Kobold PSD Operating Manual

Operating Instructions

for

Display Pressure Switch

Model: PSD

PSD

We don’t accept warranty and liability claims neither upon this publication nor in
case of improper treatment of the described products.

The document may contain technical inaccuracies and typographical errors. The
content will be revised on a regular basis. These changes will be implemented in
later versions. The described products can be improved and changed at any time
without prior notice.

© Copyright
All rights reserved.

1. Contents

1. Contents ........................................................................................................ 2

2. Note .............................................................................................................. 3

3. Instrument Inspection .................................................................................... 3

4. Regulation Use .............................................................................................. 3

5. Operating Principle ........................................................................................ 4

6. Mechanical Connection ................................................................................. 4

7. Electrical Connection .................................................................................... 5

7.1 Output signal / supply voltage ................................................................ 5

8. Operating menu ............................................................................................ 6

9. Type label description ................................................................................... 8

10.Technical Information .................................................................................... 8

11.Terminology ................................................................................................ 11

12.Order Codes ............................................................................................... 13

13.Dimensions ................................................................................................. 13

14.EU Declaration of Conformance .................................................................. 14

Manufactured and sold by:

Kobold Messring GmbH

Nordring 22-24

D-65719 Hofheim

Tel.: [phone]

Fax: [phone]

E-Mail: [e-mail]

Internet: www.kobold.com

page 2 PSD K02/0118

PSD

2. Note

Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.

When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.

3. Instrument Inspection

Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.

Scope of delivery:

The standard delivery includes:

 Display Pressure Switch model: PSD
 Operating Instructions

4. Regulation Use

Any use of the Display Pressure Switch, model: PSD, which exceeds the
manufacturer’s specification, may invalidate its warranty. Therefore, any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.

PSD K02/0118 page 3

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5. Operating Principle

KOBOLD is a leading international supplier of high quality sensors and monitoring
instruments among other things for measurement of pressure and temperature.
The PSD is the ideal combination of pressure switch and transmitter with a
pressure display. The parameters can be set on the device. The settings in
combination with a comprehensive set of options make the PSD suitable for a
wide range of demanding applications.

6. Mechanical Connection

page 4 PSD K02/0118

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7. Electrical Connection

7.1 Output signal / supply voltage

Output I

4...20 mA ≤ 30 mA 15...30 VDC

0...10 VDC ≤ 30 mA 15...30 VDC

Switching output functions

SUPPLY

U

SUPPLY

PSD K02/0118 page 5

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8. Operating menu

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Parameter

Name Standard setting

Switch point SP1 (hysteresis mode)
Upper switch point FH1 (window mode)

Reset point RP1 (hysteresis mode)
Lower switch point FL1 (window mode)

Switch point SP2 (hysteresis mode)
Upper switch point FH2 (window mode)

Reset point RP2 (hysteresis mode)
Lower switch point FL2 (window mode)

Switch point delay time SP1 (hysteresis
mode)
Switch point delay time FH1 (window
mode)
Switch point delay time RP1 (hysteresis
mode)
Switch point delay time FL1 (window
mode)
Switch point delay time SP2 (hysteresis
mode)
Switch point delay time FH2 (window
mode)
Switch point delay time RP2 (hysteresis
mode)
Switch point delay time FL2 (window
mode)

Functions switching output 1 Hysteresis, closer (Hno)

Functions switching output 2 Hysteresis, closer (Hno)

Pressure units bar bar, psi, MPa, kPa, mWC uni
Measuring range adjustment 100 % nominal pressure 50…100% nominal pressure P-EP
Damping (analogue output) 0.01 s 0.01…3.00 s (time constant) dAA
Display rotation no no, yes (180°) disr

Display mode Current pressure value

Display update 2 1, 2, 5, 20 Hz duPd

(accessory ZS)

75% measuring range

25% measuring range

75% measuring range

25% measuring range

0 0...99.99 s dS1

0 0...99.99 s dR1

0 0...99.99 s dS2

0 0...99.99 s dR2

Hysteresis NO (Hno), hysteresis NC (Hnc),

window NO (Fno), window NC (Fnc)

Hysteresis NO (Hno), hysteresis NC (Hnc),

window NO (Fno), window NC (Fnc)

current, highest, lowest, display off

decimal places selectable (max. 3)

Value range Short name

SP1RP1

FH1FL1

hysteresis≥1% FS

RP1<SP1

FL1<FH1

hysteresis ≥ 1% FS

SP2RP2

FH2FL2

hysteresis≥ 1% FS

RP2<SP2

FL2<FH2

hysteresis ≥ 1% FS

Pressure value:

Current value:

SP1

RP1

SP2

RP2

ou1

ou2

dis

PSD K02/0118 page 7

PSD

9. Type label description

10. T echnical Information

Measuring principle: thin film on steel
Measuring range: -1...+1.5 to 0...600 bar

-14.5...+22 to 0...7500 psi
adjustable 50...100 % FS
Output signal: 4...20 mA

0...10 V
Switching output: 2 transistors PNP
Accuracy@ 25° C typ.: ±0.5 % FS typ.
Media temperature: -25° C...+85° C
Ambient temperature: -25° C...+85° C
Pressure unit for display: bar, psi, MPa, kPa, m WC, mm WC

Electrical data

Output/supply voltage: 4...20 mA: 24 or 0-10 V

Switch-on-delay: typ. 200 ms
Inverse-polarity protection,
Short-circuit strength
@ 25° C during 5 min.; integrated
Current consumption: ≤30 mA

24 (15...30) VDC

switchable mA or V

DC,

DC/

page 8 PSD K02/0118

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Environmental conditions

Media temperature: -25° C...+85° C
Ambient temperature: -25° C...+85° C
Protection1): IP65
Humidity: max. 95% relative
Vibration: 10 g (10...2000 Hz)
Shock: 50 g/ 3 ms

1)

see electrical connection

Analogue output

Output signal: switchable 4-20 mA or 0-10 V
Accuracy: TEB

2)

@ -25 °C...+85° C
[% FS typ.] ± 1.75
accuracy @ +25° C
[% FS typ.] ±0.5

2)

NLH

@ +25° C (BSL)
[% FS typ.] ±0.2
TC

2)

zero point and span
[% FS typ.] ±0.03
long term stability 1 year
[% FS typ.] ±0.1
Current limiting output signal: 4-20 mA (overload)

0...10 VDC: <40 mA (short-circuit)
Damping (rise-time): 0.01...3.00 s/10...90% nominal pressure

Switching output

Accuracy: accuracy@ +25° C
[% FS typ.] ± 0.5
TEB2) @ -25 °C...+85° C
[% FS typ.] ± 1.0
accuracy @ +25° C
long term stability 1 year
[% FS typ.] ±0.3
Adjustment range of
switchpoints: 0...100% FS
Switching hysteresis: ≥ 1% FS switchpoint  reset point
Switching resistance: ≤ 3 Ω
Output function: hysteresis, window; normally open (NO),
normally closed (NC)
Switching current: ≤ 0.5 A each switching output
Current limiting: ≤ 2 A each switching output
Switching frequency: max. 200 Hz
Delay time: 0...99.99 s

2)

see »Terminology«

DC

PSD K02/0118 page 9

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Display

Display: 4-digit 7-segment display 180 °
flippable with disable function
standard decimal places:
≤9: 3 decimal places

10...99: 2 decimal places

100...999: 1 decimal place
Switching status indication: 2 LED, red
Operation: with 3 buttons and menu navigation
according to VDMA 24574-1
Display reduction: 0.1 % FS
Display range: -3...103% FS
Setting parameters: see table “Parameter”

Mechanical data

Sensor (wetted parts) 1.452 (AISI630)
Pressure connection
(wetted parts): 1.452 (AISI630)
Housing: steel, die cast metal galvanised,
display housing plastic
Connection: G¼ male,
adapter can be ordered as separate item
Sealing: FPM
Male electrical plug: PA-plug M12x1.5 pin
Mounting torque: 15...20 Nm
Housing alignment: display 335 ° rotatable, max. 2.5 Nm
electrical connection 343° rotatable, max. 5 Nm
Pressure peak
damping element: ø 0.4 mm
Weight: ~189 g

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11. T erminology

Non-linearity

The largest deviation from the effective characteristic line of an ideal reference
line. The reference line can be defined as a limit point adjustment, a BSL or a
BSL through 0.

Specifications: Non-linearity, Hysteresis

BSL through Zero

As an additional requirement for the minimum value adjustment, the BSL
through zero (also BSL/0) must go straight through zero or the origin.

Specifications: Accuracy NLH (BSL through zero)

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BSL Best Straight Line

The reference line according to the BSL or the minimum value adjustment is
placed in such a way that the maximum positive and negative deviations are as
small as possible.

Specifications: Non-linearity, Hysteresis

Specifications: Accuracy NLH (BSL)

NLH Non-linearity an d Hysteresis

Largest deviation from the ideal characteristic line (BSL, BSL/0 or limit point). In
pressure measuring instruments, the non-linearity and pressure hysteresis are

given together at a constant temperature.
Temperature Coefficient TC

Change of measured value for zero point and span as a result of changes in
temperature

Long-term Stability Long-term Drift

The change of accuracy due to aging under certain reference conditions
during a certain period of time, typically 1 year.

TEB Total Error Band

Total error (root from sum of the square of the deviations) due to measurement
deviations (accuracy) and temperature influence (temperature coefficient TC).
The temperature influence is usually given in the information across a range
larger than that given in the standard (-10 ... +60 °C). Whilst DIN 16086 also
continues to add to the long-term stability over a year, the information is subject
to ex-works conditions for obvious reasons.

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12. Order Codes

Example: PSD-4 3 3 R2 B4 4

Model Version

4 = 2x PNP

switching

PSD-

* Other ranges on request

output,
analogue
output
4-20 mA

Electrical

connection

3 = M12 plug,

24 (15-30) V

13. Dimensions

Material Connection

3 = FPM

DC

o-ring,
st. steel
connection

R2 = G¼ male

Measuring range *

[bar]
A1 = -1...1.5
A4 = -1...9
B6 = 0...6
B7 = 0...10
B8 = 0...16
B9 = 0...25
C2 = 0...100
C3 = 0...160
C4 = 0...250
C5 = 0...400

Option

4 = pressure peak

damping element
D = 0.4 mm

Special
version

0 = none
Y = special

version
(specify in
clear text)

[mm]

PSD PSD...R2...

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14. EU Declaration of Conformance

We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:

Display Pressure Switch Model: PSD

to which this declaration relates is in conformity with the standards noted below:

EN 61000-6-2: 2006 Electromagnetic compatibility (EMC) - Part 6-2: Generic

standards - Immunity for industrial environments

EN 61000-6-3:2007 + A1:2010 Electromagnetic compatibility (EMC) -

Part 6-3: Generic standards - Emission standard for residential, commercial and
light-industrial environments

Also the following EC guidelines are fulfilled:

2014/30/EU EMC Directive
2011/65/EU RoHS (category 9)

Hofheim, 12. Febr. 2018
H. Peters M. Wenzel
General Manager Proxy Holder

page 14 PSD K02/0118