APPA 51 Digital Thermometer User Manual

APPA 51 Digital Thermometer

Product Introduction

When you receive your Digital Thermometer, ensure that you have the following items:

• Digital Thermometer
• K-type Bead Thermocouple (51 single, 52 a couple)
• Operator’s Manual
• Protective Holster
• Belt Clip

Product Specifications

General specifications:

• Conforms to the temperature/voltage tables of the National
  Bureau of Standards and to the IEC 584 Standards for K-type.

• Display: 3 1/2 digit Liquid Crystal Display (LCD) with a maximum reading of 1999.

• Polarity Indication: Automatic, positive implied, negative indicated.

• Overrange Indication: OL or -OL.

• Low Battery Indication: ” ” is displayed when the battery voltage drops below the operating voltage.

• Sampling Rate: 2.5 times/sec.

Model 51:

• Measurement Range:
• Resolution:
• Accuracy:
• Input Protection: V DC or V rms

Model 52:

• Measurement Range:
• Resolution:
• Accuracy (T1 or T2):
• Accuracy (T1 or T2):
• Input protection: V DC or V rms
• Teflon tape insulated.

Product Operation

This instrument is designed to use an external K-type thermocouple as a temperature sensor. Temperature indication follows National Bureau of Standards and IEC 584 temperature/voltage tables for K-type thermocouples are supplied with thermometer.

WARNING: To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 24V RMS or AC or 60V DC (6Vrms AC or 9VDC for model 52). To avoid damage or burns, do not make temperature measurements in microwave ovens.

Preparation and Caution Before Measurement

1. Before measurement, warm up for at least 30 seconds after connecting the thermocouple to the thermometer.
2. If the instrument is used near noise-generating equipment, be aware that the display may become unstable or indicate large errors.

Product Maintenance

To keep the instrument clean, wipe the case with a damp cloth and detergent, do not use abrasives or solvents. Any adjustment, maintenance, and repair shall be made by a skilled person. To maintain the thermocouple in good condition, observe the following precautions:

• Avoid excess bending.
• Do not overheat the thermocouple.
• Avoid chemical reactions that can damage the thermocouple.

Product Battery Replacement

To replace the battery, follow the steps below:

1. Remove the screw.
2. Remove the battery cover.
3. Replace the 9V battery.
4. Reattach the battery cover and screw.

How to Use the Tilt Stand and Holster

You can either swing out the stand for easier meter reading or hang the digital thermometer on a nail at the workbench.

INTRODUCTION

Unpacking and Inspection
Upon removing your new Digital Thermometer from its packing, you should have the following items:

1. Digital Thermometer.
2. K-type Bead Thermocouple. (51 single, 52 a couple)
3. Operator’s Manual.
4. Protective Holster.
5. Belt Clip.

Front Panel

Refer to Figure 1 and the following numbered steps to familiarize yourself with the meter’s front panel controls and connectors.

1. Digital Display: The digital display has a 3-1/2 digit LCD readout (maximum reading 1999) auto polarity decimal point, function symbols, and unit annunciators.
2. Thermocouple Input Connectors: This is used to connect the thermocouple.
3. Hold Switch: This key is used to hold the numeric reading. When pressed the HOLD annunciator is displayed. Conversions are made but the reading is not updated.
4. Power ON/OFF Switch: This key turns the thermometer on or off.
5. Resolution Selector: This key is used to select a resolution of 0.1 or 1.
6. °C / °F Selector: This key is used to exchange the ° C and ° F.
7. Max. Switch: Pressing this key picks up the max reading in measurements, press again to cancel. Disable this function before changing control keys to keep reading correctly.
8. T1-T2 Switch: This key is used to select the T1-T2 mode for measuring (52 only).
9. T2 Switch: This key is used to select the T2 mode for measuring (52 only).
10. T1 Switch: This key is used to select the T1 mode for measuring (52 only).

SPECIFICATIONS

General Specifications
This Thermometer conforms to the temperature/voltage tables of the National Bureau of Standards and to the IEC 584 Standards for K-type.

• Display : 3 1/2 digit Liquid Crystal Display (LCD) with a maximum reading of 1999.
• Polarity Indication: Automatic, positive implied, negative indicated.
• Overrange Indication: “OL” or “-OL”
• Low Battery Indication: ” ” is displayed when the battery voltage drops below the operating voltage.
• Sampling Rate ：2.5 time/sec.

Environmental Conditions

• Operating Temperature : 0°C to 50°C, 0 to 75% RH.
• Storage Temperature: -20°C to 60°C, 0 to 80% R.H. with the battery removed from the meter.
• Temperature Coefficient : 0.15 x (Specified accuracy) / °C, < 18°C or > 28°C.
• Power Requirements: Standard 9V battery, NADA 1604 JIS 006P, IEC6F22 size.
• Battery Life: Alkaline 250 hours.
• Dimensions (H x W x D): 160mm x 64mm x 26mm without a holster. 170mm x 74mm x 39mm with holster.
• Weight (including battery): 300 gms without a holster. 430 gms with holster.
• Accessories: 2 K-type bead thermocouples (52), 1 K-type bead thermocouple (51) battery (installed), operator’s manual, and protective holster.

Electrical Specifications

1. Accuracy is ± (% reading + the number of digits) at 23°C ± 5°C less than 75% R.H for the thermometer.

MODEL: 51

MODEL: 52

Input protection : 9V DC or 6V rms

Thermocouple Characteristics

• K-type thermocouple.

50BK bead thermocouple

1. Temperature Range : -40°C ~ 204°C (-40°F ~ 399.2°F)
2. Tolerances : ± (2.2°C or 0.75%) from 0°C to 204°C ± (2.2°C or 2.0%) from 0°C to -40°C
3. Wire Length: 1m, with miniature plug. Teflon tape insulated.

OPERATION

This instrument is designed to use an external K-type thermocouple as a temperature sensor. Temperature indication follows National Bureau of Standards and IEC 584 temperature/voltage tables for K-type thermocouples supplied with thermometers.

WARNING
TO AVOID ELECTRICAL SHOCK, DO NOT USE THIS INSTRUMENT WHEN VOLTAGES AT THE MEASUREMENT SURFACE EXCEED 24V RMS OR AC, OR 60V DC. (6Vrms AC OR 9VDC FOR 52) TO AVOID DAMAGE OR BURNS, DO NOT MAKE TEMPERATURE MEASUREMENTS IN MICROWAVE OVENS.

Preparation and Caution Before Measurement

1. Before measurement, warm up for at least 30 seconds, after connecting the thermocouple to the thermometer.
2. If the instrument is used near noise-generating equipment, be aware that the display may become unstable or indicate large errors.

Temperature Measurements

1. Connect the plug of the thermocouple to the connector of the thermometer.
2. Select the desired input mode, resolution, and °C/°F.
3. Use the sensing point of the thermocouple to measure the surface to be measured.
4. Read the stable reading.
5. Warning: Do not measure the surface of the potential exceeds 60 Vd.c. or 24 Vr.m.s.”

MAINTENANCE

To keep the instrument clean, wipe the case with a damp cloth and detergent, do not use abrasives or solvents. Any adjustment, maintenance, and repair shall be made by a skilled person. To maintain the thermocouple in good condition, observe the following precautions:

• Avoid excess bending.
• Do not overheat the thermocouple.
• Avoid chemical reactions that can damage the thermocouple.

BATTERY REPLACEMENT

The meter is powered by a single 9V battery. Refer to Figure 2 and use the following procedure to replace the battery:

1. Turn the meter off. Remove the thermocouple connector.
2. Remove the holster.
3. Position the meter face down. Remove the screw from the battery cover.
4. Remove the battery cover.
5. Lift the battery from the case top, and carefully disconnect the battery from the battery connector leads.
6. Install a new battery.
7. Replace the battery cover. Reinstall the screw and replace the holster.

BATTERY REPLACEMENT

HOW TO USE THE TILT STAND AND HOLSTER

• Swing the stand out for easier meter reading.
• Hang on a nail at the workbench.

Limited Warranty

This meter is warranted to the original purchaser against defects in material and workmanship for 3 years from the date of purchase. During this warranty period, Manufacturer will, at its option, replace or repair the defective unit, subject to verification of the defect or malfunction. This warranty does not cover fuses, disposable batteries, or damage from abuse, neglect, accident, unauthorized repair, alteration, contamination, or abnormal conditions of operation or handling. Any implied warranties arising out of the sale of this product, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited to the above. The manufacturer shall not be liable for loss of use of the instrument or other incidental or consequential damages, expenses, or economic loss, or for any claim or claims for such laws vary, so the above limitations or exclusions may not apply to you.

APAC

• MGL APPA Corporation  cs.apac@mgl-intl.com.
• Flat 4-1, 4/F, No. 35,
• Section 3 Minquan East Road,
• Taipei, Taiwan
• Tel: +886 2-2508-0877. www.appatech.com.

References

• APPA

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