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RKC INSTRUMENT DP-350 - User Manual

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®
RKC INSTRUMENT INC.
A
ll Rights Reserved, Copyright 1997, RKC INSTRUMENT INC.
Handy Thermometer
DP-350
Instruction Manual
IM350DP01-E4
Thank you for purchasing this RKC product. In order to achieve
maximum performance and ensure proper operation of your new
instrument, carefully read all the instructions in this manual. Please
place the manual in a convenient location for easy reference.
Never use this product for medical equipment.
This instrument must be used in accordance with the
specifications to prevent fire or damage to
instrument and equipment.
This instrument is not intended for use in locations
subject to flammable or explosive gases.
If any abnormality such as smoke, smell of burning
or noise was found, do not use the product. If so, fire
may occur.
RKC is not responsible if this instrument is repaired,
modified or disassembled by other than
factory-approved personnel. Malfunction can occur
and warranty is void under these conditions.
This product is intended for use with industrial machines, test
and measuring equipment. (It is not designed for use with
medical equipment and nuclear energy.)
All precautions described in this manual should be taken to
avoid damage to the instrument or equipment.
Prevent metal fragments or lead wire scraps from falling inside
instrument case to avoid electric shock, fire or malfunction.
Do not drop nor apply strong impact to the product. If so,
failure may result.
Do not use the product while the battery cover is being
removed. If so, failure may result.
Load a battery so that its polarity will meet the indication on
the product. If not, the battery electrolyte may leak or heat be
generated to result in injury or failure.
If the product is not used for a long period of time, remove the
battery from the mainframe. If not, the battery electrolyte may
leak to result in failure.
Battery service life may change depending on battery
performance, operating condition and measuring environment.
Use this product within the following ambient temperature and
ambient humidity.
Allowable ambient temperature: 0 to 50 °C (32 to 122 °F)
Allowable ambient humidity: 45 to 85 %RH (Non condensing)
Do not use or store the product in places such as listed below:
Rapid changes in ambient temperature which may cause
condensation.
Corrosive or inflammable gases.
Direct vibration or shock to the mainframe.
Direct water, oil, chemicals, vapor or steam splashes.
Excessive dust, salt or iron particles.
Excessive induction noise, static electricity, magnetic fields or
noise.
Direct air flow from an air conditioner.
Exposure to direct sunlight.
Excessive heat accumulation.
Turn off the power supply before cleaning the instrument.
Do not use a volatile solvent such as paint thinner to clean the
instrument. Deformation or discoloration will occur. Use a soft,
dry cloth to remove stains from the instrument.
To avoid damage to instrument display, do not rub with an
abrasive material or push front panel with a hard object.
NOTICE
The figures, diagrams and numeric values used in this manual
are only for purpose of illustration.
RKC is not responsible for any damage or injury that is caused
as a result of using this instrument, instrument failure or
indirect damage.
RKC is not responsible for any damage and/or injury resulting
from the use of instruments made by imitating this instrument.
Periodic maintenance is required for safe and proper operation
of this instrument. Some components have a limited service
life, or characteristics that change over time.
Every effort has been made to ensure accuracy of all
information contained herein. RKC makes no warranty
expressed or implied, with respect to the accuracy of the
information. The information in this manual is subject to
change without prior notice.
No portion of this document may be reprinted, modified,
copied, transmitted, digitized, stored, processed or retrieved
through any mechanical, electronic, optical or other means
without prior written approval from RKC.
1. PRODUCT CHECK
Model code
Model code Accessory (Optional)
DP-350CA
No optional
DP-350CA-1
With anti-shock cover (Silicon jacket) *
1
DP-350CA-2
With simple waterproof cover *
2
[Available soon]
DP-350CA-3
With soft case *
* Purchase of each cover only is available. Refer to the following part
numbers:
350P-K01: Anti-shock cover (Silicon jacket)
350P-K02: Simple waterproof cover [Available soon]
350P-K03: Soft case
1
Anti-shock performance:
Free fall up to 80 cm (with the optional cover fitted)
2
Waterproof/dustproof performance:
Protection class close to IP54 (IEC60529) with the optional cover fitted.
[Sensor connecting part is excluded]
Accessories
2. PARTS DESCRIPTION
Mainframe
Connector for
sensor connection
HOLD key
Operation of various
hold functions
User setting mode
setting screen
selection
POWER key
Power ON/OFF
User setting mode
setting item
selection
Battery cover
Display screen
HOLD
POWER
!
WARNING
CAUTION
DP-350 Instruction Manual (IM350DP01-E4) ........................ 1
A
lkaline batteries (LR6) [AA].................................................. 2
Hand strap ............................................................................. 1
Optional (Purchase of the covers only is available):
Anti-shock cover (For
DP-350CA-1)
Simple waterproof cover (For
DP-350CA-2)
Soft case (For
DP-350CA-3)

Questions and Answers

  • C
    coxrobinJul 30, 2025
    Why is the measured temperature display abnormal on my RKC INSTRUMENT DP-350 Thermometer?
    • A
      Alexander DixonJul 30, 2025
      If the measured temperature display on your RKC INSTRUMENT Thermometer is abnormal, there could be several reasons: * The batteries may be low; try changing both batteries at the same time. * A noise source might be interfering with the instrument; separate the noise source from the thermometer. * The wrong sensor might be in use; ensure you are using the specified sensor. * The sensor insertion depth might be insufficient; check if the sensor is loosely inserted and, if so, fully insert it. * The sensor insertion position may be incorrect; insert the sensor at the specified location.
  • N
    Nicole FloydAug 3, 2025
    What to do if my RKC INSTRUMENT DP-350 has no power and no display appears?
    • J
      janewagnerAug 3, 2025
      If your RKC INSTRUMENT Thermometer is not turning on and no display appears, it could be due to the following reasons: * No battery is loaded. Solution: Load a battery. * The battery with less service life is used. Solution: Change both batteries at the same time.
  • J
    James JohnsonAug 8, 2025
    How to fix a frozen display on an RKC INSTRUMENT DP-350 that is not responding to key operations?
    • C
      Christine SpencerAug 8, 2025
      If the display on your RKC INSTRUMENT Thermometer isn't changing and no key operations are accepted, it could be due to a CPU overrun. To resolve this: 1. Keep the thermometer away from any noise generation sources. 2. Remove the batteries. 3. Load new batteries after waiting for more than 10 seconds. 4. Press the POWER key to turn on the power. If the thermometer still doesn't operate normally after these steps, further assistance is needed.
  • H
    Holly RaymondAug 12, 2025
    What does error 'B.O' flashing mean on my RKC INSTRUMENT DP-350 Thermometer and how to fix it?
    • J
      Jason JonesAug 12, 2025
      If your RKC INSTRUMENT Thermometer displays a flashing 'B.O' error, it indicates that the sensor is either broken or not properly connected. To solve this, check the connection of the sensor and make sure that neither the sensor nor its wire is damaged.
  • S
    Susan LopezAug 16, 2025
    What does error 'E 1 °C' mean on my RKC INSTRUMENT DP-350 Thermometer?
    • M
      mitchellamandaAug 16, 2025
      If your RKC INSTRUMENT Thermometer displays an 'E 1 °C' error, it means the adjusted data range is abnormal. Try turning the instrument OFF and then restarting it, or remove and re-insert the batteries before restarting. If the error persists after restarting, the instrument may need to be repaired or replaced.
  • B
    Bridget Lee MDAug 20, 2025
    What does error 'BAT' mean on my RKC INSTRUMENT DP-350 Thermometer and how to fix it?
    • M
      Maria HolderAug 20, 2025
      If your RKC INSTRUMENT Thermometer displays a 'BAT' error, change both batteries at the same time.
  • P
    peter75Aug 25, 2025
    What does error 'ooo °C' mean on my RKC INSTRUMENT Thermometer and how to resolve it?
    • D
      Donald CummingsAug 25, 2025
      If your RKC INSTRUMENT Thermometer displays 'ooo °C', check the sensor connection and confirm that the sensor or wire is not broken.

Summary

Product Check and Accessories

Model Code and Accessory Options

Lists available model codes and their corresponding optional accessories for the thermometer.

Included and Optional Accessories

Details the accessories that come with the product and those available for separate purchase.

Mainframe Parts Description

Mainframe Component Identification

Identifies and describes the main components of the thermometer's mainframe unit.

Preparation Before Operation

Loading Batteries and Connecting Sensor

Instructions for properly loading batteries and connecting the temperature sensor.

Power ON;OFF Procedure

Step-by-step guide on how to turn the thermometer on and off.

Thermometer Operation Modes

Measured Value Display Mode

Explains the display of measured temperature values and units.

Hold and Advanced Hold Functions

Details how to use the hold function to freeze measured values.

Peak and Bottom Hold Functions

Describes functions to track and display maximum or minimum measured values.

User Setting Mode Configuration

Guide to entering and configuring various settings like display units and auto power off.

Troubleshooting Common Issues

Error Displays and Solutions

Lists error codes displayed by the instrument and their corresponding solutions.

Self-Diagnostic Error Codes

Details internal self-diagnostic error codes and their meanings.

Problem and Solution Guide

Provides common operational problems and their recommended solutions.

Technical Specifications

Binding the Hand Strap

RKC INSTRUMENT DP-350 Specifications

General IconGeneral
BrandRKC INSTRUMENT
ModelDP-350
CategoryThermometer
LanguageEnglish