WAHL DST600, DST610, DST620 User Manual

DST600 • DST610 • DST620 Series

Digi-Stem

 Thermometer



User Manual

04/12/12
WD1032 Rev G

For use with model:
DST600, DST600R,
DST600I, DST610,
DST611, DST620 &
DST621

Wahl Instruments, Inc.

234 Old Weaverville Road

Asheville, NC 28804

Toll Free 800-421-2853

Phone [phone]

Fax [phone]

www.palmerwahl.com

DST600 • DST610 • DST620 Series USER MANUAL

WARRANTY & CALIBRATION

Index

1. Application and Key Features _________________________________________ 2

2. CE Approval _______________________________________________________ 3

3. Installation ________________________________________________________ 3

4. Battery Installation / Replacement / Battery Life ___________________________ 6

5. Operation _________________________________________________________ 7

6. Calibration ________________________________________________________ 9

7. Specifications – DST600 _____________________________________________ 10

8. DST610, DST611, DST620 and DST621 ________________________________ 11

9. Specifications – DST610, DST611, DST620, DST621 ______________________ 15

10. Service ___________________________________________________________ 16

Registration is fast and easy. In about a minute you
can have your product automatically registered for
Warranty Protection and our Calibration Reminder
service. Let Palmer Wahl help you protect your
investment, and maintain product accuracy and
compliance with ISO and other quality standards.
Questions? Call Customer Service
at 1-800-421-2853 or 828-658-3131
Or email: [e-mail]

REGISTRATION at

www.palmerwahl.com/register

1. Application and Key Features

The Wahl DST600 is designed for temperature monitoring applications,
specifically in the food, dairy and pharmaceutical markets, however it is well
suited for any application requiring a high degree of accuracy and reliability. To
achieve this objective the DST600 incorporates the following features:

• High reliability, 4-wire, 100 ohm, .00385Ω/Ω/°C, thin-film platinum RTD

sensor per DIN EN 60751, Class A.

• High accuracy 24-bit Delta-Sigma Analog/Digital Converter.

• Self-checking Electronic Circuitry: Meter repetitively checks the electronics

accuracy by measurement of on-board ultra-stable, low ppm precision
resistors against embedded firmware values and displays “err” in the event
the electronics is out by more than ±0.5°F (0.3°C). The self-checking
electronic circuit may be tested by rapidly changing the temperature of the
sensor, such as placing from room temperature into ice bath or heated
process. Unit will display “err” occasionally when going through rapid
changes and will return to normal as temperature begins to stabilize (usually

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DST600 • DST610 • DST620 Series USER MANUAL

within 10° of final temperature). This serves as a test and indicator that the
self-checking circuitry is functioning properly.

• Probe Error checking: Checks for open wire, open sensor, shorted sensor,

incorrect wiring.

• Probe ID feature: Alerts the operator that the probe has been changed and

the calibration may be void. Requires the use of calibration software to
calibrate and associate the new probe with the meter. Available on fixed
stem and remotes less than 25 meters.

• Programmable R0: Allows programming of the sensing probes specific R0

value into the meter for accurate temperature calibration.

2. CE Approval

The DST600 carries CE approval per EN61326: 2006 for Radiated
Electromagnetic Field Immunity, Electrostatic Discharge Immunity and Radiated
Emissions Disturbances. See sections 3.4 and 3.5 for detailed installation
instructions.

3. Installation

Caution! See important information regarding Lithium Batteries on the
enclosed document #WD1053, before proceeding!

Your unit was shipped partially assembled. Installation of the battery by the end­user is necessary as transportation regulations prohibit shipping units with the
battery installed. Units with long probes or remote cables may be shipped
unassembled. After installation of the battery, verify the display is operational
and remove the protective film from the window. In the event the display is not
operational, check that the battery is installed properly by following the battery
installation procedure, section 4.

3.1. Meter Mounting – Fixed Probe
Fixed probes may be mounted by the threaded fitting or sanitary clamp into
the process. Apply thread sealing compound or Teflon tape to the threaded
fitting as required. Units with swivel nut fittings or adjustable angle stems
may be adjusted after installation for best viewing angle.
Caution! Do not rotate Digi-Stems with adjustable angles more than 360° in
one direction as wire breakage may occur. See 3.7 for adjustment procedure.
Caution! Do not use the Digi-Stem enclosure to tighten meter. Use a wrench
on the coupling nut for tightening.

3.2. Meter Mounting – Remote Probe
An optional mounting bracket is available for mounting remote meters to
walls, panels, pipes, etc. The mounting bracket may be attached by the top
or rear surface with user provided mounting screws, clamps, etc. The
mounting bracket is available in 2 styles, p/n DSA3030, without ground lug
and DSA3031, which includes a grounding lug for grounding of the meter
when the probe will not be grounded.

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DST600 • DST610 • DST620 Series USER MANUAL

P1 Pin

Signal Name

Fixed Probe

Remote Probe

1 Excite +

White

Brown

2 RTD +

White

White

3 RTD

- Black

Blue

4 Excite

- Black

Black

5 Probe ID Ground

Brown

Gray

6 Probe ID Signal

Orange

Pink

3.2.1. For remote mounting: Mount the bracket with the Digi-Stem
mounting screw towards the bottom (Fig. 1). The Digi-Stem’s
coupling nut should be inserted from the top, with the display facing
out and secured with the Digi-Stem mounting screw. Loosen or
remove the Digi-Stem mounting screw.

3.2.2. For remote cables, thread the cable through the slotted sections of
the mounting bracket holes, so the cable moves freely. Insert the
meter’s coupling nut through the top hole of the mounting bracket and
secure with the large slotted Digi-Stem mounting screw.

Bracket Mounting
Holes

Fig. 1

Digi-Stem
Mounting Screw

3.3. Wire Connections – In the event that your probe was shipped
disconnected from the meter, the following describes the probe wiring and
installation process.

3.3.1. Loosen the four phillips head screws in the front cover until the
cover is removed. Note: The screws are held captive by retaining
washers and should not be removed completely.

3.3.2. Remove the 6 pin pluggable terminal strip connector (J1) from the
PCB mating connector and connect probe wires per the following
table and as shown in Fig. 4.

Probe Connection Wiring Wire Color

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DST600 • DST610 • DST620 Series USER MANUAL

3.3.3. Connect pluggable terminal strip to PCB connector J1.

3.3.4. Install battery with polarity as indicated on battery holder.

3.3.5. Replace cover on Digi-Stem enclosure and secure with four screws
tightened to a force of 4 to 5 in-lbs. of torque.

3.4. Ferrite Installation
The Wahl DST600 CE compliance requires installation of 2 clamp-on
ferrites around the internal wiring. These are normally installed when the
system is delivered, however on units with extremely long probes or when
meters are shipped without a probe, these may need to be installed by the
end-user.

There is 1 large ferrite and 1 small ferrite that are required to comply with
the CE directive. See Fig. 2 for reference. The wires coming from the
probe should be passed through the large ferrite, looped around once and
passed through again. Also, route the green/yellow PCB ground lead
through the ferrite once, with the Faston connector toward the probe end
of the ferrite. The large ferrite can then be snapped closed, making sure
that the wires are not pinched. The small ferrite is then installed on the
remaining length of all wires, toward the connector with it passing through
the ferrite only once. The wire does not have to loop through the small
ferrite. The small ferrite can then be snapped closed, making sure that the
wires are not pinched. Cable clamps can then be installed as shown (Fig.

3) to secure the ferrites in place.

Ground Wire Not
Looped

Probe Wire Loop 1 Time

Note:
Ferrites Shown
Open

Large Ferrite

Small Ferrite

Connector P1

Fig. 2

Fig. 3

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