Minco TI408 Operating Instructions

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TI408

8-Channel Handheld Temperature Indicator

Operating Instructions

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Description

Model TI408 is a handheld temperature indicator that accepts up to eight 2-wire temperature
sensors. The indicator utilizes ultra-high precision components and a microprocessor to
achieve a system accuracy of less than 0.2°C over a specified range. The indicator is factory
calibrated at five temperature points to achieve this high accuracy. Through an integrated
calibration menu, the user can re-calibrate the device and adjust a temperature offset to
account for variations in sensor lead-length, contact resistance, and/or sensor tolerance.

Specifications

Display:

2 line, 3 ½ digit LCD (Liquid Crystal Display)

Indicating Range:

-40.0°C to 160.0°C

Sensing Elements:

1000W platinum RTD (TCR = .0385 W/W/°C, 1000 W @ 0°C) per
channel

Sensor Input:

Indication of up to 8 RTD’s.

Temperature Effect:

±0.001°C/°C from 10°C to 60°C

Operating Temperature:

10°C to 60°C.

Storage Temperature:

-20°C to 65°C, non-condensing.

Supply voltage:

Two AA alkaline batteries (supplied)

System Accuracy:

±0.2°C from 120°C to 135°C (when matched to RTD’s)

Adjustments:

Channel offset calibration accessible through calibration menu.

Enclosure:

Black ABS plastic.

Weight:

5.7oz. (161g).

Standby Current (typical):

60 uA.

Operating Current

(typical):

2.8 mA.

Stability Indication:

Variation of less than 0.5°C for 10 seconds over all channels.

Sensor Connection

Input Connection Diagram and Typical Application

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Temperature Indicator Functionality

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Temperature Indicator Calibration

Calibration of the temperature indicator can be done in a number of ways; comparison to
another calibrated instrument, using decade box simulation, or in a controlled environment
such as an oil bath. The TI408 series indicator incorporates a calibration menu to adjust the
zero offset for each channel.

Controlled Environment / Comparison Method
The most accurate method of re-calibrating the indicator / sensor system is to place the
sensor(s) in a known environment such as an oil-bath or a calibration chamber and base all
measurements off of a known standard. Calibration using this method will account for any
lead-length or contact resistance, as well as any offset characteristics of the sensor. The
environment should have an accurate sensor or instrument (standard) with an accuracy of less
than or equal to 0.1°C from which all measurements will be based. To compare the calibration
of the indicator to another calibrated instrument or sensor, both sensors should be within 1” of
each other. Set the temperature of the environment to the mid-point of the desired
measurement range. For example, if all measurements fall within the range of 120°C to 135°C,
set the environment to 127.5°C. Wait for the indicator and standard to stabilize before
proceeding. Once the system is stable, follow the calibration procedures below for each
channel to calibrate the indicator.

Decade Box
Connect a resistance decade box with a resolution of at least .01 ohms to the desired input
(CH1-CH8) of the indicator. If unsure or concerned about the decade box’s accuracy, measure
the desired set-point using an accurate 4-wire ohmmeter. Set the decade box resistance to
simulate the mid-point of the desired measurement range. For example, if all measurements
fall within the range of 120°C to 135°C, simulate the resistance for 127.5°C (1488.92W for a PF

type sensor). Follow the instructions below to calibrate the indicator for each channel.

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Calibration Procedures:

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How to Order

TI408

Model Number:
TI408 = 8-Channel Handheld Temperature Indicator

PF

Element Type:
PF = 1000W Platinum RTD (TCR = .0385 W/W/°C, 1000W at 0°C) (Default)

TI408PF  Sample part number

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Warranty

Items returned within one year from the date of sale, transportation prepaid, which Minco

Products, Inc. (the “seller”) reasonably determines to be faulty by reason of defective materials
or faulty workmanship will be replaced or repaired at the seller’s discretion, free of charge.

This remedy is to be the sole and exclusive remedy available to the buyer in the event of a
breach by the seller. Items that show evidence of mishandling or misapplication may be
returned by the seller at the customer’s expense.

Furthermore, the seller is not to be held responsible for consequential damages caused by this
product except as required under Minnesota Statutes, Section 336.1-719 (3).

This warranty is in lieu of any other expressed warranty or implied warranty of merchantability
or fitness for a particular purpose, and of any other obligations or liability of the seller or its
employees or agent.

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Dimensions

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Minco (Main Office) Customer Service/ Minco S.A.

7300 Commerce Lane Order Desk: Usine et Service
Minneapolis, MN Tel: [phone] Commercial, Z.I.
55432 Fax: [phone] 09310 Aston, France
USA [e-mail] Tel: [phone]
Tel: [phone] www.minco.com Fax: [phone] Stock # 360-00112(A) 103395
Fax: [phone]

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