Anritsu HR-1650 User manual

Handheld Thermometer
Instruction Manual
HR-1650 / HR-1750
AE-100291
Second edition (Sep 2022)
Anritsu Meter Co., Ltd.
2-4-5, Shimomeguro, Meguro-ku, Tokyo, 153-0064, Japan
TEL: [phone]
FAX: [phone]

To safely operate and service the thermometer and to prevent any product
damage and/or maintain the precise temperature measurement results, please
carefully follow the instructions below:
 Do not use this product for any purpose other than taking temperature
measurements.
 If any abnormalities are found, immediately stop using the product.
 Do not disassemble or modify the product.
 Do not use any power supply other than commercially available dry batteries
and/or a dedicated adaptor.
 Insert the batteries in the correct manner (pole+ to pole+).
 Remove the batteries when depleted or when the product is not expected to be
used for an extended period of time.
 Do not mix old and new batteries or batteries of different makes or types.
● Do not throw into an open fire. Do not short circuit, disassemble, or heat.
● Do not recharge the batteries at any time.
● Use specified type batteries.
● To prevent electric shock, do not touch the metal parts or terminals of the probe cable
or output cable during measurement.
● To prevent electric shock, if the probe is still in contact with the voltage application part
even when the power is turned off, disconnect the probe before setting the output
cable or device.
※ When measuring under the influence of high voltage and high frequency, there is a risk
of electric shock and measurement failure, so please contact us.
Safety information
Caution
Warning

Introduction
Thank you very much for purchasing this Anritsu Meter product.
This instruction manual has been carefully prepared to ensure that the product can be
used safely and securely.
Please carefully and thoroughly read this instruction manual, fully understand all the
individual functions, and use the product properly.
Should you have any unclear issues or questions while operating the product, please
refer to this instruction manual.
Notes
 The contents of this document and/or product specifications are subject to change
without prior notice.
 Unauthorized reproduction of any part of this document is strictly prohibited.
 This instruction manual has been prepared with absolute care. Please free feel to
contact our company or your retailer should you discover any omissions or
mistakes.
 In no event is Anritsu Meter liable to anyone for any indirect, special, or
consequential damages as a result of using this product.
Warranty and After-sales Service
 Warranty
This product has been submitted to strict tests and inspections prior to delivery. Anritsu
Meter warrants this product to be free from defects in material and workmanship for a
period of one (1) year from date of delivery. Should any failures arise due to defects
during manufacture or accidents during transportation, please contact our company or
your retailer. For any failures during the warranty period which are deemed our
responsibility, we will exchange the necessary parts or carry out repairs at no cost.
However, the warranty will be considered to be voided (i.e., the customer pays for
repairs) in the following cases:
- Failure due to a fire, earthquake, or any other force majeure.

- Failure due to misuse, abuse, and/or modification. (Please note that if the case of the
product is opened or the screws are loosened, such an act will be regarded as a
modification.)
Note: Our thermocouple probes are consumables and are not covered by the warranty.
 After-sales Service
- If you think the product is not correctly working, please refer to this instruction manual.
Should any issue persist, please contact our company or your retailer.
- Repairs during the warranty period are subject to the content of the warranty sheet.
However, only when used in Japan. Repairs after the warranty period has elapsed will
be carried out only if such repairs recover and maintain the product functions.
- If there is a need to return the product for repair or calibration, please pack it in the
original packaging that was used for delivery. If such packaging is not available, please
enclose the product with sufficient cushioning material and return the product in a
condition where no damage can be caused.

Table of Contents
1. General .............................................................................................. 1
2. Unpacking .......................................................................................... 1
2.1. Unpacking ................................................................................................... 1
2.2. Repacking ................................................................................................... 1
3. Name and Explanation of Each Part ................................................. 2
3.1. External View ............................................................................................. 2
3.2. LCD Display ............................................................................................... 3
4. Preparations Before Taking Measurements ...................................... 4
4.1. How to Install the Batteries ....................................................................... 4
4.2. How to Use the Hand Strap ....................................................................... 4
4.3. How to Set the Probe .................................................................................. 5
4.4. How to Use the Soft Case ........................................................................... 5
5. Operations and Functions ................................................................. 6
5.1. Power ON/OFF ........................................................................................... 7
5.2. HOLD Function .......................................................................................... 7
5.3. Automatic Power OFF Function ................................................................ 8
5.4. Resolution Change [Applicable Models: HR-1750] .................................... 9
5.5. P/V Hold Function [Applicable Models: HR-1750]................................... 10
5.6. Turning the Backlight ON/OFF [Applicable Models: HR-1750] ............. 10
5.7. °C/°F Switch ......................................................................................... 11
6. Retention of Setup Data .................................................................. 12
7. Checking the Remaining Battery .................................................... 12
8. Error Messages ................................................................................ 13
8.1. Indication of a Broken Element of the Probe ........................................... 13
8.2. Overrange Indication ............................................................................... 13
8.3. Battery Voltage Drop Indication .............................................................. 13
9. Maintenance .................................................................................... 14
9.1. Storage ...................................................................................................... 14
9.2. When the Case of the Instrument Gets Dirty .......................................... 14
10. Troubleshooting: Before Contacting Support .................................. 15
11. HR Series Specifications .................................................................. 16

1
1. General
This product is a handheld thermometer for high precision, reliability, and
usability. It has a high-precision analog technology and a microcomputer to
digitally correct measured data, making highly stable and high-precision
temperature measuring possible.
2. Unpacking
2.1. Unpacking
Please check if the following items are present when unpacking. We make sure
all items are carefully packed, but should you find any missing or failed items,
please contact our company or your retailer.
Item Q’ty
Main unit 1
Soft case 1
Hand strap 1
Alkaline AA battery 4
Instruction manual 1
Test report 1
Warranty sheet 1
User registration sheet 1
2.2. Repacking
To move this instrument (such as transportation by car), pack it in its original
packaging. If such packaging is not available, fully protect the instrument with
shock-absorbing material (Styrofoam, etc.). Please note that if packing
materials generate dust or moisture, the instrument may become damaged.
Please use dry packing materials that do not generate dust.

2
3. Name and Explanation of Each Part
3.1. External View
(HR-1750)
① Probe input connector
② LCD display
③ Key switch panel
④ Battery housing
⑤ Hand strap

3
3.2. LCD Display
Description
HR-1650 HR-1750
① HOLD segment ● ●
② A-OFF segment ● ●
③ Battery segment ● ●
④ Main display ● ●
⑤ ﾟF segment ● ●
⑥ °C segment ● ●
⑦ P segment ●
⑧ V segment ●
⑨ Sub display 1 ●
⑩ Sub display 2 ●
①
④
⑦
③
⑨ ⑩
⑥
⑤
⑧
②

4
4. Preparations Before Taking Measurements
4.1. How to Install the Batteries
Make sure to turn the power off when replacing batteries.
Note: To maintain the waterproofing performance, firmly tighten the screws on
the battery cover.
Applicable models: HR-1650/HR-1750
4.2. How to Use the Hand Strap
Place the enclosed hand strap on your wrist to prevent the instrument from
dropping.
Loop the thin cord of the strap through the hole and then pull the other end of
the hand strap through that loop.
(1) Loosen both
screws and
open the cover
of the battery
housing.
(2) Pay attention
to the
orientation of
the batteries.
(3) Install the
batteries.
(4) Reattach the battery
housing cover, tighten
both screws, and then
press the edge of the
cover to secure it.

5
4.3. How to Set the Probe
Set the probe to the main unit as shown in the illustration below. It is designed
so that if the probe orientation is incorrect, it cannot be fully inserted. If the
probe is forcefully inserted, failure may result. Please check the probe’s
orientation before inserting it.
[HR-1*50]
4.4. How to Use the Soft Case
To protect the instrument from dirt or scratches, etc., use the attached soft
case.

6
5. Operations and Functions
This instruction manual covers the HR-1650 Series, and the HR-1750 Series.
Depending on the model purchased, some functions may not be available.
Please refer to the table below.
Table of functions supported by individual series
Function
HR-1650 HR-1750
Power ON/OFF ● ●
Hold ● ●
Automatic power OFF ● ●
Resolution change ●
P/V hold ●
Backlight ●
Waterproofing function
(equivalent to IPX5) ● ●

7
5.1. Power ON/OFF
Pressing the POWER key will illuminate all the indicators
for about three seconds and start the measurements.
Press the POWER key again to turn the instrument off.
All illuminated (HR-1750) Normal measurement
5.2. HOLD Function
Press the HOLD key to maintain the indicated values during measurements.
HOLD will illuminate on the screen while HOLD is on. To release the HOLD
function, press the HOLD key again.
HOLD illuminated

8
5.3. Automatic Power OFF Function
When the AUTO OFF key is pressed, “AUTO OFF” symbol will illuminate on the
screen. If no key operation is performed for a certain period of time (about five
minutes), the power will automatically be turned off, preventing the unit from
remaining turned on. To release the Automatic Power OFF function, press the
AUTO OFF key again.
“AUTO OFF” symbol illuminates

9
5.4. Resolution Change [Applicable Models: HR-1750]
Press the RESO key to switch the resolution.
 0.1°C resolution indication: A range between -104.9
and 504.9°C is displayed with a 0.1°C resolution. If a
temperature is out of this range, the instrument will
automatically indicate it at a 1°C resolution.
 1°C resolution indication: The 1°C resolution is applied
to all temperatures.
0.1°C resolution indication 1°C resolution indication
0.1 ﾟF resolution indication 1ﾟF resolution indication
RESO
RESO

10
5.5. P/V Hold Function [Applicable Models: HR-1750]
Press the P/V-HOLD key to enter the P/V Hold function.
The lowest and highest values will be displayed in the
sub-screens. Press the P/V-HOLD again to return to
normal measurements.
Normal measurement P/V mode
5.6. Turning the Backlight ON/OFF [Applicable Models: HR-
1750]
Press the ☀ key to turn on the backlight so that
indications on the screen can be seen in dark places.
Press the ☀ key again to turn off the backlight.
Note: When the backlight is ON, more battery usage will
be incurred. Don’t forget to turn it off.
Max.
value
Min.
value
Current
temperature
P/V-HOLD

11
5.7. °C/°F Switch
Press the °C/°F key to switch temperature units
(Celsius/Fahrenheit).
Celsius indication Fahrenheit indication
°C/°F

12
6. Retention of Setup Data
Some settings will be released when the batteries are exchanged or when the
instrument is turned off. Please check the details in the following table:
Function
HOLD Released
Automatic power OFF Retained
P/V hold Released
Resolution/Analog output rate Retained
Backlight Released
7. Checking the Remaining Battery
Remaining battery is displayed in the top right corner of the indication.
As properties vary, depending on batteries, use this value only as a reference.
Indicator
When the indication of the indicator becomes ,replace the batteries with
new ones.
Remaining battery
indication
FULL

13
8. Error Messages
8.1. Indication of a Broken Element of the Probe
If the probe has a broken element or is disconnected,
the burnout (broken element) indication is displayed.
If this indication is displayed, replace the probe with a
new one or connect the probe.
8.2. Overrange Indication
When the temperature in measurement exceeds the
measurable range, the overrange indication is
displayed.
If the element of the probe is about to become broken,
this overrange indication may be shown. If it is clear
that the temperature in measurement is within the
measurable range, check the probe.
Even if the overrange indication is shown, it will not
damage the instrument. However, the probe may be
consumed, so relocate it to a place where the
temperature is at a heat-resistant temperature or a
lower temperature.
8.3. Battery Voltage Drop Indication
When batteries are depleted and the battery
indication on the screen becomes , replace the
batteries with new ones.

14
9. Maintenance
9.1. Storage
When storing the instrument, avoid the following places:
- In direct sunlight
- Subject to heavy vibrations
- High humidity (85%RH or more)
- High temperature atmosphere (50°C or higher)
- Filled with dust, waste, corrosive gas, and/or salt
- High electromagnetic field
To store the instrument for a long time, it is recommended to remove the
batteries and store the unit in the original packaging at time of delivery.
9.2. When the Case of the Instrument Gets Dirty
When the case of the instrument gets dirty, please wipe it with a slightly damp
cloth. Do not use alcohol, thinner, benzine, or other chemicals. Otherwise, the
case or keyboard may become discolored or deformed.
* About waterproofing [Applicable models: HR-1650/HR-1750]
The simple water resistance specifications of this product are equivalent to
IPX5. It can be washed with a small amount of water. However, do not directly
spray water on the air hole near the battery housing.
Air hole