Wahl TM602 User manual

1
Pocket RTD and Thermocouple
Temperature Meters and
Calibrators
TM602 • TM612(A) • TM630(A)
TC621 • TC622(A)
User Manual
Palmer Wahl
234 Old Weaverville Road
Asheville, NC 28804
Toll Free 800-421-2853
Phone [phone]
Fax [phone]
www.palmerwahl.com
WD1017 Rev E
Revised 01/26/23

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TC6XX-TM6XX Series
Warranty
Manufacturer warrants all Wahl TC6XX and TM6XX Series Calibrators distributed by us to be free from
defects in material or workmanship under normal use and service. We agree to repair or replace any product
listed above which upon examination is revealed to have been defective due to faulty workmanship or material
if returned to our factory, transportation charges prepaid, within the product specific warranty period of one (1)
year from date of purchase. This warranty does not include does not cover fuses or interchangeable batteries/
cells. This warranty is in lieu of all other warranties, expressed or implied and of all obligations or liabilities on
its part for damages including but not limited to normal wear and tear or consequential damages following the
use or misuse of this or any instrument sold by the Manufacturer. In addition, if the product is tampered with in
any way or calibrated in any way other than by the instructions supplied by Palmer Wahl, it will immediately
void the warranty. No agent is authorized to assume, for us, any liability except as set forth above. Freight cost
to return item(s) for evaluation, duties and other fees are not covered by the manufacturer.
Product is automatically registered for warranty by serial number at time of purchase. Serial number must
remain attached to product upon return.

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Product Verification
Each TC6XX-TM6XX unit has been checked mechanically and electrically prior to delivery. The necessary
precautions have been taken to ensure it reaches the user without being damaged.
Nonetheless, it is wise to perform a rapid check for any damage which may have occurred during transport. If this is
the case, inform the carrier immediately.
The standard accessories included with the units are:
User manual (available online)
4 AA batteries (1.5 V)
Protection sheath or boot
Carrying Case (TC6XX only)
Wrist strap
Certificate of Conformance
If the product needs to be returned, go to palmerwahl.com and click on: Request an RMA (Return Material Authorization
Number) and follow the instructions. You will receive your RMA number via email once your item is received at our facility.
If you prefer, call Customer Service at: 1-800-421-2853 for assistance with the RMA process.
TC621 includes 1 set of 2 test leads
TC622A includes 2 sets of 2 test leads

CONTENTS
4
TC6XX-TM6XX Series
Contents
A. General ........................................................................................................................................................................... 5
A.1 Introduction .................................................................................................................................................................. 5
A.2 Definition of the range .................................................................................................................................................. 5
A.3 Parts ............................................................................................................................................................................. 5
A.4 Directives CE ...............................................................................................................................................................6
A.4.1 Conformity with standards .....................................................................................................................................6
A.4.2 Environmental conditions .......................................................................................................................................6
A.4.3 Worn devices .........................................................................................................................................................6
A.4.4 Instructions ............................................................................................................................................................6
A.4.5 Making measurements ..........................................................................................................................................7
A.4.6 Unusual faults and stresses ...................................................................................................................................7
A.4.7 Definitions ............................................................................................................................................................ ..7
A.5 Maintenance ................................................................................................................................................................8
B. Using the instrument .......................................................................................................................................................9
B.1 Power-up ......................................................................................................................................................................9
B.1.1 Battery replacement ...............................................................................................................................................9
B.1.2 Back-up battery (date and time).............................................................................................................................9
B.1.3 The keyboard .........................................................................................................................................................9
B.1.4 The measuring and simulation terminals for each device ....................................................................................10
B.1.5 The USB connector .............................................................................................................................................12
B.1.6 The screen ...........................................................................................................................................................12
B.1.7 Operating modes .................................................................................................................................................13
C. Programming MODE .....................................................................................................................................................15
C.1 Voltage / resistance or temperature measurement ....................................................................................................15
C.2 Voltage / resistance or temperature simulation ..........................................................................................................17
D. Related Functions .........................................................................................................................................................20
D.1 Scaling .......................................................................................................................................................................20
D.2 Differential measurements .........................................................................................................................................21
D.3 Calibrated sensors .....................................................................................................................................................22
D.4 Configuration of default value points ..........................................................................................................................24
D.5 Storage of acquisitions in progress ............................................................................................................................25
D.5.1 Synthesizer configuration ....................................................................................................................................29
D.5.2 Configuration of the ramp generation ..................................................................................................................30
E. Parameter settings ........................................................................................................................................................33
E.1 Contrast adjustment ...................................................................................................................................................33
E.2 Date and time setting .................................................................................................................................................33
E.3 “Preferences” setting ..................................................................................................................................................33
E.3.1 Filtering setting ....................................................................................................................................................33
E.3.2 Display resolution setting .....................................................................................................................................34
E.3.3 Lighting duration setting .......................................................................................................................................34
E.3.4 “Key beeping” setting ...........................................................................................................................................34
E.3.5 Language setting .................................................................................................................................................34
E.3.6 Temperature unit setting ......................................................................................................................................34
E.4 “Maintenance” menu ..................................................................................................................................................35
E.4.1 Adjustment from the Maintenance menu .............................................................................................................35
E.5 “About the instrument” menu ......................................................................................................................................38
F. Software Update ...........................................................................................................................................................39
G. Technical specifications ................................................................................................................................................40
G.1 Thermocouple measurement function ........................................................................................................................40
G.1.1 Constant voltage (TC621,TM602 and TM630).....................................................................................................40
G.1.2 Temperature by thermocouples (TC621,TM602 et TM630). ...............................................................................40
G.2 Thermocouple emission function (TC621) .................................................................................................................42
G.2.1 Constant voltage ..................................................................................................................................................42
G.2.2 Temperature by thermocouple ............................................................................................................................42
G.3 Resistive sensor measurement function ....................................................................................................................44
G.3.1 Resistance (TC622, TM612 and TM630) .............................................................................................................44
G.3.2 Temperature by resistive sensors (TC622, TM612 and TM630)..........................................................................44
G.4 Resistive sensor simulation function (TC622) ............................................................................................................45
G.4.1 Resistance ...........................................................................................................................................................45
G.4.2 Temperature by resistive sensors ........................................................................................................................45

Introduction A
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A. GENERAL
A.1 Introduction
The TC6XX-TM6XX Series range is made of 5 temperature measurement and/or calibration devices for thermocouples
and resistive sensors. They are especially designed for calibration and maintenance. It makes it possible to
measure and to emit electrical measurements and to simulate temperatures both on site as well as in a laboratory.
The TC6XX-TM6XX Series range features a large number of related functions which extend its range of application, including:
Generation of default values, increases, single or cyclic ramps (for TC621 and TC622).
Storage of acquisitions and display in the form of tables or trend curves.
Use of calibrated sensors with their coefficients of correction
A range of improvements facilitates its operation:
Rapid access to all functions.
Intuitive user interface.
160x160 graphic display
Connection via 4 mm safety plugs or a miniature flat plug.
Connection via 4 mm safety plugs or miniature flat plugs for thermocouple temperature calibrators and
connection by 4 mm safety plugs or 4-pt circular connector for resistive sensor temperature calibrators.
Power supply via 4 AA batteries or rechargeable batteries with internal charger (Option).
The units are fitted in an elastomer-sheathed ABS case.
A.2 Definition of the Series
The Series is detailed in the table below:
Thermocouple
measurement
Thermocouple
emission
Resistive sensor
measurement
Resistive sensor
simulation
TC621
X
X
TC622A
X
X
TM602A
X
TM612
X
TM630A
X
X
A.3 Parts
General characteristics:
Portable device powered by 4 AA batteries (pack of Ni-MH storage batteries, 1.7 Ah optional).
Wrist strap for carrying and use on-site
Graphic liquid crystal display: 160 x 160 pixels.
Choice of language used for messages and programming of functions, gauges and parameters via 6-key
keyboard + 1 navigator.
Backlit display accessible via a keyboard key, with the possibility of automatic black-out after a specific
programmable period of inactivity.
Housing: ABS case (elastomer-sheath or boot).
Size: 6.18 x 3.34 x 1.77 in (157 x 85 x 45 mm (without boot).
Weight: 10.8 ounces (306 g) without boot.
IP54 tightness in compliance with standard EN 60529

GENERAL
6
TC6XX-TM6XX Series
A.4 Directives CE
A.4.1 Conformity with standards
The device complies with the applicable directives in force on the subject of electrical safety (2006/95/CE) as well as on
the electromagnetic compatibility of the electrical measuring instruments (2004/108/CE).
These instructions for use contain information and warnings which must be observed by the user to protect the latter
against the dangers of electricity, to ensure the safe operation of the device and to protect it against any mishandling
which could damage or compromise the safety of use of the device.
A.4.2 Environmental conditions
In accordance with publication CEI 359: operating category I.
Range of application of standards: from 0 to 2,200 m.
Reference temperature range: 23°C ± 5°C, relative humidity: 45% to 75%.
Nominal operating range: -10°C to +50°C, relative humidity: 20% to 80% non-condensing.
Operating range limit: -15°C to +55°C, relative humidity: 10% to 80% (70% at 55°C).
Storage and transport temperature range limit: - 30°C to + 60°C (without the batteries).
A.4.3 Worn devices
Worn electrical devices can pollute the environment. We recommend you refrain from disposing of this device in an
ordinary waste bin, but rather that you use the recycling circuits available locally.
A.4.3.1 Waste generated by the device
List of waste classified:
16.02.14: Waste originating from electronic equipment:
Printed circuit boards making up the device
16.06.02: Batteries and storage battery (dangerous)
Alkaline batteries
3 V lithium battery (CR1225 type)
Or Ni-MH batteries (If the unit is equipped with an 12436-01 battery pack)
15.01.02: Packaging
ABS plastic and polycarbonate device casing
Elastomer sheath or boot
A.4.3.2 Device destruction procedure
Open the device: unscrew the screw on the battery compartment, followed by the 5 screws securing the 2 shells.
Separate the 2 shells. Separate the PCB from the upper shell.
With regard to the batteries, you will find them in the battery compartment (see commissioning chapter).
In the case of the pack of batteries, there are 2 contaminants: NI-MH (Nickel-Metal Hybrid) batteries and a PCB. Separate
these 2 items.
A.4.4 Instructions
The unit is designed to be used in complete safety if the instructions given in the accompanying documents are followed.
Any use apart from those defined, may prejudice the safety of the operator and is therefore dangerous and forbidden.

Directives CE A
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A.4.5 Making measurements
Measuring wires and leads must be in good condition and must be replaced if their insulation appears defective (insulation
cut, burned, etc.).
Never exceed the protection value limits indicated in the specifications.
Before changing function, disconnect the measuring wires from the external circuit. When voltage measurements are
being made, even weak ones, keep in mind that the circuits may feature a dangerous voltage for the operator compared to
the ground.
Do not make any measurements when the device is linked up to another device using the USB link or when the batteries
are being charged.
A.4.6 Unusual faults and stresses
Whenever it is believed that the protection has been damaged, switch off the unit and ensure that it is not used
prematurely.
The protection may have been damaged if, for example:
There is obvious damage to the unit.
The unit is no longer able to make accurate measurements.
The unit has been stored under unfavorable conditions.
The unit has been subjected to severe stress during transportation.
A.4.7 Definitions
A.4.7.1 Definition of the category and degree of pollution
CAT II 60V:
This notion of categories determines the maximum voltage which can be applied to the measuring inputs (it is also
referred to as the overvoltage category). For the TC621, the ceiling overvoltage is (DC or AC)
POL 2°:
The notion of pollution determines the clearance between circuits. Degree 2 authorizes temporary conductivity caused by
condensation.
A.4.7.2 Table of symbols used
Symbol
Description
Warning: see accompanying documents
Earth point
Complies with European Union directives
60V
CAT II Pol 2
Category II, Pollution 2.
Maximum common mode voltage compared with the ground = 60 V
Do not discard. See chapter Used devices (see section A.3.3)
Do not discard. See chapter Used devices (see section A.3.3)

GENERAL
8
TC6XX-TM6XX Series
A.5 Maintenance
The unit must always be set up according to the instructions in this notice. Any incomplete or poorly executed set up
may compromise the safety of the operator.
The responsible authority must ensure on a regular basis that factors affecting safety do not change with time and carry
out any necessary preventive work.
Before opening the unit for any maintenance operations, you must ensure that all wires are disconnected from the unit.
Any adjustment, maintenance or repair of an open unit must be avoided as far as possible and, if essential, must be
carried out by qualified personnel who are familiar with the risks involved.

Power-up B
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B. USING THE INSTRUMENT
In order to use the device with all the safety requirements, all operators must read the paragraph on safety carefully,
along with the paragraph below.
B.1 Power-up
B.1.1 Battery replacement
The instrument is supplied with four 1.5V AA batteries. The batteries must be installed in the battery compartment in the
back of the instrument. To open the compartment, remove the cover screw. Screw the cover back on after inserting the
batteries.
Pay attention to the polarity when installing the batteries as an error could damage the instrument. The polarity is indicated
inside the compartment cover.
The figure below illustrates how to open the battery compartment as well as the correct positioning of each battery.
After inserting the dry cells (or NiMH batteries) correctly, press the ON/OFF key to turn ON the product.
To turn the unit off completely, press the ON/OFF key until the "Instrument in power off mode" screen comes up.
Date and hours are saved by a lithium battery.
B.1.2 Back-up battery (date and time)
The back-up of the date and time when the unit is powered down is guaranteed by a 3V lithium battery – type CR1225.
The battery is located inside the unit and can be accessed by removing the 5 screws on the back of the unit.
B.1.3 The keyboard
The keyboard features:
2 function keys (F1 and F2) for the selection of the various menus displayed on the screen.
The navigator, consisting of 4 arrows (up (), down (), right (), left ()
A clear key (CLEAR).
A device on/off and backlighting on/off key (ON/OFF).
Press briefly to start the device. During operation, press briefly to turn the lighting on or off. Press it longer for 2
seconds to stop the device.
A validation key (VAL).
A HOLD key allows you to suspend a process temporarily
Battery compartment
screw
Product code label
location

USING THE INSTRUMENT
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TC6XX-TM6XX Series
B.1.4 The measuring and simulation terminals for each device
Both the TC621 and TM602 are fitted with 2 safety bushes (4 mm in diameter) and a miniature flat plug for
thermocouples. These connector assemblies are used both in measurement and emission modes (non simultaneous).
Both the TC622 and TM612 are fitted with 4 safety bushes (4 mm in diameter) and a 4-pt circular connector. These
connector assemblies are used both in measurement and emission modes (non simultaneous).
HOLD key
F1 function key
CLEAR key
Navigation key
ON/OFF key
Confirmation
key (VAL)
F2 function key
Positive terminal in
measurement and
emission
Negative terminal in
measurement and emission
Positive terminal in
measurement and
emission
Negative terminal in
measurement and
emission