HoldPeak 981C User Manual

Non-contact infrared thermometer
981C
Instruction manual
1、Introduction
Compact, rugged and easy to use. Just aim and push the
button, read current surface temperatures in less than a
second. Safely measure surface temperatures of hot,
hazardous or hard-to-reach objects without contact.
How it works
Infrared thermometer measures the surface temperature of
an object. The unit’s optics sense emitted, reflected, and
transmitted energy which is collect and focused onto a
detector. The unit’s electronics transmitted energy which
is display on the unit. For increased ease and accuracy the
laser pointer makes aiming even more precise.
Cautions
Infrared thermometer should be protected for the
following:
--EMF(electro-magnetic fields) from arc welders,
induction heaters.
--Thermal shock(cause by large or abrupt ambient
temperature changes allow 1 hours for unit to stabilize
before use).
--Do not leave the unit on or near objects of high
temperature.
Warning
Do not point laser at eye or indirectly off reflective
surfaces.
1. When take measurement, point thermometer toward
the object to be measured and hold the yellow trigger.
The object under test should be large than the spot
size calculated by the field of view diagram.
2. Distance ＆ spot size: As the distance from the
object increase, the spot size of measuring area
becomes large.
3. Field of view: Make sure the target is larger than the
unit’s spot size. The smaller the target the close
measure distance. When accuracy is critical, make
sure the target is at least twice as large as the spot
size.
4. Emissivity: Most organic materials and painted or
oxidized surfaces have an emissivity of 0.95.
Inaccurate readings will result from measuring shiny
or polished metal surfaces. To compensate, cover the
surface to be measured with masking tape or flat
black paint. Measure the tape or painted surface when
the tape or painted reach the same temperature as the
material underneath.
2、Quick start instruction
1. Press battery door clip, install battery correctly. Pull
the trigger, LCD display reading ＆ battery icon.
Release the trigger and the reading will hold for 7
seconds
LCD display:
A LCD display B MAX
C Low temperature warning setting D Average
E High temperature warning setting F Emissivity
G MIN H Storage date NO.
I Low battery indication J Laser Light
K High temperature warning L Measure data
M Low temperature warning
N Temperature Unit O Date HOLD
2. Locating a hot spot aim the thermometer outside the
(Figure 3)
(Figure 1)
(Figure 2)

HoldPeak 981C Specifications

General

Type	Infrared Thermometer
Resolution	0.1°C/0.1°F
Display	LCD with Backlight
Power Supply	9V Battery
Distance to Spot Ratio	12:1
Response Time	500 ms
Laser Pointer	Yes
Data Hold	Yes
Accuracy	±1.5% or ±1.5°C
Emissivity	Adjustable (0.10 to 1.00)
Spectral Response	8-14 µm

Summary

Introduction to Non-Contact Infrared Thermometer

How the Infrared Thermometer Works

Explains the optical sensing, energy collection, and display process for temperature measurement.

Operational Cautions

Lists critical precautions for operating the thermometer, including EMF and thermal shock avoidance.

Laser Pointer Safety Warning

Emphasizes the crucial warning against pointing the laser at eyes or reflective surfaces.

Quick Start Guide for Thermometer Use

Understanding Distance and Spot Size

Details the relationship between the distance to an object and the size of the measurement area.

Field of View for Accurate Measurement

Guides on ensuring the target size is adequate relative to the spot size for accurate readings.

Emissivity and Surface Compensation

Explains emissivity values and methods to compensate for shiny or oxidized surfaces.

Locating Hot Spots in an Area

Instructions on how to scan an area to identify the hottest spot using the thermometer.

Diagram Description and Controls

Trigger and Power Operation

Details the function of the trigger for powering on, reading, and auto data hold.

Laser Light and Function Buttons

Explains the operation of the laser light button and its dual function as an UP button.

Backlight and Navigation Buttons

Describes the backlight button and its dual function as a DOWN button for settings.

Measurement Mode Selection

Details how to cycle through measurement modes like MAX, MIN, AVG, HAL, and LAL.

Data Storage and Retrieval

Explains the MEM button for reading stored measurement data, with a limit of 12 entries.

Temperature Unit Conversion

How to switch between Celsius (°C) and Fahrenheit (°F) temperature units.

Maintenance and Specifications

Cleaning Procedures for Lens and Case

Provides instructions for cleaning the lens with compressed air and the case with mild soap.

Battery Storage Recommendation

Advises removing the battery when the unit is not used for an extended period.

Technical Specifications Overview

Lists key technical details including temperature range, accuracy, response time, and power.

Applicable Emissivity Table

A reference table listing emissivity values for various common materials.