DIAGRAM FOR T/C MODEL
DRAWING 4

9
WIRING DIAGRAM FOR RTD MODEL
DRAWING 5

10
TO ℉JUMPER
DRAWING 6

11
WARRANTY
Jenco Instruments, Ltd. Warrants this product to be free from significant deviations in
material and workmanship for a period of 1 year from date of purchase. If repair or
adjustment is necessary and has not been the result of abuse or misuse, within the year
period, please return-freight-prepaid and the correction of the defect will be made
without charge. If you purchased the item from our Jenco distributors and it is under
warranty, please contact them to notify us of the situation. Jenco Service Department
alone will determine if the product problem is due to deviations or customer misuse.
Out-of –warranty products will be repaired on a charge basis.
RETURN OF ITEMS
Authorization must be obtained from one of our representatives before returning items
for any reason. When applying for authorization, please have the model and serial
number handy, including data regarding the reason for return. For your protection,
items must be carefully packed to prevent damage in shipment and insured against
possible damage or loss. Jenco will not be responsible for damage resulting from
careless or insufficient packing. A fee will be charged on all unauthorized returns.

12
NOTE: Jenco Instruments, Inc reserves the right to make improvements in design,
construction, and appearance of our products without notice.
JENCO INSTRUMENTS, INC.
7968 Arjons Drive, Suite C
San Diego, CA 92126 USA
TEL: [phone] FAX: [phone]
E-MAIL: [e-mail]
JENCO ELECTRONICS, LTD.
PO. BOX LINKOU 117
TAIPEI, TAIWAN
TEL: [phone] FAX: [phone]
E-MAIL: [e-mail]
SHANGHAI JENCO ELECTRONICS, LTD.
18 Wang Dong Zhong Road
Sijing Town,Songjiang
SHANGHAI,CHINA
TEL: [phone] FAX: [phone]
E-MAIL: [e-mail]
Homepage:http://www.jenco.com.cn

Artisan Technology Group is your source for quality
new and certied-used/pre-owned equipment
• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
• LEASING/MONTHLY
RENTALS
• ITAR CERTIFIED
SECURE ASSET SOLUTIONS
SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
WE BUY USED EQUIPMENT
Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
www.artisantg.com/WeBuyEquipment
REMOTE INSPECTION
Remotely inspect equipment before purchasing with
our interactive website at www.instraview.com
LOOKING FOR MORE INFORMATION?
Visit us on the web at www.artisantg.com for more
information on price quotations, drivers, technical
specications, manuals, and documentation
Contact us: (888) 88-SOURCE | [e-mail] | www.artisantg.com
SM
View
Instra